SH7261 datasheet(79/1348 Pages) RENESAS

79 / 1348 page

Section 2 CPU

Rev. 2.00 Sep. 07, 2007 Page 47 of 1312

REJ09B0320-0200

The table below shows the format of instruction codes, operation, and execution states. They are

described by using this format according to their classification.

Instruction

Instruction Code

Operation

Execution

States

T Bit

Indicated by mnemonic.

Explanation of Symbols

Rm:

Source register

Rn:

Destination register

imm: Immediate data

disp: Displacement*

Indicated in MSB

↔

LSB order.

Explanation of Symbols

mmmm: Source register

nnnn: Destination register

0000: R0

0001: R1

.........

1111: R15

iiii:

Immediate data

dddd:

Displacement

Indicates summary of

operation.

Explanation of Symbols

→, ←: Transfer direction

(xx):

Memory operand

M/Q/T: Flag bits in SR

Logical AND of each bit

Logical OR of each bit

Exclusive logical OR of

each bit

Logical NOT of each bit

<<n: n-bit left shift

>>n: n-bit right shift

Value when no

wait states are

inserted.*

Value of T bit after

instruction is

executed.

Explanation of

Symbols

—: No change

Notes: 1. Instruction execution cycles: The execution cycles shown in the table are minimums. In

practice, the number of instruction execution states will be increased in cases such as

the following:

a. When there is a conflict between an instruction fetch and a data access

b. When the destination register of a load instruction (memory

→ register) is the same

as the register used by the next instruction.

2. Depending on the operand size, displacement is scaled by

×1, ×2, or ×4. For details,

refer to the SH-2A, SH2A-FPU Software Manual.

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