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fdiv.c

#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>

#include "soft-fp.h"
#include "double.h"

int
fdiv(void *frD, void *frA, void *frB)
{
      FP_DECL_D(A);
      FP_DECL_D(B);
      FP_DECL_D(R);
      int ret = 0;

#ifdef DEBUG
      printk("%s: %p %p %p\n", __func__, frD, frA, frB);
#endif

      __FP_UNPACK_D(A, frA);
      __FP_UNPACK_D(B, frB);

#ifdef DEBUG
      printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
      printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
#endif

      if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {
            ret |= EFLAG_VXZDZ;
#ifdef DEBUG
            printk("%s: FPSCR_VXZDZ raised\n", __func__);
#endif
      }
      if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
            ret |= EFLAG_VXIDI;
#ifdef DEBUG
            printk("%s: FPSCR_VXIDI raised\n", __func__);
#endif
      }

      if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
            ret |= EFLAG_DIVZERO;
            if (__FPU_TRAP_P(EFLAG_DIVZERO))
                  return ret;
      }
      FP_DIV_D(R, A, B);

#ifdef DEBUG
      printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
#endif

      return (ret | __FP_PACK_D(frD, R));
}

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