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List: gdb-patches
Subject: Re: [PATCH v7 1/1] sim: riscv: Add support for compressed integer instructions
From: Andrew Burgess <aburgess () redhat ! com>
Date: 2024-01-31 18:18:18
Message-ID: 87jznpxt79.fsf () redhat ! com
[Download RAW message or body]
Thanks for pushing at this. Sorry it's taking a while to get merged,
but I think we're getting close, I just have a one minor thing I'd like
changed, see below...
<jaydeep.patil@imgtec.com> writes:
> From: Jaydeep Patil <jaydeep.patil@imgtec.com>
>
> Added support for simulation of compressed integer instruction set ("c").
> Added test file sim/testsuite/riscv/c-ext.s to test compressed instructions.
> The compressed instructions are available for models implementing C extension.
> Such as RV32IC, RV64IC, RV32GC, RV64GC etc.
> ---
> sim/riscv/model_list.def | 9 +
> sim/riscv/sim-main.c | 332 +++++++++++++++++++++++++++++++-
> sim/testsuite/riscv/allinsn.exp | 2 +-
> sim/testsuite/riscv/c-ext.s | 95 +++++++++
> sim/testsuite/riscv/jalr.s | 2 +-
> sim/testsuite/riscv/m-ext.s | 2 +-
> sim/testsuite/riscv/pass.s | 2 +-
> 7 files changed, 436 insertions(+), 8 deletions(-)
> create mode 100644 sim/testsuite/riscv/c-ext.s
>
> diff --git a/sim/riscv/model_list.def b/sim/riscv/model_list.def
> index 5efd85ab280..b83557e5539 100644
> --- a/sim/riscv/model_list.def
> +++ b/sim/riscv/model_list.def
> @@ -3,7 +3,16 @@ M(I)
> M(IM)
> M(IMA)
> M(IA)
> +M(GC)
> +M(IC)
> +M(IMC)
> +M(IMAC)
> +M(IAC)
> M(E)
> M(EM)
> M(EMA)
> M(EA)
> +M(EC)
> +M(EMC)
> +M(EMAC)
> +M(EAC)
> diff --git a/sim/riscv/sim-main.c b/sim/riscv/sim-main.c
> index 0b05f1ce861..71bb516187e 100644
> --- a/sim/riscv/sim-main.c
> +++ b/sim/riscv/sim-main.c
> @@ -973,6 +973,320 @@ execute_a (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op)
> return pc;
> }
>
> +static sim_cia
> +execute_c (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op)
> +{
> + SIM_DESC sd = CPU_STATE (cpu);
> + struct riscv_sim_cpu *riscv_cpu = RISCV_SIM_CPU (cpu);
> + int rd = (iw >> OP_SH_RD) & OP_MASK_RD;
> + int rs1_c = ((iw >> OP_SH_CRS1S) & OP_MASK_CRS1S) + 8;
> + int rs2 = (iw >> OP_SH_CRS2) & OP_MASK_CRS2;
> + int rs2_c = ((iw >> OP_SH_CRS2S) & OP_MASK_CRS2S) + 8;
> + const char *rd_name = riscv_gpr_names_abi[rd];
> + const char *rs1_c_name = riscv_gpr_names_abi[rs1_c];
> + const char *rs2_name = riscv_gpr_names_abi[rs2];
> + const char *rs2_c_name = riscv_gpr_names_abi[rs2_c];
> + signed_word imm;
> + unsigned_word tmp;
> + sim_cia pc = riscv_cpu->pc + 2;
> +
> + switch (op->match)
> + {
> + case MATCH_C_JR | MATCH_C_MV:
> + switch (op->mask)
> + {
> + case MASK_C_MV:
> + TRACE_INSN (cpu, "c.mv %s, %s; // %s = %s",
> + rd_name, rs2_name, rd_name, rs2_name);
> + store_rd (cpu, rd, riscv_cpu->regs[rs2]);
> + break;
> + case MASK_C_JR:
> + TRACE_INSN (cpu, "c.jr %s;",
> + rd_name);
> + pc = riscv_cpu->regs[rd];
> + TRACE_BRANCH (cpu, "to %#" PRIxTW, pc);
> + break;
> + }
> + break;
> + case MATCH_C_J:
> + imm = EXTRACT_CJTYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.j %" PRIxTW,
> + imm);
> + pc = riscv_cpu->pc + imm;
> + TRACE_BRANCH (cpu, "to %#" PRIxTW, pc);
> + break;
> + case MATCH_C_JAL | MATCH_C_ADDIW:
> + /* JAL and ADDIW have the same mask, so switch based on op name. */
> + switch (op->name[2])
> + {
> + case 'j':
I found this pretty confusing. My first thought was: if we can only
decode this by checking the instruction mnemonic then how does real h/w
decode it...
