Merge branch 'glsl2-head' into glsl2

This brings in the standalone GLSL compiler that we are planning on
replacing the existing Mesa GLSL compiler.  It currently targets GLSL
1.20 and the Mesa IR.

1 files changed, 1089 insertions, 0 deletions

diff --git a/src/glsl/mesa/shader/prog_print.c b/src/glsl/mesa/shader/prog_print.c
new file mode 100644
index 0000000000..3f1cb48e4b
--- /dev/null
+++ b/src/glsl/mesa/shader/prog_print.c
@@ -0,0 +1,1089 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.3
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file prog_print.c
+ * Print vertex/fragment programs - for debugging.
+ * \author Brian Paul
+ */
+
+#if 0
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/imports.h"
+#else
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+struct gl_program {
+   int Target;
+};
+
+void _mesa_problem(void *ctx, char *msg)
+{
+   (void)ctx;
+   fprintf(stderr, "%s", msg);
+   exit(1);
+}
+
+#endif
+
+#include "prog_instruction.h"
+#include "prog_print.h"
+
+
+
+/**
+ * Return string name for given program/register file.
+ */
+static const char *
+file_string(gl_register_file f, gl_prog_print_mode mode)
+{
+   (void)mode;
+   switch (f) {
+   case PROGRAM_TEMPORARY:
+      return "TEMP";
+   case PROGRAM_LOCAL_PARAM:
+      return "LOCAL";
+   case PROGRAM_ENV_PARAM:
+      return "ENV";
+   case PROGRAM_STATE_VAR:
+      return "STATE";
+   case PROGRAM_INPUT:
+      return "INPUT";
+   case PROGRAM_OUTPUT:
+      return "OUTPUT";
+   case PROGRAM_NAMED_PARAM:
+      return "NAMED";
+   case PROGRAM_CONSTANT:
+      return "CONST";
+   case PROGRAM_UNIFORM:
+      return "UNIFORM";
+   case PROGRAM_VARYING:
+      return "VARYING";
+   case PROGRAM_WRITE_ONLY:
+      return "WRITE_ONLY";
+   case PROGRAM_ADDRESS:
+      return "ADDR";
+   case PROGRAM_SAMPLER:
+      return "SAMPLER";
+   case PROGRAM_UNDEFINED:
+      return "UNDEFINED";
+   default:
+      {
+         static char s[20];
+         snprintf(s, sizeof(s), "FILE%u", f);
+         return s;
+      }
+   }
+}
+
+
+/**
+ * Return ARB_v/f_prog-style input attrib string.
+ */
+static const char *
+arb_input_attrib_string(GLint index, GLenum progType)
+{
+   /*
+    * These strings should match the VERT_ATTRIB_x and FRAG_ATTRIB_x tokens.
+    */
+   const char *vertAttribs[] = {
+      "vertex.position",
+      "vertex.weight",
+      "vertex.normal",
+      "vertex.color.primary",
+      "vertex.color.secondary",
+      "vertex.fogcoord",
+      "vertex.(six)",
+      "vertex.(seven)",
+      "vertex.texcoord[0]",
+      "vertex.texcoord[1]",
+      "vertex.texcoord[2]",
+      "vertex.texcoord[3]",
+      "vertex.texcoord[4]",
+      "vertex.texcoord[5]",
+      "vertex.texcoord[6]",
+      "vertex.texcoord[7]",
+      "vertex.attrib[0]",
+      "vertex.attrib[1]",
+      "vertex.attrib[2]",
+      "vertex.attrib[3]",
+      "vertex.attrib[4]",
+      "vertex.attrib[5]",
+      "vertex.attrib[6]",
+      "vertex.attrib[7]",
+      "vertex.attrib[8]",
+      "vertex.attrib[9]",
+      "vertex.attrib[10]",
+      "vertex.attrib[11]",
+      "vertex.attrib[12]",
+      "vertex.attrib[13]",
+      "vertex.attrib[14]",
+      "vertex.attrib[15]"
+   };
+   const char *fragAttribs[] = {
+      "fragment.position",
+      "fragment.color.primary",
+      "fragment.color.secondary",
+      "fragment.fogcoord",
+      "fragment.texcoord[0]",
+      "fragment.texcoord[1]",
+      "fragment.texcoord[2]",
+      "fragment.texcoord[3]",
+      "fragment.texcoord[4]",
+      "fragment.texcoord[5]",
+      "fragment.texcoord[6]",
+      "fragment.texcoord[7]",
+      "fragment.varying[0]",
+      "fragment.varying[1]",
+      "fragment.varying[2]",
+      "fragment.varying[3]",
+      "fragment.varying[4]",
+      "fragment.varying[5]",
+      "fragment.varying[6]",
+      "fragment.varying[7]"
+   };
+
+   /* sanity checks */
+   assert(strcmp(vertAttribs[VERT_ATTRIB_TEX0], "vertex.texcoord[0]") == 0);
+   assert(strcmp(vertAttribs[VERT_ATTRIB_GENERIC15], "vertex.attrib[15]") == 0);
+
+   if (progType == GL_VERTEX_PROGRAM_ARB) {
+      assert((unsigned int)index < sizeof(vertAttribs) / sizeof(vertAttribs[0]));
+      return vertAttribs[index];
+   }
+   else {
+      assert((unsigned int)index < sizeof(fragAttribs) / sizeof(fragAttribs[0]));
+      return fragAttribs[index];
+   }
+}
+
+
+/**
+ * Print a vertex program's InputsRead field in human-readable format.
