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[97.113.13.231]) by smtp.gmail.com with ESMTPSA id b67sm20029147pfb.150.2019.05.13.18.11.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 18:11:34 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Mon, 13 May 2019 18:11:29 -0700 Message-Id: <20190514011129.11330-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190514011129.11330-1-richard.henderson@linaro.org> References: <20190514011129.11330-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::641 Subject: [Qemu-devel] [PATCH 2/2] target/arm: Simplify BFXIL expansion 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: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The mask implied by the extract is redundant with the one implied by the deposit. Also, fix spelling of BFXIL. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- target/arm/translate-a64.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index c4bee74ce5..472d898096 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -4043,8 +4043,8 @@ static void disas_bitfield(DisasContext *s, uint32_t insn) tcg_gen_extract_i64(tcg_rd, tcg_tmp, ri, len); return; } - /* opc == 1, BXFIL fall through to deposit */ - tcg_gen_extract_i64(tcg_tmp, tcg_tmp, ri, len); + /* opc == 1, BFXIL fall through to deposit */ + tcg_gen_shri_i64(tcg_tmp, tcg_tmp, ri); pos = 0; } else { /* Handle the ri > si case with a deposit @@ -4062,7 +4062,7 @@ static void disas_bitfield(DisasContext *s, uint32_t insn) len = ri; } - if (opc == 1) { /* BFM, BXFIL */ + if (opc == 1) { /* BFM, BFXIL */ tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, pos, len); } else { /* SBFM or UBFM: We start with zero, and we haven't modified -- 2.17.1