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Square Value and Accumulate Previous Product
SQRA
7-169
Assembly Language Instructions
Cycles for a Repeat (RPT) Execution of an SQRA Instruction
Program
Operand
ROM
DARAM SARAM External
DARAM n n n n+p
SARAM n n n, n+1
†
n+p
External n+nd n+nd n+nd n+1+p+nd
†
If the operand and the code are in the same SARAM block
Example 1 SQRA DAT30 ;(DP = 6: addresses 0300h–037Fh,
;PM = 0: no shift of product)
Before Instruction After Instruction
Data Memory Data Memory
31Eh 0Fh 31Eh 0Fh
TREG 3h TREG 0Fh
PREG 12Ch PREG 0E1h
ACC X 1F4h ACC 0 320h
CC
Example 2 SQRA *,AR4 ;(PM = 0)
Before Instruction After Instruction
ARP 3 ARP 4
AR3 31Eh AR3 31Eh
Data Memory Data Memory
31Eh 0Fh 31Eh 0Fh
TREG 3h TREG 0Fh
PREG 12Ch PREG 0E1h
ACC X 1F4h ACC 0 320h
CC