From patchwork Wed Feb 13 15:54:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Palmer Dabbelt X-Patchwork-Id: 10810305 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F084E922 for ; Wed, 13 Feb 2019 16:14:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DBA4C2DD3C for ; Wed, 13 Feb 2019 16:14:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D9B7F2DECB; Wed, 13 Feb 2019 16:14:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DCD072DF1C for ; Wed, 13 Feb 2019 16:14:50 +0000 (UTC) Received: from localhost ([127.0.0.1]:59351 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gtxBR-0007Kf-KG for patchwork-qemu-devel@patchwork.kernel.org; Wed, 13 Feb 2019 11:14:49 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59666) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gtwtM-0001vn-4c for qemu-devel@nongnu.org; Wed, 13 Feb 2019 10:56:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gtwtJ-0002q0-BM for qemu-devel@nongnu.org; Wed, 13 Feb 2019 10:56:08 -0500 Received: from mail-pg1-x544.google.com ([2607:f8b0:4864:20::544]:45357) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gtwtF-0001fF-EZ for qemu-devel@nongnu.org; Wed, 13 Feb 2019 10:56:03 -0500 Received: by mail-pg1-x544.google.com with SMTP id y4so1295495pgc.12 for ; Wed, 13 Feb 2019 07:55:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=subject:date:message-id:in-reply-to:references:cc:from:to; bh=2XxSO7T+o4857KBhW3RvMXKOazL6Pz86Bxq2SPK8lbs=; b=PZgA2/gGtltWU1MfUXIQuIRXk6GbMFOfSY0jpF5TM/TVorKyVtiltYNUqQB2kEjoAn ciXIanMkHI6xhq+aaIQ7jNT6IdW2YsAzX+goLelDHIpb07Je4pfeGVXqh8e487E9giiz w35dSOPijaeASMa5PUlIdXSVjT7oxn5uSEmSTGec4O5bGmD42VojVIfjDYHsh9JEp+6N lGsSopwv9zVQM4cHjLm9+cTZfI8tmlH3yAeHJxbhzaQoJpHKvGQm/DoA1fwHH6FWhDLX mmwvCPjfZXMOd9dKoxk6lAwWHd7PvqGfmUaYxUXqG70xgALJjQAk08gZEPxuVtuSv/Kt avEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:date:message-id:in-reply-to:references :cc:from:to; bh=2XxSO7T+o4857KBhW3RvMXKOazL6Pz86Bxq2SPK8lbs=; b=RLQvZ0rDPIolmDMrDkaorROR+ADGXY2T3UYpegZKnkJ2tyhSYEF3bWgkrpsCRDTJ9+ cb7kuH9Uk4+Tpiv2EKOyPgfz75TjB71y+LpSKIMXYZVtIdL3bvPVi95OvfNUBuRFWD6c urhA1ECy6WBe4CxH8o9+9wGzIeShKg+fA2+b9PJmiQ+GQV4SFwmgyZhawIyZTjsKRshG DsgM6qFUwPbaf7rAPSNpZrccD5x+DdM0Lhap5wf/PCbQJ4X5dvvdPJ6hhUFVPMG1YLAp XydPuQ41Dy18DTsJaGXfaH1MSAKqSGB4f601KoBX8kdTD8nOOL0FcBgD5DPsBCrnbk7X ErdQ== X-Gm-Message-State: AHQUAuahoUKePXbPujvDBz1M0IjjNy4K/st86ZAf6F4rw0ga4Got9FfM xpeSKTqfJ7ynmk7zD+0gVf2G+PT9dTc= X-Google-Smtp-Source: AHgI3IbWt5lm/aGrzCfJiwrPwqaDk7ZIc63a9z5Npk+IkEzAgBehkg619WzClgKIxmnZ2nkhp+nLrw== X-Received: by 2002:a63:3541:: with SMTP id c62mr1035911pga.191.1550073315570; Wed, 13 Feb 2019 07:55:15 -0800 (PST) Received: from localhost ([12.206.222.5]) by smtp.gmail.com with ESMTPSA id p6sm12871499pfp.15.2019.02.13.07.55.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 Feb 2019 07:55:14 -0800 (PST) Date: Wed, 13 Feb 2019 07:54:03 -0800 Message-Id: <20190213155414.22285-25-palmer@sifive.