... which was then followed by my second though: wait, how did we figure
out the correct mnemonic?
I think it would be much clearer what's going on here if we did an
architecture size check. I think:
/* JAL and ADDIW have the same mask but are only available on RV64 or
RV32 respectively. */
if (RISCV_XLEN (cpu) == 32)
// Handle c.addiw
else if (RISCV_XLEN (cpu) == 64)
// Handle c.jal
else
// Unhandled insn.
Or use a switch if that's more your thing.
With that done:
Approved-By: Andrew Burgess <aburgess@redhat.com>
Thanks,
Andrew
> + imm = EXTRACT_CJTYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.jal %" PRIxTW,
> + imm);
> + store_rd (cpu, SIM_RISCV_RA_REGNUM, riscv_cpu->pc + 2);
> + pc = riscv_cpu->pc + imm;
> + TRACE_BRANCH (cpu, "to %#" PRIxTW, pc);
> + break;
> + case 'a':
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.addiw %s, %s, %#" PRIxTW "; // %s += %#" PRIxTW,
> + rd_name, rd_name, imm, rd_name, imm);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + store_rd (cpu, rd, EXTEND32 (riscv_cpu->regs[rd] + imm));
> + break;
> + default:
> + TRACE_INSN (cpu, "UNHANDLED INSN: %s", op->name);
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + }
> + break;
> + case MATCH_C_JALR | MATCH_C_ADD | MATCH_C_EBREAK:
> + switch (op->mask)
> + {
> + case MASK_C_ADD:
> + TRACE_INSN (cpu, "c.add %s, %s; // %s += %s",
> + rd_name, rs2_name, rd_name, rs2_name);
> + store_rd (cpu, rd, riscv_cpu->regs[rd] + riscv_cpu->regs[rs2]);
> + break;
> + case MASK_C_JALR:
> + TRACE_INSN (cpu, "c.jalr %s, %s;",
> + riscv_gpr_names_abi[SIM_RISCV_RA_REGNUM], rd_name);
> + store_rd (cpu, SIM_RISCV_RA_REGNUM, riscv_cpu->pc + 2);
> + pc = riscv_cpu->regs[rd];
> + TRACE_BRANCH (cpu, "to %#" PRIxTW, pc);
> + break;
> + case MASK_C_EBREAK:
> + TRACE_INSN (cpu, "ebreak");
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_stopped,
> + SIM_SIGTRAP);
> + }
> + break;
> + case MATCH_C_BEQZ:
> + imm = EXTRACT_CBTYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.beqz %s, %#" PRIxTW "; "
> + "// if (%s == 0) goto %#" PRIxTW,
> + rs1_c_name, imm, rs1_c_name, riscv_cpu->pc + imm);
> + if (riscv_cpu->regs[rs1_c] == riscv_cpu->regs[0])
> + {
> + pc = riscv_cpu->pc + imm;
> + TRACE_BRANCH (cpu, "to %#" PRIxTW, pc);
> + }
> + break;
> + case MATCH_C_BNEZ:
> + imm = EXTRACT_CBTYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.bnez %s, %#" PRIxTW "; "
> + "// if (%s != 0) goto %#" PRIxTW,
> + rs1_c_name, imm, rs1_c_name, riscv_cpu->pc + imm);
> + if (riscv_cpu->regs[rs1_c] != riscv_cpu->regs[0])
> + {
> + pc = riscv_cpu->pc + imm;
> + TRACE_BRANCH (cpu, "to %#" PRIxTW, pc);
> + }
> + break;
> + case MATCH_C_LWSP:
> + imm = EXTRACT_CITYPE_LWSP_IMM (iw);
> + TRACE_INSN (cpu, "c.lwsp %s, %" PRIiTW "(sp);",
> + rd_name, imm);
> + store_rd (cpu, rd, EXTEND32 (
> + sim_core_read_unaligned_4 (cpu, riscv_cpu->pc, read_map,
> + riscv_cpu->regs[SIM_RISCV_SP_REGNUM]