+ * For debugging.
+ */
+void
+_mesa_print_vp_inputs(GLbitfield inputs)
+{
+   printf("VP Inputs 0x%x: \n", inputs);
+   while (inputs) {
+      GLint attr = ffs(inputs) - 1;
+      const char *name = arb_input_attrib_string(attr,
+                                                 GL_VERTEX_PROGRAM_ARB);
+      printf("  %d: %s\n", attr, name);
+      inputs &= ~(1 << attr);
+   }
+}
+
+
+/**
+ * Print a fragment program's InputsRead field in human-readable format.
+ * For debugging.
+ */
+void
+_mesa_print_fp_inputs(GLbitfield inputs)
+{
+   printf("FP Inputs 0x%x: \n", inputs);
+   while (inputs) {
+      GLint attr = ffs(inputs) - 1;
+      const char *name = arb_input_attrib_string(attr,
+                                                 GL_FRAGMENT_PROGRAM_ARB);
+      printf("  %d: %s\n", attr, name);
+      inputs &= ~(1 << attr);
+   }
+}
+
+
+#if 0
+/**
+ * Return ARB_v/f_prog-style output attrib string.
+ */
+static const char *
+arb_output_attrib_string(GLint index, GLenum progType)
+{
+   /*
+    * These strings should match the VERT_RESULT_x and FRAG_RESULT_x tokens.
+    */
+   const char *vertResults[] = {
+      "result.position",
+      "result.color.primary",
+      "result.color.secondary",
+      "result.fogcoord",
+      "result.texcoord[0]",
+      "result.texcoord[1]",
+      "result.texcoord[2]",
+      "result.texcoord[3]",
+      "result.texcoord[4]",
+      "result.texcoord[5]",
+      "result.texcoord[6]",
+      "result.texcoord[7]",
+      "result.varying[0]",
+      "result.varying[1]",
+      "result.varying[2]",
+      "result.varying[3]",
+      "result.varying[4]",
+      "result.varying[5]",
+      "result.varying[6]",
+      "result.varying[7]"
+   };
+   const char *fragResults[] = {
+      "result.color",
+      "result.color(half)",
+      "result.depth",
+      "result.color[0]",
+      "result.color[1]",
+      "result.color[2]",
+      "result.color[3]"
+   };
+
+   if (progType == GL_VERTEX_PROGRAM_ARB) {
+      assert(index < sizeof(vertResults) / sizeof(vertResults[0]));
+      return vertResults[index];
+   }
+   else {
+      assert(index < sizeof(fragResults) / sizeof(fragResults[0]));
+      return fragResults[index];
+   }
+}
+#endif
+
+/**
+ * Return string representation of the given register.
+ * Note that some types of registers (like PROGRAM_UNIFORM) aren't defined
+ * by the ARB/NV program languages so we've taken some liberties here.
