r300: Add radeon_program and trivial refactoring of r300_fragprog to use it

The idea/hope is that radeon_program will serve as an intermediate
representation for r3xx up to r6xx fragment and vertex programs.
Right now, it is nothing more than a simplistic wrapper around Mesa's
prog_instruction, together with the notion of clauses, taken from r6xx docs.

The clauses will eventually be used to represent the nodes that are used in
r300 family fragment programs.

6 files changed, 2564 insertions, 2202 deletions

diff --git a/src/mesa/drivers/dri/r300/Makefile b/src/mesa/drivers/dri/r300/Makefile
index 5b2bd0bc2b0..7cd56470641 100644
--- a/src/mesa/drivers/dri/r300/Makefile
+++ b/src/mesa/drivers/dri/r300/Makefile
@@ -37,8 +37,10 @@ DRIVER_SOURCES = \
 		 r300_texmem.c \
 		 r300_tex.c \
 		 r300_texstate.c \
+		 radeon_program.c \
 		 r300_vertprog.c \
 		 r300_fragprog.c \
+		 r300_fragprog_emit.c \
 		 r500_fragprog.c \
 		 r300_shader.c \
 		 r300_emit.c \
diff --git a/src/mesa/drivers/dri/r300/r300_fragprog.c b/src/mesa/drivers/dri/r300/r300_fragprog.c
index 9d7a8c65700..94cb11afecb 100644
--- a/src/mesa/drivers/dri/r300/r300_fragprog.c
+++ b/src/mesa/drivers/dri/r300/r300_fragprog.c
@@ -28,16 +28,14 @@
 /**
  * \file
  *
- * \author Ben Skeggs <[email protected]>
+ * Fragment program compiler. Perform transformations on the intermediate
+ * \ref radeon_program representation (which is essentially the Mesa
+ * program representation plus the notion of clauses) until the program
+ * is in a form where we can translate it more or less directly into
+ * machine-readable form.
  *
+ * \author Ben Skeggs <[email protected]>
  * \author Jerome Glisse <[email protected]>
- *
- * \todo Depth write, WPOS/FOGC inputs
- *
- * \todo FogOption
- *
- * \todo Verify results of opcodes for accuracy, I've only checked them in
- * specific cases.
  */
 
 #include "glheader.h"
@@ -49,2047 +47,46 @@
 
 #include "r300_context.h"
 #include "r300_fragprog.h"
-#include "r300_reg.h"
 #include "r300_state.h"
 
-/* Mapping Mesa registers to R300 temporaries */
-struct reg_acc {
-	int reg;		/* Assigned hw temp */
-	unsigned int refcount;	/* Number of uses by mesa program */
-};
-
-/**
- * Describe the current lifetime information for an R300 temporary
- */
-struct reg_lifetime {
-	/* Index of the first slot where this register is free in the sense
-	   that it can be used as a new destination register.
-	   This is -1 if the register has been assigned to a Mesa register
-	   and the last access to the register has not yet been emitted */
-	int free;
-
-	/* Index of the first slot where this register is currently reserved.
-	   This is used to stop e.g. a scalar operation from being moved
-	   before the allocation time of a register that was first allocated
-	   for a vector operation. */
-	int reserved;
-
-	/* Index of the first slot in which the register can be used as a
-	   source without losing the value that is written by the last
-	   emitted instruction that writes to the register */
-	int vector_valid;
-	int scalar_valid;
-
-	/* Index to the slot where the register was last read.
-	   This is also the first slot in which the register may be written again */
-	int vector_lastread;
-	int scalar_lastread;
-};
-
-/**
- * Store usage information about an ALU instruction slot during the
- * compilation of a fragment program.
- */
-#define SLOT_SRC_VECTOR  (1<<0)
-#define SLOT_SRC_SCALAR  (1<<3)
-#define SLOT_SRC_BOTH    (SLOT_SRC_VECTOR | SLOT_SRC_SCALAR)
-#define SLOT_OP_VECTOR   (1<<16)
-#define SLOT_OP_SCALAR   (1<<17)
-#define SLOT_OP_BOTH     (SLOT_OP_VECTOR | SLOT_OP_SCALAR)
-
-struct r300_pfs_compile_slot {
-	/* Bitmask indicating which parts of the slot are used, using SLOT_ constants
-	   defined above */
-	unsigned int used;
-
-	/* Selected sources */
-	int vsrc[3];
-	int ssrc[3];
-};
-
-/**
- * Store information during compilation of fragment programs.
- */
-struct r300_pfs_compile_state {
-	r300ContextPtr r300;
-	struct r300_fragment_program *fp;
-
-	int nrslots;		/* number of ALU slots used so far */
-
-	/* Track which (parts of) slots are already filled with instructions */
-	struct r300_pfs_compile_slot slot[PFS_MAX_ALU_INST];
-
-	/* Track the validity of R300 temporaries */
-	struct reg_lifetime hwtemps[PFS_NUM_TEMP_REGS];
-
-	/* Used to map Mesa's inputs/temps onto hardware temps */
-	int temp_in_use;
-	struct reg_acc temps[PFS_NUM_TEMP_REGS];
-	struct reg_acc inputs[32];	/* don't actually need 32... */
-
-	/* Track usage of hardware temps, for register allocation,
-	 * indirection detection, etc. */
-	GLuint used_in_node;
-	GLuint dest_in_node;
-};
-
-
-/*
- * Usefull macros and values
- */
-#define ERROR(fmt, args...) do {			\
-		fprintf(stderr, "%s::%s(): " fmt "\n",	\
-			__FILE__, __FUNCTION__, ##args);	\
-		fp->error = GL_TRUE;			\
-	} while(0)
-
-#define PFS_INVAL 0xFFFFFFFF
-#define COMPILE_STATE \
-	struct r300_fragment_program *fp = cs->fp; \
-	struct r300_fragment_program_code *code = &fp->code; \
-	(void)code
-
-#define SWIZZLE_XYZ		0
-#define SWIZZLE_XXX		1
-#define SWIZZLE_YYY		2
-#define SWIZZLE_ZZZ		3
-#define SWIZZLE_WWW		4
-#define SWIZZLE_YZX		5
-#define SWIZZLE_ZXY		6
-#define SWIZZLE_WZY		7
-#define SWIZZLE_111		8
-#define SWIZZLE_000		9
-#define SWIZZLE_HHH		10
-
-#define swizzle(r, x, y, z, w) do_swizzle(cs, r,		\
-					  ((SWIZZLE_##x<<0)|	\
-					   (SWIZZLE_##y<<3)|	\
-					   (SWIZZLE_##z<<6)|	\
-					   (SWIZZLE_##w<<9)),	\
-					  0)
-
-#define REG_TYPE_INPUT		0
-#define REG_TYPE_OUTPUT		1
-#define REG_TYPE_TEMP		2
-#define REG_TYPE_CONST		3
-
-#define REG_TYPE_SHIFT		0
-#define REG_INDEX_SHIFT		2
-#define REG_VSWZ_SHIFT		8
-#define REG_SSWZ_SHIFT		13
-#define REG_NEGV_SHIFT		18
-#define REG_NEGS_SHIFT		19
-#define REG_ABS_SHIFT		20
-#define REG_NO_USE_SHIFT	21	// Hack for refcounting
-#define REG_VALID_SHIFT		22	// Does the register contain a defined value?
-#define REG_BUILTIN_SHIFT   23	// Is it a builtin (like all zero/all one)?
-
-#define REG_TYPE_MASK		(0x03 << REG_TYPE_SHIFT)
-#define REG_INDEX_MASK		(0x3F << REG_INDEX_SHIFT)
-#define REG_VSWZ_MASK		(0x1F << REG_VSWZ_SHIFT)
-#define REG_SSWZ_MASK		(0x1F << REG_SSWZ_SHIFT)
-#define REG_NEGV_MASK		(0x01 << REG_NEGV_SHIFT)
-#define REG_NEGS_MASK		(0x01 << REG_NEGS_SHIFT)
-#define REG_ABS_MASK		(0x01 << REG_ABS_SHIFT)
-#define REG_NO_USE_MASK		(0x01 << REG_NO_USE_SHIFT)
-#define REG_VALID_MASK		(0x01 << REG_VALID_SHIFT)
-#define REG_BUILTIN_MASK	(0x01 << REG_BUILTIN_SHIFT)
-
-#define REG(type, index, vswz, sswz, nouse, valid, builtin)	\
-	(((type << REG_TYPE_SHIFT) & REG_TYPE_MASK) |			\
-	 ((index << REG_INDEX_SHIFT) & REG_INDEX_MASK) |		\
-	 ((nouse << REG_NO_USE_SHIFT) & REG_NO_USE_MASK) |		\
-	 ((valid << REG_VALID_SHIFT) & REG_VALID_MASK) |		\
-	 ((builtin << REG_BUILTIN_SHIFT) & REG_BUILTIN_MASK) |	\
-	 ((vswz << REG_VSWZ_SHIFT) & REG_VSWZ_MASK) |			\
-	 ((sswz << REG_SSWZ_SHIFT) & REG_SSWZ_MASK))
-#define REG_GET_TYPE(reg)						\
-	((reg & REG_TYPE_MASK) >> REG_TYPE_SHIFT)
-#define REG_GET_INDEX(reg)						\
-	((reg & REG_INDEX_MASK) >> REG_INDEX_SHIFT)
-#define REG_GET_VSWZ(reg)						\
-	((reg & REG_VSWZ_MASK) >> REG_VSWZ_SHIFT)
-#define REG_GET_SSWZ(reg)						\
-	((reg & REG_SSWZ_MASK) >> REG_SSWZ_SHIFT)
-#define REG_GET_NO_USE(reg)						\
-	((reg & REG_NO_USE_MASK) >> REG_NO_USE_SHIFT)
-#define REG_GET_VALID(reg)						\
-	((reg & REG_VALID_MASK) >> REG_VALID_SHIFT)
-#define REG_GET_BUILTIN(reg)						\
-	((reg & REG_BUILTIN_MASK) >> REG_BUILTIN_SHIFT)
-#define REG_SET_TYPE(reg, type)						\
-	reg = ((reg & ~REG_TYPE_MASK) |					\
-	       ((type << REG_TYPE_SHIFT) & REG_TYPE_MASK))
-#define REG_SET_INDEX(reg, index)					\
-	reg = ((reg & ~REG_INDEX_MASK) |				\
-	       ((index << REG_INDEX_SHIFT) & REG_INDEX_MASK))
-#define REG_SET_VSWZ(reg, vswz)						\
-	reg = ((reg & ~REG_VSWZ_MASK) |					\
-	       ((vswz << REG_VSWZ_SHIFT) & REG_VSWZ_MASK))
-#define REG_SET_SSWZ(reg, sswz)						\
-	reg = ((reg & ~REG_SSWZ_MASK) |					\
-	       ((sswz << REG_SSWZ_SHIFT) & REG_SSWZ_MASK))
-#define REG_SET_NO_USE(reg, nouse)					\
-	reg = ((reg & ~REG_NO_USE_MASK) |				\
-	       ((nouse << REG_NO_USE_SHIFT) & REG_NO_USE_MASK))
-#define REG_SET_VALID(reg, valid)					\
-	reg = ((reg & ~REG_VALID_MASK) |				\
-	       ((valid << REG_VALID_SHIFT) & REG_VALID_MASK))
-#define REG_SET_BUILTIN(reg, builtin)					\
-	reg = ((reg & ~REG_BUILTIN_MASK) |				\
-	       ((builtin << REG_BUILTIN_SHIFT) & REG_BUILTIN_MASK))
-#define REG_ABS(reg)							\
-	reg = (reg | REG_ABS_MASK)
-#define REG_NEGV(reg)							\
-	reg = (reg | REG_NEGV_MASK)
-#define REG_NEGS(reg)							\
-	reg = (reg | REG_NEGS_MASK)
-
-#define NOP_INST0 (						 \
-		(R300_ALU_OUTC_MAD) |				 \
-		(R300_ALU_ARGC_ZERO << R300_ALU_ARG0C_SHIFT) | \
-		(R300_ALU_ARGC_ZERO << R300_ALU_ARG1C_SHIFT) | \
-		(R300_ALU_ARGC_ZERO << R300_ALU_ARG2C_SHIFT))
-#define NOP_INST1 (					     \
-		((0 | SRC_CONST) << R300_ALU_SRC0C_SHIFT) | \
-		((0 | SRC_CONST) << R300_ALU_SRC1C_SHIFT) | \
-		((0 | SRC_CONST) << R300_ALU_SRC2C_SHIFT))
-#define NOP_INST2 ( \
-		(R300_ALU_OUTA_MAD) |				 \
-		(R300_ALU_ARGA_ZERO << R300_ALU_ARG0A_SHIFT) | \
-		(R300_ALU_ARGA_ZERO << R300_ALU_ARG1A_SHIFT) | \
-		(R300_ALU_ARGA_ZERO << R300_ALU_ARG2A_SHIFT))
-#define NOP_INST3 (					     \
-		((0 | SRC_CONST) << R300_ALU_SRC0A_SHIFT) | \
-		((0 | SRC_CONST) << R300_ALU_SRC1A_SHIFT) | \
-		((0 | SRC_CONST) << R300_ALU_SRC2A_SHIFT))
-
-
-/*
- * Datas structures for fragment program generation
- */
-
-/* description of r300 native hw instructions */
-static const struct {
-	const char *name;
-	int argc;
-	int v_op;
-	int s_op;
-} r300_fpop[] = {
-	/* *INDENT-OFF* */
-	{"MAD", 3, R300_ALU_OUTC_MAD, R300_ALU_OUTA_MAD},
-	{"DP3", 2, R300_ALU_OUTC_DP3, R300_ALU_OUTA_DP4},
-	{"DP4", 2, R300_ALU_OUTC_DP4, R300_ALU_OUTA_DP4},
-	{"MIN", 2, R300_ALU_OUTC_MIN, R300_ALU_OUTA_MIN},
-	{"MAX", 2, R300_ALU_OUTC_MAX, R300_ALU_OUTA_MAX},
-	{"CMP", 3, R300_ALU_OUTC_CMP, R300_ALU_OUTA_CMP},
-	{"FRC", 1, R300_ALU_OUTC_FRC, R300_ALU_OUTA_FRC},
-	{"EX2", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_EX2},
-	{"LG2", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_LG2},
-	{"RCP", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_RCP},
-	{"RSQ", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_RSQ},
-	{"REPL_ALPHA", 1, R300_ALU_OUTC_REPL_ALPHA, PFS_INVAL},
-	{"CMPH", 3, R300_ALU_OUTC_CMPH, PFS_INVAL},
-	/* *INDENT-ON* */
-};
-
-/* vector swizzles r300 can support natively, with a couple of
- * cases we handle specially
- *
- * REG_VSWZ/REG_SSWZ is an index into this table
- */
-
-/* mapping from SWIZZLE_* to r300 native values for scalar insns */
-#define SWIZZLE_HALF 6
-
-#define MAKE_SWZ3(x, y, z) (MAKE_SWIZZLE4(SWIZZLE_##x, \
-					  SWIZZLE_##y, \
-					  SWIZZLE_##z, \
-					  SWIZZLE_ZERO))
-/* native swizzles */
-static const struct r300_pfs_swizzle {
-	GLuint hash;		/* swizzle value this matches */
-	GLuint base;		/* base value for hw swizzle */
-	GLuint stride;		/* difference in base between arg0/1/2 */
-	GLuint flags;
-} v_swiz[] = {
-	/* *INDENT-OFF* */
-	{MAKE_SWZ3(X, Y, Z), R300_ALU_ARGC_SRC0C_XYZ, 4, SLOT_SRC_VECTOR},
-	{MAKE_SWZ3(X, X, X), R300_ALU_ARGC_SRC0C_XXX, 4, SLOT_SRC_VECTOR},
-	{MAKE_SWZ3(Y, Y, Y), R300_ALU_ARGC_SRC0C_YYY, 4, SLOT_SRC_VECTOR},
-	{MAKE_SWZ3(Z, Z, Z), R300_ALU_ARGC_SRC0C_ZZZ, 4, SLOT_SRC_VECTOR},
-	{MAKE_SWZ3(W, W, W), R300_ALU_ARGC_SRC0A, 1, SLOT_SRC_SCALAR},
-	{MAKE_SWZ3(Y, Z, X), R300_ALU_ARGC_SRC0C_YZX, 1, SLOT_SRC_VECTOR},
-	{MAKE_SWZ3(Z, X, Y), R300_ALU_ARGC_SRC0C_ZXY, 1, SLOT_SRC_VECTOR},
-	{MAKE_SWZ3(W, Z, Y), R300_ALU_ARGC_SRC0CA_WZY, 1, SLOT_SRC_BOTH},
-	{MAKE_SWZ3(ONE, ONE, ONE), R300_ALU_ARGC_ONE, 0, 0},
-	{MAKE_SWZ3(ZERO, ZERO, ZERO), R300_ALU_ARGC_ZERO, 0, 0},
-	{MAKE_SWZ3(HALF, HALF, HALF), R300_ALU_ARGC_HALF, 0, 0},
-	{PFS_INVAL, 0, 0, 0},
-	/* *INDENT-ON* */
-};
-
-/* used during matching of non-native swizzles */
-#define SWZ_X_MASK (7 << 0)
-#define SWZ_Y_MASK (7 << 3)
-#define SWZ_Z_MASK (7 << 6)
-#define SWZ_W_MASK (7 << 9)
-static const struct {
-	GLuint hash;		/* used to mask matching swizzle components */
-	int mask;		/* actual outmask */
-	int count;		/* count of components matched */
-} s_mask[] = {
-	/* *INDENT-OFF* */
-	{SWZ_X_MASK | SWZ_Y_MASK | SWZ_Z_MASK, 1 | 2 | 4, 3},
-	{SWZ_X_MASK | SWZ_Y_MASK, 1 | 2, 2},
-	{SWZ_X_MASK | SWZ_Z_MASK, 1 | 4, 2},
-	{SWZ_Y_MASK | SWZ_Z_MASK, 2 | 4, 2},
-	{SWZ_X_MASK, 1, 1},
-	{SWZ_Y_MASK, 2, 1},
-	{SWZ_Z_MASK, 4, 1},
-	{PFS_INVAL, PFS_INVAL, PFS_INVAL}
-	/* *INDENT-ON* */
-};
-
-static const struct {
-	int base;		/* hw value of swizzle */
-	int stride;		/* difference between SRC0/1/2 */
-	GLuint flags;
-} s_swiz[] = {
-	/* *INDENT-OFF* */
-	{R300_ALU_ARGA_SRC0C_X, 3, SLOT_SRC_VECTOR},
-	{R300_ALU_ARGA_SRC0C_Y, 3, SLOT_SRC_VECTOR},
-	{R300_ALU_ARGA_SRC0C_Z, 3, SLOT_SRC_VECTOR},
-	{R300_ALU_ARGA_SRC0A, 1, SLOT_SRC_SCALAR},
-	{R300_ALU_ARGA_ZERO, 0, 0},
-	{R300_ALU_ARGA_ONE, 0, 0},
-	{R300_ALU_ARGA_HALF, 0, 0}
-	/* *INDENT-ON* */
-};
-
-/* boiler-plate reg, for convenience */
-static const GLuint undef = REG(REG_TYPE_TEMP,
-				0,
-				SWIZZLE_XYZ,
-				SWIZZLE_W,
-				GL_FALSE,
-				GL_FALSE,
-				GL_FALSE);
-
-/* constant one source */
-static const GLuint pfs_one = REG(REG_TYPE_CONST,
-				  0,
-				  SWIZZLE_111,
-				  SWIZZLE_ONE,
-				  GL_FALSE,
-				  GL_TRUE,
-				  GL_TRUE);
-
-/* constant half source */
-static const GLuint pfs_half = REG(REG_TYPE_CONST,
-				   0,
-				   SWIZZLE_HHH,
-				   SWIZZLE_HALF,
-				   GL_FALSE,
-				   GL_TRUE,
-				   GL_TRUE);
-
-/* constant zero source */
-static const GLuint pfs_zero = REG(REG_TYPE_CONST,
-				   0,
-				   SWIZZLE_000,
-				   SWIZZLE_ZERO,
-				   GL_FALSE,
-				   GL_TRUE,
-				   GL_TRUE);
-
-/*
- * Common functions prototypes
- */
-static void dump_program(struct r300_fragment_program *fp,
-			 struct r300_fragment_program_code *code);
-static void emit_arith(struct r300_pfs_compile_state *cs, int op,
-		       GLuint dest, int mask,
-		       GLuint src0, GLuint src1, GLuint src2, int flags);
-
-/**
- * Get an R300 temporary that can be written to in the given slot.
- */
-static int get_hw_temp(struct r300_pfs_compile_state *cs, int slot)
-{
-	COMPILE_STATE;
-	int r;
-
-	for (r = 0; r < PFS_NUM_TEMP_REGS; ++r) {
-		if (cs->hwtemps[r].free >= 0 && cs->hwtemps[r].free <= slot)
-			break;
-	}
-
-	if (r >= PFS_NUM_TEMP_REGS) {
-		ERROR("Out of hardware temps\n");
-		return 0;
-	}
-	// Reserved is used to avoid the following scenario:
-	//  R300 temporary X is first assigned to Mesa temporary Y during vector ops
-	//  R300 temporary X is then assigned to Mesa temporary Z for further vector ops
-	//  Then scalar ops on Mesa temporary Z are emitted and move back in time
-	//  to overwrite the value of temporary Y.
-	// End scenario.
-	cs->hwtemps[r].reserved = cs->hwtemps[r].free;
-	cs->hwtemps[r].free = -1;
-
-	// Reset to some value that won't mess things up when the user
-	// tries to read from a temporary that hasn't been assigned a value yet.
-	// In the normal case, vector_valid and scalar_valid should be set to
-	// a sane value by the first emit that writes to this temporary.
-	cs->hwtemps[r].vector_valid = 0;
-	cs->hwtemps[r].scalar_valid = 0;
-
-	if (r > code->max_temp_idx)
-		code->max_temp_idx = r;
-
-	return r;
-}
-
-/**
- * Get an R300 temporary that will act as a TEX destination register.
- */
-static int get_hw_temp_tex(struct r300_pfs_compile_state *cs)
-{
-	COMPILE_STATE;
-	int r;
-
-	for (r = 0; r < PFS_NUM_TEMP_REGS; ++r) {
-		if (cs->used_in_node & (1 << r))
-			continue;
-
-		// Note: Be very careful here
-		if (cs->hwtemps[r].free >= 0 && cs->hwtemps[r].free <= 0)
-			break;
-	}
-
-	if (r >= PFS_NUM_TEMP_REGS)
-		return get_hw_temp(cs, 0);	/* Will cause an indirection */
-
-	cs->hwtemps[r].reserved = cs->hwtemps[r].free;
-	cs->hwtemps[r].free = -1;
-
-	// Reset to some value that won't mess things up when the user
-	// tries to read from a temporary that hasn't been assigned a value yet.
-	// In the normal case, vector_valid and scalar_valid should be set to
-	// a sane value by the first emit that writes to this temporary.
-	cs->hwtemps[r].vector_valid = cs->nrslots;
-	cs->hwtemps[r].scalar_valid = cs->nrslots;
-
-	if (r > code->max_temp_idx)
-		code->max_temp_idx = r;
-
-	return r;
-}
-
-/**
- * Mark the given hardware register as free.
- */
-static void free_hw_temp(struct r300_pfs_compile_state *cs, int idx)
-{
-	// Be very careful here. Consider sequences like
-	//  MAD r0, r1,r2,r3
-	//  TEX r4, ...
-	// The TEX instruction may be moved in front of the MAD instruction
-	// due to the way nodes work. We don't want to alias r1 and r4 in
-	// this case.
-	// I'm certain the register allocation could be further sanitized,
-	// but it's tricky because of stuff that can happen inside emit_tex
-	// and emit_arith.
-	cs->hwtemps[idx].free = cs->nrslots + 1;
-}
-
-/**
- * Create a new Mesa temporary register.
- */
-static GLuint get_temp_reg(struct r300_pfs_compile_state *cs)
-{
-	COMPILE_STATE;
-	GLuint r = undef;
-	GLuint index;
-
-	index = ffs(~cs->temp_in_use);
-	if (!index) {
-		ERROR("Out of program temps\n");
-		return r;
-	}
-
-	cs->temp_in_use |= (1 << --index);
-	cs->temps[index].refcount = 0xFFFFFFFF;
-	cs->temps[index].reg = -1;
-
-	REG_SET_TYPE(r, REG_TYPE_TEMP);
-	REG_SET_INDEX(r, index);
-	REG_SET_VALID(r, GL_TRUE);
-	return r;
-}
-
-/**
- * Create a new Mesa temporary register that will act as the destination
- * register for a texture read.
- */
-static GLuint get_temp_reg_tex(struct r300_pfs_compile_state *cs)
-{
-	COMPILE_STATE;
-	GLuint r = undef;
-	GLuint index;
-
-	index = ffs(~cs->temp_in_use);
-	if (!index) {
-		ERROR("Out of program temps\n");
-		return r;
-	}
-
-	cs->temp_in_use |= (1 << --index);
-	cs->temps[index].refcount = 0xFFFFFFFF;
-	cs->temps[index].reg = get_hw_temp_tex(cs);
-
-	REG_SET_TYPE(r, REG_TYPE_TEMP);
-	REG_SET_INDEX(r, index);
-	REG_SET_VALID(r, GL_TRUE);
-	return r;
-}
-
-/**
- * Free a Mesa temporary and the associated R300 temporary.
- */
-static void free_temp(struct r300_pfs_compile_state *cs, GLuint r)
-{
-	GLuint index = REG_GET_INDEX(r);
-
-	if (!(cs->temp_in_use & (1 << index)))
-		return;
-
-	if (REG_GET_TYPE(r) == REG_TYPE_TEMP) {
-		free_hw_temp(cs, cs->temps[index].reg);
-		cs->temps[index].reg = -1;
-		cs->temp_in_use &= ~(1 << index);
-	} else if (REG_GET_TYPE(r) == REG_TYPE_INPUT) {
-		free_hw_temp(cs, cs->inputs[index].reg);
-		cs->inputs[index].reg = -1;
-	}
-}
-
-/**
- * Emit a hardware constant/parameter.
- *
- * \p cp Stable pointer to an array of 4 floats.
- *  The pointer must be stable in the sense that it remains to be valid
- *  and hold the contents of the constant/parameter throughout the lifetime
- *  of the fragment program (actually, up until the next time the fragment
- *  program is translated).
- */
-static GLuint emit_const4fv(struct r300_pfs_compile_state *cs,
-			    const GLfloat * cp)
-{
-	COMPILE_STATE;
-	GLuint reg = undef;
-	int index;
 
