r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 145

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

(10) Slot Illegal Instruction Exception
• Sources:
• Transition address: VBR + H'000 0100
• Transition operations:
Slot_illegal_instruction_exception()
{
}
⎯ Decoding of an undefined instruction in a delay slot
⎯ Decoding of an instruction that modifies PC in a delay slot
⎯ Decoding in user mode of a privileged instruction in a delay slot
⎯ Decoding of a PC-relative MOV instruction or MOVA instruction in a delay slot
⎯ The BRDSSLP bit in EXPMASK is 0, and the SLEEP instruction in the delay slot is
⎯ The RTEDS bit in EXPMASK is 0, and an instruction other than the NOP instruction in the
The PC contents for the preceding delayed branch instruction are saved in SPC. The SR and
R15 contents when this exception occurred are saved in SSR and SGR.
Exception code H'1A0 is set in EXPEVT. The BL, MD, and RB bits are set to 1 in SR, and a
branch is made to PC = VBR + H'0100. Operation is not guaranteed if an undefined code other
than H'FFFD is decoded.
SPC = PC - 2;
SSR = SR;
SGR = R15;
EXPEVT = H'0000 01A0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + H'0000 0100;
Delayed branch instructions: JMP, JSR, BRA, BRAF, BSR, BSRF, RTS, RTE, BT/S, BF/S
Undefined instruction: H'FFFD
Instructions that modify PC: JMP, JSR, BRA, BRAF, BSR, BSRF, RTS, RTE, BT, BF,
BT/S, BF/S, TRAPA, LDC Rm,SR, LDC.L @Rm+,SR, ICBI, PREFI
Privileged instructions: LDC, STC, RTE, LDTLB, SLEEP, but excluding LDC/STC
instructions that access GBR
executed.
delay slot is executed.
Rev.1.00 Jan. 10, 2008 Page 115 of 1658
5. Exception Handling
REJ09B0261-0100