glsl2: Add ir_unop_fract as an expression type.
Most backends will prefer seeing this to seeing (a - floor(a)), so
represent it explicitly.
diff --git a/src/glsl/builtin_function.cpp b/src/glsl/builtin_function.cpp
index b7dbc6b..30ba6a5 100644
--- a/src/glsl/builtin_function.cpp
+++ b/src/glsl/builtin_function.cpp
@@ -781,22 +781,22 @@
" (signature float\n"
" (parameters\n"
" (declare (in) float x))\n"
- " ((return (expression float - (var_ref x) (expression float floor (var_ref x))))))\n"
+ " ((return (expression float fract (var_ref x)))))\n"
"\n"
" (signature vec2\n"
" (parameters\n"
" (declare (in) vec2 x))\n"
- " ((return (expression vec2 - (var_ref x) (expression vec2 floor (var_ref x))))))\n"
+ " ((return (expression vec2 fract (var_ref x)))))\n"
"\n"
" (signature vec3\n"
" (parameters\n"
" (declare (in) vec3 x))\n"
- " ((return (expression vec3 - (var_ref x) (expression vec3 floor (var_ref x))))))\n"
+ " ((return (expression vec3 fract (var_ref x)))))\n"
"\n"
" (signature vec4\n"
" (parameters\n"
" (declare (in) vec4 x))\n"
- " ((return (expression vec4 - (var_ref x) (expression vec4 floor (var_ref x))))))\n"
+ " ((return (expression vec4 fract (var_ref x)))))\n"
"))\n"
"\n"
};