Mesa (glsl2): glsl2: Fix up the implementation of fract() for vector types.

[Eric Anholt]

Module: Mesa
Branch: glsl2
Commit: 4e16a7b526bb4736cd11e512009cf6532b2d1dc5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4e16a7b526bb4736cd11e512009cf6532b2d1dc5

Author: Eric Anholt <eric at anholt.net>
Date:   Wed Jun 30 15:59:07 2010 -0700

glsl2: Fix up the implementation of fract() for vector types.

There's no need to split each vector component out, just do vector ops.

---

 src/glsl/builtin_function.cpp |   18 +++---------------
 src/glsl/builtins/110/fract   |   18 +++---------------
 2 files changed, 6 insertions(+), 30 deletions(-)

diff --git a/src/glsl/builtin_function.cpp b/src/glsl/builtin_function.cpp
index d248388..626ba4e 100644
--- a/src/glsl/builtin_function.cpp
+++ b/src/glsl/builtin_function.cpp
@@ -786,29 +786,17 @@ static const char *builtins_110_fract = {
    "   (signature vec2\n"
    "     (parameters\n"
    "       (declare (in) vec2 x))\n"
-   "     ((declare () vec2 t)\n"
-   "      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float - (swiz x (var_ref x)) (expression float floor (swiz x (var_ref x)))))\n"
-   "      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float - (swiz y (var_ref x)) (expression float floor (swiz y (var_ref x)))))\n"
-   "      (return (var_ref t))))\n"
+   "     ((return (expression vec2 - (var_ref x) (expression vec2 floor (var_ref x))))))\n"
    "\n"
    "   (signature vec3\n"
    "     (parameters\n"
    "       (declare (in) vec3 x))\n"
-   "     ((declare () vec3 t)\n"
-   "      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float - (swiz x (var_ref x)) (expression float floor (swiz x (var_ref x)))))\n"
-   "      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float - (swiz y (var_ref x)) (expression float floor (swiz y (var_ref x)))))\n"
-   "      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float - (swiz z (var_ref x)) (expression float floor (swiz z (var_ref x)))))\n"
-   "      (return (var_ref t))))\n"
+   "     ((return (expression vec3 - (var_ref x) (expression vec3 floor (var_ref x))))))\n"
    "\n"
    "   (signature vec4\n"
    "     (parameters\n"
    "       (declare (in) vec4 x))\n"
-   "     ((declare () vec4 t)\n"
-   "      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float - (swiz x (var_ref x)) (expression float floor (swiz x (var_ref x)))))\n"
-   "      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float - (swiz y (var_ref x)) (expression float floor (swiz y (var_ref x)))))\n"
-   "      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float - (swiz z (var_ref x)) (expression float floor (swiz z (var_ref x)))))\n"
-   "      (assign (constant bool (1)) (swiz w (var_ref t)) (expression float - (swiz w (var_ref x)) (expression float floor (swiz w (var_ref x)))))\n"
-   "      (return (var_ref t))))\n"
+   "     ((return (expression vec4 - (var_ref x) (expression vec4 floor (var_ref x))))))\n"
    "))\n"
    "\n"
 };
diff --git a/src/glsl/builtins/110/fract b/src/glsl/builtins/110/fract
index 3995bfa..46741bb 100644
--- a/src/glsl/builtins/110/fract
+++ b/src/glsl/builtins/110/fract
@@ -7,28 +7,16 @@
    (signature vec2
      (parameters
        (declare (in) vec2 x))
-     ((declare () vec2 t)
-      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float - (swiz x (var_ref x)) (expression float floor (swiz x (var_ref x)))))
-      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float - (swiz y (var_ref x)) (expression float floor (swiz y (var_ref x)))))
-      (return (var_ref t))))
+     ((return (expression vec2 - (var_ref x) (expression vec2 floor (var_ref x))))))
 
    (signature vec3
      (parameters
        (declare (in) vec3 x))
-     ((declare () vec3 t)
-      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float - (swiz x (var_ref x)) (expression float floor (swiz x (var_ref x)))))
-      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float - (swiz y (var_ref x)) (expression float floor (swiz y (var_ref x)))))
-      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float - (swiz z (var_ref x)) (expression float floor (swiz z (var_ref x)))))
-      (return (var_ref t))))
+     ((return (expression vec3 - (var_ref x) (expression vec3 floor (var_ref x))))))
 
    (signature vec4
      (parameters
        (declare (in) vec4 x))
-     ((declare () vec4 t)
-      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float - (swiz x (var_ref x)) (expression float floor (swiz x (var_ref x)))))
-      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float - (swiz y (var_ref x)) (expression float floor (swiz y (var_ref x)))))
-      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float - (swiz z (var_ref x)) (expression float floor (swiz z (var_ref x)))))
-      (assign (constant bool (1)) (swiz w (var_ref t)) (expression float - (swiz w (var_ref x)) (expression float floor (swiz w (var_ref x)))))
-      (return (var_ref t))))
+     ((return (expression vec4 - (var_ref x) (expression vec4 floor (var_ref x))))))
 ))