diff --git a/src/mesa/main/ff_fragment_shader.cpp b/src/mesa/main/ff_fragment_shader.cpp
index 0b53c28f7ae..2ccbaf8f8c3 100644
--- a/src/mesa/main/ff_fragment_shader.cpp
+++ b/src/mesa/main/ff_fragment_shader.cpp
@@ -875,7 +875,8 @@ static struct ureg register_const4f( struct texenv_fragment_program *p,
    values[1] = s1;
    values[2] = s2;
    values[3] = s3;
-   idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
+   idx = _mesa_add_unnamed_constant( p->program->Base.Parameters,
+                                     (gl_constant_value *) values, 4,
                                      &swizzle );
    r = make_ureg(PROGRAM_CONSTANT, idx);
    r.swz = swizzle;
diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index b8e49a3757f..2d2485c9e06 100644
--- a/src/mesa/main/ffvertex_prog.c
+++ b/src/mesa/main/ffvertex_prog.c
@@ -455,13 +455,13 @@ static struct ureg register_const4f( struct tnl_program *p,
 			      GLfloat s2,
 			      GLfloat s3)
 {
-   GLfloat values[4];
+   gl_constant_value values[4];
    GLint idx;
    GLuint swizzle;
-   values[0] = s0;
-   values[1] = s1;
-   values[2] = s2;
-   values[3] = s3;
+   values[0].f = s0;
+   values[1].f = s1;
+   values[2].f = s2;
+   values[3].f = s3;
    idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
                                      &swizzle );
    ASSERT(swizzle == SWIZZLE_NOOP);
diff --git a/src/mesa/main/uniforms.c b/src/mesa/main/uniforms.c
index f984ce3bc56..b41968b42f0 100644
--- a/src/mesa/main/uniforms.c
+++ b/src/mesa/main/uniforms.c
@@ -434,7 +434,7 @@ _mesa_get_uniformfv(struct gl_context *ctx, GLuint program, GLint location,
 	 const int base = paramPos + offset + i;
 
          for (j = 0; j < cols; j++ ) {
-            params[k++] = prog->Parameters->ParameterValues[base][j];
+            params[k++] = prog->Parameters->ParameterValues[base][j].f;
          }
       }
    }
@@ -469,7 +469,7 @@ _mesa_get_uniformiv(struct gl_context *ctx, GLuint program, GLint location,
 	 const int base = paramPos + offset + i;
 
          for (j = 0; j < cols; j++ ) {
-            params[k++] = (GLint) prog->Parameters->ParameterValues[base][j];
+            params[k++] = (GLint) prog->Parameters->ParameterValues[base][j].f;
          }
       }
    }
@@ -505,7 +505,7 @@ _mesa_get_uniformuiv(struct gl_context *ctx, GLuint program, GLint location,
 	 const int base = paramPos + offset + i;
 
          for (j = 0; j < cols; j++ ) {
-            params[k++] = (GLuint) prog->Parameters->ParameterValues[base][j];
+            params[k++] = (GLuint) prog->Parameters->ParameterValues[base][j].f;
          }
       }
    }
@@ -701,7 +701,7 @@ set_program_uniform(struct gl_context *ctx, struct gl_program *program,
       /* loop over number of samplers to change */
       for (i = 0; i < count; i++) {
          GLuint sampler =
-            (GLuint) program->Parameters->ParameterValues[index + offset + i][0];
+            (GLuint)program->Parameters->ParameterValues[index+offset + i][0].f;
          GLuint texUnit = ((GLuint *) values)[i];
 
