1
2/*============================================================================
3
4This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
5Package, Release 3e, by John R. Hauser.
6
7Copyright 2011, 2012, 2013, 2014, 2015, 2017 The Regents of the University of
8California.  All rights reserved.
9
10Redistribution and use in source and binary forms, with or without
11modification, are permitted provided that the following conditions are met:
12
13 1. Redistributions of source code must retain the above copyright notice,
14    this list of conditions, and the following disclaimer.
15
16 2. Redistributions in binary form must reproduce the above copyright notice,
17    this list of conditions, and the following disclaimer in the documentation
18    and/or other materials provided with the distribution.
19
20 3. Neither the name of the University nor the names of its contributors may
21    be used to endorse or promote products derived from this software without
22    specific prior written permission.
23
24THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
25EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
26WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
27DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
28DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34
35=============================================================================*/
36
37#ifndef softfloat_types_h
38#define softfloat_types_h 1
39
40#include <stdint.h>
41
42/*----------------------------------------------------------------------------
43| Types used to pass 16-bit, 32-bit, 64-bit, and 128-bit floating-point
44| arguments and results to/from functions.  These types must be exactly
45| 16 bits, 32 bits, 64 bits, and 128 bits in size, respectively.  Where a
46| platform has "native" support for IEEE-Standard floating-point formats,
47| the types below may, if desired, be defined as aliases for the native types
48| (typically 'float' and 'double', and possibly 'long double').
49*----------------------------------------------------------------------------*/
50typedef struct { uint16_t v; } float16_t;
51typedef struct { uint32_t v; } float32_t;
52typedef struct { uint64_t v; } float64_t;
53typedef struct { uint64_t v[2]; } float128_t;
54
55/*----------------------------------------------------------------------------
56| The format of an 80-bit extended floating-point number in memory.  This
57| structure must contain a 16-bit field named 'signExp' and a 64-bit field
58| named 'signif'.
59*----------------------------------------------------------------------------*/
60#ifdef LITTLEENDIAN
61struct extFloat80M { uint64_t signif; uint16_t signExp; };
62#else
63struct extFloat80M { uint16_t signExp; uint64_t signif; };
64#endif
65
66/*----------------------------------------------------------------------------
67| The type used to pass 80-bit extended floating-point arguments and
68| results to/from functions.  This type must have size identical to
69| 'struct extFloat80M'.  Type 'extFloat80_t' can be defined as an alias for
70| 'struct extFloat80M'.  Alternatively, if a platform has "native" support
71| for IEEE-Standard 80-bit extended floating-point, it may be possible,
72| if desired, to define 'extFloat80_t' as an alias for the native type
73| (presumably either 'long double' or a nonstandard compiler-intrinsic type).
74| In that case, the 'signif' and 'signExp' fields of 'struct extFloat80M'
75| must align exactly with the locations in memory of the sign, exponent, and
76| significand of the native type.
77*----------------------------------------------------------------------------*/
78typedef struct extFloat80M extFloat80_t;
79
80#endif
81
82