mesa pixman git update 5 aug 2011

1 files changed, 1595 insertions, 1588 deletions

diff --git a/mesalib/src/mesa/program/nvfragparse.c b/mesalib/src/mesa/program/nvfragparse.c
index 04538e071..ce72c610d 100644
--- a/mesalib/src/mesa/program/nvfragparse.c
+++ b/mesalib/src/mesa/program/nvfragparse.c
@@ -1,1588 +1,1595 @@
-/*

- * Mesa 3-D graphics library

- * Version:  6.5

- *

- * Copyright (C) 1999-2005  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 nvfragparse.c

- * NVIDIA fragment program parser.

- * \author Brian Paul

- */

-

-/*

- * Regarding GL_NV_fragment_program:

- *

- * Portions of this software may use or implement intellectual

- * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims

- * any and all warranties with respect to such intellectual property,

- * including any use thereof or modifications thereto.

- */

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "main/imports.h"

-#include "main/macros.h"

-#include "program.h"

-#include "prog_parameter.h"

-#include "prog_print.h"

-#include "prog_instruction.h"

-#include "nvfragparse.h"

-

-

-#define INPUT_1V     1

-#define INPUT_2V     2

-#define INPUT_3V     3

-#define INPUT_1S     4

-#define INPUT_2S     5

-#define INPUT_CC     6

-#define INPUT_1V_T   7  /* one source vector, plus textureId */

-#define INPUT_3V_T   8  /* one source vector, plus textureId */

-#define INPUT_NONE   9

-#define INPUT_1V_S  10  /* a string and a vector register */

-#define OUTPUT_V    20

-#define OUTPUT_S    21

-#define OUTPUT_NONE 22

-

-/* IRIX defines some of these */

-#undef _R

-#undef _H

-#undef _X

-#undef _C

-#undef _S

-

-/* Optional suffixes */

-#define _R  FLOAT32  /* float */

-#define _H  FLOAT16  /* half-float */

-#define _X  FIXED12  /* fixed */

-#define _C  0x08     /* set cond codes */

-#define _S  0x10     /* saturate, clamp result to [0,1] */

-

-struct instruction_pattern {

-   const char *name;

-   enum prog_opcode opcode;

-   GLuint inputs;

-   GLuint outputs;

-   GLuint suffixes;

-};

-

-static const struct instruction_pattern Instructions[] = {

-   { "ADD", OPCODE_ADD, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "COS", OPCODE_COS, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

-   { "DDX", OPCODE_DDX, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },

-   { "DDY", OPCODE_DDY, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },

-   { "DP3", OPCODE_DP3, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },

-   { "DP4", OPCODE_DP4, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },

-   { "DST", OPCODE_DP4, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },

-   { "EX2", OPCODE_DP4, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

-   { "FLR", OPCODE_FLR, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "FRC", OPCODE_FRC, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "KIL", OPCODE_KIL_NV, INPUT_CC, OUTPUT_NONE, 0                },

-   { "LG2", OPCODE_LG2, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

-   { "LIT", OPCODE_LIT, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },

-   { "LRP", OPCODE_LRP, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "MAD", OPCODE_MAD, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "MAX", OPCODE_MAX, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "MIN", OPCODE_MIN, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "MOV", OPCODE_MOV, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "MUL", OPCODE_MUL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "PK2H",  OPCODE_PK2H,  INPUT_1V, OUTPUT_S, 0                  },

-   { "PK2US", OPCODE_PK2US, INPUT_1V, OUTPUT_S, 0                  },

-   { "PK4B",  OPCODE_PK4B,  INPUT_1V, OUTPUT_S, 0                  },

-   { "PK4UB", OPCODE_PK4UB, INPUT_1V, OUTPUT_S, 0                  },

-   { "POW", OPCODE_POW, INPUT_2S, OUTPUT_S, _R | _H |      _C | _S },

-   { "RCP", OPCODE_RCP, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

-   { "RFL", OPCODE_RFL, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },

-   { "RSQ", OPCODE_RSQ, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

-   { "SEQ", OPCODE_SEQ, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SFL", OPCODE_SFL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SGE", OPCODE_SGE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SGT", OPCODE_SGT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SIN", OPCODE_SIN, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

-   { "SLE", OPCODE_SLE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SLT", OPCODE_SLT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SNE", OPCODE_SNE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "STR", OPCODE_STR, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "SUB", OPCODE_SUB, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

-   { "TEX", OPCODE_TEX, INPUT_1V_T, OUTPUT_V,              _C | _S },

-   { "TXD", OPCODE_TXD, INPUT_3V_T, OUTPUT_V,              _C | _S },

-   { "TXP", OPCODE_TXP_NV, INPUT_1V_T, OUTPUT_V,           _C | _S },

-   { "UP2H",  OPCODE_UP2H,  INPUT_1S, OUTPUT_V,            _C | _S },

-   { "UP2US", OPCODE_UP2US, INPUT_1S, OUTPUT_V,            _C | _S },

-   { "UP4B",  OPCODE_UP4B,  INPUT_1S, OUTPUT_V,            _C | _S },

-   { "UP4UB", OPCODE_UP4UB, INPUT_1S, OUTPUT_V,            _C | _S },

-   { "X2D", OPCODE_X2D, INPUT_3V, OUTPUT_V, _R | _H |      _C | _S },

-   { "PRINT", OPCODE_PRINT, INPUT_1V_S, OUTPUT_NONE, 0               },

-   { NULL, (enum prog_opcode) -1, 0, 0, 0 }

-};

-

-

-/*

- * Information needed or computed during parsing.

- * Remember, we can't modify the target program object until we've

- * _successfully_ parsed the program text.

- */

-struct parse_state {

-   struct gl_context *ctx;

-   const GLubyte *start;              /* start of program string */

-   const GLubyte *pos;                /* current position */

-   const GLubyte *curLine;

-   struct gl_fragment_program *program;  /* current program */

-

-   struct gl_program_parameter_list *parameters;

-

-   GLuint numInst;                    /* number of instructions parsed */

-   GLuint inputsRead;                 /* bitmask of input registers used */

-   GLuint outputsWritten;             /* bitmask of 1 << FRAG_OUTPUT_* bits */

-   GLuint texturesUsed[MAX_TEXTURE_IMAGE_UNITS];

-};

-

-

-

-/*

- * Called whenever we find an error during parsing.

- */

-static void

-record_error(struct parse_state *parseState, const char *msg, int lineNo)

-{

-#ifdef DEBUG

-   GLint line, column;

-   const GLubyte *lineStr;

-   lineStr = _mesa_find_line_column(parseState->start,

-                                    parseState->pos, &line, &column);

-   _mesa_debug(parseState->ctx,

-               "nvfragparse.c(%d): line %d, column %d:%s (%s)\n",

-               lineNo, line, column, (char *) lineStr, msg);

-   free((void *) lineStr);

-#else

-   (void) lineNo;

-#endif

-

-   /* Check that no error was already recorded.  Only record the first one. */

-   if (parseState->ctx->Program.ErrorString[0] == 0) {

-      _mesa_set_program_error(parseState->ctx,

-                              parseState->pos - parseState->start,

-                              msg);

-   }

-}

-

-

-#define RETURN_ERROR							\

-do {									\

-   record_error(parseState, "Unexpected end of input.", __LINE__);	\

-   return GL_FALSE;							\

-} while(0)

-

-#define RETURN_ERROR1(msg)						\

-do {									\

-   record_error(parseState, msg, __LINE__);				\

-   return GL_FALSE;							\

-} while(0)

-

-#define RETURN_ERROR2(msg1, msg2)					\

-do {									\

-   char err[1000];							\

-   sprintf(err, "%s %s", msg1, msg2);				\

-   record_error(parseState, err, __LINE__);				\

-   return GL_FALSE;							\

-} while(0)

-

-

-

-

-/*

- * Search a list of instruction structures for a match.

- */

-static struct instruction_pattern

-MatchInstruction(const GLubyte *token)

-{

-   const struct instruction_pattern *inst;

-   struct instruction_pattern result;

-

-   result.name = NULL;

-   result.opcode = MAX_OPCODE; /* i.e. invalid instruction */

-   result.inputs = 0;

-   result.outputs = 0;

-   result.suffixes = 0;

-

-   for (inst = Instructions; inst->name; inst++) {

-      if (strncmp((const char *) token, inst->name, 3) == 0) {

-         /* matched! */

-         int i = 3;

-         result = *inst;

-         result.suffixes = 0;

-         /* look at suffix */

-         if (token[i] == 'R') {

-            result.suffixes |= _R;

-            i++;

-         }

-         else if (token[i] == 'H') {

-            result.suffixes |= _H;

-            i++;

-         }

-         else if (token[i] == 'X') {

-            result.suffixes |= _X;

-            i++;

-         }

-         if (token[i] == 'C') {

-            result.suffixes |= _C;

-            i++;

-         }

-         if (token[i] == '_' && token[i+1] == 'S' &&

-             token[i+2] == 'A' && token[i+3] == 'T') {

-            result.suffixes |= _S;

-         }

-         return result;

-      }

-   }

-

-   return result;

-}

-

-

-

-

-/**********************************************************************/

-

-

-static GLboolean IsLetter(GLubyte b)

-{

-   return (b >= 'a' && b <= 'z') ||

-          (b >= 'A' && b <= 'Z') ||

-          (b == '_') ||

-          (b == '$');

-}

-

-

-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(struct parse_state *parseState, GLubyte *token)

-{

-   const GLubyte *str = parseState->pos;

-   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++;

-         }

-         if (str[i] == '\n' || str[i] == '\r')

-            parseState->curLine = str + i + 1;

-      }

-      else {

-         /* skip whitespace */

-         if (str[i] == '\n' || str[i] == '\r')

-            parseState->curLine = str + i + 1;

-         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 character */

-   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(struct parse_state *parseState, GLubyte *token)

-{

-   GLint i;

-   i = GetToken(parseState, token);

-   if (i <= 0) {

-      parseState->pos += (-i);

-      return GL_FALSE;

-   }

-   parseState->pos += i;

-   return GL_TRUE;

-}

-

-

-/**

- * Get next token from input stream but don't increment stream pointer.

- */

-static GLboolean

-Peek_Token(struct parse_state *parseState, GLubyte *token)

-{

-   GLint i, len;

-   i = GetToken(parseState, token);

-   if (i <= 0) {

-      parseState->pos += (-i);

-      return GL_FALSE;

-   }

-   len = (GLint) strlen((const char *) token);

-   parseState->pos += (i - len);

-   return GL_TRUE;

-}

-

-

-/**********************************************************************/

-

-static const char *InputRegisters[MAX_NV_FRAGMENT_PROGRAM_INPUTS + 1] = {

-   "WPOS", "COL0", "COL1", "FOGC",

-   "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL

-};

-

-

-

-/**********************************************************************/

-

-/**

- * Try to match 'pattern' as the next token after any whitespace/comments.

- */

-static GLboolean

-Parse_String(struct parse_state *parseState, const char *pattern)

-{

-   const GLubyte *m;

-   GLint i;

-

-   /* skip whitespace and comments */

-   while (IsWhitespace(*parseState->pos) || *parseState->pos == '#') {

-      if (*parseState->pos == '#') {

-         while (*parseState->pos && (*parseState->pos != '\n' && *parseState->pos != '\r')) {

-            parseState->pos += 1;

-         }

-         if (*parseState->pos == '\n' || *parseState->pos == '\r')

-            parseState->curLine = parseState->pos + 1;

-      }

-      else {

-         /* skip whitespace */

-         if (*parseState->pos == '\n' || *parseState->pos == '\r')

-            parseState->curLine = parseState->pos + 1;

-         parseState->pos += 1;

-      }

-   }

-

-   /* Try to match the pattern */

-   m = parseState->pos;

-   for (i = 0; pattern[i]; i++) {

-      if (*m != (GLubyte) pattern[i])

-         return GL_FALSE;

-      m += 1;

-   }

-   parseState->pos = m;

-

-   return GL_TRUE; /* success */

-}

-

-

-static GLboolean

-Parse_Identifier(struct parse_state *parseState, GLubyte *ident)

-{

-   if (!Parse_Token(parseState, ident))

-      RETURN_ERROR;

-   if (IsLetter(ident[0]))

-      return GL_TRUE;

-   else

-      RETURN_ERROR1("Expected an identfier");

-}

-

-

-/**

- * Parse a floating point constant, or a defined symbol name.

