Re: [PATCH 2/2] target/riscv: Implement dump content of vector register

[Weiwei Li]

在 2022/7/8 下午4:57, Kito Cheng 写道:
> Implement -d cpu,vu to dump content of vector register.
>
> Signed-off-by: Kito Cheng <kito.cheng@sifive.com>
> ---
>   target/riscv/cpu.c | 31 +++++++++++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index c1b96da7da..97b289d277 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -72,6 +72,15 @@ const char * const riscv_fpr_regnames[] = {
>     "f30/ft10", "f31/ft11"
>   };
>   
> +const char * const riscv_vr_regnames[] = {
> +  "v0",  "v1",  "v2",  "v3",  "v4",  "v5",
> +  "v6",  "v7",  "v8",  "v9",  "v10", "v11",
> +  "v12", "v13", "v14", "v15", "v16", "v17",
> +  "v18", "v19", "v20", "v21", "v22", "v23",
> +  "v24", "v25", "v26", "v27", "v28", "v29",
> +  "v30", "v31"
> +};
> +
>   static const char * const riscv_excp_names[] = {
>       "misaligned_fetch",
>       "fault_fetch",
> @@ -375,6 +384,28 @@ static void riscv_cpu_dump_state(CPUState *cs, FILE *f, 
> int flags)
>               }
>           }
>       }
> +    if (flags & CPU_DUMP_VU) {
> +        int vlen = cpu->cfg.vlen;
> +        int n_chunk = vlen / 64;
> +        if (vlen == 32) {
> +            for (i = 0; i < 32; i++) {
> +                qemu_fprintf(f, "0x%08" PRIx64 "\n", env->vreg[i]);
> +            }

Seems forget to dump the riscv_vr_regnames here.

Just another question: whether is it necessary to dump the vector 
related csrs too?

Regards,

Weiwei Li

> +        } else {
> +            for (i = 0; i < 32; i++) {
> +                qemu_fprintf(f, " %-8s ",
> +                             riscv_vr_regnames[i]);
> +
> +                int vec_reg_offset = i * vlen / 64;
> +                qemu_fprintf(f, "0x");
> +                for (int j = n_chunk - 1; j >= 0; --j) {
> +                    qemu_fprintf(f, "%016" PRIx64,
> +                                 env->vreg[vec_reg_offset + j]);
> +                }
> +                qemu_fprintf(f, "\n");
> +            }
> +        }
> +    }
>   }
>   
>   static void riscv_cpu_set_pc(CPUState *cs, vaddr value)