softfloat-native.h revision c27f813900a3c114562efbb8df1065e94766fc48 
1/* Native implementation of soft float functions */
2#include <math.h>
3
4#if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
5#include <ieeefp.h>
6#define fabsf(f) ((float)fabs(f))
7#else
8#include <fenv.h>
9#endif
10
11#ifdef __OpenBSD__
12/* Get OpenBSD version number */
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(HOST_SOLARIS) && (( HOST_SOLARIS <= 9 ) || ((HOST_SOLARIS >= 10) \
24                                                        && (__GNUC__ <= 4))) \
25    || (defined(__OpenBSD__) && (OpenBSD < 200811))
26/*
27 * C99 7.12.3 classification macros
28 * and
29 * C99 7.12.14 comparison macros
30 *
31 * ... do not work on Solaris 10 using GNU CC 3.4.x.
32 * Try to workaround the missing / broken C99 math macros.
33 */
34#if defined(__OpenBSD__)
35#define unordered(x, y) (isnan(x) || isnan(y))
36#endif
37
38#define isnormal(x)             (fpclass(x) >= FP_NZERO)
39#define isgreater(x, y)         ((!unordered(x, y)) && ((x) > (y)))
40#define isgreaterequal(x, y)    ((!unordered(x, y)) && ((x) >= (y)))
41#define isless(x, y)            ((!unordered(x, y)) && ((x) < (y)))
42#define islessequal(x, y)       ((!unordered(x, y)) && ((x) <= (y)))
43#define isunordered(x,y)        unordered(x, y)
44#endif
45
46#if defined(__sun__) && !defined(NEED_LIBSUNMATH)
47
48#ifndef isnan
49# define isnan(x) \
50    (sizeof (x) == sizeof (long double) ? isnan_ld (x) \
51     : sizeof (x) == sizeof (double) ? isnan_d (x) \
52     : isnan_f (x))
53static inline int isnan_f  (float       x) { return x != x; }
54static inline int isnan_d  (double      x) { return x != x; }
55static inline int isnan_ld (long double x) { return x != x; }
56#endif
57
58#ifndef isinf
59# define isinf(x) \
60    (sizeof (x) == sizeof (long double) ? isinf_ld (x) \
61     : sizeof (x) == sizeof (double) ? isinf_d (x) \
62     : isinf_f (x))
63static inline int isinf_f  (float       x) { return isnan (x - x); }
64static inline int isinf_d  (double      x) { return isnan (x - x); }
65static inline int isinf_ld (long double x) { return isnan (x - x); }
66#endif
67#endif
68
69typedef float float32;
70typedef double float64;
71#ifdef FLOATX80
72typedef long double floatx80;
73#endif
74
75typedef union {
76    float32 f;
77    uint32_t i;
78} float32u;
79typedef union {
80    float64 f;
81    uint64_t i;
82} float64u;
83#ifdef FLOATX80
84typedef union {
85    floatx80 f;
86    struct {
87        uint64_t low;
88        uint16_t high;
89    } i;
90} floatx80u;
91#endif
92
93/*----------------------------------------------------------------------------
94| Software IEC/IEEE floating-point rounding mode.
95*----------------------------------------------------------------------------*/
96#if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
97#if defined(__OpenBSD__)
98#define FE_RM FP_RM
99#define FE_RP FP_RP
100#define FE_RZ FP_RZ
101#endif
102enum {
103    float_round_nearest_even = FP_RN,
104    float_round_down         = FP_RM,
105    float_round_up           = FP_RP,
106    float_round_to_zero      = FP_RZ
107};
108#elif defined(__arm__)
109enum {
110    float_round_nearest_even = 0,
111    float_round_down         = 1,
112    float_round_up           = 2,
113    float_round_to_zero      = 3
114};
115#else
116enum {
117    float_round_nearest_even = FE_TONEAREST,
118    float_round_down         = FE_DOWNWARD,
119    float_round_up           = FE_UPWARD,
120    float_round_to_zero      = FE_TOWARDZERO
121};
122#endif
123
124typedef struct float_status {
125    signed char float_rounding_mode;
126#ifdef FLOATX80
127    signed char floatx80_rounding_precision;
128#endif
129} float_status;
130
131void set_float_rounding_mode(int val STATUS_PARAM);
132#ifdef FLOATX80
133void set_floatx80_rounding_precision(int val STATUS_PARAM);
134#endif
135
136/*----------------------------------------------------------------------------
137| Software IEC/IEEE integer-to-floating-point conversion routines.
138*----------------------------------------------------------------------------*/
139float32 int32_to_float32( int STATUS_PARAM);
140float32 uint32_to_float32( unsigned int STATUS_PARAM);
141float64 int32_to_float64( int STATUS_PARAM);
142float64 uint32_to_float64( unsigned int STATUS_PARAM);
143#ifdef FLOATX80
144floatx80 int32_to_floatx80( int STATUS_PARAM);
145#endif
146#ifdef FLOAT128
147float128 int32_to_float128( int STATUS_PARAM);
148#endif
149float32 int64_to_float32( int64_t STATUS_PARAM);
150float32 uint64_to_float32( uint64_t STATUS_PARAM);
151float64 int64_to_float64( int64_t STATUS_PARAM);
152float64 uint64_to_float64( uint64_t v STATUS_PARAM);
153#ifdef FLOATX80
154floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
155#endif
156#ifdef FLOAT128
157float128 int64_to_float128( int64_t STATUS_PARAM);
158#endif
159
160/*----------------------------------------------------------------------------
161| Software IEC/IEEE single-precision conversion routines.
