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Compiler-specific Features
The __strex intrinsic does not support access to doubleword data. The compiler
generates an error if you specify an access width that is not supported.
Example
int foo(void)
{
int loc=0xff;
return(!__strex(0x20, (volatile char *)loc));
}
Compiling this code with the command-line option --cpu=6k produces
||foo|| PROC
MOV
MOV
STREXB
RSBS
MOVCC
BX
ENDP
r0,#0xff
r2,#0x20
r1,r2,[r0]
r0,r1,#1
r0,#0
lr
See also
• __ldrex on page 4-84
• __ldrexd on page 4-86
• __strexd
• LDREX and STREX on page 4-36 in the Assembler Guide.
4.7.37 __strexd
This intrinsic inserts an STREXD instruction into the instruction stream generated by the
compiler. It enables you to use an STREXD instruction in your C or C++ code to store data
to memory. It supports exclusive stores of doubleword data to memory.
Syntax
int __strexd(unsigned long long val, volatile void *ptr)
Where:
val
is the value to be written to memory.
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