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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id z9sm2242317wma.4.2020.09.01.08.18.52 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Sep 2020 08:18:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=h02J47J0NAEkCFyJiV01L5/BuhEXjgNdEYvUqqwW3do=; b=vfPI1miL3skFzDV1zpH58LcXJbHVT67nTG+da9mp8QiDOn4+aiBbNGkEJROkfePBt4 grM8yi3QaWYC1AYbHxMfzlkp3/vue0E9dI1UbnMrFem/jFmQYXXqP0QwTIN3FaynDc6h 5b1dHPpJrI/X2gju1pEwpIhxtsr9/9COZ45H73cmR35Fqjdi9Az8Qq+gUJvH6EH8D0BT zU54MQ3rlsjGMaT2xBBzxYTMdySRRG2jt0IyQN5iDiBcxiOXj4IxTytvEagnsrBiXNhS ppip/0G06RyS3AXQoEXvD0uc5ZgIHisaVj4AThzltilVZihEvdAmb1vUo8V/JsQVIDcl Vymg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=h02J47J0NAEkCFyJiV01L5/BuhEXjgNdEYvUqqwW3do=; b=nVqXGhq24RqXYkbs9Dw25hRyRccHsRkRQZ8OQOujVOBbYQrHzq3gZ5BPwQsd7Xft+I QcETPe6t776F2mKMxwevNrHmDh5FiKXZjWIgVayTjNqwOYOjdK7WPETddprvcToroRdc ioJNEK0mSL2o+L96+HhDsjpnxds3lxQenUnBW4W1bVN5iVBTLgA78jZlL6KlUn94Hg20 yd7jbrBRpnISMO3JN3UDW817uU71khvhwu8ylZFBzLsGMhaedT6aSP97nv3kUetRntFX SU5pdq8cq9IAEwmzw9RIr4wBtd8nAS9ZPVtZ08RtJaZTaEZ3EWYM/ErCxqDNPkG2/Lyt 7Hkw== X-Gm-Message-State: AOAM531y1o7yThqO9sQ7+QEwaKOFzP0VMl7qAJVCwCSj78HDJdRb15zY zTDKfS9wnVT+ySVDM/4IYhdzd1cSRWSz8Cna X-Google-Smtp-Source: ABdhPJzSg3clF5LFP0axHNjnwBZ/CW5X7HdkuW9EB7PJK6d47BZkCckfktFhj6V3f7L3IztWNEAWKQ== X-Received: by 2002:a5d:4710:: with SMTP id y16mr2496710wrq.203.1598973533221; Tue, 01 Sep 2020 08:18:53 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 21/47] target/arm: Implement VFP fp16 VMOV between gp and halfprec registers Date: Tue, 1 Sep 2020 16:17:57 +0100 Message-Id: <20200901151823.29785-22-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200901151823.29785-1-peter.maydell@linaro.org> References: <20200901151823.29785-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::42e; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42e.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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=ham autolearn_force=no X-Spam_action: no action 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Implement the VFP fp16 variant of VMOV that transfers a 16-bit value between a general purpose register and a VFP register. Note that Rt =3D=3D 15 is UNPREDICTABLE; since this insn is v8 and later only we have no need to replicate the old "updates CPSR.NZCV" behaviour that the singleprec version of this insn does. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Message-id: 20200828183354.27913-22-peter.maydell@linaro.org --- target/arm/vfp.decode | 1 + target/arm/translate-vfp.c.inc | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/target/arm/vfp.decode b/target/arm/vfp.decode index 9a79e99f1b0..51f143b4a51 100644 --- a/target/arm/vfp.decode +++ b/target/arm/vfp.decode @@ -74,6 +74,7 @@ VDUP ---- 1110 1 b:1 q:1 0 .... rt:4 1011 . 0 e:1= 1 0000 \ vn=3D%vn_dp =20 VMSR_VMRS ---- 1110 111 l:1 reg:4 rt:4 1010 0001 0000 +VMOV_half ---- 1110 000 l:1 .... rt:4 1001 . 001 0000 vn=3D%vn_sp VMOV_single ---- 1110 000 l:1 .... rt:4 1010 . 001 0000 vn=3D%vn_sp =20 VMOV_64_sp ---- 1100 010 op:1 rt2:4 rt:4 1010 00.1 .... vm=3D%vm_sp diff --git a/target/arm/translate-vfp.c.inc b/target/arm/translate-vfp.c.inc index 4b26156eccc..28e0dba5f14 100644 --- a/target/arm/translate-vfp.c.inc +++ b/target/arm/translate-vfp.c.inc @@ -809,6 +809,40 @@ static bool trans_VMSR_VMRS(DisasContext *s, arg_VMSR_= VMRS *a) return true; } =20 +static bool trans_VMOV_half(DisasContext *s, arg_VMOV_single *a) +{ + TCGv_i32 tmp; + + if (!dc_isar_feature(aa32_fp16_arith, s)) { + return false; + } + + if (a->rt =3D=3D 15) { + /* UNPREDICTABLE; we choose to UNDEF */ + return false; + } + + if (!vfp_access_check(s)) { + return true; + } + + if (a->l) { + /* VFP to general purpose register */ + tmp =3D tcg_temp_new_i32(); + neon_load_reg32(tmp, a->vn); + tcg_gen_andi_i32(tmp, tmp, 0xffff); + store_reg(s, a->rt, tmp); + } else { + /* general purpose register to VFP */ + tmp =3D load_reg(s, a->rt); + tcg_gen_andi_i32(tmp, tmp, 0xffff); + neon_store_reg32(tmp, a->vn); + tcg_temp_free_i32(tmp); + } + + return true; +} + static bool trans_VMOV_single(DisasContext *s, arg_VMOV_single *a) { TCGv_i32 tmp; --=20 2.20.1