https://bugs.kde.org/show_bug.cgi?id=408009
Bug ID: 408009
Summary: Expose rdrand and f16c even on avx if host cpu
supports them
Product: valgrind
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: m...@klomp.org
Target Milestone: ---
Currently the following code in coregrind/m_machine.c (machine_get_hwcaps)
prevents using rdrand and f16c on avx only (none-avx2) machines:
/* Sanity check for RDRAND and F16C. These don't actually *need* AVX2, bu
it's convenient to restrict them to the AVX2 case since the simulated
CPUID we'll offer them on has AVX2 as a base. */
if (!have_avx2) {
have_f16c = False;
have_rdrand = False;
}
So even if the host CPU supports it, valgrind disables it.
Both can be supported on avx machines too.
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