source: libcfa/src/bits/align.hfa @ aec68b6

arm-ehjacob/cs343-translationnew-ast-unique-expr
Last change on this file since aec68b6 was 1c40091, checked in by Peter A. Buhr <pabuhr@…>, 2 years ago

rename cfaabi_dbg_bits_* to cfaabi_bits_*, add fd parameter to cfaabi_bits_* routines

  • Property mode set to 100644
File size: 2.2 KB
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1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// align.hfa --
8//
9// Author           : Thierry Delisle
10// Created On       : Mon Nov 28 12:27:26 2016
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sat Nov 16 18:58:22 2019
13// Update Count     : 3
14//
15// This  library is free  software; you  can redistribute  it and/or  modify it
16// under the terms of the GNU Lesser General Public License as published by the
17// Free Software  Foundation; either  version 2.1 of  the License, or  (at your
18// option) any later version.
19//
20// This library is distributed in the  hope that it will be useful, but WITHOUT
21// ANY  WARRANTY;  without even  the  implied  warranty  of MERCHANTABILITY  or
22// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
23// for more details.
24//
25// You should  have received a  copy of the  GNU Lesser General  Public License
26// along  with this library.
27//
28
29#pragma once
30
31#include <assert.h>
32#include <stdbool.h>
33
34// Minimum size used to align memory boundaries for memory allocations.
35//#define libAlign() (sizeof(double))
36// gcc-7 uses xmms instructions, which require 16 byte alignment.
37#define libAlign() (16)
38
39// Check for power of 2
40static inline bool libPow2( unsigned long int value ) {
41    // clears all bits below value, rounding value down to the next lower multiple of value
42    return (value & (value - 1ul)) == 0ul;
43} // libPow2
44
45
46// Returns value aligned at the floor of align.
47static inline unsigned long int libFloor( unsigned long int value, unsigned long int align ) {
48    assert( libPow2( align ) );
49    // clears all bits above or equal to align, getting (value % align), the phase of value with regards to align
50    return value & -align;
51} // libFloor
52
53
54// Returns value aligned at the ceiling of align.
55
56static inline unsigned long int libCeiling( unsigned long int value, unsigned long int align ) {
57    assert( libPow2( align ) );
58    // "negate, round down, negate" is the same as round up
59    return -libFloor( -value, align );
60} // uCeiling
61
62// Local Variables: //
63// compile-command: "make install" //
64// End: //
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