gem5  v22.1.0.0
fenv.cc
Go to the documentation of this file.
1 /*
2  * Copyright 2021 Google Inc.
3  * Copyright (c) 2007 The Regents of The University of Michigan
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met: redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer;
10  * redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution;
13  * neither the name of the copyright holders nor the names of its
14  * contributors may be used to endorse or promote products derived from
15  * this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include "base/fenv.hh"
31 
32 #include <fenv.h>
33 
34 #include <cstdlib>
35 
36 namespace gem5
37 {
38 
39 static const int roundOps[] =
40  { FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD };
41 
42 void setFpRound(RoundingMode rm) { fesetround(roundOps[(int)rm]); }
43 
46 {
47  int rm = fegetround();
48  for (int x = 0; x < 4; x++)
49  if (roundOps[x] == rm)
50  return (RoundingMode)x;
51  abort();
52 }
53 
54 } // namespace gem5
Bitfield< 3, 0 > rm
Definition: types.hh:118
Bitfield< 4 > x
Definition: pagetable.hh:61
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
RoundingMode
Definition: fenv.hh:38
void setFpRound(RoundingMode rm)
Definition: fenv.cc:42
static const int roundOps[]
Definition: fenv.cc:39
RoundingMode getFpRound()
Definition: fenv.cc:45

Generated on Wed Dec 21 2022 10:22:28 for gem5 by doxygen 1.9.1