PING^2 [PATCH] rs6000: Support more short/char to float conversion

Kewen.Lin linkw@linux.ibm.com
Wed Jun 9 02:29:28 GMT 2021


Hi,

Gentle ping this:

  https://gcc.gnu.org/pipermail/gcc-patches/2021-May/569792.html

BR,
Kewen

on 2021/5/26 上午11:02, Kewen.Lin via Gcc-patches wrote:
> Hi,
> 
> Gentle ping this:
> 
>   https://gcc.gnu.org/pipermail/gcc-patches/2021-May/569792.html
> 
> 
> BR,
> Kewen
> 
> on 2021/5/7 上午10:30, Kewen.Lin via Gcc-patches wrote:
>> Hi,
>>
>> For some cases that when we load unsigned char/short values from
>> the appropriate unsigned char/short memories and convert them to
>> double/single precision floating point value, there would be
>> implicit conversions to int first.  It makes GCC not leverage the
>> P9 instructions lxsibzx/lxsihzx.  This patch is to add the related
>> define_insn_and_split to support this kind of scenario.
>>
>> Bootstrapped/regtested on powerpc64le-linux-gnu P9 and
>> powerpc64-linux-gnu P8.
>>
>> Is it ok for trunk?
>>
>> BR,
>> Kewen
>> ------
>> gcc/ChangeLog:
>>
>> 	* config/rs6000/rs6000.md
>> 	(floatsi<SFDF:mode>2_lfiwax_<QHI:mode>_mem_zext): New
>> 	define_insn_and_split.
>>
>> gcc/testsuite/ChangeLog:
>>
>> 	* gcc.target/powerpc/p9-fpcvt-3.c: New test.
>>
> 


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