+ * \param f  the register file (PROGRAM_INPUT, PROGRAM_TEMPORARY, etc)
+ * \param index  number of the register in the register file
+ * \param mode  the output format/mode/style
+ * \param prog  pointer to containing program
+ */
+static const char *
+reg_string(gl_register_file f, GLint index, gl_prog_print_mode mode,
+           GLboolean relAddr, const struct gl_program *prog)
+{
+   static char str[100];
+   const char *addr = relAddr ? "ADDR+" : "";
+
+   str[0] = 0;
+
+   switch (mode) {
+   case PROG_PRINT_DEBUG:
+      sprintf(str, "%s[%s%d]", file_string(f, mode), addr, index);
+      break;
+   case PROG_PRINT_ARB:
+#if 0
+      switch (f) {
+      case PROGRAM_INPUT:
+         sprintf(str, "%s", arb_input_attrib_string(index, prog->Target));
+         break;
+      case PROGRAM_OUTPUT:
+         sprintf(str, "%s", arb_output_attrib_string(index, prog->Target));
+         break;
+      case PROGRAM_TEMPORARY:
+         sprintf(str, "temp%d", index);
+         break;
+      case PROGRAM_ENV_PARAM:
+         sprintf(str, "program.env[%s%d]", addr, index);
+         break;
+      case PROGRAM_LOCAL_PARAM:
+         sprintf(str, "program.local[%s%d]", addr, index);
+         break;
+      case PROGRAM_VARYING: /* extension */
+         sprintf(str, "varying[%s%d]", addr, index);
+         break;
+      case PROGRAM_CONSTANT: /* extension */
+         sprintf(str, "constant[%s%d]", addr, index);
+         break;
+      case PROGRAM_UNIFORM: /* extension */
+         sprintf(str, "uniform[%s%d]", addr, index);
+         break;
+      case PROGRAM_STATE_VAR:
+         {
+            struct gl_program_parameter *param
+               = prog->Parameters->Parameters + index;
+            char *state = _mesa_program_state_string(param->StateIndexes);
+            sprintf(str, "%s", state);
+            free(state);
+         }
+         break;
+      case PROGRAM_ADDRESS:
+         sprintf(str, "A%d", index);
+         break;
+      default:
+         _mesa_problem(NULL, "bad file in reg_string()");
+      }
+      break;
+#else
+      assert(0);
+      break;
+#endif
+
+   case PROG_PRINT_NV:
+      switch (f) {
+      case PROGRAM_INPUT:
+         if (prog->Target == GL_VERTEX_PROGRAM_ARB)
+            sprintf(str, "v[%d]", index);
+         else
+            sprintf(str, "f[%d]", index);
+         break;
+      case PROGRAM_OUTPUT:
+         sprintf(str, "o[%d]", index);
+         break;
+      case PROGRAM_TEMPORARY:
+         sprintf(str, "R%d", index);
+         break;
+      case PROGRAM_ENV_PARAM:
+         sprintf(str, "c[%d]", index);
+         break;
+      case PROGRAM_VARYING: /* extension */
+         sprintf(str, "varying[%s%d]", addr, index);
+         break;
+      case PROGRAM_UNIFORM: /* extension */
+         sprintf(str, "uniform[%s%d]", addr, index);
+         break;
+      case PROGRAM_CONSTANT: /* extension */
+         sprintf(str, "constant[%s%d]", addr, index);
+         break;
+      case PROGRAM_STATE_VAR: /* extension */
+         sprintf(str, "state[%s%d]", addr, index);
+         break;
+      default:
+         _mesa_problem(NULL, "bad file in reg_string()");
+      }
+      break;
+
+   default:
+      _mesa_problem(NULL, "bad mode in reg_string()");
+   }
+
+   return str;
+}
+
+
+/**
+ * Return a string representation of the given swizzle word.
+ * If extended is true, use extended (comma-separated) format.
+ * \param swizzle  the swizzle field
+ * \param negateBase  4-bit negation vector
+ * \param extended  if true, also allow 0, 1 values
+ */
+const char *
+_mesa_swizzle_string(GLuint swizzle, GLuint negateMask, GLboolean extended)
+{
+   static const char swz[] = "xyzw01!?";  /* See SWIZZLE_x definitions */
+   static char s[20];
+   GLuint i = 0;
+
+   if (!extended && swizzle == SWIZZLE_NOOP && negateMask == 0)
+      return ""; /* no swizzle/negation */
+
+   if (!extended)
+      s[i++] = '.';
+
+   if (negateMask & NEGATE_X)
+      s[i++] = '-';
+   s[i++] = swz[GET_SWZ(swizzle, 0)];
+
+   if (extended) {
+      s[i++] = ',';
+   }
+
+   if (negateMask & NEGATE_Y)
+      s[i++] = '-';
+   s[i++] = swz[GET_SWZ(swizzle, 1)];
+
+   if (extended) {
+      s[i++] = ',';
