Ping^^^ [PATCH 0/4] rs6000: build constant via li/lis;rldicX

[Jiufu Guo <guojiufu@linux.ibm.com>]

Gentle ping...

Jiufu Guo via Gcc-patches <gcc-patches@gcc.gnu.org> writes:

> Hi,
>
> I would like to ping these patches.
> [0/4]
> https://gcc.gnu.org/pipermail/gcc-patches/2023-February/611286.html
> [1/4]
> https://gcc.gnu.org/pipermail/gcc-patches/2023-February/611287.html
> [2/4]
> https://gcc.gnu.org/pipermail/gcc-patches/2023-February/611288.html
> [3/4]
> https://gcc.gnu.org/pipermail/gcc-patches/2023-February/611289.html
> [4/4]
> https://gcc.gnu.org/pipermail/gcc-patches/2023-February/611290.html
>
> Any sugguestions for the code functionality/style or to make
> it easy for review, please point out, thanks in advance!
>
>
> BR,
> Jeff (Jiufu)
>
> Jiufu Guo via Gcc-patches <gcc-patches@gcc.gnu.org> writes:
>
>> Hi,
>>
>> Gental ping these patches:
>> https://gcc.gnu.org/pipermail/gcc-patches/2023-February/611286.html
>>
>> BR,
>> Jeff (Jiufu)
>>
>>
>> Jiufu Guo <guojiufu@linux.ibm.com> writes:
>>
>>> Hi,
>>>
>>> For a given constant, it would be profitable if we can use 2 insns to build.
>>> This patch enables more constants building through 2 insns: one is "li or lis",
>>> another is 'rldicl, rldicr or rldic'.
>>> Through checking and analyzing the characters of the insns "li/lis;rldicX",
>>> all the possible constant values are considered by this patch.
>>>
>>> Previously, a patch is posted, but it is too large.
>>> https://gcc.gnu.org/pipermail/gcc-patches/2022-September/601276.html
>>> As suggested, I split it into this series.
>>>
>>> Considering the functionality and size, 4 patches are split as below:
>>> 1. Support the constants which can be built by "li;rotldi"
>>>    Both positive and negative values from insn "li" are analyzed.
>>> 2. Support the constants which can be built by "lis;rotldi"
>>>    We only need to analyze the negative value from "lis".
>>>    And this patch uses more code to check leading 1s and tailing 0s from "lis".
>>> 3. Support the constants which can be built by "li/lis;rldicl/rldicr":
>>>    Leverage the APIs defined/analyzed in patches 1 and 2,
>>>    this patch checks the characters for the mask of "rldicl/rldicr"
>>>    to support more constants.
>>> 4. Support the constants which can be built by "li/lis;rldic":
>>>    The mask of "rldic" is relatively complicated, it is analyzed in this
>>>    patch to support more constants.
>>>
>>> BR,
>>> Jeff (Jiufu)