Messages in this thread | | | Date | Wed, 01 Oct 2014 11:35:27 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v3 2/2] x86_64: Don't save flags on context switch |
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On 10/01/2014 11:28 AM, Andy Lutomirski wrote: > > #define __EXTRA_CLOBBER \ > , "rcx", "rbx", "rdx", "r8", "r9", "r10", "r11", \ > - "r12", "r13", "r14", "r15" > + "r12", "r13", "r14", "r15", "flags" >
I was under the impression that gcc *always* assumes the flags were clobbered for an asm statement. Otherwise I think we'd have a lot of problems.
-hpa
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