From patchwork Fri Sep 3 17:00:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Tomsich X-Patchwork-Id: 1524451 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=vrull-eu.20150623.gappssmtp.com header.i=@vrull-eu.20150623.gappssmtp.com header.a=rsa-sha256 header.s=20150623 header.b=Hm0BaW6Q; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 ozlabs.org (Postfix) with ESMTPS id 4H1PJJ5z4Rz9sW4 for ; Sat, 4 Sep 2021 03:03:28 +1000 (AEST) Received: from localhost ([::1]:37150 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mMCb8-00011P-IO for incoming@patchwork.ozlabs.org; Fri, 03 Sep 2021 13:03:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43338) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMCZ2-0007QN-AI for qemu-devel@nongnu.org; Fri, 03 Sep 2021 13:01:16 -0400 Received: from mail-lf1-x134.google.com ([2a00:1450:4864:20::134]:41655) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mMCZ0-00055E-4h for qemu-devel@nongnu.org; Fri, 03 Sep 2021 13:01:16 -0400 Received: by mail-lf1-x134.google.com with SMTP id y34so12970281lfa.8 for ; Fri, 03 Sep 2021 10:01:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vrull-eu.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dFXolZKt0nDbC1saRJW1HJvG5PiI8fg5A/41EL/oZeQ=; b=Hm0BaW6QP0/gnWQ+CXwHys9lTDYvfxr7HgOd9398QVjXSO+OV+IBOtzc8wICxNOfxc 6YFWysmbghnvp5rxAax5f+/Vm4gCSBSrTeFoNvPU86DXr/r0FfVVjVlQUfZ8YBBoYGjw vv2mqBLzEeDKlG2MhcMVfL8cAsy18btkPwmd4xu596QsJwIT8ynNipJh0QuQ5qTCgb7d NwhwrCt6HpILUgvwaxWK2vWlcUnHA6+DCpYwbjNXpCwc5G8aLxyJpRbK/EU9H7r3leCc OQgBptXJgVmVDnpP+VbpJZ2Lu5RPomRrTj4/O0J7Jy7K/BMEjpT0TBRCKbF6Ht5KaA8E gjUQ== 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=dFXolZKt0nDbC1saRJW1HJvG5PiI8fg5A/41EL/oZeQ=; b=rtzTel49gBiKB3gOijgkPYcVSTOUohb4lpzdYuydjM3UdpesmJ76nBeuh6nsMFKaIU GWRoWQusjDNw8oRvUQfZL0YmOjCmaoyE1Z98enuAepLbfCJ6q5scdfXLqiPcoDJIYXrH zrqy3+nHocBuaq1bNWpLfdMUsHVhiAe96ngCvw1k+lMfqymYvI7JUkYAA6Vy81WfGu7T DJBUH5wltDLKiPLfoAeQwsZXKWAytfvj4DDy4hJfgCDipESzvgh0+dMttE36Pp+ynjUm Ovv6sAm99qEgxz/2ZCRt42ZFdQcagw3ZaPw4RQANwpIF0MAoiEPHZBg9LOONeqBbufh/ uNvw== X-Gm-Message-State: AOAM531pxqeA5jGEKc0KLMDdhICVyeTEXm+lCgWnpFo86e9S3rlq/qSA rIubxwy19TTeZkiLr/AibA43fAComQeOLl4pBV4= X-Google-Smtp-Source: ABdhPJzSZicyqI0cZ3ykyrH1SzGiEfIq2PjMW8QeNvFYjdsyMTKNtuz1p+nzTE1rtYeiLWUqI3tdYQ== X-Received: by 2002:a05:6512:241:: with SMTP id b1mr3468676lfo.99.1630688472256; Fri, 03 Sep 2021 10:01:12 -0700 (PDT) Received: from localhost.localdomain ([2a01:4f9:3a:1e26::2]) by smtp.gmail.com with ESMTPSA id c3sm628401ljj.77.2021.09.03.10.01.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Sep 2021 10:01:11 -0700 (PDT) From: Philipp Tomsich To: qemu-devel@nongnu.org Subject: [PATCH v9 09/14] target/riscv: Add orc.b instruction for Zbb, removing gorc/gorci Date: Fri, 3 Sep 2021 19:00:55 +0200 Message-Id: <20210903170100.2529121-10-philipp.tomsich@vrull.eu> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210903170100.2529121-1-philipp.tomsich@vrull.eu> References: <20210903170100.2529121-1-philipp.tomsich@vrull.eu> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::134; envelope-from=philipp.tomsich@vrull.eu; helo=mail-lf1-x134.