+   }
+
+   if (negateMask & NEGATE_Z)
+      s[i++] = '-';
+   s[i++] = swz[GET_SWZ(swizzle, 2)];
+
+   if (extended) {
+      s[i++] = ',';
+   }
+
+   if (negateMask & NEGATE_W)
+      s[i++] = '-';
+   s[i++] = swz[GET_SWZ(swizzle, 3)];
+
+   s[i] = 0;
+   return s;
+}
+
+
+void
+_mesa_print_swizzle(GLuint swizzle)
+{
+   if (swizzle == SWIZZLE_XYZW) {
+      printf(".xyzw\n");
+   }
+   else {
+      const char *s = _mesa_swizzle_string(swizzle, 0, 0);
+      printf("%s\n", s);
+   }
+}
+
+
+const char *
+_mesa_writemask_string(GLuint writeMask)
+{
+   static char s[10];
+   GLuint i = 0;
+
+   if (writeMask == WRITEMASK_XYZW)
+      return "";
+
+   s[i++] = '.';
+   if (writeMask & WRITEMASK_X)
+      s[i++] = 'x';
+   if (writeMask & WRITEMASK_Y)
+      s[i++] = 'y';
+   if (writeMask & WRITEMASK_Z)
+      s[i++] = 'z';
+   if (writeMask & WRITEMASK_W)
+      s[i++] = 'w';
+
+   s[i] = 0;
+   return s;
+}
+
+
+const char *
+_mesa_condcode_string(GLuint condcode)
+{
+   switch (condcode) {
+   case COND_GT:  return "GT";
+   case COND_EQ:  return "EQ";
+   case COND_LT:  return "LT";
+   case COND_UN:  return "UN";
+   case COND_GE:  return "GE";
+   case COND_LE:  return "LE";
+   case COND_NE:  return "NE";
+   case COND_TR:  return "TR";
+   case COND_FL:  return "FL";
+   default: return "cond???";
+   }
+}
+
+
+static void
+fprint_dst_reg(FILE * f,
+               const struct prog_dst_register *dstReg,
+               gl_prog_print_mode mode,
+               const struct gl_program *prog)
+{
+   fprintf(f, "%s%s",
+	   reg_string((gl_register_file) dstReg->File,
+		      dstReg->Index, mode, dstReg->RelAddr, prog),
+	   _mesa_writemask_string(dstReg->WriteMask));
+   
+   if (dstReg->CondMask != COND_TR) {
+      fprintf(f, " (%s.%s)",
+	      _mesa_condcode_string(dstReg->CondMask),
+	      _mesa_swizzle_string(dstReg->CondSwizzle,
+				   GL_FALSE, GL_FALSE));
+   }
+
+#if 0
+   fprintf(f, "%s[%d]%s",
+	   file_string((gl_register_file) dstReg->File, mode),
+	   dstReg->Index,
+	   _mesa_writemask_string(dstReg->WriteMask));
+#endif
+}
+
+
+static void
+fprint_src_reg(FILE *f,
+               const struct prog_src_register *srcReg, 
+               gl_prog_print_mode mode,
+               const struct gl_program *prog)
+{
+   const char *abs = srcReg->Abs ? "|" : "";
+
+   fprintf(f, "%s%s%s%s",
+	   abs,
+	   reg_string((gl_register_file) srcReg->File,
+		      srcReg->Index, mode, srcReg->RelAddr, prog),
+	   _mesa_swizzle_string(srcReg->Swizzle,
+				srcReg->Negate, GL_FALSE),
+	   abs);
+#if 0
+   fprintf(f, "%s[%d]%s",
+	   file_string((gl_register_file) srcReg->File, mode),
+	   srcReg->Index,
+	   _mesa_swizzle_string(srcReg->Swizzle,
+				srcReg->Negate, GL_FALSE));
+#endif
+}
+
+
+static void
+fprint_comment(FILE *f, const struct prog_instruction *inst)
+{
+   if (inst->Comment)
+      fprintf(f, ";  # %s\n", inst->Comment);
+   else
+      fprintf(f, ";\n");
+}
+
+
+static void
+fprint_alu_instruction(FILE *f,
+                       const struct prog_instruction *inst,
+                       const char *opcode_string, GLuint numRegs,
+                       gl_prog_print_mode mode,
+                       const struct gl_program *prog)
+{
+   GLuint j;
+
+   fprintf(f, "%s", opcode_string);
+   if (inst->CondUpdate)
+      fprintf(f, ".C");
+
+   /* frag prog only */
+   if (inst->SaturateMode == SATURATE_ZERO_ONE)
+      fprintf(f, "_SAT");
+
+   fprintf(f, " ");
+   if (inst->DstReg.File != PROGRAM_UNDEFINED) {
+      fprint_dst_reg(f, &inst->DstReg, mode, prog);
+   }
+   else {
+      fprintf(f, " ???");
+   }
+
+   if (numRegs > 0)
+      fprintf(f, ", ");
+
+   for (j = 0; j < numRegs; j++) {
+      fprint_src_reg(f, inst->SrcReg + j, mode, prog);
+      if (j + 1 < numRegs)
+	 fprintf(f, ", ");
+   }
+
+   fprint_comment(f, inst);
+}
+
+
+void
+_mesa_print_alu_instruction(const struct prog_instruction *inst,
+                            const char *opcode_string, GLuint numRegs)
+{
+   fprint_alu_instruction(stderr, inst, opcode_string,
+                          numRegs, PROG_PRINT_DEBUG, NULL);
+}
+
+
+/**
+ * Print a single vertex/fragment program instruction.
