diff options
Diffstat (limited to 'src/mesa/shader/slang/slang_emit.c')
| -rw-r--r-- | src/mesa/shader/slang/slang_emit.c | 2666 |
1 files changed, 0 insertions, 2666 deletions
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c deleted file mode 100644 index 4d4c611dfe4..00000000000 --- a/src/mesa/shader/slang/slang_emit.c +++ /dev/null @@ -1,2666 +0,0 @@ -/* - * Mesa 3-D graphics library - * - * Copyright (C) 2005-2008 Brian Paul All Rights Reserved. - * Copyright (C) 2008 VMware, Inc. 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 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 - * BRIAN PAUL 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 slang_emit.c - * Emit program instructions (PI code) from IR trees. - * \author Brian Paul - */ - -/*** - *** NOTES - *** - *** To emit GPU instructions, we basically just do an in-order traversal - *** of the IR tree. - ***/ - - -#include "main/imports.h" -#include "main/context.h" -#include "shader/program.h" -#include "shader/prog_instruction.h" -#include "shader/prog_parameter.h" -#include "shader/prog_print.h" -#include "slang_builtin.h" -#include "slang_emit.h" -#include "slang_mem.h" - - -#define PEEPHOLE_OPTIMIZATIONS 1 -#define ANNOTATE 0 - - -typedef struct -{ - slang_info_log *log; - slang_var_table *vt; - struct gl_program *prog; - struct gl_program **Subroutines; - GLuint NumSubroutines; - - GLuint MaxInstructions; /**< size of prog->Instructions[] buffer */ - - GLboolean UnresolvedFunctions; - - /* code-gen options */ - GLboolean EmitHighLevelInstructions; - GLboolean EmitCondCodes; - GLboolean EmitComments; - GLboolean EmitBeginEndSub; /* XXX TEMPORARY */ -} slang_emit_info; - - - -static struct gl_program * -new_subroutine(slang_emit_info *emitInfo, GLuint *id) -{ - GET_CURRENT_CONTEXT(ctx); - const GLuint n = emitInfo->NumSubroutines; - - emitInfo->Subroutines = (struct gl_program **) - _mesa_realloc(emitInfo->Subroutines, - n * sizeof(struct gl_program *), - (n + 1) * sizeof(struct gl_program *)); - emitInfo->Subroutines[n] = ctx->Driver.NewProgram(ctx, emitInfo->prog->Target, 0); - emitInfo->Subroutines[n]->Parameters = emitInfo->prog->Parameters; - emitInfo->NumSubroutines++; - *id = n; - return emitInfo->Subroutines[n]; -} - - -/** - * Convert a writemask to a swizzle. Used for testing cond codes because - * we only want to test the cond code component(s) that was set by the - * previous instruction. - */ -static GLuint -writemask_to_swizzle(GLuint writemask) -{ - if (writemask == WRITEMASK_X) - return SWIZZLE_XXXX; - if (writemask == WRITEMASK_Y) - return SWIZZLE_YYYY; - if (writemask == WRITEMASK_Z) - return SWIZZLE_ZZZZ; - if (writemask == WRITEMASK_W) - return SWIZZLE_WWWW; - return SWIZZLE_XYZW; /* shouldn't be hit */ -} - - -/** - * Convert a swizzle mask to a writemask. - * Note that the slang_ir_storage->Swizzle field can represent either a - * swizzle mask or a writemask, depending on how it's used. For example, - * when we parse "direction.yz" alone, we don't know whether .yz is a - * writemask or a swizzle. In this case, we encode ".yz" in store->Swizzle - * as a swizzle mask (.yz?? actually). Later, if direction.yz is used as - * an R-value, we use store->Swizzle as-is. Otherwise, if direction.yz is - * used as an L-value, we convert it to a writemask. - */ -static GLuint -swizzle_to_writemask(GLuint swizzle) -{ - GLuint i, writemask = 0x0; - for (i = 0; i < 4; i++) { - GLuint swz = GET_SWZ(swizzle, i); - if (swz <= SWIZZLE_W) { - writemask |= (1 << swz); - } - } - return writemask; -} - - -/** - * Swizzle a swizzle (function composition). - * That is, return swz2(swz1), or said another way: swz1.szw2 - * Example: swizzle_swizzle(".zwxx", ".xxyw") yields ".zzwx" - */ -GLuint -_slang_swizzle_swizzle(GLuint swz1, GLuint swz2) -{ - GLuint i, swz, s[4]; - for (i = 0; i < 4; i++) { - GLuint c = GET_SWZ(swz2, i); - if (c <= SWIZZLE_W) - s[i] = GET_SWZ(swz1, c); - else - s[i] = c; - } - swz = MAKE_SWIZZLE4(s[0], s[1], s[2], s[3]); - return swz; -} - - -/** - * Return the default swizzle mask for accessing a variable of the - * given size (in floats). If size = 1, comp is used to identify - * which component [0..3] of the register holds the variable. - */ -GLuint -_slang_var_swizzle(GLint size, GLint comp) -{ - switch (size) { - case 1: - return MAKE_SWIZZLE4(comp, SWIZZLE_NIL, SWIZZLE_NIL, SWIZZLE_NIL); - case 2: - return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_NIL, SWIZZLE_NIL); - case 3: - return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_NIL); - default: - return SWIZZLE_XYZW; - } -} - - - -/** - * Allocate storage for the given node (if it hasn't already been allocated). - * - * Typically this is temporary storage for an intermediate result (such as - * for a multiply or add, etc). - * - * If n->Store does not exist it will be created and will be of the size - * specified by defaultSize. - */ -static GLboolean -alloc_node_storage(slang_emit_info *emitInfo, slang_ir_node *n, - GLint defaultSize) -{ - assert(!n->Var); - if (!n->Store) { - assert(defaultSize > 0); - n->Store = _slang_new_ir_storage(PROGRAM_TEMPORARY, -1, defaultSize); - if (!n->Store) { - return GL_FALSE; - } - } - - /* now allocate actual register(s). I.e. set n->Store->Index >= 0 */ - if (n->Store->Index < 0) { - if (!_slang_alloc_temp(emitInfo->vt, n->Store)) { - slang_info_log_error(emitInfo->log, - "Ran out of registers, too many temporaries"); - _slang_free(n->Store); - n->Store = NULL; - return GL_FALSE; - } - } - return GL_TRUE; -} - - -/** - * Free temporary storage, if n->Store is, in fact, temp storage. - * Otherwise, no-op. - */ -static void -free_node_storage(slang_var_table *vt, slang_ir_node *n) -{ - if (n->Store->File == PROGRAM_TEMPORARY && - n->Store->Index >= 0 && - n->Opcode != IR_SWIZZLE) { - if (_slang_is_temp(vt, n->Store)) { - _slang_free_temp(vt, n->Store); - n->Store->Index = -1; - n->Store = NULL; /* XXX this may not be needed */ - } - } -} - - -/** - * Helper function to allocate a short-term temporary. - * Free it with _slang_free_temp(). - */ -static GLboolean -alloc_local_temp(slang_emit_info *emitInfo, slang_ir_storage *temp, GLint size) -{ - assert(size >= 1); - assert(size <= 4); - memset(temp, 0, sizeof(*temp)); - temp->Size = size; - temp->File = PROGRAM_TEMPORARY; - temp->Index = -1; - return _slang_alloc_temp(emitInfo->vt, temp); -} - - -/** - * Remove any SWIZZLE_NIL terms from given swizzle mask. - * For a swizzle like .z??? generate .zzzz (replicate single component). - * Else, for .wx?? generate .wxzw (insert default component for the position). - */ -static GLuint -fix_swizzle(GLuint swizzle) -{ - GLuint c0 = GET_SWZ(swizzle, 0), - c1 = GET_SWZ(swizzle, 1), - c2 = GET_SWZ(swizzle, 2), - c3 = GET_SWZ(swizzle, 3); - if (c1 == SWIZZLE_NIL && c2 == SWIZZLE_NIL && c3 == SWIZZLE_NIL) { - /* smear first component across all positions */ - c1 = c2 = c3 = c0; - } - else { - /* insert default swizzle components */ - if (c0 == SWIZZLE_NIL) - c0 = SWIZZLE_X; - if (c1 == SWIZZLE_NIL) - c1 = SWIZZLE_Y; - if (c2 == SWIZZLE_NIL) - c2 = SWIZZLE_Z; - if (c3 == SWIZZLE_NIL) - c3 = SWIZZLE_W; - } - return MAKE_SWIZZLE4(c0, c1, c2, c3); -} - - - -/** - * Convert IR storage to an instruction dst register. - */ -static void -storage_to_dst_reg(struct prog_dst_register *dst, const slang_ir_storage *st) -{ - const GLboolean relAddr = st->RelAddr; - const GLint size = st->Size; - GLint index = st->Index; - GLuint swizzle = st->Swizzle; - - assert(index >= 0); - /* if this is storage relative to some parent storage, walk up the tree */ - while (st->Parent) { - st = st->Parent; - assert(st->Index >= 0); - index += st->Index; - swizzle = _slang_swizzle_swizzle(st->Swizzle, swizzle); - } - - assert(st->File != PROGRAM_UNDEFINED); - dst->File = st->File; - - assert(index >= 0); - dst->Index = index; - - assert(size >= 1); - assert(size <= 4); - - if (swizzle != SWIZZLE_XYZW) { - dst->WriteMask = swizzle_to_writemask(swizzle); - } - else { - switch (size) { - case 1: - dst->WriteMask = WRITEMASK_X << GET_SWZ(st->Swizzle, 0); - break; - case 2: - dst->WriteMask = WRITEMASK_XY; - break; - case 3: - dst->WriteMask = WRITEMASK_XYZ; - break; - case 4: - dst->WriteMask = WRITEMASK_XYZW; - break; - default: - ; /* error