25 lines
330 B
C
25 lines
330 B
C
|
/*
|
||
|
|
* Written by J.T. Conklin, Apr 28, 1995
|
||
|
|
* Public domain.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <ieeefp.h>
|
||
|
|
|
||
|
|
fp_rnd
|
||
|
|
fpsetround(rnd_dir)
|
||
|
|
fp_rnd rnd_dir;
|
||
|
|
{
|
||
|
|
fp_rnd old;
|
||
|
|
fp_rnd new;
|
||
|
|
|
||
|
|
__asm__("sfsr %0" : "=r" (old));
|
||
|
|
|
||
|
|
new = old;
|
||
|
|
new &= ~(0x03 << 7);
|
||
|
|
new |= ((rnd_dir & 0x03) << 7);
|
||
|
|
|
||
|
|
__asm__("lfsr %0" : : "r" (new));
|
||
|
|
|
||
|
|
return (old >> 7) & 0x03;
|
||
|
|
}
|