First batch of code for GL_NV_fragment_program.

Re-org of some GL_NV_vertex_program code.
Replace MAX_TEXTURE_UNITS with MAX_TEXTURE_COORD_UNITS and MAX_TEXTURE_IMAGE_UNITS.

1 files changed, 1584 insertions, 0 deletions

diff --git a/src/mesa/main/nvvertparse.c b/src/mesa/main/nvvertparse.c
new file mode 100644
index 00000000000..f0c51e2dddd
--- /dev/null
+++ b/src/mesa/main/nvvertparse.c
@@ -0,0 +1,1584 @@
+/* $Id: nvvertparse.c,v 1.1 2003/01/14 04:55:46 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  Brian Paul   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 nvvertparse.c
+ * \brief NVIDIA vertex program parser.
+ * \author Brian Paul
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "hash.h"
+#include "imports.h"
+#include "macros.h"
+#include "mtypes.h"
+#include "nvprogram.h"
+#include "nvvertparse.h"
+#include "nvvertprog.h"
+
+
+/************************ Symbol Table ******************************/
+
+/* A simple symbol table implementation for ARB_vertex_program
+ * (not used yet)
+ */
+
+#if 000
+struct symbol
+{
+   GLubyte *name;
+   GLint value;
+   struct symbol *next;
+};
+
+static struct symbol *SymbolTable = NULL;
+
+static GLboolean
+IsSymbol(const GLubyte *symbol)
+{
+   struct symbol *s;
+   for (s = SymbolTable; s; s = s->next) {
+      if (strcmp((char *) symbol, (char *)s->name) == 0)
+         return GL_TRUE;
+   }
+   return GL_FALSE;
+}
+
+static GLint
+GetSymbolValue(const GLubyte *symbol)
+{
+   struct symbol *s;
+   for (s = SymbolTable; s; s = s->next) {
+      if (strcmp((char *) symbol, (char *)s->name) == 0)
+         return s->value;
+   }
+   return 0;
+}
+
+static void
+AddSymbol(const GLubyte *symbol, GLint value)
+{
+   struct symbol *s = MALLOC_STRUCT(symbol);
+   if (s) {
+      s->name = (GLubyte *) strdup((char *) symbol);
+      s->value = value;
+      s->next = SymbolTable;
+      SymbolTable = s;
+   }
+}
+
+static void
+ResetSymbolTable(void)
+{
+   struct symbol *s, *next;
+   for (s = SymbolTable; s; s = next) {
+      next = s->next;
+      FREE(s->name);
+      FREE(s);
+      s = next;
+   }   
+   SymbolTable = NULL;
+}
+#endif
+
+/***************************** Parsing ******************************/
+
+
+static GLboolean IsLetter(GLubyte b)
+{
+   return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z');
+}
+
+
+static GLboolean IsDigit(GLubyte b)
+{
+   return b >= '0' && b <= '9';
+}
+
+
+static GLboolean IsWhitespace(GLubyte b)
+{
+   return b == ' ' || b == '\t' || b == '\n' || b == '\r';
+}
+
+
+/**
+ * Starting at 'str' find the next token.  A token can be an integer,
+ * an identifier or punctuation symbol.
+ * \return <= 0 we found an error, else, return number of characters parsed.
+ */
+static GLint
+GetToken(const GLubyte *str, GLubyte *token)
+{
+   GLint i = 0, j = 0;
+
+   token[0] = 0;
+
+   /* skip whitespace and comments */
+   while (str[i] && (IsWhitespace(str[i]) || str[i] == '#')) {
+      if (str[i] == '#') {
+         /* skip comment */
+         while (str[i] && (str[i] != '\n' && str[i] != '\r')) {
+            i++;
+         }
+      }
+      else {
+         /* skip whitespace */
+         i++;
+      }
+   }
+
+   if (str[i] == 0)
+      return -i;
+
+   /* try matching an integer */
+   while (str[i] && IsDigit(str[i])) {
+      token[j++] = str[i++];
+   }
+   if (j > 0 || !str[i]) {
+      token[j] = 0;
+      return i;
+   }
+
+   /* try matching an identifier */
+   if (IsLetter(str[i])) {
+      while (str[i] && (IsLetter(str[i]) || IsDigit(str[i]))) {
+         token[j++] = str[i++];
+      }
+      token[j] = 0;
+      return i;
+   }
+
+   /* punctuation */
+   if (str[i]) {
+      token[0] = str[i++];
+      token[1] = 0;
+      return i;
+   }
+
+   /* end of input */
+   token[0] = 0;
+   return i;
+}
+
+
+/**
+ * Get next token from input stream and increment stream pointer past token.
+ */
+static GLboolean
+Parse_Token(const GLubyte **s, GLubyte *token)
+{
+   GLint i;
+   i = GetToken(*s, token);
+   if (i <= 0) {
+      *s += (-i);
+      return GL_FALSE;
+   }
+   *s += i;
+   return GL_TRUE;
+}
+
+
+/**
+ * Get next token from input stream but don't increment stream pointer.
