linux/arch/powerpc/math-emu/fdivs.c
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   1#include <linux/types.h>
   2#include <linux/errno.h>
   3#include <asm/uaccess.h>
   4
   5#include <asm/sfp-machine.h>
   6#include <math-emu/soft-fp.h>
   7#include <math-emu/double.h>
   8#include <math-emu/single.h>
   9
  10int
  11fdivs(void *frD, void *frA, void *frB)
  12{
  13        FP_DECL_D(A);
  14        FP_DECL_D(B);
  15        FP_DECL_D(R);
  16        FP_DECL_EX;
  17
  18#ifdef DEBUG
  19        printk("%s: %p %p %p\n", __func__, frD, frA, frB);
  20#endif
  21
  22        FP_UNPACK_DP(A, frA);
  23        FP_UNPACK_DP(B, frB);
  24
  25#ifdef DEBUG
  26        printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  27        printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  28#endif
  29
  30        if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {
  31                FP_SET_EXCEPTION(EFLAG_VXZDZ);
  32#ifdef DEBUG
  33                printk("%s: FPSCR_VXZDZ raised\n", __func__);
  34#endif
  35        }
  36        if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
  37                FP_SET_EXCEPTION(EFLAG_VXIDI);
  38#ifdef DEBUG
  39                printk("%s: FPSCR_VXIDI raised\n", __func__);
  40#endif
  41        }
  42
  43        if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
  44                FP_SET_EXCEPTION(EFLAG_DIVZERO);
  45                if (__FPU_TRAP_P(EFLAG_DIVZERO))
  46                        return FP_CUR_EXCEPTIONS;
  47        }
  48
  49        FP_DIV_D(R, A, B);
  50
  51#ifdef DEBUG
  52        printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  53#endif
  54
  55        __FP_PACK_DS(frD, R);
  56
  57        return FP_CUR_EXCEPTIONS;
  58}
  59