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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [config/] [m68k/] [math-68881.h] - Blame information for rev 645

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/******************************************************************\
*                                                                  *
*  <math-68881.h>               last modified: 23 May 1992.        *
*                                                                  *
*  Copyright (C) 1989 by Matthew Self.                             *
*  You may freely distribute verbatim copies of this software      *
*  provided that this copyright notice is retained in all copies.  *
*  You may distribute modifications to this software under the     *
*  conditions above if you also clearly note such modifications    *
*  with their author and date.                                     *
*                                                                  *
*  Note:  errno is not set to EDOM when domain errors occur for    *
*  most of these functions.  Rather, it is assumed that the        *
*  68881's OPERR exception will be enabled and handled             *
*  appropriately by the operating system.  Similarly, overflow     *
*  and underflow do not set errno to ERANGE.                       *
*                                                                  *
*  Send bugs to Matthew Self (self@bayes.arc.nasa.gov).            *
*                                                                  *
\******************************************************************/
 
/* This file is NOT a part of GCC, just distributed with it.  */
 
/* If you find this in GCC,
   please send bug reports to bug-gcc@prep.ai.mit.edu.  */
 
/* Changed by Richard Stallman:
   May 1993, add conditional to prevent multiple inclusion.
   % inserted before a #.
   New function `hypot' added.
   Nans written in hex to avoid 0rnan.
   May 1992, use %! for fpcr register.  Break lines before function names.
   December 1989, add parens around `&' in pow.
   November 1990, added alternate definition of HUGE_VAL for Sun.  */
 
/* Changed by Jim Wilson:
   September 1993, Use #undef before HUGE_VAL instead of #ifdef/#endif.  */
 
/* Changed by Ian Lance Taylor:
   September 1994, use extern inline instead of static inline.  */
 
#ifndef __math_68881
#define __math_68881
 
#include <errno.h>
 
#undef HUGE_VAL
#ifdef __sun__
/* The Sun assembler fails to handle the hex constant in the usual defn.  */
#define HUGE_VAL                                                        \
({                                                                      \
  static union { int i[2]; double d; } u = { {0x7ff00000, 0} };          \
  u.d;                                                                  \
})
#else
#define HUGE_VAL                                                        \
({                                                                      \
  double huge_val;                                                      \
                                                                        \
  __asm ("fmove%.d #0x7ff0000000000000,%0"      /* Infinity */          \
         : "=f" (huge_val)                                              \
         : /* no inputs */);                                            \
  huge_val;                                                             \
})
#endif
 
__inline extern double
sin (double x)
{
  double value;
 
  __asm ("fsin%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
cos (double x)
{
  double value;
 
  __asm ("fcos%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
tan (double x)
{
  double value;
 
  __asm ("ftan%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
asin (double x)
{
  double value;
 
  __asm ("fasin%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
acos (double x)
{
  double value;
 
  __asm ("facos%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
atan (double x)
{
  double value;
 
  __asm ("fatan%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
atan2 (double y, double x)
{
  double pi, pi_over_2;
 
  __asm ("fmovecr%.x #0,%0"             /* extended precision pi */
         : "=f" (pi)
         : /* no inputs */ );
  __asm ("fscale%.b #-1,%0"             /* no loss of accuracy */
         : "=f" (pi_over_2)
         : "0" (pi));
  if (x > 0)
    {
      if (y > 0)
        {
          if (x > y)
            return atan (y / x);
          else
            return pi_over_2 - atan (x / y);
        }
      else
        {
          if (x > -y)
            return atan (y / x);
          else
            return - pi_over_2 - atan (x / y);
        }
    }
  else
    {
      if (y < 0)
        {
          if (-x > -y)
            return - pi + atan (y / x);
          else
            return - pi_over_2 - atan (x / y);
        }
      else
        {
          if (-x > y)
            return pi + atan (y / x);
          else if (y > 0)
            return pi_over_2 - atan (x / y);
          else
            {
              double value;
 
              errno = EDOM;
              __asm ("fmove%.d #0x7fffffffffffffff,%0"  /* quiet NaN */
                     : "=f" (value)
                     : /* no inputs */);
              return value;
            }
        }
    }
}
 