> + + imm)));
> + break;
> + case MATCH_C_LW:
> + imm = EXTRACT_CLTYPE_LW_IMM (iw);
> + TRACE_INSN (cpu, "c.lw %s, %" PRIiTW "(%s);",
> + rs2_c_name, imm, rs1_c_name);
> + store_rd (cpu, rs2_c, EXTEND32 (
> + sim_core_read_unaligned_4 (cpu, riscv_cpu->pc, read_map,
> + riscv_cpu->regs[rs1_c] + imm)));
> + break;
> + case MATCH_C_SWSP:
> + imm = EXTRACT_CSSTYPE_SWSP_IMM (iw);
> + TRACE_INSN (cpu, "c.swsp %s, %" PRIiTW "(sp);",
> + rs2_name, imm);
> + sim_core_write_unaligned_4 (cpu, riscv_cpu->pc, write_map,
> + riscv_cpu->regs[SIM_RISCV_SP_REGNUM] + imm,
> + riscv_cpu->regs[rs2]);
> + break;
> + case MATCH_C_SW:
> + imm = EXTRACT_CLTYPE_LW_IMM (iw);
> + TRACE_INSN (cpu, "c.sw %s, %" PRIiTW "(%s);",
> + rs2_c_name, imm, rs1_c_name);
> + sim_core_write_unaligned_4 (cpu, riscv_cpu->pc, write_map,
> + riscv_cpu->regs[rs1_c] + (imm),
> + riscv_cpu->regs[rs2_c]);
> + break;
> + case MATCH_C_ADDI:
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.addi %s, %s, %#" PRIxTW "; // %s += %#" PRIxTW,
> + rd_name, rd_name, imm, rd_name, imm);
> + store_rd (cpu, rd, riscv_cpu->regs[rd] + imm);
> + break;
> + case MATCH_C_LUI:
> + imm = EXTRACT_CITYPE_LUI_IMM (iw);
> + TRACE_INSN (cpu, "c.lui %s, %#" PRIxTW ";",
> + rd_name, imm);
> + store_rd (cpu, rd, imm);
> + break;
> + case MATCH_C_LI:
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.li %s, %#" PRIxTW "; // %s = %#" PRIxTW,
> + rd_name, imm, rd_name, imm);
> + store_rd (cpu, rd, imm);
> + break;
> + case MATCH_C_ADDI4SPN:
> + imm = EXTRACT_CIWTYPE_ADDI4SPN_IMM (iw);
> + TRACE_INSN (cpu, "c.addi4spn %s, %" PRIiTW "; // %s = sp + %" PRIiTW,
> + rs2_c_name, imm, rs2_c_name, imm);
> + store_rd (cpu, rs2_c, riscv_cpu->regs[SIM_RISCV_SP_REGNUM] + (imm));
> + break;
> + case MATCH_C_ADDI16SP:
> + imm = EXTRACT_CITYPE_ADDI16SP_IMM (iw);
> + TRACE_INSN (cpu, "c.addi16sp %s, %" PRIiTW "; // %s = sp + %" PRIiTW,
> + rd_name, imm, rd_name, imm);
> + store_rd (cpu, rd, riscv_cpu->regs[SIM_RISCV_SP_REGNUM] + imm);
> + break;
> + case MATCH_C_SUB:
> + TRACE_INSN (cpu, "c.sub %s, %s; // %s = %s - %s",
> + rs1_c_name, rs2_c_name, rs1_c_name, rs1_c_name, rs2_c_name);
> + store_rd (cpu, rs1_c, riscv_cpu->regs[rs1_c] - riscv_cpu->regs[rs2_c]);
> + break;
> + case MATCH_C_AND:
> + TRACE_INSN (cpu, "c.and %s, %s; // %s = %s & %s",
> + rs1_c_name, rs2_c_name, rs1_c_name, rs1_c_name, rs2_c_name);
> + store_rd (cpu, rs1_c, riscv_cpu->regs[rs1_c] & riscv_cpu->regs[rs2_c]);
> + break;
> + case MATCH_C_OR:
> + TRACE_INSN (cpu, "c.or %s, %s; // %s = %s | %s",
> + rs1_c_name, rs2_c_name, rs1_c_name, rs1_c_name, rs2_c_name);
> + store_rd (cpu, rs1_c, riscv_cpu->regs[rs1_c] | riscv_cpu->regs[rs2_c]);
> + break;
> + case MATCH_C_XOR:
> + TRACE_INSN (cpu, "c.xor %s, %s; // %s = %s ^ %s",
> + rs1_c_name, rs2_c_name, rs1_c_name, rs1_c_name, rs2_c_name);
> + store_rd (cpu, rs1_c, riscv_cpu->regs[rs1_c] ^ riscv_cpu->regs[rs2_c]);