-	for (index = 0; index < code->const_nr; ++index) {
-		if (code->constant[index] == cp)
-			break;
-	}
-
-	if (index >= code->const_nr) {
-		if (index >= PFS_NUM_CONST_REGS) {
-			ERROR("Out of hw constants!\n");
-			return reg;
-		}
-
-		code->const_nr++;
-		code->constant[index] = cp;
-	}
-
-	REG_SET_TYPE(reg, REG_TYPE_CONST);
-	REG_SET_INDEX(reg, index);
-	REG_SET_VALID(reg, GL_TRUE);
-	return reg;
-}
-
-static inline GLuint negate(GLuint r)
-{
-	REG_NEGS(r);
-	REG_NEGV(r);
-	return r;
-}
-
-/* Hack, to prevent clobbering sources used multiple times when
- * emulating non-native instructions
- */
-static inline GLuint keep(GLuint r)
-{
-	REG_SET_NO_USE(r, GL_TRUE);
-	return r;
-}
-
-static inline GLuint absolute(GLuint r)
-{
-	REG_ABS(r);
-	return r;
-}
-
-static int swz_native(struct r300_pfs_compile_state *cs,
-		      GLuint src, GLuint * r, GLuint arbneg)
-{
-	COMPILE_STATE;
-
-	/* Native swizzle, handle negation */
-	src = (src & ~REG_NEGS_MASK) | (((arbneg >> 3) & 1) << REG_NEGS_SHIFT);
-
-	if ((arbneg & 0x7) == 0x0) {
-		src = src & ~REG_NEGV_MASK;
-		*r = src;
-	} else if ((arbneg & 0x7) == 0x7) {
-		src |= REG_NEGV_MASK;
-		*r = src;
-	} else {
-		if (!REG_GET_VALID(*r))
-			*r = get_temp_reg(cs);
-		src |= REG_NEGV_MASK;
-		emit_arith(cs,
-			   PFS_OP_MAD,
-			   *r, arbneg & 0x7, keep(src), pfs_one, pfs_zero, 0);
-		src = src & ~REG_NEGV_MASK;
-		emit_arith(cs,
-			   PFS_OP_MAD,
-			   *r,
-			   (arbneg ^ 0x7) | WRITEMASK_W,
-			   src, pfs_one, pfs_zero, 0);
-	}
-
-	return 3;
-}
-
-static int swz_emit_partial(struct r300_pfs_compile_state *cs,
-			    GLuint src,
-			    GLuint * r, int mask, int mc, GLuint arbneg)
-{
-	COMPILE_STATE;
-	GLuint tmp;
-	GLuint wmask = 0;
-
-	if (!REG_GET_VALID(*r))
-		*r = get_temp_reg(cs);
-
-	/* A partial match, VSWZ/mask define what parts of the
-	 * desired swizzle we match
-	 */
-	if (mc + s_mask[mask].count == 3) {
-		wmask = WRITEMASK_W;
-		src |= ((arbneg >> 3) & 1) << REG_NEGS_SHIFT;
-	}
-
-	tmp = arbneg & s_mask[mask].mask;
-	if (tmp) {
-		tmp = tmp ^ s_mask[mask].mask;
-		if (tmp) {
-			emit_arith(cs,
-				   PFS_OP_MAD,
-				   *r,
-				   arbneg & s_mask[mask].mask,
-				   keep(src) | REG_NEGV_MASK,
-				   pfs_one, pfs_zero, 0);
-			if (!wmask) {
-				REG_SET_NO_USE(src, GL_TRUE);
-			} else {
-				REG_SET_NO_USE(src, GL_FALSE);
-			}
-			emit_arith(cs,
-				   PFS_OP_MAD,
-				   *r, tmp | wmask, src, pfs_one, pfs_zero, 0);
-		} else {
-			if (!wmask) {
-				REG_SET_NO_USE(src, GL_TRUE);
-			} else {
-				REG_SET_NO_USE(src, GL_FALSE);
-			}
-			emit_arith(cs,
-				   PFS_OP_MAD,
-				   *r,
-				   (arbneg & s_mask[mask].mask) | wmask,
-				   src | REG_NEGV_MASK, pfs_one, pfs_zero, 0);
-		}
-	} else {
-		if (!wmask) {
-			REG_SET_NO_USE(src, GL_TRUE);
-		} else {
-			REG_SET_NO_USE(src, GL_FALSE);
-		}
-		emit_arith(cs, PFS_OP_MAD,
-			   *r,
-			   s_mask[mask].mask | wmask,
-			   src, pfs_one, pfs_zero, 0);
-	}
-
-	return s_mask[mask].count;
-}
-
-static GLuint do_swizzle(struct r300_pfs_compile_state *cs,
-			 GLuint src, GLuint arbswz, GLuint arbneg)
-{
-	COMPILE_STATE;
-	GLuint r = undef;
-	GLuint vswz;
-	int c_mask = 0;
-	int v_match = 0;
-
-	/* If swizzling from something without an XYZW native swizzle,
-	 * emit result to a temp, and do new swizzle from the temp.
-	 */
-#if 0
-	if (REG_GET_VSWZ(src) != SWIZZLE_XYZ || REG_GET_SSWZ(src) != SWIZZLE_W) {
-		GLuint temp = get_temp_reg(fp);
-		emit_arith(fp,
-			   PFS_OP_MAD,
-			   temp, WRITEMASK_XYZW, src, pfs_one, pfs_zero, 0);
-		src = temp;
-	}
-#endif
-
-	if (REG_GET_VSWZ(src) != SWIZZLE_XYZ || REG_GET_SSWZ(src) != SWIZZLE_W) {
-		GLuint vsrcswz =
-		    (v_swiz[REG_GET_VSWZ(src)].
-		     hash & (SWZ_X_MASK | SWZ_Y_MASK | SWZ_Z_MASK)) |
-		    REG_GET_SSWZ(src) << 9;
-		GLint i;
-
-		GLuint newswz = 0;
-		GLuint offset;
-		for (i = 0; i < 4; ++i) {
-			offset = GET_SWZ(arbswz, i);
-
-			newswz |=
-			    (offset <= 3) ? GET_SWZ(vsrcswz,
-						    offset) << i *
-			    3 : offset << i * 3;
-		}
-
-		arbswz = newswz & (SWZ_X_MASK | SWZ_Y_MASK | SWZ_Z_MASK);
-		REG_SET_SSWZ(src, GET_SWZ(newswz, 3));
-	} else {
-		/* set scalar swizzling */
-		REG_SET_SSWZ(src, GET_SWZ(arbswz, 3));
-
-	}
-	do {
-		vswz = REG_GET_VSWZ(src);
-		do {
-			int chash;
-
-			REG_SET_VSWZ(src, vswz);
-			chash = v_swiz[REG_GET_VSWZ(src)].hash &
-			    s_mask[c_mask].hash;
-
-			if (chash == (arbswz & s_mask[c_mask].hash)) {
-				if (s_mask[c_mask].count == 3) {
-					v_match += swz_native(cs,
-							      src, &r, arbneg);
-				} else {
-					v_match += swz_emit_partial(cs,
-								    src,
-								    &r,
-								    c_mask,
-								    v_match,
-								    arbneg);
-				}
-
-				if (v_match == 3)
-					return r;
-
-				/* Fill with something invalid.. all 0's was
-				 * wrong before, matched SWIZZLE_X.  So all
-				 * 1's will be okay for now
-				 */
-				arbswz |= (PFS_INVAL & s_mask[c_mask].hash);
-			}
-		} while (v_swiz[++vswz].hash != PFS_INVAL);
-		REG_SET_VSWZ(src, SWIZZLE_XYZ);
-	} while (s_mask[++c_mask].hash != PFS_INVAL);
-
-	ERROR("should NEVER get here\n");
-	return r;
-}
-
-static GLuint t_src(struct r300_pfs_compile_state *cs,
-		    struct prog_src_register fpsrc)
-{
-	COMPILE_STATE;
-	GLuint r = undef;
-
-	switch (fpsrc.File) {
-	case PROGRAM_TEMPORARY:
-		REG_SET_INDEX(r, fpsrc.Index);
-		REG_SET_VALID(r, GL_TRUE);
-		REG_SET_TYPE(r, REG_TYPE_TEMP);
-		break;
-	case PROGRAM_INPUT:
-		REG_SET_INDEX(r, fpsrc.Index);
-		REG_SET_VALID(r, GL_TRUE);
-		REG_SET_TYPE(r, REG_TYPE_INPUT);
-		break;
-	case PROGRAM_LOCAL_PARAM:
-		r = emit_const4fv(cs,
-				  fp->mesa_program.Base.LocalParams[fpsrc.
-								    Index]);
-		break;
-	case PROGRAM_ENV_PARAM:
-		r = emit_const4fv(cs,
-			cs->r300->radeon.glCtx->FragmentProgram.Parameters[fpsrc.Index]);
-		break;
-	case PROGRAM_STATE_VAR:
-	case PROGRAM_NAMED_PARAM:
-	case PROGRAM_CONSTANT:
-		r = emit_const4fv(cs,
-				  fp->mesa_program.Base.Parameters->
-				  ParameterValues[fpsrc.Index]);
-		break;
-	default:
-		ERROR("unknown SrcReg->File %x\n", fpsrc.File);
-		return r;
-	}
-
-	/* no point swizzling ONE/ZERO/HALF constants... */
-	if (REG_GET_VSWZ(r) < SWIZZLE_111 || REG_GET_SSWZ(r) < SWIZZLE_ZERO)
-		r = do_swizzle(cs, r, fpsrc.Swizzle, fpsrc.NegateBase);
-	return r;
-}
-
-static GLuint t_scalar_src(struct r300_pfs_compile_state *cs,
-			   struct prog_src_register fpsrc)
-{
-	struct prog_src_register src = fpsrc;
-	int sc = GET_SWZ(fpsrc.Swizzle, 0);	/* X */
-
-	src.Swizzle = ((sc << 0) | (sc << 3) | (sc << 6) | (sc << 9));
-
-	return t_src(cs, src);
-}
-
-static GLuint t_dst(struct r300_pfs_compile_state *cs,
-		    struct prog_dst_register dest)
-{
-	COMPILE_STATE;
-	GLuint r = undef;
-
-	switch (dest.File) {
-	case PROGRAM_TEMPORARY:
-		REG_SET_INDEX(r, dest.Index);
-		REG_SET_VALID(r, GL_TRUE);
-		REG_SET_TYPE(r, REG_TYPE_TEMP);
-		return r;
-	case PROGRAM_OUTPUT:
-		REG_SET_TYPE(r, REG_TYPE_OUTPUT);
-		switch (dest.Index) {
-		case FRAG_RESULT_COLR:
-		case FRAG_RESULT_DEPR:
-			REG_SET_INDEX(r, dest.Index);
-			REG_SET_VALID(r, GL_TRUE);
-			return r;
-		default:
-			ERROR("Bad DstReg->Index 0x%x\n", dest.Index);
-			return r;
-		}
-	default:
-		ERROR("Bad DstReg->File 0x%x\n", dest.File);
-		return r;
-	}
-}
-
-static int t_hw_src(struct r300_pfs_compile_state *cs, GLuint src, GLboolean tex)
-{
-	COMPILE_STATE;
-	int idx;
-	int index = REG_GET_INDEX(src);
-
-	switch (REG_GET_TYPE(src)) {
-	case REG_TYPE_TEMP:
-		/* NOTE: if reg==-1 here, a source is being read that
-		 *       hasn't been written to. Undefined results.
-		 */
-		if (cs->temps[index].reg == -1)
-			cs->temps[index].reg = get_hw_temp(cs, cs->nrslots);
-
-		idx = cs->temps[index].reg;
-
-		if (!REG_GET_NO_USE(src) && (--cs->temps[index].refcount == 0))
-			free_temp(cs, src);
-		break;
-	case REG_TYPE_INPUT:
-		idx = cs->inputs[index].reg;
-
-		if (!REG_GET_NO_USE(src) && (--cs->inputs[index].refcount == 0))
-			free_hw_temp(cs, cs->inputs[index].reg);
-		break;
-	case REG_TYPE_CONST:
-		return (index | SRC_CONST);
-	default:
-		ERROR("Invalid type for source reg\n");
-		return (0 | SRC_CONST);
-	}
-
-	if (!tex)
-		cs->used_in_node |= (1 << idx);
-
-	return idx;
-}
-
-static int t_hw_dst(struct r300_pfs_compile_state *cs,
-		    GLuint dest, GLboolean tex, int slot)
-{
-	COMPILE_STATE;
-	int idx;
-	GLuint index = REG_GET_INDEX(dest);
-	assert(REG_GET_VALID(dest));
-
-	switch (REG_GET_TYPE(dest)) {
-	case REG_TYPE_TEMP:
-		if (cs->temps[REG_GET_INDEX(dest)].reg == -1) {
-			if (!tex) {
-				cs->temps[index].reg = get_hw_temp(cs, slot);
-			} else {
-				cs->temps[index].reg = get_hw_temp_tex(cs);
-			}
-		}
-		idx = cs->temps[index].reg;
-
-		if (!REG_GET_NO_USE(dest) && (--cs->temps[index].refcount == 0))
-			free_temp(cs, dest);
-
-		cs->dest_in_node |= (1 << idx);
-		cs->used_in_node |= (1 << idx);
-		break;
-	case REG_TYPE_OUTPUT:
-		switch (index) {
-		case FRAG_RESULT_COLR:
-			code->node[code->cur_node].flags |= R300_RGBA_OUT;
-			break;
-		case FRAG_RESULT_DEPR:
-			fp->WritesDepth = GL_TRUE;
-			code->node[code->cur_node].flags |= R300_W_OUT;
-			break;
-		}
-		return index;
-		break;
-	default:
-		ERROR("invalid dest reg type %d\n", REG_GET_TYPE(dest));
-		return 0;
-	}
-
-	return idx;
-}
-
-static void emit_nop(struct r300_pfs_compile_state *cs)
-{
-	COMPILE_STATE;
-
-	if (cs->nrslots >= PFS_MAX_ALU_INST) {
-		ERROR("Out of ALU instruction slots\n");
-		return;
-	}
-
-	code->alu.inst[cs->nrslots].inst0 = NOP_INST0;
-	code->alu.inst[cs->nrslots].inst1 = NOP_INST1;
-	code->alu.inst[cs->nrslots].inst2 = NOP_INST2;
-	code->alu.inst[cs->nrslots].inst3 = NOP_INST3;
-	cs->nrslots++;
-}
-
-static void emit_tex(struct r300_pfs_compile_state *cs,
-		     struct prog_instruction *fpi, int opcode)
+static void update_params(r300ContextPtr r300, struct r300_fragment_program *fp)
 {
-	COMPILE_STATE;
-	GLuint coord = t_src(cs, fpi->SrcReg[0]);
-	GLuint dest = undef, rdest = undef;
-	GLuint din, uin;
-	int unit = fpi->TexSrcUnit;
-	int hwsrc, hwdest;
-	GLuint tempreg = 0;
-
-	/**
-	 * Hardware uses [0..1]x[0..1] range for rectangle textures
-	 * instead of [0..Width]x[0..Height].
-	 * Add a scaling instruction.
-	 *
-	 * \todo Refactor this once we have proper rewriting/optimization
-	 * support for programs.
-	 */
-	if (opcode != R300_TEX_OP_KIL && fpi->TexSrcTarget == TEXTURE_RECT_INDEX) {
-		gl_state_index tokens[STATE_LENGTH] = {
-			STATE_INTERNAL, STATE_R300_TEXRECT_FACTOR, 0, 0,
-			0
-		};
-		int factor_index;
-		GLuint factorreg;
-
-		tokens[2] = unit;
-		factor_index =
-			_mesa_add_state_reference(fp->mesa_program.Base.
-						Parameters, tokens);
-		factorreg =
-			emit_const4fv(cs,
-				fp->mesa_program.Base.Parameters->
-				ParameterValues[factor_index]);
-		tempreg = keep(get_temp_reg(cs));
-
-		emit_arith(cs, PFS_OP_MAD, tempreg, WRITEMASK_XYZW,
-			coord, factorreg, pfs_zero, 0);
-
-		coord = tempreg;
-	}
-
-	/* Texture operations do not support swizzles etc. in hardware,
-	 * so emit an additional arithmetic operation if necessary.
-	 */
-	if (REG_GET_VSWZ(coord) != SWIZZLE_XYZ ||
-	    REG_GET_SSWZ(coord) != SWIZZLE_W ||
-	    coord & (REG_NEGV_MASK | REG_NEGS_MASK | REG_ABS_MASK)) {
-		assert(tempreg == 0);
-		tempreg = keep(get_temp_reg(cs));
-		emit_arith(cs, PFS_OP_MAD, tempreg, WRITEMASK_XYZW,
-			coord, pfs_one, pfs_zero, 0);
-		coord = tempreg;
-	}
-
-	/* Ensure correct node indirection */
-	uin = cs->used_in_node;
-	din = cs->dest_in_node;
-
-	/* Resolve source/dest to hardware registers */
-	hwsrc = t_hw_src(cs, coord, GL_TRUE);
-
-	if (opcode != R300_TEX_OP_KIL) {
-		dest = t_dst(cs, fpi->DstReg);
-
-		/* r300 doesn't seem to be able to do TEX->output reg */
-		if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
-			rdest = dest;
-			dest = get_temp_reg_tex(cs);
-		} else if (fpi->DstReg.WriteMask != WRITEMASK_XYZW) {
-			/* in case write mask isn't XYZW */
-			rdest = dest;
-			dest = get_temp_reg_tex(cs);
-		}
-		hwdest =
-		    t_hw_dst(cs, dest, GL_TRUE,
-			     code->node[code->cur_node].alu_offset);
-
-		/* Use a temp that hasn't been used in this node, rather
-		 * than causing an indirection
-		 */
-		if (uin & (1 << hwdest)) {
-			free_hw_temp(cs, hwdest);
-			hwdest = get_hw_temp_tex(cs);
-			cs->temps[REG_GET_INDEX(dest)].reg = hwdest;
-		}
-	} else {
-		hwdest = 0;
-		unit = 0;
-	}
-
-	/* Indirection if source has been written in this node, or if the
-	 * dest has been read/written in this node
-	 */
-	if ((REG_GET_TYPE(coord) != REG_TYPE_CONST &&
-	     (din & (1 << hwsrc))) || (uin & (1 << hwdest))) {
-
-		/* Finish off current node */
-		if (code->node[code->cur_node].alu_offset == cs->nrslots)
-			emit_nop(cs);
-
-		code->node[code->cur_node].alu_end =
-		    cs->nrslots - code->node[code->cur_node].alu_offset - 1;
-		assert(code->node[code->cur_node].alu_end >= 0);
-
-		if (++code->cur_node >= PFS_MAX_TEX_INDIRECT) {
-			ERROR("too many levels of texture indirection\n");
-			return;
-		}
-
-		/* Start new node */
-		code->node[code->cur_node].tex_offset = code->tex.length;
-		code->node[code->cur_node].alu_offset = cs->nrslots;
-		code->node[code->cur_node].tex_end = -1;
-		code->node[code->cur_node].alu_end = -1;
-		code->node[code->cur_node].flags = 0;
-		cs->used_in_node = 0;
-		cs->dest_in_node = 0;
-	}
-
-	if (code->cur_node == 0)
-		code->first_node_has_tex = 1;
-
-	code->tex.inst[code->tex.length++] = 0 | (hwsrc << R300_SRC_ADDR_SHIFT)
-	    | (hwdest << R300_DST_ADDR_SHIFT)
-	    | (unit << R300_TEX_ID_SHIFT)
-	    | (opcode << R300_TEX_INST_SHIFT);
-
-	cs->dest_in_node |= (1 << hwdest);
-	if (REG_GET_TYPE(coord) != REG_TYPE_CONST)
-		cs->used_in_node |= (1 << hwsrc);
-
-	code->node[code->cur_node].tex_end++;
-
-	/* Copy from temp to output if needed */
-	if (REG_GET_VALID(rdest)) {
-		emit_arith(cs, PFS_OP_MAD, rdest, fpi->DstReg.WriteMask, dest,
-			   pfs_one, pfs_zero, 0);
-		free_temp(cs, dest);
-	}
+	struct gl_fragment_program *mp = &fp->mesa_program;
 