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20190213155414.22285-1-palmer@sifive.com> References: <20190213155414.22285-1-palmer@sifive.com> From: Palmer Dabbelt To: qemu-riscv@nongnu.org X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::544 Subject: [Qemu-devel] [PATCH v7 24/35] target/riscv: Move gen_arith_imm() decoding into trans_* functions X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bastian Koppelmann , Peer Adelt , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Bastian Koppelmann gen_arith_imm() does a lot of decoding manually, which was hard to read in case of the shift instructions and is not necessary anymore with decodetree. Reviewed-by: Richard Henderson Signed-off-by: Bastian Koppelmann Signed-off-by: Peer Adelt --- target/riscv/insn32.decode | 3 +- target/riscv/insn_trans/trans_rvi.inc.c | 98 +++++++++++++++++----- target/riscv/translate.c | 107 ++++++------------------ 3 files changed, 108 insertions(+), 100 deletions(-) diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index ecc46a50cc27..d6b4197841f5 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -35,12 +35,13 @@ # Argument sets: &b imm rs2 rs1 +&i imm rs1 rd &shift shamt rs1 rd &atomic aq rl rs2 rs1 rd # Formats 32: @r ....... ..... ..... ... ..... ....... %rs2 %rs1 %rd -@i ............ ..... ... ..... ....... imm=%imm_i %rs1 %rd +@i ............ ..... ... ..... ....... &i imm=%imm_i %rs1 %rd @b ....... ..... ..... ... ..... ....... &b imm=%imm_b %rs2 %rs1 @s ....... ..... ..... ... ..... ....... imm=%imm_s %rs2 %rs1 @u .................... ..... ....... imm=%imm_u %rd diff --git a/target/riscv/insn_trans/trans_rvi.inc.c b/target/riscv/insn_trans/trans_rvi.inc.c index 6c0e092a231b..ba9cce2a1410 100644 --- a/target/riscv/insn_trans/trans_rvi.inc.c +++ b/target/riscv/insn_trans/trans_rvi.inc.c @@ -217,52 +217,96 @@ static bool trans_sd(DisasContext *ctx, arg_sd *a) static bool trans_addi(DisasContext *ctx, arg_addi *a) { - gen_arith_imm(ctx, OPC_RISC_ADDI, a->rd, a->rs1, a->imm); - return true; + return gen_arith_imm(ctx, a, &tcg_gen_add_tl); } static bool trans_slti(DisasContext *ctx, arg_slti *a) { - gen_arith_imm(ctx, OPC_RISC_SLTI, a->rd, a->rs1, a->imm); + TCGv source1; + source1 = tcg_temp_new(); + gen_get_gpr(source1, a->rs1); + + tcg_gen_setcondi_tl(TCG_COND_LT, source1, source1, a->imm); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); return true; } static bool trans_sltiu(DisasContext *ctx, arg_sltiu *a) { - gen_arith_imm(ctx, OPC_RISC_SLTIU, a->rd, a->rs1, a->imm); + TCGv source1; + source1 = tcg_temp_new(); + gen_get_gpr(source1, a->rs1); + + tcg_gen_setcondi_tl(TCG_COND_LTU, source1, source1, a->imm); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); return true; } static bool trans_xori(DisasContext *ctx, arg_xori *a) { - gen_arith_imm(ctx, OPC_RISC_XORI, a->rd, a->rs1, a->imm); - return