From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53368) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VuPtf-0006NV-9h for qemu-devel@nongnu.org; Sat, 21 Dec 2013 11:59:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VuPtY-0002Qz-J7 for qemu-devel@nongnu.org; Sat, 21 Dec 2013 11:59:27 -0500 Received: from hall.aurel32.net ([2001:bc8:30d7:101::1]:46550) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VuPtY-0002QT-CH for qemu-devel@nongnu.org; Sat, 21 Dec 2013 11:59:20 -0500 From: Aurelien Jarno Date: Sat, 21 Dec 2013 17:59:01 +0100 Message-Id: <1387645145-13069-5-git-send-email-aurelien@aurel32.net> In-Reply-To: <1387645145-13069-1-git-send-email-aurelien@aurel32.net> References: <1387645145-13069-1-git-send-email-aurelien@aurel32.net> Subject: [Qemu-devel] [PATCH 4/8] target-sh4: optimize subc using sub2 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Aurelien Jarno Signed-off-by: Aurelien Jarno --- target-sh4/translate.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/target-sh4/translate.c b/target-sh4/translate.c index 17b4abe..3af9ccd 100644 --- a/target-sh4/translate.c +++ b/target-sh4/translate.c @@ -882,18 +882,15 @@ static void _decode_opc(DisasContext * ctx) case 0x300a: /* subc Rm,Rn */ { TCGv t0, t1, t2; - t0 = tcg_temp_new(); + t0 = tcg_const_tl(0); t1 = tcg_temp_new(); - tcg_gen_sub_i32(t1, REG(B11_8), REG(B7_4)); - tcg_gen_sub_i32(t0, t1, cpu_sr_t); t2 = tcg_temp_new(); - tcg_gen_setcond_i32(TCG_COND_LTU, t2, REG(B11_8), t1); - tcg_gen_setcond_i32(TCG_COND_LTU, t1, t1, t0); - tcg_gen_or_i32(cpu_sr_t, t1, t2); - tcg_temp_free(t2); - tcg_temp_free(t1); - tcg_gen_mov_i32(REG(B11_8), t0); + tcg_gen_sub2_i32(t1, t2, REG(B11_8), t0, REG(B7_4), t0); + tcg_gen_sub2_i32(REG(B11_8), cpu_sr_t, t1, t2, cpu_sr_t, t0); + tcg_gen_andi_i32(cpu_sr_t, cpu_sr_t, 1); tcg_temp_free(t0); + tcg_temp_free(t1); + tcg_temp_free(t2); } return; case 0x300b: /* subv Rm,Rn */ -- 1.7.10.4