-	/* Free temp register */
-	if (tempreg != 0)
-		free_temp(cs, tempreg);
+	/* Ask Mesa nicely to fill in ParameterValues for us */
+	if (mp->Base.Parameters)
+		_mesa_load_state_parameters(r300->radeon.glCtx, mp->Base.Parameters);
 }
 
-/**
- * Returns the first slot where we could possibly allow writing to dest,
- * according to register allocation.
- */
-static int get_earliest_allowed_write(struct r300_pfs_compile_state *cs,
-				      GLuint dest, int mask)
-{
-	COMPILE_STATE;
-	int idx;
-	int pos;
-	GLuint index = REG_GET_INDEX(dest);
-	assert(REG_GET_VALID(dest));
-
-	switch (REG_GET_TYPE(dest)) {
-	case REG_TYPE_TEMP:
-		if (cs->temps[index].reg == -1)
-			return 0;
-
-		idx = cs->temps[index].reg;
-		break;
-	case REG_TYPE_OUTPUT:
-		return 0;
-	default:
-		ERROR("invalid dest reg type %d\n", REG_GET_TYPE(dest));
-		return 0;
-	}
-
-	pos = cs->hwtemps[idx].reserved;
-	if (mask & WRITEMASK_XYZ) {
-		if (pos < cs->hwtemps[idx].vector_lastread)
-			pos = cs->hwtemps[idx].vector_lastread;
-	}
-	if (mask & WRITEMASK_W) {
-		if (pos < cs->hwtemps[idx].scalar_lastread)
-			pos = cs->hwtemps[idx].scalar_lastread;
-	}
-
-	return pos;
-}
 
 /**
- * Allocates a slot for an ALU instruction that can consist of
- * a vertex part or a scalar part or both.
+ * Transform the program to support fragment.position.
  *
- * Sources from src (src[0] to src[argc-1]) are added to the slot in the
- * appropriate position (vector and/or scalar), and their positions are
- * recorded in the srcpos array.
+ * Introduce a small fragment at the start of the program that will be
+ * the only code that directly reads the FRAG_ATTRIB_WPOS input.
+ * All other code pieces that reference that input will be rewritten
+ * to read from a newly allocated temporary.
  *
- * This function emits instruction code for the source fetch and the
- * argument selection. It does not emit instruction code for the
- * opcode or the destination selection.
- *
- * @return the index of the slot
- */
-static int find_and_prepare_slot(struct r300_pfs_compile_state *cs,
-				 GLboolean emit_vop,
-				 GLboolean emit_sop,
-				 int argc, GLuint * src, GLuint dest, int mask)
-{
-	COMPILE_STATE;
-	int hwsrc[3];
-	int srcpos[3];
-	unsigned int used;
-	int tempused;
-	int tempvsrc[3];
-	int tempssrc[3];
-	int pos;
-	int regnr;
-	int i, j;
-
-	// Determine instruction slots, whether sources are required on
-	// vector or scalar side, and the smallest slot number where
-	// all source registers are available
-	used = 0;
-	if (emit_vop)
-		used |= SLOT_OP_VECTOR;
-	if (emit_sop)
-		used |= SLOT_OP_SCALAR;
-
-	pos = get_earliest_allowed_write(cs, dest, mask);
-
-	if (code->node[code->cur_node].alu_offset > pos)
-		pos = code->node[code->cur_node].alu_offset;
-	for (i = 0; i < argc; ++i) {
-		if (!REG_GET_BUILTIN(src[i])) {
-			if (emit_vop)
-				used |= v_swiz[REG_GET_VSWZ(src[i])].flags << i;
-			if (emit_sop)
-				used |= s_swiz[REG_GET_SSWZ(src[i])].flags << i;
-		}
-
-		hwsrc[i] = t_hw_src(cs, src[i], GL_FALSE);	/* Note: sideeffects wrt refcounting! */
-		regnr = hwsrc[i] & 31;
-
-		if (REG_GET_TYPE(src[i]) == REG_TYPE_TEMP) {
-			if (used & (SLOT_SRC_VECTOR << i)) {
-				if (cs->hwtemps[regnr].vector_valid > pos)
-					pos = cs->hwtemps[regnr].vector_valid;
-			}
-			if (used & (SLOT_SRC_SCALAR << i)) {
-				if (cs->hwtemps[regnr].scalar_valid > pos)
-					pos = cs->hwtemps[regnr].scalar_valid;
-			}
-		}
-	}
-
-	// Find a slot that fits
-	for (;; ++pos) {
-		if (cs->slot[pos].used & used & SLOT_OP_BOTH)
-			continue;
-
-		if (pos >= cs->nrslots) {
-			if (cs->nrslots >= PFS_MAX_ALU_INST) {
-				ERROR("Out of ALU instruction slots\n");
-				return -1;
-			}
-
-			code->alu.inst[pos].inst0 = NOP_INST0;
-			code->alu.inst[pos].inst1 = NOP_INST1;
-			code->alu.inst[pos].inst2 = NOP_INST2;
-			code->alu.inst[pos].inst3 = NOP_INST3;
-
-			cs->nrslots++;
-		}
-		// Note: When we need both parts (vector and scalar) of a source,
-		// we always try to put them into the same position. This makes the
-		// code easier to read, and it is optimal (i.e. one doesn't gain
-		// anything by splitting the parts).
-		// It also avoids headaches with swizzles that access both parts (i.e WXY)
-		tempused = cs->slot[pos].used;
-		for (i = 0; i < 3; ++i) {
-			tempvsrc[i] = cs->slot[pos].vsrc[i];
-			tempssrc[i] = cs->slot[pos].ssrc[i];
-		}
-
-		for (i = 0; i < argc; ++i) {
-			int flags = (used >> i) & SLOT_SRC_BOTH;
-
-			if (!flags) {
-				srcpos[i] = 0;
-				continue;
-			}
-
-			for (j = 0; j < 3; ++j) {
-				if ((tempused >> j) & flags & SLOT_SRC_VECTOR) {
-					if (tempvsrc[j] != hwsrc[i])
-						continue;
-				}
-
-				if ((tempused >> j) & flags & SLOT_SRC_SCALAR) {
-					if (tempssrc[j] != hwsrc[i])
-						continue;
-				}
-
-				break;
-			}
-
-			if (j == 3)
-				break;
-
-			srcpos[i] = j;
-			tempused |= flags << j;
-			if (flags & SLOT_SRC_VECTOR)
-				tempvsrc[j] = hwsrc[i];
-			if (flags & SLOT_SRC_SCALAR)
-				tempssrc[j] = hwsrc[i];
-		}
-
-		if (i == argc)
-			break;
-	}
-
-	// Found a slot, reserve it
-	cs->slot[pos].used = tempused | (used & SLOT_OP_BOTH);
-	for (i = 0; i < 3; ++i) {
-		cs->slot[pos].vsrc[i] = tempvsrc[i];
-		cs->slot[pos].ssrc[i] = tempssrc[i];
-	}
-
-	for (i = 0; i < argc; ++i) {
-		if (REG_GET_TYPE(src[i]) == REG_TYPE_TEMP) {
-			int regnr = hwsrc[i] & 31;
-
-			if (used & (SLOT_SRC_VECTOR << i)) {
-				if (cs->hwtemps[regnr].vector_lastread < pos)
-					cs->hwtemps[regnr].vector_lastread =
-					    pos;
-			}
-			if (used & (SLOT_SRC_SCALAR << i)) {
-				if (cs->hwtemps[regnr].scalar_lastread < pos)
-					cs->hwtemps[regnr].scalar_lastread =
-					    pos;
-			}
-		}
-	}
-
-	// Emit the source fetch code
-	code->alu.inst[pos].inst1 &= ~R300_ALU_SRC_MASK;
-	code->alu.inst[pos].inst1 |=
-	    ((cs->slot[pos].vsrc[0] << R300_ALU_SRC0C_SHIFT) |
-	     (cs->slot[pos].vsrc[1] << R300_ALU_SRC1C_SHIFT) |
-	     (cs->slot[pos].vsrc[2] << R300_ALU_SRC2C_SHIFT));
-
-	code->alu.inst[pos].inst3 &= ~R300_ALU_SRC_MASK;
-	code->alu.inst[pos].inst3 |=
-	    ((cs->slot[pos].ssrc[0] << R300_ALU_SRC0A_SHIFT) |
-	     (cs->slot[pos].ssrc[1] << R300_ALU_SRC1A_SHIFT) |
-	     (cs->slot[pos].ssrc[2] << R300_ALU_SRC2A_SHIFT));
-
-	// Emit the argument selection code
-	if (emit_vop) {
-		int swz[3];
-
-		for (i = 0; i < 3; ++i) {
-			if (i < argc) {
-				swz[i] = (v_swiz[REG_GET_VSWZ(src[i])].base +
-					  (srcpos[i] *
-					   v_swiz[REG_GET_VSWZ(src[i])].
-					   stride)) | ((src[i] & REG_NEGV_MASK)
-						       ? ARG_NEG : 0) | ((src[i]
-									  &
-									  REG_ABS_MASK)
-									 ?
-									 ARG_ABS
-									 : 0);
-			} else {
-				swz[i] = R300_ALU_ARGC_ZERO;
-			}
-		}
-
-		code->alu.inst[pos].inst0 &=
-		    ~(R300_ALU_ARG0C_MASK | R300_ALU_ARG1C_MASK |
-		      R300_ALU_ARG2C_MASK);
-		code->alu.inst[pos].inst0 |=
-		    (swz[0] << R300_ALU_ARG0C_SHIFT) | (swz[1] <<
-							 R300_ALU_ARG1C_SHIFT)
-		    | (swz[2] << R300_ALU_ARG2C_SHIFT);
-	}
-
-	if (emit_sop) {
-		int swz[3];
-
-		for (i = 0; i < 3; ++i) {
-			if (i < argc) {
-				swz[i] = (s_swiz[REG_GET_SSWZ(src[i])].base +
-					  (srcpos[i] *
-					   s_swiz[REG_GET_SSWZ(src[i])].
-					   stride)) | ((src[i] & REG_NEGV_MASK)
-						       ? ARG_NEG : 0) | ((src[i]
-									  &
-									  REG_ABS_MASK)
-									 ?
-									 ARG_ABS
-									 : 0);
-			} else {
-				swz[i] = R300_ALU_ARGA_ZERO;
-			}
-		}
-
-		code->alu.inst[pos].inst2 &=
-		    ~(R300_ALU_ARG0A_MASK | R300_ALU_ARG1A_MASK |
-		      R300_ALU_ARG2A_MASK);
-		code->alu.inst[pos].inst2 |=
-		    (swz[0] << R300_ALU_ARG0A_SHIFT) | (swz[1] <<
-							 R300_ALU_ARG1A_SHIFT)
-		    | (swz[2] << R300_ALU_ARG2A_SHIFT);
-	}
-
-	return pos;
-}
-
-/**
- * Append an ALU instruction to the instruction list.
+ * \todo if/when r5xx supports the radeon_program architecture, this is a
+ * likely candidate for code sharing.
  */
-static void emit_arith(struct r300_pfs_compile_state *cs,
-		       int op,
-		       GLuint dest,
-		       int mask,
-		       GLuint src0, GLuint src1, GLuint src2, int flags)
+static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler)
 {
-	COMPILE_STATE;
-	GLuint src[3] = { src0, src1, src2 };
-	int hwdest;
-	GLboolean emit_vop, emit_sop;
-	int vop, sop, argc;
-	int pos;
-
-	vop = r300_fpop[op].v_op;
-	sop = r300_fpop[op].s_op;
-	argc = r300_fpop[op].argc;
+	GLuint InputsRead = compiler->fp->mesa_program.Base.InputsRead;
 
-	if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT &&
-	    REG_GET_INDEX(dest) == FRAG_RESULT_DEPR) {
-		if (mask & WRITEMASK_Z) {
-			mask = WRITEMASK_W;
-		} else {
-			return;
-		}
-	}
-
-	emit_vop = GL_FALSE;
-	emit_sop = GL_FALSE;
-	if ((mask & WRITEMASK_XYZ) || vop == R300_ALU_OUTC_DP3)
-		emit_vop = GL_TRUE;
-	if ((mask & WRITEMASK_W) || vop == R300_ALU_OUTC_REPL_ALPHA)
-		emit_sop = GL_TRUE;
-
-	pos =
-	    find_and_prepare_slot(cs, emit_vop, emit_sop, argc, src, dest,
-				  mask);
-	if (pos < 0)
+	if (!(InputsRead & FRAG_BIT_WPOS))
 		return;
 
