Module: Mesa Branch: master Commit: dd74369a0a501be7c772c926c62ab1185bf5996f URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=dd74369a0a501be7c772c926c62ab1185bf5996f
Author: Jason Ekstrand <[email protected]> Date: Mon Jan 26 09:40:25 2015 -0800 nir/opcodes: Don't go through doubles when constant-folding iabs Previously, we called the abs() function in math.h. However, this involves unnecessarily going through double. This commit changes it to use integers directly with a ternary. Reviewed-by: Connor Abbott <[email protected]> Reviewed-by: Eric Anholt <[email protected]> --- src/glsl/nir/nir_opcodes.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/glsl/nir/nir_opcodes.py b/src/glsl/nir/nir_opcodes.py index 0fa8bf5..f54a017 100644 --- a/src/glsl/nir/nir_opcodes.py +++ b/src/glsl/nir/nir_opcodes.py @@ -147,7 +147,7 @@ unop("inot", tint, "~src0") # invert every bit of the integer unop("fnot", tfloat, "(src0 == 0.0f) ? 1.0f : 0.0f") unop("fsign", tfloat, "(src0 == 0.0f) ? 0.0f : ((src0 > 0.0f) ? 1.0f : -1.0f)") unop("isign", tint, "(src0 == 0) ? 0 : ((src0 > 0) ? 1 : -1)") -unop("iabs", tint, "abs(src0)") +unop("iabs", tint, "(src0 < 0) ? -src0 : src0") unop("fabs", tfloat, "fabsf(src0)") unop("fsat", tfloat, "(src0 > 1.0f) ? 1.0f : ((src0 <= 0.0f) ? 0.0f : src0)") unop("frcp", tfloat, "1.0f / src0") _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