__inline extern double
sinh (double x)
{
  double value;
 
  __asm ("fsinh%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
cosh (double x)
{
  double value;
 
  __asm ("fcosh%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
tanh (double x)
{
  double value;
 
  __asm ("ftanh%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
atanh (double x)
{
  double value;
 
  __asm ("fatanh%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
exp (double x)
{
  double value;
 
  __asm ("fetox%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
expm1 (double x)
{
  double value;
 
  __asm ("fetoxm1%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
log (double x)
{
  double value;
 
  __asm ("flogn%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
log1p (double x)
{
  double value;
 
  __asm ("flognp1%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
log10 (double x)
{
  double value;
 
  __asm ("flog10%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
sqrt (double x)
{
  double value;
 
  __asm ("fsqrt%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
hypot (double x, double y)
{
  return sqrt (x*x + y*y);
}
 
__inline extern double
pow (double x, double y)
{
  if (x > 0)
    return exp (y * log (x));
  else if (x == 0)
    {
      if (y > 0)
        return 0.0;
      else
        {
          double value;
 
          errno = EDOM;
          __asm ("fmove%.d #0x7fffffffffffffff,%0"              /* quiet NaN */
                 : "=f" (value)
                 : /* no inputs */);
          return value;
        }
    }
  else
    {
      double temp;
 
      __asm ("fintrz%.x %1,%0"
             : "=f" (temp)                      /* integer-valued float */
             : "f" (y));
      if (y == temp)
        {
          int i = (int) y;
 
          if ((i & 1) == 0)                      /* even */
            return exp (y * log (-x));
          else
            return - exp (y * log (-x));
        }
      else
        {
          double value;
 
          errno = EDOM;
          __asm ("fmove%.d #0x7fffffffffffffff,%0"              /* quiet NaN */
                 : "=f" (value)
                 : /* no inputs */);
          return value;
        }
    }
}
 
__inline extern double
fabs (double x)
{
  double value;
 
  __asm ("fabs%.x %1,%0"
         : "=f" (value)
         : "f" (x));
  return value;
}
 
__inline extern double
ceil (double x)
{
  int rounding_mode, round_up;
  double value;
 
  __asm volatile ("fmove%.l %!,%0"
                  : "=dm" (rounding_mode)
                  : /* no inputs */ );
  round_up = rounding_mode | 0x30;
  __asm volatile ("fmove%.l %0,%!"
                  : /* no outputs */
                  : "dmi" (round_up));
  __asm volatile ("fint%.x %1,%0"
                  : "=f" (value)
                  : "f" (x));
  __asm volatile ("fmove%.l %0,%!"
                  : /* no outputs */
                  : "dmi" (rounding_mode));
  return value;
}
 
__inline extern double
floor (double x)
{
  int rounding_mode, round_down;
  double value;
 
  __asm volatile ("fmove%.l %!,%0"
                  : "=dm" (rounding_mode)
                  : /* no inputs */ );
  round_down = (rounding_mode & ~0x10)
                | 0x20;
  __asm volatile ("fmove%.l %0,%!"
                  : /* no outputs */
                  : "dmi" (round_down));
  __asm volatile ("fint%.x %1,%0"
                  : "=f" (value)
                  : "f" (x));
  __asm volatile ("fmove%.l %0,%!"
                  : /* no outputs */
                  : "dmi" (rounding_mode));
  return value;
}
 
__inline extern double
rint (double x)
{
  int rounding_mode, round_nearest;
  double value;
 
  __asm volatile ("fmove%.l %!,%0"
                  : "=dm" (rounding_mode)
                  : /* no inputs */ );
  round_nearest = rounding_mode & ~0x30;
  __asm volatile ("fmove%.l %0,%!"
                  : /* no outputs */
                  : "dmi" (round_nearest));
  __asm volatile ("fint%.x %1,%0"
                  : "=f" (value)
                  : "f" (x));
  __asm volatile ("fmove%.l %0,%!"
                  : /* no outputs */
                  : "dmi" (rounding_mode));
  return value;
}
 
