From: "Li, Pan2" <pan2.li@intel.com>
To: Jeff Law <jeffreyalaw@gmail.com>,
Juzhe-Zhong <juzhe.zhong@rivai.ai>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Cc: "kito.cheng@gmail.com" <kito.cheng@gmail.com>,
"kito.cheng@sifive.com" <kito.cheng@sifive.com>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"palmer@rivosinc.com" <palmer@rivosinc.com>,
"rdapp.gcc@gmail.com" <rdapp.gcc@gmail.com>
Subject: RE: [PATCH V2] RISC-V: Enable len_mask{load, store} and remove len_{load, store}
Date: Sun, 25 Jun 2023 13:52:08 +0000 [thread overview]
Message-ID: <MW5PR11MB59087B60737C3E93F348E575A921A@MW5PR11MB5908.namprd11.prod.outlook.com> (raw)
In-Reply-To: <b398ae2a-35aa-28bc-93f3-d25ead22e11e@gmail.com>
Committed, thanks Jeff.
Pan
-----Original Message-----
From: Gcc-patches <gcc-patches-bounces+pan2.li=intel.com@gcc.gnu.org> On Behalf Of Jeff Law via Gcc-patches
Sent: Sunday, June 25, 2023 8:53 PM
To: Juzhe-Zhong <juzhe.zhong@rivai.ai>; gcc-patches@gcc.gnu.org
Cc: kito.cheng@gmail.com; kito.cheng@sifive.com; palmer@dabbelt.com; palmer@rivosinc.com; rdapp.gcc@gmail.com
Subject: Re: [PATCH V2] RISC-V: Enable len_mask{load, store} and remove len_{load, store}
On 6/25/23 02:39, Juzhe-Zhong wrote:
> This patch enable len_mask_{load,store} to support flow-control in RVV auto-vectorization.
>
> Consider this following case:
> void
> f (int32_t *__restrict a,
> int32_t *__restrict b,
> int32_t *__restrict cond,
> int n)
> {
> for (int i = 0; i < n; i++)
> if (cond[i])
> a[i] = b[i];
> }
>
> Before this patch:
> <source>:9:21: missed: couldn't vectorize loop
> <source>:9:21: missed: not vectorized: control flow in loop.
>
> After this patch:
> f:
> ble a3,zero,.L5
> .L3:
> vsetvli a5,a3,e32,m1,ta,ma
> vle32.v v0,0(a2)
> vsetvli a6,zero,e32,m1,ta,ma
> slli a4,a5,2
> vmsne.vi v0,v0,0
> sub a3,a3,a5
> vsetvli zero,a5,e32,m1,ta,ma
> vle32.v v1,0(a1),v0.t
> vse32.v v1,0(a0),v0.t
> add a2,a2,a4
> add a1,a1,a4
> add a0,a0,a4
> bne a3,zero,.L3
> .L5:
> ret
>
>
> gcc/ChangeLog:
>
> * config/riscv/autovec.md (len_load_<mode>): Remove.
> (len_maskload<mode><vm>): Remove.
> (len_store_<mode>): New pattern.
> (len_maskstore<mode><vm>): New pattern.
> * config/riscv/predicates.md (autovec_length_operand): New predicate.
> * config/riscv/riscv-protos.h (enum insn_type): New enum.
> (expand_load_store): New function.
> * config/riscv/riscv-v.cc (emit_vlmax_masked_insn): Ditto.
> (emit_nonvlmax_masked_insn): Ditto.
> (expand_load_store): Ditto.
> * config/riscv/riscv-vector-builtins.cc (function_expander::use_contiguous_store_insn): Add avl_type operand into pred_store.
> * config/riscv/vector.md: Ditto.
OK
jeff
prev parent reply other threads:[~2023-06-25 13:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-25 8:39 Juzhe-Zhong
2023-06-25 12:52 ` Jeff Law
2023-06-25 13:52 ` Li, Pan2 [this message]
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