On Thu, Mar 28, 2013 at 08:32:44AM -0700, Richard Henderson wrote:
> This allows the generation of RSB instructions.
>
> Signed-off-by: Richard Henderson <r...@twiddle.net>
> ---
> tcg/arm/tcg-target.c | 15 ++++++++++++---
> 1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
> index f470caa..7475142 100644
> --- a/tcg/arm/tcg-target.c
> +++ b/tcg/arm/tcg-target.c
> @@ -1665,8 +1665,17 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode
> opc,
> args[0], args[1], args[2], const_args[2]);
> break;
> case INDEX_op_sub_i32:
> - tcg_out_dat_rIN(s, COND_AL, ARITH_SUB, ARITH_ADD,
> - args[0], args[1], args[2], const_args[2]);
> + if (const_args[1]) {
> + if (const_args[2]) {
> + tcg_out_movi32(s, COND_AL, args[0], args[1] - args[2]);
> + } else {
> + tcg_out_dat_rI(s, COND_AL, ARITH_RSB,
> + args[0], args[2], args[1], 1);
> + }
> + } else {
> + tcg_out_dat_rIN(s, COND_AL, ARITH_SUB, ARITH_ADD,
> + args[0], args[1], args[2], const_args[2]);
> + }
> break;
> case INDEX_op_and_i32:
> tcg_out_dat_rIK(s, COND_AL, ARITH_AND, ARITH_BIC,
> @@ -1859,7 +1868,7 @@ static const TCGTargetOpDef arm_op_defs[] = {
>
> /* TODO: "r", "r", "ri" */
> { INDEX_op_add_i32, { "r", "r", "rIN" } },
> - { INDEX_op_sub_i32, { "r", "r", "rIN" } },
> + { INDEX_op_sub_i32, { "r", "rI", "rIN" } },
> { INDEX_op_mul_i32, { "r", "r", "r" } },
> { INDEX_op_mulu2_i32, { "r", "r", "r", "r" } },
> { INDEX_op_muls2_i32, { "r", "r", "r", "r" } },
Reviewed-by: Aurelien Jarno <aurel...@aurel32.net>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurel...@aurel32.net http://www.aurel32.net
