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Type
Instruction
Arithmetic
MULXU
operations
MULXS
DIVXU
DIVXS
CMP
NEG
EXTU
EXTS
TAS*
MAC
1
Size*
B/W
B/W
B/W
B/W
B/W/L
B/W/L
W/L
W/L
2
B
—
Function
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.
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.
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.
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.
(EAs) × (EAd) + MAC → MAC
Performs signed multiplication on memory contents and
adds the result to the multiply-accumulate register. The
following operations can be performed:
16 bits × 16 bits + 32 bits → 32 bits, saturating
16 bits × 16 bits + 42 bits → 42 bits, non-saturating
43
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