- * [+/-]N[.N[eN]]

- * Output:  number[0 .. 3] will get the value.

- */

-static GLboolean

-Parse_ScalarConstant(struct parse_state *parseState, GLfloat *number)

-{

-   char *end = NULL;

-

-   *number = (GLfloat) _mesa_strtof((const char *) parseState->pos, &end);

-

-   if (end && end > (char *) parseState->pos) {

-      /* got a number */

-      parseState->pos = (GLubyte *) end;

-      number[1] = *number;

-      number[2] = *number;

-      number[3] = *number;

-      return GL_TRUE;

-   }

-   else {

-      /* should be an identifier */

-      GLubyte ident[100];

-      const GLfloat *constant;

-      if (!Parse_Identifier(parseState, ident))

-         RETURN_ERROR1("Expected an identifier");

-      constant = _mesa_lookup_parameter_value(parseState->parameters,

-                                              -1, (const char *) ident);

-      /* XXX Check that it's a constant and not a parameter */

-      if (!constant) {

-         RETURN_ERROR1("Undefined symbol");

-      }

-      else {

-         COPY_4V(number, constant);

-         return GL_TRUE;

-      }

-   }

-}

-

-

-

-/**

- * Parse a vector constant, one of:

- *   { float }

- *   { float, float }

- *   { float, float, float }

- *   { float, float, float, float }

- */

-static GLboolean

-Parse_VectorConstant(struct parse_state *parseState, GLfloat *vec)

-{

-   /* "{" was already consumed */

-

-   ASSIGN_4V(vec, 0.0, 0.0, 0.0, 1.0);

-

-   if (!Parse_ScalarConstant(parseState, vec+0))  /* X */

-      return GL_FALSE;

-

-   if (Parse_String(parseState, "}")) {

-      return GL_TRUE;

-   }

-

-   if (!Parse_String(parseState, ","))

-      RETURN_ERROR1("Expected comma in vector constant");

-

-   if (!Parse_ScalarConstant(parseState, vec+1))  /* Y */

-      return GL_FALSE;

-

-   if (Parse_String(parseState, "}")) {

-      return GL_TRUE;

-   }

-

-   if (!Parse_String(parseState, ","))

-      RETURN_ERROR1("Expected comma in vector constant");

-

-   if (!Parse_ScalarConstant(parseState, vec+2))  /* Z */

-      return GL_FALSE;

-

-   if (Parse_String(parseState, "}")) {

-      return GL_TRUE;

-   }

-

-   if (!Parse_String(parseState, ","))

-      RETURN_ERROR1("Expected comma in vector constant");

-

-   if (!Parse_ScalarConstant(parseState, vec+3))  /* W */

-      return GL_FALSE;

-

-   if (!Parse_String(parseState, "}"))

-      RETURN_ERROR1("Expected closing brace in vector constant");

-

-   return GL_TRUE;

-}

-

-

-/**

- * Parse <number>, <varname> or {a, b, c, d}.

- * Return number of values in the vector or scalar, or zero if parse error.

- */

-static GLuint

-Parse_VectorOrScalarConstant(struct parse_state *parseState, GLfloat *vec)

-{

-   if (Parse_String(parseState, "{")) {

-      return Parse_VectorConstant(parseState, vec);

-   }

-   else {

-      GLboolean b = Parse_ScalarConstant(parseState, vec);

-      if (b) {

-         vec[1] = vec[2] = vec[3] = vec[0];

-      }

-      return b;

-   }

-}

-

-

-/**

- * Parse a texture image source:

- *    [TEX0 | TEX1 | .. | TEX15] , [1D | 2D | 3D | CUBE | RECT]

- */

-static GLboolean

-Parse_TextureImageId(struct parse_state *parseState,

-                     GLubyte *texUnit, GLubyte *texTargetBit)

-{

-   GLubyte imageSrc[100];

-   GLint unit;

-

-   if (!Parse_Token(parseState, imageSrc))

-      RETURN_ERROR;

-   

-   if (imageSrc[0] != 'T' ||

-       imageSrc[1] != 'E' ||

-       imageSrc[2] != 'X') {

-      RETURN_ERROR1("Expected TEX# source");

-   }

-   unit = atoi((const char *) imageSrc + 3);

-   if ((unit < 0 || unit > MAX_TEXTURE_IMAGE_UNITS) ||

-       (unit == 0 && (imageSrc[3] != '0' || imageSrc[4] != 0))) {

-      RETURN_ERROR1("Invalied TEX# source index");

-   }

-   *texUnit = unit;

-

-   if (!Parse_String(parseState, ","))

-      RETURN_ERROR1("Expected ,");

-

-   if (Parse_String(parseState, "1D")) {

-      *texTargetBit = TEXTURE_1D_BIT;

-   }

-   else if (Parse_String(parseState, "2D")) {

-      *texTargetBit = TEXTURE_2D_BIT;

-   }

-   else if (Parse_String(parseState, "3D")) {

-      *texTargetBit = TEXTURE_3D_BIT;

-   }

-   else if (Parse_String(parseState, "CUBE")) {

-      *texTargetBit = TEXTURE_CUBE_BIT;

-   }

-   else if (Parse_String(parseState, "RECT")) {

-      *texTargetBit = TEXTURE_RECT_BIT;

-   }

-   else {

-      RETURN_ERROR1("Invalid texture target token");

-   }

-

-   /* update record of referenced texture units */

-   parseState->texturesUsed[*texUnit] |= *texTargetBit;

-   if (_mesa_bitcount(parseState->texturesUsed[*texUnit]) > 1) {

-      RETURN_ERROR1("Only one texture target can be used per texture unit.");

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Parse a scalar suffix like .x, .y, .z or .w or parse a swizzle suffix

- * like .wxyz, .xxyy, etc and return the swizzle indexes.

- */

-static GLboolean

-Parse_SwizzleSuffix(const GLubyte *token, GLuint swizzle[4])

-{

-   if (token[1] == 0) {

-      /* single letter swizzle (scalar) */

-      if (token[0] == 'x')

-         ASSIGN_4V(swizzle, 0, 0, 0, 0);

-      else if (token[0] == 'y')

-         ASSIGN_4V(swizzle, 1, 1, 1, 1);

-      else if (token[0] == 'z')

-         ASSIGN_4V(swizzle, 2, 2, 2, 2);

-      else if (token[0] == 'w')

-         ASSIGN_4V(swizzle, 3, 3, 3, 3);

-      else

-         return GL_FALSE;

-   }

-   else {

-      /* 4-component swizzle (vector) */

-      GLint k;

-      for (k = 0; k < 4 && token[k]; k++) {

-         if (token[k] == 'x')

-            swizzle[k] = 0;

-         else if (token[k] == 'y')

-            swizzle[k] = 1;

-         else if (token[k] == 'z')

-            swizzle[k] = 2;

-         else if (token[k] == 'w')

-            swizzle[k] = 3;

-         else

-            return GL_FALSE;

-      }

-      if (k != 4)

-         return GL_FALSE;

-   }

-   return GL_TRUE;

-}

-

-

-static GLboolean

-Parse_CondCodeMask(struct parse_state *parseState,

-                   struct prog_dst_register *dstReg)

-{

-   if (Parse_String(parseState, "EQ"))

-      dstReg->CondMask = COND_EQ;

-   else if (Parse_String(parseState, "GE"))

-      dstReg->CondMask = COND_GE;

-   else if (Parse_String(parseState, "GT"))

-      dstReg->CondMask = COND_GT;

-   else if (Parse_String(parseState, "LE"))

-      dstReg->CondMask = COND_LE;

-   else if (Parse_String(parseState, "LT"))

-      dstReg->CondMask = COND_LT;

-   else if (Parse_String(parseState, "NE"))

-      dstReg->CondMask = COND_NE;

-   else if (Parse_String(parseState, "TR"))

-      dstReg->CondMask = COND_TR;

-   else if (Parse_String(parseState, "FL"))

-      dstReg->CondMask = COND_FL;

-   else

-      RETURN_ERROR1("Invalid condition code mask");

-

-   /* look for optional .xyzw swizzle */

-   if (Parse_String(parseState, ".")) {

-      GLubyte token[100];

-      GLuint swz[4];

-

-      if (!Parse_Token(parseState, token))  /* get xyzw suffix */

-         RETURN_ERROR;

-

-      if (!Parse_SwizzleSuffix(token, swz))

-         RETURN_ERROR1("Invalid swizzle suffix");

-

-      dstReg->CondSwizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Parse a temporary register: Rnn or Hnn

- */

-static GLboolean

-Parse_TempReg(struct parse_state *parseState, GLint *tempRegNum)

-{

-   GLubyte token[100];

-

-   /* Should be 'R##' or 'H##' */

-   if (!Parse_Token(parseState, token))

-      RETURN_ERROR;

-   if (token[0] != 'R' && token[0] != 'H')

-      RETURN_ERROR1("Expected R## or H##");

-

-   if (IsDigit(token[1])) {

-      GLint reg = atoi((const char *) (token + 1));

-      if (token[0] == 'H')

-         reg += 32;

-      if (reg >= MAX_NV_FRAGMENT_PROGRAM_TEMPS)

-         RETURN_ERROR1("Invalid temporary register name");

-      *tempRegNum = reg;

-   }

-   else {

-      RETURN_ERROR1("Invalid temporary register name");

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Parse a write-only dummy register: RC or HC.

- */

-static GLboolean

-Parse_DummyReg(struct parse_state *parseState, GLint *regNum)

-{

-   if (Parse_String(parseState, "RC")) {

-       *regNum = 0;

-   }

-   else if (Parse_String(parseState, "HC")) {

-       *regNum = 1;

-   }

-   else {

-      RETURN_ERROR1("Invalid write-only register name");

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Parse a program local parameter register "p[##]"

- */

-static GLboolean

-Parse_ProgramParamReg(struct parse_state *parseState, GLint *regNum)

-{

-   GLubyte token[100];

-

-   if (!Parse_String(parseState, "p["))

-      RETURN_ERROR1("Expected p[");

-

-   if (!Parse_Token(parseState, token))

-      RETURN_ERROR;

-

-   if (IsDigit(token[0])) {

-      /* a numbered program parameter register */

-      GLint reg = atoi((const char *) token);

-      if (reg >= MAX_NV_FRAGMENT_PROGRAM_PARAMS)

-         RETURN_ERROR1("Invalid constant program number");

-      *regNum = reg;

-   }

-   else {

-      RETURN_ERROR;

-   }

-

-   if (!Parse_String(parseState, "]"))

-      RETURN_ERROR1("Expected ]");

-

-   return GL_TRUE;

-}

-

-

-/**

- * Parse f[name]  - fragment input register

- */

-static GLboolean

-Parse_FragReg(struct parse_state *parseState, GLint *tempRegNum)

-{

-   GLubyte token[100];

-   GLint j;

-

-   /* Match 'f[' */

-   if (!Parse_String(parseState, "f["))

-      RETURN_ERROR1("Expected f[");

-

-   /* get <name> and look for match */

-   if (!Parse_Token(parseState, token)) {

-      RETURN_ERROR;

-   }

-   for (j = 0; InputRegisters[j]; j++) {

-      if (strcmp((const char *) token, InputRegisters[j]) == 0) {

-         *tempRegNum = j;

