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Rozycki" , Thomas Huth , Aurelien Jarno , Richard Henderson , Aleksandar Rikalo Subject: [RFC PATCH 18/42] target/mips/tx79: Introduce PEXTU[BHW] opcodes (Parallel Extend Lower) Date: Sun, 14 Feb 2021 18:58:48 +0100 Message-Id: <20210214175912.732946-19-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 Extend Lower' opcodes: - PEXTLB (Parallel Extend Upper from Byte) - PEXTLH (Parallel Extend Upper from Halfword) - PEXTLW (Parallel Extend Upper from Word) Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- target/mips/tx79.decode | 3 ++ target/mips/tx79_translate.c | 78 ++++++++++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+) diff --git a/target/mips/tx79.decode b/target/mips/tx79.decode index ead5f8281e5..98f21d33e3f 100644 --- a/target/mips/tx79.decode +++ b/target/mips/tx79.decode @@ -34,6 +34,9 @@ MTLO1 011100 ..... 0000000000 00000 010011 @= rs PSUBW 011100 ..... ..... ..... 00001 001000 @rs_rt_rd PSUBH 011100 ..... ..... ..... 00101 001000 @rs_rt_rd PSUBB 011100 ..... ..... ..... 01001 001000 @rs_rt_rd +PEXTLW 011100 ..... ..... ..... 10010 001000 @rs_rt_rd +PEXTLH 011100 ..... ..... ..... 10110 001000 @rs_rt_rd +PEXTLB 011100 ..... ..... ..... 11010 001000 @rs_rt_rd =20 # MMI1 =20 diff --git a/target/mips/tx79_translate.c b/target/mips/tx79_translate.c index 0a2fb28600b..11968d6edab 100644 --- a/target/mips/tx79_translate.c +++ b/target/mips/tx79_translate.c @@ -332,6 +332,84 @@ static bool trans_PNOR(DisasContext *ctx, arg_rtype *a) * PEXTLW rd, rs, rt Parallel Extend Lower from Word */ =20 +static bool trans_PEXTLx(DisasContext *ctx, arg_rtype *a, unsigned wlen) +{ + TCGv_i64 ax, bx; + + if (a->rd =3D=3D 0) { + /* nop */ + return true; + } + + ax =3D tcg_temp_new_i64(); + bx =3D tcg_temp_new_i64(); + + gen_load_gpr(ax, a->rs); + gen_load_gpr(bx, a->rt); + + /* Lower halve */ + for (int i =3D 0; i < 64 / (2 * wlen); i++) { + tcg_gen_deposit_i64(cpu_gpr[a->rd], + cpu_gpr[a->rd], bx, 2 * wlen * i, wlen); + tcg_gen_deposit_i64(cpu_gpr[a->rd], + cpu_gpr[a->rd], ax, 2 * wlen * i + wlen, wlen); + tcg_gen_shri_i64(bx, bx, wlen); + tcg_gen_shri_i64(ax, ax, wlen); + } + /* Upper halve */ + for (int i =3D 0; i < 64 / (2 * wlen); i++) { + tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], + cpu_gpr_hi[a->rd], bx, 2 * wlen * i, wlen); + tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], + cpu_gpr_hi[a->rd], ax, 2 * wlen * i + wlen, wl= en); + tcg_gen_shri_i64(bx, bx, wlen); + tcg_gen_shri_i64(ax, ax, wlen); + } + + tcg_temp_free(bx); + tcg_temp_free(ax); + + return true; +} + +/* Parallel Extend Lower from Byte */ +static bool trans_PEXTLB(DisasContext *ctx, arg_rtype *a) +{ + return trans_PEXTLx(ctx, a, 8); +} + +/* Parallel Extend Lower from Halfword */ +static bool trans_PEXTLH(DisasContext *ctx, arg_rtype *a) +{ + return trans_PEXTLx(ctx, a, 16); +} + +/* Parallel Extend Lower from Word */ +static bool trans_PEXTLW(DisasContext *ctx, arg_rtype *a) +{ + TCGv_i64 ax, bx; + + if (a->rd =3D=3D 0) { + /* nop */ + return true; + } + + ax =3D tcg_temp_new_i64(); + bx =3D tcg_temp_new_i64(); + + gen_load_gpr(ax, a->rs); + gen_load_gpr(bx, a->rt); + + tcg_gen_deposit_i64(cpu_gpr[a->rd], bx, ax, 32, 32); + tcg_gen_shri_i64(bx, bx, 32); + tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], ax, bx, 0, 32); + + tcg_temp_free(bx); + tcg_temp_free(ax); + + return true; +} + /* Parallel Extend Upper from Word */ static bool trans_PEXTUW(DisasContext *ctx, arg_rtype *a) { --=20 2.26.2