+ */
+static GLboolean
+Peek_Token(const GLubyte **s, GLubyte *token)
+{
+   GLint i, len;
+   i = GetToken(*s, token);
+   if (i <= 0) {
+      *s += (-i);
+      return GL_FALSE;
+   }
+   len = _mesa_strlen((char *) token);
+   *s += (i - len);
+   return GL_TRUE;
+}
+
+
+/**
+ * String equality test
+ */
+static GLboolean
+StrEq(const GLubyte *a, const GLubyte *b)
+{
+   GLint i;
+   for (i = 0; a[i] && b[i] && a[i] == b[i]; i++)
+      ;
+   if (a[i] == 0 && b[i] == 0)
+      return GL_TRUE;
+   else
+      return GL_FALSE;
+}
+
+
+/**********************************************************************/
+
+static const char *InputRegisters[] = {
+   "OPOS", "WGHT", "NRML", "COL0", "COL1", "FOGC", "6", "7",
+   "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL
+};
+
+static const char *OutputRegisters[] = {
+   "HPOS", "COL0", "COL1", "BFC0", "BFC1", "FOGC", "PSIZ",
+   "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL
+};
+
+static const char *Opcodes[] = {
+   "MOV", "LIT", "RCP", "RSQ", "EXP", "LOG", "MUL", "ADD", "DP3", "DP4",
+   "DST", "MIN", "MAX", "SLT", "SGE", "MAD", "ARL", "DPH", "RCC", "SUB",
+   "ABS", "END", NULL
+};
+
+
+#ifdef DEBUG
+
+#define PARSE_ERROR						\
+do {								\
+   _mesa_printf("vpparse.c error at %d: parse error\n", __LINE__);	\
+   return GL_FALSE;						\
+} while(0)
+
+#define PARSE_ERROR1(msg)					\
+do {								\
+   _mesa_printf("vpparse.c error at %d: %s\n", __LINE__, msg);	\
+   return GL_FALSE;						\
+} while(0)
+
+#define PARSE_ERROR2(msg1, msg2)					\
+do {									\
+   _mesa_printf("vpparse.c error at %d: %s %s\n", __LINE__, msg1, msg2);	\
+   return GL_FALSE;							\
+} while(0)
+
+#else
+
+#define PARSE_ERROR                return GL_FALSE
+#define PARSE_ERROR1(msg1)         return GL_FALSE
+#define PARSE_ERROR2(msg1, msg2)   return GL_FALSE
+
+#endif
+
+
+static GLuint
+IsProgRegister(GLuint r)
+{
+   return (GLuint) (r >= VP_PROG_REG_START && r <= VP_PROG_REG_END);
+}
+
+static GLuint
+IsInputRegister(GLuint r)
+{
+   return (GLuint) (r >= VP_INPUT_REG_START && r <= VP_INPUT_REG_END);
+}
+
+static GLuint
+IsOutputRegister(GLuint r)
+{
+   return (GLuint) (r >= VP_OUTPUT_REG_START && r <= VP_OUTPUT_REG_END);
+}
+
+
+
+/**********************************************************************/
+
+/* XXX
+ * These shouldn't be globals as that makes the parser non-reentrant.
+ * We should really define a "ParserContext" class which contains these
+ * and the <s> pointer into the program text.
+ */
+static GLboolean IsStateProgram = GL_FALSE;
+static GLboolean IsPositionInvariant = GL_FALSE;
+static GLboolean IsVersion1_1 = GL_FALSE;
+
+/**
+ * Try to match 'pattern' as the next token after any whitespace/comments.
+ */
+static GLboolean
+Parse_String(const GLubyte **s, const char *pattern)
+{
+   GLint i;
+
+   /* skip whitespace and comments */
+   while (IsWhitespace(**s) || **s == '#') {
+      if (**s == '#') {
+         while (**s && (**s != '\n' && **s != '\r')) {
+            *s += 1;
+         }
+      }
+      else {
+         /* skip whitespace */
+         *s += 1;
+      }
+   }
+
+   /* Try to match the pattern */
+   for (i = 0; pattern[i]; i++) {
+      if (**s != pattern[i])
+         PARSE_ERROR2("failed to match", pattern); /* failure */
+      *s += 1;
+   }
+
+   return GL_TRUE; /* success */
+}
+
+
+/**
+ * Parse a temporary register: Rnn
+ */
+static GLboolean
+Parse_TempReg(const GLubyte **s, GLint *tempRegNum)
+{
+   GLubyte token[100];
+
+   /* Should be 'R##' */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+   if (token[0] != 'R')
+      PARSE_ERROR1("Expected R##");
+
+   if (IsDigit(token[1])) {
+      GLint reg = _mesa_atoi((char *) (token + 1));
+      if (reg >= VP_NUM_TEMP_REGS)
+         PARSE_ERROR1("Bad temporary register name");
+      *tempRegNum = VP_TEMP_REG_START + reg;
+   }
+   else {
+      PARSE_ERROR1("Bad temporary register name");
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse address register "A0.x"
+ */
+static GLboolean
+Parse_AddrReg(const GLubyte **s)
+{
+   /* match 'A0' */
+   if (!Parse_String(s, "A0"))
+      PARSE_ERROR;
+
+   /* match '.' */
+   if (!Parse_String(s, "."))
+      PARSE_ERROR;
+
+   /* match 'x' */
+   if (!Parse_String(s, "x"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse absolute program parameter register "c[##]"
+ */
+static GLboolean
+Parse_AbsParamReg(const GLubyte **s, GLint *regNum)
+{
+   GLubyte token[100];
+
+   if (!Parse_String(s, "c"))
+      PARSE_ERROR;
+
+   if (!Parse_String(s, "["))
+      PARSE_ERROR;
+
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (IsDigit(token[0])) {
+      /* a numbered program parameter register */
+      GLint reg = _mesa_atoi((char *) token);
+      if (reg >= VP_NUM_PROG_REGS)
+         PARSE_ERROR1("Bad constant program number");
+      *regNum = VP_PROG_REG_START + reg;
+   }
+   else {
+      PARSE_ERROR;
+   }
+
