mesa: rework ParameterList to allow packing

Currently everything is padded to 4 components. Making the list
more flexible will allow us to do uniform packing.

V2 (suggestions from Nicolai):
- always pass existing calls to _mesa_add_parameter() true for padd_and_align
- fix bindless param value offsets
- remove left over wip logic from pad and align code
- zero out param value padding
- whitespace fix

Reviewed-by: Marek Olšák <[email protected]>

18 files changed, 114 insertions, 57 deletions

diff --git a/src/mesa/drivers/dri/i915/i915_fragprog.c b/src/mesa/drivers/dri/i915/i915_fragprog.c
index 2e043195121..6493ab99b1e 100644
--- a/src/mesa/drivers/dri/i915/i915_fragprog.c
+++ b/src/mesa/drivers/dri/i915/i915_fragprog.c
@@ -184,11 +184,12 @@ src_vector(struct i915_fragment_program *p,
        */
    case PROGRAM_CONSTANT:
    case PROGRAM_STATE_VAR:
-   case PROGRAM_UNIFORM:
-      src = i915_emit_param4fv(p,
-	 &program->Parameters->ParameterValues[source->Index][0].f);
+   case PROGRAM_UNIFORM: {
+      struct gl_program_parameter_list *params = program->Parameters;
+      unsigned offset = params->ParameterValueOffset[source->Index];
+      src = i915_emit_param4fv(p, &params->ParameterValues[offset].f);
       break;
-
+   }
    default:
       i915_program_error(p, "Bad source->File: %d", source->File);
       return 0;
diff --git a/src/mesa/drivers/dri/i965/gen6_constant_state.c b/src/mesa/drivers/dri/i965/gen6_constant_state.c
index afcd2bebd76..919aee49ade 100644
--- a/src/mesa/drivers/dri/i965/gen6_constant_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_constant_state.c
@@ -68,9 +68,10 @@ brw_param_value(struct brw_context *brw,
 
    case BRW_PARAM_DOMAIN_PARAMETER: {
       unsigned idx = BRW_PARAM_PARAMETER_IDX(param);
+      unsigned offset = prog->Parameters->ParameterValueOffset[idx];
       unsigned comp = BRW_PARAM_PARAMETER_COMP(param);
       assert(idx < prog->Parameters->NumParameters);
-      return prog->Parameters->ParameterValues[idx][comp].u;
+      return prog->Parameters->ParameterValues[offset + comp].u;
    }
 
    case BRW_PARAM_DOMAIN_UNIFORM: {
diff --git a/src/mesa/drivers/dri/r200/r200_vertprog.c b/src/mesa/drivers/dri/r200/r200_vertprog.c
index 8599e478815..f69f4a0a1e2 100644
--- a/src/mesa/drivers/dri/r200/r200_vertprog.c
+++ b/src/mesa/drivers/dri/r200/r200_vertprog.c
@@ -120,14 +120,16 @@ static GLboolean r200VertexProgUpdateParams(struct gl_context *ctx, struct r200_
    }
 
