Re: [PATCH] disas/riscv: Add decode for Zawrs extension

[Alistair Francis]

On Wed, Jun 26, 2024 at 7:43 PM Rob Bradford <rbradford@rivosinc.com> wrote:
>
> From: Balaji Ravikumar <bravikumar@rivosinc.com>
>
> Add disassembly support for these instructions from Zawrs:
>
> * wrs.sto
> * wrs.nto
>
> Signed-off-by: Balaji Ravikumar <bravikumar@rivosinc.com>
> Signed-off-by: Rob Bradford <rbradford@rivosinc.com>

Acked-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  disas/riscv.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/disas/riscv.c b/disas/riscv.c
> index 90d6b26de9..e79788ea0a 100644
> --- a/disas/riscv.c
> +++ b/disas/riscv.c
> @@ -906,6 +906,8 @@ typedef enum {
>      rv_op_amocas_w = 875,
>      rv_op_amocas_d = 876,
>      rv_op_amocas_q = 877,
> +    rv_op_wrs_sto = 878,
> +    rv_op_wrs_nto = 879,
>  } rv_op;
>
>  /* register names */
> @@ -2096,6 +2098,8 @@ const rv_opcode_data rvi_opcode_data[] = {
>      { "amocas.w", rv_codec_r_a, rv_fmt_aqrl_rd_rs2_rs1, NULL, 0, 0, 0 },
>      { "amocas.d", rv_codec_r_a, rv_fmt_aqrl_rd_rs2_rs1, NULL, 0, 0, 0 },
>      { "amocas.q", rv_codec_r_a, rv_fmt_aqrl_rd_rs2_rs1, NULL, 0, 0, 0 },
> +    { "wrs.sto", rv_codec_none, rv_fmt_none, NULL, 0, 0, 0 },
> +    { "wrs.nto", rv_codec_none, rv_fmt_none, NULL, 0, 0, 0 },
>  };
>
>  /* CSR names */
> @@ -3817,6 +3821,8 @@ static void decode_inst_opcode(rv_decode *dec, rv_isa 
> isa)
>                      case 0: op = rv_op_ecall; break;
>                      case 32: op = rv_op_ebreak; break;
>                      case 64: op = rv_op_uret; break;
> +                    case 416: op = rv_op_wrs_nto; break;
> +                    case 928: op = rv_op_wrs_sto; break;
>                      }
>                      break;
>                  case 256:
> --
> 2.45.2
>
>