diff options
| author | Philip Guenther <guenther@cvs.openbsd.org> | 2018-07-09 08:35:37 +0000 |
|---|---|---|
| committer | Philip Guenther <guenther@cvs.openbsd.org> | 2018-07-09 08:35:37 +0000 |
| commit | 8ec85843e26ccee916838de03148822e83d81116 (patch) | |
| tree | 0a2da43d3e98da59d5cd6ce64aa70932a5498883 | |
| parent | 3ab43a6ad86b9da0b303276086a030b2f67abff0 (diff) | |
Use a slightly more efficient zeroing idiom when clearing GPRs
ok mlarkin@ mortimer@
| -rw-r--r-- | sys/arch/amd64/include/frameasm.h | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/sys/arch/amd64/include/frameasm.h b/sys/arch/amd64/include/frameasm.h index 8fffbfdce2b..0c5a6a7f881 100644 --- a/sys/arch/amd64/include/frameasm.h +++ b/sys/arch/amd64/include/frameasm.h @@ -1,4 +1,4 @@ -/* $OpenBSD: frameasm.h,v 1.16 2018/06/14 19:57:29 guenther Exp $ */ +/* $OpenBSD: frameasm.h,v 1.17 2018/07/09 08:35:36 guenther Exp $ */ /* $NetBSD: frameasm.h,v 1.1 2003/04/26 18:39:40 fvdl Exp $ */ #ifndef _AMD64_MACHINE_FRAMEASM_H @@ -42,19 +42,19 @@ */ #define INTR_CLEAR_GPRS \ xorl %eax,%eax ; \ - movl %eax,%ebx ; \ - movl %eax,%ecx ; \ - movl %eax,%edx ; \ - movl %eax,%esi ; \ - movl %eax,%edi ; \ - movl %eax,%r8d ; \ - movl %eax,%r9d ; \ - movl %eax,%r10d ; \ - movl %eax,%r11d ; \ - movl %eax,%r12d ; \ - movl %eax,%r13d ; \ - movl %eax,%r14d ; \ - movl %eax,%r15d + xorl %ebx,%ebx ; \ + xorl %ecx,%ecx ; \ + xorl %edx,%edx ; \ + xorl %esi,%esi ; \ + xorl %edi,%edi ; \ + xorl %r8d,%r8d ; \ + xorl %r9d,%r9d ; \ + xorl %r10d,%r10d ; \ + xorl %r11d,%r11d ; \ + xorl %r12d,%r12d ; \ + xorl %r13d,%r13d ; \ + xorl %r14d,%r14d ; \ + xorl %r15d,%r15d /* For real interrupt code paths, where we can come from userspace */ |