softfloat-native.h revision 1da50d3beb2a75f619fa56278cb195703361e261 
1/* Native implementation of soft float functions */
2#include <math.h>
3
4#if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
5    || defined(CONFIG_SOLARIS)
6#include <ieeefp.h>
7#define fabsf(f) ((float)fabs(f))
8#else
9#include <fenv.h>
10#endif
11
12#if defined(__OpenBSD__) || defined(__NetBSD__)
13#include <sys/param.h>
14#endif
15
16/*
17 * Define some C99-7.12.3 classification macros and
18 *        some C99-.12.4 for Solaris systems OS less than 10,
19 *        or Solaris 10 systems running GCC 3.x or less.
20 *   Solaris 10 with GCC4 does not need these macros as they
21 *   are defined in <iso/math_c99.h> with a compiler directive
22 */
23#if defined(CONFIG_SOLARIS) && \
24           ((CONFIG_SOLARIS_VERSION <= 9 ) || \
25           ((CONFIG_SOLARIS_VERSION == 10) && (__GNUC__ < 4))) \
26    || (defined(__OpenBSD__) && (OpenBSD < 200811))
27/*
28 * C99 7.12.3 classification macros
29 * and
30 * C99 7.12.14 comparison macros
31 *
32 * ... do not work on Solaris 10 using GNU CC 3.4.x.
33 * Try to workaround the missing / broken C99 math macros.
34 */
35#if defined(__OpenBSD__)
36#define unordered(x, y) (isnan(x) || isnan(y))
37#endif
38
39#ifdef __NetBSD__
40#ifndef isgreater
41#define isgreater(x, y)		__builtin_isgreater(x, y)
42#endif
43#ifndef isgreaterequal
44#define isgreaterequal(x, y)	__builtin_isgreaterequal(x, y)
45#endif
46#ifndef isless
47#define isless(x, y)		__builtin_isless(x, y)
48#endif
49#ifndef islessequal
50#define islessequal(x, y)	__builtin_islessequal(x, y)
51#endif
52#ifndef isunordered
53#define isunordered(x, y)	__builtin_isunordered(x, y)
54#endif
55#endif
56
57
58#define isnormal(x)             (fpclass(x) >= FP_NZERO)
59#define isgreater(x, y)         ((!unordered(x, y)) && ((x) > (y)))
60#define isgreaterequal(x, y)    ((!unordered(x, y)) && ((x) >= (y)))
61#define isless(x, y)            ((!unordered(x, y)) && ((x) < (y)))
62#define islessequal(x, y)       ((!unordered(x, y)) && ((x) <= (y)))
63#define isunordered(x,y)        unordered(x, y)
64#endif
65
66#if defined(__sun__) && !defined(CONFIG_NEEDS_LIBSUNMATH)
67
68#ifndef isnan
69# define isnan(x) \
70    (sizeof (x) == sizeof (long double) ? isnan_ld (x) \
71     : sizeof (x) == sizeof (double) ? isnan_d (x) \
72     : isnan_f (x))
73static inline int isnan_f  (float       x) { return x != x; }
74static inline int isnan_d  (double      x) { return x != x; }
75static inline int isnan_ld (long double x) { return x != x; }
76#endif
77
78#ifndef isinf
79# define isinf(x) \
80    (sizeof (x) == sizeof (long double) ? isinf_ld (x) \
81     : sizeof (x) == sizeof (double) ? isinf_d (x) \
82     : isinf_f (x))
83static inline int isinf_f  (float       x) { return isnan (x - x); }
84static inline int isinf_d  (double      x) { return isnan (x - x); }
85static inline int isinf_ld (long double x) { return isnan (x - x); }
86#endif
87#endif
88
89typedef float float32;
90typedef double float64;
91#ifdef FLOATX80
92typedef long double floatx80;
93#endif
94
95typedef union {
96    float32 f;
97    uint32_t i;
98} float32u;
99typedef union {
100    float64 f;
101    uint64_t i;
102} float64u;
103#ifdef FLOATX80
104typedef union {
105    floatx80 f;
106    struct {
107        uint64_t low;
108        uint16_t high;
109    } i;
110} floatx80u;
111#endif
112
113/*----------------------------------------------------------------------------
114| Software IEC/IEEE floating-point rounding mode.