-         parseState->inputsRead |= (1 << j);

-         break;

-      }

-   }

-   if (!InputRegisters[j]) {

-      /* unknown input register label */

-      RETURN_ERROR2("Invalid register name", token);

-   }

-

-   /* Match '[' */

-   if (!Parse_String(parseState, "]"))

-      RETURN_ERROR1("Expected ]");

-

-   return GL_TRUE;

-}

-

-

-static GLboolean

-Parse_OutputReg(struct parse_state *parseState, GLint *outputRegNum)

-{

-   GLubyte token[100];

-

-   /* Match "o[" */

-   if (!Parse_String(parseState, "o["))

-      RETURN_ERROR1("Expected o[");

-

-   /* Get output reg name */

-   if (!Parse_Token(parseState, token))

-      RETURN_ERROR;

-

-   /* try to match an output register name */

-   if (strcmp((char *) token, "COLR") == 0 ||

-       strcmp((char *) token, "COLH") == 0) {

-      /* note that we don't distinguish between COLR and COLH */

-      *outputRegNum = FRAG_RESULT_COLOR;

-      parseState->outputsWritten |= (1 << FRAG_RESULT_COLOR);

-   }

-   else if (strcmp((char *) token, "DEPR") == 0) {

-      *outputRegNum = FRAG_RESULT_DEPTH;

-      parseState->outputsWritten |= (1 << FRAG_RESULT_DEPTH);

-   }

-   else {

-      RETURN_ERROR1("Invalid output register name");

-   }

-

-   /* Match ']' */

-   if (!Parse_String(parseState, "]"))

-      RETURN_ERROR1("Expected ]");

-

-   return GL_TRUE;

-}

-

-

-static GLboolean

-Parse_MaskedDstReg(struct parse_state *parseState,

-                   struct prog_dst_register *dstReg)

-{

-   GLubyte token[100];

-   GLint idx;

-

-   /* Dst reg can be R<n>, H<n>, o[n], RC or HC */

-   if (!Peek_Token(parseState, token))

-      RETURN_ERROR;

-

-   if (strcmp((const char *) token, "RC") == 0 ||

-       strcmp((const char *) token, "HC") == 0) {

-      /* a write-only register */

-      dstReg->File = PROGRAM_WRITE_ONLY;

-      if (!Parse_DummyReg(parseState, &idx))

-         RETURN_ERROR;

-      dstReg->Index = idx;

-   }

-   else if (token[0] == 'R' || token[0] == 'H') {

-      /* a temporary register */

-      dstReg->File = PROGRAM_TEMPORARY;

-      if (!Parse_TempReg(parseState, &idx))

-         RETURN_ERROR;

-      dstReg->Index = idx;

-   }

-   else if (token[0] == 'o') {

-      /* an output register */

-      dstReg->File = PROGRAM_OUTPUT;

-      if (!Parse_OutputReg(parseState, &idx))

-         RETURN_ERROR;

-      dstReg->Index = idx;

-   }

-   else {

-      RETURN_ERROR1("Invalid destination register name");

-   }

-

-   /* Parse optional write mask */

-   if (Parse_String(parseState, ".")) {

-      /* got a mask */

-      GLint k = 0;

-

-      if (!Parse_Token(parseState, token))  /* get xyzw writemask */

-         RETURN_ERROR;

-

-      dstReg->WriteMask = 0;

-

-      if (token[k] == 'x') {

-         dstReg->WriteMask |= WRITEMASK_X;

-         k++;

-      }

-      if (token[k] == 'y') {

-         dstReg->WriteMask |= WRITEMASK_Y;

-         k++;

-      }

-      if (token[k] == 'z') {

-         dstReg->WriteMask |= WRITEMASK_Z;

-         k++;

-      }

-      if (token[k] == 'w') {

-         dstReg->WriteMask |= WRITEMASK_W;

-         k++;

-      }

-      if (k == 0) {

-         RETURN_ERROR1("Invalid writemask character");

-      }

-

-   }

-   else {

-      dstReg->WriteMask = WRITEMASK_XYZW;

-   }

-

-   /* optional condition code mask */

-   if (Parse_String(parseState, "(")) {

-      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".x|y|z|w) */

-      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".[xyzw]) */

-      if (!Parse_CondCodeMask(parseState, dstReg))

-         RETURN_ERROR;

-

-      if (!Parse_String(parseState, ")"))  /* consume ")" */

-         RETURN_ERROR1("Expected )");

-

-      return GL_TRUE;

-   }

-   else {

-      /* no cond code mask */

-      dstReg->CondMask = COND_TR;

-      dstReg->CondSwizzle = SWIZZLE_NOOP;

-      return GL_TRUE;

-   }

-}

-

-

-/**

- * Parse a vector source (register, constant, etc):

- *   <vectorSrc>    ::= <absVectorSrc>

- *                    | <baseVectorSrc>

- *   <absVectorSrc> ::= <negate> "|" <baseVectorSrc> "|"

- */

-static GLboolean

-Parse_VectorSrc(struct parse_state *parseState,

-                struct prog_src_register *srcReg)

-{

-   GLfloat sign = 1.0F;

-   GLubyte token[100];

-   GLint idx;

-   GLuint negateBase, negateAbs;

-

-   /*

-    * First, take care of +/- and absolute value stuff.

-    */

-   if (Parse_String(parseState, "-"))

-      sign = -1.0F;

-   else if (Parse_String(parseState, "+"))

-      sign = +1.0F;

-

-   if (Parse_String(parseState, "|")) {

-      srcReg->Abs = GL_TRUE;

-      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

-

-      if (Parse_String(parseState, "-"))

-         negateBase = NEGATE_XYZW;

-      else if (Parse_String(parseState, "+"))

-         negateBase = NEGATE_NONE;

-      else

-         negateBase = NEGATE_NONE;

-   }

-   else {

-      srcReg->Abs = GL_FALSE;

-      negateAbs = NEGATE_NONE;

-      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

-   }

-

-   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;

-

-   /* This should be the real src vector/register name */

-   if (!Peek_Token(parseState, token))

-      RETURN_ERROR;

-

-   /* Src reg can be Rn, Hn, f[n], p[n], a named parameter, a scalar

-    * literal or vector literal.

-    */

-   if (token[0] == 'R' || token[0] == 'H') {

-      srcReg->File = PROGRAM_TEMPORARY;

-      if (!Parse_TempReg(parseState, &idx))

-         RETURN_ERROR;

-      srcReg->Index = idx;

-   }

-   else if (token[0] == 'f') {

-      /* XXX this might be an identifier! */

-      srcReg->File = PROGRAM_INPUT;

-      if (!Parse_FragReg(parseState, &idx))

-         RETURN_ERROR;

-      srcReg->Index = idx;

-   }

-   else if (token[0] == 'p') {

-      /* XXX this might be an identifier! */

-      srcReg->File = PROGRAM_LOCAL_PARAM;

-      if (!Parse_ProgramParamReg(parseState, &idx))

-         RETURN_ERROR;

-      srcReg->Index = idx;

-   }

-   else if (IsLetter(token[0])){

-      GLubyte ident[100];

-      GLint paramIndex;

-      if (!Parse_Identifier(parseState, ident))

-         RETURN_ERROR;

-      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,

-                                                -1, (const char *) ident);

-      if (paramIndex < 0) {

-         RETURN_ERROR2("Undefined constant or parameter: ", ident);

-      }

-      srcReg->File = PROGRAM_NAMED_PARAM;

-      srcReg->Index = paramIndex;      

-   }

-   else if (IsDigit(token[0]) || token[0] == '-' || token[0] == '+' || token[0] == '.'){

-      /* literal scalar constant */

-      GLfloat values[4];

-      GLuint paramIndex;

-      if (!Parse_ScalarConstant(parseState, values))

-         RETURN_ERROR;

-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

-                                              values, 4, NULL);

-      srcReg->File = PROGRAM_NAMED_PARAM;

-      srcReg->Index = paramIndex;

-   }

-   else if (token[0] == '{'){

-      /* literal vector constant */

-      GLfloat values[4];

-      GLuint paramIndex;

-      (void) Parse_String(parseState, "{");

-      if (!Parse_VectorConstant(parseState, values))

-         RETURN_ERROR;

-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

-                                              values, 4, NULL);

-      srcReg->File = PROGRAM_NAMED_PARAM;

-      srcReg->Index = paramIndex;      

-   }

-   else {

-      RETURN_ERROR2("Invalid source register name", token);

-   }

-

-   /* init swizzle fields */

-   srcReg->Swizzle = SWIZZLE_NOOP;

-

-   /* Look for optional swizzle suffix */

-   if (Parse_String(parseState, ".")) {

-      GLuint swz[4];

-

-      if (!Parse_Token(parseState, token))

-         RETURN_ERROR;

-

-      if (!Parse_SwizzleSuffix(token, swz))

-         RETURN_ERROR1("Invalid swizzle suffix");

-

-      srcReg->Swizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);

-   }

-

-   /* Finish absolute value */

-   if (srcReg->Abs && !Parse_String(parseState, "|")) {

-      RETURN_ERROR1("Expected |");

-   }

-

-   return GL_TRUE;

-}

-

-

-static GLboolean

-Parse_ScalarSrcReg(struct parse_state *parseState,

-                   struct prog_src_register *srcReg)

-{

-   GLubyte token[100];

-   GLfloat sign = 1.0F;

-   GLboolean needSuffix = GL_TRUE;

-   GLint idx;

-   GLuint negateBase, negateAbs;

-

-   /*

-    * First, take care of +/- and absolute value stuff.

-    */

-   if (Parse_String(parseState, "-"))

-      sign = -1.0F;

-   else if (Parse_String(parseState, "+"))

-      sign = +1.0F;

-

-   if (Parse_String(parseState, "|")) {

-      srcReg->Abs = GL_TRUE;

-      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

-

-      if (Parse_String(parseState, "-"))

-         negateBase = NEGATE_XYZW;

-      else if (Parse_String(parseState, "+"))

-         negateBase = NEGATE_NONE;

-      else

-         negateBase = NEGATE_NONE;

-   }

-   else {

-      srcReg->Abs = GL_FALSE;

-      negateAbs = NEGATE_NONE;

-      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

-   }

-

-   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;

-

-   if (!Peek_Token(parseState, token))

-      RETURN_ERROR;

-

-   /* Src reg can be R<n>, H<n> or a named fragment attrib */

-   if (token[0] == 'R' || token[0] == 'H') {

-      srcReg->File = PROGRAM_TEMPORARY;

-      if (!Parse_TempReg(parseState, &idx))

-         RETURN_ERROR;

-      srcReg->Index = idx;

-   }

-   else if (token[0] == 'f') {

-      srcReg->File = PROGRAM_INPUT;

-      if (!Parse_FragReg(parseState, &idx))

-         RETURN_ERROR;

-      srcReg->Index = idx;

-   }

-   else if (token[0] == '{') {

-      /* vector literal */

-      GLfloat values[4];

-      GLuint paramIndex;

-      (void) Parse_String(parseState, "{");

-      if (!Parse_VectorConstant(parseState, values))

-         RETURN_ERROR;

-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

-                                              values, 4, NULL);

-      srcReg->File = PROGRAM_NAMED_PARAM;

-      srcReg->Index = paramIndex;      

-   }

-   else if (IsLetter(token[0])){

-      /* named param/constant */

-      GLubyte ident[100];

-      GLint paramIndex;

-      if (!Parse_Identifier(parseState, ident))

-         RETURN_ERROR;

-      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,

-                                                -1, (const char *) ident);

-      if (paramIndex < 0) {

-         RETURN_ERROR2("Undefined constant or parameter: ", ident);

-      }

-      srcReg->File = PROGRAM_NAMED_PARAM;

-      srcReg->Index = paramIndex;      

-   }

-   else if (IsDigit(token[0])) {

-      /* scalar literal */

-      GLfloat values[4];

-      GLuint paramIndex;

-      if (!Parse_ScalarConstant(parseState, values))

-         RETURN_ERROR;

-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

-                                              values, 4, NULL);

-      srcReg->Index = paramIndex;      

-      srcReg->File = PROGRAM_NAMED_PARAM;

-      needSuffix = GL_FALSE;

-   }

-   else {

-      RETURN_ERROR2("Invalid scalar source argument", token);

-   }

-

-   srcReg->Swizzle = 0;

-   if (needSuffix) {

-      /* parse .[xyzw] suffix */

-      if (!Parse_String(parseState, "."))

