Integer comparison: Difference between revisions
→{{header|68000 Assembly}}
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Done: PLA ;restore Accumulator from stack
RTS ;return from subroutine</lang>
=={{header|68000 Assembly}}==
The task of getting input from the user is much more difficult in assembly since it hasn't been done for you unlike nearly all other languages. So that part will be omitted to focus on the actual comparison.
In assembly, the only difference between a signed integer and an unsigned integer is the comparator(s) used to evaluate it. Therefore we have two different versions of this task.
===Unsigned Comparison===
<lang 68000devpac>Compare:
;integers to compare are in D0 and D1
CMP.L D1,D0
BCS .less ;D1 < D0
;else, carry clear, which implies greater than or equal to.
BNE .greater ;D1 > D0
;else, d1 = d0
LEA Equal,A0
JMP PrintString ;and use its RTS to return
.greater:
LEA GreaterThan,A0
JMP PrintString ;and use its RTS to return
.less:
LEA LessThan,A0
JMP PrintString ;and use its RTS to return
LessThan:
dc.b "second integer less than first",0
even
GreaterThan:
dc.b "second integer greater than first",0
even
Equal:
dc.b "both are equal",0
even</lang>
===Signed Comparison===
<lang 68000devpac>Compare:
;integers to compare are in D0 and D1
CMP.L D1,D0
BLT .less ;D1 < D0
;else, carry clear, which implies greater than or equal to.
BNE .greater ;D1 > D0
;else, d1 = d0
LEA Equal,A0
JMP PrintString ;and use its RTS to return
.greater:
LEA GreaterThan,A0
JMP PrintString ;and use its RTS to return
.less:
LEA LessThan,A0
JMP PrintString ;and use its RTS to return
LessThan:
dc.b "second integer less than first",0
even
GreaterThan:
dc.b "second integer greater than first",0
even
Equal:
dc.b "both are equal",0
even</lang>
=={{header|8051 Assembly}}==
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