+ */
+GLint
+_mesa_fprint_instruction_opt(FILE *f,
+                            const struct prog_instruction *inst,
+                            GLint indent,
+                            gl_prog_print_mode mode,
+                            const struct gl_program *prog)
+{
+   GLint i;
+
+   if (inst->Opcode == OPCODE_ELSE ||
+       inst->Opcode == OPCODE_ENDIF ||
+       inst->Opcode == OPCODE_ENDLOOP ||
+       inst->Opcode == OPCODE_ENDSUB) {
+      indent -= 3;
+   }
+   for (i = 0; i < indent; i++) {
+      fprintf(f, " ");
+   }
+
+   switch (inst->Opcode) {
+   case OPCODE_PRINT:
+      fprintf(f, "PRINT '%s'", (char *) inst->Data);
+      if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
+         fprintf(f, ", ");
+         fprintf(f, "%s[%d]%s",
+		 file_string((gl_register_file) inst->SrcReg[0].File,
+			     mode),
+		 inst->SrcReg[0].Index,
+		 _mesa_swizzle_string(inst->SrcReg[0].Swizzle,
+				      inst->SrcReg[0].Negate, GL_FALSE));
+      }
+      if (inst->Comment)
+         fprintf(f, "  # %s", inst->Comment);
+      fprint_comment(f, inst);
+      break;
+   case OPCODE_SWZ:
+      fprintf(f, "SWZ");
+      if (inst->SaturateMode == SATURATE_ZERO_ONE)
+         fprintf(f, "_SAT");
+      fprintf(f, " ");
+      fprint_dst_reg(f, &inst->DstReg, mode, prog);
+      fprintf(f, ", %s[%d], %s",
+	      file_string((gl_register_file) inst->SrcReg[0].File,
+			  mode),
+	      inst->SrcReg[0].Index,
+	      _mesa_swizzle_string(inst->SrcReg[0].Swizzle,
+				   inst->SrcReg[0].Negate, GL_TRUE));
+      fprint_comment(f, inst);
+      break;
+   case OPCODE_TEX:
+   case OPCODE_TXP:
+   case OPCODE_TXL:
+   case OPCODE_TXB:
+      fprintf(f, "%s", _mesa_opcode_string(inst->Opcode));
+      if (inst->SaturateMode == SATURATE_ZERO_ONE)
+         fprintf(f, "_SAT");
+      fprintf(f, " ");
+      fprint_dst_reg(f, &inst->DstReg, mode, prog);
+      fprintf(f, ", ");
+      fprint_src_reg(f, &inst->SrcReg[0], mode, prog);
+      fprintf(f, ", texture[%d], ", inst->TexSrcUnit);
+      switch (inst->TexSrcTarget) {
+      case TEXTURE_1D_INDEX:   fprintf(f, "1D");    break;
+      case TEXTURE_2D_INDEX:   fprintf(f, "2D");    break;
+      case TEXTURE_3D_INDEX:   fprintf(f, "3D");    break;
+      case TEXTURE_CUBE_INDEX: fprintf(f, "CUBE");  break;
+      case TEXTURE_RECT_INDEX: fprintf(f, "RECT");  break;
+      case TEXTURE_1D_ARRAY_INDEX: fprintf(f, "1D_ARRAY"); break;
+      case TEXTURE_2D_ARRAY_INDEX: fprintf(f, "2D_ARRAY"); break;
+      default:
+         ;
+      }
+      if (inst->TexShadow)
+         fprintf(f, " SHADOW");
+      fprint_comment(f, inst);
+      break;
+
+   case OPCODE_KIL:
+      fprintf(f, "%s", _mesa_opcode_string(inst->Opcode));
+      fprintf(f, " ");
+      fprint_src_reg(f, &inst->SrcReg[0], mode, prog);
+      fprint_comment(f, inst);
+      break;
+   case OPCODE_KIL_NV:
+      fprintf(f, "%s", _mesa_opcode_string(inst->Opcode));
+      fprintf(f, " ");
+      fprintf(f, "%s.%s",
+	      _mesa_condcode_string(inst->DstReg.CondMask),
+	      _mesa_swizzle_string(inst->DstReg.CondSwizzle,
+				   GL_FALSE, GL_FALSE));
+      fprint_comment(f, inst);
+      break;
+
+   case OPCODE_ARL:
+      fprintf(f, "ARL ");
+      fprint_dst_reg(f, &inst->DstReg, mode, prog);
+      fprintf(f, ", ");
+      fprint_src_reg(f, &inst->SrcReg[0], mode, prog);
+      fprint_comment(f, inst);
+      break;
+   case OPCODE_BRA:
+      fprintf(f, "BRA %d (%s%s)",
+	      inst->BranchTarget,
+	      _mesa_condcode_string(inst->DstReg.CondMask),
+	      _mesa_swizzle_string(inst->DstReg.CondSwizzle, 0, GL_FALSE));
+      fprint_comment(f, inst);
+      break;
+   case OPCODE_IF:
+      if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
+         /* Use ordinary register */