-         RETURN_ERROR1("Expected .");

-

-      if (!Parse_Token(parseState, token))

-         RETURN_ERROR;

-

-      if (token[0] == 'x' && token[1] == 0) {

-         srcReg->Swizzle = 0;

-      }

-      else if (token[0] == 'y' && token[1] == 0) {

-         srcReg->Swizzle = 1;

-      }

-      else if (token[0] == 'z' && token[1] == 0) {

-         srcReg->Swizzle = 2;

-      }

-      else if (token[0] == 'w' && token[1] == 0) {

-         srcReg->Swizzle = 3;

-      }

-      else {

-         RETURN_ERROR1("Invalid scalar source suffix");

-      }

-   }

-

-   /* Finish absolute value */

-   if (srcReg->Abs && !Parse_String(parseState, "|")) {

-      RETURN_ERROR1("Expected |");

-   }

-

-   return GL_TRUE;

-}

-

-

-static GLboolean

-Parse_PrintInstruction(struct parse_state *parseState,

-                       struct prog_instruction *inst)

-{

-   const GLubyte *str;

-   GLubyte *msg;

-   GLuint len;

-   GLint idx;

-

-   /* The first argument is a literal string 'just like this' */

-   if (!Parse_String(parseState, "'"))

-      RETURN_ERROR1("Expected '");

-

-   str = parseState->pos;

-   for (len = 0; str[len] != '\''; len++) /* find closing quote */

-      ;

-   parseState->pos += len + 1;

-   msg = (GLubyte*) malloc(len + 1);

-

-   memcpy(msg, str, len);

-   msg[len] = 0;

-   inst->Data = msg;

-

-   if (Parse_String(parseState, ",")) {

-      /* got an optional register to print */

-      GLubyte token[100];

-      GetToken(parseState, token);

-      if (token[0] == 'o') {

-         /* dst reg */

-         if (!Parse_OutputReg(parseState, &idx))

-            RETURN_ERROR;

-	 inst->SrcReg[0].Index = idx;

-         inst->SrcReg[0].File = PROGRAM_OUTPUT;

-      }

-      else {

-         /* src reg */

-         if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

-            RETURN_ERROR;

-      }

-   }

-   else {

-      inst->SrcReg[0].File = PROGRAM_UNDEFINED;

-   }

-

-   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;

-   inst->SrcReg[0].Abs = GL_FALSE;

-   inst->SrcReg[0].Negate = NEGATE_NONE;

-

-   return GL_TRUE;

-}

-

-

-static GLboolean

-Parse_InstructionSequence(struct parse_state *parseState,

-                          struct prog_instruction program[])

-{

-   while (1) {

-      struct prog_instruction *inst = program + parseState->numInst;

-      struct instruction_pattern instMatch;

-      GLubyte token[100];

-

-      /* Initialize the instruction */

-      _mesa_init_instructions(inst, 1);

-

-      /* special instructions */

-      if (Parse_String(parseState, "DEFINE")) {

-         GLubyte id[100];

-         GLfloat value[7];  /* yes, 7 to be safe */

-         if (!Parse_Identifier(parseState, id))

-            RETURN_ERROR;

-         /* XXX make sure id is not a reserved identifer, like R9 */

-         if (!Parse_String(parseState, "="))

-            RETURN_ERROR1("Expected =");

-         if (!Parse_VectorOrScalarConstant(parseState, value))

-            RETURN_ERROR;

-         if (!Parse_String(parseState, ";"))

-            RETURN_ERROR1("Expected ;");

-         if (_mesa_lookup_parameter_index(parseState->parameters,

-                                          -1, (const char *) id) >= 0) {

-            RETURN_ERROR2(id, "already defined");

-         }

-         _mesa_add_named_parameter(parseState->parameters,

-                                   (const char *) id, value);

-      }

-      else if (Parse_String(parseState, "DECLARE")) {

-         GLubyte id[100];

-         GLfloat value[7] = {0, 0, 0, 0, 0, 0, 0};  /* yes, to be safe */

-         if (!Parse_Identifier(parseState, id))

-            RETURN_ERROR;

-         /* XXX make sure id is not a reserved identifer, like R9 */

-         if (Parse_String(parseState, "=")) {

-            if (!Parse_VectorOrScalarConstant(parseState, value))

-               RETURN_ERROR;

-         }

-         if (!Parse_String(parseState, ";"))

-            RETURN_ERROR1("Expected ;");

-         if (_mesa_lookup_parameter_index(parseState->parameters,

-                                          -1, (const char *) id) >= 0) {

-            RETURN_ERROR2(id, "already declared");

-         }

-         _mesa_add_named_parameter(parseState->parameters,

-                                   (const char *) id, value);

-      }

-      else if (Parse_String(parseState, "END")) {

-         inst->Opcode = OPCODE_END;

-         parseState->numInst++;

-         if (Parse_Token(parseState, token)) {

-            RETURN_ERROR1("Code after END opcode.");

-         }

-         break;

-      }

-      else {

-         /* general/arithmetic instruction */

-

-         /* get token */

-         if (!Parse_Token(parseState, token)) {

-            RETURN_ERROR1("Missing END instruction.");

-         }

-

-         /* try to find matching instuction */

-         instMatch = MatchInstruction(token);

-         if (instMatch.opcode >= MAX_OPCODE) {

-            /* bad instruction name */

-            RETURN_ERROR2("Unexpected token: ", token);

-         }

-

-         inst->Opcode = instMatch.opcode;

-         inst->Precision = instMatch.suffixes & (_R | _H | _X);

-         inst->SaturateMode = (instMatch.suffixes & (_S))

-            ? SATURATE_ZERO_ONE : SATURATE_OFF;

-         inst->CondUpdate = (instMatch.suffixes & (_C)) ? GL_TRUE : GL_FALSE;

-

-         /*

-          * parse the input and output operands

-          */

-         if (instMatch.outputs == OUTPUT_S || instMatch.outputs == OUTPUT_V) {

-            if (!Parse_MaskedDstReg(parseState, &inst->DstReg))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-         }

-         else if (instMatch.outputs == OUTPUT_NONE) {

-            if (instMatch.opcode == OPCODE_KIL_NV) {

-               /* This is a little weird, the cond code info is in

-                * the dest register.

-                */

-               if (!Parse_CondCodeMask(parseState, &inst->DstReg))

-                  RETURN_ERROR;

-            }

-            else {

-               ASSERT(instMatch.opcode == OPCODE_PRINT);

-            }

-         }

-

-         if (instMatch.inputs == INPUT_1V) {

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-         }

-         else if (instMatch.inputs == INPUT_2V) {

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))

-               RETURN_ERROR;

-         }

-         else if (instMatch.inputs == INPUT_3V) {

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))

-               RETURN_ERROR;

-         }

-         else if (instMatch.inputs == INPUT_1S) {

-            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-         }

-         else if (instMatch.inputs == INPUT_2S) {

-            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[1]))

-               RETURN_ERROR;

-         }

-         else if (instMatch.inputs == INPUT_CC) {

-            /* XXX to-do */

-         }

-         else if (instMatch.inputs == INPUT_1V_T) {

-	    GLubyte unit, idx;

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_TextureImageId(parseState, &unit, &idx))

-               RETURN_ERROR;

-	    inst->TexSrcUnit = unit;

-	    inst->TexSrcTarget = idx;

-         }

-         else if (instMatch.inputs == INPUT_3V_T) {

-	    GLubyte unit, idx;

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))

-               RETURN_ERROR;

-            if (!Parse_String(parseState, ","))

-               RETURN_ERROR1("Expected ,");

-            if (!Parse_TextureImageId(parseState, &unit, &idx))

-               RETURN_ERROR;

-	    inst->TexSrcUnit = unit;

-	    inst->TexSrcTarget = idx;

-         }

-         else if (instMatch.inputs == INPUT_1V_S) {

-            if (!Parse_PrintInstruction(parseState, inst))

-               RETURN_ERROR;

-         }

-

-         /* end of statement semicolon */

-         if (!Parse_String(parseState, ";"))

-            RETURN_ERROR1("Expected ;");

-

-         parseState->numInst++;

-

-         if (parseState->numInst >= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS)

-            RETURN_ERROR1("Program too long");

-      }

-   }

-   return GL_TRUE;

-}

-

-

-

-/**

- * 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_fragment_program(struct gl_context *ctx, GLenum dstTarget,

-                                const GLubyte *str, GLsizei len,

-                                struct gl_fragment_program *program)

-{

-   struct parse_state parseState;

-   struct prog_instruction instBuffer[MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS];

-   struct prog_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;

-

-   /* Get ready to parse */

-   memset(&parseState, 0, sizeof(struct parse_state));

-   parseState.ctx = ctx;

-   parseState.start = programString;

-   parseState.program = program;

-   parseState.numInst = 0;

-   parseState.curLine = programString;

-   parseState.parameters = _mesa_new_parameter_list();

-

-   /* Reset error state */

-   _mesa_set_program_error(ctx, -1, NULL);

-

-   /* check the program header */

-   if (strncmp((const char *) programString, "!!FP1.0", 7) == 0) {

-      target = GL_FRAGMENT_PROGRAM_NV;

-      parseState.pos = programString + 7;

-   }

-   else if (strncmp((const char *) programString, "!!FCP1.0", 8) == 0) {

-      /* fragment / register combiner program - not supported */

-      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");

-      return;

-   }

-   else {

-      /* invalid header */

-      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");

-      _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 0x%x != 0x%x)",

-                  target, dstTarget);

-      return;

-   }

-

-   if (Parse_InstructionSequence(&parseState, instBuffer)) {

-      GLuint u;

-      /* successful parse! */

-

-      if (parseState.outputsWritten == 0) {

-         /* must write at least one output! */

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "Invalid fragment program - no outputs written.");

-         return;

-      }

-

-      /* copy the compiled instructions */

-      assert(parseState.numInst <= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS);

-      newInst = _mesa_alloc_instructions(parseState.numInst);

-      if (!newInst) {

-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");

-         return;  /* out of memory */

-      }

-      _mesa_copy_instructions(newInst, instBuffer, parseState.numInst);

-

-      /* install the program */

-      program->Base.Target = target;

-      if (program->Base.String) {

-         FREE(program->Base.String);

-      }

-      program->Base.String = programString;

-      program->Base.Format = GL_PROGRAM_FORMAT_ASCII_ARB;

-      if (program->Base.Instructions) {

-         free(program->Base.Instructions);

-      }

-      program->Base.Instructions = newInst;

-      program->Base.NumInstructions = parseState.numInst;

-      program->Base.InputsRead = parseState.inputsRead;

-      program->Base.OutputsWritten = parseState.outputsWritten;

-      for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++)

-         program->Base.TexturesUsed[u] = parseState.texturesUsed[u];

-

-      /* save program parameters */

-      program->Base.Parameters = parseState.parameters;

-

-      /* allocate registers for declared program parameters */

-#if 00

-      _mesa_assign_program_registers(&(program->SymbolTable));

-#endif

-

-#ifdef DEBUG_foo

-      printf("--- glLoadProgramNV(%d) result ---\n", program->Base.Id);

-      _mesa_fprint_program_opt(stdout, &program->Base, PROG_PRINT_NV, 0);