would have been caught above */ - } - } - - dst->RelAddr = relAddr; -} - - -/** - * Convert IR storage to an instruction src register. - */ -static void -storage_to_src_reg(struct prog_src_register *src, const slang_ir_storage *st) -{ - const GLboolean relAddr = st->RelAddr; - GLint index = st->Index; - GLuint swizzle = st->Swizzle; - - /* if this is storage relative to some parent storage, walk up the tree */ - assert(index >= 0); - while (st->Parent) { - st = st->Parent; - if (st->Index < 0) { - /* an error should have been reported already */ - return; - } - assert(st->Index >= 0); - index += st->Index; - swizzle = _slang_swizzle_swizzle(fix_swizzle(st->Swizzle), swizzle); - } - - assert(st->File >= 0); -#if 1 /* XXX temporary */ - if (st->File == PROGRAM_UNDEFINED) { - slang_ir_storage *st0 = (slang_ir_storage *) st; - st0->File = PROGRAM_TEMPORARY; - } -#endif - assert(st->File < PROGRAM_FILE_MAX); - src->File = st->File; - - assert(index >= 0); - src->Index = index; - - swizzle = fix_swizzle(swizzle); - assert(GET_SWZ(swizzle, 0) <= SWIZZLE_W); - assert(GET_SWZ(swizzle, 1) <= SWIZZLE_W); - assert(GET_SWZ(swizzle, 2) <= SWIZZLE_W); - assert(GET_SWZ(swizzle, 3) <= SWIZZLE_W); - src->Swizzle = swizzle; - - src->RelAddr = relAddr; -} - - -/* - * Setup storage pointing to a scalar constant/literal. - */ -static void -constant_to_storage(slang_emit_info *emitInfo, - GLfloat val, - slang_ir_storage *store) -{ - GLuint swizzle; - GLint reg; - GLfloat value[4]; - - value[0] = val; - reg = _mesa_add_unnamed_constant(emitInfo->prog->Parameters, - value, 1, &swizzle); - - memset(store, 0, sizeof(*store)); - store->File = PROGRAM_CONSTANT; - store->Index = reg; - store->Swizzle = swizzle; -} - - -/** - * Add new instruction at end of given program. - * \param prog the program to append instruction onto - * \param opcode opcode for the new instruction - * \return pointer to the new instruction - */ -static struct prog_instruction * -new_instruction(slang_emit_info *emitInfo, gl_inst_opcode opcode) -{ - struct gl_program *prog = emitInfo->prog; - struct prog_instruction *inst; - -#if 0 - /* print prev inst */ - if (prog->NumInstructions > 0) { - _mesa_print_instruction(prog->Instructions + prog->NumInstructions - 1); - } -#endif - assert(prog->NumInstructions <= emitInfo->MaxInstructions); - - if (prog->NumInstructions == emitInfo->MaxInstructions) { - /* grow the instruction buffer */ - emitInfo->MaxInstructions += 20; - prog->Instructions = - _mesa_realloc_instructions(prog->Instructions, - prog->NumInstructions, - emitInfo->MaxInstructions); - if (!prog->Instructions) { - return NULL; - } - } - - inst = prog->Instructions + prog->NumInstructions; - prog->NumInstructions++; - _mesa_init_instructions(inst, 1); - inst->Opcode = opcode; - inst->BranchTarget = -1; /* invalid */ - /* - printf("New inst %d: %p %s\n", prog->NumInstructions-1,(void*)inst, - _mesa_opcode_string(inst->Opcode)); - */ - return inst; -} - - -static struct prog_instruction * -emit_arl_load(slang_emit_info *emitInfo, - gl_register_file file, GLint index, GLuint swizzle) -{ - struct prog_instruction *inst = new_instruction(emitInfo, OPCODE_ARL); - if (inst) { - inst->SrcReg[0].File = file; - inst->SrcReg[0].Index = index; - inst->SrcReg[0].Swizzle = fix_swizzle(swizzle); - inst->DstReg.File = PROGRAM_ADDRESS; - inst->DstReg.Index = 0; - inst->DstReg.WriteMask = WRITEMASK_X; - } - return inst; -} - - -/** - * Emit a new instruction with given opcode, operands. - * At this point the instruction may have multiple indirect register - * loads/stores. We convert those into ARL loads and address-relative - * operands. See comments inside. - * At some point in the future we could directly emit indirectly addressed - * registers in Mesa GPU instructions. - */ -static struct prog_instruction * -emit_instruction(slang_emit_info *emitInfo, - gl_inst_opcode opcode, - const slang_ir_storage *dst, - const slang_ir_storage *src0, - const slang_ir_storage *src1, - const slang_ir_storage *src2) -{ - struct prog_instruction *inst; - GLuint numIndirect = 0; - const slang_ir_storage *src[3]; - slang_ir_storage newSrc[3], newDst; - GLuint i; - GLboolean isTemp[3]; - - isTemp[0] = isTemp[1] = isTemp[2] = GL_FALSE; - - src[0] = src0; - src[1] = src1; - src[2] = src2; - - /* count up how many operands are indirect loads */ - for (i = 0; i < 3; i++) { - if (src[i] && src[i]->IsIndirect) - numIndirect++; - } - if (dst && dst->IsIndirect) - numIndirect++; - - /* Take special steps for indirect register loads. - * If we had multiple address registers this would be simpler. - * For example, this GLSL code: - * x[i] = y[j] + z[k]; - * would translate into something like: - * ARL ADDR.x, i; - * ARL ADDR.y, j; - * ARL ADDR.z, k; - * ADD TEMP[ADDR.x+5], TEMP[ADDR.y+9], TEMP[ADDR.z+4]; - * But since we currently only have one address register we have to do this: - * ARL ADDR.x, i; - * MOV t1, TEMP[ADDR.x+9]; - * ARL ADDR.x, j; - * MOV t2, TEMP[ADDR.x+4]; - * ARL ADDR.x, k; - * ADD TEMP[ADDR.x+5], t1, t2; - * The code here figures this out... - */ - if (numIndirect > 0) { - for (i = 0; i < 3; i++) { - if (src[i] && src[i]->IsIndirect) { - /* load the ARL register with the indirect register */ - emit_arl_load(emitInfo, - src[i]->IndirectFile, - src[i]->IndirectIndex, - src[i]->IndirectSwizzle); - - if (numIndirect > 1) { - /* Need to load src[i] into a temporary register */ - slang_ir_storage srcRelAddr; - alloc_local_temp(emitInfo, &newSrc[i], src[i]->Size); - isTemp[i] = GL_TRUE; - - /* set RelAddr flag on src register */ - srcRelAddr = *src[i]; - srcRelAddr.RelAddr = GL_TRUE; - srcRelAddr.IsIndirect = GL_FALSE; /* not really needed */ - - /* MOV newSrc, srcRelAddr; */ - inst = emit_instruction(emitInfo, - OPCODE_MOV, - &newSrc[i], - &srcRelAddr, - NULL, - NULL); - if (!inst) { - return NULL; - } - - src[i] = &newSrc[i]; - } - else { - /* just rewrite the src[i] storage to be ARL-relative */ - newSrc[i] = *src[i]; - newSrc[i].RelAddr = GL_TRUE; - newSrc[i].IsIndirect = GL_FALSE; /* not really needed */ - src[i] = &newSrc[i]; - } - } - } - } - - /* Take special steps for indirect dest register write */ - if (dst && dst->IsIndirect) { - /* load the ARL register with the indirect register */ - emit_arl_load(emitInfo, - dst->IndirectFile, - dst->IndirectIndex, - dst->IndirectSwizzle); - newDst = *dst; - newDst.RelAddr = GL_TRUE; - newDst.IsIndirect = GL_FALSE; - dst = &newDst; - } - - /* OK, emit the instruction and its dst, src regs */ - inst = new_instruction(emitInfo, opcode); - if (!inst) - return NULL; - - if (dst) - storage_to_dst_reg(&inst->DstReg, dst); - - for (i = 0; i < 3; i++) { - if (src[i]) - storage_to_src_reg(&inst->SrcReg[i], src[i]); - } - - /* Free any temp registers that we allocated above */ - for (i = 0; i < 3; i++) { - if (isTemp[i]) - _slang_free_temp(emitInfo->vt, &newSrc[i]); - } - - return inst; -} - - - -/** - * Put a comment on the given instruction. - */ -static void -inst_comment(struct prog_instruction *inst, const char *comment) -{ - if (inst) - inst->Comment = _mesa_strdup(comment); -} - - - -/** - * Return pointer to last instruction in program. - */ -static struct prog_instruction * -prev_instruction(slang_emit_info *emitInfo) -{ - struct gl_program *prog = emitInfo->prog; - if (prog->NumInstructions == 0) - return NULL; - else - return prog->Instructions + prog->NumInstructions - 1; -} - - -static struct prog_instruction * -emit(slang_emit_info *emitInfo, slang_ir_node *n); - - -/** - * Return an annotation string for given node's storage. - */ -static char * -storage_annotation(const slang_ir_node *n, const struct gl_program *prog) -{ -#if ANNOTATE - const slang_ir_storage *st = n->Store; - static char s[100] = ""; - - if (!st) - return _mesa_strdup(""); - - switch (st->File) { - case PROGRAM_CONSTANT: - if (st->Index >= 0) { - const GLfloat *val = prog->Parameters->ParameterValues[st->Index]; - if (st->Swizzle == SWIZZLE_NOOP) - _mesa_snprintf(s, sizeof(s), "{%g, %g, %g, %g}", val[0], val[1], val[2], val[3]); - else { - _mesa_snprintf(s, sizeof(s), "%g", val[GET_SWZ(st->Swizzle, 0)]); - } - } - break; - case PROGRAM_TEMPORARY: - if (n->Var) - _mesa_snprintf(s, sizeof(s), "%s", (char *) n->Var->a_name); - else - _mesa_snprintf(s, sizeof(s), "t[%d]", st->Index); - break; - case PROGRAM_STATE_VAR: - case PROGRAM_UNIFORM: - _mesa_snprintf(s, sizeof(s), "%s", prog->Parameters->Parameters[st->Index].Name); - break; - case PROGRAM_VARYING: - _mesa_snprintf(s, sizeof(s), "%s", prog->Varying->Parameters[st->Index].Name); - break; - case PROGRAM_INPUT: - _mesa_snprintf(s, sizeof(s), "input[%d]", st->Index); - break; - case PROGRAM_OUTPUT: - _mesa_snprintf(s, sizeof(s), "output[%d]", st->Index); - break; - default: - s[0] = 0; - } - return _mesa_strdup(s); -#else - return NULL; -#endif -} - - -/** - * Return an annotation string for an instruction. - */ -static char * -instruction_annotation(gl_inst_opcode opcode, char *dstAnnot, - char *srcAnnot0, char *srcAnnot1, char *srcAnnot2) -{ -#if ANNOTATE - const char *operator; - char *s; - int len = 50; - - if (dstAnnot) - len += strlen(dstAnnot); - else - dstAnnot = _mesa_strdup(""); - - if (srcAnnot0) - len += strlen(srcAnnot0); - else - srcAnnot0 = _mesa_strdup(""); - - if (srcAnnot1) - len += strlen(srcAnnot1); - else - srcAnnot1 = _mesa_strdup(""); - - if (srcAnnot2) - len += strlen(srcAnnot2); - else - srcAnnot2 = _mesa_strdup(""); - - switch (opcode) { - case OPCODE_ADD: - operator = "+"; - break; - case OPCODE_SUB: - operator = "-"; - break; - case OPCODE_MUL: - operator = "*"; - break; - case OPCODE_DP2: - operator = "DP2"; - break; - case OPCODE_DP3: - operator = "DP3"; - break; - case OPCODE_DP4: - operator = "DP4"; - break; - case OPCODE_XPD: - operator = "XPD"; - break; - case OPCODE_RSQ: - operator = "RSQ"; - break; - case OPCODE_SGT: - operator = ">"; - break; - default: - operator = ","; - } - - s = (char *) malloc(len); - _mesa_snprintf(s, len, "%s = %s %s %s %s", dstAnnot, - srcAnnot0, operator, srcAnnot1, srcAnnot2); - - free(dstAnnot); - free(srcAnnot0); - free(srcAnnot1); - free(srcAnnot2); - - return s; -#else - return NULL; -#endif -} - - -/** - * Emit an instruction that's just a comment. - */ -static struct prog_instruction * -emit_comment(slang_emit_info *emitInfo, const char *comment) -{ - struct prog_instruction *inst = new_instruction(emitInfo, OPCODE_NOP); - if (inst) { - inst_comment(inst, comment); - } - return inst; -} - - -/** - * Generate code for a simple arithmetic instruction. - * Either 1, 2 or 3 operands. - */ -static struct prog_instruction * -emit_arith(slang_emit_info *emitInfo, slang_ir_node *n) -{ - const slang_ir_info *info = _slang_ir_info(n->Opcode); - struct prog_instruction *inst; - GLuint i; - - assert(info); - assert(info->InstOpcode != OPCODE_NOP); - -#if PEEPHOLE_OPTIMIZATIONS - /* Look for MAD opportunity */ - if (info->NumParams == 2 && - n->Opcode == IR_ADD && n->Children[0]->Opcode == IR_MUL) { - /* found pattern IR_ADD(IR_MUL(A, B), C) */ - emit(emitInfo, n->Children[0]->Children[0]); /* A */ - emit(emitInfo, n->Children[0]->Children[1]); /* B */ - emit(emitInfo, n->Children[1]); /* C */ - if (!alloc_node_storage(emitInfo, n, -1)) { /* dest */ - return NULL; - } - - inst = emit_instruction(emitInfo, - OPCODE_MAD, - n->Store, - n->Children[0]->Children[0]->Store, - n->Children[0]->Children[1]->Store, - n->Children[1]->Store); - - free_node_storage(emitInfo->vt, n->Children[0]->Children[0]); - free_node_storage(emitInfo->vt, n->Children[0]->Children[1]); - free_node_storage(emitInfo->vt, n->Children[1]); - return inst; - } - - if (info->NumParams == 2 && - n->Opcode == IR_ADD && n->Children[1]->Opcode == IR_MUL) { - /* found pattern IR_ADD(A, IR_MUL(B, C)) */ - emit(emitInfo, n->Children[0]); /* A */ - emit(emitInfo, n->Children[1]->Children[0]); /* B */ - emit(emitInfo, n->Children[1]->Children[1]); /* C */ - if (!alloc_node_storage(emitInfo, n, -1)) { /* dest */ - return NULL; - } - - inst = emit_instruction(emitInfo, - OPCODE_MAD, - n->Store, - n->Children[1]->Children[0]->Store, - n->Children[1]->Children[1]->Store, - n->Children[0]->Store); - - free_node_storage(emitInfo->vt, n->Children[1]->Children[0]); - free_node_storage(emitInfo->vt, n->Children[1]->Children[1]); - free_node_storage(emitInfo->vt, n->Children[0]); - return inst; - } -#endif - - /* gen code for children, may involve temp allocation */ - for (i = 0; i < info->NumParams; i++) { - emit(emitInfo, n->Children[i]); - if (!n->Children[i] || !n->Children[i]->Store) { - /* error recovery */ - return NULL; - } - } - - /* result storage */ - if (!alloc_node_storage(emitInfo, n, -1)) { - return NULL; - } - - inst = emit_instruction(emitInfo, - info->InstOpcode, - n->Store, /* dest */ - (info->NumParams > 0 ? n->Children[0]->Store : NULL), - (info->NumParams > 1 ? n->Children[1]->Store : NULL), - (info->NumParams > 2 ? n->Children[2]->Store : NULL) - ); - - /* free temps */ - for (i = 0; i < info->NumParams; i++) - free_node_storage(emitInfo->vt, n->Children[i]); - - return inst; -} - - -/** - * Emit code for == and != operators. These could normally be handled - * by emit_arith() except we need to be able to handle structure comparisons. - */ -static struct prog_instruction * -emit_compare(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst = NULL; - GLint size; - - assert(n->Opcode == IR_EQUAL || n->Opcode == IR_NOTEQUAL); - - /* gen code for children */ - emit(emitInfo, n->Children[0]); - emit(emitInfo, n->Children[1]); - - if (n->Children[0]->Store->Size != n->Children[1]->Store->Size) { - /* XXX this error should have been caught in slang_codegen.c */ - slang_info_log_error(emitInfo->log, "invalid operands to == or !="); - n->Store = NULL; - return NULL; - } - - /* final result is 1 bool */ - if (!alloc_node_storage(emitInfo, n, 1)) - return NULL; - - size = n->Children[0]->Store->Size; - - if (size == 1) { - gl_inst_opcode opcode = n->Opcode == IR_EQUAL ? OPCODE_SEQ : OPCODE_SNE; - inst = emit_instruction(emitInfo, - opcode, - n->Store, /* dest */ - n->Children[0]->Store, - n->Children[1]->Store, - NULL); - } - else if (size <= 4) { - /* compare two vectors. - * Unfortunately, there's no instruction to compare vectors and - * return a scalar result. Do it with some compare and dot product - * instructions... - */ - GLuint swizzle; - gl_inst_opcode dotOp; - slang_ir_storage tempStore; - - if (!alloc_local_temp(emitInfo, &tempStore, 4)) { - n->Store = NULL; - return NULL; - /* out of temps */ - } - - if (size == 4) { - dotOp = OPCODE_DP4; - swizzle = SWIZZLE_XYZW; - } - else if (size == 3) { - dotOp = OPCODE_DP3; - swizzle = SWIZZLE_XYZW; - } - else { - assert(size == 2); - dotOp = OPCODE_DP3; /* XXX use OPCODE_DP2 eventually */ - swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y); - } - - /* Compute inequality (temp = (A != B)) */ - inst = emit_instruction(emitInfo, - OPCODE_SNE, - &tempStore, - n->Children[0]->Store, - n->Children[1]->Store, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "Compare values"); - - /* Compute val = DOT(temp, temp) (reduction) */ - inst = emit_instruction(emitInfo, - dotOp, - n->Store, - &tempStore, - &tempStore, - NULL); - if (!inst) { - return NULL; - } - inst->SrcReg[0].Swizzle = inst->SrcReg[1].Swizzle = swizzle; /*override*/ - inst_comment(inst, "Reduce vec to bool"); - - _slang_free_temp(emitInfo->vt, &tempStore); /* free temp */ - - if (n->Opcode == IR_EQUAL) { - /* compute val = !val.x with SEQ val, val, 0; */ - slang_ir_storage zero; - constant_to_storage(emitInfo, 0.0, &zero); - inst = emit_instruction(emitInfo, - OPCODE_SEQ, - n->Store, /* dest */ - n->Store, - &zero, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "Invert true/false"); - } - } - else { - /* size > 4, struct or array compare. - * XXX this won't work reliably for structs with padding!! - */ - GLint i, num = (n->Children[0]->Store->Size + 3) / 4; - slang_ir_storage accTemp, sneTemp; - - if (!alloc_local_temp(emitInfo, &accTemp, 4)) - return NULL; - - if (!alloc_local_temp(emitInfo, &sneTemp, 4)) - return NULL; - - for (i = 0; i < num; i++) { - slang_ir_storage srcStore0 = *n->Children[0]->Store; - slang_ir_storage srcStore1 = *n->Children[1]->Store; - srcStore0.Index += i; - srcStore1.Index += i; - - if (i == 0) { - /* SNE accTemp, left[i], right[i] */ - inst = emit_instruction(emitInfo, OPCODE_SNE, - &accTemp, /* dest */ - &srcStore0, - &srcStore1, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "Begin struct/array comparison"); - } - else { - /* SNE