t; vadd.vv v4,v4,v8
> > sub a2,a2,a5
> > vsetvli zero,a5,e32,m4,ta,ma
> > vse32.v v4,0(a4)
> > add a0,a0,a3
> > add a1,a1,a3
> > add a4,a4,a3
> > bne a2,zero,.L3
> >
> > Fantastic architecture of GCC Vector Cost model!
> >
> > Th
Biener
Date: 2023-08-31 19:29
To: juzhe.zh...@rivai.ai
CC: gcc; richard.sandiford
Subject: Re: Re: Question about dynamic choosing vectorization factor for RVV
On Thu, 31 Aug 2023, juzhe.zh...@rivai.ai wrote:
> Hi. Thanks Richard and Richi.
>
> Now, I figure out how to choose sma
; > vse32.v v4,0(a0)
> > .L12:
> > ret
> > .L7:
> > li a2,0
> > j .L3
> > .L14:
> > ret
> >
> > I hope it can generate the code like this:
> >
> > foo:
> > ble a2,zero,.L5
> > mv a4,a0
> > .L3:
> > vsetvli a5,a2,e3
,v4,v8
> sub a2,a2,a5
> vsetvli zero,a5,e32,m4,ta,ma
> vse32.v v4,0(a4)
> add a0,a0,a3
> add a1,a1,a3
> add a4,a4,a3
> bne a2,zero,.L3
>
> Fantastic architecture of GCC Vector Cost model!
>
> Thanks a lot.
>
>
> juzhe.zh...@rivai.ai
>
> From: Richard Bi
diford
Subject: Re: Re: Question about dynamic choosing vectorization factor for RVV
On Thu, 31 Aug 2023, juzhe.zh...@rivai.ai wrote:
> Thanks Richi.
>
> I am trying to figure out how to adjust finish_cost to lower the LMUL
>
> For example:
>
> void
> foo (int32_t *__res
v v4,0(a4)
> add a0,a0,a3
> add a1,a1,a3
> add a4,a4,a3
> bne a2,zero,.L3
> .L5:
> ret
>
> I am experimenting whether we can adjust cost statically to make loop
> vectorizer use LMUL = 4 even though preferred_simd_mode return LMUL = 8.
> If we can do that, I think we can ap
"juzhe.zh...@rivai.ai" writes:
> Thanks Richi.
>
> I am trying to figure out how to adjust finish_cost to lower the LMUL
>
> For example:
>
> void
> foo (int32_t *__restrict a, int32_t *__restrict b, int n)
> {
> for (int i = 0; i < n; i++)
> a[i] = a[i] + b[i];
> }
>
> preferred_simd_mode p
though preferred_simd_mode return LMUL = 8.
If we can do that, I think we can apply analysis and then adjust the cost
according to analysis.
Thanks.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-08-31 15:38
To: juzhe.zh...@rivai.ai
CC: gcc; richard.sandiford
Subject: Re: Question about dynamic ch
On Thu, 31 Aug 2023, juzhe.zh...@rivai.ai wrote:
> Hi, Richard and Richi.
>
> Currently, we are statically returning vectorization factor in
> 'TARGET_VECTORIZE_PREFERRED_SIMD_MODE'
> according to compile option.
>
> For example:
> void
> foo (int32_t *__restrict a, int32_t *__restrict b, int n
Hi, Richard and Richi.
Currently, we are statically returning vectorization factor in
'TARGET_VECTORIZE_PREFERRED_SIMD_MODE'
according to compile option.
For example:
void
foo (int32_t *__restrict a, int32_t *__restrict b, int n)
{
for (int i = 0; i < n; i++)
a[i] = a[i] + b[i];
}
with --
10 matches
Mail list logo
