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| author | Oneric <oneric@oneric.stub> | 2021-12-05 23:00:47 +0100 |
|---|---|---|
| committer | Oneric <oneric@oneric.stub> | 2021-12-06 19:16:05 +0100 |
| commit | c75017b4e7ad686009c0ac14b7d9b22db4811aa1 (patch) | |
| tree | 0e8043f477c25ced75082d184e8bcab82295c8ff | |
| parent | 5fede0443b4e1b052ce2cd36c41d2196250ae3bf (diff) | |
| download | libass-c75017b4e7ad686009c0ac14b7d9b22db4811aa1.tar.bz2 libass-c75017b4e7ad686009c0ac14b7d9b22db4811aa1.tar.xz | |
x86: fix AVX detection
The removed check compared some bits from the vendor string to the ones
from "GenuineIntel". This blocked AVX and AVX2 from being used on
AMD- and other non-Intel-CPUs and even on Intel-CPUs if run in a
hypervisor or VM which changes the vendor string (eg " KVMKVMKVM ").
Drop the vendor check to utilise AVX on all supporting CPUs.
| -rw-r--r-- | libass/ass_utils.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/libass/ass_utils.c b/libass/ass_utils.c index 65b6f74..57f6306 100644 --- a/libass/ass_utils.c +++ b/libass/ass_utils.c @@ -52,9 +52,7 @@ int has_avx(void) ass_get_xgetbv(0, &eax, &edx); if ((eax & 0x6) != 0x6) return 0; - eax = 0; - ass_get_cpuid(&eax, &ebx, &ecx, &edx); - return (ecx & 0x6) == 0x6 ? (misc >> 28) & 0x1 : 0; // check high bits are relevant, then AVX support + return (misc >> 28) & 0x1; } int has_avx2(void) |