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glsl: Add "built-in" function to do abs(fp64)
author
Elie Tournier
<tournier.elie@gmail.com>
Tue, 8 Aug 2017 12:39:18 +0000
(13:39 +0100)
committer
Matt Turner
<mattst88@gmail.com>
Thu, 10 Jan 2019 00:42:40 +0000
(16:42 -0800)
Signed-off-by: Elie Tournier <elie.tournier@collabora.com>
src/compiler/glsl/float64.glsl
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diff --git
a/src/compiler/glsl/float64.glsl
b/src/compiler/glsl/float64.glsl
index
a299269
..
28e3258
100644
(file)
--- a/
src/compiler/glsl/float64.glsl
+++ b/
src/compiler/glsl/float64.glsl
@@
-56,3
+56,14
@@
#define FLOAT_ROUND_DOWN 2
#define FLOAT_ROUND_UP 3
#define FLOAT_ROUNDING_MODE FLOAT_ROUND_NEAREST_EVEN
+
+/* Absolute value of a Float64 :
+ * Clear the sign bit
+ */
+uint64_t
+__fabs64(uint64_t __a)
+{
+ uvec2 a = unpackUint2x32(__a);
+ a.y &= 0x7FFFFFFFu;
+ return packUint2x32(a);
+}