    for(pi = 0; pi < paramList->NumParameters; pi++) {
+      unsigned pvo = paramList->ParameterValueOffset[pi];
+
       switch(paramList->Parameters[pi].Type) {
       case PROGRAM_STATE_VAR:
       //fprintf(stderr, "%s", vp->Parameters->Parameters[pi].Name);
       case PROGRAM_CONSTANT:
-	 *fcmd++ = paramList->ParameterValues[pi][0].f;
-	 *fcmd++ = paramList->ParameterValues[pi][1].f;
-	 *fcmd++ = paramList->ParameterValues[pi][2].f;
-	 *fcmd++ = paramList->ParameterValues[pi][3].f;
+	 *fcmd++ = paramList->ParameterValues[pvo + 0].f;
+	 *fcmd++ = paramList->ParameterValues[pvo + 1].f;
+	 *fcmd++ = paramList->ParameterValues[pvo + 2].f;
+	 *fcmd++ = paramList->ParameterValues[pvo + 3].f;
 	 break;
       default:
 	 _mesa_problem(NULL, "Bad param type in %s", __func__);
diff --git a/src/mesa/main/uniform_query.cpp b/src/mesa/main/uniform_query.cpp
index a48b6d29218..52b04c92434 100644
--- a/src/mesa/main/uniform_query.cpp
+++ b/src/mesa/main/uniform_query.cpp
@@ -723,13 +723,15 @@ log_program_parameters(const struct gl_shader_program *shProg)
       printf("Program %d %s shader parameters:\n",
              shProg->Name, _mesa_shader_stage_to_string(i));
       for (unsigned j = 0; j < prog->Parameters->NumParameters; j++) {
-	 printf("%s: %p %f %f %f %f\n",
+         unsigned pvo = prog->Parameters->ParameterValueOffset[j];
+         printf("%s: %u %p %f %f %f %f\n",
 		prog->Parameters->Parameters[j].Name,
-		prog->Parameters->ParameterValues[j],
-		prog->Parameters->ParameterValues[j][0].f,
-		prog->Parameters->ParameterValues[j][1].f,
-		prog->Parameters->ParameterValues[j][2].f,
-		prog->Parameters->ParameterValues[j][3].f);
+                pvo,
+                prog->Parameters->ParameterValues + pvo,
+                prog->Parameters->ParameterValues[pvo].f,
+                prog->Parameters->ParameterValues[pvo + 1].f,
+                prog->Parameters->ParameterValues[pvo + 2].f,
+                prog->Parameters->ParameterValues[pvo + 3].f);
       }
    }
    fflush(stdout);
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 29025d1c177..f26eddc9000 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -2452,7 +2452,7 @@ add_uniform_to_shader::visit_field(const glsl_type *type, const char *name,
    for (unsigned i = 0; i < num_params; i++) {
       unsigned comps = 4;
       _mesa_add_parameter(params, PROGRAM_UNIFORM, name, comps,
-                          type->gl_type, NULL, NULL);
+                          type->gl_type, NULL, NULL, true);
    }
 
    /* The first part of the uniform that's processed determines the base
@@ -2582,9 +2582,10 @@ _mesa_associate_uniform_storage(struct gl_context *ctx,
             break;
          }
 
+         unsigned pvo = params->ParameterValueOffset[i];
          _mesa_uniform_attach_driver_storage(storage, dmul * columns, dmul,
                                              format,
-                                             &params->ParameterValues[i]);
+                                             &params->ParameterValues[pvo]);
 
          /* When a bindless sampler/image is bound to a texture/image unit, we
           * have to overwrite the constant value by the resident handle
@@ -2601,11 +2602,11 @@ _mesa_associate_uniform_storage(struct gl_context *ctx,
                if (storage->type->without_array()->is_sampler()) {
                   assert(unit >= 0 && unit < prog->sh.NumBindlessSamplers);
                   prog->sh.BindlessSamplers[unit].data =
-                     &params->ParameterValues[i] + j;
+                     &params->ParameterValues[pvo] + 4 * j;
                } else if (storage->type->without_array()->is_image()) {
                   assert(unit >= 0 && unit < prog->sh.NumBindlessImages);
                   prog->sh.BindlessImages[unit].data =
-                     &params->ParameterValues[i] + j;
+                     &params->ParameterValues[pvo] + 4 * j;
                }
             }
          }
diff --git a/src/mesa/program/prog_execute.c b/src/mesa/program/prog_execute.c
index 2c77538c2af..b5a7a692aeb 100644
--- a/src/mesa/program/prog_execute.c
+++ b/src/mesa/program/prog_execute.c
@@ -117,11 +117,13 @@ get_src_register_pointer(const struct prog_src_register *source,
       /* Fallthrough */
    case PROGRAM_CONSTANT:
       /* Fallthrough */
-   case PROGRAM_UNIFORM:
+   case PROGRAM_UNIFORM: {
       if (reg >= (GLint) prog->Parameters->NumParameters)
          return ZeroVec;
-      return (GLfloat *) prog->Parameters->ParameterValues[reg];
 