+   if (!Parse_String(s, "]"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_ParamReg(const GLubyte **s, struct vp_src_register *srcReg)
+{
+   GLubyte token[100];
+
+   if (!Parse_String(s, "c"))
+      PARSE_ERROR;
+
+   if (!Parse_String(s, "["))
+      PARSE_ERROR;
+
+   if (!Peek_Token(s, token))
+      PARSE_ERROR;
+
+   if (IsDigit(token[0])) {
+      /* a numbered program parameter register */
+      GLint reg;
+      (void) Parse_Token(s, token);
+      reg = _mesa_atoi((char *) token);
+      if (reg >= VP_NUM_PROG_REGS)
+         PARSE_ERROR1("Bad constant program number");
+      srcReg->Register = VP_PROG_REG_START + reg;
+   }
+   else if (StrEq(token, (GLubyte *) "A0")) {
+      /* address register "A0.x" */
+      if (!Parse_AddrReg(s))
+         PARSE_ERROR;
+
+      srcReg->RelAddr = GL_TRUE;
+      srcReg->Register = 0;
+
+      /* Look for +/-N offset */
+      if (!Peek_Token(s, token))
+         PARSE_ERROR;
+
+      if (token[0] == '-' || token[0] == '+') {
+         const GLubyte sign = token[0];
+         (void) Parse_Token(s, token); /* consume +/- */
+
+         /* an integer should be next */
+         if (!Parse_Token(s, token))
+            PARSE_ERROR;
+
+         if (IsDigit(token[0])) {
+            const GLint k = _mesa_atoi((char *) token);
+            if (sign == '-') {
+               if (k > 64)
+                  PARSE_ERROR1("Bad address offset");
+               srcReg->Register = -k;
+            }
+            else {
+               if (k > 63)
+                  PARSE_ERROR1("Bad address offset");
+               srcReg->Register = k;
+            }
+         }
+         else {
+            PARSE_ERROR;
+         }
+      }
+      else {
+         /* probably got a ']', catch it below */
+      }
+   }
+   else {
+      PARSE_ERROR;
+   }
+
+   /* Match closing ']' */
+   if (!Parse_String(s, "]"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse v[#] or v[<name>]
+ */
+static GLboolean
+Parse_AttribReg(const GLubyte **s, GLint *tempRegNum)
+{
+   GLubyte token[100];
+   GLint j;
+
+   /* Match 'v' */
+   if (!Parse_String(s, "v"))
+      PARSE_ERROR;
+
+   /* Match '[' */
+   if (!Parse_String(s, "["))
+      PARSE_ERROR;
+
+   /* match number or named register */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (IsStateProgram && token[0] != '0')
+      PARSE_ERROR1("Only v[0] accessible in vertex state programs");
+
+   if (IsDigit(token[0])) {
+      GLint reg = _mesa_atoi((char *) token);
+      if (reg >= VP_NUM_INPUT_REGS)
+         PARSE_ERROR1("Bad vertex attribute register name");
+      *tempRegNum = VP_INPUT_REG_START + reg;
+   }
+   else {
+      for (j = 0; InputRegisters[j]; j++) {
+         if (StrEq(token, (const GLubyte *) InputRegisters[j])) {
+            *tempRegNum = VP_INPUT_REG_START + j;
+            break;
+         }
+      }
+      if (!InputRegisters[j]) {
+         /* unknown input register label */
+         PARSE_ERROR2("Bad register name", token);
+      }
+   }
+
+   /* Match '[' */
+   if (!Parse_String(s, "]"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_OutputReg(const GLubyte **s, GLint *outputRegNum)
+{
+   GLubyte token[100];
+   GLint start, j;
+
+   /* Match 'o' */
+   if (!Parse_String(s, "o"))
+      PARSE_ERROR;
+
+   /* Match '[' */
+   if (!Parse_String(s, "["))
+      PARSE_ERROR;
+
+   /* Get output reg name */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (IsPositionInvariant)
+      start = 1; /* skip HPOS register name */
+   else
+      start = 0;
+
+   /* try to match an output register name */
+   for (j = start; OutputRegisters[j]; j++) {
+      if (StrEq(token, (const GLubyte *) OutputRegisters[j])) {
+         *outputRegNum = VP_OUTPUT_REG_START + j;
+         break;
+      }
+   }
+   if (!OutputRegisters[j])
+      PARSE_ERROR1("Unrecognized output register name");
+
+   /* Match ']' */
+   if (!Parse_String(s, "]"))
+      PARSE_ERROR1("Expected ]");
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_MaskedDstReg(const GLubyte **s, struct vp_dst_register *dstReg)
+{
+   GLubyte token[100];
+
+   /* Dst reg can be R<n> or o[n] */
+   if (!Peek_Token(s, token))
+      PARSE_ERROR;
+
+   if (token[0] == 'R') {
+      /* a temporary register */
+      if (!Parse_TempReg(s, &dstReg->Register))
+         PARSE_ERROR;
+   }
+   else if (!IsStateProgram && token[0] == 'o') {
+      /* an output register */
+      if (!Parse_OutputReg(s, &dstReg->Register))
+         PARSE_ERROR;
+   }
+   else if (IsStateProgram && token[0] == 'c') {
+      /* absolute program parameter register */
+      if (!Parse_AbsParamReg(s, &dstReg->Register))
+         PARSE_ERROR;
+   }
+   else {
+      PARSE_ERROR1("Bad destination register name");
+   }
+
+   /* Parse optional write mask */
+   if (!Peek_Token(s, token))
+      PARSE_ERROR;
+
+   if (token[0] == '.') {
+      /* got a mask */
+      GLint k = 0;
+
+      if (!Parse_String(s, "."))
