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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id e17sm10785945wrt.95.2019.06.11.03.54.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 11 Jun 2019 03:54:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=n3MASxtEnCokj3COittArwSNYGq/3JuuvGmF9r8yZL4=; b=MCaF04hcvXMGxWhChHTbxUZ9Wo/z5+TCTzJFIiD2+xbdVG3SZNf5v6Xyqlgwxx4y6E hMF4sfVKW9vXb8LlNkNgz1evoj9o4SzS93+IhNVI2CqOA15G1HrqRghNl0QJQ+CJOcB6 +IpyQupcx2r0uHzw4m9QK2wANVpR3WgeMNWYQONfqDhuAWgUhxgpP+weAP+tTqCtTF1L Nxy5ypQVbrRAa4q8meD5Tm/yR9iAVhkJnGAV+FTYPTevRRHFiUBcZQXQF61Oz3nAYvZN zbsJPi18ScPR3qhdyXmqKx+BWGdPgw4NoQSP4fuRWGExi3R2NXhqQdovkxpIugFrybA0 Q/EA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=n3MASxtEnCokj3COittArwSNYGq/3JuuvGmF9r8yZL4=; b=Qy+Q3DtssXg/ZKI+Sq+rPqXVqZFVUpNqjHN7h80J68E7OcVql8tBw2WsJn6cmoCNnI qowMgWPt18OmxekRH6+rTdKFniNNGBa+ylZtc9m/P5Q+hKr8uGziawIOfLwTUa8v80t8 i/n0YbdIAFMBb2wwmsAqAjSPEYPHSj0HQdUuSI4XWEbBsV/kcsIUhpINJd8OcCx4PVpv MtegJ8TK0PdChqTkWMpj8syZXsWAnAhkrjOT2LFad72MTkvgUJivxLgG3D9I4baBdURB Be+Z343AVfpp8bYZWXpiDYU+Vy2LKpMxACMIfF2fTfb4pcbYux/eQmogyuEehB9tJ3dU 3y2A== X-Gm-Message-State: APjAAAVG57lulVmUi3gMyU3x2yomJGqe7tOSOTAZ4KqSvUO99/fkE147 WfmGnSoxQ2UXPpHoZJiYAyOgSg== X-Google-Smtp-Source: APXvYqzyD5DaZT7DLUYbFuFgOj0h+DMA3lSqm/5G8SPAzhJstyadpj0tlv2mC81H7QpsQe8uvmy3kA== X-Received: by 2002:a05:600c:2383:: with SMTP id m3mr15719919wma.20.1560250455854; Tue, 11 Jun 2019 03:54:15 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Date: Tue, 11 Jun 2019 11:53:29 +0100 Message-Id: <20190611105351.9871-21-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190611105351.9871-1-peter.maydell@linaro.org> References: <20190611105351.9871-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::342 Subject: [Qemu-devel] [PATCH v2 20/42] target/arm: Convert VFP VNMLS to decodetree 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: Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Convert the VFP VNMLS instruction to decodetree. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- target/arm/translate-vfp.inc.c | 42 ++++++++++++++++++++++++++++++++++ target/arm/translate.c | 24 +------------------ target/arm/vfp.decode | 5 ++++ 3 files changed, 48 insertions(+), 23 deletions(-) diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c index 00f64401dda..1d7100debe4 100644 --- a/target/arm/translate-vfp.inc.c +++ b/target/arm/translate-vfp.inc.c @@ -1341,3 +1341,45 @@ static bool trans_VMLS_dp(DisasContext *s, arg_VMLS_= sp *a) { return do_vfp_3op_dp(s, gen_VMLS_dp, a->vd, a->vn, a->vm, true); } + +static void gen_VNMLS_sp(TCGv_i32 vd, TCGv_i32 vn, TCGv_i32 vm, TCGv_ptr f= pst) +{ + /* + * VNMLS: -fd + (fn * fm) + * Note that it isn't valid to replace (-A + B) with (B - A) or similar + * plausible looking simplifications because this will give wrong