Re: [Qemu-devel] [PATCH v2 04/18] tcg/aarch64: Implement field extraction opcodes

[Claudio Fontana]

On 18.10.2016 17:10, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <address@hidden>
> ---
>  tcg/aarch64/tcg-target.h     |  8 ++++----
>  tcg/aarch64/tcg-target.inc.c | 14 ++++++++++++++
>  2 files changed, 18 insertions(+), 4 deletions(-)
> 
> diff --git a/tcg/aarch64/tcg-target.h b/tcg/aarch64/tcg-target.h
> index 410c31b..4a74bd8 100644
> --- a/tcg/aarch64/tcg-target.h
> +++ b/tcg/aarch64/tcg-target.h
> @@ -63,8 +63,8 @@ typedef enum {
>  #define TCG_TARGET_HAS_nand_i32         0
>  #define TCG_TARGET_HAS_nor_i32          0
>  #define TCG_TARGET_HAS_deposit_i32      1
> -#define TCG_TARGET_HAS_extract_i32      0
> -#define TCG_TARGET_HAS_sextract_i32     0
> +#define TCG_TARGET_HAS_extract_i32      1
> +#define TCG_TARGET_HAS_sextract_i32     1
>  #define TCG_TARGET_HAS_movcond_i32      1
>  #define TCG_TARGET_HAS_add2_i32         1
>  #define TCG_TARGET_HAS_sub2_i32         1
> @@ -95,8 +95,8 @@ typedef enum {
>  #define TCG_TARGET_HAS_nand_i64         0
>  #define TCG_TARGET_HAS_nor_i64          0
>  #define TCG_TARGET_HAS_deposit_i64      1
> -#define TCG_TARGET_HAS_extract_i64      0
> -#define TCG_TARGET_HAS_sextract_i64     0
> +#define TCG_TARGET_HAS_extract_i64      1
> +#define TCG_TARGET_HAS_sextract_i64     1
>  #define TCG_TARGET_HAS_movcond_i64      1
>  #define TCG_TARGET_HAS_add2_i64         1
>  #define TCG_TARGET_HAS_sub2_i64         1
> diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c
> index 1939d35..c0e9890 100644
> --- a/tcg/aarch64/tcg-target.inc.c
> +++ b/tcg/aarch64/tcg-target.inc.c
> @@ -1640,6 +1640,16 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
>          tcg_out_dep(s, ext, a0, REG0(2), args[3], args[4]);
>          break;
>  
> +    case INDEX_op_extract_i64:
> +    case INDEX_op_extract_i32:
> +        tcg_out_ubfm(s, ext, a0, a1, a2, a2 + args[3] - 1);
> +        break;
> +
> +    case INDEX_op_sextract_i64:
> +    case INDEX_op_sextract_i32:
> +        tcg_out_sbfm(s, ext, a0, a1, a2, a2 + args[3] - 1);
> +        break;
> +

ah, probably missing something obvious.. not args[3]?



>      case INDEX_op_add2_i32:
>          tcg_out_addsub2(s, TCG_TYPE_I32, a0, a1, REG0(2), REG0(3),
>                          (int32_t)args[4], args[5], const_args[4],
> @@ -1785,6 +1795,10 @@ static const TCGTargetOpDef aarch64_op_defs[] = {
>  
>      { INDEX_op_deposit_i32, { "r", "0", "rZ" } },
>      { INDEX_op_deposit_i64, { "r", "0", "rZ" } },
> +    { INDEX_op_extract_i32, { "r", "r" } },
> +    { INDEX_op_extract_i64, { "r", "r" } },
> +    { INDEX_op_sextract_i32, { "r", "r" } },
> +    { INDEX_op_sextract_i64, { "r", "r" } },
>  
>      { INDEX_op_add2_i32, { "r", "r", "rZ", "rZ", "rA", "rMZ" } },
>      { INDEX_op_add2_i64, { "r", "r", "rZ", "rZ", "rA", "rMZ" } },
>