-	hwdest = t_hw_dst(cs, dest, GL_FALSE, pos);	/* Note: Side effects wrt register allocation */
-
-	if (flags & PFS_FLAG_SAT) {
-		vop |= R300_ALU_OUTC_CLAMP;
-		sop |= R300_ALU_OUTA_CLAMP;
-	}
-
-	/* Throw the pieces together and get ALU/1 */
-	if (emit_vop) {
-		code->alu.inst[pos].inst0 |= vop;
-
-		code->alu.inst[pos].inst1 |= hwdest << R300_ALU_DSTC_SHIFT;
-
-		if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
-			if (REG_GET_INDEX(dest) == FRAG_RESULT_COLR) {
-				code->alu.inst[pos].inst1 |=
-				    (mask & WRITEMASK_XYZ) <<
-				    R300_ALU_DSTC_OUTPUT_MASK_SHIFT;
-			} else
-				assert(0);
-		} else {
-			code->alu.inst[pos].inst1 |=
-			    (mask & WRITEMASK_XYZ) <<
-			    R300_ALU_DSTC_REG_MASK_SHIFT;
-
-			cs->hwtemps[hwdest].vector_valid = pos + 1;
-		}
-	}
-
-	/* And now ALU/3 */
-	if (emit_sop) {
-		code->alu.inst[pos].inst2 |= sop;
-
-		if (mask & WRITEMASK_W) {
-			if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
-				if (REG_GET_INDEX(dest) == FRAG_RESULT_COLR) {
-					code->alu.inst[pos].inst3 |=
-					    (hwdest << R300_ALU_DSTA_SHIFT) |
-					    R300_ALU_DSTA_OUTPUT;
-				} else if (REG_GET_INDEX(dest) ==
-					   FRAG_RESULT_DEPR) {
-					code->alu.inst[pos].inst3 |=
-					    R300_ALU_DSTA_DEPTH;
-				} else
-					assert(0);
-			} else {
-				code->alu.inst[pos].inst3 |=
-				    (hwdest << R300_ALU_DSTA_SHIFT) |
-				    R300_ALU_DSTA_REG;
-
-				cs->hwtemps[hwdest].scalar_valid = pos + 1;
-			}
-		}
-	}
-
-	return;
-}
-
-static GLfloat SinCosConsts[2][4] = {
-	{
-	 1.273239545,		// 4/PI
-	 -0.405284735,		// -4/(PI*PI)
-	 3.141592654,		// PI
-	 0.2225			// weight
-	 },
-	{
-	 0.75,
-	 0.0,
-	 0.159154943,		// 1/(2*PI)
-	 6.283185307		// 2*PI
-	 }
-};
-
-/**
- * Emit a LIT instruction.
- * \p flags may be PFS_FLAG_SAT
- *
- * Definition of LIT (from ARB_fragment_program):
- * tmp = VectorLoad(op0);
- * if (tmp.x < 0) tmp.x = 0;
- * if (tmp.y < 0) tmp.y = 0;
- * if (tmp.w < -(128.0-epsilon)) tmp.w = -(128.0-epsilon);
- * else if (tmp.w > 128-epsilon) tmp.w = 128-epsilon;
- * result.x = 1.0;
- * result.y = tmp.x;
- * result.z = (tmp.x > 0) ? RoughApproxPower(tmp.y, tmp.w) : 0.0;
- * result.w = 1.0;
- *
- * The longest path of computation is the one leading to result.z,
- * consisting of 5 operations. This implementation of LIT takes
- * 5 slots. So unless there's some special undocumented opcode,
- * this implementation is potentially optimal. Unfortunately,
- * emit_arith is a bit too conservative because it doesn't understand
- * partial writes to the vector component.
- */
-static const GLfloat LitConst[4] =
-    { 127.999999, 127.999999, 127.999999, -127.999999 };
-
-static void emit_lit(struct r300_pfs_compile_state *cs,
-		     GLuint dest, int mask, GLuint src, int flags)
-{
-	COMPILE_STATE;
-	GLuint cnst;
-	int needTemporary;
-	GLuint temp;
-
-	cnst = emit_const4fv(cs, LitConst);
-
-	needTemporary = 0;
-	if ((mask & WRITEMASK_XYZW) != WRITEMASK_XYZW) {
-		needTemporary = 1;
-	} else if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
-		// LIT is typically followed by DP3/DP4, so there's no point
-		// in creating special code for this case
-		needTemporary = 1;
-	}
-
-	if (needTemporary) {
-		temp = keep(get_temp_reg(cs));
-	} else {
-		temp = keep(dest);
-	}
-
-	// Note: The order of emit_arith inside the slots is relevant,
-	// because emit_arith only looks at scalar vs. vector when resolving
-	// dependencies, and it does not consider individual vector components,
-	// so swizzling between the two parts can create fake dependencies.
-
-	// First slot
-	emit_arith(cs, PFS_OP_MAX, temp, WRITEMASK_XY,
-		   keep(src), pfs_zero, undef, 0);
-	emit_arith(cs, PFS_OP_MAX, temp, WRITEMASK_W, src, cnst, undef, 0);
-
-	// Second slot
-	emit_arith(cs, PFS_OP_MIN, temp, WRITEMASK_Z,
-		   swizzle(temp, W, W, W, W), cnst, undef, 0);
-	emit_arith(cs, PFS_OP_LG2, temp, WRITEMASK_W,
-		   swizzle(temp, Y, Y, Y, Y), undef, undef, 0);
-
-	// Third slot
-	// If desired, we saturate the y result here.
-	// This does not affect the use as a condition variable in the CMP later
-	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_W,
-		   temp, swizzle(temp, Z, Z, Z, Z), pfs_zero, 0);
-	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_Y,
-		   swizzle(temp, X, X, X, X), pfs_one, pfs_zero, flags);
-
-	// Fourth slot
-	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_X,
-		   pfs_one, pfs_one, pfs_zero, 0);
-	emit_arith(cs, PFS_OP_EX2, temp, WRITEMASK_W, temp, undef, undef, 0);
-
-	// Fifth slot
-	emit_arith(cs, PFS_OP_CMP, temp, WRITEMASK_Z,
-		   pfs_zero, swizzle(temp, W, W, W, W),
-		   negate(swizzle(temp, Y, Y, Y, Y)), flags);
-	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_W, pfs_one, pfs_one,
-		   pfs_zero, 0);
-
-	if (needTemporary) {
-		emit_arith(cs, PFS_OP_MAD, dest, mask,
-			   temp, pfs_one, pfs_zero, flags);
-		free_temp(cs, temp);
-	} else {
-		// Decrease refcount of the destination
-		t_hw_dst(cs, dest, GL_FALSE, cs->nrslots);
-	}
-}
-
-static GLboolean parse_program(struct r300_pfs_compile_state *cs)
-{
-	COMPILE_STATE;
-	struct gl_fragment_program *mp = &fp->mesa_program;
-	const struct prog_instruction *inst = mp->Base.Instructions;
-	struct prog_instruction *fpi;
-	GLuint src[3], dest, temp[2];
-	int flags, mask = 0;
-	int const_sin[2];
-
-	if (!inst || inst[0].Opcode == OPCODE_END) {
-		ERROR("empty program?\n");
-		return GL_FALSE;
-	}
-
-	for (fpi = mp->Base.Instructions; fpi->Opcode != OPCODE_END; fpi++) {
-		if (fpi->SaturateMode == SATURATE_ZERO_ONE)
-			flags = PFS_FLAG_SAT;
-		else
-			flags = 0;
-
-		if (fpi->Opcode != OPCODE_KIL) {
-			dest = t_dst(cs, fpi->DstReg);
-			mask = fpi->DstReg.WriteMask;
-		}
-
-		switch (fpi->Opcode) {
-		case OPCODE_ABS:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   absolute(src[0]), pfs_one, pfs_zero, flags);
-			break;
-		case OPCODE_ADD:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], pfs_one, src[1], flags);
-			break;
-		case OPCODE_CMP:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			src[2] = t_src(cs, fpi->SrcReg[2]);
-			/* ARB_f_p - if src0.c < 0.0 ? src1.c : src2.c
-			 *    r300 - if src2.c < 0.0 ? src1.c : src0.c
-			 */
-			emit_arith(cs, PFS_OP_CMP, dest, mask,
-				   src[2], src[1], src[0], flags);
-			break;
-		case OPCODE_COS:
-			/*
-			 * cos using a parabola (see SIN):
-			 * cos(x):
-			 *   x = (x/(2*PI))+0.75
-			 *   x = frac(x)
-			 *   x = (x*2*PI)-PI
-			 *   result = sin(x)
-			 */
-			temp[0] = get_temp_reg(cs);
-			const_sin[0] = emit_const4fv(cs, SinCosConsts[0]);
-			const_sin[1] = emit_const4fv(cs, SinCosConsts[1]);
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-
-			/* add 0.5*PI and do range reduction */
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
-				   swizzle(src[0], X, X, X, X),
-				   swizzle(const_sin[1], Z, Z, Z, Z),
-				   swizzle(const_sin[1], X, X, X, X), 0);
-
-			emit_arith(cs, PFS_OP_FRC, temp[0], WRITEMASK_X,
-				   swizzle(temp[0], X, X, X, X),
-				   undef, undef, 0);
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Z, swizzle(temp[0], X, X, X, X), swizzle(const_sin[1], W, W, W, W),	//2*PI
-				   negate(swizzle(const_sin[0], Z, Z, Z, Z)),	//-PI
-				   0);
-
-			/* SIN */
-
-			emit_arith(cs, PFS_OP_MAD, temp[0],
-				   WRITEMASK_X | WRITEMASK_Y, swizzle(temp[0],
-								      Z, Z, Z,
-								      Z),
-				   const_sin[0], pfs_zero, 0);
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
-				   swizzle(temp[0], Y, Y, Y, Y),
-				   absolute(swizzle(temp[0], Z, Z, Z, Z)),
-				   swizzle(temp[0], X, X, X, X), 0);
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Y,
-				   swizzle(temp[0], X, X, X, X),
-				   absolute(swizzle(temp[0], X, X, X, X)),
-				   negate(swizzle(temp[0], X, X, X, X)), 0);
-
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   swizzle(temp[0], Y, Y, Y, Y),
-				   swizzle(const_sin[0], W, W, W, W),
-				   swizzle(temp[0], X, X, X, X), flags);
-
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_DP3:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_DP3, dest, mask,
-				   src[0], src[1], undef, flags);
-			break;
-		case OPCODE_DP4:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_DP4, dest, mask,
-				   src[0], src[1], undef, flags);
-			break;
-		case OPCODE_DPH:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			/* src0.xyz1 -> temp
-			 * DP4 dest, temp, src1
-			 */
-			emit_arith(cs, PFS_OP_DP4, dest, mask,
-				   swizzle(src[0], X, Y, Z, ONE), src[1],
-				   undef, flags);
-			break;
-		case OPCODE_DST:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			/* dest.y = src0.y * src1.y */
-			if (mask & WRITEMASK_Y)
-				emit_arith(cs, PFS_OP_MAD, dest, WRITEMASK_Y,
-					   keep(src[0]), keep(src[1]),
-					   pfs_zero, flags);
-			/* dest.z = src0.z */
-			if (mask & WRITEMASK_Z)
-				emit_arith(cs, PFS_OP_MAD, dest, WRITEMASK_Z,
-					   src[0], pfs_one, pfs_zero, flags);
-			/* result.x = 1.0
-			 * result.w = src1.w */
-			if (mask & WRITEMASK_XW) {
-				REG_SET_VSWZ(src[1], SWIZZLE_111);	/*Cheat */
-				emit_arith(cs, PFS_OP_MAD, dest,
-					   mask & WRITEMASK_XW,
-					   src[1], pfs_one, pfs_zero, flags);
-			}
-			break;
-		case OPCODE_EX2:
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_EX2, dest, mask,
-				   src[0], undef, undef, flags);
-			break;
-		case OPCODE_FLR:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			temp[0] = get_temp_reg(cs);
-			/* FRC temp, src0
-			 * MAD dest, src0, 1.0, -temp
-			 */
-			emit_arith(cs, PFS_OP_FRC, temp[0], mask,
-				   keep(src[0]), undef, undef, 0);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], pfs_one, negate(temp[0]), flags);
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_FRC:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_FRC, dest, mask,
-				   src[0], undef, undef, flags);
-			break;
-		case OPCODE_KIL:
-			emit_tex(cs, fpi, R300_TEX_OP_KIL);
-			break;
-		case OPCODE_LG2:
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_LG2, dest, mask,
-				   src[0], undef, undef, flags);
-			break;
-		case OPCODE_LIT:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			emit_lit(cs, dest, mask, src[0], flags);
-			break;
-		case OPCODE_LRP:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			src[2] = t_src(cs, fpi->SrcReg[2]);
-			/* result = tmp0tmp1 + (1 - tmp0)tmp2
-			 *        = tmp0tmp1 + tmp2 + (-tmp0)tmp2
-			 *     MAD temp, -tmp0, tmp2, tmp2
-			 *     MAD result, tmp0, tmp1, temp
-			 */
-			temp[0] = get_temp_reg(cs);
-			emit_arith(cs, PFS_OP_MAD, temp[0], mask,
-				   negate(keep(src[0])), keep(src[2]), src[2],
-				   0);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], src[1], temp[0], flags);
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_MAD:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			src[2] = t_src(cs, fpi->SrcReg[2]);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], src[1], src[2], flags);
-			break;
-		case OPCODE_MAX:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_MAX, dest, mask,
-				   src[0], src[1], undef, flags);
-			break;
-		case OPCODE_MIN:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_MIN, dest, mask,
-				   src[0], src[1], undef, flags);
-			break;
-		case OPCODE_MOV:
-		case OPCODE_SWZ:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], pfs_one, pfs_zero, flags);
-			break;
-		case OPCODE_MUL:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], src[1], pfs_zero, flags);
-			break;
-		case OPCODE_POW:
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-			src[1] = t_scalar_src(cs, fpi->SrcReg[1]);
-			temp[0] = get_temp_reg(cs);
-			emit_arith(cs, PFS_OP_LG2, temp[0], WRITEMASK_W,
-				   src[0], undef, undef, 0);
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_W,
-				   temp[0], src[1], pfs_zero, 0);
-			emit_arith(cs, PFS_OP_EX2, dest, fpi->DstReg.WriteMask,
-				   temp[0], undef, undef, 0);
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_RCP:
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_RCP, dest, mask,
-				   src[0], undef, undef, flags);
-			break;
-		case OPCODE_RSQ:
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-			emit_arith(cs, PFS_OP_RSQ, dest, mask,
-				   absolute(src[0]), pfs_zero, pfs_zero, flags);
-			break;
-		case OPCODE_SCS:
-			/*
-			 * scs using a parabola :
-			 * scs(x):
-			 *   result.x = sin(-abs(x)+0.5*PI)  (cos)
-			 *   result.y = sin(x)               (sin)
-			 *
-			 */
-			temp[0] = get_temp_reg(cs);
-			temp[1] = get_temp_reg(cs);
-			const_sin[0] = emit_const4fv(cs, SinCosConsts[0]);
-			const_sin[1] = emit_const4fv(cs, SinCosConsts[1]);
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-
-			/* x = -abs(x)+0.5*PI */
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Z, swizzle(const_sin[0], Z, Z, Z, Z),	//PI
-				   pfs_half,
-				   negate(abs
-					  (swizzle(keep(src[0]), X, X, X, X))),
-				   0);
-
-			/* C*x (sin) */
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_W,
-				   swizzle(const_sin[0], Y, Y, Y, Y),
-				   swizzle(keep(src[0]), X, X, X, X),
-				   pfs_zero, 0);
-
-			/* B*x, C*x (cos) */
-			emit_arith(cs, PFS_OP_MAD, temp[0],
-				   WRITEMASK_X | WRITEMASK_Y, swizzle(temp[0],
-								      Z, Z, Z,
-								      Z),
-				   const_sin[0], pfs_zero, 0);
-
-			/* B*x (sin) */
-			emit_arith(cs, PFS_OP_MAD, temp[1], WRITEMASK_W,
-				   swizzle(const_sin[0], X, X, X, X),
-				   keep(src[0]), pfs_zero, 0);
-
-			/* y = B*x + C*x*abs(x) (sin) */
-			emit_arith(cs, PFS_OP_MAD, temp[1], WRITEMASK_Z,
-				   absolute(src[0]),
-				   swizzle(temp[0], W, W, W, W),
-				   swizzle(temp[1], W, W, W, W), 0);
-
-			/* y = B*x + C*x*abs(x) (cos) */
-			emit_arith(cs, PFS_OP_MAD, temp[1], WRITEMASK_W,
-				   swizzle(temp[0], Y, Y, Y, Y),
-				   absolute(swizzle(temp[0], Z, Z, Z, Z)),
-				   swizzle(temp[0], X, X, X, X), 0);
-
-			/* y*abs(y) - y (cos), y*abs(y) - y (sin) */
-			emit_arith(cs, PFS_OP_MAD, temp[0],
-				   WRITEMASK_X | WRITEMASK_Y, swizzle(temp[1],
-								      W, Z, Y,
-								      X),
-				   absolute(swizzle(temp[1], W, Z, Y, X)),
-				   negate(swizzle(temp[1], W, Z, Y, X)), 0);
-
-			/* dest.xy = mad(temp.xy, P, temp2.wz) */
-			emit_arith(cs, PFS_OP_MAD, dest,
-				   mask & (WRITEMASK_X | WRITEMASK_Y), temp[0],
-				   swizzle(const_sin[0], W, W, W, W),
-				   swizzle(temp[1], W, Z, Y, X), flags);
-
-			free_temp(cs, temp[0]);
-			free_temp(cs, temp[1]);
-			break;
-		case OPCODE_SGE:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			temp[0] = get_temp_reg(cs);
-			/* temp = src0 - src1
-			 * dest.c = (temp.c < 0.0) ? 0 : 1
-			 */
-			emit_arith(cs, PFS_OP_MAD, temp[0], mask,
-				   src[0], pfs_one, negate(src[1]), 0);
-			emit_arith(cs, PFS_OP_CMP, dest, mask,
-				   pfs_one, pfs_zero, temp[0], 0);
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_SIN:
-			/*
-			 *  using a parabola:
-			 * sin(x) = 4/pi * x + -4/(pi*pi) * x * abs(x)
-			 * extra precision is obtained by weighting against
-			 * itself squared.
-			 */
-
-			temp[0] = get_temp_reg(cs);
-			const_sin[0] = emit_const4fv(cs, SinCosConsts[0]);
-			const_sin[1] = emit_const4fv(cs, SinCosConsts[1]);
-			src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
-
-			/* do range reduction */
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
-				   swizzle(keep(src[0]), X, X, X, X),
-				   swizzle(const_sin[1], Z, Z, Z, Z),
-				   pfs_half, 0);
-
-			emit_arith(cs, PFS_OP_FRC, temp[0], WRITEMASK_X,
-				   swizzle(temp[0], X, X, X, X),
-				   undef, undef, 0);
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Z, swizzle(temp[0], X, X, X, X), swizzle(const_sin[1], W, W, W, W),	//2*PI
-				   negate(swizzle(const_sin[0], Z, Z, Z, Z)),	//PI
-				   0);
-
-			/* SIN */
-
-			emit_arith(cs, PFS_OP_MAD, temp[0],
-				   WRITEMASK_X | WRITEMASK_Y, swizzle(temp[0],
-								      Z, Z, Z,
-								      Z),
-				   const_sin[0], pfs_zero, 0);
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
-				   swizzle(temp[0], Y, Y, Y, Y),
-				   absolute(swizzle(temp[0], Z, Z, Z, Z)),
-				   swizzle(temp[0], X, X, X, X), 0);
-
-			emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Y,
-				   swizzle(temp[0], X, X, X, X),
-				   absolute(swizzle(temp[0], X, X, X, X)),
-				   negate(swizzle(temp[0], X, X, X, X)), 0);
-
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   swizzle(temp[0], Y, Y, Y, Y),
-				   swizzle(const_sin[0], W, W, W, W),
-				   swizzle(temp[0], X, X, X, X), flags);
-
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_SLT:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			temp[0] = get_temp_reg(cs);
-			/* temp = src0 - src1
-			 * dest.c = (temp.c < 0.0) ? 1 : 0
-			 */
-			emit_arith(cs, PFS_OP_MAD, temp[0], mask,
-				   src[0], pfs_one, negate(src[1]), 0);
-			emit_arith(cs, PFS_OP_CMP, dest, mask,
-				   pfs_zero, pfs_one, temp[0], 0);
-			free_temp(cs, temp[0]);
-			break;
-		case OPCODE_SUB:
-			src[0] = t_src(cs, fpi->SrcReg[0]);
-			src[1] = t_src(cs, fpi->SrcReg[1]);
-			emit_arith(cs, PFS_OP_MAD, dest, mask,
-				   src[0], pfs_one, negate(src[1]), flags);
-			break;
-		case OPCODE_TEX:
-			emit_tex(cs, fpi, R300_TEX_OP_LD);
-			break;
-		case OPCODE_TXB:
-			emit_tex(cs, fpi, R300_TEX_OP_TXB);
-			break;
-		case OPCODE_TXP:
-			emit_tex(cs, fpi, R300_TEX_OP_TXP);
-			break;
-		case OPCODE_XPD:{
-				src[0] = t_src(cs, fpi->SrcReg[0]);
-				src[1] = t_src(cs, fpi->SrcReg[1]);
-				temp[0] = get_temp_reg(cs);
-				/* temp = src0.zxy * src1.yzx */
-				emit_arith(cs, PFS_OP_MAD, temp[0],
-					   WRITEMASK_XYZ, swizzle(keep(src[0]),
-								  Z, X, Y, W),
-					   swizzle(keep(src[1]), Y, Z, X, W),
-					   pfs_zero, 0);
-				/* dest.xyz = src0.yzx * src1.zxy - temp
-				 * dest.w       = undefined
-				 * */
-				emit_arith(cs, PFS_OP_MAD, dest,
-					   mask & WRITEMASK_XYZ, swizzle(src[0],
-									 Y, Z,
-									 X, W),
-					   swizzle(src[1], Z, X, Y, W),
-					   negate(temp[0]), flags);
-				/* cleanup */
-				free_temp(cs, temp[0]);
-				break;
-			}
-		default:
-			ERROR("unknown fpi->Opcode %d\n", fpi->Opcode);
-			break;
-		}
-
-		if (fp->error)
-			return GL_FALSE;
-
-	}
-
-	return GL_TRUE;
-}
-
-static void insert_wpos(struct gl_program *prog)
-{
 	static gl_state_index tokens[STATE_LENGTH] = {
 		STATE_INTERNAL, STATE_R300_WINDOW_DIMENSION, 0, 0, 0
 	};
 	struct prog_instruction *fpi;
 	GLuint window_index;
 	int i = 0;
-	GLuint tempregi = prog->NumTemporaries;
-	/* should do something else if no temps left... */
-	prog->NumTemporaries++;
+	GLuint tempregi = radeonCompilerAllocateTemporary(&compiler->compiler);
 
-	fpi = _mesa_alloc_instructions(prog->NumInstructions + 3);
-	_mesa_init_instructions(fpi, prog->NumInstructions + 3);
+	fpi = radeonClauseInsertInstructions(&compiler->compiler, &compiler->compiler.Clauses[0], 0, 3);
 
 	/* perspective divide */
 	fpi[i].Opcode = OPCODE_RCP;
@@ -2121,7 +118,7 @@ static void insert_wpos(struct gl_program *prog)
 	i++;
 
 	/* viewport transformation */
-	window_index = _mesa_add_state_reference(prog->Parameters, tokens);
+	window_index = _mesa_add_state_reference(compiler->fp->mesa_program.Base.Parameters, tokens);
 
 	fpi[i].Opcode = OPCODE_MAD;
 
@@ -2146,193 +143,42 @@ static void insert_wpos(struct gl_program *prog)
 	    MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ZERO);
 	i++;
 
-	_mesa_copy_instructions(&fpi[i], prog->Instructions,
-				prog->NumInstructions);
-
-	free(prog->Instructions);
-
-	prog->Instructions = fpi;
-
-	prog->NumInstructions += i;
-	fpi = &prog->Instructions[prog->NumInstructions - 1];
-
-	assert(fpi->Opcode == OPCODE_END);
-
-	for (fpi = &prog->Instructions[3]; fpi->Opcode != OPCODE_END; fpi++) {
-		for (i = 0; i < 3; i++)
-			if (fpi->SrcReg[i].File == PROGRAM_INPUT &&
-			    fpi->SrcReg[i].Index == FRAG_ATTRIB_WPOS) {
-				fpi->SrcReg[i].File = PROGRAM_TEMPORARY;
-				fpi->SrcReg[i].Index = tempregi;
-			}
-	}
-}
-
-/* - Init structures
- * - Determine what hwregs each input corresponds to
- */
-static void init_program(struct r300_pfs_compile_state *cs)
-{
-	COMPILE_STATE;
-	struct gl_fragment_program *mp = &fp->mesa_program;
-	struct prog_instruction *fpi;
-	GLuint InputsRead = mp->Base.InputsRead;
-	GLuint temps_used = 0;	/* for fp->temps[] */
-	int i, j;
-
-	/* New compile, reset tracking data */
-	fp->optimization =
-	    driQueryOptioni(&cs->r300->radeon.optionCache, "fp_optimization");
-	fp->translated = GL_FALSE;
-	fp->error = GL_FALSE;
-	fp->WritesDepth = GL_FALSE;
-	code->tex.length = 0;
-	code->cur_node = 0;
-	code->first_node_has_tex = 0;
-	code->const_nr = 0;
-	code->max_temp_idx = 0;
-	code->node[0].alu_end = -1;
-	code->node[0].tex_end = -1;
-
-	for (i = 0; i < PFS_MAX_ALU_INST; i++) {
-		for (j = 0; j < 3; j++) {
-			cs->slot[i].vsrc[j] = SRC_CONST;
-			cs->slot[i].ssrc[j] = SRC_CONST;
-		}
-	}
-
-	/* Work out what temps the Mesa inputs correspond to, this must match
-	 * what setup_rs_unit does, which shouldn't be a problem as rs_unit
-	 * configures itself based on the fragprog's InputsRead
-	 *
-	 * NOTE: this depends on get_hw_temp() allocating registers in order,
-	 * starting from register 0.
-	 */
-
-	/* Texcoords come first */
-	for (i = 0; i < cs->r300->radeon.glCtx->Const.MaxTextureUnits; i++) {
-		if (InputsRead & (FRAG_BIT_TEX0 << i)) {
-			cs->inputs[FRAG_ATTRIB_TEX0 + i].refcount = 0;
-			cs->inputs[FRAG_ATTRIB_TEX0 + i].reg =
-			    get_hw_temp(cs, 0);
-		}
-	}
-	InputsRead &= ~FRAG_BITS_TEX_ANY;
-
-	/* fragment position treated as a texcoord */
-	if (InputsRead & FRAG_BIT_WPOS) {
-		cs->inputs[FRAG_ATTRIB_WPOS].refcount = 0;
-		cs->inputs[FRAG_ATTRIB_WPOS].reg = get_hw_temp(cs, 0);
-		insert_wpos(&mp->Base);
-	}
-	InputsRead &= ~FRAG_BIT_WPOS;
-
-	/* Then primary colour */
-	if (InputsRead & FRAG_BIT_COL0) {
-		cs->inputs[FRAG_ATTRIB_COL0].refcount = 0;
-		cs->inputs[FRAG_ATTRIB_COL0].reg = get_hw_temp(cs, 0);
-	}
-	InputsRead &= ~FRAG_BIT_COL0;
-
-	/* Secondary color */
-	if (InputsRead & FRAG_BIT_COL1) {
-		cs->inputs[FRAG_ATTRIB_COL1].refcount = 0;
-		cs->inputs[FRAG_ATTRIB_COL1].reg = get_hw_temp(cs, 0);
-	}
-	InputsRead &= ~FRAG_BIT_COL1;
-
-	/* Anything else */
-	if (InputsRead) {
-		WARN_ONCE("Don't know how to handle inputs 0x%x\n", InputsRead);
-		/* force read from hwreg 0 for now */
-		for (i = 0; i < 32; i++)
-			if (InputsRead & (1 << i))
-				cs->inputs[i].reg = 0;
-	}
-
-	/* Pre-parse the mesa program, grabbing refcounts on input/temp regs.
-	 * That way, we can free up the reg when it's no longer needed
-	 */
-	if (!mp->Base.Instructions) {
-		ERROR("No instructions found in program\n");
-		return;
-	}
-
-	for (fpi = mp->Base.Instructions; fpi->Opcode != OPCODE_END; fpi++) {
-		int idx;
-
-		for (i = 0; i < 3; i++) {
-			idx = fpi->SrcReg[i].Index;
-			switch (fpi->SrcReg[i].File) {
-			case PROGRAM_TEMPORARY:
-				if (!(temps_used & (1 << idx))) {
-					cs->temps[idx].reg = -1;
-					cs->temps[idx].refcount = 1;
-					temps_used |= (1 << idx);
-				} else
-					cs->temps[idx].refcount++;
-				break;
-			case PROGRAM_INPUT:
-				cs->inputs[idx].refcount++;
-				break;
-			default:
-				break;
+	for (; i < compiler->compiler.Clauses[0].NumInstructions; ++i) {
+		int reg;
+		for (reg = 0; reg < 3; reg++) {
+			if (fpi[i].SrcReg[reg].File == PROGRAM_INPUT &&
+			    fpi[i].SrcReg[reg].Index == FRAG_ATTRIB_WPOS) {
+				fpi[i].SrcReg[reg].File = PROGRAM_TEMPORARY;
+				fpi[i].SrcReg[reg].Index = tempregi;
 			}
 		}
-
-		idx = fpi->DstReg.Index;
-		if (fpi->DstReg.File == PROGRAM_TEMPORARY) {
-			if (!(temps_used & (1 << idx))) {
-				cs->temps[idx].reg = -1;
-				cs->temps[idx].refcount = 1;
-				temps_used |= (1 << idx);
-			} else
-				cs->temps[idx].refcount++;
-		}
 	}
-	cs->temp_in_use = temps_used;
 }
 
-static void update_params(r300ContextPtr r300, struct r300_fragment_program *fp)
-{
-	struct gl_fragment_program *mp = &fp->mesa_program;
-
-	/* Ask Mesa nicely to fill in ParameterValues for us */
-	if (mp->Base.Parameters)
-		_mesa_load_state_parameters(r300->radeon.glCtx, mp->Base.Parameters);
-}
 
 void r300TranslateFragmentShader(r300ContextPtr r300,
 				 struct r300_fragment_program *fp)
 {
 	if (!fp->translated) {
-		struct r300_pfs_compile_state cs;
+		struct r300_fragment_program_compiler compiler;
 
-		_mesa_memset(&cs, 0, sizeof(cs));
-		cs.r300 = r300;
-		cs.fp = fp;
-		init_program(&cs);
+		compiler.r300 = r300;
+		compiler.fp = fp;
+		compiler.code = &fp->code;
 
-		if (parse_program(&cs) == GL_FALSE) {
-			dump_program(fp, &fp->code);
-			return;
-		}
+		radeonCompilerInit(&compiler.compiler, r300->radeon.glCtx, &fp->mesa_program.Base);
+
+		insert_WPOS_trailer(&compiler);
+
+		if (!r300FragmentProgramEmit(&compiler))
+			fp->error = GL_TRUE;
 
-		/* Finish off */
-		fp->code.node[fp->code.cur_node].alu_end =
-		    cs.nrslots - fp->code.node[fp->code.cur_node].alu_offset - 1;
-		if (fp->code.node[fp->code.cur_node].tex_end < 0)
-			fp->code.node[fp->code.cur_node].tex_end = 0;
-		fp->code.alu_offset = 0;
-		fp->code.alu_end = cs.nrslots - 1;
-		fp->code.tex_offset = 0;
-		fp->code.tex_end = fp->code.tex.length ? fp->code.tex.length - 1 : 0;
-		assert(fp->code.node[fp->code.cur_node].alu_end >= 0);
-		assert(fp->code.alu_end >= 0);
+		radeonCompilerCleanup(&compiler.compiler);
 
-		fp->translated = GL_TRUE;
-		if (RADEON_DEBUG & DEBUG_PIXEL)
-			dump_program(fp, &fp->code);
+		if (!fp->error)
+			fp->translated = GL_TRUE;
+		if (fp->error || (RADEON_DEBUG & DEBUG_PIXEL))
+			r300FragmentProgramDump(fp, &fp->code);
 		r300UpdateStateParameters(r300->radeon.glCtx, _NEW_PROGRAM);
 	}
 
@@ -2340,8 +186,9 @@ void r300TranslateFragmentShader(r300ContextPtr r300,
 }
 
 /* just some random things... */
-static void dump_program(struct r300_fragment_program *fp,
-			 struct r300_fragment_program_code *code)
+void r300FragmentProgramDump(
+	struct r300_fragment_program *fp,
+	struct r300_fragment_program_code *code)
 {
 	int n, i, j;
 	static int pc = 0;
diff --git a/src/mesa/drivers/dri/r300/r300_fragprog.h b/src/mesa/drivers/dri/r300/r300_fragprog.h
index 561d7c6423a..8c836c4bda6 100644
--- a/src/mesa/drivers/dri/r300/r300_fragprog.h
+++ b/src/mesa/drivers/dri/r300/r300_fragprog.h
@@ -40,6 +40,7 @@
 #include "shader/prog_instruction.h"
 
 #include "r300_context.h"
+#include "radeon_program.h"
 
 /* supported hw opcodes */
 #define PFS_OP_MAD 0
@@ -136,4 +137,23 @@ struct r300_fragment_program;
 extern void r300TranslateFragmentShader(r300ContextPtr r300,
 					struct r300_fragment_program *fp);
 