> + break;
> + case MATCH_C_SLLI | MATCH_C_SLLI64:
> + if (op->mask == MASK_C_SLLI64)
> + {
> + /* Reserved for custom use. */
> + TRACE_INSN (cpu, "UNHANDLED INSN: %s", op->name);
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + break;
> + }
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.slli %s, %" PRIiTW "; // %s = %s << %#" PRIxTW,
> + rd_name, imm, rd_name, rd_name, imm);
> + store_rd (cpu, rd, riscv_cpu->regs[rd] << imm);
> + break;
> + case MATCH_C_SRLI | MATCH_C_SRLI64:
> + if (op->mask == MASK_C_SRLI64)
> + {
> + /* Reserved for custom use. */
> + TRACE_INSN (cpu, "UNHANDLED INSN: %s", op->name);
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + break;
> + }
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.srli %s, %" PRIiTW "; // %s = %s >> %#" PRIxTW,
> + rs1_c_name, imm, rs1_c_name, rs1_c_name, imm);
> + if (RISCV_XLEN (cpu) == 32)
> + store_rd (cpu, rs1_c,
> + EXTEND32 ((uint32_t) riscv_cpu->regs[rs1_c] >> imm));
> + else
> + store_rd (cpu, rs1_c, riscv_cpu->regs[rs1_c] >> imm);
> + break;
> + case MATCH_C_SRAI | MATCH_C_SRAI64:
> + if (op->mask == MASK_C_SRAI64)
> + {
> + /* Reserved for custom use. */
> + TRACE_INSN (cpu, "UNHANDLED INSN: %s", op->name);
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + break;
> + }
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.srai %s, %" PRIiTW "; // %s = %s >> %#" PRIxTW,
> + rs1_c_name, imm, rs1_c_name, rs1_c_name, imm);
> + if (RISCV_XLEN (cpu) == 32)
> + {
> + if (imm > 0x1f)
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + tmp = ashiftrt (riscv_cpu->regs[rs1_c], imm);
> + }
> + else
> + tmp = ashiftrt64 (riscv_cpu->regs[rs1_c], imm);
> + store_rd (cpu, rd, tmp);
> + break;
> + case MATCH_C_ANDI:
> + imm = EXTRACT_CITYPE_IMM (iw);
> + TRACE_INSN (cpu, "c.andi %s, %" PRIiTW "; // %s = %s & %#" PRIxTW,
> + rs1_c_name, imm, rs1_c_name, rs1_c_name, imm);
> + store_rd (cpu, rs1_c, riscv_cpu->regs[rs1_c] & imm);
> + break;
> + case MATCH_C_ADDW:
> + TRACE_INSN (cpu, "c.addw %s, %s; // %s = %s + %s",
> + rs1_c_name, rs2_c_name, rs1_c_name, rs1_c_name, rs2_c_name);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + store_rd (cpu, rs1_c,
> + EXTEND32 (riscv_cpu->regs[rs1_c] + riscv_cpu->regs[rs2_c]));
> + break;
> + case MATCH_C_SUBW:
> + TRACE_INSN (cpu, "c.subw %s, %s; // %s = %s - %s",
> + rs1_c_name, rs2_c_name, rs1_c_name, rs1_c_name, rs2_c_name);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + store_rd (cpu, rs1_c,
> + EXTEND32 (riscv_cpu->regs[rs1_c] - riscv_cpu->regs[rs2_c]));
> + break;
> + case MATCH_C_LDSP:
> + imm = EXTRACT_CITYPE_LDSP_IMM (iw);
> + TRACE_INSN (cpu, "c.ldsp %s, %" PRIiTW "(sp);",
> + rd_name, imm);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + store_rd (cpu, rd,
> + sim_core_read_unaligned_8 (cpu, riscv_cpu->pc, read_map,
> + riscv_cpu->regs[SIM_RISCV_SP_REGNUM]
> + + imm));
> + break;
