Technical information

Operating Precautions for CPDW9X/NT-CDR-V85X, Y-GHS-MULTI-V800
TM
Customer Notification r20tu0003ed1812 79
No. a69
Out-Of-Order Code Generation
Version Information
V3.5.1,V4.0.5, V4.0.7, V4.0.7A
Details:
The usage of an assembler macro within a preprocessor defintion decaolaring a new block may
result in out-of-order code generation, if used within a function and the structure packing feature
is used.
Example:
asm int IRQ_suspend(void) {
stsr PSW, r10
di
}
asm void IRQ_restore (int oldPSW) {
%reg oldPSW
ldsr oldPSW, PSW
%error
}
#define ABS \
{ // new block decalred here \
int psw = IRQ_suspend(); // psw is locally available only!
#define ABE \
IRQ_restore(__psw); \
} // new block ends here
void foo( void)
{
ABS
...
foosub();
...
ABE
...
}
It is most likely that with –pack=1 the block end substitution code is executed directly after the
block started.
Command Line
ccv850 –pack=1 test.c
Workaround
1. Use latest compiler release 4.2.3