linux/arch/ppc/math-emu/fsqrt.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

38 lines
632 B
C

#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
#include "soft-fp.h"
#include "double.h"
int
fsqrt(void *frD, void *frB)
{
FP_DECL_D(B);
FP_DECL_D(R);
int ret = 0;
#ifdef DEBUG
printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frB);
#endif
__FP_UNPACK_D(B, frB);
#ifdef DEBUG
printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
#endif
if (B_s && B_c != FP_CLS_ZERO)
ret |= EFLAG_VXSQRT;
if (B_c == FP_CLS_NAN)
ret |= EFLAG_VXSNAN;
FP_SQRT_D(R, B);
#ifdef DEBUG
printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
#endif
return (ret | __FP_PACK_D(frD, R));
}