Mesa (glsl2): ir_constant_expression: Add support for ir_binop_pow.

[Ian Romanick]

Module: Mesa
Branch: glsl2
Commit: 891a0647e419c0cd2b67e43540936bf0ac94f840
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=891a0647e419c0cd2b67e43540936bf0ac94f840

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Thu Jul  8 23:35:09 2010 -0700

ir_constant_expression: Add support for ir_binop_pow.

---

 src/glsl/ir_constant_expression.cpp |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index ef8661b..437a380 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -387,6 +387,13 @@ ir_constant_visitor::visit(ir_expression *ir)
       }
       break;
 
+   case ir_binop_pow:
+      assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
+      for (unsigned c = 0; c < ir->operands[0]->type->components(); c++) {
+	 data.f[c] = powf(op[0]->value.f[c], op[1]->value.f[c]);
+      }
+      break;
+
    case ir_binop_dot:
       assert(op[0]->type->is_vector() && op[1]->type->is_vector());
       data.f[0] = 0;