Re: [Mesa-dev] [PATCH 02/14] glsl: Add constant evaluation of ir_unop_saturate

[Ian Romanick]

On 06/23/2014 10:27 PM, Abdiel Janulgue wrote:
> Signed-off-by: Abdiel Janulgue 
> ---
>  src/glsl/ir_constant_expression.cpp | 6 ++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/src/glsl/ir_constant_expression.cpp 
> b/src/glsl/ir_constant_expression.cpp
> index 8afe8f7..b885a2f 100644
> --- a/src/glsl/ir_constant_expression.cpp
> +++ b/src/glsl/ir_constant_expression.cpp
> @@ -1464,6 +1464,12 @@ ir_expression::constant_expression_value(struct 
> hash_table *variable_context)
>}
>break;
>  
> +   case ir_unop_saturate:
> +  for (unsigned c = 0; c < components; c++) {
> + data.f[c] = MIN2(MAX2(op[0]->value.f[c], 0.0f), 1.0f);

There's a CLAMP macro in src/mesa/main/macros.h.

> +  }
> +  break;
> +
> case ir_triop_bitfield_extract: {
>int offset = op[1]->value.i[0];
>int bits = op[2]->value.i[0];
> 

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[Mesa-dev] [PATCH 02/14] glsl: Add constant evaluation of ir_unop_saturate

[Abdiel Janulgue]

Signed-off-by: Abdiel Janulgue 
---
 src/glsl/ir_constant_expression.cpp | 6 ++
 1 file changed, 6 insertions(+)

diff --git a/src/glsl/ir_constant_expression.cpp 
b/src/glsl/ir_constant_expression.cpp
index 8afe8f7..b885a2f 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -1464,6 +1464,12 @@ ir_expression::constant_expression_value(struct 
hash_table *variable_context)
   }
   break;
 
+   case ir_unop_saturate:
+  for (unsigned c = 0; c < components; c++) {
+ data.f[c] = MIN2(MAX2(op[0]->value.f[c], 0.0f), 1.0f);
+  }
+  break;
+
case ir_triop_bitfield_extract: {
   int offset = op[1]->value.i[0];
   int bits = op[2]->value.i[0];
-- 
1.9.1

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