Re: [PATCH 2/3] target/hppa: Fix assemble_11a insns for wide mode

[Helge Deller]

On 3/3/24 03:19, Richard Henderson wrote:
> Reported-by: Sven Schnelle <svens@stackframe.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/hppa/insns.decode |  7 ++++---
>   target/hppa/translate.c  | 23 +++++++++++++++++------
>   2 files changed, 21 insertions(+), 9 deletions(-)
>
> diff --git a/target/hppa/insns.decode b/target/hppa/insns.decode
> index 0d9f8159ec..9c6f92444c 100644
> --- a/target/hppa/insns.decode
> +++ b/target/hppa/insns.decode
> @@ -24,7 +24,7 @@
>   %assemble_sr3   13:1 14:2
>   %assemble_sr3x  13:1 14:2 !function=expand_sr3x
>
> -%assemble_11a   0:s1 4:10            !function=expand_shl3
> +%assemble_11a   4:12 0:1             !function=expand_11a
>   %assemble_12    0:s1 2:1 3:10        !function=expand_shl2
>   %assemble_12a   0:s1 3:11            !function=expand_shl2
>   %assemble_16    0:16                 !function=expand_16
> @@ -305,8 +305,9 @@ fstd            001011 ..... ..... .. . 1 -- 100 0 . .....  
>     @fldstdi
>   # Offset Mem
>   ####
>
> -@ldstim11       ...... b:5 t:5 sp:2 ..............      \
> -                &ldst disp=%assemble_11a m=%ma2_to_m x=0 scale=0 size=3
> +@ldstim11       ...... b:5 t:5 ................          \
> +                &ldst sp=%assemble_sp disp=%assemble_11a \
> +                m=%ma2_to_m x=0 scale=0 size=3
>   @ldstim14       ...... b:5 t:5 ................          \
>                   &ldst sp=%assemble_sp disp=%assemble_16  \
>                   x=0 scale=0 m=0
> diff --git a/target/hppa/translate.c b/target/hppa/translate.c
> index 585d836959..6dcc74e681 100644
> --- a/target/hppa/translate.c
> +++ b/target/hppa/translate.c
> @@ -121,12 +121,6 @@ static int expand_shl2(DisasContext *ctx, int val)
>       return val << 2;
>   }
>
> -/* Used for fp memory ops.  */
> -static int expand_shl3(DisasContext *ctx, int val)
> -{
> -    return val << 3;
> -}
> -
>   /* Used for assemble_21.  */
>   static int expand_shl11(DisasContext *ctx, int val)
>   {
> @@ -144,6 +138,23 @@ static int assemble_6(DisasContext *ctx, int val)
>       return (val ^ 31) + 1;
>   }
>
> +/* Expander for assemble_16a(s,cat(im10a,0),i). */

Typo above, should be assemble_11a().

Otherwise:
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>

> +static int expand_11a(DisasContext *ctx, int val)
> +{
> +    /*
> +     * @val is bit 0 and bits [4:15].
> +     * Swizzle thing around depending on PSW.W.
> +     */
> +    int im10a = extract32(val, 1, 10);
> +    int sp = extract32(val, 11, 2);
> +    int i = (-(val & 1) << 13) | (im10a << 3);
> +
> +    if (ctx->tb_flags & PSW_W) {
> +        i ^= sp << 13;
> +    }
> +    return i;
> +}
> +
>   /* Expander for assemble_16(s,im14). */
>   static int expand_16(DisasContext *ctx, int val)
>   {