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Section 2 CPU
Table 2.4
Arithmetic Operations Instructions (2)
Instruction
Size*
DIVXS
B/W
CMP
B/W/L
NEG
B/W/L
EXTU
W/L
EXTS
W/L
2
TAS*
B
Note:
1. Refers to the operand size.
B:
Byte
W: Word
L:
Longword
2. Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction.
Rev. 1.00 May 09, 2008 Page 46 of 954
REJ09B0462-0100
1
Function
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.
Rd – Rs, Rd – #IMM
Compares data in a general register with data in another general
register or with immediate data, and sets CCR bits according to the
result.
0 – Rd → Rd
Takes the two's complement (arithmetic complement) of data in a
general register.
Rd (zero extension) → Rd
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by padding with zeros on the
left.
Rd (sign extension) → Rd
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by extending the sign bit.
@ERd – 0, 1 → (<bit 7> of @ERd)
Tests memory contents, and sets the most significant bit (bit 7) to 1.
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