i386/linux/linux-2.3.21/arch/ppc/math-emu/fsqrt.c

   1 /* $Id: fsqrt.c,v 1.1 1999/08/23 19:00:01 cort Exp $
   2  */
   3
   4 #include <linux/types.h>
   5 #include <linux/errno.h>
   6 #include <asm/uaccess.h>
   7
   8 #include "soft-fp.h"
   9 #include "double.h"
  10
  11 int
  12 fsqrt(void *frD, void *frB)
  13 {
  14         FP_DECL_D(B);
  15         FP_DECL_D(R);
  16         int ret = 0;
  17
  18 #ifdef DEBUG
  19         printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frB);
  20 #endif
  21
  22         __FP_UNPACK_D(B, frB);
  23
  24 #ifdef DEBUG
  25         printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  26 #endif
  27
  28         if (B_s && B_c != FP_CLS_ZERO)
  29                 ret |= EFLAG_VXSQRT;
  30         if (B_c == FP_CLS_NAN)
  31                 ret |= EFLAG_VXSNAN;
  32
  33         FP_SQRT_D(R, B);
  34
  35 #ifdef DEBUG
  36         printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  37 #endif
  38
  39         return (ret | __FP_PACK_D(frD, R));
  40 }