Which POWER implementations need the HWCAP_DFP check?
Florian Weimer
fweimer@redhat.com
Mon May 14 09:42:00 GMT 2018
I think this run-time check is unnecessary on POWER6 and later:
double d = (env); \
if(GLRO(dl_hwcap) & PPC_FEATURE_HAS_DFP) \
asm volatile (".machine push; " \
".machine \"power6\"; " \
"mtfsf 0xff,%0,1,0; " \
".machine pop" : : "f" (d)); \
else \
asm volatile ("mtfsf 0xff,%0" : : "f" (d)); \
In particularly, we do not need it on ppc64le. Correct?
It's one of the GLIBC_PRIVATE references in libm.so.6, which is why I'm
asking.
Thanks,
Florian
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