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-Tag: glibc-2.33~518
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23af890b3f04e80da783ba64e6b6d94822e01d54;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.
---

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);