          /* check that the sampler (tex unit index) is legal */
@@ -960,7 +960,7 @@ set_program_uniform_matrix(struct gl_context *ctx, struct gl_program *program,
             /* Ignore writes beyond the end of (the used part of) an array */
             return;
          }
-         v = program->Parameters->ParameterValues[index + offset];
+         v = (GLfloat *) program->Parameters->ParameterValues[index + offset];
          for (row = 0; row < rows; row++) {
             if (transpose) {
                v[row] = values[src + row * cols + col];
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 3c9b9733832..7a61fd399d4 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -599,7 +599,7 @@ ir_to_mesa_visitor::src_reg_for_float(float val)
    src_reg src(PROGRAM_CONSTANT, -1, NULL);
 
    src.index = _mesa_add_unnamed_constant(this->prog->Parameters,
-					  &val, 1, &src.swizzle);
+					  (const gl_constant_value *)&val, 1, &src.swizzle);
 
    return src;
 }
@@ -1799,7 +1799,7 @@ ir_to_mesa_visitor::visit(ir_constant *ir)
 
 	 src = src_reg(PROGRAM_CONSTANT, -1, NULL);
 	 src.index = _mesa_add_unnamed_constant(this->prog->Parameters,
-						values,
+						(gl_constant_value *) values,
 						ir->type->vector_elements,
 						&src.swizzle);
 	 emit(ir, OPCODE_MOV, mat_column, src);
@@ -1837,7 +1837,7 @@ ir_to_mesa_visitor::visit(ir_constant *ir)
 
    this->result = src_reg(PROGRAM_CONSTANT, -1, ir->type);
    this->result.index = _mesa_add_unnamed_constant(this->prog->Parameters,
-						   values,
+						   (gl_constant_value *) values,
 						   ir->type->vector_elements,
 						   &this->result.swizzle);
 }
@@ -2525,7 +2525,7 @@ add_uniforms_to_parameters_list(struct gl_shader_program *shader_program,
 	  */
 	 if (file == PROGRAM_SAMPLER) {
 	    for (unsigned int j = 0; j < size / 4; j++)
-	       prog->Parameters->ParameterValues[index + j][0] = next_sampler++;
+	       prog->Parameters->ParameterValues[index + j][0].f = next_sampler++;
 	 }
 
 	 /* The location chosen in the Parameters list here (returned
diff --git a/src/mesa/program/nvfragparse.c b/src/mesa/program/nvfragparse.c
index 8516b5fc1ff..ce72c610d89 100644
--- a/src/mesa/program/nvfragparse.c
+++ b/src/mesa/program/nvfragparse.c
@@ -472,8 +472,9 @@ Parse_ScalarConstant(struct parse_state *parseState, GLfloat *number)
       const GLfloat *constant;
       if (!Parse_Identifier(parseState, ident))
          RETURN_ERROR1("Expected an identifier");
-      constant = _mesa_lookup_parameter_value(parseState->parameters,
-                                              -1, (const char *) ident);
+      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");
@@ -1039,7 +1040,8 @@ Parse_VectorSrc(struct parse_state *parseState,
       if (!Parse_ScalarConstant(parseState, values))
          RETURN_ERROR;
       paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
+                                              (gl_constant_value *) values,
+                                              4, NULL);
       srcReg->File = PROGRAM_NAMED_PARAM;
       srcReg->Index = paramIndex;
    }
@@ -1051,7 +1053,8 @@ Parse_VectorSrc(struct parse_state *parseState,
       if (!Parse_VectorConstant(parseState, values))
          RETURN_ERROR;
       paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
+                                              (gl_constant_value *) values,
+                                              4, NULL);
       srcReg->File = PROGRAM_NAMED_PARAM;
       srcReg->Index = paramIndex;      
    }
@@ -1145,7 +1148,8 @@ Parse_ScalarSrcReg(struct parse_state *parseState,
       if (!Parse_VectorConstant(parseState, values))
          RETURN_ERROR;
       paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
+                                              (gl_constant_value *) values,
+                                              4, NULL);
       srcReg->File = PROGRAM_NAMED_PARAM;
       srcReg->Index = paramIndex;      
    }
@@ -1170,7 +1174,8 @@ Parse_ScalarSrcReg(struct parse_state *parseState,
       if (!Parse_ScalarConstant(parseState, values))
          RETURN_ERROR;
       paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
+                                              (gl_constant_value *) values,
+                                              4, NULL);
       srcReg->Index = paramIndex;      
       srcReg->File = PROGRAM_NAMED_PARAM;
       needSuffix = GL_FALSE;
@@ -1296,7 +1301,8 @@ Parse_InstructionSequence(struct parse_state *parseState,
             RETURN_ERROR2(id, "already defined");
          }
          _mesa_add_named_parameter(parseState->parameters,
-                                   (const char *) id, value);
+                                   (const char *) id,
+                                   (gl_constant_value *) value);
       }
       else if (Parse_String(parseState, "DECLARE")) {
          GLubyte id[100];
@@ -1315,7 +1321,8 @@ Parse_InstructionSequence(struct parse_state *parseState,
             RETURN_ERROR2(id, "already declared");
          }
          _mesa_add_named_parameter(parseState->parameters,
-                                   (const char *) id, value);
+                                   (const char *) id,
+                                   (gl_constant_value *) value);
       }
       else if (Parse_String(parseState, "END")) {
          inst->Opcode = OPCODE_END;
diff --git a/src/mesa/program/prog_execute.c b/src/mesa/program/prog_execute.c
index e7553c69dbe..dbfd1b91875 100644
--- a/src/mesa/program/prog_execute.c
+++ b/src/mesa/program/prog_execute.c
@@ -157,7 +157,7 @@ get_src_register_pointer(const struct prog_src_register *source,
    case PROGRAM_NAMED_PARAM:
       if (reg >= (GLint) prog->Parameters->NumParameters)
          return ZeroVec;
-      return prog->Parameters->ParameterValues[reg];
+      return (GLfloat *) prog->Parameters->ParameterValues[reg];
 
