text: 
  /*============================================================================
  
  This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
  Package, Release 3a, by John R. Hauser.
  
  Copyright 2011, 2012, 2013, 2014 The Regents of the University of California.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
  
   1. Redistributions of source code must retain the above copyright notice,
      this list of conditions, and the following disclaimer.
  
   2. Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions, and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
  
   3. Neither the name of the University nor the names of its contributors may
      be used to endorse or promote products derived from this software without
      specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
  DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  =============================================================================*/
  
  #include <stdbool.h>
  #include <stdint.h>
  #include "platform.h"
  #include "internals.h"
  #include "softfloat.h"
  
  int_fast64_t
   extF80_to_i64( extFloat80_t a, uint_fast8_t roundingMode, bool exact )
  {
      union { struct extFloat80M s; extFloat80_t f; } uA;
      uint_fast16_t uiA64;
      bool sign;
      int_fast32_t exp;
      uint_fast64_t sig;
      int_fast32_t shiftCount;
      uint_fast64_t sigExtra;
      struct uint64_extra sig64Extra;
  
      uA.f = a;
      uiA64 = uA.s.signExp;
      sign = signExtF80UI64( uiA64 );
      exp  = expExtF80UI64( uiA64 );
      sig = uA.s.signif;
      shiftCount = 0x403E - exp;
      if ( shiftCount <= 0 ) {
          if ( shiftCount ) {
              softfloat_raiseFlags( softfloat_flag_invalid );
              return
                     ! sign
                  || ((exp == 0x7FFF) && (sig & UINT64_C( 0x7FFFFFFFFFFFFFFF )))
                      ? INT64_C( 0x7FFFFFFFFFFFFFFF )
                      : -INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
          }
          sigExtra = 0;
      } else {
          sig64Extra = softfloat_shiftRightJam64Extra( sig, 0, shiftCount );
          sig = sig64Extra.v;
          sigExtra = sig64Extra.extra;
      }
      return
          softfloat_roundPackToI64( sign, sig, sigExtra, roundingMode, exact );
  
  }
  
  