diff options
| -rw-r--r-- | qtmips_machine/alu.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/qtmips_machine/alu.cpp b/qtmips_machine/alu.cpp index 3889b44..fbbaff4 100644 --- a/qtmips_machine/alu.cpp +++ b/qtmips_machine/alu.cpp @@ -154,10 +154,20 @@ std::uint32_t machine::alu_operate(enum AluOp operation, std::uint32_t s, alu_write_hi_lo_64bit(regs, u64_val); return 0x0; case ALU_OP_DIV: + if (t == 0) { + regs->write_hi_lo(false, 0); + regs->write_hi_lo(true, 0); + return 0; + } regs->write_hi_lo(false, (std::uint32_t)((std::int32_t)s / (std::int32_t)t)); regs->write_hi_lo(true, (std::uint32_t)((std::int32_t)s % (std::int32_t)t)); return 0x0; case ALU_OP_DIVU: + if (t == 0) { + regs->write_hi_lo(false, 0); + regs->write_hi_lo(true, 0); + return 0; + } regs->write_hi_lo(false, s / t); regs->write_hi_lo(true, s % t); return 0x0; |