1
2 /*============================================================================
3
4 This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
5 Package, Release 3e, by John R. Hauser.
6
7 Copyright 2017 The Regents of the University of California. All rights
8 reserved.
9
10 Redistribution and use in source and binary forms, with or without
11 modification, 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
24 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
25 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
26 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
27 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
28 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31 ON 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
33 SOFTWARE, 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
softfloat_countLeadingZeros16(uint16_t a)47 INLINE uint_fast8_t softfloat_countLeadingZeros16( uint16_t a )
48 { return a ? __builtin_clz( a ) - 16 : 16; }
49 #define softfloat_countLeadingZeros16 softfloat_countLeadingZeros16
50
softfloat_countLeadingZeros32(uint32_t a)51 INLINE uint_fast8_t softfloat_countLeadingZeros32( uint32_t a )
52 { return a ? __builtin_clz( a ) : 32; }
53 #define softfloat_countLeadingZeros32 softfloat_countLeadingZeros32
54
softfloat_countLeadingZeros64(uint64_t a)55 INLINE 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
softfloat_mul64ByShifted32To128(uint64_t a,uint32_t b)63 INLINE 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
softfloat_mul64To128(uint64_t a,uint64_t b)71 INLINE 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
79 INLINE
softfloat_mul128By32(uint64_t a64,uint64_t a0,uint32_t b)80 struct 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
88 INLINE
89 void
softfloat_mul128To256M(uint64_t a64,uint64_t a0,uint64_t b64,uint64_t b0,uint64_t * zPtr)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