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| author | Tom Musta <tommusta@gmail.com> | 2014-08-25 14:25:39 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-09-08 12:50:52 +0200 |
| commit | ab92678d0a24e7ef8d4d93d18e5c0df8619874fe (patch) | |
| tree | b844600f35613ad53f9cd86448fd0a4fd7375fac /target-ppc/translate.c | |
| parent | 439ce1401bac1687c711cb6acf4ee8f3f457c05e (diff) | |
| download | qemu-ab92678d0a24e7ef8d4d93d18e5c0df8619874fe.zip qemu-ab92678d0a24e7ef8d4d93d18e5c0df8619874fe.tar.gz qemu-ab92678d0a24e7ef8d4d93d18e5c0df8619874fe.tar.bz2 | |
target-ppc: Special Case of rlwimi Should Use Deposit
The special case of rlwimi where MB <= ME and SH = 31-ME can be implemented
with a single TCG deposit operation. This replaces the less general case
of SH = MB = 0 and ME = 31.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Suggested-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/translate.c')
| -rw-r--r-- | target-ppc/translate.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 47dc903..095b83c 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -1636,12 +1636,9 @@ static void gen_rlwimi(DisasContext *ctx) mb = MB(ctx->opcode); me = ME(ctx->opcode); sh = SH(ctx->opcode); - if (likely(sh == 0 && mb == 0 && me == 31)) { -#if defined(TARGET_PPC64) - tcg_gen_mov_i64(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]); -#else - tcg_gen_ext32u_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]); -#endif + if (likely(sh == (31-me) && mb <= me)) { + tcg_gen_deposit_tl(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rA(ctx->opcode)], + cpu_gpr[rS(ctx->opcode)], sh, me - mb + 1); } else { target_ulong mask; TCGv t1; |