Encoding:

Format:

MTLHX rs

Purpose:

Move to Lo, Hi, and Extended Carry

Set extended Hi/Lo state.

Description:

ACX = HI; HI = LO; LO = GPR[rs] ;

The value special register HI is written to the extended accumulator bits ACX. The value in special register LO is then written to special register HI, and the value in GPR rs is written to special register LO. This is the reverse of the operation of the MFLHXU instruction.

• The number of ACX extended accumulator bits is implementation-dependent, ranging from 8 to 64 bits. If the HI register contains more signiicant bits than the number of implemented ACX bits, that information is discarded without raising an exception.

• If 64-bit operations are not enabled, at most the least-signiicant 32 bits of HI will be copied to ACX.

Restrictions:

None

Operation:

newLO = GPR[rs]
newHI = LO
ACX = HIACXMSB..0
HI = newHI
LO = newLO

Exceptions:

None