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RE: Feature request concerning opcodes in the function prolog

From: Stefan Dösinger <stefan at codeweavers dot com>
To: "'H.J. Lu'" <hjl dot tools at gmail dot com>
Cc: <gcc at gcc dot gnu dot org>
Date: Wed, 7 Jan 2009 20:12:52 +0100
Subject: RE: Feature request concerning opcodes in the function prolog
References: <000a01c970f2$95e6d7a0$c1b486e0$@com> <6dc9ffc80901071032t7d93e63dvec747b393a6f18d5@mail.gmail.com>


> -----Original Message-----
> From: H.J. Lu [mailto:hjl.tools@gmail.com]
Nice to see a familiar face, or better, mail address :-)

> You need to check assembler feature with autconf before using them.
> See HAVE_AS_IX86_SAHF as example.
Thanks!

Does that look ok? It seems to detect the support correctly for me:

gcc_GAS_CHECK_FEATURE([swap suffix],
  gcc_cv_as_ix86_swap,,,
  [movl.s %esp, %ebp],,
  [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
  [Define if your assembler supports the swap suffix.])])

References:
- Feature request concerning opcodes in the function prolog
  - From: Stefan Dösinger
- Re: Feature request concerning opcodes in the function prolog
  - From: H.J. Lu

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