true; + return gen_arith_imm(ctx, a, &tcg_gen_xor_tl); } static bool trans_ori(DisasContext *ctx, arg_ori *a) { - gen_arith_imm(ctx, OPC_RISC_ORI, a->rd, a->rs1, a->imm); - return true; + return gen_arith_imm(ctx, a, &tcg_gen_or_tl); } static bool trans_andi(DisasContext *ctx, arg_andi *a) { - gen_arith_imm(ctx, OPC_RISC_ANDI, a->rd, a->rs1, a->imm); - return true; + return gen_arith_imm(ctx, a, &tcg_gen_and_tl); } static bool trans_slli(DisasContext *ctx, arg_slli *a) { - gen_arith_imm(ctx, OPC_RISC_SLLI, a->rd, a->rs1, a->shamt); + if (a->shamt >= TARGET_LONG_BITS) { + return false; + } + + if (a->rd != 0) { + TCGv t = tcg_temp_new(); + gen_get_gpr(t, a->rs1); + + tcg_gen_shli_tl(t, t, a->shamt); + + gen_set_gpr(a->rd, t); + tcg_temp_free(t); + } /* NOP otherwise */ return true; } static bool trans_srli(DisasContext *ctx, arg_srli *a) { - gen_arith_imm(ctx, OPC_RISC_SHIFT_RIGHT_I, a->rd, a->rs1, a->shamt); + if (a->shamt >= TARGET_LONG_BITS) { + return false; + } + + if (a->rd != 0) { + TCGv t = tcg_temp_new(); + gen_get_gpr(t, a->rs1); + + tcg_gen_shri_tl(t, t, a->shamt); + gen_set_gpr(a->rd, t); + tcg_temp_free(t); + } /* NOP otherwise */ return true; } static bool trans_srai(DisasContext *ctx, arg_srai *a) { - gen_arith_imm(ctx, OPC_RISC_SHIFT_RIGHT_I, a->rd, a->rs1, a->shamt | 0x400); + if (a->shamt >= TARGET_LONG_BITS) { + return false; + } + + if (a->rd != 0) { + TCGv t = tcg_temp_new(); + gen_get_gpr(t, a->rs1); + + tcg_gen_sari_tl(t, t, a->shamt); + gen_set_gpr(a->rd, t); + tcg_temp_free(t); + } /* NOP otherwise */ return true; } @@ -329,26 +373,42 @@ static bool trans_and(DisasContext *ctx, arg_and *a) #ifdef TARGET_RISCV64 static bool trans_addiw(DisasContext *ctx, arg_addiw *a) { - gen_arith_imm(ctx, OPC_RISC_ADDIW, a->rd, a->rs1, a->imm); - return true; + return gen_arith_imm(ctx, a, &gen_addw); } static bool trans_slliw(DisasContext *ctx, arg_slliw *a) { - gen_arith_imm(ctx, OPC_RISC_SLLIW, a->rd, a->rs1, a->shamt); + TCGv source1; + source1 = tcg_temp_new(); + gen_get_gpr(source1, a->rs1); + + tcg_gen_shli_tl(source1, source1, a->shamt); + tcg_gen_ext32s_tl(source1, source1); + gen_set_gpr(a->rd, source1); + + tcg_temp_free(source1); return true; } static bool trans_srliw(DisasContext *ctx, arg_srliw *a) { - gen_arith_imm(ctx, OPC_RISC_SHIFT_RIGHT_IW, a->rd, a->rs1, a->shamt); + TCGv t = tcg_temp_new(); + gen_get_gpr(t, a->rs1); + tcg_gen_extract_tl(t, t, a->shamt, 32 - a->shamt); + /* sign-extend for W instructions */ + tcg_gen_ext32s_tl(t, t); + gen_set_gpr(a->rd, t); + tcg_temp_free(t); return true; } static bool trans_sraiw(DisasContext *ctx, arg_sraiw *a) { - gen_arith_imm(ctx, OPC_RISC_SHIFT_RIGHT_IW , a->rd, a->rs1, - a->shamt | 0x400); + TCGv t = tcg_temp_new(); + gen_get_gpr(t, a->rs1); + tcg_gen_sextract_tl(t, t, a->shamt, 32 - a->shamt); + gen_set_gpr(a->rd, t); + tcg_temp_free(t); return true; } diff --git a/target/riscv/translate.c