static uint32_t
ropPUSH_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    int host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-2);
    host_reg = LOAD_REG_W(opcode & 7);
    MEM_STORE_ADDR_EA_W(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-2);

    return op_pc;
}
static uint32_t
ropPUSH_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    int host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-4);
    host_reg = LOAD_REG_L(opcode & 7);
    MEM_STORE_ADDR_EA_L(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-4);

    return op_pc;
}

static uint32_t
ropPUSH_imm_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint16_t imm = fetchdat & 0xffff;
    int      host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-2);
    host_reg = LOAD_REG_IMM(imm);
    MEM_STORE_ADDR_EA_W(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-2);

    return op_pc + 2;
}
static uint32_t
ropPUSH_imm_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint32_t imm = fastreadl(cs + op_pc);
    int      host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-4);
    host_reg = LOAD_REG_IMM(imm);
    MEM_STORE_ADDR_EA_L(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-4);

    return op_pc + 4;
}

static uint32_t
ropPUSH_imm_b16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint16_t imm = fetchdat & 0xff;
    int      host_reg;

    if (imm & 0x80)
        imm |= 0xff00;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-2);
    host_reg = LOAD_REG_IMM(imm);
    MEM_STORE_ADDR_EA_W(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-2);

    return op_pc + 1;
}
static uint32_t
ropPUSH_imm_b32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint32_t imm = fetchdat & 0xff;
    int      host_reg;

    if (imm & 0x80)
        imm |= 0xffffff00;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-4);
    host_reg = LOAD_REG_IMM(imm);
    MEM_STORE_ADDR_EA_L(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-4);

    return op_pc + 1;
}

static uint32_t
ropPOP_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(0);
    MEM_LOAD_ADDR_EA_W(&cpu_state.seg_ss);
    SP_MODIFY(2);
    STORE_REG_TARGET_W_RELEASE(0, opcode & 7);

    return op_pc;
}
static uint32_t
ropPOP_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(0);
    MEM_LOAD_ADDR_EA_L(&cpu_state.seg_ss);
    SP_MODIFY(4);
    STORE_REG_TARGET_L_RELEASE(0, opcode & 7);

    return op_pc;
}

static uint32_t
ropRET_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(0);
    MEM_LOAD_ADDR_EA_W(&cpu_state.seg_ss);
    STORE_HOST_REG_ADDR((uintptr_t) &cpu_state.pc, 0);
    SP_MODIFY(2);

    return -1;
}
static uint32_t
ropRET_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(0);
    MEM_LOAD_ADDR_EA_L(&cpu_state.seg_ss);
    STORE_HOST_REG_ADDR((uintptr_t) &cpu_state.pc, 0);
    SP_MODIFY(4);

    return -1;
}

static uint32_t
ropRET_imm_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint16_t offset = fetchdat & 0xffff;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(0);
    MEM_LOAD_ADDR_EA_W(&cpu_state.seg_ss);
    STORE_HOST_REG_ADDR((uintptr_t) &cpu_state.pc, 0);
    SP_MODIFY(2 + offset);

    return -1;
}
static uint32_t
ropRET_imm_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint16_t offset = fetchdat & 0xffff;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(0);
    MEM_LOAD_ADDR_EA_L(&cpu_state.seg_ss);
    STORE_HOST_REG_ADDR((uintptr_t) &cpu_state.pc, 0);
    SP_MODIFY(4 + offset);

    return -1;
}

static uint32_t
ropCALL_r16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint16_t offset = fetchdat & 0xffff;
    int      host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-2);
    host_reg = LOAD_REG_IMM(op_pc + 2);
    MEM_STORE_ADDR_EA_W(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-2);
    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.pc, (op_pc + 2 + offset) & 0xffff);

    return -1;
}
static uint32_t
ropCALL_r32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    uint32_t offset = fastreadl(cs + op_pc);
    int      host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_STACK_TO_EA(-4);
    host_reg = LOAD_REG_IMM(op_pc + 4);
    MEM_STORE_ADDR_EA_L(&cpu_state.seg_ss, host_reg);
    SP_MODIFY(-4);
    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.pc, op_pc + 4 + offset);