> + case MATCH_C_LD:
> + imm = EXTRACT_CLTYPE_LD_IMM (iw);
> + TRACE_INSN (cpu, "c.ld %s, %" PRIiTW "(%s);",
> + rs1_c_name, imm, rs2_c_name);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + store_rd (cpu, rs2_c,
> + sim_core_read_unaligned_8 (cpu, riscv_cpu->pc, read_map,
> + riscv_cpu->regs[rs1_c] + imm));
> + break;
> + case MATCH_C_SDSP:
> + imm = EXTRACT_CSSTYPE_SDSP_IMM (iw);
> + TRACE_INSN (cpu, "c.sdsp %s, %" PRIiTW "(sp);",
> + rs2_name, imm);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + sim_core_write_unaligned_8 (cpu, riscv_cpu->pc, write_map,
> + riscv_cpu->regs[SIM_RISCV_SP_REGNUM] + imm,
> + riscv_cpu->regs[rs2]);
> + break;
> + case MATCH_C_SD:
> + imm = EXTRACT_CLTYPE_LD_IMM (iw);
> + TRACE_INSN (cpu, "c.sd %s, %" PRIiTW "(%s);",
> + rs2_c_name, imm, rs1_c_name);
> + RISCV_ASSERT_RV64 (cpu, "insn: %s", op->name);
> + sim_core_write_unaligned_8 (cpu, riscv_cpu->pc, write_map,
> + riscv_cpu->regs[rs1_c] + imm,
> + riscv_cpu->regs[rs2_c]);
> + break;
> + default:
> + TRACE_INSN (cpu, "UNHANDLED INSN: %s", op->name);
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + }
> +
> + return pc;
> +}
> +
> static sim_cia
> execute_one (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op)
> {
> @@ -988,6 +1302,16 @@ execute_one (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op)
> {
> case INSN_CLASS_A:
> return execute_a (cpu, iw, op);
> + case INSN_CLASS_C:
> + /* Check whether model with C extension is selected. */
> + if (riscv_cpu->csr.misa & 4)
> + return execute_c (cpu, iw, op);
> + else
> + {
> + TRACE_INSN (cpu, "UNHANDLED EXTENSION: %d", op->insn_class);
> + sim_engine_halt (sd, cpu, NULL, riscv_cpu->pc, sim_signalled,
> + SIM_SIGILL);
> + }
> case INSN_CLASS_I:
> return execute_i (cpu, iw, op);
> case INSN_CLASS_M:
> @@ -1018,17 +1342,17 @@ void step_once (SIM_CPU *cpu)
>
> iw = sim_core_read_aligned_2 (cpu, pc, exec_map, pc);
>
> - /* Reject non-32-bit opcodes first. */
> len = riscv_insn_length (iw);
> - if (len != 4)
> + if (len != 4 && len != 2)
> {
> sim_io_printf (sd, "sim: bad insn len %#x @ %#" PRIxTA ": %#" PRIxTW "\n",
> len, pc, iw);
> sim_engine_halt (sd, cpu, NULL, pc, sim_signalled, SIM_SIGILL);
> }
>
> - iw |= ((unsigned_word) sim_core_read_aligned_2 (
> - cpu, pc, exec_map, pc + 2) << 16);
> + if (len == 4)
> + iw |= ((unsigned_word) sim_core_read_aligned_2
> + (cpu, pc, exec_map, pc + 2) << 16);
>
> TRACE_CORE (cpu, "0x%08" PRIxTW, iw);
>
> diff --git a/sim/testsuite/riscv/allinsn.exp b/sim/testsuite/riscv/allinsn.exp
> index 972edf4d5ec..9d454039467 100644
> --- a/sim/testsuite/riscv/allinsn.exp
> +++ b/sim/testsuite/riscv/allinsn.exp
> @@ -3,7 +3,7 @@
> sim_init
>
> # all machines
> -set all_machs "riscv"
> +set all_machs "riscv32 riscv64"
>
> foreach src [lsort [glob -nocomplain $srcdir/$subdir/*.s]] {
> # If we're only testing specific files and this isn't one of them, skip it.
