From: Kito Cheng <kito.cheng@gmail.com>
To: Philipp Tomsich <philipp.tomsich@vrull.eu>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>, wilson@tuliptree.org
Subject: Re: [PATCH v1 2/8] RISC-V: costs: handle BSWAP
Date: Wed, 17 Nov 2021 22:52:37 +0800 [thread overview]
Message-ID: <CA+yXCZA4iEq9ts3vgvPg+i+HaMAwuna1-7TywOLM5sg=qZgj6A@mail.gmail.com> (raw)
In-Reply-To: <20211111141020.2738001-3-philipp.tomsich@vrull.eu>
> diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
> index c77b0322869..8480cf09294 100644
> --- a/gcc/config/riscv/riscv.c
> +++ b/gcc/config/riscv/riscv.c
> @@ -2131,6 +2131,14 @@ riscv_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno ATTRIBUTE_UN
> *total = riscv_extend_cost (XEXP (x, 0), GET_CODE (x) == ZERO_EXTEND);
> return false;
>
> + case BSWAP:
> + if (TARGET_ZBB)
> + {
> + *total = COSTS_N_INSNS (1);
Add a cost model for HImode? maybe `*total = COSTS_N_INSNS (mode ==
HImode ? 2 : 1);` ?
next prev parent reply other threads:[~2021-11-17 14:52 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 14:10 [PATCH v1 0/8] Improvements to bitmanip-1.0 (Zb[abcs]) support Philipp Tomsich
2021-11-11 14:10 ` [PATCH v1 1/8] bswap: synthesize HImode bswap from SImode or DImode Philipp Tomsich
2021-11-17 14:51 ` Kito Cheng
2021-11-19 10:20 ` Richard Biener
2021-11-19 10:21 ` Richard Biener
2021-11-11 14:10 ` [PATCH v1 2/8] RISC-V: costs: handle BSWAP Philipp Tomsich
2021-11-17 14:52 ` Kito Cheng [this message]
2021-11-11 14:10 ` [PATCH v1 3/8] RISC-V: costs: support shift-and-add in strength-reduction Philipp Tomsich
2021-11-11 14:10 ` [PATCH v1 4/8] RISC-V: bitmanip: fix constant-loading for (1ULL << 31) in DImode Philipp Tomsich
2021-11-11 14:10 ` [PATCH v1 5/8] RISC-V: bitmanip: improvements to rotate instructions Philipp Tomsich
2021-11-11 14:10 ` [PATCH v1 6/8] RISC-V: bitmanip: add splitter to use bexti for "(a & (1 << BIT_NO)) ? 0 : -1" Philipp Tomsich
2021-11-18 9:45 ` Kito Cheng
2021-11-11 14:10 ` [PATCH v1 7/8] RISC-V: bitmanip: add orc.b as an unspec Philipp Tomsich
2021-11-11 14:10 ` [PATCH v1 8/8] RISC-V: bitmanip: relax minmax to operate on GPR Philipp Tomsich
2021-11-11 16:00 ` Kito Cheng
2021-11-11 16:18 ` Philipp Tomsich
2021-11-11 16:27 ` Kito Cheng
2021-11-11 16:42 ` Kito Cheng
2021-11-11 18:33 ` Philipp Tomsich
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