    case PROGRAM_SYSTEM_VALUE:
       assert(reg < Elements(machine->SystemValues));
diff --git a/src/mesa/program/prog_parameter.c b/src/mesa/program/prog_parameter.c
index 3570cab118b..b1cdf8bf2c0 100644
--- a/src/mesa/program/prog_parameter.c
+++ b/src/mesa/program/prog_parameter.c
@@ -56,8 +56,8 @@ _mesa_new_parameter_list_sized(unsigned size)
       p->Parameters = (struct gl_program_parameter *)
 	 calloc(1, size * sizeof(struct gl_program_parameter));
 
-      p->ParameterValues = (GLfloat (*)[4])
-         _mesa_align_malloc(size * 4 *sizeof(GLfloat), 16);
+      p->ParameterValues = (gl_constant_value (*)[4])
+         _mesa_align_malloc(size * 4 *sizeof(gl_constant_value), 16);
 
 
       if ((p->Parameters == NULL) || (p->ParameterValues == NULL)) {
@@ -101,14 +101,15 @@ _mesa_free_parameter_list(struct gl_program_parameter_list *paramList)
  * \param name  the parameter name, will be duplicated/copied!
  * \param size  number of elements in 'values' vector (1..4, or more)
  * \param datatype  GL_FLOAT, GL_FLOAT_VECx, GL_INT, GL_INT_VECx or GL_NONE.
- * \param values  initial parameter value, up to 4 GLfloats, or NULL
+ * \param values  initial parameter value, up to 4 gl_constant_values, or NULL
  * \param state  state indexes, or NULL
  * \return  index of new parameter in the list, or -1 if error (out of mem)
  */
 GLint
 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
                     gl_register_file type, const char *name,
-                    GLuint size, GLenum datatype, const GLfloat *values,
+                    GLuint size, GLenum datatype,
+                    const gl_constant_value *values,
                     const gl_state_index state[STATE_LENGTH],
                     GLbitfield flags)
 {
@@ -127,10 +128,10 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
 		       oldNum * sizeof(struct gl_program_parameter),
 		       paramList->Size * sizeof(struct gl_program_parameter));
 
-      paramList->ParameterValues = (GLfloat (*)[4])
+      paramList->ParameterValues = (gl_constant_value (*)[4])
          _mesa_align_realloc(paramList->ParameterValues,         /* old buf */
-                             oldNum * 4 * sizeof(GLfloat),      /* old size */
-                             paramList->Size * 4 *sizeof(GLfloat), /* new sz */
+                             oldNum * 4 * sizeof(gl_constant_value),/* old sz */
+                             paramList->Size*4*sizeof(gl_constant_value),/*new*/
                              16);
    }
 
