arch/ppc/math-emu/fadd.c

   1 /* $Id: fadd.c,v 1.1 1999/08/23 18:59:22 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 fadd(void *frD, void *frA, void *frB)
  13 {
  14         FP_DECL_D(A);
  15         FP_DECL_D(B);
  16         FP_DECL_D(R);
  17         int ret = 0;
  18
  19 #ifdef DEBUG
  20         printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
  21 #endif
  22
  23         __FP_UNPACK_D(A, frA);
  24         __FP_UNPACK_D(B, frB);
  25
  26 #ifdef DEBUG
  27         printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  28         printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  29 #endif
  30
  31         if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
  32                 ret |= EFLAG_VXISI;
  33
  34         FP_ADD_D(R, A, B);
  35
  36 #ifdef DEBUG
  37         printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  38 #endif
  39
  40         return (ret | __FP_PACK_D(frD, R));
  41 }