+         fprintf(f, "IF ");
+         fprint_src_reg(f, &inst->SrcReg[0], mode, prog);
+         fprintf(f, "; ");
+      }
+      else {
+         /* Use cond codes */
+         fprintf(f, "IF (%s%s);",
+		 _mesa_condcode_string(inst->DstReg.CondMask),
+		 _mesa_swizzle_string(inst->DstReg.CondSwizzle,
+				      0, GL_FALSE));
+      }
+      fprintf(f, " # (if false, goto %d)", inst->BranchTarget);
+      fprint_comment(f, inst);
+      return indent + 3;
+   case OPCODE_ELSE:
+      fprintf(f, "ELSE; # (goto %d)\n", inst->BranchTarget);
+      return indent + 3;
+   case OPCODE_ENDIF:
+      fprintf(f, "ENDIF;\n");
+      break;
+   case OPCODE_BGNLOOP:
+      fprintf(f, "BGNLOOP; # (end at %d)\n", inst->BranchTarget);
+      return indent + 3;
+   case OPCODE_ENDLOOP:
+      fprintf(f, "ENDLOOP; # (goto %d)\n", inst->BranchTarget);
+      break;
+   case OPCODE_BRK:
+   case OPCODE_CONT:
+      fprintf(f, "%s (%s%s); # (goto %d)",
+	      _mesa_opcode_string(inst->Opcode),
+	      _mesa_condcode_string(inst->DstReg.CondMask),
+	      _mesa_swizzle_string(inst->DstReg.CondSwizzle, 0, GL_FALSE),
+	      inst->BranchTarget);
+      fprint_comment(f, inst);
+      break;
+
+   case OPCODE_BGNSUB:
+      if (mode == PROG_PRINT_NV) {
+         fprintf(f, "%s:\n", inst->Comment); /* comment is label */
+         return indent;
+      }
+      else {
+         fprintf(f, "BGNSUB");
+         fprint_comment(f, inst);
+         return indent + 3;
+      }
+   case OPCODE_ENDSUB:
+      if (mode == PROG_PRINT_DEBUG) {
+         fprintf(f, "ENDSUB");
+         fprint_comment(f, inst);
+      }
+      break;
+   case OPCODE_CAL:
+      if (mode == PROG_PRINT_NV) {
+         fprintf(f, "CAL %s;  # (goto %d)\n", inst->Comment, inst->BranchTarget);
+      }
+      else {
+         fprintf(f, "CAL %u", inst->BranchTarget);
+         fprint_comment(f, inst);
+      }
+      break;
+   case OPCODE_RET:
+      fprintf(f, "RET (%s%s)",
+	      _mesa_condcode_string(inst->DstReg.CondMask),
+	      _mesa_swizzle_string(inst->DstReg.CondSwizzle, 0, GL_FALSE));
+      fprint_comment(f, inst);
+      break;
+
+   case OPCODE_END:
+      fprintf(f, "END\n");
+      break;
+   case OPCODE_NOP:
+      if (mode == PROG_PRINT_DEBUG) {
+         fprintf(f, "NOP");
+         fprint_comment(f, inst);
+      }
+      else if (inst->Comment) {
+         /* ARB/NV extensions don't have NOP instruction */
+         fprintf(f, "# %s\n", inst->Comment);
+      }
+      break;
+   /* XXX may need other special-case instructions */
+   default:
+      if (inst->Opcode < MAX_OPCODE) {
+         /* typical alu instruction */
+         fprint_alu_instruction(f, inst,
+                                _mesa_opcode_string(inst->Opcode),
+                                _mesa_num_inst_src_regs(inst->Opcode),
+                                mode, prog);
+      }
+      else {
+         fprint_alu_instruction(f, inst,
+                                _mesa_opcode_string(inst->Opcode),
+                                3/*_mesa_num_inst_src_regs(inst->Opcode)*/,
+                                mode, prog);
+      }
+      break;
+   }
+   return indent;
+}
+
+
+GLint
+_mesa_print_instruction_opt(const struct prog_instruction *inst,
+                            GLint indent,
+                            gl_prog_print_mode mode,
+                            const struct gl_program *prog)
+{
+   return _mesa_fprint_instruction_opt(stderr, inst, indent, mode, prog);
+}
+
+
+void
+_mesa_print_instruction(const struct prog_instruction *inst)
+{
+   /* note: 4th param should be ignored for PROG_PRINT_DEBUG */
+   _mesa_fprint_instruction_opt(stdout, inst, 0, PROG_PRINT_DEBUG, NULL);
+}
+
+#if 0
+/**
+ * Print program, with options.
