Как се вмъкват асемблерски инструкции в C код под GCC?

Трябва да нахакам едни микрозакъснения, т.е. за няколко NOP-a иде реч.

А пуста документация на GCC....

inline static __swi __arm void tsk_send_signal(volatile Task * task, unsigned int signal)
{
volatile register Task *_task asm("r0") = task;
volatile register unsigned int _signal asm("r1") = signal;

asm volatile ("swi %2"
: "=r" (_task), "=r"(_signal)
: "I" (usr_send_signal_swi), "0" (_task), "1"(_signal)
: "r2", "r3", "r12");
}

static unsigned int get_clocks_per200ms(void)
{
unsigned int res;

asm volatile (
"1: \n\t"
" mov %0, #0 \n\t"
" mov r1, r8 \n\t" //REG_MTASK
" mov r2, #200 \n\t"
" ldr r3, [r1, %1] \n\t"
"2: \n\t"
" add %0, %0, #8 \n\t"
" ldr r4, [r1, %1] \n\t"
" cmp r3, r4 \n\t"
" beq 2b \n\t"
" bhi 1b \n\t"

" add r3, r3, #1 \n\t"
" sub r2, r2, #1 \n\t"
" bne 2b \n\t"

: "=r"(res)
: "I" (tsk_time)
: "r1", "r2", "r3", "r4"
);
return res;
}