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Re: [PATCH, take 2] Fix PR target/28946
- From: Rask Ingemann Lambertsen <rask at sygehus dot dk>
- To: Uros Bizjak <ubizjak at gmail dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, Roger Sayle <roger at eyesopen dot com>
- Date: Sat, 7 Oct 2006 10:49:07 +0200
- Subject: Re: [PATCH, take 2] Fix PR target/28946
- References: <5787cf470609050406q1846f74dk312431cafe456bf5@mail.gmail.com> <20060905150853.GJ29852@sygehus.dk> <44FDD0D0.90404@gmail.com>
On Tue, Sep 05, 2006 at 09:32:32PM +0200, Uros Bizjak wrote:
> Attached patch should implement missing patterns for all shift
> instructions (wheee...). It is currently bootstrapping on x86_64. A
> regression-test suite will run over night for c, c++ and fortran.
>
> 2006-09-06 Uros Bizjak <uros@kss-loka.si>
>
> PR target/28946
> * config/i386/i386.md ("*ashldi3_cconly_rex64", "*ashlsi3_cconly",
> "*ashlhi3_cconly", "*ashlqi3_cconly",
Should there be "one_bit" versions of these too? Shifts of one bit set
more flags than shifts of multiple bits.
> "*ashrdi3_one_bit_cconly_rex64",
> "*ashrdi3_cconly_rex64", "*ashrsi3_one_bit_cconly",
> "*ashrsi3_cconly",
> "*ashrhi3_one_bit_cconly", "*ashrhi3_cconly",
> "*ashrqi3_one_bit_cconly", "*ashrqi3_cconly",
> "*lshrdi3_cconly_one_bit_rex64", "*lshrdi3_cconly_rex64",
> "*lshrsi3_one_bit_cconly", "*lshrsi3_cconly",
> "*lshrhi3_one_bit_cconly", "*lshrhi3_cconly",
> "*lshrqi2_one_bit_cconly", "*lshrqi2_cconly": New patterns to
> implement only CC setting effects of shift instructions.
--
Rask Ingemann Lambertsen