+
+/**
+ * Used internally by the r300 fragment program code to store compile-time
+ * only data.
+ */
+struct r300_fragment_program_compiler {
+	r300ContextPtr r300;
+	struct r300_fragment_program *fp;
+	struct r300_fragment_program_code *code;
+	struct radeon_compiler compiler;
+};
+
+extern GLboolean r300FragmentProgramEmit(struct r300_fragment_program_compiler *compiler);
+
+
+extern void r300FragmentProgramDump(
+	struct r300_fragment_program *fp,
+	struct r300_fragment_program_code *code);
+
 #endif
diff --git a/src/mesa/drivers/dri/r300/r300_fragprog_emit.c b/src/mesa/drivers/dri/r300/r300_fragprog_emit.c
new file mode 100644
index 00000000000..fe8a347a625
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/r300_fragprog_emit.c
@@ -0,0 +1,2232 @@
+/*
+ * Copyright (C) 2005 Ben Skeggs.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/**
+ * \file
+ *
+ * Emit the r300_fragment_program_code that can be understood by the hardware.
+ * Input is a pre-transformed radeon_program.
+ *
+ * \author Ben Skeggs <[email protected]>
+ *
+ * \author Jerome Glisse <[email protected]>
+ *
+ * \todo FogOption
+ *
+ * \todo Verify results of opcodes for accuracy, I've only checked them in
+ * specific cases.
+ */
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+#include "shader/prog_instruction.h"
+#include "shader/prog_parameter.h"
+#include "shader/prog_print.h"
+
+#include "r300_context.h"
+#include "r300_fragprog.h"
+#include "r300_reg.h"
+#include "r300_state.h"
+
+/* Mapping Mesa registers to R300 temporaries */
+struct reg_acc {
+	int reg;		/* Assigned hw temp */
+	unsigned int refcount;	/* Number of uses by mesa program */
+};
+
+/**
+ * Describe the current lifetime information for an R300 temporary
+ */
+struct reg_lifetime {
+	/* Index of the first slot where this register is free in the sense
+	   that it can be used as a new destination register.
+	   This is -1 if the register has been assigned to a Mesa register
+	   and the last access to the register has not yet been emitted */
+	int free;
+
+	/* Index of the first slot where this register is currently reserved.
+	   This is used to stop e.g. a scalar operation from being moved
+	   before the allocation time of a register that was first allocated
+	   for a vector operation. */
+	int reserved;
+
+	/* Index of the first slot in which the register can be used as a
+	   source without losing the value that is written by the last
+	   emitted instruction that writes to the register */
+	int vector_valid;
+	int scalar_valid;
+
+	/* Index to the slot where the register was last read.
+	   This is also the first slot in which the register may be written again */
+	int vector_lastread;
+	int scalar_lastread;
+};
+
+/**
+ * Store usage information about an ALU instruction slot during the
+ * compilation of a fragment program.
+ */
+#define SLOT_SRC_VECTOR  (1<<0)
+#define SLOT_SRC_SCALAR  (1<<3)
+#define SLOT_SRC_BOTH    (SLOT_SRC_VECTOR | SLOT_SRC_SCALAR)
+#define SLOT_OP_VECTOR   (1<<16)
+#define SLOT_OP_SCALAR   (1<<17)
+#define SLOT_OP_BOTH     (SLOT_OP_VECTOR | SLOT_OP_SCALAR)
+
+struct r300_pfs_compile_slot {
+	/* Bitmask indicating which parts of the slot are used, using SLOT_ constants
+	   defined above */
+	unsigned int used;
+
+	/* Selected sources */
+	int vsrc[3];
+	int ssrc[3];
+};
+
+/**
+ * Store information during compilation of fragment programs.
+ */
+struct r300_pfs_compile_state {
+	struct r300_fragment_program_compiler *compiler;
+
+	int nrslots;		/* number of ALU slots used so far */
+
+	/* Track which (parts of) slots are already filled with instructions */
+	struct r300_pfs_compile_slot slot[PFS_MAX_ALU_INST];
+
+	/* Track the validity of R300 temporaries */
+	struct reg_lifetime hwtemps[PFS_NUM_TEMP_REGS];
+
+	/* Used to map Mesa's inputs/temps onto hardware temps */
+	int temp_in_use;
+	struct reg_acc temps[PFS_NUM_TEMP_REGS];
+	struct reg_acc inputs[32];	/* don't actually need 32... */
+
+	/* Track usage of hardware temps, for register allocation,
+	 * indirection detection, etc. */
+	GLuint used_in_node;
+	GLuint dest_in_node;
+};
+
+
+/*
+ * Usefull macros and values
+ */
+#define ERROR(fmt, args...) do {			\
+		fprintf(stderr, "%s::%s(): " fmt "\n",	\
+			__FILE__, __FUNCTION__, ##args);	\
+		fp->error = GL_TRUE;			\
+	} while(0)
+
+#define PFS_INVAL 0xFFFFFFFF
+#define COMPILE_STATE \
+	struct r300_fragment_program *fp = cs->compiler->fp; \
+	struct r300_fragment_program_code *code = cs->compiler->code; \
+	(void)code; (void)fp
+
+#define SWIZZLE_XYZ		0
+#define SWIZZLE_XXX		1
+#define SWIZZLE_YYY		2
+#define SWIZZLE_ZZZ		3
+#define SWIZZLE_WWW		4
+#define SWIZZLE_YZX		5
+#define SWIZZLE_ZXY		6
+#define SWIZZLE_WZY		7
+#define SWIZZLE_111		8
+#define SWIZZLE_000		9
+#define SWIZZLE_HHH		10
+
+#define swizzle(r, x, y, z, w) do_swizzle(cs, r,		\
+					  ((SWIZZLE_##x<<0)|	\
+					   (SWIZZLE_##y<<3)|	\
+					   (SWIZZLE_##z<<6)|	\
+					   (SWIZZLE_##w<<9)),	\
+					  0)
+
+#define REG_TYPE_INPUT		0
+#define REG_TYPE_OUTPUT		1
+#define REG_TYPE_TEMP		2
+#define REG_TYPE_CONST		3
+
+#define REG_TYPE_SHIFT		0
+#define REG_INDEX_SHIFT		2
+#define REG_VSWZ_SHIFT		8
+#define REG_SSWZ_SHIFT		13
+#define REG_NEGV_SHIFT		18
+#define REG_NEGS_SHIFT		19
+#define REG_ABS_SHIFT		20
+#define REG_NO_USE_SHIFT	21	// Hack for refcounting
+#define REG_VALID_SHIFT		22	// Does the register contain a defined value?
+#define REG_BUILTIN_SHIFT   23	// Is it a builtin (like all zero/all one)?
+
+#define REG_TYPE_MASK		(0x03 << REG_TYPE_SHIFT)
+#define REG_INDEX_MASK		(0x3F << REG_INDEX_SHIFT)
+#define REG_VSWZ_MASK		(0x1F << REG_VSWZ_SHIFT)
+#define REG_SSWZ_MASK		(0x1F << REG_SSWZ_SHIFT)
+#define REG_NEGV_MASK		(0x01 << REG_NEGV_SHIFT)
+#define REG_NEGS_MASK		(0x01 << REG_NEGS_SHIFT)
+#define REG_ABS_MASK		(0x01 << REG_ABS_SHIFT)
+#define REG_NO_USE_MASK		(0x01 << REG_NO_USE_SHIFT)
+#define REG_VALID_MASK		(0x01 << REG_VALID_SHIFT)
+#define REG_BUILTIN_MASK	(0x01 << REG_BUILTIN_SHIFT)
+
+#define REG(type, index, vswz, sswz, nouse, valid, builtin)	\
+	(((type << REG_TYPE_SHIFT) & REG_TYPE_MASK) |			\
+	 ((index << REG_INDEX_SHIFT) & REG_INDEX_MASK) |		\
+	 ((nouse << REG_NO_USE_SHIFT) & REG_NO_USE_MASK) |		\
+	 ((valid << REG_VALID_SHIFT) & REG_VALID_MASK) |		\
+	 ((builtin << REG_BUILTIN_SHIFT) & REG_BUILTIN_MASK) |	\
+	 ((vswz << REG_VSWZ_SHIFT) & REG_VSWZ_MASK) |			\
+	 ((sswz << REG_SSWZ_SHIFT) & REG_SSWZ_MASK))
+#define REG_GET_TYPE(reg)						\
+	((reg & REG_TYPE_MASK) >> REG_TYPE_SHIFT)
+#define REG_GET_INDEX(reg)						\
+	((reg & REG_INDEX_MASK) >> REG_INDEX_SHIFT)
+#define REG_GET_VSWZ(reg)						\
+	((reg & REG_VSWZ_MASK) >> REG_VSWZ_SHIFT)
+#define REG_GET_SSWZ(reg)						\
+	((reg & REG_SSWZ_MASK) >> REG_SSWZ_SHIFT)
+#define REG_GET_NO_USE(reg)						\
+	((reg & REG_NO_USE_MASK) >> REG_NO_USE_SHIFT)
+#define REG_GET_VALID(reg)						\
+	((reg & REG_VALID_MASK) >> REG_VALID_SHIFT)
+#define REG_GET_BUILTIN(reg)						\
+	((reg & REG_BUILTIN_MASK) >> REG_BUILTIN_SHIFT)
+#define REG_SET_TYPE(reg, type)						\
+	reg = ((reg & ~REG_TYPE_MASK) |					\
+	       ((type << REG_TYPE_SHIFT) & REG_TYPE_MASK))
+#define REG_SET_INDEX(reg, index)					\
+	reg = ((reg & ~REG_INDEX_MASK) |				\
+	       ((index << REG_INDEX_SHIFT) & REG_INDEX_MASK))
+#define REG_SET_VSWZ(reg, vswz)						\
+	reg = ((reg & ~REG_VSWZ_MASK) |					\
+	       ((vswz << REG_VSWZ_SHIFT) & REG_VSWZ_MASK))
+#define REG_SET_SSWZ(reg, sswz)						\
+	reg = ((reg & ~REG_SSWZ_MASK) |					\
+	       ((sswz << REG_SSWZ_SHIFT) & REG_SSWZ_MASK))
+#define REG_SET_NO_USE(reg, nouse)					\
+	reg = ((reg & ~REG_NO_USE_MASK) |				\
+	       ((nouse << REG_NO_USE_SHIFT) & REG_NO_USE_MASK))
+#define REG_SET_VALID(reg, valid)					\
+	reg = ((reg & ~REG_VALID_MASK) |				\
+	       ((valid << REG_VALID_SHIFT) & REG_VALID_MASK))
+#define REG_SET_BUILTIN(reg, builtin)					\
+	reg = ((reg & ~REG_BUILTIN_MASK) |				\
+	       ((builtin << REG_BUILTIN_SHIFT) & REG_BUILTIN_MASK))
+#define REG_ABS(reg)							\
+	reg = (reg | REG_ABS_MASK)
+#define REG_NEGV(reg)							\
+	reg = (reg | REG_NEGV_MASK)
+#define REG_NEGS(reg)							\
+	reg = (reg | REG_NEGS_MASK)
+
+#define NOP_INST0 (						 \
+		(R300_ALU_OUTC_MAD) |				 \
+		(R300_ALU_ARGC_ZERO << R300_ALU_ARG0C_SHIFT) | \
+		(R300_ALU_ARGC_ZERO << R300_ALU_ARG1C_SHIFT) | \
+		(R300_ALU_ARGC_ZERO << R300_ALU_ARG2C_SHIFT))
+#define NOP_INST1 (					     \
+		((0 | SRC_CONST) << R300_ALU_SRC0C_SHIFT) | \
+		((0 | SRC_CONST) << R300_ALU_SRC1C_SHIFT) | \
+		((0 | SRC_CONST) << R300_ALU_SRC2C_SHIFT))
+#define NOP_INST2 ( \
+		(R300_ALU_OUTA_MAD) |				 \
+		(R300_ALU_ARGA_ZERO << R300_ALU_ARG0A_SHIFT) | \
+		(R300_ALU_ARGA_ZERO << R300_ALU_ARG1A_SHIFT) | \
+		(R300_ALU_ARGA_ZERO << R300_ALU_ARG2A_SHIFT))
+#define NOP_INST3 (					     \
+		((0 | SRC_CONST) << R300_ALU_SRC0A_SHIFT) | \
+		((0 | SRC_CONST) << R300_ALU_SRC1A_SHIFT) | \
+		((0 | SRC_CONST) << R300_ALU_SRC2A_SHIFT))
+
+
+/*
+ * Datas structures for fragment program generation
+ */
+
+/* description of r300 native hw instructions */
+static const struct {
+	const char *name;
+	int argc;
+	int v_op;
+	int s_op;
+} r300_fpop[] = {
+	/* *INDENT-OFF* */
+	{"MAD", 3, R300_ALU_OUTC_MAD, R300_ALU_OUTA_MAD},
+	{"DP3", 2, R300_ALU_OUTC_DP3, R300_ALU_OUTA_DP4},
+	{"DP4", 2, R300_ALU_OUTC_DP4, R300_ALU_OUTA_DP4},
+	{"MIN", 2, R300_ALU_OUTC_MIN, R300_ALU_OUTA_MIN},
+	{"MAX", 2, R300_ALU_OUTC_MAX, R300_ALU_OUTA_MAX},
+	{"CMP", 3, R300_ALU_OUTC_CMP, R300_ALU_OUTA_CMP},
+	{"FRC", 1, R300_ALU_OUTC_FRC, R300_ALU_OUTA_FRC},
+	{"EX2", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_EX2},
+	{"LG2", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_LG2},
+	{"RCP", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_RCP},
+	{"RSQ", 1, R300_ALU_OUTC_REPL_ALPHA, R300_ALU_OUTA_RSQ},
+	{"REPL_ALPHA", 1, R300_ALU_OUTC_REPL_ALPHA, PFS_INVAL},
+	{"CMPH", 3, R300_ALU_OUTC_CMPH, PFS_INVAL},
+	/* *INDENT-ON* */
+};
+
+/* vector swizzles r300 can support natively, with a couple of
+ * cases we handle specially
+ *
+ * REG_VSWZ/REG_SSWZ is an index into this table
+ */
+
+/* mapping from SWIZZLE_* to r300 native values for scalar insns */
+#define SWIZZLE_HALF 6
+
+#define MAKE_SWZ3(x, y, z) (MAKE_SWIZZLE4(SWIZZLE_##x, \
+					  SWIZZLE_##y, \
+					  SWIZZLE_##z, \
+					  SWIZZLE_ZERO))
+/* native swizzles */
+static const struct r300_pfs_swizzle {
+	GLuint hash;		/* swizzle value this matches */
+	GLuint base;		/* base value for hw swizzle */
+	GLuint stride;		/* difference in base between arg0/1/2 */
+	GLuint flags;
+} v_swiz[] = {
+	/* *INDENT-OFF* */
+	{MAKE_SWZ3(X, Y, Z), R300_ALU_ARGC_SRC0C_XYZ, 4, SLOT_SRC_VECTOR},
+	{MAKE_SWZ3(X, X, X), R300_ALU_ARGC_SRC0C_XXX, 4, SLOT_SRC_VECTOR},
+	{MAKE_SWZ3(Y, Y, Y), R300_ALU_ARGC_SRC0C_YYY, 4, SLOT_SRC_VECTOR},
+	{MAKE_SWZ3(Z, Z, Z), R300_ALU_ARGC_SRC0C_ZZZ, 4, SLOT_SRC_VECTOR},
+	{MAKE_SWZ3(W, W, W), R300_ALU_ARGC_SRC0A, 1, SLOT_SRC_SCALAR},
+	{MAKE_SWZ3(Y, Z, X), R300_ALU_ARGC_SRC0C_YZX, 1, SLOT_SRC_VECTOR},
+	{MAKE_SWZ3(Z, X, Y), R300_ALU_ARGC_SRC0C_ZXY, 1, SLOT_SRC_VECTOR},
+	{MAKE_SWZ3(W, Z, Y), R300_ALU_ARGC_SRC0CA_WZY, 1, SLOT_SRC_BOTH},
+	{MAKE_SWZ3(ONE, ONE, ONE), R300_ALU_ARGC_ONE, 0, 0},
+	{MAKE_SWZ3(ZERO, ZERO, ZERO), R300_ALU_ARGC_ZERO, 0, 0},
+	{MAKE_SWZ3(HALF, HALF, HALF), R300_ALU_ARGC_HALF, 0, 0},
+	{PFS_INVAL, 0, 0, 0},
+	/* *INDENT-ON* */
+};
+
+/* used during matching of non-native swizzles */
+#define SWZ_X_MASK (7 << 0)
+#define SWZ_Y_MASK (7 << 3)
+#define SWZ_Z_MASK (7 << 6)
+#define SWZ_W_MASK (7 << 9)
+static const struct {
+	GLuint hash;		/* used to mask matching swizzle components */
+	int mask;		/* actual outmask */
+	int count;		/* count of components matched */
+} s_mask[] = {
+	/* *INDENT-OFF* */
+	{SWZ_X_MASK | SWZ_Y_MASK | SWZ_Z_MASK, 1 | 2 | 4, 3},
+	{SWZ_X_MASK | SWZ_Y_MASK, 1 | 2, 2},
+	{SWZ_X_MASK | SWZ_Z_MASK, 1 | 4, 2},
+	{SWZ_Y_MASK | SWZ_Z_MASK, 2 | 4, 2},
+	{SWZ_X_MASK, 1, 1},
+	{SWZ_Y_MASK, 2, 1},
+	{SWZ_Z_MASK, 4, 1},
+	{PFS_INVAL, PFS_INVAL, PFS_INVAL}
+	/* *INDENT-ON* */
+};
+
+static const struct {
+	int base;		/* hw value of swizzle */
+	int stride;		/* difference between SRC0/1/2 */
+	GLuint flags;
+} s_swiz[] = {
+	/* *INDENT-OFF* */
+	{R300_ALU_ARGA_SRC0C_X, 3, SLOT_SRC_VECTOR},
+	{R300_ALU_ARGA_SRC0C_Y, 3, SLOT_SRC_VECTOR},
+	{R300_ALU_ARGA_SRC0C_Z, 3, SLOT_SRC_VECTOR},
+	{R300_ALU_ARGA_SRC0A, 1, SLOT_SRC_SCALAR},
+	{R300_ALU_ARGA_ZERO, 0, 0},
+	{R300_ALU_ARGA_ONE, 0, 0},
+	{R300_ALU_ARGA_HALF, 0, 0}
+	/* *INDENT-ON* */
+};
+
+/* boiler-plate reg, for convenience */
+static const GLuint undef = REG(REG_TYPE_TEMP,
+				0,
+				SWIZZLE_XYZ,
+				SWIZZLE_W,
+				GL_FALSE,
+				GL_FALSE,
+				GL_FALSE);
+
+/* constant one source */
+static const GLuint pfs_one = REG(REG_TYPE_CONST,
+				  0,
+				  SWIZZLE_111,
+				  SWIZZLE_ONE,
+				  GL_FALSE,
+				  GL_TRUE,
+				  GL_TRUE);
+
+/* constant half source */
+static const GLuint pfs_half = REG(REG_TYPE_CONST,
+				   0,
+				   SWIZZLE_HHH,
+				   SWIZZLE_HALF,
+				   GL_FALSE,
+				   GL_TRUE,
+				   GL_TRUE);
+
+/* constant zero source */
+static const GLuint pfs_zero = REG(REG_TYPE_CONST,
+				   0,
+				   SWIZZLE_000,
+				   SWIZZLE_ZERO,
+				   GL_FALSE,
+				   GL_TRUE,
+				   GL_TRUE);
+
+/*
+ * Common functions prototypes
+ */
+static void emit_arith(struct r300_pfs_compile_state *cs, int op,
+		       GLuint dest, int mask,
+		       GLuint src0, GLuint src1, GLuint src2, int flags);
+
+/**
+ * Get an R300 temporary that can be written to in the given slot.
+ */
+static int get_hw_temp(struct r300_pfs_compile_state *cs, int slot)
+{
+	COMPILE_STATE;
+	int r;
+
+	for (r = 0; r < PFS_NUM_TEMP_REGS; ++r) {
+		if (cs->hwtemps[r].free >= 0 && cs->hwtemps[r].free <= slot)
+			break;
+	}
+
+	if (r >= PFS_NUM_TEMP_REGS) {
+		ERROR("Out of hardware temps\n");
+		return 0;
+	}
+	// Reserved is used to avoid the following scenario:
+	//  R300 temporary X is first assigned to Mesa temporary Y during vector ops
+	//  R300 temporary X is then assigned to Mesa temporary Z for further vector ops
+	//  Then scalar ops on Mesa temporary Z are emitted and move back in time
+	//  to overwrite the value of temporary Y.
+	// End scenario.
+	cs->hwtemps[r].reserved = cs->hwtemps[r].free;
+	cs->hwtemps[r].free = -1;
+
+	// Reset to some value that won't mess things up when the user
+	// tries to read from a temporary that hasn't been assigned a value yet.
+	// In the normal case, vector_valid and scalar_valid should be set to
+	// a sane value by the first emit that writes to this temporary.
+	cs->hwtemps[r].vector_valid = 0;
+	cs->hwtemps[r].scalar_valid = 0;
+
+	if (r > code->max_temp_idx)
+		code->max_temp_idx = r;
+
+	return r;
+}
+
+/**
+ * Get an R300 temporary that will act as a TEX destination register.
+ */
+static int get_hw_temp_tex(struct r300_pfs_compile_state *cs)
+{
+	COMPILE_STATE;
+	int r;
+
+	for (r = 0; r < PFS_NUM_TEMP_REGS; ++r) {
+		if (cs->used_in_node & (1 << r))
+			continue;
+
+		// Note: Be very careful here
+		if (cs->hwtemps[r].free >= 0 && cs->hwtemps[r].free <= 0)
+			break;
+	}
+
+	if (r >= PFS_NUM_TEMP_REGS)
+		return get_hw_temp(cs, 0);	/* Will cause an indirection */
+
+	cs->hwtemps[r].reserved = cs->hwtemps[r].free;
+	cs->hwtemps[r].free = -1;
+
+	// Reset to some value that won't mess things up when the user
+	// tries to read from a temporary that hasn't been assigned a value yet.
+	// In the normal case, vector_valid and scalar_valid should be set to
+	// a sane value by the first emit that writes to this temporary.
+	cs->hwtemps[r].vector_valid = cs->nrslots;
+	cs->hwtemps[r].scalar_valid = cs->nrslots;
+
+	if (r > code->max_temp_idx)
+		code->max_temp_idx = r;
+
+	return r;
+}
+
+/**
+ * Mark the given hardware register as free.
+ */
+static void free_hw_temp(struct r300_pfs_compile_state *cs, int idx)
+{
+	// Be very careful here. Consider sequences like
+	//  MAD r0, r1,r2,r3
+	//  TEX r4, ...
+	// The TEX instruction may be moved in front of the MAD instruction
+	// due to the way nodes work. We don't want to alias r1 and r4 in
+	// this case.
+	// I'm certain the register allocation could be further sanitized,
+	// but it's tricky because of stuff that can happen inside emit_tex
+	// and emit_arith.
+	cs->hwtemps[idx].free = cs->nrslots + 1;
+}
+
+/**
+ * Create a new Mesa temporary register.
+ */
+static GLuint get_temp_reg(struct r300_pfs_compile_state *cs)
+{
+	COMPILE_STATE;
+	GLuint r = undef;
+	GLuint index;
+
+	index = ffs(~cs->temp_in_use);
+	if (!index) {
+		ERROR("Out of program temps\n");
+		return r;
+	}
+
+	cs->temp_in_use |= (1 << --index);
+	cs->temps[index].refcount = 0xFFFFFFFF;
+	cs->temps[index].reg = -1;
+
+	REG_SET_TYPE(r, REG_TYPE_TEMP);
+	REG_SET_INDEX(r, index);
+	REG_SET_VALID(r, GL_TRUE);
+	return r;
+}
+
+/**
+ * Create a new Mesa temporary register that will act as the destination
+ * register for a texture read.
+ */
+static GLuint get_temp_reg_tex(struct r300_pfs_compile_state *cs)
+{
+	COMPILE_STATE;
+	GLuint r = undef;
+	GLuint index;
+
+	index = ffs(~cs->temp_in_use);
+	if (!index) {
+		ERROR("Out of program temps\n");
+		return r;
+	}
+