-      printf("----------------------------------\n");

-#endif

-   }

-   else {

-      /* Error! */

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV");

-      /* NOTE: _mesa_set_program_error would have been called already */

-   }

-}

-

-

-const char *

-_mesa_nv_fragment_input_register_name(GLuint i)

-{

-   ASSERT(i < MAX_NV_FRAGMENT_PROGRAM_INPUTS);

-   return InputRegisters[i];

-}

-

+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 1999-2005  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 nvfragparse.c
+ * NVIDIA fragment program parser.
+ * \author Brian Paul
+ */
+
+/*
+ * Regarding GL_NV_fragment_program:
+ *
+ * Portions of this software may use or implement intellectual
+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
+ * any and all warranties with respect to such intellectual property,
+ * including any use thereof or modifications thereto.
+ */
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "program.h"
+#include "prog_parameter.h"
+#include "prog_print.h"
+#include "prog_instruction.h"
+#include "nvfragparse.h"
+
+
+#define INPUT_1V     1
+#define INPUT_2V     2
+#define INPUT_3V     3
+#define INPUT_1S     4
+#define INPUT_2S     5
+#define INPUT_CC     6
+#define INPUT_1V_T   7  /* one source vector, plus textureId */
+#define INPUT_3V_T   8  /* one source vector, plus textureId */
+#define INPUT_NONE   9
+#define INPUT_1V_S  10  /* a string and a vector register */
+#define OUTPUT_V    20
+#define OUTPUT_S    21
+#define OUTPUT_NONE 22
+
+/* IRIX defines some of these */
+#undef _R
+#undef _H
+#undef _X
+#undef _C
+#undef _S
+
+/* Optional suffixes */
+#define _R  FLOAT32  /* float */
+#define _H  FLOAT16  /* half-float */
+#define _X  FIXED12  /* fixed */
+#define _C  0x08     /* set cond codes */
+#define _S  0x10     /* saturate, clamp result to [0,1] */
+
+struct instruction_pattern {
+   const char *name;
+   enum prog_opcode opcode;
+   GLuint inputs;
+   GLuint outputs;
+   GLuint suffixes;
+};
+
+static const struct instruction_pattern Instructions[] = {
+   { "ADD", OPCODE_ADD, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "COS", OPCODE_COS, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
+   { "DDX", OPCODE_DDX, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },
+   { "DDY", OPCODE_DDY, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },
+   { "DP3", OPCODE_DP3, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },
+   { "DP4", OPCODE_DP4, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },
+   { "DST", OPCODE_DP4, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },
+   { "EX2", OPCODE_DP4, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
+   { "FLR", OPCODE_FLR, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "FRC", OPCODE_FRC, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "KIL", OPCODE_KIL_NV, INPUT_CC, OUTPUT_NONE, 0                },
+   { "LG2", OPCODE_LG2, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
+   { "LIT", OPCODE_LIT, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },
+   { "LRP", OPCODE_LRP, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "MAD", OPCODE_MAD, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "MAX", OPCODE_MAX, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "MIN", OPCODE_MIN, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "MOV", OPCODE_MOV, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "MUL", OPCODE_MUL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "PK2H",  OPCODE_PK2H,  INPUT_1V, OUTPUT_S, 0                  },
+   { "PK2US", OPCODE_PK2US, INPUT_1V, OUTPUT_S, 0                  },
+   { "PK4B",  OPCODE_PK4B,  INPUT_1V, OUTPUT_S, 0                  },
+   { "PK4UB", OPCODE_PK4UB, INPUT_1V, OUTPUT_S, 0                  },
+   { "POW", OPCODE_POW, INPUT_2S, OUTPUT_S, _R | _H |      _C | _S },
+   { "RCP", OPCODE_RCP, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
+   { "RFL", OPCODE_RFL, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },
+   { "RSQ", OPCODE_RSQ, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
+   { "SEQ", OPCODE_SEQ, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SFL", OPCODE_SFL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SGE", OPCODE_SGE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SGT", OPCODE_SGT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SIN", OPCODE_SIN, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
+   { "SLE", OPCODE_SLE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SLT", OPCODE_SLT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SNE", OPCODE_SNE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "STR", OPCODE_STR, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "SUB", OPCODE_SUB, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
+   { "TEX", OPCODE_TEX, INPUT_1V_T, OUTPUT_V,              _C | _S },
+   { "TXD", OPCODE_TXD, INPUT_3V_T, OUTPUT_V,              _C | _S },
+   { "TXP", OPCODE_TXP_NV, INPUT_1V_T, OUTPUT_V,           _C | _S },
+   { "UP2H",  OPCODE_UP2H,  INPUT_1S, OUTPUT_V,            _C | _S },
+   { "UP2US", OPCODE_UP2US, INPUT_1S, OUTPUT_V,            _C | _S },
+   { "UP4B",  OPCODE_UP4B,  INPUT_1S, OUTPUT_V,            _C | _S },
+   { "UP4UB", OPCODE_UP4UB, INPUT_1S, OUTPUT_V,            _C | _S },
+   { "X2D", OPCODE_X2D, INPUT_3V, OUTPUT_V, _R | _H |      _C | _S },
+   { "PRINT", OPCODE_PRINT, INPUT_1V_S, OUTPUT_NONE, 0               },
+   { NULL, (enum prog_opcode) -1, 0, 0, 0 }
+};
+
+
+/*
+ * Information needed or computed during parsing.
+ * Remember, we can't modify the target program object until we've
+ * _successfully_ parsed the program text.
+ */
+struct parse_state {
+   struct gl_context *ctx;
+   const GLubyte *start;              /* start of program string */
+   const GLubyte *pos;                /* current position */
+   const GLubyte *curLine;
+   struct gl_fragment_program *program;  /* current program */
+
+   struct gl_program_parameter_list *parameters;
+
+   GLuint numInst;                    /* number of instructions parsed */
+   GLuint inputsRead;                 /* bitmask of input registers used */
+   GLuint outputsWritten;             /* bitmask of 1 << FRAG_OUTPUT_* bits */
+   GLuint texturesUsed[MAX_TEXTURE_IMAGE_UNITS];
+};
+
+
+
+/*
+ * Called whenever we find an error during parsing.
+ */
+static void
+record_error(struct parse_state *parseState, const char *msg, int lineNo)
+{
+#ifdef DEBUG
+   GLint line, column;
+   const GLubyte *lineStr;
+   lineStr = _mesa_find_line_column(parseState->start,
+                                    parseState->pos, &line, &column);
+   _mesa_debug(parseState->ctx,
+               "nvfragparse.c(%d): line %d, column %d:%s (%s)\n",
+               lineNo, line, column, (char *) lineStr, msg);
+   free((void *) lineStr);
+#else
+   (void) lineNo;
+#endif
+
+   /* Check that no error was already recorded.  Only record the first one. */
+   if (parseState->ctx->Program.ErrorString[0] == 0) {
+      _mesa_set_program_error(parseState->ctx,
+                              parseState->pos - parseState->start,
+                              msg);
+   }
+}
+
+
+#define RETURN_ERROR							\
+do {									\
+   record_error(parseState, "Unexpected end of input.", __LINE__);	\
+   return GL_FALSE;							\
+} while(0)
+
+#define RETURN_ERROR1(msg)						\
+do {									\
+   record_error(parseState, msg, __LINE__);				\
+   return GL_FALSE;							\
+} while(0)
+
+#define RETURN_ERROR2(msg1, msg2)					\
+do {									\
+   char err[1000];							\
+   sprintf(err, "%s %s", msg1, msg2);				\
+   record_error(parseState, err, __LINE__);				\
+   return GL_FALSE;							\
+} while(0)
+
+
+
+
+/*
+ * Search a list of instruction structures for a match.
+ */
+static struct instruction_pattern
+MatchInstruction(const GLubyte *token)
+{
+   const struct instruction_pattern *inst;
+   struct instruction_pattern result;
+
+   result.name = NULL;
+   result.opcode = MAX_OPCODE; /* i.e. invalid instruction */
+   result.inputs = 0;
+   result.outputs = 0;
+   result.suffixes = 0;
+
+   for (inst = Instructions; inst->name; inst++) {
+      if (strncmp((const char *) token, inst->name, 3) == 0) {
+         /* matched! */
+         int i = 3;
+         result = *inst;
+         result.suffixes = 0;
+         /* look at suffix */
+         if (token[i] == 'R') {
+            result.suffixes |= _R;
+            i++;
+         }
+         else if (token[i] == 'H') {
+            result.suffixes |= _H;
+            i++;
+         }
+         else if (token[i] == 'X') {
+            result.suffixes |= _X;
+            i++;
+         }
+         if (token[i] == 'C') {
+            result.suffixes |= _C;
+            i++;
+         }
+         if (token[i] == '_' && token[i+1] == 'S' &&
+             token[i+2] == 'A' && token[i+3] == 'T') {
+            result.suffixes |= _S;
+         }
+         return result;
+      }
+   }
+
+   return result;
+}
+
+
+
+
+/**********************************************************************/
+
+
+static GLboolean IsLetter(GLubyte b)
+{
+   return (b >= 'a' && b <= 'z') ||
+          (b >= 'A' && b <= 'Z') ||
+          (b == '_') ||
+          (b == '$');
+}
+
+
+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(struct parse_state *parseState, GLubyte *token)
+{
+   const GLubyte *str = parseState->pos;
+   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++;
+         }
+         if (str[i] == '\n' || str[i] == '\r')
+            parseState->curLine = str + i + 1;
+      }
+      else {
+         /* skip whitespace */
+         if (str[i] == '\n' || str[i] == '\r')
+            parseState->curLine = str + i + 1;
+         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 character */
+   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(struct parse_state *parseState, GLubyte *token)
+{
+   GLint i;
+   i = GetToken(parseState, token);
+   if (i <= 0) {
+      parseState->pos += (-i);
+      return GL_FALSE;
+   }
+   parseState->pos += i;
+   return GL_TRUE;
+}
+
+
+/**
+ * Get next token from input stream but don't increment stream pointer.
+ */
+static GLboolean
+Peek_Token(struct parse_state *parseState, GLubyte *token)
+{
+   GLint i, len;
+   i = GetToken(parseState, token);
+   if (i <= 0) {
+      parseState->pos += (-i);
+      return GL_FALSE;
+   }
+   len = (GLint) strlen((const char *) token);
+   parseState->pos += (i - len);
+   return GL_TRUE;
+}
+
+
+/**********************************************************************/
+
+static const char *InputRegisters[MAX_NV_FRAGMENT_PROGRAM_INPUTS + 1] = {
+   "WPOS", "COL0", "COL1", "FOGC",
+   "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL
+};
+
+
+
+/**********************************************************************/
+
+/**
+ * Try to match 'pattern' as the next token after any whitespace/comments.
+ */
+static GLboolean
+Parse_String(struct parse_state *parseState, const char *pattern)
+{
+   const GLubyte *m;
+   GLint i;
+
+   /* skip whitespace and comments */
+   while (IsWhitespace(*parseState->pos) || *parseState->pos == '#') {
+      if (*parseState->pos == '#') {
+         while (*parseState->pos && (*parseState->pos != '\n' && *parseState->pos != '\r')) {
