ARB prog lexer: Fix lexer to eat both DOS and Unix line endings
[mesa.git] / src / mesa / shader / prog_execute.c
index ef17ed128a79fc6d6a41de3ff27728cd079bda5b..f4beb9a78b62d6b249621b9fabb049cde27094f9 100644 (file)
@@ -1,8 +1,8 @@
 /*
  * Mesa 3-D graphics library
- * Version:  7.0.3
+ * Version:  7.3
  *
- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2008  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"),
@@ -43,7 +43,7 @@
 #include "prog_instruction.h"
 #include "prog_parameter.h"
 #include "prog_print.h"
-#include "shader/slang/slang_library_noise.h"
+#include "prog_noise.h"
 
 
 /* debug predicate */
@@ -76,56 +76,52 @@ static const GLfloat ZeroVec[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
  * source register.
  */
 static INLINE const GLfloat *
-get_register_pointer(const struct prog_src_register *source,
-                     const struct gl_program_machine *machine)
+get_src_register_pointer(const struct prog_src_register *source,
+                         const struct gl_program_machine *machine)
 {
+   const struct gl_program *prog = machine->CurProgram;
+   GLint reg = source->Index;
+
    if (source->RelAddr) {
-      const GLint reg = source->Index + machine->AddressReg[0][0];
-      if (source->File == PROGRAM_ENV_PARAM)
-         if (reg < 0 || reg >= MAX_PROGRAM_ENV_PARAMS)
-            return ZeroVec;
-         else
-            return machine->EnvParams[reg];
-      else {
-         const struct gl_program_parameter_list *params;
-         ASSERT(source->File == PROGRAM_LOCAL_PARAM ||
-                source->File == PROGRAM_CONSTANT ||
-                source->File == PROGRAM_STATE_VAR ||
-                source->File == PROGRAM_UNIFORM);
-         params = machine->CurProgram->Parameters;
-         if (reg < 0 || reg >= (GLint)params->NumParameters)
-            return ZeroVec;
-         else
-            return params->ParameterValues[reg];
+      /* add address register value to src index/offset */
+      reg += machine->AddressReg[0][0];
+      if (reg < 0) {
+         return ZeroVec;
       }
    }
 
    switch (source->File) {
    case PROGRAM_TEMPORARY:
-      ASSERT(source->Index < MAX_PROGRAM_TEMPS);
-      return machine->Temporaries[source->Index];
+      if (reg >= MAX_PROGRAM_TEMPS)
+         return ZeroVec;
+      return machine->Temporaries[reg];
 
    case PROGRAM_INPUT:
-      if (machine->CurProgram->Target == GL_VERTEX_PROGRAM_ARB) {
-         ASSERT(source->Index < VERT_ATTRIB_MAX);
-         return machine->VertAttribs[source->Index];
+      if (prog->Target == GL_VERTEX_PROGRAM_ARB) {
+         if (reg >= VERT_ATTRIB_MAX)
+            return ZeroVec;
+         return machine->VertAttribs[reg];
       }
       else {
-         ASSERT(source->Index < FRAG_ATTRIB_MAX);
-         return machine->Attribs[source->Index][machine->CurElement];
+         if (reg >= FRAG_ATTRIB_MAX)
+            return ZeroVec;
+         return machine->Attribs[reg][machine->CurElement];
       }
 
    case PROGRAM_OUTPUT:
-      ASSERT(source->Index < MAX_PROGRAM_OUTPUTS);
-      return machine->Outputs[source->Index];
+      if (reg >= MAX_PROGRAM_OUTPUTS)
+         return ZeroVec;
+      return machine->Outputs[reg];
 
    case PROGRAM_LOCAL_PARAM:
-      ASSERT(source->Index < MAX_PROGRAM_LOCAL_PARAMS);
-      return machine->CurProgram->LocalParams[source->Index];
+      if (reg >= MAX_PROGRAM_LOCAL_PARAMS)
+         return ZeroVec;
+      return machine->CurProgram->LocalParams[reg];
 
