Message ID | 20211022133812.3972903-4-alistair.francis@opensource.wdc.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Fri, 22 Oct 2021 06:38:50 -0700 (PDT) Received: from toolbox.wdc.com (unknown [10.225.165.39]) by usg-ed-osssrv.wdc.com (Postfix) with ESMTPSA id 4HbQRV2W1Mz1RtVl; Fri, 22 Oct 2021 06:38:45 -0700 (PDT) From: Alistair Francis <alistair.francis@opensource.wdc.com> To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Philipp Tomsich <philipp.tomsich@vrull.eu>, Vincent Palatin <vpalatin@rivosinc.com>, Richard Henderson <richard.henderson@linaro.org>, Alistair Francis <alistair.francis@wdc.com> Subject: [PULL 03/33] target/riscv: Fix orc.b implementation Date: Fri, 22 Oct 2021 23:37:42 +1000 Message-Id: <20211022133812.3972903-4-alistair.francis@opensource.wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211022133812.3972903-1-alistair.francis@opensource.wdc.com> References: <20211022133812.3972903-1-alistair.francis@opensource.wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=216.71.154.45; envelope-from=prvs=9222bbd82=alistair.francis@opensource.wdc.com; 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[PULL,01/33] target/riscv: Pass the same value to oprsz and maxsz for vmv.v.v
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diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc index 185c3e9a60..3095624f32 100644 --- a/target/riscv/insn_trans/trans_rvb.c.inc +++ b/target/riscv/insn_trans/trans_rvb.c.inc @@ -249,13 +249,16 @@ static bool trans_rev8_64(DisasContext *ctx, arg_rev8_64 *a) static void gen_orc_b(TCGv ret, TCGv source1) { TCGv tmp = tcg_temp_new(); - TCGv ones = tcg_constant_tl(dup_const_tl(MO_8, 0x01)); + TCGv low7 = tcg_constant_tl(dup_const_tl(MO_8, 0x7f)); - /* Set lsb in each byte if the byte was zero. */ - tcg_gen_sub_tl(tmp, source1, ones); - tcg_gen_andc_tl(tmp, tmp, source1); + /* Set msb in each byte if the byte was non-zero. */ + tcg_gen_and_tl(tmp, source1, low7); + tcg_gen_add_tl(tmp, tmp, low7); + tcg_gen_or_tl(tmp, tmp, source1); + + /* Extract the msb to the lsb in each byte */ + tcg_gen_andc_tl(tmp, tmp, low7); tcg_gen_shri_tl(tmp, tmp, 7); - tcg_gen_andc_tl(tmp, ones, tmp); /* Replicate the lsb of each byte across the byte. */ tcg_gen_muli_tl(ret, tmp, 0xff);