@@ -142,7 +143,7 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
       return -1;
    }
    else {
-      GLuint i;
+      GLuint i, j;
 
       paramList->NumParameters = oldNum + sz4;
 
@@ -163,7 +164,8 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
          }
          else {
             /* silence valgrind */
-            ASSIGN_4V(paramList->ParameterValues[oldNum + i], 0, 0, 0, 0);
+            for (j = 0; j < 4; j++)
+            	paramList->ParameterValues[oldNum + i][j].f = 0;
          }
          size -= 4;
       }
@@ -184,7 +186,7 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
  */
 GLint
 _mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
-                          const char *name, const GLfloat values[4])
+                          const char *name, const gl_constant_value values[4])
 {
    return _mesa_add_parameter(paramList, PROGRAM_NAMED_PARAM, name,
                               4, GL_NONE, values, NULL, 0x0);
@@ -204,17 +206,17 @@ _mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
  */
 GLint
 _mesa_add_named_constant(struct gl_program_parameter_list *paramList,
-                         const char *name, const GLfloat values[4],
+                         const char *name, const gl_constant_value values[4],
                          GLuint size)
 {
    /* first check if this is a duplicate constant */
    GLint pos;
    for (pos = 0; pos < (GLint)paramList->NumParameters; pos++) {
-      const GLfloat *pvals = paramList->ParameterValues[pos];
-      if (pvals[0] == values[0] &&
-          pvals[1] == values[1] &&
-          pvals[2] == values[2] &&
-          pvals[3] == values[3] &&
+      const gl_constant_value *pvals = paramList->ParameterValues[pos];
+      if (pvals[0].u == values[0].u &&
+          pvals[1].u == values[1].u &&
+          pvals[2].u == values[2].u &&
+          pvals[3].u == values[3].u &&
           strcmp(paramList->Parameters[pos].Name, name) == 0) {
          /* Same name and value is already in the param list - reuse it */
          return pos;
@@ -240,7 +242,7 @@ _mesa_add_named_constant(struct gl_program_parameter_list *paramList,
  */
 GLint
 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
-                           const GLfloat values[4], GLuint size,
+                           const gl_constant_value values[4], GLuint size,
                            GLuint *swizzleOut)
 {
    GLint pos;
@@ -262,7 +264,7 @@ _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
          struct gl_program_parameter *p = paramList->Parameters + pos;
          if (p->Type == PROGRAM_CONSTANT && p->Size + size <= 4) {
             /* ok, found room */
-            GLfloat *pVal = paramList->ParameterValues[pos];
+            gl_constant_value *pVal = paramList->ParameterValues[pos];
             GLuint swz = p->Size; /* 1, 2 or 3 for Y, Z, W */
             pVal[p->Size] = values[0];
             p->Size++;
@@ -401,7 +403,7 @@ _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
  * Lookup a parameter value by name in the given parameter list.
  * \return pointer to the float[4] values.
  */
-GLfloat *
+gl_constant_value *
 _mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
                              GLsizei nameLen, const char *name)
 {
@@ -465,7 +467,7 @@ _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
  */
 GLboolean
 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
-                                const GLfloat v[], GLuint vSize,
+                                const gl_constant_value v[], GLuint vSize,
                                 GLint *posOut, GLuint *swizzleOut)
 {
    GLuint i;
@@ -484,7 +486,7 @@ _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
             /* swizzle not allowed */
             GLuint j, match = 0;
             for (j = 0; j < vSize; j++) {
-               if (v[j] == list->ParameterValues[i][j])
+               if (v[j].u == list->ParameterValues[i][j].u)
                   match++;
             }
             if (match == vSize) {
@@ -498,7 +500,7 @@ _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
                 /* look for v[0] anywhere within float[4] value */
                 GLuint j;
                 for (j = 0; j < list->Parameters[i].Size; j++) {
-                   if (list->ParameterValues[i][j] == v[0]) {
+                   if (list->ParameterValues[i][j].u == v[0].u) {
                       /* found it */
                       *posOut = i;
                       *swizzleOut = MAKE_SWIZZLE4(j, j, j, j);
@@ -511,13 +513,13 @@ _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
                 GLuint swz[4];
                 GLuint match = 0, j, k;
                 for (j = 0; j < vSize; j++) {
-                   if (v[j] == list->ParameterValues[i][j]) {
+                   if (v[j].u == list->ParameterValues[i][j].u) {
                       swz[j] = j;
                       match++;
                    }
                    else {
                       for (k = 0; k < list->Parameters[i].Size; k++) {
-                         if (v[j] == list->ParameterValues[i][k]) {
+                         if (v[j].u == list->ParameterValues[i][k].u) {
                             swz[j] = k;
                             match++;
                             break;
diff --git a/src/mesa/program/prog_parameter.h b/src/mesa/program/prog_parameter.h
index 10cbbe57a6c..dcc171ed745 100644
--- a/src/mesa/program/prog_parameter.h
+++ b/src/mesa/program/prog_parameter.h
@@ -46,7 +46,15 @@
 #define PROG_PARAM_BIT_CYL_WRAP  0x10  /**< XXX gallium debug */
 /*@}*/
 
