This is the mail archive of the libc-hacker@sourceware.org mailing list for the glibc project.
Note that libc-hacker is a closed list. You may look at the archives of this list, but subscription and posting are not open.
| Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
|---|---|---|
| Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
| Other format: | [Raw text] | |
2011-07-21 Andreas Schwab <schwab@redhat.com> * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix last change. (_dl_x86_64_save_sse): Use correct AVX check. --- sysdeps/x86_64/dl-trampoline.S | 21 +++++++++++++++------ 1 files changed, 15 insertions(+), 6 deletions(-) diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S index 1b97929..ad7479f 100644 --- a/sysdeps/x86_64/dl-trampoline.S +++ b/sysdeps/x86_64/dl-trampoline.S @@ -150,7 +150,8 @@ L(have_avx): cmpl $0x6, %eax // Nonzero if SSE and AVX state saving is enabled. sete %al -2: movl %eax, L(have_avx)(%rip) +2: leal -1(%eax,%eax), %eax + movl %eax, L(have_avx)(%rip) cmpl $0, %eax 1: js L(no_avx) @@ -183,11 +184,19 @@ _dl_x86_64_save_sse: movl $1, %eax cpuid movq %r11,%rbx # Restore rbx - movl $1, %eax - testl $(1 << 28), %ecx - jne 2f - negl %eax -2: movl %eax, L(have_avx)(%rip) + xorl %eax, %eax + // AVX and XSAVE supported? + testl $((1 << 28) | (1 << 27)), %ecx + je 2f + xorl %ecx, %ecx + // Get XFEATURE_ENABLED_MASK + xgetbv + andl $0x6, %eax + cmpl $0x6, %eax + // Nonzero if SSE and AVX state saving is enabled. + sete %al +2: leal -1(%eax,%eax), %eax + movl %eax, L(have_avx)(%rip) cmpl $0, %eax 1: js L(no_avx5) -- 1.7.6 -- Andreas Schwab, schwab@redhat.com GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E "And now for something completely different."
| Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
|---|---|---|
| Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |