From: Ondřej Hošek <ondra.hosek@gmail.com>
Date: Wed, 26 Aug 2020 02:26:50 +0000 (+0200)
Subject: x86-64: Fix FMA4 detection in ifunc [BZ #26534]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cebc01cbfd6c257f329e818b68bb1b2eef2afe09;p=thirdparty%2Fglibc.git

x86-64: Fix FMA4 detection in ifunc [BZ #26534]

A typo in commit 107e6a3c2212ba7a3a4ec7cae8d82d73f7c95d0b causes the
FMA4 code path to be taken on systems that support FMA, even if they do
not support FMA4. Fix this to detect FMA4.

(cherry picked from commit 23af890b3f04e80da783ba64e6b6d94822e01d54)
---

diff --git a/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h b/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h
index 76597589722..e5fd5ac9cb5 100644
--- a/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h
+++ b/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h
@@ -32,7 +32,7 @@ IFUNC_SELECTOR (void)
       && CPU_FEATURE_USABLE_P (cpu_features, AVX2))
     return OPTIMIZE (fma);
 
-  if (CPU_FEATURE_USABLE_P (cpu_features, FMA))
+  if (CPU_FEATURE_USABLE_P (cpu_features, FMA4))
     return OPTIMIZE (fma4);
 
   return OPTIMIZE (sse2);