+      unsigned pvo = prog->Parameters->ParameterValueOffset[reg];
+      return (GLfloat *) prog->Parameters->ParameterValues + pvo;
+   }
    case PROGRAM_SYSTEM_VALUE:
       assert(reg < (GLint) ARRAY_SIZE(machine->SystemValues));
       return machine->SystemValues[reg];
diff --git a/src/mesa/program/prog_opt_constant_fold.c b/src/mesa/program/prog_opt_constant_fold.c
index ba4a954186a..638bdbd1507 100644
--- a/src/mesa/program/prog_opt_constant_fold.c
+++ b/src/mesa/program/prog_opt_constant_fold.c
@@ -90,8 +90,9 @@ src_regs_are_same(const struct prog_src_register *a,
 static void
 get_value(struct gl_program *prog, struct prog_src_register *r, float *data)
 {
+   unsigned pvo = prog->Parameters->ParameterValueOffset[r->Index];
    const gl_constant_value *const value =
-      prog->Parameters->ParameterValues[r->Index];
+      prog->Parameters->ParameterValues + pvo;
 
    data[0] = value[GET_SWZ(r->Swizzle, 0)].f;
    data[1] = value[GET_SWZ(r->Swizzle, 1)].f;
diff --git a/src/mesa/program/prog_parameter.c b/src/mesa/program/prog_parameter.c
index 6b6599d7453..af9bb37cd5c 100644
--- a/src/mesa/program/prog_parameter.c
+++ b/src/mesa/program/prog_parameter.c
@@ -66,11 +66,13 @@ lookup_parameter_constant(const struct gl_program_parameter_list *list,
 
    for (i = 0; i < list->NumParameters; i++) {
       if (list->Parameters[i].Type == PROGRAM_CONSTANT) {
+         unsigned offset = list->ParameterValueOffset[i];
+
          if (!swizzleOut) {
             /* swizzle not allowed */
             GLuint j, match = 0;
             for (j = 0; j < vSize; j++) {
-               if (v[j].u == list->ParameterValues[i][j].u)
+               if (v[j].u == list->ParameterValues[offset + j].u)
                   match++;
             }
             if (match == vSize) {
@@ -84,7 +86,7 @@ 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].u == v[0].u) {
+                   if (list->ParameterValues[offset + j].u == v[0].u) {
                       /* found it */
                       *posOut = i;
                       *swizzleOut = MAKE_SWIZZLE4(j, j, j, j);
@@ -97,13 +99,13 @@ 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].u == list->ParameterValues[i][j].u) {
+                   if (v[j].u == list->ParameterValues[offset + j].u) {
                       swz[j] = j;
                       match++;
                    }
                    else {
                       for (k = 0; k < list->Parameters[i].Size; k++) {
-                         if (v[j].u == list->ParameterValues[i][k].u) {
+                         if (v[j].u == list->ParameterValues[offset + k].u) {
                             swz[j] = k;
                             match++;
                             break;
@@ -149,7 +151,9 @@ _mesa_new_parameter_list_sized(unsigned size)
       p->Parameters = (struct gl_program_parameter *)
          calloc(size, sizeof(struct gl_program_parameter));
 
-      p->ParameterValues = (gl_constant_value (*)[4])
+      p->ParameterValueOffset = (unsigned *) calloc(size, sizeof(unsigned));
+
+      p->ParameterValues = (gl_constant_value *)
          _mesa_align_malloc(size * 4 *sizeof(gl_constant_value), 16);
 
 
@@ -203,7 +207,11 @@ _mesa_reserve_parameter_storage(struct gl_program_parameter_list *paramList,
          realloc(paramList->Parameters,
                  paramList->Size * sizeof(struct gl_program_parameter));
 
