unsigned int __ldrt(const volatile void *ptr)

where:

The __ldrt intrinsic returns the data loaded from the memory address pointed to by ptr.

The compiler does not recognize the __ldrt intrinsic when compiling for a target that does not support the LDRT instruction. The compiler generates either a warning or an error in this case.

The __ldrt intrinsic does not support access to doubleword data. The compiler generates an error if you specify an access width that is not supported.

int foo(void)
{
    int loc = 0xff;
    return __ldrt((const volatile int *)loc);
}

Compiling this code with the default options produces:

||foo|| PROC
    MOV      r0,#0xff
    LDRBT    r1,[r0],#0
    MOV      r2,#0x100
    LDRBT    r0,[r2],#0
    ORR      r0,r1,r0,LSL #8
    BX       lr
    ENDP