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[174.21.72.5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f44c759ceesm19178305ad.10.2024.05.24.16.21.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 May 2024 16:21:26 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v2 05/67] target/arm: Fix decode of FMOV (hp) vs MOVI Date: Fri, 24 May 2024 16:20:19 -0700 Message-Id: <20240524232121.284515-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240524232121.284515-1-richard.henderson@linaro.org> References: <20240524232121.284515-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::629; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x629.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 autolearn=unavailable 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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org The decode of FMOV (vector, immediate, half-precision) vs invalid cases of MOVI are incorrect. Fixes RISU mismatch for invalid insn 0x2f01fd31. Fixes: 70b4e6a4457 ("arm/translate-a64: add FP16 FMOV to simd_mod_imm") Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/tcg/translate-a64.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index d97acdbaf9..5455ae3685 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -7904,27 +7904,31 @@ static void disas_simd_mod_imm(DisasContext *s, uint32_t insn) bool is_q = extract32(insn, 30, 1); uint64_t imm = 0; - if (o2 != 0 || ((cmode == 0xf) && is_neg && !is_q)) { - /* Check for FMOV (vector, immediate) - half-precision */ - if (!(dc_isar_feature(aa64_fp16, s) && o2 && cmode == 0xf)) { + if (o2) { + if (cmode != 0xf || is_neg) { unallocated_encoding(s); return; } - } - - if (!fp_access_check(s)) { - return; - } - - if (cmode == 15 && o2 && !is_neg) { /* FMOV (vector, immediate) - half-precision */ + if (!dc_isar_feature(aa64_fp16, s)) { + unallocated_encoding(s); + return; + } imm = vfp_expand_imm(MO_16, abcdefgh); /* now duplicate across the lanes */ imm = dup_const(MO_16, imm); } else { + if (cmode == 0xf && is_neg && !is_q) { + unallocated_encoding(s); + return; + } imm = asimd_imm_const(abcdefgh, cmode, is_neg); } + if (!fp_access_check(s)) { + return; + } + if (!((cmode & 0x9) == 0x1 || (cmode & 0xd) == 0x9)) { /* MOVI or MVNI, with MVNI negation handled above. */ tcg_gen_gvec_dup_imm(MO_64, vec_full_reg_offset(s, rd), is_q ? 16 : 8,