SAM3S8B Atmel Corporation, SAM3S8B Datasheet - Page 102

• Manufacturer Part Number: SAM3S8B
• Manufacturer: Atmel Corporation

10.11.9
10.11.9.1
10.11.9.2
10.11.9.3
10.11.9.4
102
102
CLREX
SAM3S8/SD8
SAM3S8/SD8
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 61
is an optional condition code, see
for more information.
“Conditional execution” on page
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
84.