Zimop extension defines an encoding space for 40 MOPs.The Zimop
extension defines 32 MOP instructions named MOP.R.n, where n is
an integer between 0 and 31, inclusive. The Zimop extension
additionally defines 8 MOP instructions named MOP.RR.n, where n
is an integer between 0 and 7.
These 40 MOPs initially are defined to simply write zero to x[rd],
but are designed to be redefined by later extensions to perform some
other action.
Signed-off-by: LIU Zhiwei <zhiwei_...@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.fran...@wdc.com>
---
target/riscv/cpu.c | 2 ++
target/riscv/cpu_cfg.h | 1 +
target/riscv/insn32.decode | 11 ++++++
target/riscv/insn_trans/trans_rvzimop.c.inc | 37 +++++++++++++++++++++
target/riscv/translate.c | 1 +
5 files changed, 52 insertions(+)
create mode 100644 target/riscv/insn_trans/trans_rvzimop.c.inc
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index a2640cf259..d3853a5804 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -113,6 +113,7 @@ const RISCVIsaExtData isa_edata_arr[] = {
ISA_EXT_DATA_ENTRY(zihintntl, PRIV_VERSION_1_10_0, ext_zihintntl),
ISA_EXT_DATA_ENTRY(zihintpause, PRIV_VERSION_1_10_0, ext_zihintpause),
ISA_EXT_DATA_ENTRY(zihpm, PRIV_VERSION_1_12_0, ext_zihpm),
+ ISA_EXT_DATA_ENTRY(zimop, PRIV_VERSION_1_13_0, ext_zimop),
ISA_EXT_DATA_ENTRY(zmmul, PRIV_VERSION_1_12_0, ext_zmmul),
ISA_EXT_DATA_ENTRY(za64rs, PRIV_VERSION_1_12_0, has_priv_1_11),
ISA_EXT_DATA_ENTRY(zaamo, PRIV_VERSION_1_12_0, ext_zaamo),
@@ -1471,6 +1472,7 @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
MULTI_EXT_CFG_BOOL("zicsr", ext_zicsr, true),
MULTI_EXT_CFG_BOOL("zihintntl", ext_zihintntl, true),
MULTI_EXT_CFG_BOOL("zihintpause", ext_zihintpause, true),
+ MULTI_EXT_CFG_BOOL("zimop", ext_zimop, false),
MULTI_EXT_CFG_BOOL("zacas", ext_zacas, false),
MULTI_EXT_CFG_BOOL("zaamo", ext_zaamo, false),
MULTI_EXT_CFG_BOOL("zalrsc", ext_zalrsc, false),
diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index fb7eebde52..9f53512053 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -71,6 +71,7 @@ struct RISCVCPUConfig {
bool ext_zihintntl;
bool ext_zihintpause;
bool ext_zihpm;
+ bool ext_zimop;
bool ext_ztso;
bool ext_smstateen;
bool ext_sstc;
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index f22df04cfd..972a1e8fd1 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -38,6 +38,8 @@
%imm_bs 30:2 !function=ex_shift_3
%imm_rnum 20:4
%imm_z6 26:1 15:5
+%imm_mop5 30:1 26:2 20:2
+%imm_mop3 30:1 26:2
# Argument sets:
&empty
@@ -56,6 +58,8 @@
&r2nfvm vm rd rs1 nf
&rnfvm vm rd rs1 rs2 nf
&k_aes shamt rs2 rs1 rd
+&mop5 imm rd rs1
+&mop3 imm rd rs1 rs2
# Formats 32:
@r ....... ..... ..... ... ..... ....... &r %rs2 %rs1
%rd
@@ -98,6 +102,9 @@
@k_aes .. ..... ..... ..... ... ..... ....... &k_aes shamt=%imm_bs %rs2
%rs1 %rd
@i_aes .. ..... ..... ..... ... ..... ....... &i imm=%imm_rnum
%rs1 %rd
+@mop5 . . .. .. .... .. ..... ... ..... ....... &mop5 imm=%imm_mop5 %rd %rs1
+@mop3 . . .. .. . ..... ..... ... ..... ....... &mop3 imm=%imm_mop3 %rd %rs1
%rs2
+
# Formats 64:
@sh5 ....... ..... ..... ... ..... ....... &shift shamt=%sh5 %rs1
%rd
@@ -1010,3 +1017,7 @@ amocas_w 00101 . . ..... ..... 010 ..... 0101111
@atom_st
amocas_d 00101 . . ..... ..... 011 ..... 0101111 @atom_st
# *** RV64 Zacas Standard Extension ***
amocas_q 00101 . . ..... ..... 100 ..... 0101111 @atom_st
+
+# *** Zimop may-be-operation extension ***
+mop_r_n 1 . 00 .. 0111 .. ..... 100 ..... 0111011 @mop5
+mop_rr_n 1 . 00 .. 1 ..... ..... 100 ..... 0111011 @mop3
diff --git a/target/riscv/insn_trans/trans_rvzimop.c.inc
b/target/riscv/insn_trans/trans_rvzimop.c.inc
new file mode 100644
index 0000000000..165aacd2b6
--- /dev/null
+++ b/target/riscv/insn_trans/trans_rvzimop.c.inc
@@ -0,0 +1,37 @@
+/*
+ * RISC-V translation routines for May-Be-Operation(zimop).
+ *
+ * Copyright (c) 2024 Alibaba Group.
+ *
+ * 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/>.
+ */
+
+#define REQUIRE_ZIMOP(ctx) do { \
+ if (!ctx->cfg_ptr->ext_zimop) { \
+ return false; \
+ } \
+} while (0)
+
+static bool trans_mop_r_n(DisasContext *ctx, arg_mop_r_n *a)
+{
+ REQUIRE_ZIMOP(ctx);
+ gen_set_gpr(ctx, a->rd, ctx->zero);
+ return true;
+}
+
+static bool trans_mop_rr_n(DisasContext *ctx, arg_mop_rr_n *a)
+{
+ REQUIRE_ZIMOP(ctx);
+ gen_set_gpr(ctx, a->rd, ctx->zero);
+ return true;
+}
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 0569224e53..379b68289f 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -1099,6 +1099,7 @@ static uint32_t opcode_at(DisasContextBase *dcbase,
target_ulong pc)
#include "insn_trans/trans_rvzacas.c.inc"
#include "insn_trans/trans_rvzawrs.c.inc"
#include "insn_trans/trans_rvzicbo.c.inc"
+#include "insn_trans/trans_rvzimop.c.inc"
#include "insn_trans/trans_rvzfa.c.inc"
#include "insn_trans/trans_rvzfh.c.inc"
#include "insn_trans/trans_rvk.c.inc"
--
2.25.1
