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Compiler-specific Features
Where:
val
ptr
Is the value to be written to memory.
Points to the address of the data to be written to in memory. To specify
the size of the data to be written, cast the parameter to an appropriate
integral type.
Table 4-13 Access widths supported by the __strt intrinsic
Instruction Size of data loaded C cast
STRBT unsigned byte (char *)
STRHT unsigned halfword (short int *)
STRT word (int *)
Errors
The compiler does not recognize the __strt intrinsic when compiling for a target that
does not support the STRT instruction. The compiler generates either a warning or an
error in this case.
The __strt intrinsic does not support access either to signed data or to doubleword data.
The compiler generates an error if you specify an access width that is not supported.
Example
void foo(void)
{
int loc=0xff;
__strt(0x20, (volatile char *)loc);
}
Compiling this code produces:
||foo|| PROC
MOV
MOV
STRBT
BX
ENDP
r0,#0xff
r1,#0x20
r1,[r0],#0
lr
See also
• --thumb on page 2-122
• LDR and STR (User mode) on page 4-18 in the Assembler Guide.
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