diff options
| author | Andy Polyakov <appro@openssl.org> | 2017-03-05 20:38:36 +0100 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2017-03-07 11:17:32 +0100 |
| commit | f8418d87e191e46b81e1b9548326ab2876fa0907 (patch) | |
| tree | b371b19a43510cbb29982cc39c8c0107180074b5 /crypto/x86_64cpuid.pl | |
| parent | ee6d9dfb39ff90a31027c51b80362d274918e3dd (diff) | |
| download | openssl-new-f8418d87e191e46b81e1b9548326ab2876fa0907.tar.gz | |
crypto/x86_64cpuid.pl: move extended feature detection upwards.
Exteneded feature flags were not pulled on AMD processors, as result a
number of extensions were effectively masked on Ryzen. It should have
been reported for Excavator since it implements AVX2 extension, but
apparently nobody noticed or cared...
Reviewed-by: Rich Salz <rsalz@openssl.org>
Diffstat (limited to 'crypto/x86_64cpuid.pl')
| -rw-r--r-- | crypto/x86_64cpuid.pl | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/crypto/x86_64cpuid.pl b/crypto/x86_64cpuid.pl index e08e1c4a11..c2a7d72b0e 100644 --- a/crypto/x86_64cpuid.pl +++ b/crypto/x86_64cpuid.pl @@ -72,6 +72,16 @@ OPENSSL_ia32_cpuid: cpuid mov %eax,%r11d # max value for standard query level + cmp \$7,%eax + jb .Lno_extended_info + + mov \$7,%eax + xor %ecx,%ecx + cpuid + mov %ebx,8(%rdi) + +.Lno_extended_info: + xor %eax,%eax cmp \$0x756e6547,%ebx # "Genu" setne %al @@ -136,14 +146,6 @@ OPENSSL_ia32_cpuid: shr \$14,%r10d and \$0xfff,%r10d # number of cores -1 per L1D - cmp \$7,%r11d - jb .Lnocacheinfo - - mov \$7,%eax - xor %ecx,%ecx - cpuid - mov %ebx,8(%rdi) - .Lnocacheinfo: mov \$1,%eax cpuid |