-
+/**
+ * Actual data for constant values of parameters.
+ */
+typedef union gl_constant_value {
+	GLfloat f;
+	GLboolean b;
+	GLint i;
+	GLuint u;
+} gl_constant_value;
 
 /**
  * Program parameter.
@@ -81,7 +89,7 @@ struct gl_program_parameter_list
    GLuint Size;           /**< allocated size of Parameters, ParameterValues */
    GLuint NumParameters;  /**< number of parameters in arrays */
    struct gl_program_parameter *Parameters; /**< Array [Size] */
-   GLfloat (*ParameterValues)[4];        /**< Array [Size] of GLfloat[4] */
+   gl_constant_value (*ParameterValues)[4]; /**< Array [Size] of constant[4] */
    GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
                                might invalidate ParameterValues[] */
 };
@@ -112,22 +120,23 @@ _mesa_num_parameters(const struct gl_program_parameter_list *list)
 extern GLint
 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
                     gl_register_file type, const char *name,
-                    GLuint size, GLenum datatype, const GLfloat *values,
+                    GLuint size, GLenum datatype,
+                    const gl_constant_value *values,
                     const gl_state_index state[STATE_LENGTH],
                     GLbitfield flags);
 
 extern GLint
 _mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
-                          const char *name, const GLfloat values[4]);
+                          const char *name, const gl_constant_value values[4]);
 
 extern GLint
 _mesa_add_named_constant(struct gl_program_parameter_list *paramList,
-                         const char *name, const GLfloat values[4],
+                         const char *name, const gl_constant_value values[4],
                          GLuint size);
 
 extern GLint
 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
-                           const GLfloat values[4], GLuint size,
+                           const gl_constant_value values[4], GLuint size,
                            GLuint *swizzleOut);
 
 extern GLint
@@ -143,7 +152,7 @@ extern GLint
 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
                           const gl_state_index stateTokens[STATE_LENGTH]);
 
-extern GLfloat *
+extern gl_constant_value *
 _mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
                              GLsizei nameLen, const char *name);
 
@@ -153,7 +162,7 @@ _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
 
 extern GLboolean
 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
-                                const GLfloat v[], GLuint vSize,
+                                const gl_constant_value v[], GLuint vSize,
                                 GLint *posOut, GLuint *swizzleOut);
 
 extern GLuint
diff --git a/src/mesa/program/prog_parameter_layout.c b/src/mesa/program/prog_parameter_layout.c
index d7dc97edbfb..e34a50e0f71 100644
--- a/src/mesa/program/prog_parameter_layout.c
+++ b/src/mesa/program/prog_parameter_layout.c
@@ -182,7 +182,7 @@ _mesa_layout_parameters(struct asm_parser_state *state)
 
 	 switch (p->Type) {
 	 case PROGRAM_CONSTANT: {
-	    const float *const v =
+	    const gl_constant_value *const v =
 	       state->prog->Parameters->ParameterValues[idx];
 
