Method emit_muldiv

src/cgenerator.cpp:512–543

}

void N64Recomp::CGenerator::emit_muldiv(InstrId instr_id, int reg1, int reg2) const {
    switch (instr_id) {
        case InstrId::cpu_mult:
            fmt::print(output_file, "result = S64(S32({})) * S64(S32({})); lo = S32(result >> 0); hi = S32(result >> 32);\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_dmult:
            fmt::print(output_file, "DMULT(S64({}), S64({}), &lo, &hi);\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_multu:
            fmt::print(output_file, "result = U64(U32({})) * U64(U32({})); lo = S32(result >> 0); hi = S32(result >> 32);\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_dmultu:
            fmt::print(output_file, "DMULTU(U64({}), U64({}), &lo, &hi);\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_div:
            // Cast to 64-bits before division to prevent artihmetic exception for s32(0x80000000) / -1
            fmt::print(output_file, "lo = S32(S64(S32({0})) / S64(S32({1}))); hi = S32(S64(S32({0})) % S64(S32({1})));\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_ddiv:
            fmt::print(output_file, "DDIV(S64({}), S64({}), &lo, &hi);\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_divu:
            fmt::print(output_file, "lo = S32(U32({0}) / U32({1})); hi = S32(U32({0}) % U32({1}));\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        case InstrId::cpu_ddivu:
            fmt::print(output_file, "DDIVU(U64({}), U64({}), &lo, &hi);\n", gpr_to_string(reg1), gpr_to_string(reg2));
            break;
        default:
            assert(false);
            break;
    }
}

void N64Recomp::CGenerator::emit_syscall(uint32_t instr_vram) const {
    fmt::print(output_file, "recomp_syscall_handler(rdram, ctx, 0x{:08X});\n", instr_vram);