Table 2-4 Arithmetic Operation Instructions (cont)
Instruction
Size
*
Function
DIVXU
B/W
Rd ÷ Rs
→
Rd
Performs unsigned division on data in two general registers: either
16 bits ÷ 8 bits
→
8-bit quotient and 8-bit remainder or 32 bits ÷ 16 bits
→
16-bit quotient and 16-bit remainder.
DIVXS
B/W
Rd ÷ Rs
→
Rd
Performs signed division on data in two general registers: either
16 bits ÷ 8 bits
→
8-bit quotient and 8-bit remainder, or 32 bits ÷ 16 bits
→
16-bit quotient and 16-bit remainder.
CMP
B/W/L
Rd – Rs, Rd – #IMM
Compares data in a general register with data in another general register or
with immediate data, and sets CCR according to the result.
NEG
B/W/L
0 – Rd
→
Rd
Takes the two’s complement (arithmetic complement) of data in a general
register.
EXTS
W/L
Rd (sign extension)
→
Rd
Extends byte data in the lower 8 bits of a 16-bit register to word data, or
extends word data in the lower 16 bits of a 32-bit register to longword data,
by extending the sign bit.
EXTU
W/L
Rd (zero extension)
→
Rd
Extends byte data in the lower 8 bits of a 16-bit register to word data, or
extends word data in the lower 16 bits of a 32-bit register to longword data,
by padding with zeros.
Note:
*
Size refers to the operand size.
B: Byte
W: Word
L:
Longword
31
www.DataSheet4U.com