    case PROGRAM_ENV_PARAM:
-      ASSERT(source->Index < MAX_PROGRAM_ENV_PARAMS);
-      return machine->EnvParams[source->Index];
+      if (reg >= MAX_PROGRAM_ENV_PARAMS)
+         return ZeroVec;
+      return machine->EnvParams[reg];
 
    case PROGRAM_STATE_VAR:
       /* Fallthrough */
@@ -134,41 +130,60 @@ get_register_pointer(const struct prog_src_register *source,
    case PROGRAM_UNIFORM:
       /* Fallthrough */
    case PROGRAM_NAMED_PARAM:
-      ASSERT(source->Index <
-             (GLint) machine->CurProgram->Parameters->NumParameters);
-      return machine->CurProgram->Parameters->ParameterValues[source->Index];
+      if (reg >= (GLint) prog->Parameters->NumParameters)
+         return ZeroVec;
+      return prog->Parameters->ParameterValues[reg];
 
    default:
       _mesa_problem(NULL,
-                    "Invalid input register file %d in get_register_pointer()",
-                    source->File);
+         "Invalid src register file %d in get_src_register_pointer()",
+         source->File);
       return NULL;
    }
 }
 
 
-#if FEATURE_MESA_program_debug
-static struct gl_program_machine *CurrentMachine = NULL;
-
 /**
- * For GL_MESA_program_debug.
- * Return current value (4*GLfloat) of a program register.
- * Called via ctx->Driver.GetProgramRegister().
+ * Return a pointer to the 4-element float vector specified by the given
+ * destination register.
  */
-void
-_mesa_get_program_register(GLcontext *ctx, enum register_file file,
-                           GLuint index, GLfloat val[4])
+static INLINE GLfloat *
+get_dst_register_pointer(const struct prog_dst_register *dest,
+                         struct gl_program_machine *machine)
 {
-   if (CurrentMachine) {
-      struct prog_src_register src;
-      const GLfloat *reg;
-      src.File = file;
-      src.Index = index;
-      reg = get_register_pointer(&src, CurrentMachine);
-      COPY_4V(val, reg);
+   static GLfloat dummyReg[4];
+   GLint reg = dest->Index;
+
+   if (dest->RelAddr) {
+      /* add address register value to src index/offset */
+      reg += machine->AddressReg[0][0];
+      if (reg < 0) {
+         return dummyReg;
+      }
+   }
+
+   switch (dest->File) {
+   case PROGRAM_TEMPORARY:
+      if (reg >= MAX_PROGRAM_TEMPS)
+         return dummyReg;
+      return machine->Temporaries[reg];
+
+   case PROGRAM_OUTPUT:
+      if (reg >= MAX_PROGRAM_OUTPUTS)
+         return dummyReg;
+      return machine->Outputs[reg];
+
+   case PROGRAM_WRITE_ONLY:
+      return dummyReg;
+
+   default:
+      _mesa_problem(NULL,
+         "Invalid dest register file %d in get_dst_register_pointer()",
+         dest->File);
+      return NULL;
    }
 }
-#endif /* FEATURE_MESA_program_debug */
+
 
 
 /**
@@ -179,7 +194,7 @@ static void
 fetch_vector4(const struct prog_src_register *source,
               const struct gl_program_machine *machine, GLfloat result[4])
 {
-   const GLfloat *src = get_register_pointer(source, machine);
+   const GLfloat *src = get_src_register_pointer(source, machine);
    ASSERT(src);
 
    if (source->Swizzle == SWIZZLE_NOOP) {
@@ -197,24 +212,26 @@ fetch_vector4(const struct prog_src_register *source,
       result[3] = src[GET_SWZ(source->Swizzle, 3)];
    }
 
-   if (source->NegateBase) {
-      result[0] = -result[0];
-      result[1] = -result[1];
-      result[2] = -result[2];
-      result[3] = -result[3];
-   }
    if (source->Abs) {
       result[0] = FABSF(result[0]);
       result[1] = FABSF(result[1]);
       result[2] = FABSF(result[2]);
       result[3] = FABSF(result[3]);
    }
-   if (source->NegateAbs) {
+   if (source->Negate) {
+      ASSERT(source->Negate == NEGATE_XYZW);
       result[0] = -result[0];
       result[1] = -result[1];
       result[2] = -result[2];
       result[3] = -result[3];
    }
+
+#ifdef NAN_CHECK
+   assert(!IS_INF_OR_NAN(result[0]));
+   assert(!IS_INF_OR_NAN(result[0]));
+   assert(!IS_INF_OR_NAN(result[0]));
+   assert(!IS_INF_OR_NAN(result[0]));
+#endif
 }
 
