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Re: [PATCH] X86-64: Add -mskip-rax-setup
- From: Mike Stump <mrs at mrs dot kithrup dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: Gerald Pfeifer <gerald at pfeifer dot com>, Mike Stump <mikestump at comcast dot net>, Uros Bizjak <ubizjak at gmail dot com>, "H. Peter Anvin" <hpa at zytor dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Rasmus Villemoes <linux at rasmusvillemoes dot dk>, "x86 at kernel dot org" <x86 at kernel dot org>, Andi Kleen <andi at firstfloor dot org>, Ingo Molnar <mingo at redhat dot com>, Thomas Gleixner <tglx at linutronix dot de>
- Date: Sat, 27 Dec 2014 08:18:23 -0800
- Subject: Re: [PATCH] X86-64: Add -mskip-rax-setup
- Authentication-results: sourceware.org; auth=none
- References: <20141218131150 dot GA32638 at intel dot com> <CAFULd4ZaY5USX+CKdzoq1zWL8kZ3VqVx7KGxwb_tQEzbX03u-A at mail dot gmail dot com> <CAFULd4avYqhgA-D7+_w3b0Uk9jaso7JpXQXL2zU56Avs23i1og at mail dot gmail dot com> <CAFULd4asXmUnG+eYW9jyW7EQDLydTUnKUinW7yhRUo+cGauEVA at mail dot gmail dot com> <CAMe9rOq5FVz5D0ug12bzjBMG=VnwgN5H+t734FLPJ4ANXqrMVQ at mail dot gmail dot com> <CAFULd4ZzhaMu_JSXjPaKbaYSLbAa1P3pGcu_UkqEW05Ub4vksw at mail dot gmail dot com> <54930A0A dot 40207 at zytor dot com> <CAFULd4Y+XR-Op9FwAoPbN0y-BHiDOqdnEuxd1hUPKC8yKy-G5g at mail dot gmail dot com> <CAMe9rOpuXiUXTU30pyr+v9Z0dVCzh=_gdCCTataziSuJ_JMwVw at mail dot gmail dot com> <D9D50F9B-8E80-49DF-A34B-E71D48DF3BB0 at comcast dot net> <CAMe9rOpfWdbJ8ZrzyRdFws9XyrJdOJgndOxWiADJMjbDDo2=6w at mail dot gmail dot com> <alpine dot LSU dot 2 dot 11 dot 1412260606300 dot 4490 at tuna dot site> <CAMe9rOr6NBeGsWfd8npABVQ+=WyNfCZbAY8JMCZWPxTUMATFfw at mail dot gmail dot com>
On Dec 26, 2014, at 7:57 AM, "H.J. Lu" <hjl.tools@gmail.com> wrote:
> On Thu, Dec 25, 2014 at 9:07 PM, Gerald Pfeifer <gerald@pfeifer.com> wrote:
>> On Thursday 2014-12-18 11:35, H.J. Lu wrote:
>>> Updated.
>>
>> "the RAX register" (i.e., add "the"), and I suggest to make
>> this a sentence, similar to my previous mail for the other
>> update.
>>
>> This is fine with these changes.
>
> Done.
>
>> Thank you -- and that's a nice hack (in the positive sense)!
>>
>
> It really is a hack :-) and was suggested by Rasmus Villemoes.
So, my suggestion is similar, but different. Imagine you find 10 of these things over the years, 10 flags look horrible. I like the -mkernel style flag where all are bundled up under it, essentially it becomes the kernel API flag.