+	cs->temp_in_use |= (1 << --index);
+	cs->temps[index].refcount = 0xFFFFFFFF;
+	cs->temps[index].reg = get_hw_temp_tex(cs);
+
+	REG_SET_TYPE(r, REG_TYPE_TEMP);
+	REG_SET_INDEX(r, index);
+	REG_SET_VALID(r, GL_TRUE);
+	return r;
+}
+
+/**
+ * Free a Mesa temporary and the associated R300 temporary.
+ */
+static void free_temp(struct r300_pfs_compile_state *cs, GLuint r)
+{
+	GLuint index = REG_GET_INDEX(r);
+
+	if (!(cs->temp_in_use & (1 << index)))
+		return;
+
+	if (REG_GET_TYPE(r) == REG_TYPE_TEMP) {
+		free_hw_temp(cs, cs->temps[index].reg);
+		cs->temps[index].reg = -1;
+		cs->temp_in_use &= ~(1 << index);
+	} else if (REG_GET_TYPE(r) == REG_TYPE_INPUT) {
+		free_hw_temp(cs, cs->inputs[index].reg);
+		cs->inputs[index].reg = -1;
+	}
+}
+
+/**
+ * Emit a hardware constant/parameter.
+ *
+ * \p cp Stable pointer to an array of 4 floats.
+ *  The pointer must be stable in the sense that it remains to be valid
+ *  and hold the contents of the constant/parameter throughout the lifetime
+ *  of the fragment program (actually, up until the next time the fragment
+ *  program is translated).
+ */
+static GLuint emit_const4fv(struct r300_pfs_compile_state *cs,
+			    const GLfloat * cp)
+{
+	COMPILE_STATE;
+	GLuint reg = undef;
+	int index;
+
+	for (index = 0; index < code->const_nr; ++index) {
+		if (code->constant[index] == cp)
+			break;
+	}
+
+	if (index >= code->const_nr) {
+		if (index >= PFS_NUM_CONST_REGS) {
+			ERROR("Out of hw constants!\n");
+			return reg;
+		}
+
+		code->const_nr++;
+		code->constant[index] = cp;
+	}
+
+	REG_SET_TYPE(reg, REG_TYPE_CONST);
+	REG_SET_INDEX(reg, index);
+	REG_SET_VALID(reg, GL_TRUE);
+	return reg;
+}
+
+static inline GLuint negate(GLuint r)
+{
+	REG_NEGS(r);
+	REG_NEGV(r);
+	return r;
+}
+
+/* Hack, to prevent clobbering sources used multiple times when
+ * emulating non-native instructions
+ */
+static inline GLuint keep(GLuint r)
+{
+	REG_SET_NO_USE(r, GL_TRUE);
+	return r;
+}
+
+static inline GLuint absolute(GLuint r)
+{
+	REG_ABS(r);
+	return r;
+}
+
+static int swz_native(struct r300_pfs_compile_state *cs,
+		      GLuint src, GLuint * r, GLuint arbneg)
+{
+	COMPILE_STATE;
+
+	/* Native swizzle, handle negation */
+	src = (src & ~REG_NEGS_MASK) | (((arbneg >> 3) & 1) << REG_NEGS_SHIFT);
+
+	if ((arbneg & 0x7) == 0x0) {
+		src = src & ~REG_NEGV_MASK;
+		*r = src;
+	} else if ((arbneg & 0x7) == 0x7) {
+		src |= REG_NEGV_MASK;
+		*r = src;
+	} else {
+		if (!REG_GET_VALID(*r))
+			*r = get_temp_reg(cs);
+		src |= REG_NEGV_MASK;
+		emit_arith(cs,
+			   PFS_OP_MAD,
+			   *r, arbneg & 0x7, keep(src), pfs_one, pfs_zero, 0);
+		src = src & ~REG_NEGV_MASK;
+		emit_arith(cs,
+			   PFS_OP_MAD,
+			   *r,
+			   (arbneg ^ 0x7) | WRITEMASK_W,
+			   src, pfs_one, pfs_zero, 0);
+	}
+
+	return 3;
+}
+
+static int swz_emit_partial(struct r300_pfs_compile_state *cs,
+			    GLuint src,
+			    GLuint * r, int mask, int mc, GLuint arbneg)
+{
+	COMPILE_STATE;
+	GLuint tmp;
+	GLuint wmask = 0;
+
+	if (!REG_GET_VALID(*r))
+		*r = get_temp_reg(cs);
+
+	/* A partial match, VSWZ/mask define what parts of the
+	 * desired swizzle we match
+	 */
+	if (mc + s_mask[mask].count == 3) {
+		wmask = WRITEMASK_W;
+		src |= ((arbneg >> 3) & 1) << REG_NEGS_SHIFT;
+	}
+
+	tmp = arbneg & s_mask[mask].mask;
+	if (tmp) {
+		tmp = tmp ^ s_mask[mask].mask;
+		if (tmp) {
+			emit_arith(cs,
+				   PFS_OP_MAD,
+				   *r,
+				   arbneg & s_mask[mask].mask,
+				   keep(src) | REG_NEGV_MASK,
+				   pfs_one, pfs_zero, 0);
+			if (!wmask) {
+				REG_SET_NO_USE(src, GL_TRUE);
+			} else {
+				REG_SET_NO_USE(src, GL_FALSE);
+			}
+			emit_arith(cs,
+				   PFS_OP_MAD,
+				   *r, tmp | wmask, src, pfs_one, pfs_zero, 0);
+		} else {
+			if (!wmask) {
+				REG_SET_NO_USE(src, GL_TRUE);
+			} else {
+				REG_SET_NO_USE(src, GL_FALSE);
+			}
+			emit_arith(cs,
+				   PFS_OP_MAD,
+				   *r,
+				   (arbneg & s_mask[mask].mask) | wmask,
+				   src | REG_NEGV_MASK, pfs_one, pfs_zero, 0);
+		}
+	} else {
+		if (!wmask) {
+			REG_SET_NO_USE(src, GL_TRUE);
+		} else {
+			REG_SET_NO_USE(src, GL_FALSE);
+		}
+		emit_arith(cs, PFS_OP_MAD,
+			   *r,
+			   s_mask[mask].mask | wmask,
+			   src, pfs_one, pfs_zero, 0);
+	}
+
+	return s_mask[mask].count;
+}
+
+static GLuint do_swizzle(struct r300_pfs_compile_state *cs,
+			 GLuint src, GLuint arbswz, GLuint arbneg)
+{
+	COMPILE_STATE;
+	GLuint r = undef;
+	GLuint vswz;
+	int c_mask = 0;
+	int v_match = 0;
+
+	/* If swizzling from something without an XYZW native swizzle,
+	 * emit result to a temp, and do new swizzle from the temp.
+	 */
+#if 0
+	if (REG_GET_VSWZ(src) != SWIZZLE_XYZ || REG_GET_SSWZ(src) != SWIZZLE_W) {
+		GLuint temp = get_temp_reg(fp);
+		emit_arith(fp,
+			   PFS_OP_MAD,
+			   temp, WRITEMASK_XYZW, src, pfs_one, pfs_zero, 0);
+		src = temp;
+	}
+#endif
+
+	if (REG_GET_VSWZ(src) != SWIZZLE_XYZ || REG_GET_SSWZ(src) != SWIZZLE_W) {
+		GLuint vsrcswz =
+		    (v_swiz[REG_GET_VSWZ(src)].
+		     hash & (SWZ_X_MASK | SWZ_Y_MASK | SWZ_Z_MASK)) |
+		    REG_GET_SSWZ(src) << 9;
+		GLint i;
+
+		GLuint newswz = 0;
+		GLuint offset;
+		for (i = 0; i < 4; ++i) {
+			offset = GET_SWZ(arbswz, i);
+
+			newswz |=
+			    (offset <= 3) ? GET_SWZ(vsrcswz,
+						    offset) << i *
+			    3 : offset << i * 3;
+		}
+
+		arbswz = newswz & (SWZ_X_MASK | SWZ_Y_MASK | SWZ_Z_MASK);
+		REG_SET_SSWZ(src, GET_SWZ(newswz, 3));
+	} else {
+		/* set scalar swizzling */
+		REG_SET_SSWZ(src, GET_SWZ(arbswz, 3));
+
+	}
+	do {
+		vswz = REG_GET_VSWZ(src);
+		do {
+			int chash;
+
+			REG_SET_VSWZ(src, vswz);
+			chash = v_swiz[REG_GET_VSWZ(src)].hash &
+			    s_mask[c_mask].hash;
+
+			if (chash == (arbswz & s_mask[c_mask].hash)) {
+				if (s_mask[c_mask].count == 3) {
+					v_match += swz_native(cs,
+							      src, &r, arbneg);
+				} else {
+					v_match += swz_emit_partial(cs,
+								    src,
+								    &r,
+								    c_mask,
+								    v_match,
+								    arbneg);
+				}
+
+				if (v_match == 3)
+					return r;
+
+				/* Fill with something invalid.. all 0's was
+				 * wrong before, matched SWIZZLE_X.  So all
+				 * 1's will be okay for now
+				 */
+				arbswz |= (PFS_INVAL & s_mask[c_mask].hash);
+			}
+		} while (v_swiz[++vswz].hash != PFS_INVAL);
+		REG_SET_VSWZ(src, SWIZZLE_XYZ);
+	} while (s_mask[++c_mask].hash != PFS_INVAL);
+
+	ERROR("should NEVER get here\n");
+	return r;
+}
+
+static GLuint t_src(struct r300_pfs_compile_state *cs,
+		    struct prog_src_register fpsrc)
+{
+	COMPILE_STATE;
+	GLuint r = undef;
+
+	switch (fpsrc.File) {
+	case PROGRAM_TEMPORARY:
+		REG_SET_INDEX(r, fpsrc.Index);
+		REG_SET_VALID(r, GL_TRUE);
+		REG_SET_TYPE(r, REG_TYPE_TEMP);
+		break;
+	case PROGRAM_INPUT:
+		REG_SET_INDEX(r, fpsrc.Index);
+		REG_SET_VALID(r, GL_TRUE);
+		REG_SET_TYPE(r, REG_TYPE_INPUT);
+		break;
+	case PROGRAM_LOCAL_PARAM:
+		r = emit_const4fv(cs,
+				  fp->mesa_program.Base.LocalParams[fpsrc.
+								    Index]);
+		break;
+	case PROGRAM_ENV_PARAM:
+		r = emit_const4fv(cs,
+			cs->compiler->r300->radeon.glCtx->FragmentProgram.Parameters[fpsrc.Index]);
+		break;
+	case PROGRAM_STATE_VAR:
+	case PROGRAM_NAMED_PARAM:
+	case PROGRAM_CONSTANT:
+		r = emit_const4fv(cs,
+				  fp->mesa_program.Base.Parameters->
+				  ParameterValues[fpsrc.Index]);
+		break;
+	default:
+		ERROR("unknown SrcReg->File %x\n", fpsrc.File);
+		return r;
+	}
+
+	/* no point swizzling ONE/ZERO/HALF constants... */
+	if (REG_GET_VSWZ(r) < SWIZZLE_111 || REG_GET_SSWZ(r) < SWIZZLE_ZERO)
+		r = do_swizzle(cs, r, fpsrc.Swizzle, fpsrc.NegateBase);
+	return r;
+}
+
+static GLuint t_scalar_src(struct r300_pfs_compile_state *cs,
+			   struct prog_src_register fpsrc)
+{
+	struct prog_src_register src = fpsrc;
+	int sc = GET_SWZ(fpsrc.Swizzle, 0);	/* X */
+
+	src.Swizzle = ((sc << 0) | (sc << 3) | (sc << 6) | (sc << 9));
+
+	return t_src(cs, src);
+}
+
+static GLuint t_dst(struct r300_pfs_compile_state *cs,
+		    struct prog_dst_register dest)
+{
+	COMPILE_STATE;
+	GLuint r = undef;
+
+	switch (dest.File) {
+	case PROGRAM_TEMPORARY:
+		REG_SET_INDEX(r, dest.Index);
+		REG_SET_VALID(r, GL_TRUE);
+		REG_SET_TYPE(r, REG_TYPE_TEMP);
+		return r;
+	case PROGRAM_OUTPUT:
+		REG_SET_TYPE(r, REG_TYPE_OUTPUT);
+		switch (dest.Index) {
+		case FRAG_RESULT_COLR:
+		case FRAG_RESULT_DEPR:
+			REG_SET_INDEX(r, dest.Index);
+			REG_SET_VALID(r, GL_TRUE);
+			return r;
+		default:
+			ERROR("Bad DstReg->Index 0x%x\n", dest.Index);
+			return r;
+		}
+	default:
+		ERROR("Bad DstReg->File 0x%x\n", dest.File);
+		return r;
+	}
+}
+
+static int t_hw_src(struct r300_pfs_compile_state *cs, GLuint src, GLboolean tex)
+{
+	COMPILE_STATE;
+	int idx;
+	int index = REG_GET_INDEX(src);
+
+	switch (REG_GET_TYPE(src)) {
+	case REG_TYPE_TEMP:
+		/* NOTE: if reg==-1 here, a source is being read that
+		 *       hasn't been written to. Undefined results.
+		 */
+		if (cs->temps[index].reg == -1)
+			cs->temps[index].reg = get_hw_temp(cs, cs->nrslots);
+
+		idx = cs->temps[index].reg;
+
+		if (!REG_GET_NO_USE(src) && (--cs->temps[index].refcount == 0))
+			free_temp(cs, src);
+		break;
+	case REG_TYPE_INPUT:
+		idx = cs->inputs[index].reg;
+
+		if (!REG_GET_NO_USE(src) && (--cs->inputs[index].refcount == 0))
+			free_hw_temp(cs, cs->inputs[index].reg);
+		break;
+	case REG_TYPE_CONST:
+		return (index | SRC_CONST);
+	default:
+		ERROR("Invalid type for source reg\n");
+		return (0 | SRC_CONST);
+	}
+
+	if (!tex)
+		cs->used_in_node |= (1 << idx);
+
+	return idx;
+}
+
+static int t_hw_dst(struct r300_pfs_compile_state *cs,
+		    GLuint dest, GLboolean tex, int slot)
+{
+	COMPILE_STATE;
+	int idx;
+	GLuint index = REG_GET_INDEX(dest);
+	assert(REG_GET_VALID(dest));
+
+	switch (REG_GET_TYPE(dest)) {
+	case REG_TYPE_TEMP:
+		if (cs->temps[REG_GET_INDEX(dest)].reg == -1) {
+			if (!tex) {
+				cs->temps[index].reg = get_hw_temp(cs, slot);
+			} else {
+				cs->temps[index].reg = get_hw_temp_tex(cs);
+			}
+		}
+		idx = cs->temps[index].reg;
+
+		if (!REG_GET_NO_USE(dest) && (--cs->temps[index].refcount == 0))
+			free_temp(cs, dest);
+
+		cs->dest_in_node |= (1 << idx);
+		cs->used_in_node |= (1 << idx);
+		break;
+	case REG_TYPE_OUTPUT:
+		switch (index) {
+		case FRAG_RESULT_COLR:
+			code->node[code->cur_node].flags |= R300_RGBA_OUT;
+			break;
+		case FRAG_RESULT_DEPR:
+			fp->WritesDepth = GL_TRUE;
+			code->node[code->cur_node].flags |= R300_W_OUT;
+			break;
+		}
+		return index;
+		break;
+	default:
+		ERROR("invalid dest reg type %d\n", REG_GET_TYPE(dest));
+		return 0;
+	}
+
+	return idx;
+}
+
+static void emit_nop(struct r300_pfs_compile_state *cs)
+{
+	COMPILE_STATE;
+
+	if (cs->nrslots >= PFS_MAX_ALU_INST) {
+		ERROR("Out of ALU instruction slots\n");
+		return;
+	}
+
+	code->alu.inst[cs->nrslots].inst0 = NOP_INST0;
+	code->alu.inst[cs->nrslots].inst1 = NOP_INST1;
+	code->alu.inst[cs->nrslots].inst2 = NOP_INST2;
+	code->alu.inst[cs->nrslots].inst3 = NOP_INST3;
+	cs->nrslots++;
+}
+
+static void emit_tex(struct r300_pfs_compile_state *cs,
+		     struct prog_instruction *fpi, int opcode)
+{
+	COMPILE_STATE;
+	GLuint coord = t_src(cs, fpi->SrcReg[0]);
+	GLuint dest = undef, rdest = undef;
+	GLuint din, uin;
+	int unit = fpi->TexSrcUnit;
+	int hwsrc, hwdest;
+	GLuint tempreg = 0;
+
+	/**
+	 * Hardware uses [0..1]x[0..1] range for rectangle textures
+	 * instead of [0..Width]x[0..Height].
+	 * Add a scaling instruction.
+	 *
+	 * \todo Refactor this once we have proper rewriting/optimization
+	 * support for programs.
+	 */
+	if (opcode != R300_TEX_OP_KIL && fpi->TexSrcTarget == TEXTURE_RECT_INDEX) {
+		gl_state_index tokens[STATE_LENGTH] = {
+			STATE_INTERNAL, STATE_R300_TEXRECT_FACTOR, 0, 0,
+			0
+		};
+		int factor_index;
+		GLuint factorreg;
+
+		tokens[2] = unit;
+		factor_index =
+			_mesa_add_state_reference(fp->mesa_program.Base.
+						Parameters, tokens);
+		factorreg =
+			emit_const4fv(cs,
+				fp->mesa_program.Base.Parameters->
+				ParameterValues[factor_index]);
+		tempreg = keep(get_temp_reg(cs));
+
+		emit_arith(cs, PFS_OP_MAD, tempreg, WRITEMASK_XYZW,
+			coord, factorreg, pfs_zero, 0);
+
+		coord = tempreg;
+	}
+
+	/* Texture operations do not support swizzles etc. in hardware,
+	 * so emit an additional arithmetic operation if necessary.
+	 */
+	if (REG_GET_VSWZ(coord) != SWIZZLE_XYZ ||
+	    REG_GET_SSWZ(coord) != SWIZZLE_W ||
+	    coord & (REG_NEGV_MASK | REG_NEGS_MASK | REG_ABS_MASK)) {
+		assert(tempreg == 0);
+		tempreg = keep(get_temp_reg(cs));
+		emit_arith(cs, PFS_OP_MAD, tempreg, WRITEMASK_XYZW,
+			coord, pfs_one, pfs_zero, 0);
+		coord = tempreg;
+	}
+
+	/* Ensure correct node indirection */
+	uin = cs->used_in_node;
+	din = cs->dest_in_node;
+
+	/* Resolve source/dest to hardware registers */
+	hwsrc = t_hw_src(cs, coord, GL_TRUE);
+
+	if (opcode != R300_TEX_OP_KIL) {
+		dest = t_dst(cs, fpi->DstReg);
+
+		/* r300 doesn't seem to be able to do TEX->output reg */
+		if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
+			rdest = dest;
+			dest = get_temp_reg_tex(cs);
+		} else if (fpi->DstReg.WriteMask != WRITEMASK_XYZW) {
+			/* in case write mask isn't XYZW */
+			rdest = dest;
+			dest = get_temp_reg_tex(cs);
+		}
+		hwdest =
+		    t_hw_dst(cs, dest, GL_TRUE,
+			     code->node[code->cur_node].alu_offset);
+
+		/* Use a temp that hasn't been used in this node, rather
+		 * than causing an indirection
+		 */
+		if (uin & (1 << hwdest)) {
+			free_hw_temp(cs, hwdest);
+			hwdest = get_hw_temp_tex(cs);
+			cs->temps[REG_GET_INDEX(dest)].reg = hwdest;
+		}
+	} else {
+		hwdest = 0;
+		unit = 0;
+	}
+
+	/* Indirection if source has been written in this node, or if the
+	 * dest has been read/written in this node
+	 */
+	if ((REG_GET_TYPE(coord) != REG_TYPE_CONST &&
+	     (din & (1 << hwsrc))) || (uin & (1 << hwdest))) {
+
+		/* Finish off current node */
+		if (code->node[code->cur_node].alu_offset == cs->nrslots)
+			emit_nop(cs);
+
+		code->node[code->cur_node].alu_end =
+		    cs->nrslots - code->node[code->cur_node].alu_offset - 1;
+		assert(code->node[code->cur_node].alu_end >= 0);
+
+		if (++code->cur_node >= PFS_MAX_TEX_INDIRECT) {
+			ERROR("too many levels of texture indirection\n");
+			return;
+		}
+
+		/* Start new node */
+		code->node[code->cur_node].tex_offset = code->tex.length;
+		code->node[code->cur_node].alu_offset = cs->nrslots;
+		code->node[code->cur_node].tex_end = -1;
+		code->node[code->cur_node].alu_end = -1;
+		code->node[code->cur_node].flags = 0;
+		cs->used_in_node = 0;
+		cs->dest_in_node = 0;
+	}
+
+	if (code->cur_node == 0)
+		code->first_node_has_tex = 1;
+
+	code->tex.inst[code->tex.length++] = 0 | (hwsrc << R300_SRC_ADDR_SHIFT)
+	    | (hwdest << R300_DST_ADDR_SHIFT)
+	    | (unit << R300_TEX_ID_SHIFT)
+	    | (opcode << R300_TEX_INST_SHIFT);
+
+	cs->dest_in_node |= (1 << hwdest);
+	if (REG_GET_TYPE(coord) != REG_TYPE_CONST)
+		cs->used_in_node |= (1 << hwsrc);
+
+	code->node[code->cur_node].tex_end++;
+
+	/* Copy from temp to output if needed */
+	if (REG_GET_VALID(rdest)) {
+		emit_arith(cs, PFS_OP_MAD, rdest, fpi->DstReg.WriteMask, dest,
+			   pfs_one, pfs_zero, 0);
+		free_temp(cs, dest);
+	}
+
+	/* Free temp register */
+	if (tempreg != 0)
+		free_temp(cs, tempreg);
+}
+
+/**
+ * Returns the first slot where we could possibly allow writing to dest,
+ * according to register allocation.
+ */
+static int get_earliest_allowed_write(struct r300_pfs_compile_state *cs,
+				      GLuint dest, int mask)
+{
+	COMPILE_STATE;
+	int idx;
+	int pos;
+	GLuint index = REG_GET_INDEX(dest);
+	assert(REG_GET_VALID(dest));
+
+	switch (REG_GET_TYPE(dest)) {
+	case REG_TYPE_TEMP:
+		if (cs->temps[index].reg == -1)
+			return 0;
+
+		idx = cs->temps[index].reg;
+		break;
+	case REG_TYPE_OUTPUT:
+		return 0;
+	default:
+		ERROR("invalid dest reg type %d\n", REG_GET_TYPE(dest));
+		return 0;
+	}
+
+	pos = cs->hwtemps[idx].reserved;
+	if (mask & WRITEMASK_XYZ) {
+		if (pos < cs->hwtemps[idx].vector_lastread)
+			pos = cs->hwtemps[idx].vector_lastread;
+	}
+	if (mask & WRITEMASK_W) {
+		if (pos < cs->hwtemps[idx].scalar_lastread)
+			pos = cs->hwtemps[idx].scalar_lastread;
+	}
+
+	return pos;
+}
+
+/**
+ * Allocates a slot for an ALU instruction that can consist of
+ * a vertex part or a scalar part or both.
+ *
+ * Sources from src (src[0] to src[argc-1]) are added to the slot in the
+ * appropriate position (vector and/or scalar), and their positions are
+ * recorded in the srcpos array.
+ *
+ * This function emits instruction code for the source fetch and the
+ * argument selection. It does not emit instruction code for the
+ * opcode or the destination selection.
+ *
+ * @return the index of the slot
+ */
+static int find_and_prepare_slot(struct r300_pfs_compile_state *cs,
+				 GLboolean emit_vop,
+				 GLboolean emit_sop,
+				 int argc, GLuint * src, GLuint dest, int mask)
+{
+	COMPILE_STATE;
+	int hwsrc[3];
+	int srcpos[3];
+	unsigned int used;
+	int tempused;
+	int tempvsrc[3];
+	int tempssrc[3];
+	int pos;
+	int regnr;
+	int i, j;
+
+	// Determine instruction slots, whether sources are required on
+	// vector or scalar side, and the smallest slot number where
