Re: [RFC PATCH 1/3] tcg/riscv: Fix base regsiter for qemu_ld/st

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 20/10/22 12:41, LIU Zhiwei wrote:
> When guest base is zero, we should use addr_regl as base regiser instead of

Typo "register" here and in patch subject.

> the initial register TCG_REG_TMP0.
> 
> Signed-off-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
> ---
>   tcg/riscv/tcg-target.c.inc | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc
> index 81a83e45b1..32f4bc7bfc 100644
> --- a/tcg/riscv/tcg-target.c.inc
> +++ b/tcg/riscv/tcg-target.c.inc
> @@ -1185,6 +1185,8 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
>       }
>       if (guest_base != 0) {
>           tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
> +    } else {
> +        base = addr_regl;
>       }
>       tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
>   #endif
> @@ -1257,6 +1259,8 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
>       }
>       if (guest_base != 0) {
>           tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
> +    } else {
> +        base = addr_regl;
>       }
>       tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
>   #endif

Maybe worth inverting the if statement, otherwise LGTM.