diff options
| author | Paul Berry <[email protected]> | 2011-10-06 10:20:10 -0700 |
|---|---|---|
| committer | Paul Berry <[email protected]> | 2011-10-31 11:24:03 -0700 |
| commit | ede60bc4670a8d9c14921c77abee1ac57fc0e6bf (patch) | |
| tree | c545778fe124435a470d0958d60110a52863e242 /src/glsl/builtins/ir | |
| parent | b6f32bbe12e1082e78951b6ef073bf244ba0b8b7 (diff) | |
glsl: Add isinf() and isnan() builtins.
The implementations are as follows:
isinf(x) = (abs(x) == +infinity)
isnan(x) = (x != x)
Note: the latter formula is not necessarily obvious. It works because
NaN is the only floating point number that does not equal itself.
Fixes piglit tests "isinf-and-isnan fs_basic" and "isinf-and-isnan
vs_basic".
Diffstat (limited to 'src/glsl/builtins/ir')
| -rw-r--r-- | src/glsl/builtins/ir/isinf.ir | 17 | ||||
| -rw-r--r-- | src/glsl/builtins/ir/isnan.ir | 17 |
2 files changed, 34 insertions, 0 deletions
diff --git a/src/glsl/builtins/ir/isinf.ir b/src/glsl/builtins/ir/isinf.ir new file mode 100644 index 00000000000..92922f6fa36 --- /dev/null +++ b/src/glsl/builtins/ir/isinf.ir @@ -0,0 +1,17 @@ +((function isinf + (signature bool + (parameters + (declare (in) float x)) + ((return (expression bool == (expression float abs (var_ref x)) (constant float (+INF)))))) + (signature bvec2 + (parameters + (declare (in) vec2 x)) + ((return (expression bvec2 == (expression vec2 abs (var_ref x)) (constant vec2 (+INF +INF)))))) + (signature bvec3 + (parameters + (declare (in) vec3 x)) + ((return (expression bvec3 == (expression vec3 abs (var_ref x)) (constant vec3 (+INF +INF +INF)))))) + (signature bvec4 + (parameters + (declare (in) vec4 x)) + ((return (expression bvec4 == (expression vec4 abs (var_ref x)) (constant vec4 (+INF +INF +INF +INF)))))))) diff --git a/src/glsl/builtins/ir/isnan.ir b/src/glsl/builtins/ir/isnan.ir new file mode 100644 index 00000000000..b67349f2a5c --- /dev/null +++ b/src/glsl/builtins/ir/isnan.ir @@ -0,0 +1,17 @@ +((function isnan + (signature bool + (parameters + (declare (in) float x)) + ((return (expression bool != (var_ref x) (var_ref x))))) + (signature bvec2 + (parameters + (declare (in) vec2 x)) + ((return (expression bvec2 != (var_ref x) (var_ref x))))) + (signature bvec3 + (parameters + (declare (in) vec3 x)) + ((return (expression bvec3 != (var_ref x) (var_ref x))))) + (signature bvec4 + (parameters + (declare (in) vec4 x)) + ((return (expression bvec4 != (var_ref x) (var_ref x))))))) |