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: Richard Henderson , Kito Cheng , Alistair Francis , Philipp Tomsich Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The 1.0.0 version of Zbb does not contain gorc/gorci. Instead, a orc.b instruction (equivalent to the orc.b pseudo-instruction built on gorci from pre-0.93 draft-B) is available, mainly targeting string-processing workloads. This commit adds the new orc.b instruction and removed gorc/gorci. Signed-off-by: Philipp Tomsich Reviewed-by: Richard Henderson Reviewed-by: Alistair Francis --- Changes in v9: - Picked up Alistair's Reviewed-by, after patman had failed to catch it for v8. Changes in v8: - Optimize orc.b further by reordering the shift/and, updating the comment to reflect that we put the truth-value into the LSB, and putting the (now only) constant in a temporary - Fold the final bitwise-not into the second and, using and andc. Changes in v7: - Free TCG temporary in gen_orc_b(). Changes in v6: - Fixed orc.b (now passes SPEC w/ optimized string functions) by adding the missing final negation. Changes in v4: - Change orc.b to implementation suggested by Richard Henderson Changes in v3: - Moved orc.b and gorc/gorci changes into separate commit. - Using the simpler orc.b implementation suggested by Richard Henderson target/riscv/bitmanip_helper.c | 26 ----------------- target/riscv/helper.h | 2 -- target/riscv/insn32.decode | 6 +--- target/riscv/insn_trans/trans_rvb.c.inc | 39 +++++++++++-------------- 4 files changed, 18 insertions(+), 55 deletions(-) diff --git a/target/riscv/bitmanip_helper.c b/target/riscv/bitmanip_helper.c index 73be5a81c7..bb48388fcd 100644 --- a/target/riscv/bitmanip_helper.c +++ b/target/riscv/bitmanip_helper.c @@ -64,32 +64,6 @@ target_ulong HELPER(grevw)(target_ulong rs1, target_ulong rs2) return do_grev(rs1, rs2, 32); } -static target_ulong do_gorc(target_ulong rs1, - target_ulong rs2, - int bits) -{ - target_ulong x = rs1; - int i, shift; - - for (i = 0, shift = 1; shift < bits; i++, shift <<= 1) { - if (rs2 & shift) { - x |= do_swap(x, adjacent_masks[i], shift); - } - } - - return x; -} - -target_ulong HELPER(gorc)(target_ulong rs1, target_ulong rs2) -{ - return do_gorc(rs1, rs2, TARGET_LONG_BITS); -} - -target_ulong HELPER(gorcw)(target_ulong rs1, target_ulong rs2) -{ - return do_gorc(rs1, rs2, 32); -} - target_ulong HELPER(clmul)(target_ulong rs1, target_ulong rs2) { target_ulong result = 0; diff --git a/target/riscv/helper.h b/target/riscv/helper.h index 8a318a2dbc..a9bda2c8ac 100644 --- a/target/riscv/helper.h +++ b/target/riscv/helper.h @@ -61,8 +61,6 @@ DEF_HELPER_FLAGS_1(fclass_d, TCG_CALL_NO_RWG_SE, tl, i64) /* Bitmanip */ DEF_HELPER_FLAGS_2(grev, TCG_CALL_NO_RWG_SE, tl, tl, tl) DEF_HELPER_FLAGS_2(grevw, TCG_CALL_NO_RWG_SE, tl, tl, tl) -DEF_HELPER_FLAGS_2(gorc, TCG_CALL_NO_RWG_SE, tl, tl, tl) -DEF_HELPER_FLAGS_2(gorcw, TCG_CALL_NO_RWG_SE, tl, tl, tl) DEF_HELPER_FLAGS_2(clmul, TCG_CALL_NO_RWG_SE, tl, tl, tl) DEF_HELPER_FLAGS_2(clmulr, TCG_CALL_NO_RWG_SE, tl, tl, tl) diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index a509cfee11..59202196dc 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -681,6 +681,7 @@ max 0000101 .......... 