On 12/15/23 13:52, juzhe.zh...@rivai.ai wrote:
> Do you mean :
>
> /* We need to use precomputed mask for such situation and such mask
> can only be computed in compile-time known size modes. */
> bool indices_fit_selector_p
> = GET_MODE_BITSIZE (GET_MODE_INNER (vmode)) > 8 ||
r_p && !vec_len.is_constant ())
return false;
juzhe.zh...@rivai.ai
From: Robin Dapp
Date: 2023-12-15 20:44
To: juzhe.zh...@rivai.ai; gcc-patches
CC: rdapp.gcc; kito.cheng; Kito.cheng; jeffreyalaw
Subject: Re: [PATCH] RISC-V: Fix vmerge optimization bug in vec_perm
vectorization
> Oh. I t
> Oh. I think it should be renamed into not_fit.
>
> Is this following make sense to you ?
>
> /* We need to use precomputed mask for such situation and such mask
> can only be computed in compile-time known size modes. */
> bool indices_not_fit_selector_p
> = maybe_ge (vec_len, 2
-patches
CC: rdapp.gcc; kito.cheng; Kito.cheng; jeffreyalaw
Subject: Re: [PATCH] RISC-V: Fix vmerge optimization bug in vec_perm
vectorization
On 12/15/23 13:16, juzhe.zh...@rivai.ai wrote:
>
>>> bool indices_fit_selector = maybe_ge (vec_len, 2 << GET_MODE_BITSIZE
>>> (GET_MODE_IN
ITSIZE (GET_MODE_INNER (vmode)) == 8、
&& indices_fit_selector_p
&& !vec_len.is_constant ())
return false;
juzhe.zh...@rivai.ai
From: Robin Dapp
Date: 2023-12-15 20:25
To: juzhe.zh...@rivai.ai; gcc-patches
CC: rdapp.gcc; kito.cheng; Kito.cheng; jeffreyalaw
Subject: Re: [PAT
On 12/15/23 13:16, juzhe.zh...@rivai.ai wrote:
>
>>> bool indices_fit_selector = maybe_ge (vec_len, 2 << GET_MODE_BITSIZE
>>> (GET_MODE_INNER (vmode)));
> No, I think it will make us miss some optimization.
>
> For example, for poly value [16,16] maybe_ge ([16,16], 65536) which makes us
>
rns can be used vmerge optimization.
juzhe.zh...@rivai.ai
From: Robin Dapp
Date: 2023-12-15 19:14
To: Juzhe-Zhong; gcc-patches
CC: rdapp.gcc; kito.cheng; kito.cheng; jeffreyalaw
Subject: Re: [PATCH] RISC-V: Fix vmerge optimization bug in vec_perm
vectorization
Hi Juzhe,
in general looks OK.
Hi Juzhe,
in general looks OK.
> + /* We need to use precomputed mask for such situation and such mask
> + can only be computed in compile-time known size modes. */
> + if (GET_MODE_BITSIZE (GET_MODE_INNER (vmode)) == 8 && maybe_ge (vec_len,
> 256)
> + && !vec_len.is_constant ())
>
This patch fixes the following FAILs in "full coverage" testing:
Running target
riscv-sim/-march=rv64gcv_zvl256b/-mabi=lp64d/-mcmodel=medlow/--param=riscv-autovec-lmul=m8/--param=riscv-autovec-preference=fixed-vlmax
FAIL: gcc.dg/vect/vect-strided-mult-char-ls.c -flto -ffat-lto-objects execution