 
@@ -226,7 +243,7 @@ static void
 fetch_vector4ui(const struct prog_src_register *source,
                 const struct gl_program_machine *machine, GLuint result[4])
 {
-   const GLuint *src = (GLuint *) get_register_pointer(source, machine);
+   const GLuint *src = (GLuint *) get_src_register_pointer(source, machine);
    ASSERT(src);
 
    if (source->Swizzle == SWIZZLE_NOOP) {
@@ -244,7 +261,7 @@ fetch_vector4ui(const struct prog_src_register *source,
       result[3] = src[GET_SWZ(source->Swizzle, 3)];
    }
 
-   /* Note: no NegateBase, Abs, NegateAbs here */
+   /* Note: no Negate or Abs here */
 }
 
 
@@ -284,19 +301,14 @@ fetch_vector4_deriv(GLcontext * ctx,
       result[2] = deriv[GET_SWZ(source->Swizzle, 2)];
       result[3] = deriv[GET_SWZ(source->Swizzle, 3)];
       
-      if (source->NegateBase) {
-         result[0] = -result[0];
-         result[1] = -result[1];
-         result[2] = -result[2];
-         result[3] = -result[3];
-      }
       if (source->Abs) {
          result[0] = FABSF(result[0]);
          result[1] = FABSF(result[1]);
          result[2] = FABSF(result[2]);
          result[3] = FABSF(result[3]);
       }
-      if (source->NegateAbs) {
+      if (source->Negate) {
+         ASSERT(source->Negate == NEGATE_XYZW);
          result[0] = -result[0];
          result[1] = -result[1];
          result[2] = -result[2];
@@ -316,18 +328,15 @@ static void
 fetch_vector1(const struct prog_src_register *source,
               const struct gl_program_machine *machine, GLfloat result[4])
 {
-   const GLfloat *src = get_register_pointer(source, machine);
+   const GLfloat *src = get_src_register_pointer(source, machine);
    ASSERT(src);
 
    result[0] = src[GET_SWZ(source->Swizzle, 0)];
 
-   if (source->NegateBase) {
-      result[0] = -result[0];
-   }
    if (source->Abs) {
       result[0] = FABSF(result[0]);
    }
-   if (source->NegateAbs) {
+   if (source->Negate) {
       result[0] = -result[0];
    }
 }
@@ -431,29 +440,11 @@ static void
 store_vector4(const struct prog_instruction *inst,
               struct gl_program_machine *machine, const GLfloat value[4])
 {
-   const struct prog_dst_register *dest = &(inst->DstReg);
+   const struct prog_dst_register *dstReg = &(inst->DstReg);
    const GLboolean clamp = inst->SaturateMode == SATURATE_ZERO_ONE;
-   GLfloat *dstReg;
-   GLfloat dummyReg[4];
+   GLuint writeMask = dstReg->WriteMask;
    GLfloat clampedValue[4];
-   GLuint writeMask = dest->WriteMask;
-
-   switch (dest->File) {
-   case PROGRAM_OUTPUT:
-      ASSERT(dest->Index < MAX_PROGRAM_OUTPUTS);
-      dstReg = machine->Outputs[dest->Index];
-      break;
-   case PROGRAM_TEMPORARY:
-      ASSERT(dest->Index < MAX_PROGRAM_TEMPS);
-      dstReg = machine->Temporaries[dest->Index];
-      break;
-   case PROGRAM_WRITE_ONLY:
-      dstReg = dummyReg;
-      return;
-   default:
-      _mesa_problem(NULL, "bad register file in store_vector4(fp)");
-      return;
-   }
+   GLfloat *dst = get_dst_register_pointer(dstReg, machine);
 
 #if 0
    if (value[0] > 1.0e10 ||
@@ -471,38 +462,45 @@ store_vector4(const struct prog_instruction *inst,
       value = clampedValue;
    }
 
-   if (dest->CondMask != COND_TR) {
+   if (dstReg->CondMask != COND_TR) {
       /* condition codes may turn off some writes */
       if (writeMask & WRITEMASK_X) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 0)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_X;
       }
       if (writeMask & WRITEMASK_Y) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 1)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_Y;
       }
       if (writeMask & WRITEMASK_Z) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 2)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_Z;
       }
       if (writeMask & WRITEMASK_W) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 3)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_W;
       }
    }
 
+#ifdef NAN_CHECK
+   assert(!IS_INF_OR_NAN(value[0]));
+   assert(!IS_INF_OR_NAN(value[0]));
+   assert(!IS_INF_OR_NAN(value[0]));
+   assert(!IS_INF_OR_NAN(value[0]));
+#endif
+
    if (writeMask & WRITEMASK_X)
-      dstReg[0] = value[0];
+      dst[0] = value[0];
    if (writeMask & WRITEMASK_Y)
-      dstReg[1] = value[1];
+      dst[1] = value[1];
    if (writeMask & WRITEMASK_Z)
-      dstReg[2] = value[2];
+      dst[2] = value[2];
    if (writeMask & WRITEMASK_W)
-      dstReg[3] = value[3];
+      dst[3] = value[3];
 
    if (inst->CondUpdate) {
       if (writeMask & WRITEMASK_X)
@@ -531,60 +529,42 @@ static void
 store_vector4ui(const struct prog_instruction *inst,
                 struct gl_program_machine *machine, const GLuint value[4])
 {
-   const struct prog_dst_register *dest = &(inst->DstReg);
-   GLuint *dstReg;
-   GLuint dummyReg[4];
-   GLuint writeMask = dest->WriteMask;
+   const struct prog_dst_register *dstReg = &(inst->DstReg);
+   GLuint writeMask = dstReg->WriteMask;
+   GLuint *dst = (GLuint *) get_dst_register_pointer(dstReg, machine);
 
-   switch (dest->File) {
-   case PROGRAM_OUTPUT:
-      ASSERT(dest->Index < MAX_PROGRAM_OUTPUTS);
-      dstReg = (GLuint *) machine->Outputs[dest->Index];
-      break;
-   case PROGRAM_TEMPORARY:
-      ASSERT(dest->Index < MAX_PROGRAM_TEMPS);
-      dstReg = (GLuint *) machine->Temporaries[dest->Index];
-      break;
-   case PROGRAM_WRITE_ONLY:
-      dstReg = dummyReg;
-      return;
-   default:
-      _mesa_problem(NULL, "bad register file in store_vector4(fp)");
-      return;
-   }
-
-   if (dest->CondMask != COND_TR) {
+   if (dstReg->CondMask != COND_TR) {
       /* condition codes may turn off some writes */
       if (writeMask & WRITEMASK_X) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 0)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_X;
       }
       if (writeMask & WRITEMASK_Y) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 1)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_Y;
       }
       if (writeMask & WRITEMASK_Z) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 2)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_Z;
       }
       if (writeMask & WRITEMASK_W) {
-         if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 3)],
-                      dest->CondMask))
+         if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)],
+                      dstReg->CondMask))
             writeMask &= ~WRITEMASK_W;
       }
    }
 
    if (writeMask & WRITEMASK_X)
-      dstReg[0] = value[0];
+      dst[0] = value[0];
    if (writeMask & WRITEMASK_Y)
-      dstReg[1] = value[1];
+      dst[1] = value[1];
    if (writeMask & WRITEMASK_Z)
-      dstReg[2] = value[2];
+      dst[2] = value[2];
    if (writeMask & WRITEMASK_W)
-      dstReg[3] = value[3];
+      dst[3] = value[3];
 
    if (inst->CondUpdate) {
       if (writeMask & WRITEMASK_X)
@@ -630,10 +610,6 @@ _mesa_execute_program(GLcontext * ctx,
       printf("execute program %u --------------------\n", program->Id);
    }
 
-#if FEATURE_MESA_program_debug
-   CurrentMachine = machine;
-#endif
-
    if (program->Target == GL_VERTEX_PROGRAM_ARB) {
       machine->EnvParams = ctx->VertexProgram.Parameters;
    }
@@ -644,15 +620,6 @@ _mesa_execute_program(GLcontext * ctx,
    for (pc = 0; pc < numInst; pc++) {
       const struct prog_instruction *inst = program->Instructions + pc;
 
-#if FEATURE_MESA_program_debug
-      if (ctx->FragmentProgram.CallbackEnabled &&
-          ctx->FragmentProgram.Callback) {
-         ctx->FragmentProgram.CurrentPosition = inst->StringPos;
-         ctx->FragmentProgram.Callback(program->Target,
-                                       ctx->FragmentProgram.CallbackData);
-      }
-#endif
-
       if (DEBUG_PROG) {
          _mesa_print_instruction(inst);
       }
@@ -702,7 +669,7 @@ _mesa_execute_program(GLcontext * ctx,
          {
             GLfloat t[4];
             fetch_vector4(&inst->SrcReg[0], machine, t);
-            machine->AddressReg[0][0] = (GLint) FLOORF(t[0]);
+            machine->AddressReg[0][0] = IFLOOR(t[0]);
          }
          break;
       case OPCODE_BGNLOOP:
@@ -870,7 +837,7 @@ _mesa_execute_program(GLcontext * ctx,
                 * result.z = result.x * APPX(result.y)
                 * We do what the ARB extension says.
                 */
-               q[2] = (GLfloat) pow(2.0, t[0]);
+               q[2] = (GLfloat) _mesa_pow(2.0, t[0]);
             }
             q[1] = t[0] - floor_t0;
             q[3] = 1.0F;
@@ -879,10 +846,14 @@ _mesa_execute_program(GLcontext * ctx,
          break;
       case OPCODE_EX2:         /* Exponential base 2 */
          {
-            GLfloat a[4], result[4];
+            GLfloat a[4], result[4], val;
             fetch_vector1(&inst->SrcReg[0], machine, a);
-            result[0] = result[1] = result[2] = result[3] =
-               (GLfloat) _mesa_pow(2.0, a[0]);
+            val = (GLfloat) _mesa_pow(2.0, a[0]);
+            /*
+            if (IS_INF_OR_NAN(val))
+               val = 1.0e10;
+            */
+            result[0] = result[1] = result[2] = result[3] = val;
             store_vector4(inst, machine, result);
          }
          break;
@@ -958,9 +929,17 @@ _mesa_execute_program(GLcontext * ctx,
          break;
       case OPCODE_LG2:         /* log base 2 */
          {
-            GLfloat a[4], result[4];
+            GLfloat a[4], result[4], val;
             fetch_vector1(&inst->SrcReg[0], machine, a);
-            result[0] = result[1] = result[2] = result[3] = LOG2(a[0]);
+           /* The fast LOG2 macro doesn't meet the precision requirements.
+            */
+            if (a[0] == 0.0F) {
+               val = 0.0F;
+            }
+            else {
+               val = log(a[0]) * 1.442695F;
+            }
+            result[0] = result[1] = result[2] = result[3] = val;
             store_vector4(inst, machine, result);
          }
          break;
@@ -980,7 +959,7 @@ _mesa_execute_program(GLcontext * ctx,
                if (a[1] == 0.0 && a[3] == 0.0)
                   result[2] = 1.0;
                else
-                  result[2] = EXPF(a[3] * LOGF(a[1]));
+                  result[2] = (GLfloat) _mesa_pow(a[1], a[3]);
             }
             else {
                result[2] = 0.0;
@@ -1019,7 +998,11 @@ _mesa_execute_program(GLcontext * ctx,
                   GLfloat mantissa = FREXPF(t[0], &exponent);
                   q[0] = (GLfloat) (exponent - 1);
                   q[1] = (GLfloat) (2.0 * mantissa); /* map [.5, 1) -> [1, 2) */
-                  q[2] = (GLfloat) (q[0] + LOG2(q[1]));
+
+                 /* The fast LOG2 macro doesn't meet the precision
+                  * requirements.
+                  */
+                  q[2] = (log(t[0]) * 1.442695F);
                }
             }
             else {
@@ -1134,7 +1117,8 @@ _mesa_execute_program(GLcontext * ctx,
             fetch_vector1(&inst->SrcReg[0], machine, a);
             result[0] =
                result[1] =
-               result[2] = result[3] = _slang_library_noise1(a[0]);
+               result[2] =
+               result[3] = _mesa_noise1(a[0]);
             store_vector4(inst, machine, result);
          }
          break;
@@ -1144,7 +1128,7 @@ _mesa_execute_program(GLcontext * ctx,
             fetch_vector4(&inst->SrcReg[0], machine, a);
             result[0] =
                result[1] =
-               result[2] = result[3] = _slang_library_noise2(a[0], a[1]);
+               result[2] = result[3] = _mesa_noise2(a[0], a[1]);
             store_vector4(inst, machine, result);
          }
          break;
@@ -1155,7 +1139,7 @@ _mesa_execute_program(GLcontext * ctx,
             result[0] =
                result[1] =
                result[2] =
-               result[3] = _slang_library_noise3(a[0], a[1], a[2]);
+               result[3] = _mesa_noise3(a[0], a[1], a[2]);
             store_vector4(inst, machine, result);
          }
          break;
@@ -1166,7 +1150,7 @@ _mesa_execute_program(GLcontext * ctx,
             result[0] =
                result[1] =
                result[2] =
-               result[3] = _slang_library_noise4(a[0], a[1], a[2], a[3]);
+               result[3] = _mesa_noise4(a[0], a[1], a[2], a[3]);
             store_vector4(inst, machine, result);
          }
          break;
@@ -1190,7 +1174,7 @@ _mesa_execute_program(GLcontext * ctx,
             fetch_vector4(&inst->SrcReg[0], machine, a);
             tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2];
             if (tmp != 0.0F)
-               tmp = 1.0F / tmp;
+               tmp = INV_SQRTF(tmp);
             result[0] = tmp * a[0];
             result[1] = tmp * a[1];
             result[2] = tmp * a[2];
@@ -1205,7 +1189,7 @@ _mesa_execute_program(GLcontext * ctx,
             fetch_vector4(&inst->SrcReg[0], machine, a);
             tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3];
             if (tmp != 0.0F)
-               tmp = 1.0F / tmp;
+               tmp = INV_SQRTF(tmp);
             result[0] = tmp * a[0];
             result[1] = tmp * a[1];
             result[2] = tmp * a[2];
@@ -1526,7 +1510,7 @@ _mesa_execute_program(GLcontext * ctx,
       case OPCODE_SWZ:         /* extended swizzle */
          {
             const struct prog_src_register *source = &inst->SrcReg[0];
-            const GLfloat *src = get_register_pointer(source, machine);
+            const GLfloat *src = get_src_register_pointer(source, machine);
             GLfloat result[4];
             GLuint i;
             for (i = 0; i < 4; i++) {
@@ -1540,7 +1524,7 @@ _mesa_execute_program(GLcontext * ctx,
                   ASSERT(swz <= 3);
                   result[i] = src[swz];
                }
-               if (source->NegateBase & (1 << i))
+               if (source->Negate & (1 << i))
                   result[i] = -result[i];
             }
             store_vector4(inst, machine, result);
@@ -1566,8 +1550,8 @@ _mesa_execute_program(GLcontext * ctx,
       case OPCODE_TXB:         /* GL_ARB_fragment_program only */
          /* Texel lookup with LOD bias */
          {
-            const struct gl_texture_unit *texUnit
-               = &ctx->Texture.Unit[inst->TexSrcUnit];
+            const GLuint unit = machine->Samplers[inst->TexSrcUnit];
+            const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
             GLfloat texcoord[4], color[4], lodBias;
 
             fetch_vector4(&inst->SrcReg[0], machine, texcoord);
@@ -1769,9 +1753,5 @@ _mesa_execute_program(GLcontext * ctx,
 
    } /* for pc */
 
-#if FEATURE_MESA_program_debug
-   CurrentMachine = NULL;
-#endif
-
    return GL_TRUE;
 }