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Tue, 25 Oct 2016 15:23:59 +0000 (UTC) Received: from localhost ([::1]:55403 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bz3a1-0002gx-Ti for patchwork-qemu-devel@patchwork.kernel.org; Tue, 25 Oct 2016 11:23:57 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60438) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bz33y-00009t-HR for qemu-devel@nongnu.org; Tue, 25 Oct 2016 10:50:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bz33u-00066Q-9R for qemu-devel@nongnu.org; Tue, 25 Oct 2016 10:50:50 -0400 Received: from mout.kundenserver.de ([212.227.126.134]:61875) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1bz33t-00065M-SJ for qemu-devel@nongnu.org; Tue, 25 Oct 2016 10:50:46 -0400 Received: from Quad.localdomain ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue003) with ESMTPSA (Nemesis) id 0Ld1ZU-1ch9Jy0xJQ-00iD45; Tue, 25 Oct 2016 16:50:42 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Date: Tue, 25 Oct 2016 16:50:21 +0200 Message-Id: <1477407021-30755-24-git-send-email-laurent@vivier.eu> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1477407021-30755-1-git-send-email-laurent@vivier.eu> References: <1477407021-30755-1-git-send-email-laurent@vivier.eu> X-Provags-ID: V03:K0:bVSQn0qG97mvKqsRGDqvUTkmj4Ti7Xnqbl4ixOnkpwBPCNryjlE fit86jMQPgUVzjlNR47iNBbiLoLdUVKplV+JhlQDFGz8A3LII3U7bEg3U4+FIbvAnSDfYjc mASOcV1AVYrAg6lTTEAOLWQBVUvB8aiR+NkzrCGKUeEZzNYexTWEj8XXVQC6Y79It60PPRk DmMyV3LTjlJjOVutj2apg== X-UI-Out-Filterresults: notjunk:1; V01:K0:mX/EQWKxQhg=:KLavyMDNVqQoumdMJ9GHVt TsE/OHERffuyH/JrrCEkGt4z0nphcHxKdE+P1+XZeJWblpAppzLUX62EHHpm9pGgfmQbmGnFD SR8E6mRCmLCwYy4JGVjrvIrT1Unjl/H/9vcd+I2pTlDLkfG7ZNucxjSnXfqt+ALIFW9618LZV zdXMxCcgZCrB61kWMBthWtOlbAKnIzxx5rhpKo2egm+e5YWqXdroZCn6vmNnbg6dKGbbKcE4+ yuM/mzqXSvli8l1Shop4b4mnW2163YXbLjf7ZWDrHytAEWZ2KtekWjjHtcjDS1x4PBXLJKZa1 JSZt4S3oTgV8mYGOBe+Zz+lbzbx46zJ0g/5yrGWU5mtsb+bAolOXY36AJipqfsvls9aMPodyr mWBXP9rT7vvX9Rr61vAQ896kySxrdzCWio19a+YzEbXEgdfDTNWDF2NTaUzzUZbRwXPezdvMy Xpg6BVLsm+DMVsncbzxHjNKU/sMXz8CzqeRJDXpvshboiy4+mUUsGW9o7wUHOnz0WvNQvVM5Z AVkml//tvoinB96s5aK0aBDgRiC+zUw7KtuWXfpE8JpUFUuStXaO1YbdGJNLDHnac6skH+PwZ N1DxpCzKr9Z9LvbXqRd6KyKQ6aalxSoDyIoUBTey4kiP7N2pTaMjcSD7Rk81YE3BOyh/3b5D+ qKlgiZndPx5yzKyn1i8k0rhzdTgLMsrakkz/LWxmFmb7bhH2z8tpRU/V4XdNyjfO/KD4= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.126.134 Subject: [Qemu-devel] [PATCH 23/23] target-m68k: Optimize gen_flush_flags X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , gerg@uclinux.org, schwab@linux-m68k.org, agraf@suse.de, Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Richard Henderson Signed-off-by: Richard Henderson Signed-off-by: Laurent Vivier --- target-m68k/translate.c | 56 +++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 52 insertions(+), 4 deletions(-) diff --git a/target-m68k/translate.c b/target-m68k/translate.c index b5e2995..7ab544d 100644 --- a/target-m68k/translate.c +++ b/target-m68k/translate.c @@ -458,18 +458,66 @@ static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base) static void gen_flush_flags(DisasContext *s) { - TCGv tmp; + TCGv t0, t1; switch (s->cc_op) { case CC_OP_FLAGS: return; + + case CC_OP_ADD: + tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); + tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); + /* Compute signed overflow for addition. */ + t0 = tcg_temp_new(); + t1 = tcg_temp_new(); + tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); + tcg_temp_free(t0); + tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V); + tcg_temp_free(t1); + break; + + case CC_OP_SUB: + tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); + tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); + /* Compute signed overflow for subtraction. */ + t0 = tcg_temp_new(); + t1 = tcg_temp_new(); + tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); + tcg_temp_free(t0); + tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1); + tcg_temp_free(t1); + break; + + case CC_OP_CMP: + tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V); + tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V); + /* Compute signed overflow for subtraction. */ + t0 = tcg_temp_new(); + tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N); + tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N); + tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0); + tcg_temp_free(t0); + tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z); + break; + + case CC_OP_LOGIC: + tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); + tcg_gen_movi_i32(QREG_CC_C, 0); + tcg_gen_movi_i32(QREG_CC_V, 0); + break; + case CC_OP_DYNAMIC: gen_helper_flush_flags(cpu_env, QREG_CC_OP); break; + default: - tmp = tcg_const_i32(s->cc_op); - gen_helper_flush_flags(cpu_env, tmp); - tcg_temp_free(tmp); + t0 = tcg_const_i32(s->cc_op); + gen_helper_flush_flags(cpu_env, t0); + tcg_temp_free(t0); break; }