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[97.126.123.70]) by smtp.gmail.com with ESMTPSA id g69sm6824842pje.34.2020.03.12.12.42.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Mar 2020 12:42:36 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v6 12/42] target/arm: Implement the SUBP instruction Date: Thu, 12 Mar 2020 12:41:49 -0700 Message-Id: <20200312194219.24406-13-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200312194219.24406-1-richard.henderson@linaro.org> References: <20200312194219.24406-1-richard.henderson@linaro.org> MIME-Version: 1.0 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::444 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- v2: Fix extraction length. --- target/arm/translate-a64.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 9adc259186..49c94bc565 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -5348,19 +5348,39 @@ static void handle_crc32(DisasContext *s, */ static void disas_data_proc_2src(DisasContext *s, uint32_t insn) { - unsigned int sf, rm, opcode, rn, rd; + unsigned int sf, rm, opcode, rn, rd, setflag; sf = extract32(insn, 31, 1); + setflag = extract32(insn, 29, 1); rm = extract32(insn, 16, 5); opcode = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); - if (extract32(insn, 29, 1)) { + if (setflag && opcode != 0) { unallocated_encoding(s); return; } switch (opcode) { + case 0: /* SUBP(S) */ + if (sf == 0 || !dc_isar_feature(aa64_mte_insn_reg, s)) { + goto do_unallocated; + } else { + TCGv_i64 tcg_n, tcg_m, tcg_d; + + tcg_n = read_cpu_reg_sp(s, rn, true); + tcg_m = read_cpu_reg_sp(s, rm, true); + tcg_gen_sextract_i64(tcg_n, tcg_n, 0, 56); + tcg_gen_sextract_i64(tcg_m, tcg_m, 0, 56); + tcg_d = cpu_reg(s, rd); + + if (setflag) { + gen_sub_CC(true, tcg_d, tcg_n, tcg_m); + } else { + tcg_gen_sub_i64(tcg_d, tcg_n, tcg_m); + } + } + break; case 2: /* UDIV */ handle_div(s, false, sf, rm, rn, rd); break; -- 2.20.1