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Section 9 Exception Handling
Rev. 4.00 Sep. 14, 2005 Page 213 of 982
REJ09B0023-0400
Table 9.4 SPC Value When a Re-Execution Type Exception Occurs in Repeat Control
Number of Instructions in a Repeat Loop Instruction Where an
Exception Occurs
1 2 3 4 or Greater
RptDtct RptDtct RptDtct RptDtct RptDtct
RptDtct1 RptDtct1 RptDtct1 RptDtct1 RptDtct1
RptDtct2 RptDtct1 RptDtct1 RS-4
RptDtct3 RptDtct1 RS-2
Note: The following labels are used here.
RptDtct: Repeat detection instruction address
RptDtct1: An instruction address one instruction following the repeat detection instruction
RptDtct2: An instruction address two instruction following the repeat detection instruction
RptDtct3: An instruction address three instruction following the repeat detection instruction
RS: Repeat start instruction address
If a re-execution type exception is accepted at an instruction in the hatched areas above, a
return address to be saved in the SPC is incorrect. If SR.RC[11:0] is 1 or 0, a correct return
address is saved in the SPC.
Illegal Instruction Exception in Repeat Control Period: If one of the following instructions is
executed at the address following RptDtct1, a general illegal instruction exception occurs. For
details on an address to be saved in the SPC, refer to SPC Saved by an Exception in Repeat
Control Period description in section 9.4.2, Exception in Repeat Control Period.
• Branch instructions
BRA, BSR, BT, BF, BT/S, BF/S, BSRF, RTS, BRAF, RTE, JSR, JMP, TRAPA
• Repeat control instructions
SETRC, LDRS, LDRE
• Load instructions for SR, RS, and RE
LDC Rn,SR, LDC @Rn+,SR, LDC Rn,RE, LDC @Rn+,RE, LDC Rn,RS, LDC @Rn+, Rs
Note: In a repeat loop consisting of one to three instructions, some restrictions apply to repeat
detection instructions and all the remaining instructions. In a repeat loop consisting of four
or more instructions, restrictions apply to only the three instructions that include a repeat
end instruction.