arch/ppc/math-emu/fdivs.c

   1 /* $Id: fdivs.c,v 1.1 1999/08/23 18:59:35 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 #include "single.h"
  11
  12 int
  13 fdivs(void *frD, void *frA, void *frB)
  14 {
  15         FP_DECL_D(A);
  16         FP_DECL_D(B);
  17         FP_DECL_D(R);
  18         int ret = 0;
  19
  20 #ifdef DEBUG
  21         printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
  22 #endif
  23
  24         __FP_UNPACK_D(A, frA);
  25         __FP_UNPACK_D(B, frB);
  26
  27 #ifdef DEBUG
  28         printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  29         printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  30 #endif
  31
  32         if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {
  33                 ret |= EFLAG_VXZDZ;
  34 #ifdef DEBUG
  35                 printk("%s: FPSCR_VXZDZ raised\n", __FUNCTION__);
  36 #endif
  37         }
  38         if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
  39                 ret |= EFLAG_VXIDI;
  40 #ifdef DEBUG
  41                 printk("%s: FPSCR_VXIDI raised\n", __FUNCTION__);
  42 #endif
  43         }
  44
  45         if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
  46                 ret |= EFLAG_DIVZERO;
  47                 if (__FPU_TRAP_P(EFLAG_DIVZERO))
  48                         return ret;
  49         }
  50
  51         FP_DIV_D(R, A, B);
  52
  53 #ifdef DEBUG
  54         printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  55 #endif
  56
  57         return (ret | __FP_PACK_DS(frD, R));
  58 }