__inline extern double
fmod (double x, double y)
{
  double value;
 
  __asm ("fmod%.x %2,%0"
         : "=f" (value)
         : "0" (x),
           "f" (y));
  return value;
}
 
__inline extern double
drem (double x, double y)
{
  double value;
 
  __asm ("frem%.x %2,%0"
         : "=f" (value)
         : "0" (x),
           "f" (y));
  return value;
}
 
__inline extern double
scalb (double x, int n)
{
  double value;
 
  __asm ("fscale%.l %2,%0"
         : "=f" (value)
         : "0" (x),
           "dmi" (n));
  return value;
}
 
__inline extern double
logb (double x)
{
  double exponent;
 
  __asm ("fgetexp%.x %1,%0"
         : "=f" (exponent)
         : "f" (x));
  return exponent;
}
 
__inline extern double
ldexp (double x, int n)
{
  double value;
 
  __asm ("fscale%.l %2,%0"
         : "=f" (value)
         : "0" (x),
           "dmi" (n));
  return value;
}
 
__inline extern double
frexp (double x, int *exp)
{
  double float_exponent;
  int int_exponent;
  double mantissa;
 
  __asm ("fgetexp%.x %1,%0"
         : "=f" (float_exponent)        /* integer-valued float */
         : "f" (x));
  int_exponent = (int) float_exponent;
  __asm ("fgetman%.x %1,%0"
         : "=f" (mantissa)              /* 1.0 <= mantissa < 2.0 */
         : "f" (x));
  if (mantissa != 0)
    {
      __asm ("fscale%.b #-1,%0"
             : "=f" (mantissa)          /* mantissa /= 2.0 */
             : "0" (mantissa));
      int_exponent += 1;
    }
  *exp = int_exponent;
  return mantissa;
}
 
__inline extern double
modf (double x, double *ip)
{
  double temp;
 
  __asm ("fintrz%.x %1,%0"
         : "=f" (temp)                  /* integer-valued float */
         : "f" (x));
  *ip = temp;
  return x - temp;
}
 
#endif /* not __math_68881 */

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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [config/] [m68k/] [math-68881.h] - Blame information for rev 645

