Rev. 1.00, 09/03, page 34 of 704
Table 2.4
Arithmetic Operations Instructions (1)
Instruction Size
*
Function
ADD
SUB
B/W/L
Rd ± Rs
→
Rd, Rd ± #IMM
→
Rd
Performs addition or subtraction on data in two general registers, or on
immediate data and data in a general register. (Immediate byte data cannot
be subtracted from byte data in a general register. Use the SUBX or ADD
instruction.)
ADDX
SUBX
B
Rd ± Rs ± C
→
Rd, Rd ± #IMM ± C
→
Rd
Performs addition or subtraction with carry or borrow on byte data in two
general registers, or on immediate data and data in a general register.
INC
DEC
B/W/L
Rd ± 1
→
Rd, Rd ± 2
→
Rd
Increments or decrements a general register by 1 or 2. (Byte operands can
be incremented or decremented by 1 only)
ADDS
SUBS
L
Rd ± 1
→
Rd, Rd ± 2
→
Rd, Rd ± 4
→
Rd
Adds or subtracts the value 1, 2, or 4 to or from data in a 32-bit register.
DAA
DAS
B
Rd (decimal adjust)
→
Rd
Decimal-adjusts an addition or subtraction result in a general register by
referring to the CCR to produce 4-bit BCD data.
MULXU B/W
Rd
×
Rs
→
Rd
Performs unsigned multiplication on data in two general registers.
Either 8 bits
×
8 bits
→
16 bits or 16 bits
×
16 bits
→
32 bits.
MULXS B/W
Rd
×
Rs
→
Rd
Performs signed multiplication on data in two general registers.
Either 8 bits
×
8 bits
→
16 bits or 16 bits
×
16 bits
→
32 bits.
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.
Note: Size refers to the operand size.
B:
Byte
W:
Word
L:
Longword
Summary of Contents for H8S/2437
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