+	// all source registers are available
+	used = 0;
+	if (emit_vop)
+		used |= SLOT_OP_VECTOR;
+	if (emit_sop)
+		used |= SLOT_OP_SCALAR;
+
+	pos = get_earliest_allowed_write(cs, dest, mask);
+
+	if (code->node[code->cur_node].alu_offset > pos)
+		pos = code->node[code->cur_node].alu_offset;
+	for (i = 0; i < argc; ++i) {
+		if (!REG_GET_BUILTIN(src[i])) {
+			if (emit_vop)
+				used |= v_swiz[REG_GET_VSWZ(src[i])].flags << i;
+			if (emit_sop)
+				used |= s_swiz[REG_GET_SSWZ(src[i])].flags << i;
+		}
+
+		hwsrc[i] = t_hw_src(cs, src[i], GL_FALSE);	/* Note: sideeffects wrt refcounting! */
+		regnr = hwsrc[i] & 31;
+
+		if (REG_GET_TYPE(src[i]) == REG_TYPE_TEMP) {
+			if (used & (SLOT_SRC_VECTOR << i)) {
+				if (cs->hwtemps[regnr].vector_valid > pos)
+					pos = cs->hwtemps[regnr].vector_valid;
+			}
+			if (used & (SLOT_SRC_SCALAR << i)) {
+				if (cs->hwtemps[regnr].scalar_valid > pos)
+					pos = cs->hwtemps[regnr].scalar_valid;
+			}
+		}
+	}
+
+	// Find a slot that fits
+	for (;; ++pos) {
+		if (cs->slot[pos].used & used & SLOT_OP_BOTH)
+			continue;
+
+		if (pos >= cs->nrslots) {
+			if (cs->nrslots >= PFS_MAX_ALU_INST) {
+				ERROR("Out of ALU instruction slots\n");
+				return -1;
+			}
+
+			code->alu.inst[pos].inst0 = NOP_INST0;
+			code->alu.inst[pos].inst1 = NOP_INST1;
+			code->alu.inst[pos].inst2 = NOP_INST2;
+			code->alu.inst[pos].inst3 = NOP_INST3;
+
+			cs->nrslots++;
+		}
+		// Note: When we need both parts (vector and scalar) of a source,
+		// we always try to put them into the same position. This makes the
+		// code easier to read, and it is optimal (i.e. one doesn't gain
+		// anything by splitting the parts).
+		// It also avoids headaches with swizzles that access both parts (i.e WXY)
+		tempused = cs->slot[pos].used;
+		for (i = 0; i < 3; ++i) {
+			tempvsrc[i] = cs->slot[pos].vsrc[i];
+			tempssrc[i] = cs->slot[pos].ssrc[i];
+		}
+
+		for (i = 0; i < argc; ++i) {
+			int flags = (used >> i) & SLOT_SRC_BOTH;
+
+			if (!flags) {
+				srcpos[i] = 0;
+				continue;
+			}
+
+			for (j = 0; j < 3; ++j) {
+				if ((tempused >> j) & flags & SLOT_SRC_VECTOR) {
+					if (tempvsrc[j] != hwsrc[i])
+						continue;
+				}
+
+				if ((tempused >> j) & flags & SLOT_SRC_SCALAR) {
+					if (tempssrc[j] != hwsrc[i])
+						continue;
+				}
+
+				break;
+			}
+
+			if (j == 3)
+				break;
+
+			srcpos[i] = j;
+			tempused |= flags << j;
+			if (flags & SLOT_SRC_VECTOR)
+				tempvsrc[j] = hwsrc[i];
+			if (flags & SLOT_SRC_SCALAR)
+				tempssrc[j] = hwsrc[i];
+		}
+
+		if (i == argc)
+			break;
+	}
+
+	// Found a slot, reserve it
+	cs->slot[pos].used = tempused | (used & SLOT_OP_BOTH);
+	for (i = 0; i < 3; ++i) {
+		cs->slot[pos].vsrc[i] = tempvsrc[i];
+		cs->slot[pos].ssrc[i] = tempssrc[i];
+	}
+
+	for (i = 0; i < argc; ++i) {
+		if (REG_GET_TYPE(src[i]) == REG_TYPE_TEMP) {
+			int regnr = hwsrc[i] & 31;
+
+			if (used & (SLOT_SRC_VECTOR << i)) {
+				if (cs->hwtemps[regnr].vector_lastread < pos)
+					cs->hwtemps[regnr].vector_lastread =
+					    pos;
+			}
+			if (used & (SLOT_SRC_SCALAR << i)) {
+				if (cs->hwtemps[regnr].scalar_lastread < pos)
+					cs->hwtemps[regnr].scalar_lastread =
+					    pos;
+			}
+		}
+	}
+
+	// Emit the source fetch code
+	code->alu.inst[pos].inst1 &= ~R300_ALU_SRC_MASK;
+	code->alu.inst[pos].inst1 |=
+	    ((cs->slot[pos].vsrc[0] << R300_ALU_SRC0C_SHIFT) |
+	     (cs->slot[pos].vsrc[1] << R300_ALU_SRC1C_SHIFT) |
+	     (cs->slot[pos].vsrc[2] << R300_ALU_SRC2C_SHIFT));
+
+	code->alu.inst[pos].inst3 &= ~R300_ALU_SRC_MASK;
+	code->alu.inst[pos].inst3 |=
+	    ((cs->slot[pos].ssrc[0] << R300_ALU_SRC0A_SHIFT) |
+	     (cs->slot[pos].ssrc[1] << R300_ALU_SRC1A_SHIFT) |
+	     (cs->slot[pos].ssrc[2] << R300_ALU_SRC2A_SHIFT));
+
+	// Emit the argument selection code
+	if (emit_vop) {
+		int swz[3];
+
+		for (i = 0; i < 3; ++i) {
+			if (i < argc) {
+				swz[i] = (v_swiz[REG_GET_VSWZ(src[i])].base +
+					  (srcpos[i] *
+					   v_swiz[REG_GET_VSWZ(src[i])].
+					   stride)) | ((src[i] & REG_NEGV_MASK)
+						       ? ARG_NEG : 0) | ((src[i]
+									  &
+									  REG_ABS_MASK)
+									 ?
+									 ARG_ABS
+									 : 0);
+			} else {
+				swz[i] = R300_ALU_ARGC_ZERO;
+			}
+		}
+
+		code->alu.inst[pos].inst0 &=
+		    ~(R300_ALU_ARG0C_MASK | R300_ALU_ARG1C_MASK |
+		      R300_ALU_ARG2C_MASK);
+		code->alu.inst[pos].inst0 |=
+		    (swz[0] << R300_ALU_ARG0C_SHIFT) | (swz[1] <<
+							 R300_ALU_ARG1C_SHIFT)
+		    | (swz[2] << R300_ALU_ARG2C_SHIFT);
+	}
+
+	if (emit_sop) {
+		int swz[3];
+
+		for (i = 0; i < 3; ++i) {
+			if (i < argc) {
+				swz[i] = (s_swiz[REG_GET_SSWZ(src[i])].base +
+					  (srcpos[i] *
+					   s_swiz[REG_GET_SSWZ(src[i])].
+					   stride)) | ((src[i] & REG_NEGV_MASK)
+						       ? ARG_NEG : 0) | ((src[i]
+									  &
+									  REG_ABS_MASK)
+									 ?
+									 ARG_ABS
+									 : 0);
+			} else {
+				swz[i] = R300_ALU_ARGA_ZERO;
+			}
+		}
+
+		code->alu.inst[pos].inst2 &=
+		    ~(R300_ALU_ARG0A_MASK | R300_ALU_ARG1A_MASK |
+		      R300_ALU_ARG2A_MASK);
+		code->alu.inst[pos].inst2 |=
+		    (swz[0] << R300_ALU_ARG0A_SHIFT) | (swz[1] <<
+							 R300_ALU_ARG1A_SHIFT)
+		    | (swz[2] << R300_ALU_ARG2A_SHIFT);
+	}
+
+	return pos;
+}
+
+/**
+ * Append an ALU instruction to the instruction list.
+ */
+static void emit_arith(struct r300_pfs_compile_state *cs,
+		       int op,
+		       GLuint dest,
+		       int mask,
+		       GLuint src0, GLuint src1, GLuint src2, int flags)
+{
+	COMPILE_STATE;
+	GLuint src[3] = { src0, src1, src2 };
+	int hwdest;
+	GLboolean emit_vop, emit_sop;
+	int vop, sop, argc;
+	int pos;
+
+	vop = r300_fpop[op].v_op;
+	sop = r300_fpop[op].s_op;
+	argc = r300_fpop[op].argc;
+
+	if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT &&
+	    REG_GET_INDEX(dest) == FRAG_RESULT_DEPR) {
+		if (mask & WRITEMASK_Z) {
+			mask = WRITEMASK_W;
+		} else {
+			return;
+		}
+	}
+
+	emit_vop = GL_FALSE;
+	emit_sop = GL_FALSE;
+	if ((mask & WRITEMASK_XYZ) || vop == R300_ALU_OUTC_DP3)
+		emit_vop = GL_TRUE;
+	if ((mask & WRITEMASK_W) || vop == R300_ALU_OUTC_REPL_ALPHA)
+		emit_sop = GL_TRUE;
+
+	pos =
+	    find_and_prepare_slot(cs, emit_vop, emit_sop, argc, src, dest,
+				  mask);
+	if (pos < 0)
+		return;
+
+	hwdest = t_hw_dst(cs, dest, GL_FALSE, pos);	/* Note: Side effects wrt register allocation */
+
+	if (flags & PFS_FLAG_SAT) {
+		vop |= R300_ALU_OUTC_CLAMP;
+		sop |= R300_ALU_OUTA_CLAMP;
+	}
+
+	/* Throw the pieces together and get ALU/1 */
+	if (emit_vop) {
+		code->alu.inst[pos].inst0 |= vop;
+
+		code->alu.inst[pos].inst1 |= hwdest << R300_ALU_DSTC_SHIFT;
+
+		if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
+			if (REG_GET_INDEX(dest) == FRAG_RESULT_COLR) {
+				code->alu.inst[pos].inst1 |=
+				    (mask & WRITEMASK_XYZ) <<
+				    R300_ALU_DSTC_OUTPUT_MASK_SHIFT;
+			} else
+				assert(0);
+		} else {
+			code->alu.inst[pos].inst1 |=
+			    (mask & WRITEMASK_XYZ) <<
+			    R300_ALU_DSTC_REG_MASK_SHIFT;
+
+			cs->hwtemps[hwdest].vector_valid = pos + 1;
+		}
+	}
+
+	/* And now ALU/3 */
+	if (emit_sop) {
+		code->alu.inst[pos].inst2 |= sop;
+
+		if (mask & WRITEMASK_W) {
+			if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
+				if (REG_GET_INDEX(dest) == FRAG_RESULT_COLR) {
+					code->alu.inst[pos].inst3 |=
+					    (hwdest << R300_ALU_DSTA_SHIFT) |
+					    R300_ALU_DSTA_OUTPUT;
+				} else if (REG_GET_INDEX(dest) ==
+					   FRAG_RESULT_DEPR) {
+					code->alu.inst[pos].inst3 |=
+					    R300_ALU_DSTA_DEPTH;
+				} else
+					assert(0);
+			} else {
+				code->alu.inst[pos].inst3 |=
+				    (hwdest << R300_ALU_DSTA_SHIFT) |
+				    R300_ALU_DSTA_REG;
+
+				cs->hwtemps[hwdest].scalar_valid = pos + 1;
+			}
+		}
+	}
+
+	return;
+}
+
+static GLfloat SinCosConsts[2][4] = {
+	{
+	 1.273239545,		// 4/PI
+	 -0.405284735,		// -4/(PI*PI)
+	 3.141592654,		// PI
+	 0.2225			// weight
+	 },
+	{
+	 0.75,
+	 0.0,
+	 0.159154943,		// 1/(2*PI)
+	 6.283185307		// 2*PI
+	 }
+};
+
+/**
+ * Emit a LIT instruction.
+ * \p flags may be PFS_FLAG_SAT
+ *
+ * Definition of LIT (from ARB_fragment_program):
+ * tmp = VectorLoad(op0);
+ * if (tmp.x < 0) tmp.x = 0;
+ * if (tmp.y < 0) tmp.y = 0;
+ * if (tmp.w < -(128.0-epsilon)) tmp.w = -(128.0-epsilon);
+ * else if (tmp.w > 128-epsilon) tmp.w = 128-epsilon;
+ * result.x = 1.0;
+ * result.y = tmp.x;
+ * result.z = (tmp.x > 0) ? RoughApproxPower(tmp.y, tmp.w) : 0.0;
+ * result.w = 1.0;
+ *
+ * The longest path of computation is the one leading to result.z,
+ * consisting of 5 operations. This implementation of LIT takes
+ * 5 slots. So unless there's some special undocumented opcode,
+ * this implementation is potentially optimal. Unfortunately,
+ * emit_arith is a bit too conservative because it doesn't understand
+ * partial writes to the vector component.
+ */
+static const GLfloat LitConst[4] =
+    { 127.999999, 127.999999, 127.999999, -127.999999 };
+
+static void emit_lit(struct r300_pfs_compile_state *cs,
+		     GLuint dest, int mask, GLuint src, int flags)
+{
+	COMPILE_STATE;
+	GLuint cnst;
+	int needTemporary;
+	GLuint temp;
+
+	cnst = emit_const4fv(cs, LitConst);
+
+	needTemporary = 0;
+	if ((mask & WRITEMASK_XYZW) != WRITEMASK_XYZW) {
+		needTemporary = 1;
+	} else if (REG_GET_TYPE(dest) == REG_TYPE_OUTPUT) {
+		// LIT is typically followed by DP3/DP4, so there's no point
+		// in creating special code for this case
+		needTemporary = 1;
+	}
+
+	if (needTemporary) {
+		temp = keep(get_temp_reg(cs));
+	} else {
+		temp = keep(dest);
+	}
+
+	// Note: The order of emit_arith inside the slots is relevant,
+	// because emit_arith only looks at scalar vs. vector when resolving
+	// dependencies, and it does not consider individual vector components,
+	// so swizzling between the two parts can create fake dependencies.
+
+	// First slot
+	emit_arith(cs, PFS_OP_MAX, temp, WRITEMASK_XY,
+		   keep(src), pfs_zero, undef, 0);
+	emit_arith(cs, PFS_OP_MAX, temp, WRITEMASK_W, src, cnst, undef, 0);
+
+	// Second slot
+	emit_arith(cs, PFS_OP_MIN, temp, WRITEMASK_Z,
+		   swizzle(temp, W, W, W, W), cnst, undef, 0);
+	emit_arith(cs, PFS_OP_LG2, temp, WRITEMASK_W,
+		   swizzle(temp, Y, Y, Y, Y), undef, undef, 0);
+
+	// Third slot
+	// If desired, we saturate the y result here.
+	// This does not affect the use as a condition variable in the CMP later
+	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_W,
+		   temp, swizzle(temp, Z, Z, Z, Z), pfs_zero, 0);
+	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_Y,
+		   swizzle(temp, X, X, X, X), pfs_one, pfs_zero, flags);
+
+	// Fourth slot
+	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_X,
+		   pfs_one, pfs_one, pfs_zero, 0);
+	emit_arith(cs, PFS_OP_EX2, temp, WRITEMASK_W, temp, undef, undef, 0);
+
+	// Fifth slot
+	emit_arith(cs, PFS_OP_CMP, temp, WRITEMASK_Z,
+		   pfs_zero, swizzle(temp, W, W, W, W),
+		   negate(swizzle(temp, Y, Y, Y, Y)), flags);
+	emit_arith(cs, PFS_OP_MAD, temp, WRITEMASK_W, pfs_one, pfs_one,
+		   pfs_zero, 0);
+
+	if (needTemporary) {
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+			   temp, pfs_one, pfs_zero, flags);
+		free_temp(cs, temp);
+	} else {
+		// Decrease refcount of the destination
+		t_hw_dst(cs, dest, GL_FALSE, cs->nrslots);
+	}
+}
+
+static void emit_instruction(struct r300_pfs_compile_state *cs, struct prog_instruction *fpi)
+{
+	COMPILE_STATE;
+	GLuint src[3], dest, temp[2];
+	int flags, mask = 0;
+	int const_sin[2];
+
+	if (fpi->SaturateMode == SATURATE_ZERO_ONE)
+		flags = PFS_FLAG_SAT;
+	else
+		flags = 0;
+
+	if (fpi->Opcode != OPCODE_KIL) {
+		dest = t_dst(cs, fpi->DstReg);
+		mask = fpi->DstReg.WriteMask;
+	}
+
+	switch (fpi->Opcode) {
+	case OPCODE_ABS:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				absolute(src[0]), pfs_one, pfs_zero, flags);
+		break;
+	case OPCODE_ADD:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], pfs_one, src[1], flags);
+		break;
+	case OPCODE_CMP:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		src[2] = t_src(cs, fpi->SrcReg[2]);
+		/* ARB_f_p - if src0.c < 0.0 ? src1.c : src2.c
+			*    r300 - if src2.c < 0.0 ? src1.c : src0.c
+			*/
+		emit_arith(cs, PFS_OP_CMP, dest, mask,
+				src[2], src[1], src[0], flags);
+		break;
+	case OPCODE_COS:
+		/*
+			* cos using a parabola (see SIN):
+			* cos(x):
+			*   x = (x/(2*PI))+0.75
+			*   x = frac(x)
+			*   x = (x*2*PI)-PI
+			*   result = sin(x)
+			*/
+		temp[0] = get_temp_reg(cs);
+		const_sin[0] = emit_const4fv(cs, SinCosConsts[0]);
+		const_sin[1] = emit_const4fv(cs, SinCosConsts[1]);
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+
+		/* add 0.5*PI and do range reduction */
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
+				swizzle(src[0], X, X, X, X),
+				swizzle(const_sin[1], Z, Z, Z, Z),
+				swizzle(const_sin[1], X, X, X, X), 0);
+
+		emit_arith(cs, PFS_OP_FRC, temp[0], WRITEMASK_X,
+				swizzle(temp[0], X, X, X, X),
+				undef, undef, 0);
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Z, swizzle(temp[0], X, X, X, X), swizzle(const_sin[1], W, W, W, W),	//2*PI
+				negate(swizzle(const_sin[0], Z, Z, Z, Z)),	//-PI
+				0);
+
+		/* SIN */
+
+		emit_arith(cs, PFS_OP_MAD, temp[0],
+				WRITEMASK_X | WRITEMASK_Y, swizzle(temp[0],
+								Z, Z, Z,
+								Z),
+				const_sin[0], pfs_zero, 0);
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
+				swizzle(temp[0], Y, Y, Y, Y),
+				absolute(swizzle(temp[0], Z, Z, Z, Z)),
+				swizzle(temp[0], X, X, X, X), 0);
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Y,
+				swizzle(temp[0], X, X, X, X),
+				absolute(swizzle(temp[0], X, X, X, X)),
+				negate(swizzle(temp[0], X, X, X, X)), 0);
+
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				swizzle(temp[0], Y, Y, Y, Y),
+				swizzle(const_sin[0], W, W, W, W),
+				swizzle(temp[0], X, X, X, X), flags);
+
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_DP3:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_DP3, dest, mask,
+				src[0], src[1], undef, flags);
+		break;
+	case OPCODE_DP4:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_DP4, dest, mask,
+				src[0], src[1], undef, flags);
+		break;
+	case OPCODE_DPH:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		/* src0.xyz1 -> temp
+			* DP4 dest, temp, src1
+			*/
+		emit_arith(cs, PFS_OP_DP4, dest, mask,
+				swizzle(src[0], X, Y, Z, ONE), src[1],
+				undef, flags);
+		break;
+	case OPCODE_DST:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		/* dest.y = src0.y * src1.y */
+		if (mask & WRITEMASK_Y)
+			emit_arith(cs, PFS_OP_MAD, dest, WRITEMASK_Y,
+					keep(src[0]), keep(src[1]),
+					pfs_zero, flags);
+		/* dest.z = src0.z */
+		if (mask & WRITEMASK_Z)
+			emit_arith(cs, PFS_OP_MAD, dest, WRITEMASK_Z,
+					src[0], pfs_one, pfs_zero, flags);
+		/* result.x = 1.0
+			* result.w = src1.w */
+		if (mask & WRITEMASK_XW) {
+			REG_SET_VSWZ(src[1], SWIZZLE_111);	/*Cheat */
+			emit_arith(cs, PFS_OP_MAD, dest,
+					mask & WRITEMASK_XW,
+					src[1], pfs_one, pfs_zero, flags);
+		}
+		break;
+	case OPCODE_EX2:
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_EX2, dest, mask,
+				src[0], undef, undef, flags);
+		break;
+	case OPCODE_FLR:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		temp[0] = get_temp_reg(cs);
+		/* FRC temp, src0
+			* MAD dest, src0, 1.0, -temp
+			*/
+		emit_arith(cs, PFS_OP_FRC, temp[0], mask,
+				keep(src[0]), undef, undef, 0);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], pfs_one, negate(temp[0]), flags);
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_FRC:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_FRC, dest, mask,
+				src[0], undef, undef, flags);
+		break;
+	case OPCODE_KIL:
+		emit_tex(cs, fpi, R300_TEX_OP_KIL);
+		break;
+	case OPCODE_LG2:
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_LG2, dest, mask,
+				src[0], undef, undef, flags);
+		break;
+	case OPCODE_LIT:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		emit_lit(cs, dest, mask, src[0], flags);
+		break;
+	case OPCODE_LRP:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		src[2] = t_src(cs, fpi->SrcReg[2]);
+		/* result = tmp0tmp1 + (1 - tmp0)tmp2
+			*        = tmp0tmp1 + tmp2 + (-tmp0)tmp2
+			*     MAD temp, -tmp0, tmp2, tmp2
+			*     MAD result, tmp0, tmp1, temp
+			*/
+		temp[0] = get_temp_reg(cs);
+		emit_arith(cs, PFS_OP_MAD, temp[0], mask,
+				negate(keep(src[0])), keep(src[2]), src[2],
+				0);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], src[1], temp[0], flags);
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_MAD:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		src[2] = t_src(cs, fpi->SrcReg[2]);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], src[1], src[2], flags);
+		break;
+	case OPCODE_MAX:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_MAX, dest, mask,
+				src[0], src[1], undef, flags);
+		break;
+	case OPCODE_MIN:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_MIN, dest, mask,
+				src[0], src[1], undef, flags);
+		break;
+	case OPCODE_MOV:
+	case OPCODE_SWZ:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], pfs_one, pfs_zero, flags);
+		break;