-      paramList->ParameterValues = (gl_constant_value (*)[4])
+      paramList->ParameterValueOffset =
+         realloc(paramList->ParameterValueOffset,
+                 paramList->Size * sizeof(unsigned));
+
+      paramList->ParameterValues = (gl_constant_value *)
          _mesa_align_realloc(paramList->ParameterValues,         /* old buf */
                              oldNum * 4 * sizeof(gl_constant_value),/* old sz */
                              paramList->Size*4*sizeof(gl_constant_value),/*new*/
@@ -232,14 +240,17 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
                     gl_register_file type, const char *name,
                     GLuint size, GLenum datatype,
                     const gl_constant_value *values,
-                    const gl_state_index16 state[STATE_LENGTH])
+                    const gl_state_index16 state[STATE_LENGTH],
+                    bool pad_and_align)
 {
    assert(0 < size && size <=4);
    const GLuint oldNum = paramList->NumParameters;
+   unsigned oldValNum = pad_and_align ?
+      align(paramList->NumParameterValues, 4) : paramList->NumParameterValues;
 
    _mesa_reserve_parameter_storage(paramList, 1);
 
-   if (!paramList->Parameters ||
+   if (!paramList->Parameters || !paramList->ParameterValueOffset ||
        !paramList->ParameterValues) {
       /* out of memory */
       paramList->NumParameters = 0;
@@ -249,6 +260,9 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
 
    paramList->NumParameters = oldNum + 1;
 
+   unsigned pad = pad_and_align ? align(size, 4) : size;
+   paramList->NumParameterValues = oldValNum + pad;
+
    memset(&paramList->Parameters[oldNum], 0,
           sizeof(struct gl_program_parameter));
 
@@ -258,19 +272,26 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
    p->Size = size;
    p->DataType = datatype;
 
+   paramList->ParameterValueOffset[oldNum] = oldValNum;
    if (values) {
       if (size >= 4) {
-         COPY_4V(paramList->ParameterValues[oldNum], values);
+         COPY_4V(paramList->ParameterValues + oldValNum, values);
       } else {
          /* copy 1, 2 or 3 values */
          assert(size < 4);
-         for (unsigned j = 0; j < size; j++) {
-            paramList->ParameterValues[oldNum][j].f = values[j].f;
+         unsigned j;
+         for (j = 0; j < size; j++) {
+            paramList->ParameterValues[oldValNum + j].f = values[j].f;
+         }
+
+         /* Zero out padding (if any) to avoid valgrind errors */
+         for (; j < pad; j++) {
+            paramList->ParameterValues[oldValNum + j].f = 0;
          }
       }
    } else {
       for (unsigned j = 0; j < 4; j++) {
-         paramList->ParameterValues[oldNum][j].f = 0;
+         paramList->ParameterValues[oldValNum + j].f = 0;
       }
    }
 
@@ -316,9 +337,10 @@ _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
    if (size == 1 && swizzleOut) {
       for (pos = 0; pos < (GLint) paramList->NumParameters; pos++) {
          struct gl_program_parameter *p = paramList->Parameters + pos;
+         unsigned offset = paramList->ParameterValueOffset[pos];
          if (p->Type == PROGRAM_CONSTANT && p->Size + size <= 4) {
             /* ok, found room */
-            gl_constant_value *pVal = paramList->ParameterValues[pos];
+            gl_constant_value *pVal = paramList->ParameterValues + offset;
             GLuint swz = p->Size; /* 1, 2 or 3 for Y, Z, W */
             pVal[p->Size] = values[0];
             p->Size++;
@@ -330,7 +352,7 @@ _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
 
    /* add a new parameter to store this constant */
    pos = _mesa_add_parameter(paramList, PROGRAM_CONSTANT, NULL,
-                             size, datatype, values, NULL);
+                             size, datatype, values, NULL, true);
    if (pos >= 0 && swizzleOut) {
       if (size == 1)
          *swizzleOut = SWIZZLE_XXXX;
@@ -369,7 +391,7 @@ _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
 
    name = _mesa_program_state_string(stateTokens);
    index = _mesa_add_parameter(paramList, PROGRAM_STATE_VAR, name,
-                               size, GL_NONE, NULL, stateTokens);
+                               size, GL_NONE, NULL, stateTokens, true);
    paramList->StateFlags |= _mesa_program_state_flags(stateTokens);
 
    /* free name string here since we duplicated it in add_parameter() */
diff --git a/src/mesa/program/prog_parameter.h b/src/mesa/program/prog_parameter.h
index 41b3fe838a8..83eb0c5613a 100644
--- a/src/mesa/program/prog_parameter.h
+++ b/src/mesa/program/prog_parameter.h
@@ -82,9 +82,11 @@ struct gl_program_parameter
 struct gl_program_parameter_list
 {
    GLuint Size;           /**< allocated size of Parameters, ParameterValues */
-   GLuint NumParameters;  /**< number of parameters in arrays */
+   GLuint NumParameters;  /**< number of used parameters in array */
+   unsigned NumParameterValues;  /**< number of used parameter values array */
    struct gl_program_parameter *Parameters; /**< Array [Size] */
-   gl_constant_value (*ParameterValues)[4]; /**< Array [Size] of constant[4] */
+   unsigned *ParameterValueOffset;
+   gl_constant_value *ParameterValues; /**< Array [Size] of gl_constant_value */
    GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
                                might invalidate ParameterValues[] */
 };
@@ -108,7 +110,8 @@ _mesa_add_parameter(struct gl_program_parameter_list *paramList,
                     gl_register_file type, const char *name,
                     GLuint size, GLenum datatype,
                     const gl_constant_value *values,
-                    const gl_state_index16 state[STATE_LENGTH]);
+                    const gl_state_index16 state[STATE_LENGTH],
+                    bool pad_and_align);
 
 extern GLint
 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
diff --git a/src/mesa/program/prog_parameter_layout.c b/src/mesa/program/prog_parameter_layout.c
index 282a367ad04..d28a6675c06 100644
--- a/src/mesa/program/prog_parameter_layout.c
+++ b/src/mesa/program/prog_parameter_layout.c
@@ -92,10 +92,20 @@ copy_indirect_accessed_array(struct gl_program_parameter_list *src,
       assert(j == dst->NumParameters);
 
       /* copy src parameter [i] to dest parameter [j] */
-      memcpy(& dst->Parameters[j], curr,
+      memcpy(&dst->Parameters[j], curr,
 	     sizeof(dst->Parameters[j]));
-      memcpy(dst->ParameterValues[j], src->ParameterValues[i],
-	     sizeof(GLfloat) * 4);
+
+      dst->ParameterValueOffset[j] = dst->NumParameterValues;
+
+      gl_constant_value *pv_dst =
+         dst->ParameterValues + dst->ParameterValueOffset[j];
+      gl_constant_value *pv_src =
+         src->ParameterValues + src->ParameterValueOffset[i];
+
+      memcpy(pv_dst, pv_src, MIN2(src->Parameters[i].Size, 4) *
+             sizeof(GLfloat));
+      dst->NumParameterValues += MIN2(dst->Parameters[j].Size, 4);
+
 
