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[174.21.149.226]) by smtp.gmail.com with ESMTPSA id m189sm13928532pfm.60.2020.04.18.08.56.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Apr 2020 08:56:56 -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=7uX8ThqikoEq018tD9k93q1ZZz6mGC+ypRxdEu5/0Vw=; b=LHcXxhgYH8NUJ32OqE1+8L5xl0iipBPoiI1xa0YRy0pH1jm6NAkOc7oaVccIVeOy3g T/F7+wIYib6zNYSm5gebCftgMbwR0CO+WqT5y6Ihe94VFe4KW7T2TSxyvvvRpSBMBJvi 1Bi031xX1jFptSs2i/zmLZzqEWe1pftpO1AgrHDdtbIg4A8b2go7f8JA/utmrKFpKOV0 BPSL4kLzLxG2JYuwLxpt5Wdoxa6Fp6/38c898k58rVcE1QOy55+v5l9WFVFUnEm5fuD8 cBfwjdV9xId0Zq2olmCJwVyb/Cq8CcJEiPr9Uecr+3UApJQMR2L0WrWhEIrYs75MdjNH zxsg== 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=7uX8ThqikoEq018tD9k93q1ZZz6mGC+ypRxdEu5/0Vw=; b=qXf92rVBILiMmldNmEy/gzISoFbfXF+5tX32cRjmqqtbndVCubfx5gQrC5s0oPMap3 gqYv1Z4upDLBtV7+6TVj0H9jCKZQ5W+23UkhqWf7ye4LMY7ET9MEvGI3o9IsfZ5ois3p is38ouSA/EKqiuMPNnwcagYczn5yE90o3SHYitllo6osRPUhNsAamqJp5H20cyx1v2gd F//Z9A1YoYtWmpOmquWjFwsO7aIf1PgXunvK8Jks11cvo/LclluKHaf9/MRBPGi+AHLp nU0RLmrJWXKuAIT59bOrV7Fxr0SxqOdX9ecAw0iSaScJ7AfiMpwn0yyEq/f2MpqYCvBG D86g== X-Gm-Message-State: AGi0PuYan1BHP1+AvPupjqVsNk2aCuH69pKPSrsIB65zPklzlUs+9CdN OlYueQu+O0saGC4UOjnBRAIOwsLnmdw= X-Google-Smtp-Source: APiQypInsW1j8bdviOTcpHgkM9TbZW04QcFv9JYn8hnkpQGzfK5Qecb4gC5kqT6eMOzlPVUatZRLpQ== X-Received: by 2002:a17:90a:fb4e:: with SMTP id iq14mr11022943pjb.146.1587225416810; Sat, 18 Apr 2020 08:56:56 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 2/3] target/arm: Use tcg_gen_gvec_mov for clear_vec_high Date: Sat, 18 Apr 2020 08:56:50 -0700 Message-Id: <20200418155651.3901-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200418155651.3901-1-richard.henderson@linaro.org> References: <20200418155651.3901-1-richard.henderson@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: 2607:f8b0:4864:20::642 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 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" The 8-byte store for the end a !is_q operation can be merged with the other stores. Use a no-op vector move to trigger the expand_clr portion of tcg_gen_gvec_mov. Signed-off-by: Richard Henderson Reviewed-by: Alex Benn=C3=A9e --- target/arm/translate-a64.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 095638e09a..d57aa54d6a 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -513,14 +513,8 @@ static void clear_vec_high(DisasContext *s, bool is_q,= int rd) unsigned ofs =3D fp_reg_offset(s, rd, MO_64); unsigned vsz =3D vec_full_reg_size(s); =20 - if (!is_q) { - TCGv_i64 tcg_zero =3D tcg_const_i64(0); - tcg_gen_st_i64(tcg_zero, cpu_env, ofs + 8); - tcg_temp_free_i64(tcg_zero); - } - if (vsz > 16) { - tcg_gen_gvec_dup_imm(MO_64, ofs + 16, vsz - 16, vsz - 16, 0); - } + /* Nop move, with side effect of clearing the tail. */ + tcg_gen_gvec_mov(MO_64, ofs, ofs, is_q ? 16 : 8, vsz); } =20 void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v) --=20 2.20.1