+            parseState->pos += 1;
+         }
+         if (*parseState->pos == '\n' || *parseState->pos == '\r')
+            parseState->curLine = parseState->pos + 1;
+      }
+      else {
+         /* skip whitespace */
+         if (*parseState->pos == '\n' || *parseState->pos == '\r')
+            parseState->curLine = parseState->pos + 1;
+         parseState->pos += 1;
+      }
+   }
+
+   /* Try to match the pattern */
+   m = parseState->pos;
+   for (i = 0; pattern[i]; i++) {
+      if (*m != (GLubyte) pattern[i])
+         return GL_FALSE;
+      m += 1;
+   }
+   parseState->pos = m;
+
+   return GL_TRUE; /* success */
+}
+
+
+static GLboolean
+Parse_Identifier(struct parse_state *parseState, GLubyte *ident)
+{
+   if (!Parse_Token(parseState, ident))
+      RETURN_ERROR;
+   if (IsLetter(ident[0]))
+      return GL_TRUE;
+   else
+      RETURN_ERROR1("Expected an identfier");
+}
+
+
+/**
+ * Parse a floating point constant, or a defined symbol name.
+ * [+/-]N[.N[eN]]
+ * Output:  number[0 .. 3] will get the value.
+ */
+static GLboolean
+Parse_ScalarConstant(struct parse_state *parseState, GLfloat *number)
+{
+   char *end = NULL;
+
+   *number = (GLfloat) _mesa_strtof((const char *) parseState->pos, &end);
+
+   if (end && end > (char *) parseState->pos) {
+      /* got a number */
+      parseState->pos = (GLubyte *) end;
+      number[1] = *number;
+      number[2] = *number;
+      number[3] = *number;
+      return GL_TRUE;
+   }
+   else {
+      /* should be an identifier */
+      GLubyte ident[100];
+      const GLfloat *constant;
+      if (!Parse_Identifier(parseState, ident))
+         RETURN_ERROR1("Expected an identifier");
+      constant = (GLfloat *)_mesa_lookup_parameter_value(parseState->parameters,
+                                                         -1, 
+                                                         (const char *) ident);
+      /* XXX Check that it's a constant and not a parameter */
+      if (!constant) {
+         RETURN_ERROR1("Undefined symbol");
+      }
+      else {
+         COPY_4V(number, constant);
+         return GL_TRUE;
+      }
+   }
+}
+
+
+
+/**
+ * Parse a vector constant, one of:
+ *   { float }
+ *   { float, float }
+ *   { float, float, float }
+ *   { float, float, float, float }
+ */
+static GLboolean
+Parse_VectorConstant(struct parse_state *parseState, GLfloat *vec)
+{
+   /* "{" was already consumed */
+
+   ASSIGN_4V(vec, 0.0, 0.0, 0.0, 1.0);
+
+   if (!Parse_ScalarConstant(parseState, vec+0))  /* X */
+      return GL_FALSE;
+
+   if (Parse_String(parseState, "}")) {
+      return GL_TRUE;
+   }
+
+   if (!Parse_String(parseState, ","))
+      RETURN_ERROR1("Expected comma in vector constant");
+
+   if (!Parse_ScalarConstant(parseState, vec+1))  /* Y */
+      return GL_FALSE;
+
+   if (Parse_String(parseState, "}")) {
+      return GL_TRUE;
+   }
+
+   if (!Parse_String(parseState, ","))
+      RETURN_ERROR1("Expected comma in vector constant");
+
+   if (!Parse_ScalarConstant(parseState, vec+2))  /* Z */
+      return GL_FALSE;
+
+   if (Parse_String(parseState, "}")) {
+      return GL_TRUE;
+   }
+
+   if (!Parse_String(parseState, ","))
+      RETURN_ERROR1("Expected comma in vector constant");
+
+   if (!Parse_ScalarConstant(parseState, vec+3))  /* W */
+      return GL_FALSE;
+
+   if (!Parse_String(parseState, "}"))
+      RETURN_ERROR1("Expected closing brace in vector constant");
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse <number>, <varname> or {a, b, c, d}.
+ * Return number of values in the vector or scalar, or zero if parse error.
+ */
+static GLuint
+Parse_VectorOrScalarConstant(struct parse_state *parseState, GLfloat *vec)
+{
+   if (Parse_String(parseState, "{")) {
+      return Parse_VectorConstant(parseState, vec);
+   }
+   else {
+      GLboolean b = Parse_ScalarConstant(parseState, vec);
+      if (b) {
+         vec[1] = vec[2] = vec[3] = vec[0];
+      }
+      return b;
+   }
+}
+
+
+/**
+ * Parse a texture image source:
+ *    [TEX0 | TEX1 | .. | TEX15] , [1D | 2D | 3D | CUBE | RECT]
+ */
+static GLboolean
+Parse_TextureImageId(struct parse_state *parseState,
+                     GLubyte *texUnit, GLubyte *texTargetBit)
+{
+   GLubyte imageSrc[100];
+   GLint unit;
+
+   if (!Parse_Token(parseState, imageSrc))
+      RETURN_ERROR;
+   
+   if (imageSrc[0] != 'T' ||
+       imageSrc[1] != 'E' ||
+       imageSrc[2] != 'X') {
+      RETURN_ERROR1("Expected TEX# source");
+   }
+   unit = atoi((const char *) imageSrc + 3);
+   if ((unit < 0 || unit > MAX_TEXTURE_IMAGE_UNITS) ||
+       (unit == 0 && (imageSrc[3] != '0' || imageSrc[4] != 0))) {
+      RETURN_ERROR1("Invalied TEX# source index");
+   }
+   *texUnit = unit;
+
+   if (!Parse_String(parseState, ","))
+      RETURN_ERROR1("Expected ,");
+
+   if (Parse_String(parseState, "1D")) {
+      *texTargetBit = TEXTURE_1D_BIT;
+   }
+   else if (Parse_String(parseState, "2D")) {
+      *texTargetBit = TEXTURE_2D_BIT;
+   }
+   else if (Parse_String(parseState, "3D")) {
+      *texTargetBit = TEXTURE_3D_BIT;
+   }
+   else if (Parse_String(parseState, "CUBE")) {
+      *texTargetBit = TEXTURE_CUBE_BIT;
+   }
+   else if (Parse_String(parseState, "RECT")) {
+      *texTargetBit = TEXTURE_RECT_BIT;
+   }
+   else {
+      RETURN_ERROR1("Invalid texture target token");
+   }
+
+   /* update record of referenced texture units */
+   parseState->texturesUsed[*texUnit] |= *texTargetBit;
+   if (_mesa_bitcount(parseState->texturesUsed[*texUnit]) > 1) {
+      RETURN_ERROR1("Only one texture target can be used per texture unit.");
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse a scalar suffix like .x, .y, .z or .w or parse a swizzle suffix
+ * like .wxyz, .xxyy, etc and return the swizzle indexes.
+ */
+static GLboolean
+Parse_SwizzleSuffix(const GLubyte *token, GLuint swizzle[4])
+{
+   if (token[1] == 0) {
+      /* single letter swizzle (scalar) */
+      if (token[0] == 'x')
+         ASSIGN_4V(swizzle, 0, 0, 0, 0);
+      else if (token[0] == 'y')
+         ASSIGN_4V(swizzle, 1, 1, 1, 1);
+      else if (token[0] == 'z')
+         ASSIGN_4V(swizzle, 2, 2, 2, 2);
+      else if (token[0] == 'w')
+         ASSIGN_4V(swizzle, 3, 3, 3, 3);
+      else
+         return GL_FALSE;
+   }
+   else {
+      /* 4-component swizzle (vector) */
+      GLint k;
+      for (k = 0; k < 4 && token[k]; k++) {
+         if (token[k] == 'x')
+            swizzle[k] = 0;
+         else if (token[k] == 'y')
+            swizzle[k] = 1;
+         else if (token[k] == 'z')
+            swizzle[k] = 2;
+         else if (token[k] == 'w')
+            swizzle[k] = 3;
+         else
+            return GL_FALSE;
+      }
+      if (k != 4)
+         return GL_FALSE;
+   }
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_CondCodeMask(struct parse_state *parseState,
+                   struct prog_dst_register *dstReg)
+{
+   if (Parse_String(parseState, "EQ"))
+      dstReg->CondMask = COND_EQ;
+   else if (Parse_String(parseState, "GE"))
+      dstReg->CondMask = COND_GE;
+   else if (Parse_String(parseState, "GT"))
+      dstReg->CondMask = COND_GT;
+   else if (Parse_String(parseState, "LE"))
+      dstReg->CondMask = COND_LE;
+   else if (Parse_String(parseState, "LT"))
+      dstReg->CondMask = COND_LT;
+   else if (Parse_String(parseState, "NE"))
+      dstReg->CondMask = COND_NE;
+   else if (Parse_String(parseState, "TR"))
+      dstReg->CondMask = COND_TR;
+   else if (Parse_String(parseState, "FL"))
+      dstReg->CondMask = COND_FL;
+   else
+      RETURN_ERROR1("Invalid condition code mask");
+
+   /* look for optional .xyzw swizzle */
+   if (Parse_String(parseState, ".")) {
+      GLubyte token[100];
+      GLuint swz[4];
+
+      if (!Parse_Token(parseState, token))  /* get xyzw suffix */
+         RETURN_ERROR;
+
+      if (!Parse_SwizzleSuffix(token, swz))
+         RETURN_ERROR1("Invalid swizzle suffix");
+
+      dstReg->CondSwizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse a temporary register: Rnn or Hnn
+ */
+static GLboolean
+Parse_TempReg(struct parse_state *parseState, GLint *tempRegNum)
+{
+   GLubyte token[100];
+
+   /* Should be 'R##' or 'H##' */
+   if (!Parse_Token(parseState, token))
+      RETURN_ERROR;
+   if (token[0] != 'R' && token[0] != 'H')
+      RETURN_ERROR1("Expected R## or H##");
+
+   if (IsDigit(token[1])) {
+      GLint reg = atoi((const char *) (token + 1));
+      if (token[0] == 'H')
+         reg += 32;
+      if (reg >= MAX_NV_FRAGMENT_PROGRAM_TEMPS)
+         RETURN_ERROR1("Invalid temporary register name");
+      *tempRegNum = reg;
+   }
+   else {
+      RETURN_ERROR1("Invalid temporary register name");
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse a write-only dummy register: RC or HC.
+ */
+static GLboolean
+Parse_DummyReg(struct parse_state *parseState, GLint *regNum)
+{
+   if (Parse_String(parseState, "RC")) {
+       *regNum = 0;
+   }
+   else if (Parse_String(parseState, "HC")) {
+       *regNum = 1;
+   }
+   else {
+      RETURN_ERROR1("Invalid write-only register name");
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse a program local parameter register "p[##]"
+ */
+static GLboolean
+Parse_ProgramParamReg(struct parse_state *parseState, GLint *regNum)
+{
+   GLubyte token[100];
+
+   if (!Parse_String(parseState, "p["))
+      RETURN_ERROR1("Expected p[");
+
+   if (!Parse_Token(parseState, token))
+      RETURN_ERROR;
+
+   if (IsDigit(token[0])) {
+      /* a numbered program parameter register */
+      GLint reg = atoi((const char *) token);
+      if (reg >= MAX_NV_FRAGMENT_PROGRAM_PARAMS)
+         RETURN_ERROR1("Invalid constant program number");
+      *regNum = reg;
+   }
+   else {
+      RETURN_ERROR;
+   }
+
+   if (!Parse_String(parseState, "]"))
+      RETURN_ERROR1("Expected ]");
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Parse f[name]  - fragment input register
+ */
+static GLboolean
+Parse_FragReg(struct parse_state *parseState, GLint *tempRegNum)
+{
+   GLubyte token[100];
+   GLint j;
+
+   /* Match 'f[' */
+   if (!Parse_String(parseState, "f["))
+      RETURN_ERROR1("Expected f[");
+
+   /* get <name> and look for match */
+   if (!Parse_Token(parseState, token)) {
+      RETURN_ERROR;
+   }
+   for (j = 0; InputRegisters[j]; j++) {
+      if (strcmp((const char *) token, InputRegisters[j]) == 0) {
+         *tempRegNum = j;
+         parseState->inputsRead |= (1 << j);
+         break;
+      }
+   }
+   if (!InputRegisters[j]) {
+      /* unknown input register label */
+      RETURN_ERROR2("Invalid register name", token);
+   }
+
+   /* Match '[' */
+   if (!Parse_String(parseState, "]"))
+      RETURN_ERROR1("Expected ]");
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_OutputReg(struct parse_state *parseState, GLint *outputRegNum)
+{
+   GLubyte token[100];
+
+   /* Match "o[" */
+   if (!Parse_String(parseState, "o["))
+      RETURN_ERROR1("Expected o[");
+
+   /* Get output reg name */
+   if (!Parse_Token(parseState, token))
+      RETURN_ERROR;
+
+   /* try to match an output register name */
+   if (strcmp((char *) token, "COLR") == 0 ||
+       strcmp((char *) token, "COLH") == 0) {
