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source: vbox/trunk/src/recompiler/fpu/softfloat-native.h@ 37675

Last change on this file since 37675 was 37675, checked in by vboxsync, 14 years ago

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Line 
1/* Native implementation of soft float functions */
2#include <math.h>
3
4#if (defined(_BSD) && !defined(__APPLE__) && !defined(__FreeBSD__)) || defined(HOST_SOLARIS) /* VBox: Added __FreeBSD__ */
5#include <ieeefp.h>
6#define fabsf(f) ((float)fabs(f))
7#else
8#include <fenv.h>
9#endif
10
11#if defined(__OpenBSD__) || defined(__NetBSD__)
12#include <sys/param.h>
13#endif
14
15/*
16 * Define some C99-7.12.3 classification macros and
17 * some C99-.12.4 for Solaris systems OS less than 10,
18 * or Solaris 10 systems running GCC 3.x or less.
19 * Solaris 10 with GCC4 does not need these macros as they
20 * are defined in <iso/math_c99.h> with a compiler directive
21 */
22#if defined(CONFIG_SOLARIS) && \
23 ((CONFIG_SOLARIS_VERSION <= 9 ) || \
24 ((CONFIG_SOLARIS_VERSION >= 10) && (__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#ifdef __NetBSD__
39#ifndef isgreater
40#define isgreater(x, y) __builtin_isgreater(x, y)
41#endif
42#ifndef isgreaterequal
43#define isgreaterequal(x, y) __builtin_isgreaterequal(x, y)
44#endif
45#ifndef isless
46#define isless(x, y) __builtin_isless(x, y)
47#endif
48#ifndef islessequal
49#define islessequal(x, y) __builtin_islessequal(x, y)
50#endif
51#ifndef isunordered
52#define isunordered(x, y) __builtin_isunordered(x, y)
53#endif
54#endif
55
56
57#define isnormal(x) (fpclass(x) >= FP_NZERO)
58#define isgreater(x, y) ((!unordered(x, y)) && ((x) > (y)))
59#define isgreaterequal(x, y) ((!unordered(x, y)) && ((x) >= (y)))
60#define isless(x, y) ((!unordered(x, y)) && ((x) < (y)))
61#define islessequal(x, y) ((!unordered(x, y)) && ((x) <= (y)))
62#define isunordered(x,y) unordered(x, y)
63#endif
64
65#if defined(__sun__) && !defined(CONFIG_NEEDS_LIBSUNMATH)
66
67#ifndef isnan
68# define isnan(x) \
69 (sizeof (x) == sizeof (long double) ? isnan_ld (x) \
70 : sizeof (x) == sizeof (double) ? isnan_d (x) \
71 : isnan_f (x))
72static inline int isnan_f (float x) { return x != x; }
73static inline int isnan_d (double x) { return x != x; }
74static inline int isnan_ld (long double x) { return x != x; }
75#endif
76
77#ifndef isinf
78# define isinf(x) \
79 (sizeof (x) == sizeof (long double) ? isinf_ld (x) \
80 : sizeof (x) == sizeof (double) ? isinf_d (x) \
81 : isinf_f (x))
82static inline int isinf_f (float x) { return isnan (x - x); }
83static inline int isinf_d (double x) { return isnan (x - x); }
84static inline int isinf_ld (long double x) { return isnan (x - x); }
85#endif
86#endif
87
88typedef float float32;
89typedef double float64;
90#ifdef FLOATX80
91typedef long double floatx80;
92#endif
93
94typedef union {
95 float32 f;
96 uint32_t i;
97} float32u;
98typedef union {
99 float64 f;
100 uint64_t i;
101} float64u;
102#ifdef FLOATX80
103typedef union {
104 floatx80 f;
105 struct {
106 uint64_t low;
107 uint16_t high;
108 } i;
109} floatx80u;
110#endif
111
112/*----------------------------------------------------------------------------
113| Software IEC/IEEE floating-point rounding mode.
