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
|
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*
*/
/* Based on newlib/libm/mathfp/e_atanh.c in Newlib. */
#include "amdgcnmach.h"
v64df v64df_log1p_aux (v64df, v64di);
DEF_VD_MATH_FUNC (v64df, atanh, v64df x)
{
static const double zero = 0.0;
static const double one = 1.0, huge = 1e300;
FUNCTION_INIT (v64df);
v64df t;
v64si hx, lx;
EXTRACT_WORDS (hx, lx, x);
v64si ix = hx & 0x7fffffff;
VECTOR_IF ((ix | ((lx | (-lx)) >> 31)) > 0x3ff00000, cond) // |x|>1
VECTOR_RETURN ((x - x)/(x - x), cond);
VECTOR_ENDIF
VECTOR_IF (ix == 0x3ff00000, cond)
VECTOR_RETURN (x / zero, cond);
VECTOR_ENDIF
VECTOR_IF ((ix < 0x3e300000) & __builtin_convertvector((huge + x) > zero, v64si), cond) // x<2**-28
VECTOR_RETURN (x, cond);
VECTOR_ENDIF
SET_HIGH_WORD (x, ix, NO_COND);
VECTOR_IF (ix < 0x3fe00000, cond) // x < 0.5 */
v64df t2 = x + x;
VECTOR_COND_MOVE (t, 0.5 * v64df_log1p_aux (t2 + t2 * x / (one - x), __mask), cond);
VECTOR_ELSE (cond)
VECTOR_COND_MOVE (t, 0.5 * v64df_log1p_aux ((x + x) / (one - x), __mask), cond);
VECTOR_ENDIF
VECTOR_IF (hx >= 0, cond)
VECTOR_RETURN (t, cond);
VECTOR_ELSE (cond)
VECTOR_RETURN (-t, cond);
VECTOR_ENDIF
FUNCTION_RETURN;
}
DEF_VARIANTS (atanh, df, df)
|
