Mesa (glsl2): ir_constant_expression: Add support for dot products.

[Ian Romanick]

Module: Mesa
Branch: glsl2
Commit: 3f4a0b8bb0cfa36cc6f9968c8aab03f1cb0678ff
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3f4a0b8bb0cfa36cc6f9968c8aab03f1cb0678ff

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Mon Jul  5 21:15:32 2010 -0700

ir_constant_expression: Add support for dot products.

---

 src/glsl/ir_constant_expression.cpp |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index d05aa10..5c2e362 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -317,6 +317,26 @@ ir_constant_visitor::visit(ir_expression *ir)
       }
       break;
 
+   case ir_binop_dot:
+      assert(op[0]->type->is_vector() && op[1]->type->is_vector());
+      data.f[0] = 0;
+      for (c = 0; c < op[0]->type->components(); c++) {
+	 switch (ir->operands[0]->type->base_type) {
+	 case GLSL_TYPE_UINT:
+	    data.u[0] += op[0]->value.u[c] * op[1]->value.u[c];
+	    break;
+	 case GLSL_TYPE_INT:
+	    data.i[0] += op[0]->value.i[c] * op[1]->value.i[c];
+	    break;
+	 case GLSL_TYPE_FLOAT:
+	    data.f[0] += op[0]->value.f[c] * op[1]->value.f[c];
+	    break;
+	 default:
+	    assert(0);
+	 }
+      }
+
+      break;
    case ir_binop_add:
       assert(op[0]->type == op[1]->type || op0_scalar || op1_scalar);
       for (unsigned c = 0, c0 = 0, c1 = 0;