From: Elie Tournier <tournier.elie@gmail.com>
Date: Tue, 8 Aug 2017 13:28:48 +0000 (+0100)
Subject: glsl: Add utility function to extract 64-bit sign
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3e4d5ea7b8dda32ee6a8a2d23f6ab4f00f4334e7;p=mesa.git

glsl: Add utility function to extract 64-bit sign

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index 2cf85bbcafc..5f2804a8a34 100644
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -159,3 +159,10 @@ __fne64(uint64_t a, uint64_t b)
 
    return !__feq64_nonnan(a, b);
 }
+
+/* Returns the sign bit of the double-precision floating-point value `a'.*/
+uint
+__extractFloat64Sign(uint64_t a)
+{
+   return unpackUint2x32(a).y >> 31;
+}