BISPSW and BICPSW Instruction

Purpose:

To set or clear trap enables

Format:

opcode mask.rw

Operation:

BISPSW PSW <- PSW OR mask;
BICPSW PSW <- PSW AND NOT mask;

Condition
Codes:

BISPSW: N <- N OR mask<3>
Z <- Z OR mask<2>
V <- V OR mask<1>
C <- C OR mask<0>
BICPSW: N <- N AND NOT mask<3>
Z <- Z AND NOT mask<2>
V <- V AND NOT mask<1>
C <- C AND NOT mask<0>

Exceptions:

Reserved Operand

Opcodes:

B8	BISPSW	Bit Set PSW
B9	BICPSW	Bit Clear PSW

Description:

On BISPSW, the PSW is ORed with the 16 bit mask operand and the PSW is replaced by the result.

On BICPSW, the PSW is ANDed with the ones complement of the 16 bit mask operand and the PSW is replaced by the result.

Notes:

A reserved operand fault occurs if the mask bit 15:8 are not zero. On a reserved operand fault, the PSW is not affected.