From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Fri, 10 Oct 2025 17:49:19 +0000 (-0300)
Subject: math: Remove acoshf fma usage
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9d9336f50cca869678112e2fd67662e997dcedf;p=thirdparty%2Fglibc.git

math: Remove acoshf fma usage

The fma is not strickly required to provide correctly rounded and
it helps on !__FP_FAST_FMA ABIs.

Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
---

diff --git a/sysdeps/ieee754/flt-32/e_acoshf.c b/sysdeps/ieee754/flt-32/e_acoshf.c
index b2a9c6b2f0..6cbc4f584b 100644
--- a/sysdeps/ieee754/flt-32/e_acoshf.c
+++ b/sysdeps/ieee754/flt-32/e_acoshf.c
@@ -93,10 +93,10 @@ __ieee754_acoshf (float x)
 	  const double ln2h = 0x1.62e4p-1;
 	  double Lh = ln2h * e;
 	  double Ll = ln2l * e;
-	  r = fma (z, c0, Ll + LIX[j]) + Lh;
+	  r = (z * c0 + (Ll + LIX[j])) + Lh;
 	  if (__glibc_unlikely ((asuint64 (r) & UINT64_C(0xfffffff)) == 0))
 	    {
-	      double h = fma (z, c0, Ll + LIX[j]) + (Lh - r);
+	      double h = (z * c0 + (Ll + LIX[j])) + (Lh - r);
 	      r = r + 64.0 * h;
 	    }
 	}