sneTemp, left[i], right[i] */ - inst = emit_instruction(emitInfo, OPCODE_SNE, - &sneTemp, /* dest */ - &srcStore0, - &srcStore1, - NULL); - if (!inst) { - return NULL; - } - /* ADD accTemp, accTemp, sneTemp; # like logical-OR */ - inst = emit_instruction(emitInfo, OPCODE_ADD, - &accTemp, /* dest */ - &accTemp, - &sneTemp, - NULL); - if (!inst) { - return NULL; - } - } - } - - /* compute accTemp.x || accTemp.y || accTemp.z || accTemp.w with DOT4 */ - inst = emit_instruction(emitInfo, OPCODE_DP4, - n->Store, - &accTemp, - &accTemp, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "End struct/array comparison"); - - if (n->Opcode == IR_EQUAL) { - /* compute tmp.x = !tmp.x via tmp.x = (tmp.x == 0) */ - slang_ir_storage zero; - constant_to_storage(emitInfo, 0.0, &zero); - inst = emit_instruction(emitInfo, OPCODE_SEQ, - n->Store, /* dest */ - n->Store, - &zero, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "Invert true/false"); - } - - _slang_free_temp(emitInfo->vt, &accTemp); - _slang_free_temp(emitInfo->vt, &sneTemp); - } - - /* free temps */ - free_node_storage(emitInfo->vt, n->Children[0]); - free_node_storage(emitInfo->vt, n->Children[1]); - - return inst; -} - - - -/** - * Generate code for an IR_CLAMP instruction. - */ -static struct prog_instruction * -emit_clamp(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - slang_ir_node tmpNode; - - assert(n->Opcode == IR_CLAMP); - /* ch[0] = value - * ch[1] = min limit - * ch[2] = max limit - */ - - inst = emit(emitInfo, n->Children[0]); - - /* If lower limit == 0.0 and upper limit == 1.0, - * set prev instruction's SaturateMode field to SATURATE_ZERO_ONE. - * Else, - * emit OPCODE_MIN, OPCODE_MAX sequence. - */ -#if 0 - /* XXX this isn't quite finished yet */ - if (n->Children[1]->Opcode == IR_FLOAT && - n->Children[1]->Value[0] == 0.0 && - n->Children[1]->Value[1] == 0.0 && - n->Children[1]->Value[2] == 0.0 && - n->Children[1]->Value[3] == 0.0 && - n->Children[2]->Opcode == IR_FLOAT && - n->Children[2]->Value[0] == 1.0 && - n->Children[2]->Value[1] == 1.0 && - n->Children[2]->Value[2] == 1.0 && - n->Children[2]->Value[3] == 1.0) { - if (!inst) { - inst = prev_instruction(prog); - } - if (inst && inst->Opcode != OPCODE_NOP) { - /* and prev instruction's DstReg matches n->Children[0]->Store */ - inst->SaturateMode = SATURATE_ZERO_ONE; - n->Store = n->Children[0]->Store; - return inst; - } - } -#else - (void) inst; -#endif - - if (!alloc_node_storage(emitInfo, n, n->Children[0]->Store->Size)) - return NULL; - - emit(emitInfo, n->Children[1]); - emit(emitInfo, n->Children[2]); - - /* Some GPUs don't allow reading from output registers. So if the - * dest for this clamp() is an output reg, we can't use that reg for - * the intermediate result. Use a temp register instead. - */ - memset(&tmpNode, 0, sizeof(tmpNode)); - if (!alloc_node_storage(emitInfo, &tmpNode, n->Store->Size)) { - return NULL; - } - - /* tmp = max(ch[0], ch[1]) */ - inst = emit_instruction(emitInfo, OPCODE_MAX, - tmpNode.Store, /* dest */ - n->Children[0]->Store, - n->Children[1]->Store, - NULL); - if (!inst) { - return NULL; - } - - /* n->dest = min(tmp, ch[2]) */ - inst = emit_instruction(emitInfo, OPCODE_MIN, - n->Store, /* dest */ - tmpNode.Store, - n->Children[2]->Store, - NULL); - - free_node_storage(emitInfo->vt, &tmpNode); - - return inst; -} - - -static struct prog_instruction * -emit_negation(slang_emit_info *emitInfo, slang_ir_node *n) -{ - /* Implement as MOV dst, -src; */ - /* XXX we could look at the previous instruction and in some circumstances - * modify it to accomplish the negation. - */ - struct prog_instruction *inst; - - emit(emitInfo, n->Children[0]); - - if (!alloc_node_storage(emitInfo, n, n->Children[0]->Store->Size)) - return NULL; - - inst = emit_instruction(emitInfo, - OPCODE_MOV, - n->Store, /* dest */ - n->Children[0]->Store, - NULL, - NULL); - if (inst) { - inst->SrcReg[0].Negate = NEGATE_XYZW; - } - return inst; -} - - -static struct prog_instruction * -emit_label(slang_emit_info *emitInfo, const slang_ir_node *n) -{ - assert(n->Label); -#if 0 - /* XXX this fails in loop tail code - investigate someday */ - assert(_slang_label_get_location(n->Label) < 0); - _slang_label_set_location(n->Label, emitInfo->prog->NumInstructions, - emitInfo->prog); -#else - if (_slang_label_get_location(n->Label) < 0) - _slang_label_set_location(n->Label, emitInfo->prog->NumInstructions, - emitInfo->prog); -#endif - return NULL; -} - - -/** - * Emit code for a function call. - * Note that for each time a function is called, we emit the function's - * body code again because the set of available registers may be different. - */ -static struct prog_instruction * -emit_fcall(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct gl_program *progSave; - struct prog_instruction *inst; - GLuint subroutineId; - GLuint maxInstSave; - - assert(n->Opcode == IR_CALL); - assert(n->Label); - - /* save/push cur program */ - maxInstSave = emitInfo->MaxInstructions; - progSave = emitInfo->prog; - - emitInfo->prog = new_subroutine(emitInfo, &subroutineId); - emitInfo->MaxInstructions = emitInfo->prog->NumInstructions; - - _slang_label_set_location(n->Label, emitInfo->prog->NumInstructions, - emitInfo->prog); - - if (emitInfo->EmitBeginEndSub) { - /* BGNSUB isn't a real instruction. - * We require a label (i.e. "foobar:") though, if we're going to - * print the program in the NV format. The BNGSUB instruction is - * really just a NOP to attach the label to. - */ - inst = new_instruction(emitInfo, OPCODE_BGNSUB); - if (!inst) { - return NULL; - } - inst_comment(inst, n->Label->Name); - } - - /* body of function: */ - emit(emitInfo, n->Children[0]); - n->Store = n->Children[0]->Store; - - /* add RET instruction now, if needed */ - inst = prev_instruction(emitInfo); - if (inst && inst->Opcode != OPCODE_RET) { - inst = new_instruction(emitInfo, OPCODE_RET); - if (!inst) { - return NULL; - } - } - - if (emitInfo->EmitBeginEndSub) { - inst = new_instruction(emitInfo, OPCODE_ENDSUB); - if (!inst) { - return NULL; - } - inst_comment(inst, n->Label->Name); - } - - /* pop/restore cur program */ - emitInfo->prog = progSave; - emitInfo->MaxInstructions = maxInstSave; - - /* emit the function call */ - inst = new_instruction(emitInfo, OPCODE_CAL); - if (!inst) { - return NULL; - } - /* The branch target is just the subroutine number (changed later) */ - inst->BranchTarget = subroutineId; - inst_comment(inst, n->Label->Name); - assert(inst->BranchTarget >= 0); - - return inst; -} - - -/** - * Emit code for a 'return' statement. - */ -static struct prog_instruction * -emit_return(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - assert(n); - assert(n->Opcode == IR_RETURN); - assert(n->Label); - inst = new_instruction(emitInfo, OPCODE_RET); - if (inst) { - inst->DstReg.CondMask = COND_TR; /* always return */ - } - return inst; -} - - -static struct prog_instruction * -emit_kill(slang_emit_info *emitInfo) -{ - struct gl_fragment_program *fp; - struct prog_instruction *inst; - /* NV-KILL - discard fragment depending on condition code. - * Note that ARB-KILL depends on sign of vector operand. - */ - inst = new_instruction(emitInfo, OPCODE_KIL_NV); - if (!inst) { - return NULL; - } - inst->DstReg.CondMask = COND_TR; /* always kill */ - - assert(emitInfo->prog->Target == GL_FRAGMENT_PROGRAM_ARB); - fp = (struct gl_fragment_program *) emitInfo->prog; - fp->UsesKill = GL_TRUE; - - return inst; -} - - -static struct prog_instruction * -emit_tex(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - gl_inst_opcode opcode; - GLboolean shadow = GL_FALSE; - - switch (n->Opcode) { - case IR_TEX: - opcode = OPCODE_TEX; - break; - case IR_TEX_SH: - opcode = OPCODE_TEX; - shadow = GL_TRUE; - break; - case IR_TEXB: - opcode = OPCODE_TXB; - break; - case IR_TEXB_SH: - opcode = OPCODE_TXB; - shadow = GL_TRUE; - break; - case IR_TEXP: - opcode = OPCODE_TXP; - break; - case IR_TEXP_SH: - opcode = OPCODE_TXP; - shadow = GL_TRUE; - break; - default: - _mesa_problem(NULL, "Bad IR TEX code"); - return NULL; - } - - if (n->Children[0]->Opcode == IR_ELEMENT) { - /* array is the sampler (a uniform which'll indicate the texture unit) */ - assert(n->Children[0]->Children[0]->Store); - assert(n->Children[0]->Children[0]->Store->File == PROGRAM_SAMPLER); - - emit(emitInfo, n->Children[0]); - - n->Children[0]->Var = n->Children[0]->Children[0]->Var; - } else { - /* this is the sampler (a uniform which'll indicate the texture unit) */ - assert(n->Children[0]->Store); - assert(n->Children[0]->Store->File == PROGRAM_SAMPLER); - } - - /* emit code for the texcoord operand */ - (void) emit(emitInfo, n->Children[1]); - - /* alloc storage for result of texture fetch */ - if (!alloc_node_storage(emitInfo, n, 4)) - return NULL; - - /* emit TEX instruction; Child[1] is the texcoord */ - inst = emit_instruction(emitInfo, - opcode, - n->Store, - n->Children[1]->Store, - NULL, - NULL); - if (!inst) { - return NULL; - } - - inst->TexShadow = shadow; - - /* Store->Index is the uniform/sampler index */ - assert(n->Children[0]->Store->Index >= 0); - inst->TexSrcUnit = n->Children[0]->Store->Index; - inst->TexSrcTarget = n->Children[0]->Store->TexTarget; - - /* mark the sampler as being used */ - _mesa_use_uniform(emitInfo->prog->Parameters, - (char *) n->Children[0]->Var->a_name); - - return inst; -} - - -/** - * Assignment/copy - */ -static struct prog_instruction * -emit_copy(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - - assert(n->Opcode == IR_COPY); - - /* lhs */ - emit(emitInfo, n->Children[0]); - if (!n->Children[0]->Store || n->Children[0]->Store->Index < 0) { - /* an error should have been already recorded */ - return NULL; - } - - /* rhs */ - assert(n->Children[1]); - inst = emit(emitInfo, n->Children[1]); - - if (!n->Children[1]->Store || n->Children[1]->Store->Index < 0) { - if (!emitInfo->log->text && !emitInfo->UnresolvedFunctions) { - /* XXX this error should have been caught in slang_codegen.c */ - slang_info_log_error(emitInfo->log, "invalid assignment"); - } - return NULL; - } - - assert(n->Children[1]->Store->Index >= 0); - - /*assert(n->Children[0]->Store->Size == n->Children[1]->Store->Size);*/ - - n->Store = n->Children[0]->Store; - - if (n->Store->File == PROGRAM_SAMPLER) { - /* no code generated for sampler assignments, - * just copy the sampler index/target at compile time. - */ - n->Store->Index = n->Children[1]->Store->Index; - n->Store->TexTarget = n->Children[1]->Store->TexTarget; - return NULL; - } - -#if PEEPHOLE_OPTIMIZATIONS - if (inst && - (n->Children[1]->Opcode != IR_SWIZZLE) && - _slang_is_temp(emitInfo->vt, n->Children[1]->Store) && - (inst->DstReg.File == n->Children[1]->Store->File) && - (inst->DstReg.Index == n->Children[1]->Store->Index) && - !n->Children[0]->Store->IsIndirect && - n->Children[0]->Store->Size <= 4) { - /* Peephole optimization: - * The Right-Hand-Side has its results in a temporary place. - * Modify the RHS (and the prev instruction) to store its results - * in the destination specified by n->Children[0]. - * Then, this MOVE is a no-op. - * Ex: - * MUL tmp, x, y; - * MOV a, tmp; - * becomes: - * MUL a, x, y; - */ - - /* fixup the previous instruction (which stored the RHS result) */ - assert(n->Children[0]->Store->Index >= 0); - storage_to_dst_reg(&inst->DstReg, n->Children[0]->Store); - return inst; - } - else -#endif - { - if (n->Children[0]->Store->Size > 4) { - /* move matrix/struct etc (block of registers) */ - slang_ir_storage dstStore = *n->Children[0]->Store; - slang_ir_storage srcStore = *n->Children[1]->Store; - GLint size = srcStore.Size; - ASSERT(n->Children[1]->Store->Swizzle == SWIZZLE_NOOP); - dstStore.Size = 4; - srcStore.Size = 4; - while (size >= 4) { - inst = emit_instruction(emitInfo, OPCODE_MOV, - &dstStore, - &srcStore, - NULL, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "IR_COPY block"); - srcStore.Index++; - dstStore.Index++; - size -= 4; - } - } - else { - /* single register move */ - char *srcAnnot, *dstAnnot; - assert(n->Children[0]->Store->Index >= 0); - inst = emit_instruction(emitInfo, OPCODE_MOV, - n->Children[0]->Store, /* dest */ - n->Children[1]->Store, - NULL, - NULL); - if (!inst) { - return NULL; - } - dstAnnot = storage_annotation(n->Children[0], emitInfo->prog); - srcAnnot = storage_annotation(n->Children[1], emitInfo->prog); - inst->Comment = instruction_annotation(inst->Opcode, dstAnnot, - srcAnnot, NULL, NULL); - } - free_node_storage(emitInfo->vt, n->Children[1]); - return inst; - } -} - - -/** - * An IR_COND node wraps a boolean expression which is used by an - * IF or WHILE test. This is where we'll set condition codes, if needed. - */ -static struct prog_instruction * -emit_cond(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - - assert(n->Opcode == IR_COND); - - if (!n->Children[0]) - return NULL; - - /* emit code for the expression */ - inst = emit(emitInfo, n->Children[0]); - - if (!n->Children[0]->Store) { - /* error recovery */ - return NULL; - } - - assert(n->Children[0]->Store); - /*assert(n->Children[0]->Store->Size == 1);*/ - - if (emitInfo->EmitCondCodes) { - if (inst && - n->Children[0]->Store && - inst->DstReg.File == n->Children[0]->Store->File && - inst->DstReg.Index == n->Children[0]->Store->Index) { - /* The previous instruction wrote to the register who's value - * we're testing. Just fix that instruction so that the - * condition codes are computed. - */ - inst->CondUpdate = GL_TRUE; - n->Store = n->Children[0]->Store; - return inst; - } - else { - /* This'll happen for things like "if (i) ..." where no code - * is normally generated for the expression "i". - * Generate a move instruction just to set condition codes. - */ - if (!alloc_node_storage(emitInfo, n, 1)) - return NULL; - inst = emit_instruction(emitInfo, OPCODE_MOV, - n->Store, /* dest */ - n->Children[0]->Store, - NULL, - NULL); - if (!inst) { - return NULL; - } - inst->CondUpdate = GL_TRUE; - inst_comment(inst, "COND expr"); - _slang_free_temp(emitInfo->vt, n->Store); - return inst; - } - } - else { - /* No-op: the boolean result of the expression is in a regular reg */ - n->Store = n->Children[0]->Store; - return inst; - } -} - - -/** - * Logical-NOT - */ -static struct prog_instruction * -emit_not(slang_emit_info *emitInfo, slang_ir_node *n) -{ - static const struct { - gl_inst_opcode op, opNot; - } operators[] = { - { OPCODE_SLT, OPCODE_SGE }, - { OPCODE_SLE, OPCODE_SGT }, - { OPCODE_SGT, OPCODE_SLE }, - { OPCODE_SGE, OPCODE_SLT }, - { OPCODE_SEQ, OPCODE_SNE }, - { OPCODE_SNE, OPCODE_SEQ }, - { 0, 0 } - }; - struct prog_instruction *inst; - slang_ir_storage zero; - GLuint i; - - /* child expr */ - inst = emit(emitInfo, n->Children[0]); - -#if PEEPHOLE_OPTIMIZATIONS - if (inst) { - /* if the prev instruction was a comparison instruction, invert it */ - for (i = 0; operators[i].op; i++) { - if (inst->Opcode == operators[i].op) { - inst->Opcode = operators[i].opNot; - n->Store = n->Children[0]->Store; - return inst; - } - } - } -#endif - - /* else, invert using SEQ (v = v == 0) */ - if (!alloc_node_storage(emitInfo, n, n->Children[0]->Store->Size)) - return NULL; - - constant_to_storage(emitInfo, 0.0, &zero); - inst = emit_instruction(emitInfo, - OPCODE_SEQ, - n->Store, - n->Children[0]->Store, - &zero, - NULL); - if (!inst) { - return NULL; - } - inst_comment(inst, "NOT"); - - free_node_storage(emitInfo->vt, n->Children[0]); - - return inst; -} - - -static struct prog_instruction * -emit_if(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct gl_program *prog = emitInfo->prog; - GLuint ifInstLoc, elseInstLoc = 0; - GLuint condWritemask = 0; - - /* emit condition expression code */ - { - struct prog_instruction *inst; - inst = emit(emitInfo, n->Children[0]); - if (emitInfo->EmitCondCodes) { - if (!inst) { - /* error recovery */ - return NULL; - } - condWritemask = inst->DstReg.WriteMask; - } - } - - if (!n->Children[0]->Store) - return NULL; - -#if 0 - assert(n->Children[0]->Store->Size == 1); /* a bool! */ -#endif - - ifInstLoc = prog->NumInstructions; - if (emitInfo->EmitHighLevelInstructions) { - if (emitInfo->EmitCondCodes) { - /* IF condcode THEN ... */ - struct prog_instruction *ifInst = new_instruction(emitInfo, OPCODE_IF); - if (!ifInst) { - return NULL; - } - ifInst->DstReg.CondMask = COND_NE; /* if cond is non-zero */ - /* only test the cond code (1 of 4) that was updated by the - * previous instruction. - */ - ifInst->DstReg.CondSwizzle = writemask_to_swizzle(condWritemask); - } - else { - struct prog_instruction *inst; - - /* IF src[0] THEN ... */ - inst = emit_instruction(emitInfo, OPCODE_IF, - NULL, /* dst */ - n->Children[0]->Store, /* op0 */ - NULL, - NULL); - if (!inst) { - return NULL; - } - } - } - else { - /* conditional jump to else, or endif */ - struct prog_instruction *ifInst = new_instruction(emitInfo, OPCODE_BRA); - if (!ifInst) { - return NULL; - } - ifInst->DstReg.CondMask = COND_EQ; /* BRA if cond is zero */ - inst_comment(ifInst, "if zero"); - ifInst->DstReg.CondSwizzle = writemask_to_swizzle(condWritemask); - } - - /* if body */ - emit(emitInfo, n->Children[1]); - - if (n->Children[2]) { - /* have else body */ - elseInstLoc = prog->NumInstructions; - if (emitInfo->EmitHighLevelInstructions) { - struct prog_instruction *inst = new_instruction(emitInfo, OPCODE_ELSE); - if (!inst) { - return NULL; - } - prog->Instructions[ifInstLoc].BranchTarget = prog->NumInstructions - 1; - } - else { - /* jump to endif instruction */ - struct prog_instruction *inst = new_instruction(emitInfo, OPCODE_BRA); - if (!inst) { - return NULL; - } - inst_comment(inst, "else"); - inst->DstReg.CondMask = COND_TR; /* always branch */ - prog->Instructions[ifInstLoc].BranchTarget = prog->NumInstructions; - } - emit(emitInfo, n->Children[2]); - } - else { - /* no else body */ - prog->Instructions[ifInstLoc].BranchTarget = prog->NumInstructions; - } - - if (emitInfo->EmitHighLevelInstructions) { - struct prog_instruction *inst = new_instruction(emitInfo, OPCODE_ENDIF); - if (!inst) { - return NULL; - } - } - - if (elseInstLoc) { - /* point ELSE instruction BranchTarget at ENDIF */ - if (emitInfo->EmitHighLevelInstructions) { - prog->Instructions[elseInstLoc].BranchTarget = prog->NumInstructions - 1; - } - else { - prog->Instructions[elseInstLoc].BranchTarget = prog->NumInstructions; - } - } - return NULL; -} - - -static struct prog_instruction * -emit_loop(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct gl_program *prog = emitInfo->prog; - struct prog_instruction *endInst; - GLuint beginInstLoc, tailInstLoc, endInstLoc; - slang_ir_node *ir; - - /* emit OPCODE_BGNLOOP */ - beginInstLoc = prog->NumInstructions; - if (emitInfo->EmitHighLevelInstructions) { - struct prog_instruction *inst = new_instruction(emitInfo, OPCODE_BGNLOOP); - if (!inst) { - return NULL; - } - } - - /* body */ - emit(emitInfo, n->Children[0]); - - /* tail */ - tailInstLoc = prog->NumInstructions; - if (n->Children[1]) { - if (emitInfo->EmitComments) - emit_comment(emitInfo, "Loop tail code:"); - emit(emitInfo, n->Children[1]); - } - - endInstLoc = prog->NumInstructions; - if (emitInfo->EmitHighLevelInstructions) { - /* emit OPCODE_ENDLOOP */ - endInst = new_instruction(emitInfo, OPCODE_ENDLOOP); - if (!endInst) { - return NULL; - } - } - else { - /* emit unconditional BRA-nch */ - endInst = new_instruction(emitInfo, OPCODE_BRA); - if (!endInst) { - return NULL; - } - endInst->DstReg.CondMask = COND_TR; /* always true */ - } - /* ENDLOOP's BranchTarget points to the BGNLOOP inst */ - endInst->BranchTarget = beginInstLoc; - - if (emitInfo->EmitHighLevelInstructions) { - /* BGNLOOP's BranchTarget points to the ENDLOOP inst */ - prog->Instructions[beginInstLoc].BranchTarget = prog->NumInstructions -1; - } - - /* Done emitting loop code. Now walk over the loop's linked list of - * BREAK and CONT nodes, filling in their BranchTarget fields (which - * will point to the corresponding ENDLOOP instruction. - */ - for (ir = n->List; ir; ir = ir->List) { - struct prog_instruction *inst = prog->Instructions + ir->InstLocation; - assert(inst->BranchTarget < 0); - if (ir->Opcode == IR_BREAK || - ir->Opcode == IR_BREAK_IF_TRUE) { - assert(inst->Opcode == OPCODE_BRK || - inst->Opcode == OPCODE_BRA); - /* go to instruction at end of loop */ - if (emitInfo->EmitHighLevelInstructions) { - inst->BranchTarget = endInstLoc; - } - else { - inst->BranchTarget = endInstLoc + 1; - } - } - else { - assert(ir->Opcode == IR_CONT || - ir->Opcode == IR_CONT_IF_TRUE); - assert(inst->Opcode == OPCODE_CONT || - inst->Opcode == OPCODE_BRA); - /* go to instruction at tail of loop */ - inst->BranchTarget = endInstLoc; - } - } - return NULL; -} - - -/** - * Unconditional "continue" or "break" statement. - * Either OPCODE_CONT, OPCODE_BRK or OPCODE_BRA will be emitted. - */ -static struct prog_instruction * -emit_cont_break(slang_emit_info *emitInfo, slang_ir_node *n) -{ - gl_inst_opcode opcode; - struct prog_instruction *inst; - - if (n->Opcode == IR_CONT) { - /* we need to execute the loop's tail code before doing CONT */ - assert(n->Parent); - assert(n->Parent->Opcode == IR_LOOP); - if (n->Parent->Children[1]) { - /* emit tail code */ - if (emitInfo->EmitComments) { - emit_comment(emitInfo, "continue - tail code:"); - } - emit(emitInfo, n->Parent->Children[1]); - } - } - - /* opcode selection */ - if (emitInfo->EmitHighLevelInstructions) { - opcode = (n->Opcode == IR_CONT) ? OPCODE_CONT : OPCODE_BRK; - } - else { - opcode = OPCODE_BRA; - } - n->InstLocation = emitInfo->prog->NumInstructions; - inst = new_instruction(emitInfo, opcode); - if (inst) { - inst->DstReg.CondMask = COND_TR; /* always true */ - } - return inst; -} - - -/** - * Conditional "continue" or "break" statement. - * Either OPCODE_CONT, OPCODE_BRK or OPCODE_BRA will be emitted. - */ -static struct prog_instruction * -emit_cont_break_if_true(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - - assert(n->Opcode == IR_CONT_IF_TRUE || - n->Opcode == IR_BREAK_IF_TRUE); - - /* evaluate condition expr, setting cond codes */ - inst = emit(emitInfo, n->Children[0]); - if (emitInfo->EmitCondCodes) { - assert(inst); - inst->CondUpdate = GL_TRUE; - } - - n->InstLocation = emitInfo->prog->NumInstructions; - - /* opcode selection */ - if (emitInfo->EmitHighLevelInstructions) { - const gl_inst_opcode opcode - = (n->Opcode == IR_CONT_IF_TRUE) ? OPCODE_CONT : OPCODE_BRK; - if (emitInfo->EmitCondCodes) { - /* Get the writemask from the previous instruction which set - * the condcodes. Use that writemask as the CondSwizzle. - */ - const GLuint condWritemask = inst->DstReg.WriteMask; - inst = new_instruction(emitInfo, opcode); - if (inst) { - inst->DstReg.CondMask = COND_NE; - inst->DstReg.CondSwizzle = writemask_to_swizzle(condWritemask); - } - return inst; - } - else { - /* IF reg - * BRK/CONT; - * ENDIF - */ - GLint ifInstLoc; - ifInstLoc = emitInfo->prog->NumInstructions; - inst = emit_instruction(emitInfo, OPCODE_IF, - NULL, /* dest */ - n->Children[0]->Store, - NULL, - NULL); - if (!inst) { - return NULL; - } - n->InstLocation = emitInfo->prog->NumInstructions; - - inst = new_instruction(emitInfo, opcode); - if (!inst) { - return NULL; - } - inst = new_instruction(emitInfo, OPCODE_ENDIF); - if (!inst) { - return NULL; - } - - emitInfo->prog->Instructions[ifInstLoc].BranchTarget - = emitInfo->prog->NumInstructions - 1; - return inst; - } - } - else { - const GLuint condWritemask = inst->DstReg.WriteMask; - assert(emitInfo->EmitCondCodes); - inst = new_instruction(emitInfo, OPCODE_BRA); - if (inst) { - inst->DstReg.CondMask = COND_NE; - inst->DstReg.CondSwizzle = writemask_to_swizzle(condWritemask); - } - return inst; - } -} - - -/** - * Return the size of a swizzle mask given that some swizzle components - * may be NIL/undefined. For example: - * swizzle_size(".zzxx") = 4 - * swizzle_size(".xy??") = 2 - * swizzle_size(".w???") = 1 - */ -static GLuint -swizzle_size(GLuint swizzle) -{ - GLuint i; - for (i = 0; i < 4; i++) { - if (GET_SWZ(swizzle, i) == SWIZZLE_NIL) - return i; - } - return 4; -} - - -static struct prog_instruction * -emit_swizzle(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - - inst = emit(emitInfo, n->Children[0]); - - if (!n->Store->Parent) { - /* this covers a case such as "(b ? p : q).x" */ - n->Store->Parent = n->Children[0]->Store; - assert(n->Store->Parent); - } - - { - const GLuint swizzle = n->Store->Swizzle; - /* new storage is parent storage with updated Swizzle + Size fields */ - _slang_copy_ir_storage(n->Store, n->Store->Parent); - /* Apply this node's swizzle to parent's storage */ - n->Store->Swizzle = _slang_swizzle_swizzle(n->Store->Swizzle, swizzle); - /* Update size */ - n->Store->Size = swizzle_size(n->Store->Swizzle); - } - - assert(!n->Store->Parent); - assert(n->Store->Index >= 