4ce8d61a5c
Experimentation reveals that gcc ignores -mrtd for the implicit arithmetic functions (e.g. __udivdi3), but not for the implicit memcpy() and memset() functions. Mark the implicit arithmetic functions with __attribute__((cdecl)) to compensate for this. (Note: we cannot mark with with __cdecl, because we define __cdecl to incorporate regparm(0) as well.)
33 lines
585 B
C
33 lines
585 B
C
#include "libgcc.h"
|
|
|
|
LIBGCC uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t *rem_p)
|
|
{
|
|
uint64_t quot = 0, qbit = 1;
|
|
|
|
if ( den == 0 ) {
|
|
return 1/((unsigned)den); /* Intentional divide by zero, without
|
|
triggering a compiler warning which
|
|
would abort the build */
|
|
}
|
|
|
|
/* Left-justify denominator and count shift */
|
|
while ( (int64_t)den >= 0 ) {
|
|
den <<= 1;
|
|
qbit <<= 1;
|
|
}
|
|
|
|
while ( qbit ) {
|
|
if ( den <= num ) {
|
|
num -= den;
|
|
quot += qbit;
|
|
}
|
|
den >>= 1;
|
|
qbit >>= 1;
|
|
}
|
|
|
|
if ( rem_p )
|
|
*rem_p = num;
|
|
|
|
return quot;
|
|
}
|