> diff --git a/sim/testsuite/riscv/c-ext.s b/sim/testsuite/riscv/c-ext.s
> new file mode 100644
> index 00000000000..ad6e7b239f2
> --- /dev/null
> +++ b/sim/testsuite/riscv/c-ext.s
> @@ -0,0 +1,95 @@
> +# Basic Tests for C extension.
> +# mach: riscv32 riscv64
> +# sim(riscv32): --model RV32IC
> +# sim(riscv64): --model RV64IC
> +# ld(riscv32): -m elf32lriscv
> +# ld(riscv64): -m elf64lriscv
> +# as(riscv32): -march=rv32ic
> +# as(riscv64): -march=rv64ic
> +
> +.include "testutils.inc"
> +
> + .data
> + .align 4
> +_data:
> + .word 1234
> + .word 0
> +
> + start
> + la a0, _data
> +
> + # Test load-store instructions.
> + c.lw a1,0(a0)
> + c.sw a1,4(a0)
> + c.lw a2,4(a0)
> +
> + li a5,1234
> + bne a1,a5,test_fail
> + bne a2,a5,test_fail
> +
> + # Test basic arithmetic.
> + c.li a0,0
> + c.li a1,1
> + c.addi a0,1
> + c.addi a0,-1
> + c.add a0,a1
> + c.sub a0,a1
> +
> + li a5,1
> + bne a0,x0,test_fail
> + bne a1,a5,test_fail
> +
> + # Test logical operations.
> + c.li a0,7
> + c.li a1,7
> + c.li a2,4
> + c.li a3,3
> + c.li a4,3
> + c.andi a0,3
> + c.and a1,a0
> + c.or a2,a3
> + c.xor a4,a4
> +
> + li a5,3
> + bne a0,a5,test_fail
> + bne a1,a5,test_fail
> + bne a4,x0,test_fail
> + li a5,7
> + bne a2,a5,test_fail
> +
> + # Test shift operations.
> + c.li a0,4
> + c.li a1,4
> + c.slli a0,1
> + c.srli a1,1
> +
> + li a5,8
> + bne a0,a5,test_fail
> + li a5,2
> + bne a1,a5,test_fail
> +
> + # Test jump instruction.
> + c.j 1f
> +
> + j test_fail
> +1:
> + la a0,2f
> +
> + # Test jump register instruction.
> + c.jr a0
> +
> + j test_fail
> +
> +2:
> + # Test branch instruction.
> + c.li a0,1
> + c.beqz a0,test_fail
> + c.li a0,0
> + c.bnez a0,test_fail
> +
> +test_pass:
> + pass
> + fail
> +
> +test_fail:
> + fail
> diff --git a/sim/testsuite/riscv/jalr.s b/sim/testsuite/riscv/jalr.s
> index daccf4fb5a0..294f48564d8 100644
> --- a/sim/testsuite/riscv/jalr.s
> +++ b/sim/testsuite/riscv/jalr.s
> @@ -1,5 +1,5 @@
> # Basic jalr tests.
> -# mach: riscv
> +# mach: riscv32 riscv64
>
> .include "testutils.inc"
>
> diff --git a/sim/testsuite/riscv/m-ext.s b/sim/testsuite/riscv/m-ext.s
> index b80bd140e76..4247156bea4 100644
> --- a/sim/testsuite/riscv/m-ext.s
> +++ b/sim/testsuite/riscv/m-ext.s
> @@ -1,5 +1,5 @@
> # Check that the RV32M instructions run without any faults.
> -# mach: riscv
> +# mach: riscv32 riscv64
>
> .include "testutils.inc"
>
> diff --git a/sim/testsuite/riscv/pass.s b/sim/testsuite/riscv/pass.s
> index bd428ca1677..a188b83a026 100644
> --- a/sim/testsuite/riscv/pass.s
> +++ b/sim/testsuite/riscv/pass.s
> @@ -1,5 +1,5 @@
> # check that the sim doesn't die immediately.
> -# mach: riscv
> +# mach: riscv32 riscv64
>
> .include "testutils.inc"
>
> --
> 2.25.1
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