From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40820) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gDlTY-000221-Od for qemu-devel@nongnu.org; Sat, 20 Oct 2018 03:15:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gDlTW-0004IK-IS for qemu-devel@nongnu.org; Sat, 20 Oct 2018 03:15:08 -0400 Received: from mail.uni-paderborn.de ([131.234.142.9]:41626) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gDlTW-0004H4-55 for qemu-devel@nongnu.org; Sat, 20 Oct 2018 03:15:06 -0400 From: Bastian Koppelmann Date: Sat, 20 Oct 2018 09:14:31 +0200 Message-Id: <20181020071451.27808-10-kbastian@mail.uni-paderborn.de> In-Reply-To: <20181020071451.27808-1-kbastian@mail.uni-paderborn.de> References: <20181020071451.27808-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v2 09/29] target/riscv: Convert RV32A insns to decodetree List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: mjc@sifive.com, sagark@eecs.berkeley.edu, palmer@sifive.com, kbastian@mail.uni-paderborn.de Cc: peer.adelt@hni.uni-paderborn.de, Alistair.Francis@wdc.com, richard.henderson@linaro.org, qemu-devel@nongnu.org Signed-off-by: Bastian Koppelmann Signed-off-by: Peer Adelt --- v1 -> v2: - simplified gen_amo() with function pointers - rs2 @atom_ld is now decimal target/riscv/insn32.decode | 17 +++ target/riscv/insn_trans/trans_rva.inc.c | 145 ++++++++++++++++++++++++ target/riscv/translate.c | 1 + 3 files changed, 163 insertions(+) create mode 100644 target/riscv/insn_trans/trans_rva.inc.c diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index a484844f34..687eadcaa5 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -38,6 +38,7 @@ # Argument sets: &branch imm rs2 rs1 &shift shamt rs1 rd +&atomic aq rl rs2 rs1 rd # Formats 32: @@ -52,6 +53,9 @@ @sh5 ....... ..... ..... ... ..... ....... &shift shamt=%sh5 %rs1 %rd @csr ............ ..... ... ..... ....... %csr %rs1 %rd +@atom_ld ..... aq:1 rl:1 ..... ........ ..... ....... &atomic rs2=0 %rs1 %rd +@atom_st ..... aq:1 rl:1 ..... ........ ..... ....... &atomic %rs2 %rs1 %rd + # *** RV32I Base Instruction Set *** lui .................... ..... 0110111 @u auipc .................... ..... 0010111 @u @@ -130,3 +134,16 @@ divw 0000001 ..... ..... 100 ..... 0111011 @r divuw 0000001 ..... ..... 101 ..... 0111011 @r remw 0000001 ..... ..... 110 ..... 0111011 @r remuw 0000001 ..... ..... 111 ..... 0111011 @r + +# *** RV32A Standard Extension *** +lr_w 00010 . . 00000 ..... 010 ..... 0101111 @atom_ld +sc_w 00011 . . ..... ..... 010 ..... 0101111 @atom_st +amoswap_w 00001 . . ..... ..... 010 ..... 0101111 @atom_st +amoadd_w 00000 . . ..... ..... 010 ..... 0101111 @atom_st +amoxor_w 00100 . . ..... ..... 010 ..... 0101111 @atom_st +amoand_w 01100 . . ..... ..... 010 ..... 0101111 @atom_st +amoor_w 01000 . . ..... ..... 010 ..... 0101111 @atom_st +amomin_w 10000 . . ..... ..... 010 ..... 0101111 @atom_st +amomax_w 10100 . . ..... ..... 010 ..... 0101111 @atom_st +amominu_w 11000 . . ..... ..... 010 ..... 0101111 @atom_st +amomaxu_w 11100 . . ..... ..... 010 ..... 0101111 @atom_st diff --git a/target/riscv/insn_trans/trans_rva.inc.c b/target/riscv/insn_trans/trans_rva.inc.c new file mode 100644 index 0000000000..dd0fb02b23 --- /dev/null +++ b/target/riscv/insn_trans/trans_rva.inc.c @@ -0,0 +1,145 @@ +/* + * RISC-V translation routines for the RV64A Standard Extension. + * + * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu + * Copyright (c) 2018 Peer Adelt, peer.adelt@hni.uni-paderborn.de + * Bastian Koppelmann, kbastian@mail.uni-paderborn.de + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +static inline bool gen_lr(DisasContext *ctx, arg_atomic *a, TCGMemOp mop) +{ + TCGv src1 = tcg_temp_new(); + /* Put addr in load_res, data in load_val. */ + gen_get_gpr(src1, a->rs1); + if (a->rl) { + tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL); + } + tcg_gen_qemu_ld_tl(load_val, src1, ctx->mem_idx, mop); + if (a->aq) { + tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ); + } + tcg_gen_mov_tl(load_res, src1); + gen_set_gpr(a->rd, load_val); + + tcg_temp_free(src1); + return true; +} + +static inline bool gen_sc(DisasContext *ctx, arg_atomic *a, TCGMemOp mop) +{ + TCGv src1 = tcg_temp_new(); + TCGv src2 = tcg_temp_new(); + TCGv dat = tcg_temp_new(); + TCGLabel *l1 = gen_new_label(); + TCGLabel *l2 = gen_new_label(); + + gen_get_gpr(src1, a->rs1); + tcg_gen_brcond_tl(TCG_COND_NE, load_res, src1, l1); + + gen_get_gpr(src2, a->rs2); + /* Note that the TCG atomic primitives are SC, + so we can ignore AQ/RL along this path. */ + tcg_gen_atomic_cmpxchg_tl(src1, load_res, load_val, src2, + ctx->mem_idx, mop); + tcg_gen_setcond_tl(TCG_COND_NE, dat, src1, load_val); + gen_set_gpr(a->rd, dat); + tcg_gen_br(l2); + + gen_set_label(l1); + /* Address comparion failure. However, we still need to + provide the memory barrier implied by AQ/RL. */ + tcg_gen_mb(TCG_MO_ALL + a->aq * TCG_BAR_LDAQ + a->rl * TCG_BAR_STRL); + tcg_gen_movi_tl(dat, 1); + gen_set_gpr(a->rd, dat); + + gen_set_label(l2); + tcg_temp_free(dat); + tcg_temp_free(src1); + tcg_temp_free(src2); + return true; +} + +static bool gen_amo(DisasContext *ctx, arg_atomic *a, + void(*func)(TCGv, TCGv, TCGv, TCGArg, TCGMemOp), + TCGMemOp mop) +{ + TCGv src1 = tcg_temp_new(); + TCGv src2 = tcg_temp_new(); + + gen_get_gpr(src1, a->rs1); + gen_get_gpr(src2, a->rs2); + + (*func)(src2, src1, src2, ctx->mem_idx, mop); + + gen_set_gpr(a->rd, src2); + tcg_temp_free(src1); + tcg_temp_free(src2); + return true; +} + +static bool trans_lr_w(DisasContext *ctx, arg_lr_w *a, uint32_t insn) +{ + return gen_lr(ctx, a, (MO_ALIGN | MO_TESL)); +} + +static bool trans_sc_w(DisasContext *ctx, arg_sc_w *a, uint32_t insn) +{ + return gen_sc(ctx, a, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amoswap_w(DisasContext *ctx, arg_amoswap_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_xchg_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amoadd_w(DisasContext *ctx, arg_amoadd_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_add_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amoxor_w(DisasContext *ctx, arg_amoxor_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_xor_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amoand_w(DisasContext *ctx, arg_amoand_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_and_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amoor_w(DisasContext *ctx, arg_amoor_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_or_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amomin_w(DisasContext *ctx, arg_amomin_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_smin_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amomax_w(DisasContext *ctx, arg_amomax_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_smax_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amominu_w(DisasContext *ctx, arg_amominu_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_umin_tl, (MO_ALIGN | MO_TESL)); +} + +static bool trans_amomaxu_w(DisasContext *ctx, arg_amomaxu_w *a, uint32_t insn) +{ + return gen_amo(ctx, a, &tcg_gen_atomic_fetch_umax_tl, (MO_ALIGN | MO_TESL)); +} diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 17c4d79b18..d6e8d9700f 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1640,6 +1640,7 @@ bool decode_insn32(DisasContext *ctx, uint32_t insn); /* Include insn module translation function */ #include "insn_trans/trans_rvi.inc.c" #include "insn_trans/trans_rvm.inc.c" +#include "insn_trans/trans_rva.inc.c" static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) { -- 2.19.1