[Mesa-dev] [PATCH v3 12/29] glsl/ir: Add builtin constant function support for doubles

[Matt Turner]

On Sun, Feb 8, 2015 at 1:00 AM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> @@ -667,32 +679,81 @@ ir_expression::constant_expression_value(struct hash_table *variable_context)
>             data.b[0] = true;
>        }
>        break;
> -
> -   case ir_unop_trunc:
> +   case ir_unop_d2f:
> +      assert(op[0]->type->base_type == GLSL_TYPE_DOUBLE);
> +      for (unsigned c = 0; c < op[0]->type->components(); c++) {
> +        data.f[c] = op[0]->value.d[c];
> +      }
> +      break;
> +   case ir_unop_f2d:
>        assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
>        for (unsigned c = 0; c < op[0]->type->components(); c++) {
> -        data.f[c] = truncf(op[0]->value.f[c]);
> +        data.d[c] = op[0]->value.f[c];
> +      }
> +      break;
> +   case ir_unop_d2i:
> +      assert(op[0]->type->base_type == GLSL_TYPE_DOUBLE);
> +      for (unsigned c = 0; c < op[0]->type->components(); c++) {
> +        data.i[c] = op[0]->value.d[c];
> +      }
> +      break;
> +   case ir_unop_i2d:
> +      assert(op[0]->type->base_type == GLSL_TYPE_INT);
> +      for (unsigned c = 0; c < op[0]->type->components(); c++) {
> +        data.d[c] = op[0]->value.i[c];
> +      }
> +      break;
> +   case ir_unop_d2u:
> +      assert(op[0]->type->base_type == GLSL_TYPE_DOUBLE);
> +      for (unsigned c = 0; c < op[0]->type->components(); c++) {
> +        data.u[c] = op[0]->value.d[c];
> +      }
> +      break;
> +   case ir_unop_u2d:
> +      assert(op[0]->type->base_type == GLSL_TYPE_UINT);
> +      for (unsigned c = 0; c < op[0]->type->components(); c++) {
> +        data.d[c] = op[0]->value.u[c];
> +      }
> +      break;
> +   case ir_unop_d2b:
> +      assert(op[0]->type->base_type == GLSL_TYPE_DOUBLE);
> +      for (unsigned c = 0; c < op[0]->type->components(); c++) {
> +         data.b[c] = op[0]->value.d[c] != 0.0 ? true : false;

? true : false is a nop.