ir_constant_expression: Add support for ir_binop_mod.

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index 7e276e1..c0fe470 100644 (file)
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -575,6 +575,33 @@ ir_constant_visitor::visit(ir_expression *ir)
       }
 
       break;
+   case ir_binop_mod:
+      assert(op[0]->type == op[1]->type || op0_scalar || op1_scalar);
+      for (unsigned c = 0, c0 = 0, c1 = 0;
+          c < components;
+          c0 += c0_inc, c1 += c1_inc, c++) {
+
+        switch (ir->operands[0]->type->base_type) {
+        case GLSL_TYPE_UINT:
+           data.u[c] = op[0]->value.u[c0] % op[1]->value.u[c1];
+           break;
+        case GLSL_TYPE_INT:
+           data.i[c] = op[0]->value.i[c0] % op[1]->value.i[c1];
+           break;
+        case GLSL_TYPE_FLOAT:
+           /* We don't use fmod because it rounds toward zero; GLSL specifies
+            * the use of floor.
+            */
+           data.f[c] = (op[0]->value.f[c0] - op[1]->value.f[c1])
+              * floorf(op[0]->value.f[c0] / op[1]->value.f[c1]);
+           break;
+        default:
+           assert(0);
+        }
+      }
+
+      break;
+
    case ir_binop_logic_and:
       assert(op[0]->type->base_type == GLSL_TYPE_BOOL);
       for (unsigned c = 0; c < ir->operands[0]->type->components(); c++)