75. Load Effective Address

75.1. Name

LEA -- Load effective address

75.2. Synopsis

        LEA        <ea>,An

        Size = (Long)

75.3. Function

Places the specified address into the destination address register. Note: All 32 bits of An are affected by this instruction.

75.4. Format

        -----------------------------------------------------------------
        |15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
        |---|---|---|---|-----------|---|---|---|-----------|-----------|
        | 0 | 1 | 0 | 0 | REGISTER  | 1 | 1 | 1 |    MODE   | REGISTER  |
        ----------------------------------------=========================
                                                           <ea>
REGISTER
        "REGISTER" indicates the number of address register

        <ea> specifies address which must be loaded in the address register.
        Allowed addressing modes are:

        --------------------------------- -------------------------------
        |Addressing Mode|Mode| Register | |Addressing Mode|Mode|Register|
        |-------------------------------| |-----------------------------|
        |      Dn       | -  |    -     | |   (Abs).W     |111 |  000   |
        |-------------------------------| |-----------------------------|
        |      An       | -  |    -     | |   (Abs).L     |111 |  001   |
        |-------------------------------| |-----------------------------|
        |     (An)      |010 |No reg. An| |   (d16,PC)    |111 |  010   |
        |-------------------------------| |-----------------------------|
        |     (An)+     | -  |    -     | |   (d8,PC,Xi)  |111 |  011   |
        |-------------------------------| |-----------------------------|
        |    -(An)      | -  |    -     | |   (bd,PC,Xi)  |111 |  011   |
        |-------------------------------| |-----------------------------|
        |    (d16,An)   |101 |No reg. An| |([bd,PC,Xi],od)|111 |  011   |
        |-------------------------------| |-----------------------------|
        |   (d8,An,Xi)  |110 |No reg. An| |([bd,PC],Xi,od)|111 |  011   |
        |-------------------------------| |-----------------------------|
        |   (bd,An,Xi)  |110 |No reg. An| |    #data      | -  |   -    |
        |-------------------------------| -------------------------------
        |([bd,An,Xi],od)|110 |No reg. An|
        |-------------------------------|
        |([bd,An],Xi,od)|110 |No reg. An|
        ---------------------------------

75.5. Result

        None.

75.6. See also

MOVEA ADDA SUBA