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.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/glsl/builtins/profiles/130.frag b/src/glsl/builtins/profiles/130.frag
index c8b6319ae62..96440703bd3 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);