ir_constant_expression: Add support for the "equal" builtin.

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index 52f53d9ff486ffb62ebda40126b3effc101e44d3..e6f9558b62d660ef918220149da777d5796167e0 100644 (file)
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -864,7 +864,22 @@ ir_call::constant_expression_value()
    } else if (strcmp(callee, "dot") == 0) {
       expr = new(mem_ctx) ir_expression(ir_binop_dot, type, op[0], op[1]);
    } else if (strcmp(callee, "equal") == 0) {
-      return NULL; /* FINISHME: implement this */
+      assert(op[0]->type->is_vector() && op[1] && op[1]->type->is_vector());
+      for (unsigned c = 0; c < op[0]->type->components(); c++) {
+        switch (op[0]->type->base_type) {
+        case GLSL_TYPE_UINT:
+           data.b[c] = op[0]->value.u[c] == op[1]->value.u[c];
+           break;
+        case GLSL_TYPE_INT:
+           data.b[c] = op[0]->value.i[c] == op[1]->value.i[c];
+           break;
+        case GLSL_TYPE_FLOAT:
+           data.b[c] = op[0]->value.f[c] == op[1]->value.f[c];
+           break;
+        default:
+           assert(!"Should not get here.");
+        }
+      }
    } else if (strcmp(callee, "exp") == 0) {
       expr = new(mem_ctx) ir_expression(ir_unop_exp, type, op[0], NULL);
    } else if (strcmp(callee, "exp2") == 0) {