110 ..... 0110011 @r maxu 0000101 .......... 111 ..... 0110011 @r min 0000101 .......... 100 ..... 0110011 @r minu 0000101 .......... 101 ..... 0110011 @r +orc_b 001010 000111 ..... 101 ..... 0010011 @r2 orn 0100000 .......... 110 ..... 0110011 @r rol 0110000 .......... 001 ..... 0110011 @r ror 0110000 .......... 101 ..... 0110011 @r @@ -702,19 +703,14 @@ pack 0000100 .......... 100 ..... 0110011 @r packu 0100100 .......... 100 ..... 0110011 @r packh 0000100 .......... 111 ..... 0110011 @r grev 0110100 .......... 101 ..... 0110011 @r -gorc 0010100 .......... 101 ..... 0110011 @r - grevi 01101. ........... 101 ..... 0010011 @sh -gorci 00101. ........... 101 ..... 0010011 @sh # *** RV64B Standard Extension (in addition to RV32B) *** packw 0000100 .......... 100 ..... 0111011 @r packuw 0100100 .......... 100 ..... 0111011 @r grevw 0110100 .......... 101 ..... 0111011 @r -gorcw 0010100 .......... 101 ..... 0111011 @r greviw 0110100 .......... 101 ..... 0011011 @sh5 -gorciw 0010100 .......... 101 ..... 0011011 @sh5 # *** RV32 Zbc Standard Extension *** clmul 0000101 .......... 001 ..... 0110011 @r diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc index 02f2913063..311174ea40 100644 --- a/target/riscv/insn_trans/trans_rvb.c.inc +++ b/target/riscv/insn_trans/trans_rvb.c.inc @@ -295,16 +295,27 @@ static bool trans_grevi(DisasContext *ctx, arg_grevi *a) return gen_shift_imm_fn(ctx, a, EXT_NONE, gen_grevi); } -static bool trans_gorc(DisasContext *ctx, arg_gorc *a) +static void gen_orc_b(TCGv ret, TCGv source1) { - REQUIRE_EXT(ctx, RVB); - return gen_shift(ctx, a, EXT_ZERO, gen_helper_gorc); + TCGv tmp = tcg_temp_new(); + TCGv ones = tcg_constant_tl(dup_const(MO_8, 0x01)); + + /* Set lsb in each byte if the byte was zero. */ + tcg_gen_sub_tl(tmp, source1, ones); + tcg_gen_andc_tl(tmp, tmp, source1); + 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); + + tcg_temp_free(tmp); } -static bool trans_gorci(DisasContext *ctx, arg_gorci *a) +static bool trans_orc_b(DisasContext *ctx, arg_orc_b *a) { - REQUIRE_EXT(ctx, RVB); - return gen_shift_imm_tl(ctx, a, EXT_ZERO, gen_helper_gorc); + REQUIRE_ZBB(ctx); + return gen_unary(ctx, a, EXT_ZERO, gen_orc_b); } #define GEN_SHADD(SHAMT) \ @@ -474,22 +485,6 @@ static bool trans_greviw(DisasContext *ctx, arg_greviw *a) return gen_shift_imm_tl(ctx, a, EXT_ZERO, gen_helper_grev); } -static bool trans_gorcw(DisasContext *ctx, arg_gorcw *a) -{ - REQUIRE_64BIT(ctx); - REQUIRE_EXT(ctx, RVB); - ctx->w = true; - return gen_shift(ctx, a, EXT_ZERO, gen_helper_gorc); -} - -static bool trans_gorciw(DisasContext *ctx, arg_gorciw *a) -{ - REQUIRE_64BIT(ctx); - REQUIRE_EXT(ctx, RVB); - ctx->w = true; - return gen_shift_imm_tl(ctx, a, EXT_ZERO, gen_helper_gorc); -} - #define GEN_SHADD_UW(SHAMT) \ static void gen_sh##SHAMT##add_uw(TCGv ret, TCGv arg1, TCGv arg2) \ { \