+         PARSE_ERROR;
+
+      if (!Parse_Token(s, token))
+         PARSE_ERROR;
+
+      dstReg->WriteMask[0] = GL_FALSE;
+      dstReg->WriteMask[1] = GL_FALSE;
+      dstReg->WriteMask[2] = GL_FALSE;
+      dstReg->WriteMask[3] = GL_FALSE;
+
+      if (token[k] == 'x') {
+         dstReg->WriteMask[0] = GL_TRUE;
+         k++;
+      }
+      if (token[k] == 'y') {
+         dstReg->WriteMask[1] = GL_TRUE;
+         k++;
+      }
+      if (token[k] == 'z') {
+         dstReg->WriteMask[2] = GL_TRUE;
+         k++;
+      }
+      if (token[k] == 'w') {
+         dstReg->WriteMask[3] = GL_TRUE;
+         k++;
+      }
+      if (k == 0) {
+         PARSE_ERROR1("Bad writemask character");
+      }
+      return GL_TRUE;
+   }
+   else {
+      dstReg->WriteMask[0] = GL_TRUE;
+      dstReg->WriteMask[1] = GL_TRUE;
+      dstReg->WriteMask[2] = GL_TRUE;
+      dstReg->WriteMask[3] = GL_TRUE;
+      return GL_TRUE;
+   }
+}
+
+
+static GLboolean
+Parse_SwizzleSrcReg(const GLubyte **s, struct vp_src_register *srcReg)
+{
+   GLubyte token[100];
+
+   srcReg->RelAddr = GL_FALSE;
+
+   /* check for '-' */
+   if (!Peek_Token(s, token))
+      PARSE_ERROR;
+   if (token[0] == '-') {
+      (void) Parse_String(s, "-");
+      srcReg->Negate = GL_TRUE;
+      if (!Peek_Token(s, token))
+         PARSE_ERROR;
+   }
+   else {
+      srcReg->Negate = GL_FALSE;
+   }
+
+   /* Src reg can be R<n>, c[n], c[n +/- offset], or a named vertex attrib */
+   if (token[0] == 'R') {
+      if (!Parse_TempReg(s, &srcReg->Register))
+         PARSE_ERROR;
+   }
+   else if (token[0] == 'c') {
+      if (!Parse_ParamReg(s, srcReg))
+         PARSE_ERROR;
+   }
+   else if (token[0] == 'v') {
+      if (!Parse_AttribReg(s, &srcReg->Register))
+         PARSE_ERROR;
+   }
+   else {
+      PARSE_ERROR2("Bad source register name", token);
+   }
+
+   /* init swizzle fields */
+   srcReg->Swizzle[0] = 0;
+   srcReg->Swizzle[1] = 1;
+   srcReg->Swizzle[2] = 2;
+   srcReg->Swizzle[3] = 3;
+
+   /* Look for optional swizzle suffix */
+   if (!Peek_Token(s, token))
+      PARSE_ERROR;
+   if (token[0] == '.') {
+      (void) Parse_String(s, ".");  /* consume . */
+
+      if (!Parse_Token(s, token))
+         PARSE_ERROR;
+
+      if (token[1] == 0) {
+         /* single letter swizzle */
+         if (token[0] == 'x')
+            ASSIGN_4V(srcReg->Swizzle, 0, 0, 0, 0);
+         else if (token[0] == 'y')
+            ASSIGN_4V(srcReg->Swizzle, 1, 1, 1, 1);
+         else if (token[0] == 'z')
+            ASSIGN_4V(srcReg->Swizzle, 2, 2, 2, 2);
+         else if (token[0] == 'w')
+            ASSIGN_4V(srcReg->Swizzle, 3, 3, 3, 3);
+         else
+            PARSE_ERROR1("Expected x, y, z, or w");
+      }
+      else {
+         /* 2, 3 or 4-component swizzle */
+         GLint k;
+         for (k = 0; token[k] && k < 5; k++) {
+            if (token[k] == 'x')
+               srcReg->Swizzle[k] = 0;
+            else if (token[k] == 'y')
+               srcReg->Swizzle[k] = 1;
+            else if (token[k] == 'z')
+               srcReg->Swizzle[k] = 2;
+            else if (token[k] == 'w')
+               srcReg->Swizzle[k] = 3;
+            else
+               PARSE_ERROR;
+         }
+         if (k >= 5)
+            PARSE_ERROR;
+      }
+   }
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_ScalarSrcReg(const GLubyte **s, struct vp_src_register *srcReg)
+{
+   GLubyte token[100];
+
+   srcReg->RelAddr = GL_FALSE;
+
+   /* check for '-' */
+   if (!Peek_Token(s, token))
+      PARSE_ERROR;
+   if (token[0] == '-') {
+      srcReg->Negate = GL_TRUE;
+      (void) Parse_String(s, "-"); /* consume '-' */
+      if (!Peek_Token(s, token))
+         PARSE_ERROR;
+   }
+   else {
+      srcReg->Negate = GL_FALSE;
+   }
+
+   /* Src reg can be R<n>, c[n], c[n +/- offset], or a named vertex attrib */
+   if (token[0] == 'R') {
+      if (!Parse_TempReg(s, &srcReg->Register))
+         PARSE_ERROR;
+   }
+   else if (token[0] == 'c') {
+      if (!Parse_ParamReg(s, srcReg))
+         PARSE_ERROR;
+   }
+   else if (token[0] == 'v') {
+      if (!Parse_AttribReg(s, &srcReg->Register))
+         PARSE_ERROR;
+   }
+   else {
+      PARSE_ERROR2("Bad source register name", token);
+   }
+
+   /* Look for .[xyzw] suffix */
+   if (!Parse_String(s, "."))
+      PARSE_ERROR;
+
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (token[0] == 'x' && token[1] == 0) {
+      srcReg->Swizzle[0] = 0;
+   }
+   else if (token[0] == 'y' && token[1] == 0) {
+      srcReg->Swizzle[0] = 1;
+   }
+   else if (token[0] == 'z' && token[1] == 0) {
+      srcReg->Swizzle[0] = 2;
+   }
+   else if (token[0] == 'w' && token[1] == 0) {
+      srcReg->Swizzle[0] = 3;
+   }
+   else {
+      PARSE_ERROR1("Bad scalar source suffix");
+   }
+   srcReg->Swizzle[1] = srcReg->Swizzle[2] = srcReg->Swizzle[3] = 0;
+
+   return GL_TRUE;
+}
+
+
+static GLint
+Parse_UnaryOpInstruction(const GLubyte **s, struct vp_instruction *inst)
+{
+   GLubyte token[100];
+
+   /* opcode */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (StrEq(token, (GLubyte *) "MOV")) {
+      inst->Opcode = VP_OPCODE_MOV;
+   }
+   else if (StrEq(token, (GLubyte *) "LIT")) {