+      /* note that we don't distinguish between COLR and COLH */
+      *outputRegNum = FRAG_RESULT_COLOR;
+      parseState->outputsWritten |= (1 << FRAG_RESULT_COLOR);
+   }
+   else if (strcmp((char *) token, "DEPR") == 0) {
+      *outputRegNum = FRAG_RESULT_DEPTH;
+      parseState->outputsWritten |= (1 << FRAG_RESULT_DEPTH);
+   }
+   else {
+      RETURN_ERROR1("Invalid output register name");
+   }
+
+   /* Match ']' */
+   if (!Parse_String(parseState, "]"))
+      RETURN_ERROR1("Expected ]");
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_MaskedDstReg(struct parse_state *parseState,
+                   struct prog_dst_register *dstReg)
+{
+   GLubyte token[100];
+   GLint idx;
+
+   /* Dst reg can be R<n>, H<n>, o[n], RC or HC */
+   if (!Peek_Token(parseState, token))
+      RETURN_ERROR;
+
+   if (strcmp((const char *) token, "RC") == 0 ||
+       strcmp((const char *) token, "HC") == 0) {
+      /* a write-only register */
+      dstReg->File = PROGRAM_WRITE_ONLY;
+      if (!Parse_DummyReg(parseState, &idx))
+         RETURN_ERROR;
+      dstReg->Index = idx;
+   }
+   else if (token[0] == 'R' || token[0] == 'H') {
+      /* a temporary register */
+      dstReg->File = PROGRAM_TEMPORARY;
+      if (!Parse_TempReg(parseState, &idx))
+         RETURN_ERROR;
+      dstReg->Index = idx;
+   }
+   else if (token[0] == 'o') {
+      /* an output register */
+      dstReg->File = PROGRAM_OUTPUT;
+      if (!Parse_OutputReg(parseState, &idx))
+         RETURN_ERROR;
+      dstReg->Index = idx;
+   }
+   else {
+      RETURN_ERROR1("Invalid destination register name");
+   }
+
+   /* Parse optional write mask */
+   if (Parse_String(parseState, ".")) {
+      /* got a mask */
+      GLint k = 0;
+
+      if (!Parse_Token(parseState, token))  /* get xyzw writemask */
+         RETURN_ERROR;
+
+      dstReg->WriteMask = 0;
+
+      if (token[k] == 'x') {
+         dstReg->WriteMask |= WRITEMASK_X;
+         k++;
+      }
+      if (token[k] == 'y') {
+         dstReg->WriteMask |= WRITEMASK_Y;
+         k++;
+      }
+      if (token[k] == 'z') {
+         dstReg->WriteMask |= WRITEMASK_Z;
+         k++;
+      }
+      if (token[k] == 'w') {
+         dstReg->WriteMask |= WRITEMASK_W;
+         k++;
+      }
+      if (k == 0) {
+         RETURN_ERROR1("Invalid writemask character");
+      }
+
+   }
+   else {
+      dstReg->WriteMask = WRITEMASK_XYZW;
+   }
+
+   /* optional condition code mask */
+   if (Parse_String(parseState, "(")) {
+      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".x|y|z|w) */
+      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".[xyzw]) */
+      if (!Parse_CondCodeMask(parseState, dstReg))
+         RETURN_ERROR;
+
+      if (!Parse_String(parseState, ")"))  /* consume ")" */
+         RETURN_ERROR1("Expected )");
+
+      return GL_TRUE;
+   }
+   else {
+      /* no cond code mask */
+      dstReg->CondMask = COND_TR;
+      dstReg->CondSwizzle = SWIZZLE_NOOP;
+      return GL_TRUE;
+   }
+}
+
+
+/**
+ * Parse a vector source (register, constant, etc):
+ *   <vectorSrc>    ::= <absVectorSrc>
+ *                    | <baseVectorSrc>
+ *   <absVectorSrc> ::= <negate> "|" <baseVectorSrc> "|"
+ */
+static GLboolean
+Parse_VectorSrc(struct parse_state *parseState,
+                struct prog_src_register *srcReg)
+{
+   GLfloat sign = 1.0F;
+   GLubyte token[100];
+   GLint idx;
+   GLuint negateBase, negateAbs;
+
+   /*
+    * First, take care of +/- and absolute value stuff.
+    */
+   if (Parse_String(parseState, "-"))
+      sign = -1.0F;
+   else if (Parse_String(parseState, "+"))
+      sign = +1.0F;
+
+   if (Parse_String(parseState, "|")) {
+      srcReg->Abs = GL_TRUE;
+      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
+
+      if (Parse_String(parseState, "-"))
+         negateBase = NEGATE_XYZW;
+      else if (Parse_String(parseState, "+"))
+         negateBase = NEGATE_NONE;
+      else
+         negateBase = NEGATE_NONE;
+   }
+   else {
+      srcReg->Abs = GL_FALSE;
+      negateAbs = NEGATE_NONE;
+      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
+   }
+
+   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;
+
+   /* This should be the real src vector/register name */
+   if (!Peek_Token(parseState, token))
+      RETURN_ERROR;
+
+   /* Src reg can be Rn, Hn, f[n], p[n], a named parameter, a scalar
+    * literal or vector literal.
+    */
+   if (token[0] == 'R' || token[0] == 'H') {
+      srcReg->File = PROGRAM_TEMPORARY;
+      if (!Parse_TempReg(parseState, &idx))
+         RETURN_ERROR;
+      srcReg->Index = idx;
+   }
+   else if (token[0] == 'f') {
+      /* XXX this might be an identifier! */
+      srcReg->File = PROGRAM_INPUT;
+      if (!Parse_FragReg(parseState, &idx))
+         RETURN_ERROR;
+      srcReg->Index = idx;
+   }
+   else if (token[0] == 'p') {
+      /* XXX this might be an identifier! */
+      srcReg->File = PROGRAM_LOCAL_PARAM;
+      if (!Parse_ProgramParamReg(parseState, &idx))
+         RETURN_ERROR;
+      srcReg->Index = idx;
+   }
+   else if (IsLetter(token[0])){
+      GLubyte ident[100];
+      GLint paramIndex;
+      if (!Parse_Identifier(parseState, ident))
+         RETURN_ERROR;
+      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,
+                                                -1, (const char *) ident);
+      if (paramIndex < 0) {
+         RETURN_ERROR2("Undefined constant or parameter: ", ident);
+      }
+      srcReg->File = PROGRAM_NAMED_PARAM;
+      srcReg->Index = paramIndex;      
+   }
+   else if (IsDigit(token[0]) || token[0] == '-' || token[0] == '+' || token[0] == '.'){
+      /* literal scalar constant */
+      GLfloat values[4];
+      GLuint paramIndex;
+      if (!Parse_ScalarConstant(parseState, values))
+         RETURN_ERROR;
+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
+                                              (gl_constant_value *) values,
+                                              4, NULL);
+      srcReg->File = PROGRAM_NAMED_PARAM;
+      srcReg->Index = paramIndex;
+   }
+   else if (token[0] == '{'){
+      /* literal vector constant */
+      GLfloat values[4];
+      GLuint paramIndex;
+      (void) Parse_String(parseState, "{");
+      if (!Parse_VectorConstant(parseState, values))
+         RETURN_ERROR;
+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
+                                              (gl_constant_value *) values,
+                                              4, NULL);
+      srcReg->File = PROGRAM_NAMED_PARAM;
+      srcReg->Index = paramIndex;      
+   }
+   else {
+      RETURN_ERROR2("Invalid source register name", token);
+   }
+
+   /* init swizzle fields */
+   srcReg->Swizzle = SWIZZLE_NOOP;
+
+   /* Look for optional swizzle suffix */
+   if (Parse_String(parseState, ".")) {
+      GLuint swz[4];
+
+      if (!Parse_Token(parseState, token))
+         RETURN_ERROR;
+
+      if (!Parse_SwizzleSuffix(token, swz))
+         RETURN_ERROR1("Invalid swizzle suffix");
+
+      srcReg->Swizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
+   }
+
+   /* Finish absolute value */
+   if (srcReg->Abs && !Parse_String(parseState, "|")) {
+      RETURN_ERROR1("Expected |");
+   }
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_ScalarSrcReg(struct parse_state *parseState,
+                   struct prog_src_register *srcReg)
+{
+   GLubyte token[100];
+   GLfloat sign = 1.0F;
+   GLboolean needSuffix = GL_TRUE;
+   GLint idx;
+   GLuint negateBase, negateAbs;
+
+   /*
+    * First, take care of +/- and absolute value stuff.
+    */
+   if (Parse_String(parseState, "-"))
+      sign = -1.0F;
+   else if (Parse_String(parseState, "+"))
+      sign = +1.0F;
+
+   if (Parse_String(parseState, "|")) {
+      srcReg->Abs = GL_TRUE;
+      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
+
+      if (Parse_String(parseState, "-"))
+         negateBase = NEGATE_XYZW;
+      else if (Parse_String(parseState, "+"))
+         negateBase = NEGATE_NONE;
+      else
+         negateBase = NEGATE_NONE;
+   }
+   else {
+      srcReg->Abs = GL_FALSE;
+      negateAbs = NEGATE_NONE;
+      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
+   }
+
+   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;
+
+   if (!Peek_Token(parseState, token))
+      RETURN_ERROR;
+
+   /* Src reg can be R<n>, H<n> or a named fragment attrib */
+   if (token[0] == 'R' || token[0] == 'H') {
+      srcReg->File = PROGRAM_TEMPORARY;
+      if (!Parse_TempReg(parseState, &idx))
+         RETURN_ERROR;
+      srcReg->Index = idx;
+   }
+   else if (token[0] == 'f') {
+      srcReg->File = PROGRAM_INPUT;
+      if (!Parse_FragReg(parseState, &idx))
+         RETURN_ERROR;
+      srcReg->Index = idx;
+   }
+   else if (token[0] == '{') {
+      /* vector literal */
+      GLfloat values[4];
+      GLuint paramIndex;
+      (void) Parse_String(parseState, "{");
+      if (!Parse_VectorConstant(parseState, values))
+         RETURN_ERROR;
+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
+                                              (gl_constant_value *) values,
+                                              4, NULL);
+      srcReg->File = PROGRAM_NAMED_PARAM;
+      srcReg->Index = paramIndex;      
+   }
+   else if (IsLetter(token[0])){
+      /* named param/constant */
+      GLubyte ident[100];
+      GLint paramIndex;
+      if (!Parse_Identifier(parseState, ident))
+         RETURN_ERROR;
+      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,
+                                                -1, (const char *) ident);
+      if (paramIndex < 0) {
+         RETURN_ERROR2("Undefined constant or parameter: ", ident);
+      }
+      srcReg->File = PROGRAM_NAMED_PARAM;
+      srcReg->Index = paramIndex;      
+   }
+   else if (IsDigit(token[0])) {
+      /* scalar literal */
+      GLfloat values[4];
+      GLuint paramIndex;
+      if (!Parse_ScalarConstant(parseState, values))
+         RETURN_ERROR;
+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
+                                              (gl_constant_value *) values,
+                                              4, NULL);
+      srcReg->Index = paramIndex;      
+      srcReg->File = PROGRAM_NAMED_PARAM;
+      needSuffix = GL_FALSE;
+   }
+   else {
+      RETURN_ERROR2("Invalid scalar source argument", token);
+   }
+
+   srcReg->Swizzle = 0;
+   if (needSuffix) {
+      /* parse .[xyzw] suffix */
+      if (!Parse_String(parseState, "."))
+         RETURN_ERROR1("Expected .");
+
+      if (!Parse_Token(parseState, token))
+         RETURN_ERROR;
+
+      if (token[0] == 'x' && token[1] == 0) {
+         srcReg->Swizzle = 0;
+      }
+      else if (token[0] == 'y' && token[1] == 0) {
+         srcReg->Swizzle = 1;
+      }
+      else if (token[0] == 'z' && token[1] == 0) {
+         srcReg->Swizzle = 2;
+      }
+      else if (token[0] == 'w' && token[1] == 0) {
+         srcReg->Swizzle = 3;
+      }
+      else {
+         RETURN_ERROR1("Invalid scalar source suffix");
+      }
+   }
+
+   /* Finish absolute value */
+   if (srcReg->Abs && !Parse_String(parseState, "|")) {
+      RETURN_ERROR1("Expected |");
+   }
