SH7021 datasheet(55/509 Pages) RENESAS

номер детали	SH7021

подробное описание детали	SuperH??RISC engine

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34 RENESAS

Table 2.13

Arithmetic Instructions (cont)

Instruction

Instruction Code

Operation

Execution

Cycles

T bit

EXTS.W

Rm,Rn

0110nnnnmmmm1111

A word in Rm is sign-

extended

→ Rn

—

EXTU.B

Rm,Rn

0110nnnnmmmm1100

A byte in Rm is zero-

extended

→ Rn

—

EXTU.W

Rm,Rn

0110nnnnmmmm1101

A word in Rm is zero-

extended

→ Rn

—

MAC.W

@Rm+,@Rn+

0100nnnnmmmm1111

Signed operation of

(Rn)

× (Rm) + MAC

→ MAC

3/(2)*

—

MULS

Rm,Rn

0010nnnnmmmm1111

Signed operation of

× Rm → MAC

1–3*

—

MULU

Rm,Rn

0010nnnnmmmm1110

Unsigned operation

of Rn

× Rm → MAC

1–3*

—

NEG

Rm,Rn

0110nnnnmmmm1011

0–Rm

→ Rn

—

NEGC

Rm,Rn

0110nnnnmmmm1010

0–Rm–T

→ Rn,

Borrow

→ T

Borrow

SUB

Rm,Rn

0011nnnnmmmm1000

Rn–Rm

→ Rn

—

SUBC

Rm,Rn

0011nnnnmmmm1010

Rn–Rm–T

→ Rn,

Borrow

→ T

Borrow

SUBV

Rm,Rn

0011nnnnmmmm1011

Rn–Rm

→ Rn,

Underflow

→ T

Underflow

Note:

The normal minimum number of execution cycles (The number in parenthesis in the

number of cycles when there is contension with preceding/following instructions).

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