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 2017 The Regents of the University of California.  All rights
8reserved.
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 opts_GCC_h
38#define opts_GCC_h 1
39
40#ifdef INLINE
41
42#include <stdint.h>
43#include "primitiveTypes.h"
44
45#ifdef SOFTFLOAT_BUILTIN_CLZ
46
47INLINE uint_fast8_t softfloat_countLeadingZeros16( uint16_t a )
48    { return a ? __builtin_clz( a ) - 16 : 16; }
49#define softfloat_countLeadingZeros16 softfloat_countLeadingZeros16
50
51INLINE uint_fast8_t softfloat_countLeadingZeros32( uint32_t a )
52    { return a ? __builtin_clz( a ) : 32; }
53#define softfloat_countLeadingZeros32 softfloat_countLeadingZeros32
54
55INLINE uint_fast8_t softfloat_countLeadingZeros64( uint64_t a )
56    { return a ? __builtin_clzll( a ) : 64; }
57#define softfloat_countLeadingZeros64 softfloat_countLeadingZeros64
58
59#endif
60
61#ifdef SOFTFLOAT_INTRINSIC_INT128
62
63INLINE struct uint128 softfloat_mul64ByShifted32To128( uint64_t a, uint32_t b )
64{
65    union { unsigned __int128 ui; struct uint128 s; } uZ;
66    uZ.ui = (unsigned __int128) a * ((uint_fast64_t) b<<32);
67    return uZ.s;
68}
69#define softfloat_mul64ByShifted32To128 softfloat_mul64ByShifted32To128
70
71INLINE struct uint128 softfloat_mul64To128( uint64_t a, uint64_t b )
72{
73    union { unsigned __int128 ui; struct uint128 s; } uZ;
74    uZ.ui = (unsigned __int128) a * b;
75    return uZ.s;
76}
77#define softfloat_mul64To128 softfloat_mul64To128
78
79INLINE
80struct uint128 softfloat_mul128By32( uint64_t a64, uint64_t a0, uint32_t b )
81{
82    union { unsigned __int128 ui; struct uint128 s; } uZ;
83    uZ.ui = ((unsigned __int128) a64<<64 | a0) * b;
84    return uZ.s;
85}
86#define softfloat_mul128By32 softfloat_mul128By32
87
88INLINE
89void
90 softfloat_mul128To256M(
91     uint64_t a64, uint64_t a0, uint64_t b64, uint64_t b0, uint64_t *zPtr )
92{
93    unsigned __int128 z0, mid1, mid, z128;
94    z0 = (unsigned __int128) a0 * b0;
95    mid1 = (unsigned __int128) a64 * b0;
96    mid = mid1 + (unsigned __int128) a0 * b64;
97    z128 = (unsigned __int128) a64 * b64;
98    z128 += (unsigned __int128) (mid < mid1)<<64 | mid>>64;
99    mid <<= 64;
100    z0 += mid;
101    z128 += (z0 < mid);
102    zPtr[indexWord( 4, 0 )] = z0;
103    zPtr[indexWord( 4, 1 )] = z0>>64;
104    zPtr[indexWord( 4, 2 )] = z128;
105    zPtr[indexWord( 4, 3 )] = z128>>64;
106}
107#define softfloat_mul128To256M softfloat_mul128To256M
108
109#endif
110
111#endif
112
113#endif
114
115