Re: [PATCH v6 02/14] disas/riscv: Fix vsetivli disassembly

[Pierrick Bouvier <pierrick.bouvier@linaro.org>]

On 10/16/24 12:31, Richard Henderson wrote:
> The first immediate field is unsigned, whereas operand_vimm
> extracts a signed value.  There is no need to mask the result
> with 'u'; just print the immediate with 'i'.
> 
> Fixes: 07f4964d178 ("disas/riscv.c: rvv: Add disas support for vector instructions")
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   disas/riscv.h | 2 +-
>   disas/riscv.c | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/disas/riscv.h b/disas/riscv.h
> index 16a08e4895..0d1f89ce8a 100644
> --- a/disas/riscv.h
> +++ b/disas/riscv.h
> @@ -290,7 +290,7 @@ enum {
>   #define rv_fmt_fd_vs2                 "O\t3,F"
>   #define rv_fmt_vd_vm                  "O\tDm"
>   #define rv_fmt_vsetvli                "O\t0,1,v"
> -#define rv_fmt_vsetivli               "O\t0,u,v"
> +#define rv_fmt_vsetivli               "O\t0,i,v"
>   #define rv_fmt_rs1_rs2_zce_ldst       "O\t2,i(1)"
>   #define rv_fmt_push_rlist             "O\tx,-i"
>   #define rv_fmt_pop_rlist              "O\tx,i"
> diff --git a/disas/riscv.c b/disas/riscv.c
> index 5965574d87..fc0331b90b 100644
> --- a/disas/riscv.c
> +++ b/disas/riscv.c
> @@ -4808,7 +4808,7 @@ static void decode_inst_operands(rv_decode *dec, rv_isa isa)
>           break;
>       case rv_codec_vsetivli:
>           dec->rd = operand_rd(inst);
> -        dec->imm = operand_vimm(inst);
> +        dec->imm = extract32(inst, 15, 5);
>           dec->vzimm = operand_vzimm10(inst);
>           break;
>       case rv_codec_zcb_lb:

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>