Line No.	Rev	Author	Line
1	38	julius	`/******************************************************************\`
2			`* *`
3			`* <math-68881.h> last modified: 23 May 1992. *`
4			`* *`
5			`* Copyright (C) 1989 by Matthew Self. *`
6			`* You may freely distribute verbatim copies of this software *`
7			`* provided that this copyright notice is retained in all copies. *`
8			`* You may distribute modifications to this software under the *`
9			`* conditions above if you also clearly note such modifications *`
10			`* with their author and date. *`
11			`* *`
12			`* Note: errno is not set to EDOM when domain errors occur for *`
13			`* most of these functions. Rather, it is assumed that the *`
14			`* 68881's OPERR exception will be enabled and handled *`
15			`* appropriately by the operating system. Similarly, overflow *`
16			`* and underflow do not set errno to ERANGE. *`
17			`* *`
18			`* Send bugs to Matthew Self (self@bayes.arc.nasa.gov). *`
19			`* *`
20			`\******************************************************************/`
21
22			`/* This file is NOT a part of GCC, just distributed with it. */`
23
24			`/* If you find this in GCC,`
25			`please send bug reports to bug-gcc@prep.ai.mit.edu. */`
26
27			`/* Changed by Richard Stallman:`
28			`May 1993, add conditional to prevent multiple inclusion.`
29			`% inserted before a #.`
30			New function `hypot' added.
31			`Nans written in hex to avoid 0rnan.`
32			`May 1992, use %! for fpcr register. Break lines before function names.`
33			December 1989, add parens around `&' in pow.
34			`November 1990, added alternate definition of HUGE_VAL for Sun. */`
35
36			`/* Changed by Jim Wilson:`
37			`September 1993, Use #undef before HUGE_VAL instead of #ifdef/#endif. */`
38
39			`/* Changed by Ian Lance Taylor:`
40			`September 1994, use extern inline instead of static inline. */`
41
42			`#ifndef __math_68881`
43			`#define __math_68881`
44
45			`#include <errno.h>`
46
47			`#undef HUGE_VAL`
48			`#ifdef __sun__`
49			`/* The Sun assembler fails to handle the hex constant in the usual defn. */`
50			`#define HUGE_VAL \`
51			`({ \`
52			`static union { int i[2]; double d; } u = { {0x7ff00000, 0} }; \`
53			`u.d; \`
54			`})`
55			`#else`
56			`#define HUGE_VAL \`
57			`({ \`
58			`double huge_val; \`
59			`\`
60			`__asm ("fmove%.d #0x7ff0000000000000,%0" /* Infinity */ \`
61			`: "=f" (huge_val) \`
62			`: /* no inputs */); \`
63			`huge_val; \`
64			`})`
65			`#endif`
66
67			`__inline extern double`
68			`sin (double x)`
69			`{`
70			`double value;`
71
72			`__asm ("fsin%.x %1,%0"`
73			`: "=f" (value)`
74			`: "f" (x));`
75			`return value;`
76			`}`
77
78			`__inline extern double`
79			`cos (double x)`
80			`{`
81			`double value;`
82
83			`__asm ("fcos%.x %1,%0"`
84			`: "=f" (value)`
85			`: "f" (x));`
86			`return value;`
87			`}`
88
89			`__inline extern double`
90			`tan (double x)`
91			`{`
92			`double value;`
93
94			`__asm ("ftan%.x %1,%0"`
95			`: "=f" (value)`
96			`: "f" (x));`
97			`return value;`
98			`}`
99
100			`__inline extern double`
101			`asin (double x)`
102			`{`
103			`double value;`
104
105			`__asm ("fasin%.x %1,%0"`
106			`: "=f" (value)`
107			`: "f" (x));`
108			`return value;`
109			`}`
110
111			`__inline extern double`
112			`acos (double x)`
113			`{`
114			`double value;`
115
116			`__asm ("facos%.x %1,%0"`
117			`: "=f" (value)`
118			`: "f" (x));`
119			`return value;`
120			`}`
121
122			`__inline extern double`
123			`atan (double x)`
124			`{`
125			`double value;`
126
127			`__asm ("fatan%.x %1,%0"`
128			`: "=f" (value)`
129			`: "f" (x));`
130			`return value;`
131			`}`
132
133			`__inline extern double`
134			`atan2 (double y, double x)`
135			`{`
136			`double pi, pi_over_2;`
137
138			`__asm ("fmovecr%.x #0,%0" /* extended precision pi */`
139			`: "=f" (pi)`
140			`: /* no inputs */ );`
141			`__asm ("fscale%.b #-1,%0" /* no loss of accuracy */`
142			`: "=f" (pi_over_2)`
143			`: "0" (pi));`
144			`if (x > 0)`
145			`{`
146			`if (y > 0)`
147			`{`
148			`if (x > y)`
