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target/riscv: Convert RV32A insns to decodetree 

Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Peer Adelt <peer.adelt@hni.uni-paderborn.de>
This commit is contained in:
Bastian Koppelmann 2019-02-13 07:53:49 -08:00
parent d2e2c1e406
commit 3b77c289ae
3 changed files with 178 additions and 0 deletions
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17
target/riscv/insn32.decode
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@ -34,6 +34,7 @@
# Argument sets:
&b imm rs2 rs1
&shift shamt rs1 rd
&atomic aq rl rs2 rs1 rd
# Formats 32:
@r ....... ..... ..... ... ..... ....... %rs2 %rs1 %rd
@ -46,6 +47,9 @@
@sh ...... ...... ..... ... ..... ....... &shift shamt=%sh10 %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
@ -102,3 +106,16 @@ div 0000001 ..... ..... 100 ..... 0110011 @r
divu 0000001 ..... ..... 101 ..... 0110011 @r
rem 0000001 ..... ..... 110 ..... 0110011 @r
remu 0000001 ..... ..... 111 ..... 0110011 @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

160
target/riscv/insn_trans/trans_rva.inc.c Normal file
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@ -0,0 +1,160 @@
/*
* 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 <http://www.gnu.org/licenses/>.
*/
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)
{
REQUIRE_EXT(ctx, RVA);
return gen_lr(ctx, a, (MO_ALIGN | MO_TESL));
}
static bool trans_sc_w(DisasContext *ctx, arg_sc_w *a)
{
REQUIRE_EXT(ctx, RVA);
return gen_sc(ctx, a, (MO_ALIGN | MO_TESL));
}
static bool trans_amoswap_w(DisasContext *ctx, arg_amoswap_w *a)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
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)
{
REQUIRE_EXT(ctx, RVA);
return gen_amo(ctx, a, &tcg_gen_atomic_fetch_umax_tl, (MO_ALIGN | MO_TESL));
}

1
target/riscv/translate.c
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@ -1853,6 +1853,7 @@ 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(DisasContext *ctx)
{