       /* Pointer to the string name was copied.  Null-out src param name
        * to prevent double free later.
@@ -183,8 +193,9 @@ _mesa_layout_parameters(struct asm_parser_state *state)
 
 	 switch (p->Type) {
 	 case PROGRAM_CONSTANT: {
-	    const gl_constant_value *const v =
-	       state->prog->Parameters->ParameterValues[idx];
+            unsigned pvo = state->prog->Parameters->ParameterValueOffset[idx];
+            const gl_constant_value *const v =
+               state->prog->Parameters->ParameterValues + pvo;
 
 	    inst->Base.SrcReg[i].Index =
 	       _mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
diff --git a/src/mesa/program/prog_print.c b/src/mesa/program/prog_print.c
index b273bbf4c86..e8d087c506b 100644
--- a/src/mesa/program/prog_print.c
+++ b/src/mesa/program/prog_print.c
@@ -931,7 +931,9 @@ _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 = (GLfloat *) list->ParameterValues[i];
+      unsigned pvo = list->ParameterValueOffset[i];
+      const GLfloat *v = (GLfloat *) list->ParameterValues + pvo;
+
       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/prog_statevars.c b/src/mesa/program/prog_statevars.c
index e7fa72ce10e..4d7f388cfb0 100644
--- a/src/mesa/program/prog_statevars.c
+++ b/src/mesa/program/prog_statevars.c
@@ -1076,9 +1076,10 @@ _mesa_load_state_parameters(struct gl_context *ctx,
 
    for (i = 0; i < paramList->NumParameters; i++) {
       if (paramList->Parameters[i].Type == PROGRAM_STATE_VAR) {
+         unsigned pvo = paramList->ParameterValueOffset[i];
          _mesa_fetch_state(ctx,
 			   paramList->Parameters[i].StateIndexes,
-                           &paramList->ParameterValues[i][0]);
+                           paramList->ParameterValues + pvo);
       }
    }
 }
diff --git a/src/mesa/program/prog_to_nir.c b/src/mesa/program/prog_to_nir.c
index 851b3f2e5ea..b49616c0cf9 100644
--- a/src/mesa/program/prog_to_nir.c
+++ b/src/mesa/program/prog_to_nir.c
@@ -161,7 +161,8 @@ ptn_get_src(struct ptn_compile *c, const struct prog_src_register *prog_src)
       case PROGRAM_CONSTANT:
          if ((c->prog->arb.IndirectRegisterFiles &
               (1 << PROGRAM_CONSTANT)) == 0) {
-            float *v = (float *) plist->ParameterValues[prog_src->Index];
+            unsigned pvo = plist->ParameterValueOffset[prog_src->Index];
+            float *v = (float *) plist->ParameterValues + pvo;
             src.src = nir_src_for_ssa(nir_imm_vec4(b, v[0], v[1], v[2], v[3]));
             break;
          }
diff --git a/src/mesa/program/program_parse.y b/src/mesa/program/program_parse.y
index 8adbbf0ac5b..9b63764f752 100644
--- a/src/mesa/program/program_parse.y
+++ b/src/mesa/program/program_parse.y
@@ -2307,7 +2307,7 @@ int add_state_reference(struct gl_program_parameter_list *param_list,
 
    name = _mesa_program_state_string(tokens);
    index = _mesa_add_parameter(param_list, PROGRAM_STATE_VAR, name,
-                               size, GL_NONE, NULL, tokens);
+                               size, GL_NONE, NULL, tokens, true);
    param_list->StateFlags |= _mesa_program_state_flags(tokens);
 
    /* free name string here since we duplicated it in add_parameter() */
diff --git a/src/mesa/state_tracker/st_atifs_to_tgsi.c b/src/mesa/state_tracker/st_atifs_to_tgsi.c
index 76236cf9656..1180ede35e6 100644
--- a/src/mesa/state_tracker/st_atifs_to_tgsi.c
+++ b/src/mesa/state_tracker/st_atifs_to_tgsi.c
@@ -476,6 +476,8 @@ st_translate_atifs_program(
       }
 
