Subtracts the source operand from the destination data register and sets the condition codes according to the result. The data register is NOT changed.
----------------------------------------------------------------- |15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |---|---|---|---|-----------|-----------|-----------|-----------| | 1 | 0 | 1 | 1 | REGISTER | OP-MODE | MODE | REGISTER | ----------------------------------------========================= <ea> OP-MODE 000 8 bits operation. 001 16 bits operation. 010 32 bits operation. REGISTER The data register specifies destination Dn. <ea> specifies source operand, addressing modes allowed are: --------------------------------- ------------------------------- |Addressing Mode|Mode| Register | |Addressing Mode|Mode|Register| |-------------------------------| |-----------------------------| | Dn |000 |No reg. Dn| | (Abs).W |111 | 000 | |-------------------------------| |-----------------------------| | An * |001 |No reg. An| | (Abs).L |111 | 001 | |-------------------------------| |-----------------------------| | (An) |010 |No reg. An| | (d16,PC) |111 | 010 | |-------------------------------| |-----------------------------| | (An)+ |011 |No reg. An| | (d8,PC,Xi) |111 | 011 | |-------------------------------| |-----------------------------| | -(An) |100 |No reg. 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 |111 | 100 | |-------------------------------| ------------------------------- |([bd,An,Xi],od)|110 |No reg. An| |-------------------------------| |([bd,An],Xi,od)|110 |No reg. An| --------------------------------- * Word and Long only.
X - Not affected N - Set if the result is negative. Cleared otherwise. Z - Set if the result is zero. Cleared otherwise. V - Set if an overflow occours. Cleared otherwise. C - Set if a borrow occours. Cleared otherwise.