+      inst->Opcode = VP_OPCODE_LIT;
+   }
+   else if (StrEq(token, (GLubyte *) "ABS") && IsVersion1_1) {
+      inst->Opcode = VP_OPCODE_ABS;
+   }
+   else {
+      PARSE_ERROR;
+   }
+
+   /* dest reg */
+   if (!Parse_MaskedDstReg(s, &inst->DstReg))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* src arg */
+   if (!Parse_SwizzleSrcReg(s, &inst->SrcReg[0]))
+      PARSE_ERROR;
+
+   /* semicolon */
+   if (!Parse_String(s, ";"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_BiOpInstruction(const GLubyte **s, struct vp_instruction *inst)
+{
+   GLubyte token[100];
+
+   /* opcode */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (StrEq(token, (GLubyte *) "MUL")) {
+      inst->Opcode = VP_OPCODE_MUL;
+   }
+   else if (StrEq(token, (GLubyte *) "ADD")) {
+      inst->Opcode = VP_OPCODE_ADD;
+   }
+   else if (StrEq(token, (GLubyte *) "DP3")) {
+      inst->Opcode = VP_OPCODE_DP3;
+   }
+   else if (StrEq(token, (GLubyte *) "DP4")) {
+      inst->Opcode = VP_OPCODE_DP4;
+   }
+   else if (StrEq(token, (GLubyte *) "DST")) {
+      inst->Opcode = VP_OPCODE_DST;
+   }
+   else if (StrEq(token, (GLubyte *) "MIN")) {
+      inst->Opcode = VP_OPCODE_ADD;
+   }
+   else if (StrEq(token, (GLubyte *) "MAX")) {
+      inst->Opcode = VP_OPCODE_ADD;
+   }
+   else if (StrEq(token, (GLubyte *) "SLT")) {
+      inst->Opcode = VP_OPCODE_SLT;
+   }
+   else if (StrEq(token, (GLubyte *) "SGE")) {
+      inst->Opcode = VP_OPCODE_SGE;
+   }
+   else if (StrEq(token, (GLubyte *) "DPH") && IsVersion1_1) {
+      inst->Opcode = VP_OPCODE_DPH;
+   }
+   else if (StrEq(token, (GLubyte *) "SUB") && IsVersion1_1) {
+      inst->Opcode = VP_OPCODE_SUB;
+   }
+   else {
+      PARSE_ERROR;
+   }
+
+   /* dest reg */
+   if (!Parse_MaskedDstReg(s, &inst->DstReg))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* first src arg */
+   if (!Parse_SwizzleSrcReg(s, &inst->SrcReg[0]))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* second src arg */
+   if (!Parse_SwizzleSrcReg(s, &inst->SrcReg[1]))
+      PARSE_ERROR;
+
+   /* semicolon */
+   if (!Parse_String(s, ";"))
+      PARSE_ERROR;
+
+   /* make sure we don't reference more than one program parameter register */
+   if (IsProgRegister(inst->SrcReg[0].Register) &&
+       IsProgRegister(inst->SrcReg[1].Register) &&
+       inst->SrcReg[0].Register != inst->SrcReg[1].Register)
+      PARSE_ERROR1("Can't reference two program parameter registers");
+
+   /* make sure we don't reference more than one vertex attribute register */
+   if (IsInputRegister(inst->SrcReg[0].Register) &&
+       IsInputRegister(inst->SrcReg[1].Register) &&
+       inst->SrcReg[0].Register != inst->SrcReg[1].Register)
+      PARSE_ERROR1("Can't reference two vertex attribute registers");
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_TriOpInstruction(const GLubyte **s, struct vp_instruction *inst)
+{
+   GLubyte token[100];
+
+   /* opcode */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (StrEq(token, (GLubyte *) "MAD")) {
+      inst->Opcode = VP_OPCODE_MAD;
+   }
+   else {
+      PARSE_ERROR;
+   }
+
+   /* dest reg */
+   if (!Parse_MaskedDstReg(s, &inst->DstReg))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* first src arg */
+   if (!Parse_SwizzleSrcReg(s, &inst->SrcReg[0]))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* second src arg */
+   if (!Parse_SwizzleSrcReg(s, &inst->SrcReg[1]))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* third src arg */
+   if (!Parse_SwizzleSrcReg(s, &inst->SrcReg[2]))
+      PARSE_ERROR;
+
+   /* semicolon */
+   if (!Parse_String(s, ";"))
+      PARSE_ERROR;
+
+   /* make sure we don't reference more than one program parameter register */
+   if ((IsProgRegister(inst->SrcReg[0].Register) &&
+        IsProgRegister(inst->SrcReg[1].Register) &&
+        inst->SrcReg[0].Register != inst->SrcReg[1].Register) ||
+       (IsProgRegister(inst->SrcReg[0].Register) &&
+        IsProgRegister(inst->SrcReg[2].Register) &&
+        inst->SrcReg[0].Register != inst->SrcReg[2].Register) ||
+       (IsProgRegister(inst->SrcReg[1].Register) &&
+        IsProgRegister(inst->SrcReg[2].Register) &&
+        inst->SrcReg[1].Register != inst->SrcReg[2].Register))
+      PARSE_ERROR1("Can only reference one program register");
+
+   /* make sure we don't reference more than one vertex attribute register */
+   if ((IsInputRegister(inst->SrcReg[0].Register) &&
+        IsInputRegister(inst->SrcReg[1].Register) &&
+        inst->SrcReg[0].Register != inst->SrcReg[1].Register) ||
+       (IsInputRegister(inst->SrcReg[0].Register) &&
+        IsInputRegister(inst->SrcReg[2].Register) &&
+        inst->SrcReg[0].Register != inst->SrcReg[2].Register) ||
+       (IsInputRegister(inst->SrcReg[1].Register) &&
+        IsInputRegister(inst->SrcReg[2].Register) &&
+        inst->SrcReg[1].Register != inst->SrcReg[2].Register))
+      PARSE_ERROR1("Can only reference one input register");
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_ScalarInstruction(const GLubyte **s, struct vp_instruction *inst)
+{
+   GLubyte token[100];
+
+   /* opcode */
+   if (!Parse_Token(s, token))
+      PARSE_ERROR;
