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APPENDIX
Note:
See Table B.5-1 and Table B.5-2 for information on (a) to (d) in the table.
Table B.8-6 11 Unsigned Multiplication/division Instructions (word, long word)
Mnemonic # RG B Operation L
H
A
H
ISTNZVCR
M
W
DIVU A 1 *1 0 0
word (AH) / byte (AL)
quotient --> byte (AL) remainder --> byte (AH)
-------**-
DIVU A,ear 2 *2 1 0
word (A) / byte (ear)
quotient --> byte (A) remainder --> byte (ear)
-------**-
DIVU A,eam 2+ *3 0 *6
word (A) / byte (eam)
quotient --> byte (A) remainder --> byte (eam)
-------**-
DIVUW A,ear 2 *4 1 0
long (A) / word (ear)
quotient --> word (A) remainder --> word (ear)
-------**-
DIVUW A,eam 2+ *5 0 *7
long (A) / word (eam)
quotient --> word (A) remainder --> word (eam)
-------**-
MULU A 1 *8 0 0 byte (AH) * byte (AL) --> word (A) ----------
MULU A,ear 2 *9 1 0 byte (A) * byte (ear) --> word (A) ----------
MULU A,eam 2+ *10 0 (b) byte (A) * byte (eam) --> word (A) ----------
MULUW A 1 *11 0 0 word (AH) * word (AL) --> Long (A) ----------
MULUW A,ear 2 *12 1 0 word (A) * word (ear) --> Long (A) ----------
MULUW A,eam 2+ *13 0 (c) word (A) * word (eam) --> Long (A) ----------
*1: 3: Division by 0 7: Overflow 15: Normal
*2: 4: Division by 0 8: Overflow 16: Normal
*3: 6+(a): Division by 0 9+(a): Overflow 19+(a): Normal
*4: 4: Division by 0 7: Overflow 22: Normal
*5: 6+(a): Division by 0 8+(a): Overflow 26+(a): Normal
*6: (b): Division by 0 or overflow 2 x (b): Normal
*7: (c): Division by 0 or overflow 2 x (c): Normal
*8: 3: Byte (AH) is 0. 7: Byte (AH) is not 0.
*9: 4: Byte (ear) is 0. 8: Byte (ear) is not 0.
*10: 5+(a): Byte (eam) is 0, 9+(a): Byte (eam) is not 0.
*11: 3: Word (AH) is 0. 11: Word (AH) is not 0.
*12: 4: Word (ear) is 0. 12: Word (ear) is not 0.
*13: 5+(a): Word (eam) is 0. 13+(a): Word (eam) is not 0.