HCS12 datasheet(64/452 Pages) FREESCALE

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S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

5.12 Multiplication and Division Instructions

There are instructions for signed and unsigned 8- and 16-bit multiplication.

Eight-bit multiplication operations have a 16-bit product. Sixteen-bit

multiplication operations have 32-bit products.

Integer and fractional division instructions have 16-bit dividend, divisor,

quotient, and remainder. Extended division instructions use a 32-bit

dividend and a 16-bit divisor to produce a 16-bit quotient and a 16-bit

remainder.

Table 5-10 is a summary of multiplication and division instructions.

Table 5-10. Multiplication and Division Instructions

Mnemonic

Function

Operation

Multiplication Instructions

EMUL

16 by 16 multiply (unsigned)

(D)

× (Y) ⇒ Y : D

EMULS

16 by 16 multiply (signed)

(D)

× (Y) ⇒ Y : D

MUL

8 by 8 multiply (unsigned)

(A)

× (B) ⇒ A : B

Division Instructions

EDIV

32 by 16 divide (unsigned)

: D) ÷ (X) ⇒ Y

Remainder

⇒ D

EDIVS

32 by 16 divide (signed)

: D) ÷ (X) ⇒ Y

Remainder

⇒ D

FDIV

16 by 16 fractional divide

(D)

÷ (X) ⇒ X

Remainder

⇒ D

IDIV

16 by 16 integer divide (unsigned)

(D)

÷ (X) ⇒ X

Remainder

⇒ D

IDIVS

16 by 16 integer divide (signed)

(D)

÷ (X) ⇒ X

Remainder

⇒ D

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