+
+   if (StrEq(token, (GLubyte *) "RCP")) {
+      inst->Opcode = VP_OPCODE_RCP;
+   }
+   else if (StrEq(token, (GLubyte *) "RSQ")) {
+      inst->Opcode = VP_OPCODE_RSQ;
+   }
+   else if (StrEq(token, (GLubyte *) "EXP")) {
+      inst->Opcode = VP_OPCODE_EXP;
+   }
+   else if (StrEq(token, (GLubyte *) "LOG")) {
+      inst->Opcode = VP_OPCODE_LOG;
+   }
+   else if (StrEq(token, (GLubyte *) "RCC") && IsVersion1_1) {
+      inst->Opcode = VP_OPCODE_RCC;
+   }
+   else {
+      PARSE_ERROR;
+   }
+
+   /* dest reg */
+   if (!Parse_MaskedDstReg(s, &inst->DstReg))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* first src arg */
+   if (!Parse_ScalarSrcReg(s, &inst->SrcReg[0]))
+      PARSE_ERROR;
+
+   /* semicolon */
+   if (!Parse_String(s, ";"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_AddressInstruction(const GLubyte **s, struct vp_instruction *inst)
+{
+   inst->Opcode = VP_OPCODE_ARL;
+
+   /* opcode */
+   if (!Parse_String(s, "ARL"))
+      PARSE_ERROR;
+
+   /* dest A0 reg */
+   if (!Parse_AddrReg(s))
+      PARSE_ERROR;
+
+   /* comma */
+   if (!Parse_String(s, ","))
+      PARSE_ERROR;
+
+   /* parse src reg */
+   if (!Parse_ScalarSrcReg(s, &inst->SrcReg[0]))
+      PARSE_ERROR;
+
+   /* semicolon */
+   if (!Parse_String(s, ";"))
+      PARSE_ERROR;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_EndInstruction(const GLubyte **s, struct vp_instruction *inst)
+{
+   GLubyte token[100];
+
+   /* opcode */
+   if (!Parse_String(s, "END"))
+      PARSE_ERROR;
+
+   inst->Opcode = VP_OPCODE_END;
+
+   /* this should fail! */
+   if (Parse_Token(s, token))
+      PARSE_ERROR2("Unexpected token after END:", token);
+   else
+      return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_OptionSequence(const GLubyte **s, struct vp_instruction program[])
+{
+   while (1) {
+      GLubyte token[100];
+      if (!Peek_Token(s, token)) {
+         PARSE_ERROR1("Unexpected end of input");
+         return GL_FALSE; /* end of input */
+      }
+
+      if (!StrEq(token, (GLubyte *) "OPTION"))
+         return GL_TRUE;  /* probably an instruction */
+
+      Parse_Token(s, token);
+
+      if (!Parse_String(s, "NV_position_invariant"))
+         return GL_FALSE;
+      if (!Parse_String(s, ";"))
+         return GL_FALSE;
+      IsPositionInvariant = GL_TRUE;
+   }
+}
+
+
+static GLboolean
+Parse_InstructionSequence(const GLubyte **s, struct vp_instruction program[])
+{
+   GLubyte token[100];
+   GLint count = 0;
+
+   while (1) {
+      struct vp_instruction *inst = program + count;
+
+      /* Initialize the instruction */
+      inst->SrcReg[0].Register = -1;
+      inst->SrcReg[1].Register = -1;
+      inst->SrcReg[2].Register = -1;
+      inst->DstReg.Register = -1;
+
+      if (!Peek_Token(s, token))
+         PARSE_ERROR;
+
+      if (StrEq(token, (GLubyte *) "MOV") ||
+          StrEq(token, (GLubyte *) "LIT") ||
+          StrEq(token, (GLubyte *) "ABS")) {
+         if (!Parse_UnaryOpInstruction(s, inst))
+            PARSE_ERROR;
+      }
+      else if (StrEq(token, (GLubyte *) "MUL") ||
+          StrEq(token, (GLubyte *) "ADD") ||
+          StrEq(token, (GLubyte *) "DP3") ||
+          StrEq(token, (GLubyte *) "DP4") ||
+          StrEq(token, (GLubyte *) "DST") ||
+          StrEq(token, (GLubyte *) "MIN") ||
+          StrEq(token, (GLubyte *) "MAX") ||
+          StrEq(token, (GLubyte *) "SLT") ||
+          StrEq(token, (GLubyte *) "SGE") ||
+          StrEq(token, (GLubyte *) "DPH") ||
+          StrEq(token, (GLubyte *) "SUB")) {
+         if (!Parse_BiOpInstruction(s, inst))
+            PARSE_ERROR;
+      }
+      else if (StrEq(token, (GLubyte *) "MAD")) {
+         if (!Parse_TriOpInstruction(s, inst))
+            PARSE_ERROR;
+      }
+      else if (StrEq(token, (GLubyte *) "RCP") ||
+               StrEq(token, (GLubyte *) "RSQ") ||
+               StrEq(token, (GLubyte *) "EXP") ||
+               StrEq(token, (GLubyte *) "LOG") ||
+               StrEq(token, (GLubyte *) "RCC")) {
+         if (!Parse_ScalarInstruction(s, inst))
+            PARSE_ERROR;
+      }
+      else if (StrEq(token, (GLubyte *) "ARL")) {
+         if (!Parse_AddressInstruction(s, inst))
+            PARSE_ERROR;
+      }
+      else if (StrEq(token, (GLubyte *) "END")) {
+         if (!Parse_EndInstruction(s, inst))
+            PARSE_ERROR;
+         else
+            return GL_TRUE;  /* all done */
+      }
+      else {
+         /* bad instruction name */
+         PARSE_ERROR2("Unexpected token: ", token);
+      }
+
+      count++;
+      if (count >= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS)
+         PARSE_ERROR1("Program too long");
+   }
+
+   PARSE_ERROR;
+}
+
+
+static GLboolean
+Parse_Program(const GLubyte **s, struct vp_instruction instBuffer[])
+{
+   if (IsVersion1_1) {
+      if (!Parse_OptionSequence(s, instBuffer)) {
+         return GL_FALSE;
+      }
+   }
+   return Parse_InstructionSequence(s, instBuffer);
+}
+
+
+/**
+ * Parse/compile the 'str' returning the compiled 'program'.
+ * ctx->Program.ErrorPos will be -1 if successful.  Otherwise, ErrorPos
+ * indicates the position of the error in 'str'.