149			`return atan (y / x);`
150			`else`
151			`return pi_over_2 - atan (x / y);`
152			`}`
153			`else`
154			`{`
155			`if (x > -y)`
156			`return atan (y / x);`
157			`else`
158			`return - pi_over_2 - atan (x / y);`
159			`}`
160			`}`
161			`else`
162			`{`
163			`if (y < 0)`
164			`{`
165			`if (-x > -y)`
166			`return - pi + atan (y / x);`
167			`else`
168			`return - pi_over_2 - atan (x / y);`
169			`}`
170			`else`
171			`{`
172			`if (-x > y)`
173			`return pi + atan (y / x);`
174			`else if (y > 0)`
175			`return pi_over_2 - atan (x / y);`
176			`else`
177			`{`
178			`double value;`
179
180			`errno = EDOM;`
181			`__asm ("fmove%.d #0x7fffffffffffffff,%0" /* quiet NaN */`
182			`: "=f" (value)`
183			`: /* no inputs */);`
184			`return value;`
185			`}`
186			`}`
187			`}`
188			`}`
189
190			`__inline extern double`
191			`sinh (double x)`
192			`{`
193			`double value;`
194
195			`__asm ("fsinh%.x %1,%0"`
196			`: "=f" (value)`
197			`: "f" (x));`
198			`return value;`
199			`}`
200
201			`__inline extern double`
202			`cosh (double x)`
203			`{`
204			`double value;`
205
206			`__asm ("fcosh%.x %1,%0"`
207			`: "=f" (value)`
208			`: "f" (x));`
209			`return value;`
210			`}`
211
212			`__inline extern double`
213			`tanh (double x)`
214			`{`
215			`double value;`
216
217			`__asm ("ftanh%.x %1,%0"`
218			`: "=f" (value)`
219			`: "f" (x));`
220			`return value;`
221			`}`
222
223			`__inline extern double`
224			`atanh (double x)`
225			`{`
226			`double value;`
227
228			`__asm ("fatanh%.x %1,%0"`
229			`: "=f" (value)`
230			`: "f" (x));`
231			`return value;`
232			`}`
233
234			`__inline extern double`
235			`exp (double x)`
236			`{`
237			`double value;`
238
239			`__asm ("fetox%.x %1,%0"`
240			`: "=f" (value)`
241			`: "f" (x));`
242			`return value;`
243			`}`
244
245			`__inline extern double`
246			`expm1 (double x)`
247			`{`
248			`double value;`
249
250			`__asm ("fetoxm1%.x %1,%0"`
251			`: "=f" (value)`
252			`: "f" (x));`
253			`return value;`
254			`}`
255
256			`__inline extern double`
257			`log (double x)`
258			`{`
259			`double value;`
260
261			`__asm ("flogn%.x %1,%0"`
262			`: "=f" (value)`
263			`: "f" (x));`
264			`return value;`
265			`}`
266
267			`__inline extern double`
268			`log1p (double x)`
269			`{`
270			`double value;`
271
272			`__asm ("flognp1%.x %1,%0"`
273			`: "=f" (value)`
274			`: "f" (x));`
275			`return value;`
276			`}`
277
278			`__inline extern double`
279			`log10 (double x)`
280			`{`
281			`double value;`
282
283			`__asm ("flog10%.x %1,%0"`
284			`: "=f" (value)`
285			`: "f" (x));`
286			`return value;`
287			`}`
288
289			`__inline extern double`
290			`sqrt (double x)`
291			`{`
292			`double value;`
293
294			`__asm ("fsqrt%.x %1,%0"`
295			`: "=f" (value)`
296			`: "f" (x));`
297			`return value;`
298			`}`
299
300			`__inline extern double`
301			`hypot (double x, double y)`
302			`{`
303			`return sqrt (xx + yy);`
304			`}`
305
306			`__inline extern double`
307			`pow (double x, double y)`
308			`{`
309			`if (x > 0)`
310			`return exp (y * log (x));`
311			`else if (x == 0)`
312			`{`
313			`if (y > 0)`
314			`return 0.0;`
315			`else`
316			`{`
317			`double value;`
318
319			`errno = EDOM;`
320			`__asm ("fmove%.d #0x7fffffffffffffff,%0" /* quiet NaN */`
321			`: "=f" (value)`
322			`: /* no inputs */);`
323			`return value;`
324			`}`
325			`}`
326			`else`
327			`{`
328			`double temp;`
329
330			`__asm ("fintrz%.x %1,%0"`
331			`: "=f" (temp) /* integer-valued float */`
332			`: "f" (y));`
333			`if (y == temp)`
334			`{`
335			`int i = (int) y;`
336
337			`if ((i & 1) == 0) /* even */`
338			`return exp (y * log (-x));`
339			`else`
340			`return - exp (y * log (-x));`
341			`}`
342			`else`
343			`{`
344			`double value;`
345
346			`errno = EDOM;`
347			`__asm ("fmove%.d #0x7fffffffffffffff,%0" /* quiet NaN */`
348			`: "=f" (value)`
349			`: /* no inputs */);`
350			`return value;`
351			`}`
352			`}`
353			`}`
354
355			`__inline extern double`
356			`fabs (double x)`
357			`{`
