From patchwork Tue Feb 22 14:36:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matheus K. Ferst" X-Patchwork-Id: 12755682 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1509CC433F5 for ; Tue, 22 Feb 2022 16:58:31 +0000 (UTC) Received: from localhost ([::1]:33956 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nMYUg-0006Bu-0h for qemu-devel@archiver.kernel.org; Tue, 22 Feb 2022 11:58:30 -0500 Received: from eggs.gnu.org ([209.51.188.92]:44246) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nMWLX-0007NH-FB; Tue, 22 Feb 2022 09:40:57 -0500 Received: from [187.72.171.209] (port=44457 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nMWLN-0005jA-3k; Tue, 22 Feb 2022 09:40:47 -0500 Received: from p9ibm ([10.10.71.235]) by outlook.eldorado.org.br over TLS secured channel with Microsoft SMTPSVC(8.5.9600.16384); Tue, 22 Feb 2022 11:37:42 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by p9ibm (Postfix) with ESMTP id 58B068000A7; Tue, 22 Feb 2022 11:37:42 -0300 (-03) From: matheus.ferst@eldorado.org.br To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Subject: [PATCH v4 18/47] target/ppc: implement vgnb Date: Tue, 22 Feb 2022 11:36:16 -0300 Message-Id: <20220222143646.1268606-19-matheus.ferst@eldorado.org.br> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220222143646.1268606-1-matheus.ferst@eldorado.org.br> References: <20220222143646.1268606-1-matheus.ferst@eldorado.org.br> MIME-Version: 1.0 X-OriginalArrivalTime: 22 Feb 2022 14:37:42.0743 (UTC) FILETIME=[BFE81E70:01D827F9] X-Host-Lookup-Failed: Reverse DNS lookup failed for 187.72.171.209 (failed) Received-SPF: pass client-ip=187.72.171.209; envelope-from=matheus.ferst@eldorado.org.br; helo=outlook.eldorado.org.br X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, PDS_HP_HELO_NORDNS=0.659, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: danielhb413@gmail.com, richard.henderson@linaro.org, groug@kaod.org, clg@kaod.org, Matheus Ferst , david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Matheus Ferst Suggested-by: Richard Henderson Signed-off-by: Matheus Ferst Reviewed-by: Richard Henderson --- v4: - Optimized implementation (rth) --- target/ppc/insn32.decode | 5 ++ target/ppc/translate/vmx-impl.c.inc | 135 ++++++++++++++++++++++++++++ 2 files changed, 140 insertions(+) diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode index 31a3c3b508..02df4a98e6 100644 --- a/target/ppc/insn32.decode +++ b/target/ppc/insn32.decode @@ -66,6 +66,9 @@ &VX_mp rt mp:bool vrb @VX_mp ...... rt:5 .... mp:1 vrb:5 ........... &VX_mp +&VX_n rt vrb n +@VX_n ...... rt:5 .. n:3 vrb:5 ........... &VX_n + &VX_tb_rc vrt vrb rc:bool @VX_tb_rc ...... vrt:5 ..... vrb:5 rc:1 .......... &VX_tb_rc @@ -418,6 +421,8 @@ VCMPUQ 000100 ... -- ..... ..... 00100000001 @VX_bf ## Vector Bit Manipulation Instruction +VGNB 000100 ..... -- ... ..... 10011001100 @VX_n + VCFUGED 000100 ..... ..... ..... 10101001101 @VX VCLZDM 000100 ..... ..... ..... 11110000100 @VX VCTZDM 000100 ..... ..... ..... 11111000100 @VX diff --git a/target/ppc/translate/vmx-impl.c.inc b/target/ppc/translate/vmx-impl.c.inc index 17fc25d1bd..19219b0010 100644 --- a/target/ppc/translate/vmx-impl.c.inc +++ b/target/ppc/translate/vmx-impl.c.inc @@ -1416,6 +1416,141 @@ GEN_VXFORM_DUAL(vsplth, PPC_ALTIVEC, PPC_NONE, GEN_VXFORM_DUAL(vspltw, PPC_ALTIVEC, PPC_NONE, vextractuw, PPC_NONE, PPC2_ISA300); +static bool trans_VGNB(DisasContext *ctx, arg_VX_n *a) +{ + /* + * Similar to do_vextractm, we'll use a sequence of mask-shift-or operations + * to gather the bits. The masks can be created with + * + * uint64_t mask(uint64_t n, uint64_t step) + * { + * uint64_t p = ((1UL << (1UL << step)) - 1UL) << ((n - 1UL) << step), + * plen = n << step, m = 0; + * for(int i = 0; i < 64/plen; i++) { + * m |= p; + * m = ror64(m, plen); + * } + * p >>= plen * DIV_ROUND_UP(64, plen) - 64; + * return m | p; + * } + * + * But since there are few values of N, we'll use a lookup table to avoid + * these calculations at runtime. + */ + static const uint64_t mask[6][5] = { + { + 0xAAAAAAAAAAAAAAAAULL, 0xccccccccccccccccULL, 0xf0f0f0f0f0f0f0f0ULL, + 0xff00ff00ff00ff00ULL, 0xffff0000ffff0000ULL + }, + { + 0x9249249249249249ULL, 0xC30C30C30C30C30CULL, 0xF00F00F00F00F00FULL, + 0xFF0000FF0000FF00ULL, 0xFFFF00000000FFFFULL + }, + { + /* For N >= 4, some mask operations can be elided */ + 0x8888888888888888ULL, 0, 0xf000f000f000f000ULL, 0, + 0xFFFF000000000000ULL + }, + { + 0x8421084210842108ULL, 0, 0xF0000F0000F0000FULL, 0, 0 + }, + { + 0x8208208208208208ULL, 0, 0xF00000F00000F000ULL, 0, 0 + }, + { + 0x8102040810204081ULL, 0, 0xF000000F000000F0ULL, 0, 0 + } + }; + uint64_t m; + int i, sh, nbits = DIV_ROUND_UP(64, a->n); + TCGv_i64 hi, lo, t0, t1; + + REQUIRE_INSNS_FLAGS2(ctx, ISA310); + REQUIRE_VECTOR(ctx); + + if (a->n < 2) { + /* + * "N can be any value between 2 and 7, inclusive." Otherwise, the + * result is undefined, so we don't need to change RT. Also, N > 7 is + * impossible since the immediate field is 3 bits only. + */ + return true; + } + + hi = tcg_temp_new_i64(); + lo = tcg_temp_new_i64(); + t0 = tcg_temp_new_i64(); + t1 = tcg_temp_new_i64(); + + get_avr64(hi, a->vrb, true); + get_avr64(lo, a->vrb, false); + + /* Align the lower doubleword so we can use the same mask */ + tcg_gen_shli_i64(lo, lo, a->n * nbits - 64); + + /* + * Starting from the most significant bit, gather every Nth bit with a + * sequence of mask-shift-or operation. E.g.: for N=3 + * AxxBxxCxxDxxExxFxxGxxHxxIxxJxxKxxLxxMxxNxxOxxPxxQxxRxxSxxTxxUxxV + * & rep(0b100) + * A..B..C..D..E..F..G..H..I..J..K..L..M..N..O..P..Q..R..S..T..U..V + * << 2 + * .B..C..D..E..F..G..H..I..J..K..L..M..N..O..P..Q..R..S..T..U..V.. + * | + * AB.BC.CD.DE.EF.FG.GH.HI.IJ.JK.KL.LM.MN.NO.OP.PQ.QR.RS.ST.TU.UV.V + * & rep(0b110000) + * AB....CD....EF....GH....IJ....KL....MN....OP....QR....ST....UV.. + * << 4 + * ..CD....EF....GH....IJ....KL....MN....OP....QR....ST....UV...... + * | + * ABCD..CDEF..EFGH..GHIJ..IJKL..KLMN..MNOP..OPQR..QRST..STUV..UV.. + * & rep(0b111100000000) + * ABCD........EFGH........IJKL........MNOP........QRST........UV.. + * << 8 + * ....EFGH........IJKL........MNOP........QRST........UV.......... + * | + * ABCDEFGH....EFGHIJKL....IJKLMNOP....MNOPQRST....QRSTUV......UV.. + * & rep(0b111111110000000000000000) + * ABCDEFGH................IJKLMNOP................QRSTUV.......... + * << 16 + * ........IJKLMNOP................QRSTUV.......................... + * | + * ABCDEFGHIJKLMNOP........IJKLMNOPQRSTUV..........QRSTUV.......... + * & rep(0b111111111111111100000000000000000000000000000000) + * ABCDEFGHIJKLMNOP................................QRSTUV.......... + * << 32 + * ................QRSTUV.......................................... + * | + * ABCDEFGHIJKLMNOPQRSTUV..........................QRSTUV.......... + */ + for (i = 0, sh = a->n - 1; i < 5; i++, sh <<= 1) { + m = mask[a->n - 2][i]; + if (m) { + tcg_gen_andi_i64(hi, hi, m); + tcg_gen_andi_i64(lo, lo, m); + } + if (sh < 64) { + tcg_gen_shli_i64(t0, hi, sh); + tcg_gen_shli_i64(t1, lo, sh); + tcg_gen_or_i64(hi, t0, hi); + tcg_gen_or_i64(lo, t1, lo); + } + } + + tcg_gen_andi_i64(hi, hi, ~(~0ULL >> nbits)); + tcg_gen_andi_i64(lo, lo, ~(~0ULL >> nbits)); + tcg_gen_shri_i64(lo, lo, nbits); + tcg_gen_or_i64(hi, hi, lo); + tcg_gen_trunc_i64_tl(cpu_gpr[a->rt], hi); + + tcg_temp_free_i64(hi); + tcg_temp_free_i64(lo); + tcg_temp_free_i64(t0); + tcg_temp_free_i64(t1); + + return true; +} + static bool do_vextdx(DisasContext *ctx, arg_VA *a, int size, bool right, void (*gen_helper)(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv)) {