Re: [PATCH 4/6] target/riscv: Add amocas.[b|h] for Zabha

[Alistair Francis]

On Thu, May 23, 2024 at 10:44 PM LIU Zhiwei
<zhiwei_...@linux.alibaba.com> wrote:
>
> Signed-off-by: LIU Zhiwei <zhiwei_...@linux.alibaba.com>

Reviewed-by: Alistair Francis <alistair.fran...@wdc.com>

Alistair

> ---
>  target/riscv/insn32.decode                  |  2 ++
>  target/riscv/insn_trans/trans_rvzabha.c.inc | 14 ++++++++++++++
>  2 files changed, 16 insertions(+)
>
> diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
> index 8a4801d442..eee48f92d3 100644
> --- a/target/riscv/insn32.decode
> +++ b/target/riscv/insn32.decode
> @@ -1041,3 +1041,5 @@ amomin_h   10000 . . ..... ..... 001 ..... 0101111 
> @atom_st
>  amomax_h   10100 . . ..... ..... 001 ..... 0101111 @atom_st
>  amominu_h  11000 . . ..... ..... 001 ..... 0101111 @atom_st
>  amomaxu_h  11100 . . ..... ..... 001 ..... 0101111 @atom_st
> +amocas_b    00101 . . ..... ..... 000 ..... 0101111 @atom_st
> +amocas_h    00101 . . ..... ..... 001 ..... 0101111 @atom_st
> diff --git a/target/riscv/insn_trans/trans_rvzabha.c.inc 
> b/target/riscv/insn_trans/trans_rvzabha.c.inc
> index 9093a1cfc1..ce8edcba62 100644
> --- a/target/riscv/insn_trans/trans_rvzabha.c.inc
> +++ b/target/riscv/insn_trans/trans_rvzabha.c.inc
> @@ -129,3 +129,17 @@ static bool trans_amomaxu_h(DisasContext *ctx, 
> arg_amomaxu_h *a)
>      REQUIRE_ZABHA(ctx);
>      return gen_amo(ctx, a, &tcg_gen_atomic_fetch_umax_tl, MO_TESW);
>  }
> +
> +static bool trans_amocas_b(DisasContext *ctx, arg_amocas_b *a)
> +{
> +    REQUIRE_ZACAS(ctx);
> +    REQUIRE_ZABHA(ctx);
> +    return gen_cmpxchg(ctx, a, MO_SB);
> +}
> +
> +static bool trans_amocas_h(DisasContext *ctx, arg_amocas_h *a)
> +{
> +    REQUIRE_ZACAS(ctx);
> +    REQUIRE_ZABHA(ctx);
> +    return gen_cmpxchg(ctx, a, MO_ALIGN | MO_TESW);
> +}
> --
> 2.25.1
>
>