b/target/riscv/translate.c index fbdad5bb08d2..cf75d9b1ff49 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -434,86 +434,6 @@ static void gen_arith(DisasContext *ctx, uint32_t opc, int rd, int rs1, tcg_temp_free(source2); } -static void gen_arith_imm(DisasContext *ctx, uint32_t opc, int rd, - int rs1, target_long imm) -{ - TCGv source1 = tcg_temp_new(); - int shift_len = TARGET_LONG_BITS; - int shift_a; - - gen_get_gpr(source1, rs1); - - switch (opc) { - case OPC_RISC_ADDI: -#if defined(TARGET_RISCV64) - case OPC_RISC_ADDIW: -#endif - tcg_gen_addi_tl(source1, source1, imm); - break; - case OPC_RISC_SLTI: - tcg_gen_setcondi_tl(TCG_COND_LT, source1, source1, imm); - break; - case OPC_RISC_SLTIU: - tcg_gen_setcondi_tl(TCG_COND_LTU, source1, source1, imm); - break; - case OPC_RISC_XORI: - tcg_gen_xori_tl(source1, source1, imm); - break; - case OPC_RISC_ORI: - tcg_gen_ori_tl(source1, source1, imm); - break; - case OPC_RISC_ANDI: - tcg_gen_andi_tl(source1, source1, imm); - break; -#if defined(TARGET_RISCV64) - case OPC_RISC_SLLIW: - shift_len = 32; - /* FALLTHRU */ -#endif - case OPC_RISC_SLLI: - if (imm >= shift_len) { - goto do_illegal; - } - tcg_gen_shli_tl(source1, source1, imm); - break; -#if defined(TARGET_RISCV64) - case OPC_RISC_SHIFT_RIGHT_IW: - shift_len = 32; - /* FALLTHRU */ -#endif - case OPC_RISC_SHIFT_RIGHT_I: - /* differentiate on IMM */ - shift_a = imm & 0x400; - imm &= 0x3ff; - if (imm >= shift_len) { - goto do_illegal; - } - if (imm != 0) { - if (shift_a) { - /* SRAI[W] */ - tcg_gen_sextract_tl(source1, source1, imm, shift_len - imm); - } else { - /* SRLI[W] */ - tcg_gen_extract_tl(source1, source1, imm, shift_len - imm); - } - /* No further sign-extension needed for W instructions. */ - opc &= ~0x8; - } - break; - default: - do_illegal: - gen_exception_illegal(ctx); - return; - } - - if (opc & 0x8) { /* sign-extend for W instructions */ - tcg_gen_ext32s_tl(source1, source1); - } - - gen_set_gpr(rd, source1); - tcg_temp_free(source1); -} - static void gen_jal(DisasContext *ctx, int rd, target_ulong imm) { target_ulong next_pc; @@ -780,6 +700,33 @@ static int ex_rvc_register(int reg) bool decode_insn32(DisasContext *ctx, uint32_t insn); /* Include the auto-generated decoder for 32 bit insn */ #include "decode_insn32.inc.c" + +static bool gen_arith_imm(DisasContext *ctx, arg_i *a, + void(*func)(TCGv, TCGv, TCGv)) +{ + TCGv source1, source2; + source1 = tcg_temp_new(); + source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + tcg_gen_movi_tl(source2, a->imm); + + (*func)(source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); + return true; +} + +#ifdef TARGET_RISCV64 +static void gen_addw(TCGv ret, TCGv arg1, TCGv arg2) +{ + tcg_gen_add_tl(ret, arg1, arg2); + tcg_gen_ext32s_tl(ret, ret); +} +#endif + /* Include insn module translation function */ #include "insn_trans/trans_rvi.inc.c" #include "insn_trans/trans_rvm.inc.c"