115*----------------------------------------------------------------------------*/
116#if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
117    || defined(CONFIG_SOLARIS)
118#if defined(__OpenBSD__)
119#define FE_RM FP_RM
120#define FE_RP FP_RP
121#define FE_RZ FP_RZ
122#endif
123enum {
124    float_round_nearest_even = FP_RN,
125    float_round_down         = FP_RM,
126    float_round_up           = FP_RP,
127    float_round_to_zero      = FP_RZ
128};
129#else
130enum {
131    float_round_nearest_even = FE_TONEAREST,
132    float_round_down         = FE_DOWNWARD,
133    float_round_up           = FE_UPWARD,
134    float_round_to_zero      = FE_TOWARDZERO
135};
136#endif
137
138typedef struct float_status {
139    int float_rounding_mode;
140#ifdef FLOATX80
141    int floatx80_rounding_precision;
142#endif
143} float_status;
144
145void set_float_rounding_mode(int val STATUS_PARAM);
146#ifdef FLOATX80
147void set_floatx80_rounding_precision(int val STATUS_PARAM);
148#endif
149
150/*----------------------------------------------------------------------------
151| Software IEC/IEEE integer-to-floating-point conversion routines.
152*----------------------------------------------------------------------------*/
153float32 int32_to_float32( int STATUS_PARAM);
154float32 uint32_to_float32( unsigned int STATUS_PARAM);
155float64 int32_to_float64( int STATUS_PARAM);
156float64 uint32_to_float64( unsigned int STATUS_PARAM);
157#ifdef FLOATX80
158floatx80 int32_to_floatx80( int STATUS_PARAM);
159#endif
160#ifdef FLOAT128
161float128 int32_to_float128( int STATUS_PARAM);
162#endif
163float32 int64_to_float32( int64_t STATUS_PARAM);
164float32 uint64_to_float32( uint64_t STATUS_PARAM);
165float64 int64_to_float64( int64_t STATUS_PARAM);
166float64 uint64_to_float64( uint64_t v STATUS_PARAM);
167#ifdef FLOATX80
168floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
169#endif
170#ifdef FLOAT128
171float128 int64_to_float128( int64_t STATUS_PARAM);
172#endif
173
174/*----------------------------------------------------------------------------
175| Software IEC/IEEE single-precision conversion routines.
176*----------------------------------------------------------------------------*/
177int float32_to_int32( float32  STATUS_PARAM);
178int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
179unsigned int float32_to_uint32( float32 a STATUS_PARAM);
180unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
181int64_t float32_to_int64( float32  STATUS_PARAM);
182int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
183float64 float32_to_float64( float32  STATUS_PARAM);
184#ifdef FLOATX80
185floatx80 float32_to_floatx80( float32  STATUS_PARAM);
186#endif
187#ifdef FLOAT128
188float128 float32_to_float128( float32  STATUS_PARAM);
189#endif
190
191/*----------------------------------------------------------------------------
192| Software IEC/IEEE single-precision operations.
193*----------------------------------------------------------------------------*/
194float32 float32_round_to_int( float32  STATUS_PARAM);
195INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
196{
197    return a + b;
198}
199INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
200{
201    return a - b;
202}
203INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
204{
205    return a * b;
206}
207INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
208{
209    return a / b;
210}
211float32 float32_rem( float32, float32  STATUS_PARAM);
212float32 float32_sqrt( float32  STATUS_PARAM);
213INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
214{
215    return a == b;
216}
217INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
218{
219    return a <= b;
220}
221INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
222{
223    return a < b;
224}
225INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
226{
227    return a <= b && a >= b;
228}
229INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
230{
231    return islessequal(a, b);
232}
233INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
234{
235    return isless(a, b);
236}
237INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
238{
239    return isunordered(a, b);
240
241}
242int float32_compare( float32, float32 STATUS_PARAM );
243int float32_compare_quiet( float32, float32 STATUS_PARAM );
244int float32_is_signaling_nan( float32 );
245int float32_is_nan( float32 );
246
247INLINE float32 float32_abs(float32 a)
248{
249    return fabsf(a);
250}
251
252INLINE float32 float32_chs(float32 a)
253{
254    return -a;
255}
256
257INLINE float32 float32_is_infinity(float32 a)
258{
259    return fpclassify(a) == FP_INFINITE;
260}
261
262INLINE float32 float32_is_neg(float32 a)
263{
264    float32u u;
265    u.f = a;
266    return u.i >> 31;
267}
268
269INLINE float32 float32_is_zero(float32 a)
270{
271    return fpclassify(a) == FP_ZERO;
272}
273
274INLINE float32 float32_scalbn(float32 a, int n)
275{
276    return scalbnf(a, n);
277}
278
279/*----------------------------------------------------------------------------
280| Software IEC/IEEE double-precision conversion routines.