+	case OPCODE_MUL:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], src[1], pfs_zero, flags);
+		break;
+	case OPCODE_POW:
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+		src[1] = t_scalar_src(cs, fpi->SrcReg[1]);
+		temp[0] = get_temp_reg(cs);
+		emit_arith(cs, PFS_OP_LG2, temp[0], WRITEMASK_W,
+				src[0], undef, undef, 0);
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_W,
+				temp[0], src[1], pfs_zero, 0);
+		emit_arith(cs, PFS_OP_EX2, dest, fpi->DstReg.WriteMask,
+				temp[0], undef, undef, 0);
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_RCP:
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_RCP, dest, mask,
+				src[0], undef, undef, flags);
+		break;
+	case OPCODE_RSQ:
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+		emit_arith(cs, PFS_OP_RSQ, dest, mask,
+				absolute(src[0]), pfs_zero, pfs_zero, flags);
+		break;
+	case OPCODE_SCS:
+		/*
+			* scs using a parabola :
+			* scs(x):
+			*   result.x = sin(-abs(x)+0.5*PI)  (cos)
+			*   result.y = sin(x)               (sin)
+			*
+			*/
+		temp[0] = get_temp_reg(cs);
+		temp[1] = get_temp_reg(cs);
+		const_sin[0] = emit_const4fv(cs, SinCosConsts[0]);
+		const_sin[1] = emit_const4fv(cs, SinCosConsts[1]);
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+
+		/* x = -abs(x)+0.5*PI */
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Z, swizzle(const_sin[0], Z, Z, Z, Z),	//PI
+				pfs_half,
+				negate(abs
+					(swizzle(keep(src[0]), X, X, X, X))),
+				0);
+
+		/* C*x (sin) */
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_W,
+				swizzle(const_sin[0], Y, Y, Y, Y),
+				swizzle(keep(src[0]), X, X, X, X),
+				pfs_zero, 0);
+
+		/* B*x, C*x (cos) */
+		emit_arith(cs, PFS_OP_MAD, temp[0],
+				WRITEMASK_X | WRITEMASK_Y, swizzle(temp[0],
+								Z, Z, Z,
+								Z),
+				const_sin[0], pfs_zero, 0);
+
+		/* B*x (sin) */
+		emit_arith(cs, PFS_OP_MAD, temp[1], WRITEMASK_W,
+				swizzle(const_sin[0], X, X, X, X),
+				keep(src[0]), pfs_zero, 0);
+
+		/* y = B*x + C*x*abs(x) (sin) */
+		emit_arith(cs, PFS_OP_MAD, temp[1], WRITEMASK_Z,
+				absolute(src[0]),
+				swizzle(temp[0], W, W, W, W),
+				swizzle(temp[1], W, W, W, W), 0);
+
+		/* y = B*x + C*x*abs(x) (cos) */
+		emit_arith(cs, PFS_OP_MAD, temp[1], WRITEMASK_W,
+				swizzle(temp[0], Y, Y, Y, Y),
+				absolute(swizzle(temp[0], Z, Z, Z, Z)),
+				swizzle(temp[0], X, X, X, X), 0);
+
+		/* y*abs(y) - y (cos), y*abs(y) - y (sin) */
+		emit_arith(cs, PFS_OP_MAD, temp[0],
+				WRITEMASK_X | WRITEMASK_Y, swizzle(temp[1],
+								W, Z, Y,
+								X),
+				absolute(swizzle(temp[1], W, Z, Y, X)),
+				negate(swizzle(temp[1], W, Z, Y, X)), 0);
+
+		/* dest.xy = mad(temp.xy, P, temp2.wz) */
+		emit_arith(cs, PFS_OP_MAD, dest,
+				mask & (WRITEMASK_X | WRITEMASK_Y), temp[0],
+				swizzle(const_sin[0], W, W, W, W),
+				swizzle(temp[1], W, Z, Y, X), flags);
+
+		free_temp(cs, temp[0]);
+		free_temp(cs, temp[1]);
+		break;
+	case OPCODE_SGE:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		temp[0] = get_temp_reg(cs);
+		/* temp = src0 - src1
+			* dest.c = (temp.c < 0.0) ? 0 : 1
+			*/
+		emit_arith(cs, PFS_OP_MAD, temp[0], mask,
+				src[0], pfs_one, negate(src[1]), 0);
+		emit_arith(cs, PFS_OP_CMP, dest, mask,
+				pfs_one, pfs_zero, temp[0], 0);
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_SIN:
+		/*
+			*  using a parabola:
+			* sin(x) = 4/pi * x + -4/(pi*pi) * x * abs(x)
+			* extra precision is obtained by weighting against
+			* itself squared.
+			*/
+
+		temp[0] = get_temp_reg(cs);
+		const_sin[0] = emit_const4fv(cs, SinCosConsts[0]);
+		const_sin[1] = emit_const4fv(cs, SinCosConsts[1]);
+		src[0] = t_scalar_src(cs, fpi->SrcReg[0]);
+
+		/* do range reduction */
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
+				swizzle(keep(src[0]), X, X, X, X),
+				swizzle(const_sin[1], Z, Z, Z, Z),
+				pfs_half, 0);
+
+		emit_arith(cs, PFS_OP_FRC, temp[0], WRITEMASK_X,
+				swizzle(temp[0], X, X, X, X),
+				undef, undef, 0);
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Z, swizzle(temp[0], X, X, X, X), swizzle(const_sin[1], W, W, W, W),	//2*PI
+				negate(swizzle(const_sin[0], Z, Z, Z, Z)),	//PI
+				0);
+
+		/* SIN */
+
+		emit_arith(cs, PFS_OP_MAD, temp[0],
+				WRITEMASK_X | WRITEMASK_Y, swizzle(temp[0],
+								Z, Z, Z,
+								Z),
+				const_sin[0], pfs_zero, 0);
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_X,
+				swizzle(temp[0], Y, Y, Y, Y),
+				absolute(swizzle(temp[0], Z, Z, Z, Z)),
+				swizzle(temp[0], X, X, X, X), 0);
+
+		emit_arith(cs, PFS_OP_MAD, temp[0], WRITEMASK_Y,
+				swizzle(temp[0], X, X, X, X),
+				absolute(swizzle(temp[0], X, X, X, X)),
+				negate(swizzle(temp[0], X, X, X, X)), 0);
+
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				swizzle(temp[0], Y, Y, Y, Y),
+				swizzle(const_sin[0], W, W, W, W),
+				swizzle(temp[0], X, X, X, X), flags);
+
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_SLT:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		temp[0] = get_temp_reg(cs);
+		/* temp = src0 - src1
+			* dest.c = (temp.c < 0.0) ? 1 : 0
+			*/
+		emit_arith(cs, PFS_OP_MAD, temp[0], mask,
+				src[0], pfs_one, negate(src[1]), 0);
+		emit_arith(cs, PFS_OP_CMP, dest, mask,
+				pfs_zero, pfs_one, temp[0], 0);
+		free_temp(cs, temp[0]);
+		break;
+	case OPCODE_SUB:
+		src[0] = t_src(cs, fpi->SrcReg[0]);
+		src[1] = t_src(cs, fpi->SrcReg[1]);
+		emit_arith(cs, PFS_OP_MAD, dest, mask,
+				src[0], pfs_one, negate(src[1]), flags);
+		break;
+	case OPCODE_TEX:
+		emit_tex(cs, fpi, R300_TEX_OP_LD);
+		break;
+	case OPCODE_TXB:
+		emit_tex(cs, fpi, R300_TEX_OP_TXB);
+		break;
+	case OPCODE_TXP:
+		emit_tex(cs, fpi, R300_TEX_OP_TXP);
+		break;
+	case OPCODE_XPD:{
+			src[0] = t_src(cs, fpi->SrcReg[0]);
+			src[1] = t_src(cs, fpi->SrcReg[1]);
+			temp[0] = get_temp_reg(cs);
+			/* temp = src0.zxy * src1.yzx */
+			emit_arith(cs, PFS_OP_MAD, temp[0],
+					WRITEMASK_XYZ, swizzle(keep(src[0]),
+								Z, X, Y, W),
+					swizzle(keep(src[1]), Y, Z, X, W),
+					pfs_zero, 0);
+			/* dest.xyz = src0.yzx * src1.zxy - temp
+				* dest.w       = undefined
+				* */
+			emit_arith(cs, PFS_OP_MAD, dest,
+					mask & WRITEMASK_XYZ, swizzle(src[0],
+									Y, Z,
+									X, W),
+					swizzle(src[1], Z, X, Y, W),
+					negate(temp[0]), flags);
+			/* cleanup */
+			free_temp(cs, temp[0]);
+			break;
+		}
+	default:
+		ERROR("unknown fpi->Opcode %d\n", fpi->Opcode);
+		break;
+	}
+}
+
+static GLboolean parse_program(struct r300_pfs_compile_state *cs)
+{
+	COMPILE_STATE;
+	int clauseidx;
+
+	for (clauseidx = 0; clauseidx < cs->compiler->compiler.NumClauses; ++clauseidx) {
+		struct radeon_clause* clause = &cs->compiler->compiler.Clauses[clauseidx];
+		int ip;
+
+		for(ip = 0; ip < clause->NumInstructions; ++ip) {
+			emit_instruction(cs, clause->Instructions + ip);
+
+			if (fp->error)
+				return GL_FALSE;
+		}
+	}
+
+	return GL_TRUE;
+}
+
+
+/* - Init structures
+ * - Determine what hwregs each input corresponds to
+ */
+static void init_program(struct r300_pfs_compile_state *cs)
+{
+	COMPILE_STATE;
+	struct gl_fragment_program *mp = &fp->mesa_program;
+	GLuint InputsRead = mp->Base.InputsRead;
+	GLuint temps_used = 0;	/* for fp->temps[] */
+	int i, j;
+
+	/* New compile, reset tracking data */
+	fp->optimization =
+	    driQueryOptioni(&cs->compiler->r300->radeon.optionCache, "fp_optimization");
+	fp->translated = GL_FALSE;
+	fp->error = GL_FALSE;
+	fp->WritesDepth = GL_FALSE;
+	code->tex.length = 0;
+	code->cur_node = 0;
+	code->first_node_has_tex = 0;
+	code->const_nr = 0;
+	code->max_temp_idx = 0;
+	code->node[0].alu_end = -1;
+	code->node[0].tex_end = -1;
+
+	for (i = 0; i < PFS_MAX_ALU_INST; i++) {
+		for (j = 0; j < 3; j++) {
+			cs->slot[i].vsrc[j] = SRC_CONST;
+			cs->slot[i].ssrc[j] = SRC_CONST;
+		}
+	}
+
+	/* Work out what temps the Mesa inputs correspond to, this must match
+	 * what setup_rs_unit does, which shouldn't be a problem as rs_unit
+	 * configures itself based on the fragprog's InputsRead
+	 *
+	 * NOTE: this depends on get_hw_temp() allocating registers in order,
+	 * starting from register 0.
+	 */
+
+	/* Texcoords come first */
+	for (i = 0; i < cs->compiler->r300->radeon.glCtx->Const.MaxTextureUnits; i++) {
+		if (InputsRead & (FRAG_BIT_TEX0 << i)) {
+			cs->inputs[FRAG_ATTRIB_TEX0 + i].refcount = 0;
+			cs->inputs[FRAG_ATTRIB_TEX0 + i].reg =
+			    get_hw_temp(cs, 0);
+		}
+	}
+	InputsRead &= ~FRAG_BITS_TEX_ANY;
+
+	/* fragment position treated as a texcoord */
+	if (InputsRead & FRAG_BIT_WPOS) {
+		cs->inputs[FRAG_ATTRIB_WPOS].refcount = 0;
+		cs->inputs[FRAG_ATTRIB_WPOS].reg = get_hw_temp(cs, 0);
+	}
+	InputsRead &= ~FRAG_BIT_WPOS;
+
+	/* Then primary colour */
+	if (InputsRead & FRAG_BIT_COL0) {
+		cs->inputs[FRAG_ATTRIB_COL0].refcount = 0;
+		cs->inputs[FRAG_ATTRIB_COL0].reg = get_hw_temp(cs, 0);
+	}
+	InputsRead &= ~FRAG_BIT_COL0;
+
+	/* Secondary color */
+	if (InputsRead & FRAG_BIT_COL1) {
+		cs->inputs[FRAG_ATTRIB_COL1].refcount = 0;
+		cs->inputs[FRAG_ATTRIB_COL1].reg = get_hw_temp(cs, 0);
+	}
+	InputsRead &= ~FRAG_BIT_COL1;
+
+	/* Anything else */
+	if (InputsRead) {
+		WARN_ONCE("Don't know how to handle inputs 0x%x\n", InputsRead);
+		/* force read from hwreg 0 for now */
+		for (i = 0; i < 32; i++)
+			if (InputsRead & (1 << i))
+				cs->inputs[i].reg = 0;
+	}
+
+	/* Pre-parse the program, grabbing refcounts on input/temp regs.
+	 * That way, we can free up the reg when it's no longer needed
+	 */
+	for (i = 0; i < cs->compiler->compiler.Clauses[0].NumInstructions; ++i) {
+		struct prog_instruction *fpi = cs->compiler->compiler.Clauses[0].Instructions + i;
+		int idx;
+
+		for (j = 0; j < 3; j++) {
+			idx = fpi->SrcReg[j].Index;
+			switch (fpi->SrcReg[j].File) {
+			case PROGRAM_TEMPORARY:
+				if (!(temps_used & (1 << idx))) {
+					cs->temps[idx].reg = -1;
+					cs->temps[idx].refcount = 1;
+					temps_used |= (1 << idx);
+				} else
+					cs->temps[idx].refcount++;
+				break;
+			case PROGRAM_INPUT:
+				cs->inputs[idx].refcount++;
+				break;
+			default:
+				break;
+			}
+		}
+
+		idx = fpi->DstReg.Index;
+		if (fpi->DstReg.File == PROGRAM_TEMPORARY) {
+			if (!(temps_used & (1 << idx))) {
+				cs->temps[idx].reg = -1;
+				cs->temps[idx].refcount = 1;
+				temps_used |= (1 << idx);
+			} else
+				cs->temps[idx].refcount++;
+		}
+	}
+	cs->temp_in_use = temps_used;
+}
+
+
+/**
+ * Final compilation step: Turn the intermediate radeon_program into
+ * machine-readable instructions.
+ */
+GLboolean r300FragmentProgramEmit(struct r300_fragment_program_compiler *compiler)
+{
+	struct r300_pfs_compile_state cs;
+	struct r300_fragment_program_code *code = compiler->code;
+
+	_mesa_memset(&cs, 0, sizeof(cs));
+	cs.compiler = compiler;
+	init_program(&cs);
+
+	if (!parse_program(&cs))
+		return GL_FALSE;
+
+	/* Finish off */
+	code->node[code->cur_node].alu_end =
+		cs.nrslots - code->node[code->cur_node].alu_offset - 1;
+	if (code->node[code->cur_node].tex_end < 0)
+		code->node[code->cur_node].tex_end = 0;
+	code->alu_offset = 0;
+	code->alu_end = cs.nrslots - 1;
+	code->tex_offset = 0;
+	code->tex_end = code->tex.length ? code->tex.length - 1 : 0;
+	assert(code->node[code->cur_node].alu_end >= 0);
+	assert(code->alu_end >= 0);
+
+	return GL_TRUE;
+}
+
diff --git a/src/mesa/drivers/dri/r300/radeon_program.c b/src/mesa/drivers/dri/r300/radeon_program.c
new file mode 100644
index 00000000000..7b03fa65236
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/radeon_program.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2008 Nicolai Haehnle.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "radeon_program.h"
+
+
+/**
+ * Initialize a compiler structure with a single mixed clause
+ * containing all instructions from the source program.
+ */
+void radeonCompilerInit(
+	struct radeon_compiler *compiler,
+	GLcontext *ctx,
+	struct gl_program *source)
+{
+	struct radeon_clause* clause;
+
+	_mesa_memset(compiler, 0, sizeof(*compiler));
+	compiler->Source = source;
+	compiler->Ctx = ctx;
+
+	compiler->NumTemporaries = source->NumTemporaries;
+
+	clause = radeonCompilerInsertClause(compiler, 0, CLAUSE_MIXED);
+	clause->NumInstructions = 0;
+	while(source->Instructions[clause->NumInstructions].Opcode != OPCODE_END)
+		clause->NumInstructions++;
+	clause->ReservedInstructions = clause->NumInstructions;
+	clause->Instructions = _mesa_alloc_instructions(clause->NumInstructions);
+	_mesa_copy_instructions(clause->Instructions, source->Instructions, clause->NumInstructions);
+}
+
+
+/**
+ * Free all data that is referenced by the compiler structure.
+ * However, the compiler structure itself is not freed.
+ */
+void radeonCompilerCleanup(struct radeon_compiler *compiler)
+{
+	radeonCompilerEraseClauses(compiler, 0, compiler->NumClauses);
+}
+
+
+/**
+ * Allocate and return a unique temporary register.
+ */
+int radeonCompilerAllocateTemporary(struct radeon_compiler *compiler)
+{
+	if (compiler->NumTemporaries >= 256) {
+		_mesa_problem(compiler->Ctx, "radeonCompiler: Too many temporaries");
+		return 0;
+	}
+
+	return compiler->NumTemporaries++;
+}
+
+
+/**
+ * \p position index of the new clause; later clauses are moved
+ * \p type of the new clause; one of CLAUSE_XXX
+ * \return a pointer to the new clause
+ */
+struct radeon_clause* radeonCompilerInsertClause(
+	struct radeon_compiler *compiler,
+	int position, int type)
+{
+	struct radeon_clause* oldClauses = compiler->Clauses;
+	struct radeon_clause* clause;
+
+	assert(position >= 0 && position <= compiler->NumClauses);
+
+	compiler->Clauses = (struct radeon_clause *)
+		_mesa_malloc((compiler->NumClauses+1) * sizeof(struct radeon_clause));
+	if (oldClauses) {
+		_mesa_memcpy(compiler->Clauses, oldClauses,
+			position*sizeof(struct radeon_clause));
+		_mesa_memcpy(compiler->Clauses+position+1, oldClauses+position,
+			(compiler->NumClauses - position) * sizeof(struct radeon_clause));
+		_mesa_free(oldClauses);
+	}
+	compiler->NumClauses++;
+
+	clause = compiler->Clauses + position;
+	_mesa_memset(clause, 0, sizeof(*clause));
+	clause->Type = type;
+
+	return clause;
+}
+
+
+/**
+ * Remove clauses in the range [start, end)
+ */
+void radeonCompilerEraseClauses(
+	struct radeon_compiler *compiler,
+	int start, int end)
+{
+	struct radeon_clause* oldClauses = compiler->Clauses;
+	int i;
+
+	assert(0 <= start);
+	assert(start <= end);
+	assert(end <= compiler->NumClauses);
+
+	if (end == start)
+		return;
+
+	for(i = start; i < end; ++i) {
+		struct radeon_clause* clause = oldClauses + i;
+		_mesa_free_instructions(clause->Instructions, clause->NumInstructions);
+	}
+
+	if (start > 0 || end < compiler->NumClauses) {
+		compiler->Clauses = (struct radeon_clause*)
+			_mesa_malloc((compiler->NumClauses+start-end) * sizeof(struct radeon_clause));
+		_mesa_memcpy(compiler->Clauses, oldClauses,
+			start * sizeof(struct radeon_clause));
+		_mesa_memcpy(compiler->Clauses + start, oldClauses + end,
+			(compiler->NumClauses - end) * sizeof(struct radeon_clause));
+		compiler->NumClauses -= end - start;
+	} else {
+		compiler->Clauses = 0;
+		compiler->NumClauses = 0;
+	}
+
+	_mesa_free(oldClauses);
+}
diff --git a/src/mesa/drivers/dri/r300/radeon_program.h b/src/mesa/drivers/dri/r300/radeon_program.h
new file mode 100644
index 00000000000..18091ac02ad
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/radeon_program.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2008 Nicolai Haehnle.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __RADEON_PROGRAM_H_
+#define __RADEON_PROGRAM_H_
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+#include "shader/program.h"
+#include "shader/prog_instruction.h"
+
+
+enum {
+	CLAUSE_MIXED = 0,
+	CLAUSE_ALU,
+	CLAUSE_TEX
+};
+
+/**
+ * A clause is simply a sequence of instructions that are executed
+ * in order.
+ */
+struct radeon_clause {
+	/**
+	 * Type of this clause, one of CLAUSE_XXX.
+	 */
+	int Type : 2;
+
+	/**
+	 * Pointer to an array of instructions.
+	 * The array is terminated by an OPCODE_END instruction.
+	 */
+	struct prog_instruction *Instructions;
+
+	/**
+	 * Number of instructions in this clause.
+	 */
+	int NumInstructions;
+
+	/**
+	 * Space reserved for instructions in this clause.
+	 */
+	int ReservedInstructions;
+};
+
+/**
+ * A compile object, holding the current intermediate state during compilation.
+ */
+struct radeon_compiler {
+	struct gl_program *Source;
+	GLcontext* Ctx;
+
+	/**
+	 * Number of clauses in this program.
+	 */
+	int NumClauses;
+
+	/**
+	 * Pointer to an array of NumClauses clauses.
+	 */
+	struct radeon_clause *Clauses;
+
+	/**
+	 * Number of registers in the PROGRAM_TEMPORARIES file.
+	 */
+	int NumTemporaries;
+};
+
+void radeonCompilerInit(
+	struct radeon_compiler *compiler,
+	GLcontext *ctx,
+	struct gl_program *source);
+void radeonCompilerCleanup(struct radeon_compiler *compiler);
+int radeonCompilerAllocateTemporary(struct radeon_compiler *compiler);
+
+struct radeon_clause *radeonCompilerInsertClause(
+	struct radeon_compiler *compiler,
+	int position,
+	int type);
+void radeonCompilerEraseClauses(
+	struct radeon_compiler *compiler,
+	int start,
+	int end);
+
+#endif