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

  #include <asm/sfp-machine.h>
  #include <math-emu/soft-fp.h>
  #include <math-emu/double.h>

  
  int
  fmsub(void *frD, void *frA, void *frB, void *frC)
  {
  	FP_DECL_D(R);
  	FP_DECL_D(A);
  	FP_DECL_D(B);
  	FP_DECL_D(C);
  	FP_DECL_D(T);

  	FP_DECL_EX;

  
  #ifdef DEBUG

  	printk("%s: %p %p %p %p
  ", __func__, frD, frA, frB, frC);

  #endif

  	FP_UNPACK_DP(A, frA);
  	FP_UNPACK_DP(B, frB);
  	FP_UNPACK_DP(C, frC);

  
  #ifdef DEBUG
  	printk("A: %ld %lu %lu %ld (%ld)
  ", A_s, A_f1, A_f0, A_e, A_c);
  	printk("B: %ld %lu %lu %ld (%ld)
  ", B_s, B_f1, B_f0, B_e, B_c);
  	printk("C: %ld %lu %lu %ld (%ld)
  ", C_s, C_f1, C_f0, C_e, C_c);
  #endif
  
  	if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
  	    (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))

  		FP_SET_EXCEPTION(EFLAG_VXIMZ);

  
  	FP_MUL_D(T, A, C);
  
  	if (B_c != FP_CLS_NAN)
  		B_s ^= 1;
  
  	if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)

  		FP_SET_EXCEPTION(EFLAG_VXISI);

  
  	FP_ADD_D(R, T, B);
  
  #ifdef DEBUG
  	printk("D: %ld %lu %lu %ld (%ld)
  ", R_s, R_f1, R_f0, R_e, R_c);
  #endif

  	__FP_PACK_D(frD, R);
  
  	return FP_CUR_EXCEPTIONS;

  }