text: /* $Id: fmsub.c,v 1.1.1.1 2001/02/22 14:58:10 serg Exp $
   */
  
  #include <linux/types.h>
  #include <linux/errno.h>
  #include <asm/uaccess.h>
  
  #include "soft-fp.h"
  #include "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);
  	int ret = 0;
  
  #ifdef DEBUG
  	printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC);
  #endif
  
  	__FP_UNPACK_D(A, frA);
  	__FP_UNPACK_D(B, frB);
  	__FP_UNPACK_D(C, frC);
  
  #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);
  	printk("C: %ld %lu %lu %ld (%ld)\n", 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))
  		ret |= 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)
  		ret |= EFLAG_VXISI;
  
  	FP_ADD_D(R, T, 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));
  }
  