1
2 /*============================================================================
3
4 This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
5 Package, Release 3e, by John R. Hauser.
6
7 Copyright 2011, 2012, 2013, 2014 The Regents of the University of California.
8 All rights 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 #include <stdbool.h>
38 #include <stdint.h>
39 #include "platform.h"
40 #include "internals.h"
41 #include "specialize.h"
42 #include "softfloat.h"
43
44 #ifdef SOFTFLOAT_FAST_INT64
45
extF80M_le_quiet(const extFloat80_t * aPtr,const extFloat80_t * bPtr)46 bool extF80M_le_quiet( const extFloat80_t *aPtr, const extFloat80_t *bPtr )
47 {
48
49 return extF80_le_quiet( *aPtr, *bPtr );
50
51 }
52
53 #else
54
extF80M_le_quiet(const extFloat80_t * aPtr,const extFloat80_t * bPtr)55 bool extF80M_le_quiet( const extFloat80_t *aPtr, const extFloat80_t *bPtr )
56 {
57 const struct extFloat80M *aSPtr, *bSPtr;
58 uint_fast16_t uiA64;
59 uint64_t uiA0;
60 uint_fast16_t uiB64;
61 uint64_t uiB0;
62 bool signA, ltMags;
63
64 /*------------------------------------------------------------------------
65 *------------------------------------------------------------------------*/
66 aSPtr = (const struct extFloat80M *) aPtr;
67 bSPtr = (const struct extFloat80M *) bPtr;
68 /*------------------------------------------------------------------------
69 *------------------------------------------------------------------------*/
70 uiA64 = aSPtr->signExp;
71 uiA0 = aSPtr->signif;
72 uiB64 = bSPtr->signExp;
73 uiB0 = bSPtr->signif;
74 /*------------------------------------------------------------------------
75 *------------------------------------------------------------------------*/
76 if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) {
77 if (
78 softfloat_isSigNaNExtF80UI( uiA64, uiA0 )
79 || softfloat_isSigNaNExtF80UI( uiB64, uiB0 )
80 ) {
81 softfloat_raiseFlags( softfloat_flag_invalid );
82 }
83 return false;
84 }
85 /*------------------------------------------------------------------------
86 *------------------------------------------------------------------------*/
87 signA = signExtF80UI64( uiA64 );
88 if ( (uiA64 ^ uiB64) & 0x8000 ) {
89 /*--------------------------------------------------------------------
90 | Signs are different.
91 *--------------------------------------------------------------------*/
92 return signA || ! (uiA0 | uiB0);
93 } else {
94 /*--------------------------------------------------------------------
95 | Signs are the same.
96 *--------------------------------------------------------------------*/
97 if ( ! ((uiA0 & uiB0) & UINT64_C( 0x8000000000000000 )) ) {
98 return (softfloat_compareNonnormExtF80M( aSPtr, bSPtr ) <= 0);
99 }
100 if ( uiA64 == uiB64 ) {
101 if ( uiA0 == uiB0 ) return true;
102 ltMags = (uiA0 < uiB0);
103 } else {
104 ltMags = (uiA64 < uiB64);
105 }
106 return signA ^ ltMags;
107 }
108
109 }
110
111 #endif
112
113