1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Copyright (c) 2014,2015 Advanced Micro Devices, Inc.
*
* Copyright (c) 2017 Michal Babej / Tampere University of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
_CL_OVERLOADABLE vtype tan(vtype x) {
/*
* TODO this does not work, for some reason
*
* vtype sinx, cosx;
* sinx = sincos(x, (private vtype *)&cosx);
* return sinx / cosx;
*/
vtype y = fabs(x);
vtype r, rr, r2, rr2;
itype regn, regn2;
__pocl_remainder_piby2_medium(y, &r, &rr, ®n);
itype cond = (y >= (vtype)0x1.0p+47);
if (SV_ANY(cond)) {
__pocl_remainder_piby2_large(y, &r2, &rr2, ®n2);
regn = cond ? regn2 : regn;
r = cond ? r2 : r;
rr = cond ? rr2 : rr;
}
v2type sc = __pocl_sincos_piby4(r, rr);
cond = (regn << 63);
vtype ss = sc.lo;
vtype cc = sc.hi;
itype s = cond ? as_itype(cc) : as_itype(ss);
ss = -sc.lo;
itype c = cond ? as_itype(ss) : as_itype(cc);
itype sgn = ((regn >> 1) << 63);
s ^= sgn;
c ^= sgn;
s ^= (as_itype(x) & (itype)SIGNBIT_DP64);
vtype ret = as_vtype(s) / as_vtype(c);
vtype nans = as_vtype( (as_utype(x) & (utype)SIGNBIT_DP64)
| ((utype)QNANBITPATT_DP64) );
return (isnan(x) | isinf(x)) ? nans : ret;
}
|
