aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/m68k/fpu/__math.h
blob: a9ae2d966c3a59735459d8bccd9cd5a73c43970a (plain)
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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#ifdef	__GNUC__

#include <sys/cdefs.h>

#ifdef	__NO_MATH_INLINES
/* This is used when defining the functions themselves.  Define them with
   __ names, and with `static inline' instead of `extern inline' so the
   bodies will always be used, never an external function call.  */
#define	__m81_u(x)	__CONCAT(__,x)
#define __m81_inline	static __inline
#else
#define	__m81_u(x)	x
#define __m81_inline	exter __inline
#define	__MATH_INLINES	1
#endif

#define	__inline_mathop2(func, op)					      \
  __m81_inline __CONSTVALUE double					      \
  __m81_u(func)(double __mathop_x)					      \
  {									      \
    double __result;							      \
    __asm("f" __STRING(op) "%.x %1, %0" : "=f" (__result) : "f" (__mathop_x));\
    return __result;							      \
  }
#define	__inline_mathop(op)		__inline_mathop2(op, op)

__inline_mathop(acos)
__inline_mathop(asin)
__inline_mathop(atan)
__inline_mathop(cos)
__inline_mathop(sin)
__inline_mathop(tan)
__inline_mathop(cosh)
__inline_mathop(sinh)
__inline_mathop(tanh)
__inline_mathop2(exp, etox)
__inline_mathop2(fabs, abs)
__inline_mathop(log10)
__inline_mathop2(log, logn)
__inline_mathop2(floor, intrz)
__inline_mathop(sqrt)

__inline_mathop2(__rint, int)
__inline_mathop2(__expm1, etoxm1)

#ifdef	__USE_MISC
__inline_mathop2(rint, int)
__inline_mathop2(expm1, etoxm1)
__inline_mathop2(log1p, lognp1)
__inline_mathop(atanh)
#endif

__m81_inline __CONSTVALUE double
__m81_u(__drem)(double __x, double __y)
{
  double __result;
  __asm("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
  return __result;
}

__m81_inline __CONSTVALUE double
__m81_u(ldexp)(double __x, int __e)
{
  double __result;
  double __double_e = (double) __e;
  __asm("fscale%.x %1, %0" : "=f" (__result) : "f" (__double_e), "0" (__x));
  return __result;
}

__m81_inline __CONSTVALUE double
__m81_u(fmod)(double __x, double __y)
{
  double __result;
  __asm("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
  return __result;
}

__m81_inline double
__m81_u(frexp)(double __value, int *__expptr)
{
  double __mantissa, __exponent;
  __asm("fgetexp%.x %1, %0" : "=f" (__exponent) : "f" (__value));
  __asm("fgetman%.x %1, %0" : "=f" (__mantissa) : "f" (__value));
  *__expptr = (int) __exponent;
  return __mantissa;
}

__m81_inline __CONSTVALUE double
__m81_u(pow)(double __x, double __y)
{
  double __result;
  if (__y == 0.0 || __x == 1.0)
    __result = 1.0;
  else if (__y == 1.0)
    __result = __x;
  else if (__y == 2.0)
    __result = __x * __x;
  else if (__x == 10.0)
    __asm("ftentox%.x %1, %0" : "=f" (__result) : "f" (__y));
  else if (__x == 2.0)
    __asm("ftwotox%.x %1, %0" : "=f" (__result) : "f" (__y));
  else
    __result = __m81_u(exp)(__y * __m81_u(log)(__x));
  return __result;
}

__m81_inline __CONSTVALUE double
__m81_u(ceil)(double __x)
{
  double __result;
  unsigned long int __ctrl_reg;
  __asm("fmove%.l fpcr, %0" : "=g" (__ctrl_reg));
  /* Set rounding towards positive infinity.  */
  __asm("fmove%.l %0, fpcr" : /* No outputs.  */ : "g" (__ctrl_reg | 0x30));
  /* Convert X to an integer, using +Inf rounding.  */
  __asm("fint%.x %1, %0" : "=f" (__result) : "f" (__x));
  /* Restore the previous rounding mode.  */
  __asm("fmove%.l %0, fpcr" : /* No outputs.  */ : "g" (__ctrl_reg));
  return __result;
}

__m81_inline double
__m81_u(modf)(double __value, double *__iptr)
{
  double __modf_int = __m81_u(floor)(__value);
  *__iptr = __modf_int;
  return __value - __modf_int;
}

__m81_inline __CONSTVALUE int
__m81_u(__isinf)(double __value)
{
  /* There is no branch-condition for infinity,
     so we must extract and examine the condition codes manually.  */
  unsigned long int __fpsr;
  __asm("ftst%.x %1\n"
	"fmove%.l fpsr, %0" : "=g" (__fpsr) : "f" (__value));
  return (__fpsr & (2 << (3 * 8))) ? (__value < 0 ? -1 : 1) : 0;
}

__m81_inline __CONSTVALUE int
__m81_u(__isnan)(double __value)
{
  char __result;
  __asm("ftst%.x %1\n"
	"fsun %0" : "=g" (__result) : "f" (__value));
  return __result;
}

#endif	/* GCC.  */