19 lines
322 B
C
19 lines
322 B
C
#if defined(__GNUC__) && (__GNUC__ >= 5)
|
|
|
|
#include "uint16.h"
|
|
|
|
int umult16(uint16 a,uint16 b,uint16* c) { return !__builtin_mul_overflow(a,b,c); }
|
|
|
|
#else
|
|
|
|
#include "safemult.h"
|
|
|
|
int umult16(uint16 a,uint16 b,uint16* c) {
|
|
unsigned long x=(unsigned long)a*b;
|
|
if (x>0xffff) return 0;
|
|
*c=x&0xffff;
|
|
return 1;
|
|
}
|
|
|
|
#endif
|