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.

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 0000000000..d0d425bd65
--- /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 c8b6319ae6..96440703bd 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 9d1056f282..eb765186fc 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);