Re: [Qemu-devel] [PATCH] tci: Add implementation of rotl_i64, rotr_i64

[Stefan Weil <sw@weilnetz.de>]

Am 04.09.2013 22:49, schrieb Stefan Weil:
> It is used by qemu-ppc64 when running Debian's busybox-static.
>
> Signed-off-by: Stefan Weil <sw@weilnetz.de>
> ---
>
> This patch is also useful for QEMU 1.6.

... so I should have added qemu-stable. Done now.

>
>  tcg/tci/tcg-target.c |    1 -
>  tci.c                |   10 +++++++++-
>  2 files changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/tcg/tci/tcg-target.c b/tcg/tci/tcg-target.c
> index 233ab3b..4976bec 100644
> --- a/tcg/tci/tcg-target.c
> +++ b/tcg/tci/tcg-target.c
> @@ -670,7 +670,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
>      case INDEX_op_shl_i64:
>      case INDEX_op_shr_i64:
>      case INDEX_op_sar_i64:
> -        /* TODO: Implementation of rotl_i64, rotr_i64 missing in tci.c. */
>      case INDEX_op_rotl_i64:     /* Optional (TCG_TARGET_HAS_rot_i64). */
>      case INDEX_op_rotr_i64:     /* Optional (TCG_TARGET_HAS_rot_i64). */
>          tcg_out_r(s, args[0]);
> diff --git a/tci.c b/tci.c
> index 18c888e..94b7851 100644
> --- a/tci.c
> +++ b/tci.c
> @@ -952,8 +952,16 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
>              break;
>  #if TCG_TARGET_HAS_rot_i64
>          case INDEX_op_rotl_i64:
> +            t0 = *tb_ptr++;
> +            t1 = tci_read_ri64(&tb_ptr);
> +            t2 = tci_read_ri64(&tb_ptr);
> +            tci_write_reg64(t0, (t1 << t2) | (t1 >> (64 - t2)));
> +            break;
>          case INDEX_op_rotr_i64:
> -            TODO();
> +            t0 = *tb_ptr++;
> +            t1 = tci_read_ri64(&tb_ptr);
> +            t2 = tci_read_ri64(&tb_ptr);
> +            tci_write_reg64(t0, (t1 >> t2) | (t1 << (64 - t2)));
>              break;
>  #endif
>  #if TCG_TARGET_HAS_deposit_i64