       for (i = 0; i < program->Parameters->NumParameters; i++) {
+         unsigned pvo = program->Parameters->ParameterValueOffset[i];
+
          switch (program->Parameters->Parameters[i].Type) {
          case PROGRAM_STATE_VAR:
          case PROGRAM_UNIFORM:
@@ -484,7 +486,7 @@ st_translate_atifs_program(
          case PROGRAM_CONSTANT:
             t->constants[i] =
                ureg_DECL_immediate(ureg,
-                                   (const float*)program->Parameters->ParameterValues[i],
+                                   (const float*)program->Parameters->ParameterValues + pvo,
                                    4);
             break;
          default:
@@ -601,7 +603,7 @@ st_init_atifs_prog(struct gl_context *ctx, struct gl_program *prog)
    /* we always have the ATI_fs constants, and the fog params */
    for (i = 0; i < MAX_NUM_FRAGMENT_CONSTANTS_ATI; i++) {
       _mesa_add_parameter(prog->Parameters, PROGRAM_UNIFORM,
-                          NULL, 4, GL_FLOAT, NULL, NULL);
+                          NULL, 4, GL_FLOAT, NULL, NULL, true);
    }
    _mesa_add_state_reference(prog->Parameters, fog_params_state);
    _mesa_add_state_reference(prog->Parameters, fog_color);
diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c
index 0a6b23aff3b..87a72b2622c 100644
--- a/src/mesa/state_tracker/st_atom_constbuf.c
+++ b/src/mesa/state_tracker/st_atom_constbuf.c
@@ -71,11 +71,12 @@ void st_upload_constants(struct st_context *st, struct gl_program *prog)
       unsigned c;
 
       for (c = 0; c < MAX_NUM_FRAGMENT_CONSTANTS_ATI; c++) {
+         unsigned offset = params->ParameterValueOffset[c];
          if (ati_fs->LocalConstDef & (1 << c))
-            memcpy(params->ParameterValues[c],
+            memcpy(params->ParameterValues + offset,
                    ati_fs->Constants[c], sizeof(GLfloat) * 4);
          else
-            memcpy(params->ParameterValues[c],
+            memcpy(params->ParameterValues + offset,
                    st->ctx->ATIFragmentShader.GlobalConstants[c], sizeof(GLfloat) * 4);
       }
    }
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 911c855d43a..f0f68ac02c6 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -6591,6 +6591,8 @@ st_translate_program(
       t->num_constants = proginfo->Parameters->NumParameters;
 
       for (i = 0; i < proginfo->Parameters->NumParameters; i++) {
+         unsigned pvo = proginfo->Parameters->ParameterValueOffset[i];
+
          switch (proginfo->Parameters->Parameters[i].Type) {
          case PROGRAM_STATE_VAR:
          case PROGRAM_UNIFORM:
@@ -6608,7 +6610,7 @@ st_translate_program(
                t->constants[i] = ureg_DECL_constant(ureg, i);
             else
                t->constants[i] = emit_immediate(t,
-                                                proginfo->Parameters->ParameterValues[i],
+                                                proginfo->Parameters->ParameterValues + pvo,
                                                 proginfo->Parameters->Parameters[i].DataType,
                                                 4);
             break;
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index 99cddd66282..0ea201fdd6a 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -1011,6 +1011,8 @@ st_translate_mesa_program(struct gl_context *ctx,
       }
 
       for (i = 0; i < program->Parameters->NumParameters; i++) {
+         unsigned pvo = program->Parameters->ParameterValueOffset[i];
+
          switch (program->Parameters->Parameters[i].Type) {
          case PROGRAM_STATE_VAR:
          case PROGRAM_UNIFORM:
@@ -1025,12 +1027,12 @@ st_translate_mesa_program(struct gl_context *ctx,
              */
          case PROGRAM_CONSTANT:
             if (program->arb.IndirectRegisterFiles & PROGRAM_ANY_CONST)
-               t->constants[i] = ureg_DECL_constant(ureg, i);
+               t->constants[i] = ureg_DECL_constant( ureg, i );
             else
-               t->constants[i] =
+               t->constants[i] = 
                   ureg_DECL_immediate(ureg,
                                       (const float *)
-                                      program->Parameters->ParameterValues[i],
+                                      program->Parameters->ParameterValues + pvo,
                                       4);
             break;
          default: