From 4c0ccfc5b39bf69ef90145e5ccf4cea04d9a8a73 Mon Sep 17 00:00:00 2001
From: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Date: Thu, 12 Jun 2014 13:53:40 -0700
Subject: [PATCH] glsl: Add constant evaluation of ir_unop_saturate

v2: Use CLAMP macro (Ian Romanick)

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---
 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 96060217c97..1e8b3a3cced 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -1469,6 +1469,12 @@ 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] = CLAMP(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];
-- 
2.30.2