SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 110

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

11.12.9
11.12.9.1
11.12.9.2
11.12.9.3
11.12.9.4
110
110
CLREX
SAM3X/A
SAM3X/A
CLREX
Syntax
Operation
Condition flags
Examples
Clear Exclusive.
where:
cond
Use CLREX to make the next STREX, STREXB, or STREXH instruction write 1 to its destination
register and fail to perform the store. It is useful in exception handler code to force the failure of
the store exclusive if the exception occurs between a load exclusive instruction and the match-
ing store exclusive instruction in a synchronization operation.
See
These instructions do not change the flags.
CLREX{cond}
“Synchronization primitives” on page 74
is an optional condition code, see
for more information.
“Conditional execution” on page
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
96.