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glsl: Use i2u and u2i to implement constructor conversions.

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Inspired by a patch from Bryan Cain <bryancain3@gmail.com>.

Fixes piglit tests:
- ctor-int-uint.vert
- ctor-ivec4-uvec4.vert
- ctor-uint-int.vert
- ctor-uvec4-ivec4.vert

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke
2011-06-14 23:23:49 -07:00
parent b633ddeb9f
commit 6b1ba7ccef
1 changed files with 29 additions and 6 deletions
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35
src/glsl/ast_function.cpp
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@@ -271,17 +271,36 @@ convert_component(ir_rvalue *src, const glsl_type *desired_type)
assert(a <= GLSL_TYPE_BOOL);
assert(b <= GLSL_TYPE_BOOL);
if ((a == b) || (src->type->is_integer() && desired_type->is_integer()))
if (a == b)
return src;
switch (a) {
case GLSL_TYPE_UINT:
switch (b) {
case GLSL_TYPE_INT:
result = new(ctx) ir_expression(ir_unop_i2u, src);
break;
case GLSL_TYPE_FLOAT:
result = new(ctx) ir_expression(ir_unop_i2u,
new(ctx) ir_expression(ir_unop_f2i, src));
break;
case GLSL_TYPE_BOOL:
result = new(ctx) ir_expression(ir_unop_i2u,
new(ctx) ir_expression(ir_unop_b2i, src));
break;
}
break;
case GLSL_TYPE_INT:
if (b == GLSL_TYPE_FLOAT)
result = new(ctx) ir_expression(ir_unop_f2i, desired_type, src, NULL);
else {
assert(b == GLSL_TYPE_BOOL);
result = new(ctx) ir_expression(ir_unop_b2i, desired_type, src, NULL);
switch (b) {
case GLSL_TYPE_UINT:
result = new(ctx) ir_expression(ir_unop_u2i, src);
break;
case GLSL_TYPE_FLOAT:
result = new(ctx) ir_expression(ir_unop_f2i, src);
break;
case GLSL_TYPE_BOOL:
result = new(ctx) ir_expression(ir_unop_b2i, src);
break;
}
break;
case GLSL_TYPE_FLOAT:
@@ -300,6 +319,9 @@ convert_component(ir_rvalue *src, const glsl_type *desired_type)
case GLSL_TYPE_BOOL:
switch (b) {
case GLSL_TYPE_UINT:
result = new(ctx) ir_expression(ir_unop_i2b,
new(ctx) ir_expression(ir_unop_u2i, src));
break;
case GLSL_TYPE_INT:
result = new(ctx) ir_expression(ir_unop_i2b, desired_type, src, NULL);
break;
@@ -311,6 +333,7 @@ convert_component(ir_rvalue *src, const glsl_type *desired_type)
}
assert(result != NULL);
assert(result->type == desired_type);
/* Try constant folding; it may fold in the conversion we just added. */
ir_constant *const constant = result->constant_expression_value();