SH7261 datasheet(143/1348 Pages) RENESAS

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Section 5 Exception Handling

Rev. 2.00 Sep. 07, 2007 Page 111 of 1312

REJ09B0320-0200

5.7

Exceptions Triggered by Instructions

5.7.1

Types of Exceptions Triggered by Instructions

Exception handling can be triggered by trap instructions, general illegal instructions, slot illegal

instructions, and integer division exceptions, as shown in table 5.10.

Table 5.10

Types of Exceptions Triggered by Instructions

Type

Source Instruction

Comment

Trap instruction

TRAPA

Slot illegal

instructions

Undefined code placed

immediately after a delayed

branch instruction (delay slot),

instructions that rewrite the PC,

32-bit instructions, RESBANK

instruction, DIVS instruction, and

DIVU instruction

Delayed branch instructions: JMP, JSR,

BRA, BSR, RTS, RTE, BF/S, BT/S, BSRF,

BRAF

Instructions that rewrite the PC: JMP, JSR,

BRA, BSR, RTS, RTE, BT, BF, TRAPA,

BF/S, BT/S, BSRF, BRAF, JSR/N, RTV/N

32-bit instructions: BAND.B, BANDNOT.B,

BCLR.B, BLD.B, BLDNOT.B, BOR.B,

BORNOT.B, BSET.B, BST.B, BXOR.B,

MOV.B@disp12, MOV.W@disp12,

MOV.L@disp12, MOVI20, MOVI20S,

MOVU.B, MOVU.W.

General illegal

instructions

Undefined code anywhere

besides in a delay slot

Division by zero

DIVU, DIVS

Integer division

exceptions

Negative maximum value

÷ (−1)

DIVS

Floating-point

operation

instruction

Instructions that cause disabled

operation exception defined by

IEEE754 standard or division

exception by zero. Instructions

that could cause overflow,

underflow, or imprecise

exception.

FADD, FSUB, FMUL, FDIV, FMAC,

FCMP/EQ, FCMP/GT, FLOAT, FTRC,

FCNVDS, FCNVSD, FSQRT

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