Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Signed-off-by: Bastian Koppelmann <kbast...@mail.uni-paderborn.de>
Signed-off-by: Peer Adelt <peer.ad...@hni.uni-paderborn.de>
---
v2 -> v3:
- dropped insn argument of trans_foo functions
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 b37fece633..235f4a031c 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -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 @@
@sh6 ...... ...... ..... ... ..... ....... &shift shamt=%sh6 %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
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..d42d36ebf7
--- /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, sag...@eecs.berkeley.edu
+ * Copyright (c) 2018 Peer Adelt, peer.ad...@hni.uni-paderborn.de
+ * Bastian Koppelmann, kbast...@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)
+{
+ return gen_lr(ctx, a, (MO_ALIGN | MO_TESL));
+}
+
+static bool trans_sc_w(DisasContext *ctx, arg_sc_w *a)
+{
+ return gen_sc(ctx, a, (MO_ALIGN | MO_TESL));
+}
+
+static bool trans_amoswap_w(DisasContext *ctx, arg_amoswap_w *a)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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 8c876187b1..d8fe319f62 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
