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 "softfloat.h"
|
---|
42 |
|
---|
43 | bool f32_lt( float32_t a, float32_t b SOFTFLOAT_STATE_DECL_COMMA )
|
---|
44 | {
|
---|
45 | union ui32_f32 uA;
|
---|
46 | uint_fast32_t uiA;
|
---|
47 | union ui32_f32 uB;
|
---|
48 | uint_fast32_t uiB;
|
---|
49 | bool signA, signB;
|
---|
50 |
|
---|
51 | uA.f = a;
|
---|
52 | uiA = uA.ui;
|
---|
53 | uB.f = b;
|
---|
54 | uiB = uB.ui;
|
---|
55 | if ( isNaNF32UI( uiA ) || isNaNF32UI( uiB ) ) {
|
---|
56 | softfloat_raiseFlags( softfloat_flag_invalid SOFTFLOAT_STATE_ARG_COMMA );
|
---|
57 | return false;
|
---|
58 | }
|
---|
59 | signA = signF32UI( uiA );
|
---|
60 | signB = signF32UI( uiB );
|
---|
61 | return
|
---|
62 | (signA != signB) ? signA && ((uint32_t) ((uiA | uiB)<<1) != 0)
|
---|
63 | : (uiA != uiB) && (signA ^ (uiA < uiB));
|
---|
64 |
|
---|
65 | }
|
---|
66 |
|
---|