resu= lts + * for NaNs. + */ + TCGv_i32 tmp =3D tcg_temp_new_i32(); + + gen_helper_vfp_muls(tmp, vn, vm, fpst); + gen_helper_vfp_negs(vd, vd); + gen_helper_vfp_adds(vd, vd, tmp, fpst); + tcg_temp_free_i32(tmp); +} + +static bool trans_VNMLS_sp(DisasContext *s, arg_VNMLS_sp *a) +{ + return do_vfp_3op_sp(s, gen_VNMLS_sp, a->vd, a->vn, a->vm, true); +} + +static void gen_VNMLS_dp(TCGv_i64 vd, TCGv_i64 vn, TCGv_i64 vm, TCGv_ptr f= pst) +{ + /* + * VNMLS: -fd + (fn * fm) + * Note that it isn't valid to replace (-A + B) with (B - A) or similar + * plausible looking simplifications because this will give wrong resu= lts + * for NaNs. + */ + TCGv_i64 tmp =3D tcg_temp_new_i64(); + + gen_helper_vfp_muld(tmp, vn, vm, fpst); + gen_helper_vfp_negd(vd, vd); + gen_helper_vfp_addd(vd, vd, tmp, fpst); + tcg_temp_free_i64(tmp); +} + +static bool trans_VNMLS_dp(DisasContext *s, arg_VNMLS_sp *a) +{ + return do_vfp_3op_dp(s, gen_VNMLS_dp, a->vd, a->vn, a->vm, true); +} diff --git a/target/arm/translate.c b/target/arm/translate.c index bddc0d20447..b3d0648bb50 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -1393,18 +1393,6 @@ VFP_OP2(div) =20 #undef VFP_OP2 =20 -static inline void gen_vfp_F1_mul(int dp) -{ - /* Like gen_vfp_mul() but put result in F1 */ - TCGv_ptr fpst =3D get_fpstatus_ptr(0); - if (dp) { - gen_helper_vfp_muld(cpu_F1d, cpu_F0d, cpu_F1d, fpst); - } else { - gen_helper_vfp_muls(cpu_F1s, cpu_F0s, cpu_F1s, fpst); - } - tcg_temp_free_ptr(fpst); -} - static inline void gen_vfp_F1_neg(int dp) { /* Like gen_vfp_neg() but put result in F1 */ @@ -3134,7 +3122,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t i= nsn) rn =3D VFP_SREG_N(insn); =20 switch (op) { - case 0 ... 1: + case 0 ... 2: /* Already handled by decodetree */ return 1; default: @@ -3320,16 +3308,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t = insn) for (;;) { /* Perform the calculation. */ switch (op) { - case 2: /* VNMLS: -fd + (fn * fm) */ - /* Note that it isn't valid to replace (-A + B) with (= B - A) - * or similar plausible looking simplifications - * because this will give wrong results for NaNs. - */ - gen_vfp_F1_mul(dp); - gen_mov_F0_vreg(dp, rd); - gen_vfp_neg(dp); - gen_vfp_add(dp); - break; case 3: /* VNMLA: -fd + -(fn * fm) */ gen_vfp_mul(dp); gen_vfp_F1_neg(dp); diff --git a/target/arm/vfp.decode b/target/arm/vfp.decode index 7bcf2260eec..08e4f427408 100644 --- a/target/arm/vfp.decode +++ b/target/arm/vfp.decode @@ -107,3 +107,8 @@ VMLS_sp ---- 1110 0.00 .... .... 1010 .1.0 .... \ vm=3D%vm_sp vn=3D%vn_sp vd=3D%vd_sp VMLS_dp ---- 1110 0.00 .... .... 1011 .1.0 .... \ vm=3D%vm_dp vn=3D%vn_dp vd=3D%vd_dp + +VNMLS_sp ---- 1110 0.01 .... .... 1010 .0.0 .... \ + vm=3D%vm_sp vn=3D%vn_sp vd=3D%vd_sp +VNMLS_dp ---- 1110 0.01 .... .... 1011 .0.0 .... \ + vm=3D%vm_dp vn=3D%vn_dp vd=3D%vd_dp --=20 2.20.1