zenithsiz/ftmemsim-valgrind
1
0
Fork 0
mirror of https://github.com/Zenithsiz/ftmemsim-valgrind.git synced 2026-02-03 18:13:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Don't report BMI support when AVX support is missing.

Browse Source 
Bug #326113. This is a bit conservative, but it is what the linux kernel
also seems to be doing. If AVX support is missing (because the OS doesn't
save the wide registers), then also don't report supporting BMI.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13656
This commit is contained in:
Mark Wielaard 2013-10-18 13:11:05 +00:00
parent ab319a7e24
commit e671b086cf
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
coregrind/m_machine.c
View File

@ -868,13 +868,13 @@ Bool VG_(machine_get_hwcaps)( void )
have_rdtscp = (edx & (1<<27)) != 0; /* True => have RDTSVCP */
}
/* Check for BMI1 and AVX2. */
/* Check for BMI1 and AVX2. If we have AVX1 (plus OS support). */
have_bmi = False;
have_avx2 = False;
if (max_basic >= 7) {
if (have_avx && max_basic >= 7) {
VG_(cpuid)(7, 0, &eax, &ebx, &ecx, &edx);
have_bmi = (ebx & (1<<3)) != 0; /* True => have BMI1 */
have_avx2 = have_avx && ((ebx & (1<<5)) != 0); /* True => have AVX2 */
have_avx2 = (ebx & (1<<5)) != 0; /* True => have AVX2 */
}
va = VexArchAMD64;