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[83.57.175.68]) by smtp.gmail.com with ESMTPSA id t9sm15791314wrw.76.2021.02.14.10.00.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Feb 2021 10:00:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7E2jJiu6LIhE2Ap/QoeyVnqYU2wBaOLlH1WxXmievrY=; b=TvAxD6cvjNPwhfwRH/JvPIU+9lLd2hWTFQgN15UKRMijoPvU6kDh54YYE6KCDdk+B1 L2sk6DZnPVo+9GTbpx/XDhGQ1Lg4aVKAcdjLfUtVPr0PhP48/ek9jwD9pt+y4KjjDR3u l1hlmujK28cCqu3aZzqF6bATDZdzdf0nVulawAr+LfdAbvA4RXWW26fFhgDTo7KpZSiP 7Xc7ymuQxq4WsQkttj+jz8sVY7V9fz4K2dultCI5wpaYi8KKh3c3qZkz60iEuHHaigiR 4O6I2UXqkdwvqh8yC3pDmQeGG4QJx8LiUO6WUw9F5jsb2fZFkaOQFFKVNOAEqJQ8EqBS fEeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=7E2jJiu6LIhE2Ap/QoeyVnqYU2wBaOLlH1WxXmievrY=; b=ViDN3a12HH25deDWW93RJz4EzwXgXdOODcBDbo8bi51N3zfXc3NZ7AyeOQqKwvfW05 ivtHqAzxAClvQpohHLowHvSCH5VIgDxUQ7Rr27dJLVhoNAZevZoSZEj0STA5PgiNSBp+ MkQP7yjTDqouWqGHytpbtEh75Vvth98DoYHNcP8TFb9cD0TvVaWmx6dLC2fEHbH4GBmo ZunBX36OwiqaXFEaDpdPKKOQZKj3ywBhQv0S2ZpIgW7Awr8hcdD06gR695MMwmwPdksM ZG7sBiiyVY7shG5HoWMIPxllhKM02UwE9r+c9cxhf4+DPJkMP453lEltJpClQzIvHzfL 9NKw== X-Gm-Message-State: AOAM530/pFsB4Z4bBl2AFMG+ECPsjVliIJ/YPCwje5XMwEq1ZXTIcfCu b/1MZI3Mpj5wfAk2N6jK7ss= X-Google-Smtp-Source: ABdhPJx9jOV5B0JicBnmBcr658AEI18ZGOIttCkT6W6q+voWKUHLESVRR1MjR9esitoDq52hO0lonA== X-Received: by 2002:a1c:4d03:: with SMTP id o3mr11371598wmh.136.1613325634726; Sun, 14 Feb 2021 10:00:34 -0800 (PST) Sender: =?UTF-8?Q?Philippe_Mathieu=2DDaud=C3=A9?= From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Fredrik Noring , Laurent Vivier , Jiaxun Yang , =?UTF-8?q?Alex=20Benn=C3=A9e?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , "Maciej W. Rozycki" , Thomas Huth , Aurelien Jarno , Richard Henderson , Aleksandar Rikalo Subject: [RFC PATCH 16/42] target/mips/tx79: Introduce PSUB* opcodes (Parallel Subtract) Date: Sun, 14 Feb 2021 18:58:46 +0100 Message-Id: <20210214175912.732946-17-f4bug@amsat.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210214175912.732946-1-f4bug@amsat.org> References: <20210214175912.732946-1-f4bug@amsat.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) Introduce the 'Parallel Subtract' opcodes: - PSUBB (Parallel Subtract Byte) - PSUBH (Parallel Subtract Halfword) - PSUBW (Parallel Subtract Word) Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- target/mips/tx79.decode | 6 ++++ target/mips/tx79_translate.c | 61 ++++++++++++++++++++++++++++++++++++ 2 files changed, 67 insertions(+) diff --git a/target/mips/tx79.decode b/target/mips/tx79.decode index 26c80b9bce5..d1c07c7d901 100644 --- a/target/mips/tx79.decode +++ b/target/mips/tx79.decode @@ -29,6 +29,12 @@ MTHI1 011100 ..... 0000000000 00000 010001 = @rs MFLO1 011100 0000000000 ..... 00000 010010 @rd MTLO1 011100 ..... 0000000000 00000 010011 @rs =20 +# MMI0 + +PSUBW 011100 ..... ..... ..... 00001 001000 @rs_rt_rd +PSUBH 011100 ..... ..... ..... 00101 001000 @rs_rt_rd +PSUBB 011100 ..... ..... ..... 01001 001000 @rs_rt_rd + # MMI2 =20 PCPYLD 011100 ..... ..... ..... 01110 001001 @rs_rt_rd diff --git a/target/mips/tx79_translate.c b/target/mips/tx79_translate.c index 28d07baaa73..23146f6bfac 100644 --- a/target/mips/tx79_translate.c +++ b/target/mips/tx79_translate.c @@ -115,6 +115,67 @@ static bool trans_MTLO1(DisasContext *ctx, arg_rtype *= a) * PSUBUW rd, rs, rt Parallel Subtract with Unsigned saturation Wo= rd */ =20 +static bool trans_parallel_substract(DisasContext *ctx, arg_rtype *a, unsi= gned wlen) +{ + TCGv_i64 ax, bx, t0, t1, t2; + + if (a->rd =3D=3D 0) { + /* nop */ + return true; + } + + ax =3D tcg_temp_new_i64(); + bx =3D tcg_temp_new_i64(); + t0 =3D tcg_temp_new_i64(); + t1 =3D tcg_temp_new_i64(); + t2 =3D tcg_temp_new_i64(); + + /* Lower halve */ + gen_load_gpr(ax, a->rs); + gen_load_gpr(bx, a->rt); + for (int i =3D 0; i < (64 / wlen); i++) { + tcg_gen_sextract_i64(t0, ax, wlen * i, wlen); + tcg_gen_sextract_i64(t1, bx, wlen * i, wlen); + tcg_gen_sub_i64(t2, t0, t1); + tcg_gen_deposit_i64(cpu_gpr[a->rd], cpu_gpr[a->rd], t2, wlen * i, = wlen); + } + /* Upper halve */ + gen_load_gpr_hi(ax, a->rs); + gen_load_gpr_hi(bx, a->rt); + for (int i =3D 0; i < (64 / wlen); i++) { + tcg_gen_sextract_i64(t0, ax, wlen * i, wlen); + tcg_gen_sextract_i64(t1, bx, wlen * i, wlen); + tcg_gen_sub_i64(t2, t0, t1); + tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], cpu_gpr_hi[a->rd], t2, wlen= * i, wlen); + } + + tcg_temp_free(t2); + tcg_temp_free(t1); + tcg_temp_free(t0); + tcg_temp_free(bx); + tcg_temp_free(ax); + + return true; +} + +/* Parallel Subtract Byte */ +static bool trans_PSUBB(DisasContext *ctx, arg_rtype *a) +{ + return trans_parallel_substract(ctx, a, 8); +} + +/* Parallel Subtract Halfword */ +static bool trans_PSUBH(DisasContext *ctx, arg_rtype *a) +{ + return trans_parallel_substract(ctx, a, 16); +} + +/* Parallel Subtract Word */ +static bool trans_PSUBW(DisasContext *ctx, arg_rtype *a) +{ + return trans_parallel_substract(ctx, a, 32); +} + /* * Min/Max (4 instructions) * ------------------------ --=20 2.26.2