ABS=absolute value
ADD=addition
AND=bitwise and
B=branch
CALL=function call
CLR=assign the value to 0
CMP=compare
CNT=count
EXP=exponent
MAC=multiply and accumulate
MAR=modify auxiliary register content
MAS=multiply and subtract
MAX=maximum
MIN=minimum
MOV=move data
MPY=multiply
NEG=negate (2s complement)
NOT=bitwise complement (1s complement)
OR=bitwise or
POP=pop from top of the stack
PSH=push to top of the stack
RET=return
ROL=rotate left
ROR=rotate right
RPT=repeat
SAT=saturate
SET=assign the value to 1
SFT=shift (left or right depending on sign of shift count)
SQA=square and add
SQR=square
SQS=square and subtract
SUB=subtraction
SWAP=swap register contents
TST=test bit
XOR=bitwise exclusive-or (xor)
XPA=expand
XTR=extract
