binvert_limb speedup on 64 bit machines with UHWtype

[Marco Bodrato]

Ciao,

Il 2022-02-27 18:13 Marco Bodrato ha scritto:
> I did never look into that file :-)

I inserted there a few more versions of binvert_limb.
The attached patch is only for testing, not to be pushed (I used 
uint_fast##_t types).

On shell I get the following:
@shell ~/gmp-repo]$ /var/tmp/bodrato/gmp/hg/build/tune/speed -p100000000 
-s 1 -rc binvert_limb binvert_limb_sec binvert_limb_pipe 
binvert_limb_uintfast
overhead 5.84 cycles, precision 100000000 units of 2.86e-10 secs, CPU 
freq 3500.09 MHz
    binvert_limb binvert_limb_sec binvert_limb_pipe binvert_limb_uintfast
1         28.39          1.0485          #0.8930           0.9999

The _sec version is 5% slower, and the _pipe one is 10% faster than the 
current.

Ĝis,
m
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