> On Nov 10, 2020, at 6:09 PM, Jeff Law via Gcc-patches 
> <gcc-patches@gcc.gnu.org> wrote:
> 
>> ...
>> ChangeLog
>> 
>> gcc/
>>     PR target/77510
>>     * config/mips/gs464.md: Reduce reservation
>>     duration to 10 cycles.
>>     * config/mips/i6400.md: Likewise.
>>     * config/mips/m5100.md: Likewise.
>>     * config/mips/p5600.md: Likewise.
>>     * config/mips/p6600.md: Likewise.
>>     * config/mips/xlp.md: Likewise.
>>     * config/mips/xlr.md: Likewise.
> 
> I doubt there's a measurable performance penalty for not fully modeling
> the latency of these instructions, but I'm quite hesitant to ACK this
> change without hearing from others in the MIPS space.   Alternately, if
> the affected models aren't being sold anymore, then I wouldn't worry
> about getting feedback on them.
> 
> 
> Jeff

XLR and XLP are listed as active products on their manufacturer's website 
(Broadcom).  I don't know about the others.  

        paul


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