+ */
+void
+_mesa_fprint_program_opt(FILE *f,
+                         const struct gl_program *prog,
+                         gl_prog_print_mode mode,
+                         GLboolean lineNumbers)
+{
+   GLuint i, indent = 0;
+
+   switch (prog->Target) {
+   case GL_VERTEX_PROGRAM_ARB:
+      if (mode == PROG_PRINT_ARB)
+         fprintf(f, "!!ARBvp1.0\n");
+      else if (mode == PROG_PRINT_NV)
+         fprintf(f, "!!VP1.0\n");
+      else
+         fprintf(f, "# Vertex Program/Shader %u\n", prog->Id);
+      break;
+   case GL_FRAGMENT_PROGRAM_ARB:
+   case GL_FRAGMENT_PROGRAM_NV:
+      if (mode == PROG_PRINT_ARB)
+         fprintf(f, "!!ARBfp1.0\n");
+      else if (mode == PROG_PRINT_NV)
+         fprintf(f, "!!FP1.0\n");
+      else
+         fprintf(f, "# Fragment Program/Shader %u\n", prog->Id);
+      break;
+   }
+
+   for (i = 0; i < prog->NumInstructions; i++) {
+      if (lineNumbers)
+         fprintf(f, "%3d: ", i);
+      indent = _mesa_fprint_instruction_opt(f, prog->Instructions + i,
+                                           indent, mode, prog);
+   }
+}
+
+
+/**
+ * Print program to stderr, default options.
+ */
+void
+_mesa_print_program(const struct gl_program *prog)
+{
+   _mesa_fprint_program_opt(stderr, prog, PROG_PRINT_DEBUG, GL_TRUE);
+}
+
+/**
+ * Return binary representation of 64-bit value (as a string).
+ * Insert a comma to separate each group of 8 bits.
+ * Note we return a pointer to local static storage so this is not
+ * re-entrant, etc.
+ * XXX move to imports.[ch] if useful elsewhere.
+ */
+static const char *
+binary(GLbitfield64 val)
+{
+   static char buf[80];
+   GLint i, len = 0;
+   for (i = 63; i >= 0; --i) {
+      if (val & (1ULL << i))
+         buf[len++] = '1';
+      else if (len > 0 || i == 0)
+         buf[len++] = '0';
+      if (len > 0 && ((i-1) % 8) == 7)
+         buf[len++] = ',';
+   }
+   buf[len] = '\0';
+   return buf;
+}
+
+
+/**
+ * Print all of a program's parameters/fields to given file.
+ */
+static void
+_mesa_fprint_program_parameters(FILE *f,
+                                GLcontext *ctx,
+                                const struct gl_program *prog)
+{
+   GLuint i;
+
+   fprintf(f, "InputsRead: 0x%x (0b%s)\n",
+                 prog->InputsRead, binary(prog->InputsRead));
+   fprintf(f, "OutputsWritten: 0x%llx (0b%s)\n",
+                 prog->OutputsWritten, binary(prog->OutputsWritten));
+   fprintf(f, "NumInstructions=%d\n", prog->NumInstructions);
+   fprintf(f, "NumTemporaries=%d\n", prog->NumTemporaries);
+   fprintf(f, "NumParameters=%d\n", prog->NumParameters);
+   fprintf(f, "NumAttributes=%d\n", prog->NumAttributes);
+   fprintf(f, "NumAddressRegs=%d\n", prog->NumAddressRegs);
+   fprintf(f, "SamplersUsed: 0x%x (0b%s)\n",
+                 prog->SamplersUsed, binary(prog->SamplersUsed));
+   fprintf(f, "Samplers=[ ");
+   for (i = 0; i < MAX_SAMPLERS; i++) {
+      fprintf(f, "%d ", prog->SamplerUnits[i]);
+   }
+   fprintf(f, "]\n");
+
+   _mesa_load_state_parameters(ctx, prog->Parameters);
+
+#if 0
+   fprintf(f, "Local Params:\n");
+   for (i = 0; i < MAX_PROGRAM_LOCAL_PARAMS; i++){
+      const GLfloat *p = prog->LocalParams[i];
+      fprintf(f, "%2d: %f, %f, %f, %f\n", i, p[0], p[1], p[2], p[3]);
+   }
+#endif	
+   _mesa_print_parameter_list(prog->Parameters);
+}
+
+
+/**
+ * Print all of a program's parameters/fields to stderr.
+ */
+void
+_mesa_print_program_parameters(GLcontext *ctx, const struct gl_program *prog)
+{
+   _mesa_fprint_program_parameters(stderr, ctx, prog);
+}
+
+
+/**
+ * Print a program parameter list to given file.
+ */
+static void
+_mesa_fprint_parameter_list(FILE *f,
+                            const struct gl_program_parameter_list *list)
+{
+   const gl_prog_print_mode mode = PROG_PRINT_DEBUG;
+   GLuint i;
+
+   if (!list)
+      return;
+
+   if (0)
+      fprintf(f, "param list %p\n", (void *) list);
+   fprintf(f, "dirty state flags: 0x%x\n", list->StateFlags);
+   for (i = 0; i < list->NumParameters; i++){
+      struct gl_program_parameter *param = list->Parameters + i;
+      const GLfloat *v = list->ParameterValues[i];
+      fprintf(f, "param[%d] sz=%d %s %s = {%.3g, %.3g, %.3g, %.3g}",
+	      i, param->Size,
+	      file_string(list->Parameters[i].Type, mode),
+	      param->Name, v[0], v[1], v[2], v[3]);
+      if (param->Flags & PROG_PARAM_BIT_CENTROID)
+         fprintf(f, " Centroid");
+      if (param->Flags & PROG_PARAM_BIT_INVARIANT)
+         fprintf(f, " Invariant");
+      if (param->Flags & PROG_PARAM_BIT_FLAT)
+         fprintf(f, " Flat");
+      if (param->Flags & PROG_PARAM_BIT_LINEAR)
+         fprintf(f, " Linear");
+      fprintf(f, "\n");
+   }
+}
+
+
+/**
+ * Print a program parameter list to stderr.
+ */
+void
+_mesa_print_parameter_list(const struct gl_program_parameter_list *list)
+{
+   _mesa_fprint_parameter_list(stderr, list);
+}
+
+
+/**
+ * Write shader and associated info to a file.
+ */
+void
+_mesa_write_shader_to_file(const struct gl_shader *shader)
+{
+   const char *type;
+   char filename[100];
+   FILE *f;
+
+   if (shader->Type == GL_FRAGMENT_SHADER)
+      type = "frag";
+   else
+      type = "vert";
+
+   snprintf(filename, sizeof(filename), "shader_%u.%s", shader->Name, type);
+   f = fopen(filename, "w");
+   if (!f) {
+      fprintf(stderr, "Unable to open %s for writing\n", filename);
+      return;
+   }
+
+   fprintf(f, "/* Shader %u source, checksum %u */\n", shader->Name, shader->SourceChecksum);
+   fputs(shader->Source, f);
+   fprintf(f, "\n");
+
+   fprintf(f, "/* Compile status: %s */\n",
+           shader->CompileStatus ? "ok" : "fail");
+   if (!shader->CompileStatus) {
+      fprintf(f, "/* Log Info: */\n");
+      fputs(shader->InfoLog, f);
+   }
+   else {
+      fprintf(f, "/* GPU code */\n");
+      fprintf(f, "/*\n");
+      _mesa_fprint_program_opt(f, shader->Program, PROG_PRINT_DEBUG, GL_TRUE);
+      fprintf(f, "*/\n");
+      fprintf(f, "/* Parameters / constants */\n");
+      fprintf(f, "/*\n");
+      _mesa_fprint_parameter_list(f, shader->Program->Parameters);
+      fprintf(f, "*/\n");
+   }
+
+   fclose(f);
+}
+
+
+/**
+ * Append the shader's uniform info/values to the shader log file.
+ * The log file will typically have been created by the
+ * _mesa_write_shader_to_file function.
+ */
+void
+_mesa_append_uniforms_to_file(const struct gl_shader *shader,
+                              const struct gl_program *prog)
+{
+   const char *type;
+   char filename[100];
+   FILE *f;
+
+   if (shader->Type == GL_FRAGMENT_SHADER)
+      type = "frag";
+   else
+      type = "vert";
+
+   snprintf(filename, sizeof(filename), "shader_%u.%s", shader->Name, type);
+   f = fopen(filename, "a"); /* append */
+   if (!f) {
+      fprintf(stderr, "Unable to open %s for appending\n", filename);
+      return;
+   }
+
+   fprintf(f, "/* First-draw parameters / constants */\n");
+   fprintf(f, "/*\n");
+   _mesa_fprint_parameter_list(f, prog->Parameters);
+   fprintf(f, "*/\n");
+
+   fclose(f);
+}
+#endif