arch/powerpc/math-emu/fsubs.c

   1 #include <linux/types.h>
   2 #include <linux/errno.h>
   3 #include <asm/uaccess.h>
   4
   5 #include "soft-fp.h"
   6 #include "double.h"
   7 #include "single.h"
   8
   9 int
  10 fsubs(void *frD, void *frA, void *frB)
  11 {
  12         FP_DECL_D(A);
  13         FP_DECL_D(B);
  14         FP_DECL_D(R);
  15         int ret = 0;
  16
  17 #ifdef DEBUG
  18         printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
  19 #endif
  20
  21         __FP_UNPACK_D(A, frA);
  22         __FP_UNPACK_D(B, frB);
  23
  24 #ifdef DEBUG
  25         printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  26         printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  27 #endif
  28
  29         if (B_c != FP_CLS_NAN)
  30                 B_s ^= 1;
  31
  32         if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
  33                 ret |= EFLAG_VXISI;
  34
  35         FP_ADD_D(R, A, B);
  36
  37 #ifdef DEBUG
  38         printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  39 #endif
  40
  41         return (ret | __FP_PACK_DS(frD, R));
  42 }