+ */
+void
+_mesa_parse_nv_vertex_program(GLcontext *ctx, GLenum dstTarget,
+                              const GLubyte *str, GLsizei len,
+                              struct vertex_program *program)
+{
+   const GLubyte *s;
+   struct vp_instruction instBuffer[MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS];
+   struct vp_instruction *newInst;
+   GLenum target;
+   GLubyte *programString;
+
+   /* Make a null-terminated copy of the program string */
+   programString = (GLubyte *) MALLOC(len + 1);
+   if (!programString) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");
+      return;
+   }
+   MEMCPY(programString, str, len);
+   programString[len] = 0;
+
+   IsPositionInvariant = GL_FALSE;
+   IsVersion1_1 = GL_FALSE;
+
+   /* check the program header */
+   if (_mesa_strncmp((const char *) programString, "!!VP1.0", 7) == 0) {
+      target = GL_VERTEX_PROGRAM_NV;
+      s = programString + 7;
+      IsStateProgram = GL_FALSE;
+   }
+   else if (_mesa_strncmp((const char *) programString, "!!VP1.1", 7) == 0) {
+      target = GL_VERTEX_PROGRAM_NV;
+      s = programString + 7;
+      IsStateProgram = GL_FALSE;
+      IsVersion1_1 = GL_TRUE;
+   }
+   else if (_mesa_strncmp((const char *) programString, "!!VSP1.0", 8) == 0) {
+      target = GL_VERTEX_STATE_PROGRAM_NV;
+      s = programString + 8;
+      IsStateProgram = GL_TRUE;
+   }
+   else {
+      /* invalid header */
+      ctx->Program.ErrorPos = 0;
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");
+      return;
+   }
+
+   /* make sure target and header match */
+   if (target != dstTarget) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glLoadProgramNV(target mismatch)");
+      return;
+   }
+
+   if (Parse_Program(&s, instBuffer)) {
+      GLuint numInst;
+      GLuint inputsRead = 0;
+      GLuint outputsWritten = 0;
+      GLuint progRegsWritten = 0;
+
+      /* Find length of the program and compute bitmasks to indicate which
+       * vertex input registers are read, which vertex result registers are
+       * written to, and which program registers are written to.
+       * We could actually do this while we parse the program.
+       */
+      for (numInst = 0; instBuffer[numInst].Opcode != VP_OPCODE_END; numInst++) {
+         const GLint srcReg0 = instBuffer[numInst].SrcReg[0].Register;
+         const GLint srcReg1 = instBuffer[numInst].SrcReg[1].Register;
+         const GLint srcReg2 = instBuffer[numInst].SrcReg[2].Register;
+         const GLint dstReg = instBuffer[numInst].DstReg.Register;
+
+         if (IsOutputRegister(dstReg))
+            outputsWritten |= (1 << (dstReg - VP_OUTPUT_REG_START));
+         else if (IsProgRegister(dstReg))
+            progRegsWritten |= (1 << (dstReg - VP_PROG_REG_START));
+         if (IsInputRegister(srcReg0)
+             && !instBuffer[numInst].SrcReg[0].RelAddr)
+            inputsRead |= (1 << (srcReg0 - VP_INPUT_REG_START));
+         if (IsInputRegister(srcReg1)
+             && !instBuffer[numInst].SrcReg[1].RelAddr)
+            inputsRead |= (1 << (srcReg1 - VP_INPUT_REG_START));
+         if (IsInputRegister(srcReg2)
+             && !instBuffer[numInst].SrcReg[2].RelAddr)
+            inputsRead |= (1 << (srcReg2 - VP_INPUT_REG_START));
+      }
+      numInst++;
+
+      if (IsStateProgram) {
+         if (progRegsWritten == 0) {
+            _mesa_error(ctx, GL_INVALID_OPERATION,
+                        "glLoadProgramNV(c[#] not written)");
+            return;
+         }
+      }
+      else {
+         if (!IsPositionInvariant && !(outputsWritten & 1)) {
+            /* bit 1 = HPOS register */
+            _mesa_error(ctx, GL_INVALID_OPERATION,
+                        "glLoadProgramNV(HPOS not written)");
+            return;
+         }
+      }
+
+      program->InputsRead = inputsRead;
+      program->OutputsWritten = outputsWritten;
+      program->IsPositionInvariant = IsPositionInvariant;
+
+      /* copy the compiled instructions */
+      assert(numInst <= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS);
+      newInst = (struct vp_instruction *) MALLOC(numInst * sizeof(struct vp_instruction));
+      if (!newInst) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");
+         FREE(programString);
+         return;  /* out of memory */
+      }
+      MEMCPY(newInst, instBuffer, numInst * sizeof(struct vp_instruction));
+
+      /* install the program */
+      program->Base.Target = target;
+      if (program->Base.String) {
+         FREE(program->Base.String);
+      }
+      program->Base.String = programString;
+      if (program->Instructions) {
+         FREE(program->Instructions);
+      }
+      program->Instructions = newInst;
+
+#ifdef DEBUG_foo
+      _mesa_printf("--- glLoadProgramNV result ---\n");
+      _mesa_print_nv_vertex_program(program);
+      _mesa_printf("------------------------------\n");
+#endif
+   }
+   else {
+      /* Error! */
+#ifdef DEBUG
+      /* print a message showing the program line containing the error */
+      ctx->Program.ErrorPos = s - str;
+      {
+         const GLubyte *p = str, *line = str;
+         int lineNum = 1, statementNum = 1, column = 0;
+         char errorLine[1000];
+         int i;
+         while (*p && p < s) {  /* s is the error position */
+            if (*p == '\n') {
+               line = p + 1;
+               lineNum++;
+               column = 0;
+            }
+            else if (*p == ';') {
+               statementNum++;
+            }
+            else
+               column++;
+            p++;
+         }
+         if (p) {
+            /* Copy the line with the error into errorLine so we can null-
+             * terminate it.
