hello...i'm abhilash..i've typed a code to add 2 64bit numbers.the code iis not successfully compiled..errors are not shown in the .c file but in a .s file whose location cant be traced out. my code is given below... ........................................................ #include<stdio.h> unsigned long value1[2]={0x12a2e670,0xa2435649}; unsigned long value2[2]={0x12a2e670,0xa2435649}; unsigned long result[2]; unsigned long *a=&value1; unsigned long *b=&value2; unsigned long *c=&result; main() { asm("ldr r0,%[v]\n\t" "ldr r1,[r0]\n\t" "ldr r2,[r0,#4]\n\t" ::[v] "r" (a)); asm volatile( "ldr r0,%0\n\t" "ldr r3,[r0]\n\t" "ldr r4,[r0,#4]\n\t" ::"r" (b):"memory"); asm volatile( "adds r6,r2,r4\n\t" "adc r5,r1,r3\n\t" "ldr r0,%0\n\t" "str r5,[r0]\n\t" "str r6,[r0,#4]\n\t" ::"r" (c):"memory"); asm volatile("mrs r7,cpsr\n\t" "swi &11"); } ......................................................... after this i did "gcc filename" and errors came...please help me sort the issue... Abhilash