Mesa (master): glsl: Add support for the 1.30 round() built-in.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 27ced5c5ff907557007ed6cb78cef5810cf48ef5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=27ced5c5ff907557007ed6cb78cef5810cf48ef5

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Thu Oct 14 14:33:30 2010 -0700

glsl: Add support for the 1.30 round() built-in.

This implements round() via the ir_unop_round_even opcode, rather than
adding a new opcode.  We may wish to add one in the future, since it
might enable a small performance increase on some hardware, but for now,
this should suffice.

---

 src/glsl/builtins/ir/round          |   21 +++++++++++++++++++++
 src/glsl/builtins/profiles/130.frag |    5 +++++
 src/glsl/builtins/profiles/130.vert |    5 +++++
 3 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/src/glsl/builtins/ir/round b/src/glsl/builtins/ir/round
new file mode 100644
index 0000000..d0d425b
--- /dev/null
+++ b/src/glsl/builtins/ir/round
@@ -0,0 +1,21 @@
+((function round
+   (signature float
+     (parameters
+       (declare (in) float arg0))
+     ((return (expression float round_even (var_ref arg0)))))
+
+   (signature vec2
+     (parameters
+       (declare (in) vec2 arg0))
+     ((return (expression vec2 round_even (var_ref arg0)))))
+
+   (signature vec3
+     (parameters
+       (declare (in) vec3 arg0))
+     ((return (expression vec3 round_even (var_ref arg0)))))
+
+   (signature vec4
+     (parameters
+       (declare (in) vec4 arg0))
+     ((return (expression vec4 round_even (var_ref arg0)))))
+))
diff --git a/src/glsl/builtins/profiles/130.frag b/src/glsl/builtins/profiles/130.frag
index c8b6319..9644070 100644
--- a/src/glsl/builtins/profiles/130.frag
+++ b/src/glsl/builtins/profiles/130.frag
@@ -148,6 +148,11 @@ vec2  trunc(vec2  x);
 vec3  trunc(vec3  x);
 vec4  trunc(vec4  x);
 
+float round(float x);
+vec2  round(vec2  x);
+vec3  round(vec3  x);
+vec4  round(vec4  x);
+
 float roundEven(float x);
 vec2  roundEven(vec2  x);
 vec3  roundEven(vec3  x);
diff --git a/src/glsl/builtins/profiles/130.vert b/src/glsl/builtins/profiles/130.vert
index 9d1056f..eb76518 100644
--- a/src/glsl/builtins/profiles/130.vert
+++ b/src/glsl/builtins/profiles/130.vert
@@ -148,6 +148,11 @@ vec2  trunc(vec2  x);
 vec3  trunc(vec3  x);
 vec4  trunc(vec4  x);
 
+float round(float x);
+vec2  round(vec2  x);
+vec3  round(vec3  x);
+vec4  round(vec4  x);
+
 float roundEven(float x);
 vec2  roundEven(vec2  x);
 vec3  roundEven(vec3  x);