+             */
+            for (i = 0; line[i] != '\n' && line[i]; i++)
+               errorLine[i] = (char) line[i];
+            errorLine[i] = 0;
+         }
+         /*
+         _mesa_debug("Error pos = %d  (%c) col %d\n",
+                 ctx->Program.ErrorPos, *s, column);
+         */
+         _mesa_debug(ctx, "Vertex program error on line %2d: %s\n", lineNum, errorLine);
+         _mesa_debug(ctx, "  (statement %2d) near column %2d: ", statementNum, column+1);
+         for (i = 0; i < column; i++)
+            _mesa_debug(ctx, " ");
+         _mesa_debug(ctx, "^\n");
+      }
+#endif
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV");
+   }
+}
+
+
+static void
+PrintSrcReg(const struct vp_src_register *src)
+{
+   static const char comps[5] = "xyzw";
+   if (src->Negate)
+      _mesa_printf("-");
+   if (src->RelAddr) {
+      if (src->Register > 0)
+         _mesa_printf("c[A0.x + %d]", src->Register);
+      else if (src->Register < 0)
+         _mesa_printf("c[A0.x - %d]", -src->Register);
+      else
+         _mesa_printf("c[A0.x]");
+   }
+   else if (src->Register >= VP_OUTPUT_REG_START
+       && src->Register <= VP_OUTPUT_REG_END) {
+      _mesa_printf("o[%s]", OutputRegisters[src->Register - VP_OUTPUT_REG_START]);
+   }
+   else if (src->Register >= VP_INPUT_REG_START
+            && src->Register <= VP_INPUT_REG_END) {
+      _mesa_printf("v[%s]", InputRegisters[src->Register - VP_INPUT_REG_START]);
+   }
+   else if (src->Register >= VP_PROG_REG_START
+            && src->Register <= VP_PROG_REG_END) {
+      _mesa_printf("c[%d]", src->Register - VP_PROG_REG_START);
+   }
+   else {
+      _mesa_printf("R%d", src->Register - VP_TEMP_REG_START);
+   }
+
+   if (src->Swizzle[0] == src->Swizzle[1] &&
+       src->Swizzle[0] == src->Swizzle[2] &&
+       src->Swizzle[0] == src->Swizzle[3]) {
+      _mesa_printf(".%c", comps[src->Swizzle[0]]);
+   }
+   else if (src->Swizzle[0] != 0 ||
+            src->Swizzle[1] != 1 ||
+            src->Swizzle[2] != 2 ||
+            src->Swizzle[3] != 3) {
+      _mesa_printf(".%c%c%c%c",
+             comps[src->Swizzle[0]],
+             comps[src->Swizzle[1]],
+             comps[src->Swizzle[2]],
+             comps[src->Swizzle[3]]);
+   }
+}
+
+
+static void
+PrintDstReg(const struct vp_dst_register *dst)
+{
+   GLint w = dst->WriteMask[0] + dst->WriteMask[1]
+           + dst->WriteMask[2] + dst->WriteMask[3];
+
+   if (dst->Register >= VP_OUTPUT_REG_START
+       && dst->Register <= VP_OUTPUT_REG_END) {
+      _mesa_printf("o[%s]", OutputRegisters[dst->Register - VP_OUTPUT_REG_START]);
+   }
+   else if (dst->Register >= VP_INPUT_REG_START
+            && dst->Register <= VP_INPUT_REG_END) {
+      _mesa_printf("v[%s]", InputRegisters[dst->Register - VP_INPUT_REG_START]);
+   }
+   else if (dst->Register >= VP_PROG_REG_START
+            && dst->Register <= VP_PROG_REG_END) {
+      _mesa_printf("c[%d]", dst->Register - VP_PROG_REG_START);
+   }
+   else {
+      _mesa_printf("R%d", dst->Register - VP_TEMP_REG_START);
+   }
+
+   if (w != 0 && w != 4) {
+      _mesa_printf(".");
+      if (dst->WriteMask[0])
+         _mesa_printf("x");
+      if (dst->WriteMask[1])
+         _mesa_printf("y");
+      if (dst->WriteMask[2])
+         _mesa_printf("z");
+      if (dst->WriteMask[3])
+         _mesa_printf("w");
+   }
+}
+
+
+/**
+ * Print (unparse) the given vertex program.  Just for debugging.
+ */
+void
+_mesa_print_nv_vertex_program(const struct vertex_program *program)
+{
+   const struct vp_instruction *inst;
+
+   for (inst = program->Instructions; ; inst++) {
+      switch (inst->Opcode) {
+      case VP_OPCODE_MOV:
+      case VP_OPCODE_LIT:
+      case VP_OPCODE_RCP:
+      case VP_OPCODE_RSQ:
+      case VP_OPCODE_EXP:
+      case VP_OPCODE_LOG:
+      case VP_OPCODE_RCC:
+      case VP_OPCODE_ABS:
+         _mesa_printf("%s ", Opcodes[(int) inst->Opcode]);
+         PrintDstReg(&inst->DstReg);
+         _mesa_printf(", ");
+         PrintSrcReg(&inst->SrcReg[0]);
+         _mesa_printf(";\n");
+         break;
+      case VP_OPCODE_MUL:
+      case VP_OPCODE_ADD:
+      case VP_OPCODE_DP3:
+      case VP_OPCODE_DP4:
+      case VP_OPCODE_DST:
+      case VP_OPCODE_MIN:
+      case VP_OPCODE_MAX:
+      case VP_OPCODE_SLT:
+      case VP_OPCODE_SGE:
+      case VP_OPCODE_DPH:
+      case VP_OPCODE_SUB:
+         _mesa_printf("%s ", Opcodes[(int) inst->Opcode]);
+         PrintDstReg(&inst->DstReg);
+         _mesa_printf(", ");
+         PrintSrcReg(&inst->SrcReg[0]);
+         _mesa_printf(", ");
+         PrintSrcReg(&inst->SrcReg[1]);
+         _mesa_printf(";\n");
+         break;
+      case VP_OPCODE_MAD:
+         _mesa_printf("MAD ");
+         PrintDstReg(&inst->DstReg);
+         _mesa_printf(", ");
+         PrintSrcReg(&inst->SrcReg[0]);
+         _mesa_printf(", ");
+         PrintSrcReg(&inst->SrcReg[1]);
+         _mesa_printf(", ");
+         PrintSrcReg(&inst->SrcReg[2]);
+         _mesa_printf(";\n");
+         break;
+      case VP_OPCODE_ARL:
+         _mesa_printf("ARL A0.x, ");
+         PrintSrcReg(&inst->SrcReg[0]);
+         _mesa_printf(";\n");
+         break;
+      case VP_OPCODE_END:
+         _mesa_printf("END\n");
+         return;
+      default:
+         _mesa_printf("BAD INSTRUCTION\n");
+      }
+   }
+}
+