358			`double value;`
359
360			`__asm ("fabs%.x %1,%0"`
361			`: "=f" (value)`
362			`: "f" (x));`
363			`return value;`
364			`}`
365
366			`__inline extern double`
367			`ceil (double x)`
368			`{`
369			`int rounding_mode, round_up;`
370			`double value;`
371
372			`__asm volatile ("fmove%.l %!,%0"`
373			`: "=dm" (rounding_mode)`
374			`: /* no inputs */ );`
375			`round_up = rounding_mode \| 0x30;`
376			`__asm volatile ("fmove%.l %0,%!"`
377			`: /* no outputs */`
378			`: "dmi" (round_up));`
379			`__asm volatile ("fint%.x %1,%0"`
380			`: "=f" (value)`
381			`: "f" (x));`
382			`__asm volatile ("fmove%.l %0,%!"`
383			`: /* no outputs */`
384			`: "dmi" (rounding_mode));`
385			`return value;`
386			`}`
387
388			`__inline extern double`
389			`floor (double x)`
390			`{`
391			`int rounding_mode, round_down;`
392			`double value;`
393
394			`__asm volatile ("fmove%.l %!,%0"`
395			`: "=dm" (rounding_mode)`
396			`: /* no inputs */ );`
397			`round_down = (rounding_mode & ~0x10)`
398			`\| 0x20;`
399			`__asm volatile ("fmove%.l %0,%!"`
400			`: /* no outputs */`
401			`: "dmi" (round_down));`
402			`__asm volatile ("fint%.x %1,%0"`
403			`: "=f" (value)`
404			`: "f" (x));`
405			`__asm volatile ("fmove%.l %0,%!"`
406			`: /* no outputs */`
407			`: "dmi" (rounding_mode));`
408			`return value;`
409			`}`
410
411			`__inline extern double`
412			`rint (double x)`
413			`{`
414			`int rounding_mode, round_nearest;`
415			`double value;`
416
417			`__asm volatile ("fmove%.l %!,%0"`
418			`: "=dm" (rounding_mode)`
419			`: /* no inputs */ );`
420			`round_nearest = rounding_mode & ~0x30;`
421			`__asm volatile ("fmove%.l %0,%!"`
422			`: /* no outputs */`
423			`: "dmi" (round_nearest));`
424			`__asm volatile ("fint%.x %1,%0"`
425			`: "=f" (value)`
426			`: "f" (x));`
427			`__asm volatile ("fmove%.l %0,%!"`
428			`: /* no outputs */`
429			`: "dmi" (rounding_mode));`
430			`return value;`
431			`}`
432
433			`__inline extern double`
434			`fmod (double x, double y)`
435			`{`
436			`double value;`
437
438			`__asm ("fmod%.x %2,%0"`
439			`: "=f" (value)`
440			`: "0" (x),`
441			`"f" (y));`
442			`return value;`
443			`}`
444
445			`__inline extern double`
446			`drem (double x, double y)`
447			`{`
448			`double value;`
449
450			`__asm ("frem%.x %2,%0"`
451			`: "=f" (value)`
452			`: "0" (x),`
453			`"f" (y));`
454			`return value;`
455			`}`
456
457			`__inline extern double`
458			`scalb (double x, int n)`
459			`{`
460			`double value;`
461
462			`__asm ("fscale%.l %2,%0"`
463			`: "=f" (value)`
464			`: "0" (x),`
465			`"dmi" (n));`
466			`return value;`
467			`}`
468
469			`__inline extern double`
470			`logb (double x)`
471			`{`
472			`double exponent;`
473
474			`__asm ("fgetexp%.x %1,%0"`
475			`: "=f" (exponent)`
476			`: "f" (x));`
477			`return exponent;`
478			`}`
479
480			`__inline extern double`
481			`ldexp (double x, int n)`
482			`{`
483			`double value;`
484
485			`__asm ("fscale%.l %2,%0"`
486			`: "=f" (value)`
487			`: "0" (x),`
488			`"dmi" (n));`
489			`return value;`
490			`}`
491
492			`__inline extern double`
493			`frexp (double x, int *exp)`
494			`{`
495			`double float_exponent;`
496			`int int_exponent;`
497			`double mantissa;`
498
499			`__asm ("fgetexp%.x %1,%0"`
500			`: "=f" (float_exponent) /* integer-valued float */`
501			`: "f" (x));`
502			`int_exponent = (int) float_exponent;`
503			`__asm ("fgetman%.x %1,%0"`
504			`: "=f" (mantissa) /* 1.0 <= mantissa < 2.0 */`
505			`: "f" (x));`
506			`if (mantissa != 0)`
507			`{`
508			`__asm ("fscale%.b #-1,%0"`
509			`: "=f" (mantissa) /* mantissa /= 2.0 */`
510			`: "0" (mantissa));`
511			`int_exponent += 1;`
512			`}`
513			`*exp = int_exponent;`
514			`return mantissa;`
515			`}`
516
517			`__inline extern double`
518			`modf (double x, double *ip)`
519			`{`
520			`double temp;`
521
522			`__asm ("fintrz%.x %1,%0"`
523			`: "=f" (temp) /* integer-valued float */`
524			`: "f" (x));`
525			`*ip = temp;`
526			`return x - temp;`
527			`}`
528
529			`#endif /* not __math_68881 */`