Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1724450
| From | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH 3/4] x86/asm: Make alternative macro interfaces more clear and consistent |
| Date | 2017-08-31 19:40 +0200 |
| Message-ID | <ukBBE-ap-27@gated-at.bofh.it> (permalink) |
| References | <ukyu5-6Gt-5@gated-at.bofh.it> <ukyu5-6Gt-7@gated-at.bofh.it> <ukAmd-7Ri-9@gated-at.bofh.it> <ukBrY-4T-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Aug 31, 2017 at 12:25:42PM -0500, Josh Poimboeuf wrote: > 2) Put "sp" in the clobbers list instead of as an i/o constraint. This > mostly works for GCC, and doesn't break clang. However, it causes > GCC to insert a "lea -0x10(%rbp),%rsp" in the epilogue of every > affected function. And maybe this extra instruction is negligible for performance and not a big deal? I might look at this one after the holiday too. -- Josh
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[RFC PATCH 0/4] x86/asm: Add ASM_CALL() macro for inline asms with call instructions Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 16:20 +0200
[RFC PATCH 3/4] x86/asm: Make alternative macro interfaces more clear and consistent Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 16:20 +0200
Re: [RFC PATCH 3/4] x86/asm: Make alternative macro interfaces more clear and consistent Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-31 18:20 +0200
Re: [RFC PATCH 3/4] x86/asm: Make alternative macro interfaces more clear and consistent Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 19:30 +0200
Re: [RFC PATCH 3/4] x86/asm: Make alternative macro interfaces more clear and consistent Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 19:40 +0200
Re: [RFC PATCH 3/4] x86/asm: Make alternative macro interfaces more clear and consistent Ingo Molnar <mingo@kernel.org> - 2017-09-02 12:40 +0200
[RFC PATCH 2/4] x86/asm: Convert some inline asm positional operands to named operands Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 16:20 +0200
[RFC PATCH 1/4] x86/paravirt: Fix output constraint macro names Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 16:20 +0200
[RFC PATCH 4/4] x86/asm: Use ASM_CALL() macro for inline asm statements with call instructions Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 16:20 +0200
Re: [RFC PATCH 4/4] x86/asm: Use ASM_CALL() macro for inline asm statements with call instructions Peter Zijlstra <peterz@infradead.org> - 2017-08-31 17:00 +0200
Re: [RFC PATCH 4/4] x86/asm: Use ASM_CALL() macro for inline asm statements with call instructions Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-31 17:30 +0200
Re: [RFC PATCH 4/4] x86/asm: Use ASM_CALL() macro for inline asm statements with call instructions Dmitry Vyukov <dvyukov@google.com> - 2017-08-31 17:50 +0200
csiph-web