0); - - return inst; -} - - -/** - * Dereference array element: element == array[index] - * This basically involves emitting code for computing the array index - * and updating the node/element's storage info. - */ -static struct prog_instruction * -emit_array_element(slang_emit_info *emitInfo, slang_ir_node *n) -{ - slang_ir_storage *arrayStore, *indexStore; - const int elemSize = n->Store->Size; /* number of floats */ - const GLint elemSizeVec = (elemSize + 3) / 4; /* number of vec4 */ - struct prog_instruction *inst; - - assert(n->Opcode == IR_ELEMENT); - assert(elemSize > 0); - - /* special case for built-in state variables, like light state */ - { - slang_ir_storage *root = n->Store; - assert(!root->Parent); - while (root->Parent) - root = root->Parent; - - if (root->File == PROGRAM_STATE_VAR) { - GLboolean direct; - GLint index = - _slang_alloc_statevar(n, emitInfo->prog->Parameters, &direct); - if (index < 0) { - /* error */ - return NULL; - } - if (direct) { - n->Store->Index = index; - return NULL; /* all done */ - } - } - } - - /* do codegen for array itself */ - emit(emitInfo, n->Children[0]); - arrayStore = n->Children[0]->Store; - - /* The initial array element storage is the array's storage, - * then modified below. - */ - _slang_copy_ir_storage(n->Store, arrayStore); - - - if (n->Children[1]->Opcode == IR_FLOAT) { - /* Constant array index */ - const GLint element = (GLint) n->Children[1]->Value[0]; - - /* this element's storage is the array's storage, plus constant offset */ - n->Store->Index += elemSizeVec * element; - } - else { - /* Variable array index */ - - /* do codegen for array index expression */ - emit(emitInfo, n->Children[1]); - indexStore = n->Children[1]->Store; - - if (indexStore->IsIndirect) { - /* need to put the array index into a temporary since we can't - * directly support a[b[i]] constructs. - */ - - - /*indexStore = tempstore();*/ - } - - - if (elemSize > 4) { - /* need to multiply array index by array element size */ - struct prog_instruction *inst; - slang_ir_storage *indexTemp; - slang_ir_storage elemSizeStore; - - /* allocate 1 float indexTemp */ - indexTemp = _slang_new_ir_storage(PROGRAM_TEMPORARY, -1, 1); - _slang_alloc_temp(emitInfo->vt, indexTemp); - - /* allocate a constant containing the element size */ - constant_to_storage(emitInfo, (float) elemSizeVec, &elemSizeStore); - - /* multiply array index by element size */ - inst = emit_instruction(emitInfo, - OPCODE_MUL, - indexTemp, /* dest */ - indexStore, /* the index */ - &elemSizeStore, - NULL); - if (!inst) { - return NULL; - } - - indexStore = indexTemp; - } - - if (arrayStore->IsIndirect) { - /* ex: in a[i][j], a[i] (the arrayStore) is indirect */ - /* Need to add indexStore to arrayStore->Indirect store */ - slang_ir_storage indirectArray; - slang_ir_storage *indexTemp; - - _slang_init_ir_storage(&indirectArray, - arrayStore->IndirectFile, - arrayStore->IndirectIndex, - 1, - arrayStore->IndirectSwizzle); - - /* allocate 1 float indexTemp */ - indexTemp = _slang_new_ir_storage(PROGRAM_TEMPORARY, -1, 1); - _slang_alloc_temp(emitInfo->vt, indexTemp); - - inst = emit_instruction(emitInfo, - OPCODE_ADD, - indexTemp, /* dest */ - indexStore, /* the index */ - &indirectArray, /* indirect array base */ - NULL); - if (!inst) { - return NULL; - } - - indexStore = indexTemp; - } - - /* update the array element storage info */ - n->Store->IsIndirect = GL_TRUE; - n->Store->IndirectFile = indexStore->File; - n->Store->IndirectIndex = indexStore->Index; - n->Store->IndirectSwizzle = indexStore->Swizzle; - } - - n->Store->Size = elemSize; - n->Store->Swizzle = _slang_var_swizzle(elemSize, 0); - - return NULL; /* no instruction */ -} - - -/** - * Resolve storage for accessing a structure field. - */ -static struct prog_instruction * -emit_struct_field(slang_emit_info *emitInfo, slang_ir_node *n) -{ - slang_ir_storage *root = n->Store; - GLint fieldOffset, fieldSize; - - assert(n->Opcode == IR_FIELD); - - assert(!root->Parent); - while (root->Parent) - root = root->Parent; - - /* If this is the field of a state var, allocate constant/uniform - * storage for it now if we haven't already. - * Note that we allocate storage (uniform/constant slots) for state - * variables here rather than at declaration time so we only allocate - * space for the ones that we actually use! - */ - if (root->File == PROGRAM_STATE_VAR) { - GLboolean direct; - GLint index = _slang_alloc_statevar(n, emitInfo->prog->Parameters, &direct); - if (index < 0) { - slang_info_log_error(emitInfo->log, "Error parsing state variable"); - return NULL; - } - if (direct) { - root->Index = index; - return NULL; /* all done */ - } - } - - /* do codegen for struct */ - emit(emitInfo, n->Children[0]); - assert(n->Children[0]->Store->Index >= 0); - - - fieldOffset = n->Store->Index; - fieldSize = n->Store->Size; - - _slang_copy_ir_storage(n->Store, n->Children[0]->Store); - - n->Store->Index = n->Children[0]->Store->Index + fieldOffset / 4; - n->Store->Size = fieldSize; - - switch (fieldSize) { - case 1: - { - GLint swz = fieldOffset % 4; - n->Store->Swizzle = MAKE_SWIZZLE4(swz, swz, swz, swz); - } - break; - case 2: - n->Store->Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, - SWIZZLE_NIL, SWIZZLE_NIL); - break; - case 3: - n->Store->Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, - SWIZZLE_Z, SWIZZLE_NIL); - break; - default: - n->Store->Swizzle = SWIZZLE_XYZW; - } - - assert(n->Store->Index >= 0); - - return NULL; /* no instruction */ -} - - -/** - * Emit code for a variable declaration. - * This usually doesn't result in any code generation, but just - * memory allocation. - */ -static struct prog_instruction * -emit_var_decl(slang_emit_info *emitInfo, slang_ir_node *n) -{ - assert(n->Store); - assert(n->Store->File != PROGRAM_UNDEFINED); - assert(n->Store->Size > 0); - /*assert(n->Store->Index < 0);*/ - - if (!n->Var || n->Var->isTemp) { - /* a nameless/temporary variable, will be freed after first use */ - /*NEW*/ - if (n->Store->Index < 0 && !_slang_alloc_temp(emitInfo->vt, n->Store)) { - slang_info_log_error(emitInfo->log, - "Ran out of registers, too many temporaries"); - return NULL; - } - } - else { - /* a regular variable */ - _slang_add_variable(emitInfo->vt, n->Var); - if (!_slang_alloc_var(emitInfo->vt, n->Store)) { - slang_info_log_error(emitInfo->log, - "Ran out of registers, too many variables"); - return NULL; - } - /* - printf("IR_VAR_DECL %s %d store %p\n", - (char*) n->Var->a_name, n->Store->Index, (void*) n->Store); - */ - assert(n->Var->store == n->Store); - } - if (emitInfo->EmitComments) { - /* emit NOP with comment describing the variable's storage location */ - char s[1000]; - _mesa_snprintf(s, sizeof(s), "TEMP[%d]%s = variable %s (size %d)", - n->Store->Index, - _mesa_swizzle_string(n->Store->Swizzle, 0, GL_FALSE), - (n->Var ? (char *) n->Var->a_name : "anonymous"), - n->Store->Size); - emit_comment(emitInfo, s); - } - return NULL; -} - - -/** - * Emit code for a reference to a variable. - * Actually, no code is generated but we may do some memory allocation. - * In particular, state vars (uniforms) are allocated on an as-needed basis. - */ -static struct prog_instruction * -emit_var_ref(slang_emit_info *emitInfo, slang_ir_node *n) -{ - assert(n->Store); - assert(n->Store->File != PROGRAM_UNDEFINED); - - if (n->Store->File == PROGRAM_STATE_VAR && n->Store->Index < 0) { - GLboolean direct; - GLint index = _slang_alloc_statevar(n, emitInfo->prog->Parameters, &direct); - if (index < 0) { - /* error */ - char s[100]; - /* XXX isn't this really an out of memory/resources error? */ - _mesa_snprintf(s, sizeof(s), "Undefined variable '%s'", - (char *) n->Var->a_name); - slang_info_log_error(emitInfo->log, s); - return NULL; - } - - n->Store->Index = index; - } - else if (n->Store->File == PROGRAM_UNIFORM || - n->Store->File == PROGRAM_SAMPLER) { - /* mark var as used */ - _mesa_use_uniform(emitInfo->prog->Parameters, (char *) n->Var->a_name); - } - else if (n->Store->File == PROGRAM_INPUT) { - assert(n->Store->Index >= 0); - emitInfo->prog->InputsRead |= (1 << n->Store->Index); - } - - if (n->Store->Index < 0) { - /* probably ran out of registers */ - return NULL; - } - assert(n->Store->Size > 0); - - return NULL; -} - - -static struct prog_instruction * -emit(slang_emit_info *emitInfo, slang_ir_node *n) -{ - struct prog_instruction *inst; - if (!n) - return NULL; - - if (emitInfo->log->error_flag) { - return NULL; - } - - if (n->Comment) { - inst = new_instruction(emitInfo, OPCODE_NOP); - if (inst) { - inst->Comment = _mesa_strdup(n->Comment); - } - inst = NULL; - } - - switch (n->Opcode) { - case IR_SEQ: - /* sequence of two sub-trees */ - assert(n->Children[0]); - assert(n->Children[1]); - emit(emitInfo, n->Children[0]); - if (emitInfo->log->error_flag) - return NULL; - inst = emit(emitInfo, n->Children[1]); -#if 0 - assert(!n->Store); -#endif - n->Store = n->Children[1]->Store; - return inst; - - case IR_SCOPE: - /* new variable scope */ - _slang_push_var_table(emitInfo->vt); - inst = emit(emitInfo, n->Children[0]); - _slang_pop_var_table(emitInfo->vt); - return inst; - - case IR_VAR_DECL: - /* Variable declaration - allocate a register for it */ - inst = emit_var_decl(emitInfo, n); - return inst; - - case IR_VAR: - /* Reference to a variable - * Storage should have already been resolved/allocated. - */ - return emit_var_ref(emitInfo, n); - - case IR_ELEMENT: - return emit_array_element(emitInfo, n); - case IR_FIELD: - return emit_struct_field(emitInfo, n); - case IR_SWIZZLE: - return emit_swizzle(emitInfo, n); - - /* Simple arithmetic */ - /* unary */ - case IR_MOVE: - case IR_RSQ: - case IR_RCP: - case IR_FLOOR: - case IR_FRAC: - case IR_F_TO_I: - case IR_I_TO_F: - case IR_ABS: - case IR_SIN: - case IR_COS: - case IR_DDX: - case IR_DDY: - case IR_EXP: - case IR_EXP2: - case IR_LOG2: - case IR_NOISE1: - case IR_NOISE2: - case IR_NOISE3: - case IR_NOISE4: - case IR_NRM4: - case IR_NRM3: - /* binary */ - case IR_ADD: - case IR_SUB: - case IR_MUL: - case IR_DOT4: - case IR_DOT3: - case IR_DOT2: - case IR_CROSS: - case IR_MIN: - case IR_MAX: - case IR_SEQUAL: - case IR_SNEQUAL: - case IR_SGE: - case IR_SGT: - case IR_SLE: - case IR_SLT: - case IR_POW: - /* trinary operators */ - case IR_LRP: - case IR_CMP: - return emit_arith(emitInfo, n); - - case IR_EQUAL: - case IR_NOTEQUAL: - return emit_compare(emitInfo, n); - - case IR_CLAMP: - return emit_clamp(emitInfo, n); - case IR_TEX: - case IR_TEXB: - case IR_TEXP: - case IR_TEX_SH: - case IR_TEXB_SH: - case IR_TEXP_SH: - return emit_tex(emitInfo, n); - case IR_NEG: - return emit_negation(emitInfo, n); - case IR_FLOAT: - /* find storage location for this float constant */ - n->Store->Index = _mesa_add_unnamed_constant(emitInfo->prog->Parameters, - n->Value, - n->Store->Size, - &n->Store->Swizzle); - if (n->Store->Index < 0) { - slang_info_log_error(emitInfo->log, "Ran out of space for constants"); - return NULL; - } - return NULL; - - case IR_COPY: - return emit_copy(emitInfo, n); - - case IR_COND: - return emit_cond(emitInfo, n); - - case IR_NOT: - return emit_not(emitInfo, n); - - case IR_LABEL: - return emit_label(emitInfo, n); - - case IR_KILL: - return emit_kill(emitInfo); - - case IR_CALL: - /* new variable scope for subroutines/function calls */ - _slang_push_var_table(emitInfo->vt); - inst = emit_fcall(emitInfo, n); - _slang_pop_var_table(emitInfo->vt); - return inst; - - case IR_IF: - return emit_if(emitInfo, n); - - case IR_LOOP: - return emit_loop(emitInfo, n); - case IR_BREAK_IF_TRUE: - case IR_CONT_IF_TRUE: - return emit_cont_break_if_true(emitInfo, n); - case IR_BREAK: - /* fall-through */ - case IR_CONT: - return emit_cont_break(emitInfo, n); - - case IR_BEGIN_SUB: - return new_instruction(emitInfo, OPCODE_BGNSUB); - case IR_END_SUB: - return new_instruction(emitInfo, OPCODE_ENDSUB); - case IR_RETURN: - return emit_return(emitInfo, n); - - case IR_NOP: - return NULL; - - default: - _mesa_problem(NULL, "Unexpected IR opcode in emit()\n"); - } - return NULL; -} - - -/** - * After code generation, any subroutines will be in separate program - * objects. This function appends all the subroutines onto the main - * program and resolves the linking of all the branch/call instructions. - * XXX this logic should really be part of the linking process... - */ -static void -_slang_resolve_subroutines(slang_emit_info *emitInfo) -{ - GET_CURRENT_CONTEXT(ctx); - struct gl_program *mainP = emitInfo->prog; - GLuint *subroutineLoc, i, total; - - subroutineLoc - = (GLuint *) malloc(emitInfo->NumSubroutines * sizeof(GLuint)); - - /* total number of instructions */ - total = mainP->NumInstructions; - for (i = 0; i < emitInfo->NumSubroutines; i++) { - subroutineLoc[i] = total; - total += emitInfo->Subroutines[i]->NumInstructions; - } - - /* adjust BranchTargets within the functions */ - for (i = 0; i < emitInfo->NumSubroutines; i++) { - struct gl_program *sub = emitInfo->Subroutines[i]; - GLuint j; - for (j = 0; j < sub->NumInstructions; j++) { - struct prog_instruction *inst = sub->Instructions + j; - if (inst->Opcode != OPCODE_CAL && inst->BranchTarget >= 0) { - inst->BranchTarget += subroutineLoc[i]; - } - } - } - - /* append subroutines' instructions after main's instructions */ - mainP->Instructions = _mesa_realloc_instructions(mainP->Instructions, - mainP->NumInstructions, - total); - mainP->NumInstructions = total; - for (i = 0; i < emitInfo->NumSubroutines; i++) { - struct gl_program *sub = emitInfo->Subroutines[i]; - _mesa_copy_instructions(mainP->Instructions + subroutineLoc[i], - sub->Instructions, - sub->NumInstructions); - /* delete subroutine code */ - sub->Parameters = NULL; /* prevent double-free */ - _mesa_reference_program(ctx, &emitInfo->Subroutines[i], NULL); - } - - /* free subroutine list */ - if (emitInfo->Subroutines) { - free(emitInfo->Subroutines); - emitInfo->Subroutines = NULL; - } - emitInfo->NumSubroutines = 0; - - /* Examine CAL instructions. - * At this point, the BranchTarget field of the CAL instruction is - * the number/id of the subroutine to call (an index into the - * emitInfo->Subroutines list). - * Translate that into an actual instruction location now. - */ - for (i = 0; i < mainP->NumInstructions; i++) { - struct prog_instruction *inst = mainP->Instructions + i; - if (inst->Opcode == OPCODE_CAL) { - const GLuint f = inst->BranchTarget; - inst->BranchTarget = subroutineLoc[f]; - } - } - - free(subroutineLoc); -} - - - -/** - * Convert the IR tree into GPU instructions. - * \param n root of IR tree - * \param vt variable table - * \param prog program to put GPU instructions into - * \param pragmas controls codegen options - * \param withEnd if true, emit END opcode at end - * \param log log for emitting errors/warnings/info - */ -GLboolean -_slang_emit_code(slang_ir_node *n, slang_var_table *vt, - struct gl_program *prog, - const struct gl_sl_pragmas *pragmas, - GLboolean withEnd, - slang_info_log *log) -{ - GET_CURRENT_CONTEXT(ctx); - GLboolean success; - slang_emit_info emitInfo; - GLuint maxUniforms; - - emitInfo.log = log; - emitInfo.vt = vt; - emitInfo.prog = prog; - emitInfo.Subroutines = NULL; - emitInfo.NumSubroutines = 0; - emitInfo.MaxInstructions = prog->NumInstructions; - - emitInfo.EmitHighLevelInstructions = ctx->Shader.EmitHighLevelInstructions; - emitInfo.EmitCondCodes = ctx->Shader.EmitCondCodes; - emitInfo.EmitComments = ctx->Shader.EmitComments || pragmas->Debug; - emitInfo.EmitBeginEndSub = GL_TRUE; - - if (!emitInfo.EmitCondCodes) { - emitInfo.EmitHighLevelInstructions = GL_TRUE; - } - - /* Check uniform/constant limits */ - if (prog->Target == GL_FRAGMENT_PROGRAM_ARB) { - maxUniforms = ctx->Const.FragmentProgram.MaxUniformComponents / 4; - } - else { - assert(prog->Target == GL_VERTEX_PROGRAM_ARB); - maxUniforms = ctx->Const.VertexProgram.MaxUniformComponents / 4; - } - if (prog->Parameters->NumParameters > maxUniforms) { - slang_info_log_error(log, "Constant/uniform register limit exceeded " - "(max=%u vec4)", maxUniforms); - - return GL_FALSE; - } - - (void) emit(&emitInfo, n); - - /* finish up by adding the END opcode to program */ - if (withEnd) { - struct prog_instruction *inst; - inst = new_instruction(&emitInfo, OPCODE_END); - if (!inst) { - return GL_FALSE; - } - } - - _slang_resolve_subroutines(&emitInfo); - - success = GL_TRUE; - -#if 0 - printf("*********** End emit code (%u inst):\n", prog->NumInstructions); - _mesa_print_program(prog); - _mesa_print_program_parameters(ctx,prog); -#endif - - return success; -} |