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INSTRUCTION DESCRIPTIONS

MOTOROLA INSTRUCTION SET DETAILS A - 199

Example:

CMP Y0,B A,L:$1234 ;compare Y0 and B, save 48-bit A1:A0 value

Explanation of Example: Prior to execution, the 56-bit A accumulator contains the

value $01:234567:89ABCD, the 24-bit X memory location X:$1234 contains the value

$000000, and the 24-bit Y memory location Y:$1234 contains the value $000000. The

execution of the parallel move portion of the instruction, A,L:$1234, moves the 48-bit lim-

ited positive saturation constant $7FFFFF:FFFFFF into the specified long memory loca-

tion by moving the MS 24 bits of the 48-bit limited positive saturation constant ($7FFFFF)

into the 24-bit X memory location X:$1234 and by moving the LS 24 bits of the 48-bit lim-

ited positive saturation constant ($FFFFFF) into the 24-bit Y memory location Y:$1234

since the signed integer portion of the A accumulator was in use.

Condition Codes:

S — Computed according to the definition in A.5 CONDITION CODE COMPUTATION

L — Set if data limiting has occurred during parallel move.

Note: The MOVE A,L:ea operation will result in a 48-bit positive or negative saturation

constant being stored in the specified 24-bit X and Y memory locations if the signed inte-

ger portion of the A accumulator is in use. The MOVE AB,L:ea operation will result in

either one or two 24-bit positive and/or negative saturation constant(s) being stored in the

specified 24-bit X and/or Y memory location(s) if the signed integer portion of the A and/

or B accumulator(s) is in use.

L: Long Memory Data Move L:

Before Execution After Execution

$01:234567:89ABCD

X:$1234 X:$1234

$000000 $7FFFFF

$01:234567:89ABCD

Y:$1234

$:000000 $FFFFFF

Y:$1234

MR CCR

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

LF DM T

S1 S0 I1 I0 SLEU NZ VC