const GLuint nr = 1;
const GLuint component = GET_SWZ(src->Swizzle, channel);
- /* Extended swizzle terms */
- if (component == SWIZZLE_ZERO) {
- return brw_imm_f(0.0F);
- }
- else if (component == SWIZZLE_ONE) {
- return brw_imm_f(1.0F);
+ /* Only one immediate value can be used per native opcode, and it
+ * has be in the src1 slot, so not all Mesa instructions will get
+ * to take advantage of immediate constants.
+ */
+ if (brw_wm_arg_can_be_immediate(inst->Opcode, srcRegIndex)) {
+ const struct gl_program_parameter_list *params;
+
+ params = c->fp->program.Base.Parameters;
+
+ /* Extended swizzle terms */
+ if (component == SWIZZLE_ZERO) {
+ return brw_imm_f(0.0F);
+ } else if (component == SWIZZLE_ONE) {
+ if (src->Negate)
+ return brw_imm_f(-1.0F);
+ else
+ return brw_imm_f(1.0F);
+ }
+
+ if (src->File == PROGRAM_CONSTANT) {
+ float f = params->ParameterValues[src->Index][component];
+
+ if (src->Abs)
+ f = fabs(f);
+ if (src->Negate)
+ f = -f;
+
+ return brw_imm_f(f);
+ }
}
if (c->fp->use_const_buffer &&