 	    inst->Base.SrcReg[i].Index =
diff --git a/src/mesa/program/prog_print.c b/src/mesa/program/prog_print.c
index 484596af760..190600ece9d 100644
--- a/src/mesa/program/prog_print.c
+++ b/src/mesa/program/prog_print.c
@@ -978,7 +978,7 @@ _mesa_fprint_parameter_list(FILE *f,
    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];
+      const GLfloat *v = (GLfloat *) list->ParameterValues[i];
       fprintf(f, "param[%d] sz=%d %s %s = {%.3g, %.3g, %.3g, %.3g}",
 	      i, param->Size,
 	      _mesa_register_file_name(list->Parameters[i].Type),
diff --git a/src/mesa/program/program.c b/src/mesa/program/program.c
index 224446a2683..4f2b6270501 100644
--- a/src/mesa/program/program.c
+++ b/src/mesa/program/program.c
@@ -1030,7 +1030,8 @@ _mesa_postprocess_program(struct gl_context *ctx, struct gl_program *prog)
    GLuint i;
    GLuint whiteSwizzle;
    GLint whiteIndex = _mesa_add_unnamed_constant(prog->Parameters,
-                                                 white, 4, &whiteSwizzle);
+                                                 (gl_constant_value *) white,
+                                                 4, &whiteSwizzle);
 
    (void) whiteIndex;
 
diff --git a/src/mesa/program/sampler.cpp b/src/mesa/program/sampler.cpp
index 1457d1199fa..e8d34c670a9 100644
--- a/src/mesa/program/sampler.cpp
+++ b/src/mesa/program/sampler.cpp
@@ -132,6 +132,6 @@ _mesa_get_sampler_uniform_value(class ir_dereference *sampler,
 
    index += getname.offset;
 
-   return prog->Parameters->ParameterValues[index][0];
+   return prog->Parameters->ParameterValues[index][0].f;
 }
 }
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 75ab9c5de7c..881b9e05de1 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -706,9 +706,11 @@ struct st_src_reg
 glsl_to_tgsi_visitor::st_src_reg_for_float(float val)
 {
    st_src_reg src(PROGRAM_CONSTANT, -1, NULL);
+   union gl_constant_value uval;
 
+   uval.f = val;
    src.index = _mesa_add_unnamed_constant(this->prog->Parameters,
-        				  &val, 1, &src.swizzle);
+        				  &uval, 1, &src.swizzle);
 
    return src;
 }
@@ -1791,7 +1793,7 @@ glsl_to_tgsi_visitor::visit(ir_constant *ir)
 
          src = st_src_reg(PROGRAM_CONSTANT, -1, NULL);
          src.index = _mesa_add_unnamed_constant(this->prog->Parameters,
-        					values,
+        					(gl_constant_value *) values,
         					ir->type->vector_elements,
         					&src.swizzle);
          emit(ir, TGSI_OPCODE_MOV, mat_column, src);
@@ -1829,7 +1831,7 @@ glsl_to_tgsi_visitor::visit(ir_constant *ir)
 
    this->result = st_src_reg(PROGRAM_CONSTANT, -1, ir->type);
    this->result.index = _mesa_add_unnamed_constant(this->prog->Parameters,
-        					   values,
+        					   (gl_constant_value *) values,
         					   ir->type->vector_elements,
         					   &this->result.swizzle);
 }
@@ -2401,7 +2403,7 @@ add_uniforms_to_parameters_list(struct gl_shader_program *shader_program,
           */
          if (file == PROGRAM_SAMPLER) {
             for (unsigned int j = 0; j < size / 4; j++)
-               prog->Parameters->ParameterValues[index + j][0] = next_sampler++;
+               prog->Parameters->ParameterValues[index + j][0].f = next_sampler++;
          }
 
          /* The location chosen in the Parameters list here (returned
@@ -3762,7 +3764,7 @@ st_translate_program(
             else
                t->constants[i] = 
                   ureg_DECL_immediate( ureg,
-                                       proginfo->Parameters->ParameterValues[i],
+                                       (GLfloat *) proginfo->Parameters->ParameterValues[i],
                                        4 );
             break;
          default: