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* [glibc] x86-64: Fix FMA4 detection in ifunc [BZ #26534]
@ 2020-09-02 12:09 H.J. Lu
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From: H.J. Lu @ 2020-09-02 12:09 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=23af890b3f04e80da783ba64e6b6d94822e01d54
commit 23af890b3f04e80da783ba64e6b6d94822e01d54
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.
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 12:09 [glibc] x86-64: Fix FMA4 detection in ifunc [BZ #26534] H.J. Lu
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