Re: [PATCH v2 08/13] target/riscv: Replace is_32bit with get_xl/get_xlen

[LIU Zhiwei]

On 2021/10/14 上午4:50, Richard Henderson wrote:
> In preparation for RV128, replace a simple predicate
> with a more versatile test.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: LIU Zhiwei<zhiwei_liu@c-sky.com>

Zhiwei
> ---
>   target/riscv/translate.c | 32 +++++++++++++++++---------------
>   1 file changed, 17 insertions(+), 15 deletions(-)
>
> diff --git a/target/riscv/translate.c b/target/riscv/translate.c
> index 7e7bb67d15..5724a62bb0 100644
> --- a/target/riscv/translate.c
> +++ b/target/riscv/translate.c
> @@ -91,16 +91,18 @@ static inline bool has_ext(DisasContext *ctx, uint32_t ext)
>   }
>   
>   #ifdef TARGET_RISCV32
> -# define is_32bit(ctx)  true
> +#define get_xl(ctx)    MXL_RV32
>   #elif defined(CONFIG_USER_ONLY)
> -# define is_32bit(ctx)  false
> +#define get_xl(ctx)    MXL_RV64
>   #else
> -static inline bool is_32bit(DisasContext *ctx)
> -{
> -    return ctx->xl == MXL_RV32;
> -}
> +#define get_xl(ctx)    ((ctx)->xl)
>   #endif
>   
> +static inline int get_xlen(DisasContext *ctx)
> +{
> +    return 16 << get_xl(ctx);
> +}
> +
>   /* The word size for this operation. */
>   static inline int oper_len(DisasContext *ctx)
>   {
> @@ -282,7 +284,7 @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong 
> imm)
>   static void mark_fs_dirty(DisasContext *ctx)
>   {
>       TCGv tmp;
> -    target_ulong sd = is_32bit(ctx) ? MSTATUS32_SD : MSTATUS64_SD;
> +    target_ulong sd = get_xl(ctx) == MXL_RV32 ? MSTATUS32_SD : MSTATUS64_SD;
>   
>       if (ctx->mstatus_fs != MSTATUS_FS) {
>           /* Remember the state change for the rest of the TB. */
> @@ -341,16 +343,16 @@ EX_SH(12)
>       }                              \
>   } while (0)
>   
> -#define REQUIRE_32BIT(ctx) do { \
> -    if (!is_32bit(ctx)) {       \
> -        return false;           \
> -    }                           \
> +#define REQUIRE_32BIT(ctx) do {    \
> +    if (get_xl(ctx) != MXL_RV32) { \
> +        return false;              \
> +    }                              \
>   } while (0)
>   
> -#define REQUIRE_64BIT(ctx) do { \
> -    if (is_32bit(ctx)) {        \
> -        return false;           \
> -    }                           \
> +#define REQUIRE_64BIT(ctx) do {    \
> +    if (get_xl(ctx) < MXL_RV64) {  \
> +        return false;              \
> +    }                              \
>   } while (0)
>   
>   static int ex_rvc_register(DisasContext *ctx, int reg)