SAM3N00A Atmel Corporation, SAM3N00A Datasheet - Page 102

• Manufacturer Part Number: SAM3N00A
• Manufacturer: Atmel Corporation

10.12.9
10.12.9.1
10.12.9.2
10.12.9.3
10.12.9.4
102
CLREX
SAM3N
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
11011A–ATARM–04-Oct-10
84.