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This is no bug-fix but it simplifies the code and avoids some unnecessary branches. --- sim/riscv/sim-main.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/sim/riscv/sim-main.c b/sim/riscv/sim-main.c index 515ff835223..e4b15b533ba 100644 --- a/sim/riscv/sim-main.c +++ b/sim/riscv/sim-main.c @@ -700,18 +700,16 @@ execute_m (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op) const char *rd_name = riscv_gpr_names_abi[rd]; const char *rs1_name = riscv_gpr_names_abi[rs1]; const char *rs2_name = riscv_gpr_names_abi[rs2]; - unsigned_word tmp, dividend_max; + unsigned_word tmp; sim_cia pc = riscv_cpu->pc + 4; - dividend_max = -((unsigned_word) 1 << (WITH_TARGET_WORD_BITSIZE - 1)); - switch (op->match) { case MATCH_DIV: TRACE_INSN (cpu, "div %s, %s, %s; // %s = %s / %s", rd_name, rs1_name, rs2_name, rd_name, rs1_name, rs2_name); - if (riscv_cpu->regs[rs1] == dividend_max && riscv_cpu->regs[rs2] == -1) - tmp = dividend_max; + if (riscv_cpu->regs[rs2] == -1) + tmp = -riscv_cpu->regs[rs1]; else if (riscv_cpu->regs[rs2]) tmp = (signed_word) riscv_cpu->regs[rs1] / (signed_word) riscv_cpu->regs[rs2]; @@ -793,7 +791,7 @@ execute_m (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op) case MATCH_REM: TRACE_INSN (cpu, "rem %s, %s, %s; // %s = %s %% %s", rd_name, rs1_name, rs2_name, rd_name, rs1_name, rs2_name); - if (riscv_cpu->regs[rs1] == dividend_max && riscv_cpu->regs[rs2] == -1) + if (riscv_cpu->regs[rs2] == -1) tmp = 0; else if (riscv_cpu->regs[rs2]) tmp = (signed_word) riscv_cpu->regs[rs1] -- 2.39.2