    return -1;
}

static uint32_t
ropLEAVE_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    int host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_EBP_TO_EA(0);
    MEM_LOAD_ADDR_EA_W(&cpu_state.seg_ss);
    host_reg = LOAD_REG_W(REG_BP); /*SP = BP + 2*/
    ADD_HOST_REG_IMM_W(host_reg, 2);
    STORE_REG_TARGET_W_RELEASE(host_reg, REG_SP);
    STORE_REG_TARGET_W_RELEASE(0, REG_BP); /*BP = POP_W()*/

    return op_pc;
}
static uint32_t
ropLEAVE_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
    int host_reg;

    STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);
    LOAD_EBP_TO_EA(0);
    MEM_LOAD_ADDR_EA_L(&cpu_state.seg_ss);
    host_reg = LOAD_REG_L(REG_EBP); /*ESP = EBP + 4*/
    ADD_HOST_REG_IMM(host_reg, 4);
    STORE_REG_TARGET_L_RELEASE(host_reg, REG_ESP);
    STORE_REG_TARGET_L_RELEASE(0, REG_EBP); /*EBP = POP_L()*/

    return op_pc;
}

#define ROP_PUSH_SEG(seg)                                                                                     \
    static uint32_t                                                                                           \
    ropPUSH_##seg##_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block) \
    {                                                                                                         \
        int host_reg;                                                                                         \
                                                                                                              \
        STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);                                            \
        LOAD_STACK_TO_EA(-2);                                                                                 \
        host_reg = LOAD_VAR_W((uintptr_t) &seg);                                                              \
        MEM_STORE_ADDR_EA_W(&cpu_state.seg_ss, host_reg);                                                     \
        SP_MODIFY(-2);                                                                                        \
                                                                                                              \
        return op_pc;                                                                                         \
    }                                                                                                         \
    static uint32_t                                                                                           \
    ropPUSH_##seg##_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block) \
    {                                                                                                         \
        int host_reg;                                                                                         \
                                                                                                              \
        STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);                                            \
        LOAD_STACK_TO_EA(-4);                                                                                 \
        host_reg = LOAD_VAR_W((uintptr_t) &seg);                                                              \
        MEM_STORE_ADDR_EA_L(&cpu_state.seg_ss, host_reg);                                                     \
        SP_MODIFY(-4);                                                                                        \
                                                                                                              \
        return op_pc;                                                                                         \
    }

ROP_PUSH_SEG(CS)
ROP_PUSH_SEG(DS)
ROP_PUSH_SEG(ES)
ROP_PUSH_SEG(FS)
ROP_PUSH_SEG(GS)
ROP_PUSH_SEG(SS)

#define ROP_POP_SEG(seg, rseg)                                                                               \
    static uint32_t                                                                                          \
    ropPOP_##seg##_16(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block) \
    {                                                                                                        \
        STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);                                           \
        LOAD_STACK_TO_EA(0);                                                                                 \
        MEM_LOAD_ADDR_EA_W(&cpu_state.seg_ss);                                                               \
        LOAD_SEG(0, &rseg);                                                                                  \
        SP_MODIFY(2);                                                                                        \
                                                                                                             \
        return op_pc;                                                                                        \
    }                                                                                                        \
    static uint32_t                                                                                          \
    ropPOP_##seg##_32(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block) \
    {                                                                                                        \
        STORE_IMM_ADDR_L((uintptr_t) &cpu_state.oldpc, op_old_pc);                                           \
        LOAD_STACK_TO_EA(0);                                                                                 \
        MEM_LOAD_ADDR_EA_W(&cpu_state.seg_ss);                                                               \
        LOAD_SEG(0, &rseg);                                                                                  \
        SP_MODIFY(4);                                                                                        \
                                                                                                             \
        return op_pc;                                                                                        \
    }

ROP_POP_SEG(DS, cpu_state.seg_ds)
ROP_POP_SEG(ES, cpu_state.seg_es)
ROP_POP_SEG(FS, cpu_state.seg_fs)
ROP_POP_SEG(GS, cpu_state.seg_gs)
