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* [glibc/release/2.32/master] x86-64: Fix FMA4 detection in ifunc [BZ #26534]
@ 2020-09-02 13:06 Adhemerval Zanella
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From: Adhemerval Zanella @ 2020-09-02 13:06 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cebc01cbfd6c257f329e818b68bb1b2eef2afe09
commit cebc01cbfd6c257f329e818b68bb1b2eef2afe09
Author: Ondřej Hošek <ondra.hosek@gmail.com>
Date: Wed Aug 26 04:26:50 2020 +0200
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:
---
sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h b/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h
index 7659758972..e5fd5ac9cb 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);
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2020-09-02 13:06 [glibc/release/2.32/master] x86-64: Fix FMA4 detection in ifunc [BZ #26534] Adhemerval Zanella
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