From: Matt Turner <mattst88@gmail.com>
Date: Wed, 31 Oct 2018 04:48:01 +0000 (-0700)
Subject: glsl: Add "built-in" functions to do ffma(fp64)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=92ac2169fb015b7bb0b8e5fc2c99131e3c652cbb;p=mesa.git

glsl: Add "built-in" functions to do ffma(fp64)

Definitely not actually a fused-multiply add.

Reviewed-by: Elie Tournier <tournier.elie@gmail.com>
---

diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index e09655e5055..1a434b1fd59 100644
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -798,6 +798,12 @@ __fmul64(uint64_t a, uint64_t b)
    return __roundAndPackFloat64(zSign, zExp, zFrac0, zFrac1, zFrac2);
 }
 
+uint64_t
+__ffma64(uint64_t a, uint64_t b, uint64_t c)
+{
+   return __fadd64(__fmul64(a, b), c);
+}
+
 /* Shifts the 64-bit value formed by concatenating `a0' and `a1' right by the
  * number of bits given in `count'.  Any bits shifted off are lost.  The value
  * of `count' can be arbitrarily large; in particular, if `count' is greater