281*----------------------------------------------------------------------------*/
282int float64_to_int32( float64 STATUS_PARAM );
283int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
284unsigned int float64_to_uint32( float64 STATUS_PARAM );
285unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
286int64_t float64_to_int64( float64 STATUS_PARAM );
287int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
288uint64_t float64_to_uint64( float64 STATUS_PARAM );
289uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
290float32 float64_to_float32( float64 STATUS_PARAM );
291#ifdef FLOATX80
292floatx80 float64_to_floatx80( float64 STATUS_PARAM );
293#endif
294#ifdef FLOAT128
295float128 float64_to_float128( float64 STATUS_PARAM );
296#endif
297
298/*----------------------------------------------------------------------------
299| Software IEC/IEEE double-precision operations.
300*----------------------------------------------------------------------------*/
301float64 float64_round_to_int( float64 STATUS_PARAM );
302float64 float64_trunc_to_int( float64 STATUS_PARAM );
303INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
304{
305    return a + b;
306}
307INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
308{
309    return a - b;
310}
311INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
312{
313    return a * b;
314}
315INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
316{
317    return a / b;
318}
319float64 float64_rem( float64, float64 STATUS_PARAM );
320float64 float64_sqrt( float64 STATUS_PARAM );
321INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
322{
323    return a == b;
324}
325INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
326{
327    return a <= b;
328}
329INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
330{
331    return a < b;
332}
333INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
334{
335    return a <= b && a >= b;
336}
337INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
338{
339    return islessequal(a, b);
340}
341INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
342{
343    return isless(a, b);
344
345}
346INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
347{
348    return isunordered(a, b);
349
350}
351int float64_compare( float64, float64 STATUS_PARAM );
352int float64_compare_quiet( float64, float64 STATUS_PARAM );
353int float64_is_signaling_nan( float64 );
354int float64_is_nan( float64 );
355
356INLINE float64 float64_abs(float64 a)
357{
358    return fabs(a);
359}
360
361INLINE float64 float64_chs(float64 a)
362{
363    return -a;
364}
365
366INLINE float64 float64_is_infinity(float64 a)
367{
368    return fpclassify(a) == FP_INFINITE;
369}
370
371INLINE float64 float64_is_neg(float64 a)
372{
373    float64u u;
374    u.f = a;
375    return u.i >> 63;
376}
377
378INLINE float64 float64_is_zero(float64 a)
379{
380    return fpclassify(a) == FP_ZERO;
381}
382
383INLINE float64 float64_scalbn(float64 a, int n)
384{
385    return scalbn(a, n);
386}
387
388#ifdef FLOATX80
389
390/*----------------------------------------------------------------------------
391| Software IEC/IEEE extended double-precision conversion routines.
392*----------------------------------------------------------------------------*/
393int floatx80_to_int32( floatx80 STATUS_PARAM );
394int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
395int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
396int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
397float32 floatx80_to_float32( floatx80 STATUS_PARAM );
398float64 floatx80_to_float64( floatx80 STATUS_PARAM );
399#ifdef FLOAT128
400float128 floatx80_to_float128( floatx80 STATUS_PARAM );
401#endif
402
403/*----------------------------------------------------------------------------
404| Software IEC/IEEE extended double-precision operations.
405*----------------------------------------------------------------------------*/
406floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
407INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
408{
409    return a + b;
410}
411INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
412{
413    return a - b;
414}
415INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
416{
417    return a * b;
418}
419INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
420{
421    return a / b;
422}
423floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
424floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
425INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
426{
427    return a == b;
428}
429INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
430{
431    return a <= b;
432}
433INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
434{
435    return a < b;
436}
437INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
438{
439    return a <= b && a >= b;
440}
441INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
442{
443    return islessequal(a, b);
444}
445INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
446{
447    return isless(a, b);
448
449}
450INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
451{
452    return isunordered(a, b);
453
454}
455int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
456int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
457int floatx80_is_signaling_nan( floatx80 );
458int floatx80_is_nan( floatx80 );
459
460INLINE floatx80 floatx80_abs(floatx80 a)
461{
462    return fabsl(a);
463}
464
465INLINE floatx80 floatx80_chs(floatx80 a)
466{
467    return -a;
468}
469
470INLINE floatx80 floatx80_is_infinity(floatx80 a)
471{
472    return fpclassify(a) == FP_INFINITE;
473}
474
475INLINE floatx80 floatx80_is_neg(floatx80 a)
476{
477    floatx80u u;
478    u.f = a;
479    return u.i.high >> 15;
480}
481
482INLINE floatx80 floatx80_is_zero(floatx80 a)
483{
484    return fpclassify(a) == FP_ZERO;
485}
486
487INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
488{
489    return scalbnl(a, n);
490}
491
492#endif
493