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[Bug target/18668] use prescott's fisttp
- From: "uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Mar 2005 09:31:13 -0000
- Subject: [Bug target/18668] use prescott's fisttp
- References: <20041125010332.18668.commie1@gmx.net>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From uros at kss-loka dot si 2005-03-11 09:31 -------
Updated patch (no need for FLAGS_REG clobber and some mode macro stuff) at
http://gcc.gnu.org/ml/gcc-patches/2005-03/msg01119.html
Regarding comment #4:
I have the same thought as Ferdinand. fisttp insn should not be disabled by
-mno-sse3, that is why TARGET_FISTTP was introduced. As K8 isn't TARGET_FISTTP,
I see no problems here. However for AMD64 instruction set (without fisttp insn),
the generation of fistp and/or cvts?2si should remain exactly the same as
without fisttp patch: cvts?2siq for DImode operands and all -mfpmath settings.
Ferdinand, thanks for testing the patch!
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What |Removed |Added
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Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18668