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Re: [PATCH, take 2] Fix PR target/28946

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 <>
>        PR target/28946
>        * config/i386/ ("*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

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