From: Kenneth Graunke <kenneth@whitecape.org>
Date: Thu, 22 Jul 2010 22:34:49 +0000 (-0700)
Subject: ir_constant_expression: Add support for the "transpose" builtin.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b09ae5dd3f9b8e380e2608f4ee3a7902f5ecc15e;p=mesa.git

ir_constant_expression: Add support for the "transpose" builtin.
---

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index b6cb2d86726..c4e6d837b02 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -1096,7 +1096,14 @@ ir_call::constant_expression_value()
       for (unsigned c = 0; c < op[0]->type->components(); c++)
 	 data.f[c] = tanhf(op[0]->value.f[c]);
    } else if (strcmp(callee, "transpose") == 0) {
-      return NULL; /* FINISHME: implement this */
+      assert(op[0]->type->is_matrix());
+      const unsigned n = op[0]->type->vector_elements;
+      const unsigned m = op[0]->type->matrix_columns;
+      for (unsigned j = 0; j < m; j++) {
+	 for (unsigned i = 0; i < n; i++) {
+	    data.f[m*i+j] += op[0]->value.f[i+n*j];
+	 }
+      }
    } else {
       /* Unsupported builtin - some are not allowed in constant expressions. */
       return NULL;