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_PrintInstruction(struct parse_state *parseState,
+                       struct prog_instruction *inst)
+{
+   const GLubyte *str;
+   GLubyte *msg;
+   GLuint len;
+   GLint idx;
+
+   /* The first argument is a literal string 'just like this' */
+   if (!Parse_String(parseState, "'"))
+      RETURN_ERROR1("Expected '");
+
+   str = parseState->pos;
+   for (len = 0; str[len] != '\''; len++) /* find closing quote */
+      ;
+   parseState->pos += len + 1;
+   msg = (GLubyte*) malloc(len + 1);
+
+   memcpy(msg, str, len);
+   msg[len] = 0;
+   inst->Data = msg;
+
+   if (Parse_String(parseState, ",")) {
+      /* got an optional register to print */
+      GLubyte token[100];
+      GetToken(parseState, token);
+      if (token[0] == 'o') {
+         /* dst reg */
+         if (!Parse_OutputReg(parseState, &idx))
+            RETURN_ERROR;
+	 inst->SrcReg[0].Index = idx;
+         inst->SrcReg[0].File = PROGRAM_OUTPUT;
+      }
+      else {
+         /* src reg */
+         if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
+            RETURN_ERROR;
+      }
+   }
+   else {
+      inst->SrcReg[0].File = PROGRAM_UNDEFINED;
+   }
+
+   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
+   inst->SrcReg[0].Abs = GL_FALSE;
+   inst->SrcReg[0].Negate = NEGATE_NONE;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+Parse_InstructionSequence(struct parse_state *parseState,
+                          struct prog_instruction program[])
+{
+   while (1) {
+      struct prog_instruction *inst = program + parseState->numInst;
+      struct instruction_pattern instMatch;
+      GLubyte token[100];
+
+      /* Initialize the instruction */
+      _mesa_init_instructions(inst, 1);
+
+      /* special instructions */
+      if (Parse_String(parseState, "DEFINE")) {
+         GLubyte id[100];
+         GLfloat value[7];  /* yes, 7 to be safe */
+         if (!Parse_Identifier(parseState, id))
+            RETURN_ERROR;
+         /* XXX make sure id is not a reserved identifer, like R9 */
+         if (!Parse_String(parseState, "="))
+            RETURN_ERROR1("Expected =");
+         if (!Parse_VectorOrScalarConstant(parseState, value))
+            RETURN_ERROR;
+         if (!Parse_String(parseState, ";"))
+            RETURN_ERROR1("Expected ;");
+         if (_mesa_lookup_parameter_index(parseState->parameters,
+                                          -1, (const char *) id) >= 0) {
+            RETURN_ERROR2(id, "already defined");
+         }
+         _mesa_add_named_parameter(parseState->parameters,
+                                   (const char *) id,
+                                   (gl_constant_value *) value);
+      }
+      else if (Parse_String(parseState, "DECLARE")) {
+         GLubyte id[100];
+         GLfloat value[7] = {0, 0, 0, 0, 0, 0, 0};  /* yes, to be safe */
+         if (!Parse_Identifier(parseState, id))
+            RETURN_ERROR;
+         /* XXX make sure id is not a reserved identifer, like R9 */
+         if (Parse_String(parseState, "=")) {
+            if (!Parse_VectorOrScalarConstant(parseState, value))
+               RETURN_ERROR;
+         }
+         if (!Parse_String(parseState, ";"))
+            RETURN_ERROR1("Expected ;");
+         if (_mesa_lookup_parameter_index(parseState->parameters,
+                                          -1, (const char *) id) >= 0) {
+            RETURN_ERROR2(id, "already declared");
+         }
+         _mesa_add_named_parameter(parseState->parameters,
+                                   (const char *) id,
+                                   (gl_constant_value *) value);
+      }
+      else if (Parse_String(parseState, "END")) {
+         inst->Opcode = OPCODE_END;
+         parseState->numInst++;
+         if (Parse_Token(parseState, token)) {
+            RETURN_ERROR1("Code after END opcode.");
+         }
+         break;
+      }
+      else {
+         /* general/arithmetic instruction */
+
+         /* get token */
+         if (!Parse_Token(parseState, token)) {
+            RETURN_ERROR1("Missing END instruction.");
+         }
+
+         /* try to find matching instuction */
+         instMatch = MatchInstruction(token);
+         if (instMatch.opcode >= MAX_OPCODE) {
+            /* bad instruction name */
+            RETURN_ERROR2("Unexpected token: ", token);
+         }
+
+         inst->Opcode = instMatch.opcode;
+         inst->Precision = instMatch.suffixes & (_R | _H | _X);
+         inst->SaturateMode = (instMatch.suffixes & (_S))
+            ? SATURATE_ZERO_ONE : SATURATE_OFF;
+         inst->CondUpdate = (instMatch.suffixes & (_C)) ? GL_TRUE : GL_FALSE;
+
+         /*
+          * parse the input and output operands
+          */
+         if (instMatch.outputs == OUTPUT_S || instMatch.outputs == OUTPUT_V) {
+            if (!Parse_MaskedDstReg(parseState, &inst->DstReg))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+         }
+         else if (instMatch.outputs == OUTPUT_NONE) {
+            if (instMatch.opcode == OPCODE_KIL_NV) {
+               /* This is a little weird, the cond code info is in
+                * the dest register.
+                */
+               if (!Parse_CondCodeMask(parseState, &inst->DstReg))
+                  RETURN_ERROR;
+            }
+            else {
+               ASSERT(instMatch.opcode == OPCODE_PRINT);
+            }
+         }
+
+         if (instMatch.inputs == INPUT_1V) {
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+         }
+         else if (instMatch.inputs == INPUT_2V) {
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))
+               RETURN_ERROR;
+         }
+         else if (instMatch.inputs == INPUT_3V) {
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))
+               RETURN_ERROR;
+         }
+         else if (instMatch.inputs == INPUT_1S) {
+            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+         }
+         else if (instMatch.inputs == INPUT_2S) {
+            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[1]))
+               RETURN_ERROR;
+         }
+         else if (instMatch.inputs == INPUT_CC) {
+            /* XXX to-do */
+         }
+         else if (instMatch.inputs == INPUT_1V_T) {
+	    GLubyte unit, idx;
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_TextureImageId(parseState, &unit, &idx))
+               RETURN_ERROR;
+	    inst->TexSrcUnit = unit;
+	    inst->TexSrcTarget = idx;
+         }
+         else if (instMatch.inputs == INPUT_3V_T) {
+	    GLubyte unit, idx;
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))
+               RETURN_ERROR;
+            if (!Parse_String(parseState, ","))
+               RETURN_ERROR1("Expected ,");
+            if (!Parse_TextureImageId(parseState, &unit, &idx))
+               RETURN_ERROR;
+	    inst->TexSrcUnit = unit;
+	    inst->TexSrcTarget = idx;
+         }
+         else if (instMatch.inputs == INPUT_1V_S) {
+            if (!Parse_PrintInstruction(parseState, inst))
+               RETURN_ERROR;
+         }
+
+         /* end of statement semicolon */
+         if (!Parse_String(parseState, ";"))
+            RETURN_ERROR1("Expected ;");
+
+         parseState->numInst++;
+
+         if (parseState->numInst >= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS)
+            RETURN_ERROR1("Program too long");
+      }
+   }
+   return GL_TRUE;
+}
+
+
+
+/**
+ * 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_fragment_program(struct gl_context *ctx, GLenum dstTarget,
+                                const GLubyte *str, GLsizei len,
+                                struct gl_fragment_program *program)
+{
+   struct parse_state parseState;
+   struct prog_instruction instBuffer[MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS];
+   struct prog_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;
+
+   /* Get ready to parse */
+   memset(&parseState, 0, sizeof(struct parse_state));
+   parseState.ctx = ctx;
+   parseState.start = programString;
+   parseState.program = program;
+   parseState.numInst = 0;
+   parseState.curLine = programString;
+   parseState.parameters = _mesa_new_parameter_list();
+
+   /* Reset error state */
+   _mesa_set_program_error(ctx, -1, NULL);
+
+   /* check the program header */
+   if (strncmp((const char *) programString, "!!FP1.0", 7) == 0) {
+      target = GL_FRAGMENT_PROGRAM_NV;
+      parseState.pos = programString + 7;
+   }
+   else if (strncmp((const char *) programString, "!!FCP1.0", 8) == 0) {
+      /* fragment / register combiner program - not supported */
+      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");
+      return;
+   }
+   else {
+      /* invalid header */
+      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");
+      _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 0x%x != 0x%x)",
+                  target, dstTarget);
+      return;
+   }
+
+   if (Parse_InstructionSequence(&parseState, instBuffer)) {
+      GLuint u;
+      /* successful parse! */
+
+      if (parseState.outputsWritten == 0) {
+         /* must write at least one output! */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "Invalid fragment program - no outputs written.");
+         return;
+      }
+
+      /* copy the compiled instructions */
+      assert(parseState.numInst <= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS);
+      newInst = _mesa_alloc_instructions(parseState.numInst);
+      if (!newInst) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");
+         return;  /* out of memory */
+      }
+      _mesa_copy_instructions(newInst, instBuffer, parseState.numInst);
+
+      /* install the program */
+      program->Base.Target = target;
+      if (program->Base.String) {
+         FREE(program->Base.String);
+      }
+      program->Base.String = programString;
+      program->Base.Format = GL_PROGRAM_FORMAT_ASCII_ARB;
+      if (program->Base.Instructions) {
+         free(program->Base.Instructions);
+      }
+      program->Base.Instructions = newInst;
+      program->Base.NumInstructions = parseState.numInst;
+      program->Base.InputsRead = parseState.inputsRead;
+      program->Base.OutputsWritten = parseState.outputsWritten;
+      for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++)
+         program->Base.TexturesUsed[u] = parseState.texturesUsed[u];
+
+      /* save program parameters */
+      program->Base.Parameters = parseState.parameters;
+
+      /* allocate registers for declared program parameters */
+#if 00
+      _mesa_assign_program_registers(&(program->SymbolTable));
+#endif
+
+#ifdef DEBUG_foo
+      printf("--- glLoadProgramNV(%d) result ---\n", program->Base.Id);
+      _mesa_fprint_program_opt(stdout, &program->Base, PROG_PRINT_NV, 0);
+      printf("----------------------------------\n");
+#endif
+   }
+   else {
+      /* Error! */
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV");
+      /* NOTE: _mesa_set_program_error would have been called already */
+   }
+}
+
+
+const char *
+_mesa_nv_fragment_input_register_name(GLuint i)
+{
+   ASSERT(i < MAX_NV_FRAGMENT_PROGRAM_INPUTS);
+   return InputRegisters[i];
+}
+