Error: registers may not be the same -- `strexb r3,r2,[r3]'

tmp\ccFziEge.s:914: Error: registers may not be the same -- `strexb r3,r2,[r3]'
tmp\ccFziEge.s:968: Error: registers may not be the same -- `strexh r3,r2,[r3]'

 

/**
* @brief STR Exclusive (8 bit)
*
* @param value value to store
* @param *addr address pointer
* @return successful / failed
*
* Exclusive STR command for 8 bit values
*/
uint32_t __STREXB(uint8_t value, uint8_t *addr)
{
uint32_t result=0;

__ASM volatile ("strexb %0, %2, [%1]" : "=&r" (result) : "r" (addr), "r" (value) );
return(result);
}

/**
* @brief STR Exclusive (16 bit)
*
* @param value value to store
* @param *addr address pointer
* @return successful / failed
*
* Exclusive STR command for 16 bit values
*/
uint32_t __STREXH(uint16_t value, uint16_t *addr)
{
uint32_t result=0;

__ASM volatile ("strexh %0, %2, [%1]" : "=&r" (result) : "r" (addr), "r" (value) );
return(result);
}