glibc/SOURCES/glibc-rh1918115.patch

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2021-04-23 04:11:25 +00:00
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 --git a/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h b/sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h
index 76c677198dac5cb0..6cb70ce25209ee15 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);