private static void add_rm32_imm8(Emulator emu, ModRM modrm)
{
UInt32 rm32 = modrm.get_rm32(emu);
UInt32 imm8 = (UInt32)emu.getSignedCode8(0);
emu.eip += 1;
modrm.set_rm32(emu, rm32 + imm8);
}
static void cmp_rm32_imm8(Emulator emu, ModRM modrm)
{
UInt32 rm32 = modrm.get_rm32(emu);
UInt32 imm8 = (UInt32)emu.getSignedCode8(0);
emu.eip += 1;
UInt64 result = (UInt64)rm32 - (UInt64)imm8;
emu.update_eflags_sub(rm32, imm8, result);
}
// opcode 0xEB
public static void short_jump(Emulator emu)
{
SByte diff = (SByte)emu.getSignedCode8(1);
emu.eip += (UInt32)(diff + 2);
}
// opcode 0x7E
public static void jle(Emulator emu)
{
int diff = emu.eflags.HasFlag(Eflags.ZERO) || (emu.eflags.HasFlag(Eflags.SIGN) != emu.eflags.HasFlag(Eflags.OVERFLOW)) ? emu.getSignedCode8(1) : 0;
emu.eip += (uint)(diff + 2);
}
// opcode 0x79
public static void jns(Emulator emu)
{
int diff = emu.eflags.HasFlag(Eflags.SIGN) ? 0 : emu.getSignedCode8(1);
emu.eip += (uint)(diff + 2);
}
// opcode 0x74
public static void jz(Emulator emu)
{
int diff = emu.eflags.HasFlag(Eflags.ZERO) ? emu.getSignedCode8(1) : 0;
emu.eip += (uint)(diff + 2);
}