162*----------------------------------------------------------------------------*/
163int float32_to_int32( float32  STATUS_PARAM);
164int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
165unsigned int float32_to_uint32( float32 a STATUS_PARAM);
166unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
167int64_t float32_to_int64( float32  STATUS_PARAM);
168int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
169float64 float32_to_float64( float32  STATUS_PARAM);
170#ifdef FLOATX80
171floatx80 float32_to_floatx80( float32  STATUS_PARAM);
172#endif
173#ifdef FLOAT128
174float128 float32_to_float128( float32  STATUS_PARAM);
175#endif
176
177/*----------------------------------------------------------------------------
178| Software IEC/IEEE single-precision operations.
179*----------------------------------------------------------------------------*/
180float32 float32_round_to_int( float32  STATUS_PARAM);
181INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
182{
183    return a + b;
184}
185INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
186{
187    return a - b;
188}
189INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
190{
191    return a * b;
192}
193INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
194{
195    return a / b;
196}
197float32 float32_rem( float32, float32  STATUS_PARAM);
198float32 float32_sqrt( float32  STATUS_PARAM);
199INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
200{
201    return a == b;
202}
203INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
204{
205    return a <= b;
206}
207INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
208{
209    return a < b;
210}
211INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
212{
213    return a <= b && a >= b;
214}
215INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
216{
217    return islessequal(a, b);
218}
219INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
220{
221    return isless(a, b);
222}
223INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
224{
225    return isunordered(a, b);
226
227}
228int float32_compare( float32, float32 STATUS_PARAM );
229int float32_compare_quiet( float32, float32 STATUS_PARAM );
230int float32_is_signaling_nan( float32 );
231
232INLINE float32 float32_abs(float32 a)
233{
234    return fabsf(a);
235}
236
237INLINE float32 float32_chs(float32 a)
238{
239    return -a;
240}
241
242INLINE float32 float32_scalbn(float32 a, int n)
243{
244    return scalbnf(a, n);
245}
246
247/*----------------------------------------------------------------------------
248| Software IEC/IEEE double-precision conversion routines.
249*----------------------------------------------------------------------------*/
250int float64_to_int32( float64 STATUS_PARAM );
251int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
252unsigned int float64_to_uint32( float64 STATUS_PARAM );
253unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
254int64_t float64_to_int64( float64 STATUS_PARAM );
255int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
256uint64_t float64_to_uint64( float64 STATUS_PARAM );
257uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
258float32 float64_to_float32( float64 STATUS_PARAM );
259#ifdef FLOATX80
260floatx80 float64_to_floatx80( float64 STATUS_PARAM );
261#endif
262#ifdef FLOAT128
263float128 float64_to_float128( float64 STATUS_PARAM );
264#endif
265
266/*----------------------------------------------------------------------------
267| Software IEC/IEEE double-precision operations.
268*----------------------------------------------------------------------------*/
269float64 float64_round_to_int( float64 STATUS_PARAM );
270float64 float64_trunc_to_int( float64 STATUS_PARAM );
271INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
272{
273    return a + b;
274}
275INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
276{
277    return a - b;
278}
279INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
280{
281    return a * b;
282}
283INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
284{
285    return a / b;
286}
287float64 float64_rem( float64, float64 STATUS_PARAM );
288float64 float64_sqrt( float64 STATUS_PARAM );
289INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
290{
291    return a == b;
292}
293INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
294{
295    return a <= b;
296}
297INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
298{
299    return a < b;
300}
301INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
302{
303    return a <= b && a >= b;
304}
305INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
306{
307    return islessequal(a, b);
308}
309INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
310{
311    return isless(a, b);
312
313}
314INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
315{
316    return isunordered(a, b);
317
318}
319int float64_compare( float64, float64 STATUS_PARAM );
320int float64_compare_quiet( float64, float64 STATUS_PARAM );
321int float64_is_signaling_nan( float64 );
322int float64_is_nan( float64 );
323
324INLINE float64 float64_abs(float64 a)
325{
326    return fabs(a);
327}
328
329INLINE float64 float64_chs(float64 a)
330{
331    return -a;
332}
333
334INLINE float64 float64_scalbn(float64 a, int n)
335{
336    return scalbn(a, n);
337}
338
339#ifdef FLOATX80
340
341/*----------------------------------------------------------------------------
342| Software IEC/IEEE extended double-precision conversion routines.
343*----------------------------------------------------------------------------*/
344int floatx80_to_int32( floatx80 STATUS_PARAM );
345int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
346int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
347int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
348float32 floatx80_to_float32( floatx80 STATUS_PARAM );
349float64 floatx80_to_float64( floatx80 STATUS_PARAM );
350#ifdef FLOAT128
351float128 floatx80_to_float128( floatx80 STATUS_PARAM );
352#endif
353
354/*----------------------------------------------------------------------------
355| Software IEC/IEEE extended double-precision operations.
356*----------------------------------------------------------------------------*/
357floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
358INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
359{
360    return a + b;
361}
362INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
363{
364    return a - b;
365}
366INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
367{
368    return a * b;
369}
370INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
371{
372    return a / b;
373}
374floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
375floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
376INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
377{
378    return a == b;
379}
380INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
381{
382    return a <= b;
383}
384INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
385{
386    return a < b;
387}
388INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
389{
390    return a <= b && a >= b;
391}
392INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
393{
394    return islessequal(a, b);
395}
396INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
397{
398    return isless(a, b);
399
400}
401INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
402{
403    return isunordered(a, b);
404
405}
406int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
407int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
408int floatx80_is_signaling_nan( floatx80 );
409
410INLINE floatx80 floatx80_abs(floatx80 a)
411{
412    return fabsl(a);
413}
414
415INLINE floatx80 floatx80_chs(floatx80 a)
416{
417    return -a;
418}
419
420INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
421{
422    return scalbnl(a, n);
423}
424
425#endif
426