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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id z21-20020a1c4c15000000b003f42d2f4531sm5201321wmf.48.2023.05.18.05.51.17 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 May 2023 05:51:17 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 20/29] target/arm: Convert CBZ, CBNZ to decodetree Date: Thu, 18 May 2023 13:50:58 +0100 Message-Id: <20230518125107.146421-21-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230518125107.146421-1-peter.maydell@linaro.org> References: <20230518125107.146421-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::429; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x429.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Convert the compare-and-branch-immediate insns CBZ and CBNZ to decodetree. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Message-id: 20230512144106.3608981-15-peter.maydell@linaro.org --- target/arm/tcg/a64.decode | 5 +++++ target/arm/tcg/translate-a64.c | 26 ++++++-------------------- 2 files changed, 11 insertions(+), 20 deletions(-) diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode index 483e3649929..f5759a66e7f 100644 --- a/target/arm/tcg/a64.decode +++ b/target/arm/tcg/a64.decode @@ -113,3 +113,8 @@ EXTR 0 00 100111 0 0 rm:5 0 imm:5 rn:5 rd:5 &extract sf=0 B 0 00101 .......................... @branch BL 1 00101 .......................... @branch + +%imm19 5:s19 !function=times_4 +&cbz rt imm sf nz + +CBZ sf:1 011010 nz:1 ................... rt:5 &cbz imm=%imm19 diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index f702e9b0678..06619f8a05d 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -1334,33 +1334,22 @@ static bool trans_BL(DisasContext *s, arg_i *a) return true; } -/* Compare and branch (immediate) - * 31 30 25 24 23 5 4 0 - * +----+-------------+----+---------------------+--------+ - * | sf | 0 1 1 0 1 0 | op | imm19 | Rt | - * +----+-------------+----+---------------------+--------+ - */ -static void disas_comp_b_imm(DisasContext *s, uint32_t insn) + +static bool trans_CBZ(DisasContext *s, arg_cbz *a) { - unsigned int sf, op, rt; - int64_t diff; DisasLabel match; TCGv_i64 tcg_cmp; - sf = extract32(insn, 31, 1); - op = extract32(insn, 24, 1); /* 0: CBZ; 1: CBNZ */ - rt = extract32(insn, 0, 5); - diff = sextract32(insn, 5, 19) * 4; - - tcg_cmp = read_cpu_reg(s, rt, sf); + tcg_cmp = read_cpu_reg(s, a->rt, a->sf); reset_btype(s); match = gen_disas_label(s); - tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, + tcg_gen_brcondi_i64(a->nz ? TCG_COND_NE : TCG_COND_EQ, tcg_cmp, 0, match.label); gen_goto_tb(s, 0, 4); set_disas_label(s, match); - gen_goto_tb(s, 1, diff); + gen_goto_tb(s, 1, a->imm); + return true; } /* Test and branch (immediate) @@ -2408,9 +2397,6 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) static void disas_b_exc_sys(DisasContext *s, uint32_t insn) { switch (extract32(insn, 25, 7)) { - case 0x1a: case 0x5a: /* Compare & branch (immediate) */ - disas_comp_b_imm(s, insn); - break; case 0x1b: case 0x5b: /* Test & branch (immediate) */ disas_test_b_imm(s, insn); break; -- 2.34.1