fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-02 20:58:04 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

glsl: Add isinf() and isnan() builtins.

Browse source 
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".
This commit is contained in:
Paul Berry 2011-10-06 10:20:10 -07:00
parent b6f32bbe12
commit ede60bc467
4 changed files with 34 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
src/glsl/builtins/ir/isinf.ir Normal file
View file

@ -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))))))))

17
src/glsl/builtins/ir/isnan.ir Normal file
View file

@ -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)))))))

2
src/glsl/builtins/profiles/130.frag
View file

@ -288,7 +288,6 @@ vec2 smoothstep(float edge0, float edge1, vec2 x);
vec3 smoothstep(float edge0, float edge1, vec3 x);
vec4 smoothstep(float edge0, float edge1, vec4 x);
#if 0
bool isnan(float x);
bvec2 isnan(vec2 x);
bvec3 isnan(vec3 x);
@ -298,7 +297,6 @@ bool isinf(float x);
bvec2 isinf(vec2 x);
bvec3 isinf(vec3 x);
bvec4 isinf(vec4 x);
#endif
/*
* 8.4 - Geometric Functions

2
src/glsl/builtins/profiles/130.vert
View file

@ -288,7 +288,6 @@ vec2 smoothstep(float edge0, float edge1, vec2 x);
vec3 smoothstep(float edge0, float edge1, vec3 x);
vec4 smoothstep(float edge0, float edge1, vec4 x);
#if 0
bool isnan(float x);
bvec2 isnan(vec2 x);
bvec3 isnan(vec3 x);
@ -298,7 +297,6 @@ bool isinf(float x);
bvec2 isinf(vec2 x);
bvec3 isinf(vec3 x);
bvec4 isinf(vec4 x);
#endif
/*
* 8.4 - Geometric Functions