LXR linux-old/arch/ppc/math-emu/fmadds.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
   9int
  10fmadds(void *frD, void *frA, void *frB, void *frC)
  11{
  12        FP_DECL_D(R);
  13        FP_DECL_D(A);
  14        FP_DECL_D(B);
  15        FP_DECL_D(C);
  16        FP_DECL_D(T);
  17        int ret = 0;
  18
  19#ifdef DEBUG
  20        printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC);
  21#endif
  22
  23        __FP_UNPACK_D(A, frA);
  24        __FP_UNPACK_D(B, frB);
  25        __FP_UNPACK_D(C, frC);
  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        printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
  31#endif
  32
  33        if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
  34            (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
  35                ret |= EFLAG_VXIMZ;
  36
  37        FP_MUL_D(T, A, C);
  38
  39        if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
  40                ret |= EFLAG_VXISI;
  41
  42        FP_ADD_D(R, T, B);
  43
  44#ifdef DEBUG
  45        printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  46#endif
  47
  48        return (ret | __FP_PACK_DS(frD, R));
  49}
  50