114*----------------------------------------------------------------------------*/
115#if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
116 || defined(CONFIG_SOLARIS)
117#if defined(__OpenBSD__)
118#define FE_RM FP_RM
119#define FE_RP FP_RP
120#define FE_RZ FP_RZ
121#endif
122enum {
123 float_round_nearest_even = FP_RN,
124 float_round_down = FP_RM,
125 float_round_up = FP_RP,
126 float_round_to_zero = FP_RZ
127};
128#elif defined(__arm__)
129enum {
130 float_round_nearest_even = 0,
131 float_round_down = 1,
132 float_round_up = 2,
133 float_round_to_zero = 3
134};
135#else
136enum {
137 float_round_nearest_even = FE_TONEAREST,
138 float_round_down = FE_DOWNWARD,
139 float_round_up = FE_UPWARD,
140 float_round_to_zero = FE_TOWARDZERO
141};
142#endif
143
144typedef struct float_status {
145 int float_rounding_mode;
146#ifdef FLOATX80
147 int floatx80_rounding_precision;
148#endif
149} float_status;
150
151void set_float_rounding_mode(int val STATUS_PARAM);
152#ifdef FLOATX80
153void set_floatx80_rounding_precision(int val STATUS_PARAM);
154#endif
155
156/*----------------------------------------------------------------------------
157| Software IEC/IEEE integer-to-floating-point conversion routines.
158*----------------------------------------------------------------------------*/
159float32 int32_to_float32( int STATUS_PARAM);
160float32 uint32_to_float32( unsigned int STATUS_PARAM);
161float64 int32_to_float64( int STATUS_PARAM);
162float64 uint32_to_float64( unsigned int STATUS_PARAM);
163#ifdef FLOATX80
164floatx80 int32_to_floatx80( int STATUS_PARAM);
165#endif
166#ifdef FLOAT128
167float128 int32_to_float128( int STATUS_PARAM);
168#endif
169float32 int64_to_float32( int64_t STATUS_PARAM);
170float32 uint64_to_float32( uint64_t STATUS_PARAM);
171float64 int64_to_float64( int64_t STATUS_PARAM);
172float64 uint64_to_float64( uint64_t v STATUS_PARAM);
173#ifdef FLOATX80
174floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
175#endif
176#ifdef FLOAT128
177float128 int64_to_float128( int64_t STATUS_PARAM);
178#endif
179
180/*----------------------------------------------------------------------------
181| Software IEC/IEEE single-precision conversion routines.
182*----------------------------------------------------------------------------*/
183int float32_to_int32( float32 STATUS_PARAM);
184int float32_to_int32_round_to_zero( float32 STATUS_PARAM);
185unsigned int float32_to_uint32( float32 a STATUS_PARAM);
186unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
187int64_t float32_to_int64( float32 STATUS_PARAM);
188int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM);
189float64 float32_to_float64( float32 STATUS_PARAM);
190#ifdef FLOATX80
191floatx80 float32_to_floatx80( float32 STATUS_PARAM);
192#endif
193#ifdef FLOAT128
194float128 float32_to_float128( float32 STATUS_PARAM);
195#endif
196
197/*----------------------------------------------------------------------------
198| Software IEC/IEEE single-precision operations.
199*----------------------------------------------------------------------------*/
200float32 float32_round_to_int( float32 STATUS_PARAM);
201INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
202{
203 return a + b;
204}
205INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
206{
207 return a - b;
208}
209INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
210{
211 return a * b;
212}
213INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
214{
215 return a / b;
216}
217float32 float32_rem( float32, float32 STATUS_PARAM);
218float32 float32_sqrt( float32 STATUS_PARAM);
219INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
220{
221 return a == b;
222}
223INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
224{
225 return a <= b;
226}
227INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
228{
229 return a < b;
230}
231INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
232{
233 return a <= b && a >= b;
234}
235INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
236{
237 return islessequal(a, b);
238}
239INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
240{
241 return isless(a, b);
242}
243INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
244{
245 return isunordered(a, b);
246
247}
248int float32_compare( float32, float32 STATUS_PARAM );
249int float32_compare_quiet( float32, float32 STATUS_PARAM );
250int float32_is_signaling_nan( float32 );
251int float32_is_nan( float32 );
252
253INLINE float32 float32_abs(float32 a)
254{
255 return fabsf(a);
256}
257
258INLINE float32 float32_chs(float32 a)
259{
260 return -a;
261}
262
263INLINE float32 float32_is_infinity(float32 a)
264{
265 return fpclassify(a) == FP_INFINITE;
266}
267
268INLINE float32 float32_is_neg(float32 a)
269{
270 float32u u;
271 u.f = a;
272 return u.i >> 31;
273}
274
275INLINE float32 float32_is_zero(float32 a)
276{
277 return fpclassify(a) == FP_ZERO;
278}
279
280INLINE float32 float32_scalbn(float32 a, int n)
281{
282 return scalbnf(a, n);
283}
284
285/*----------------------------------------------------------------------------
286| Software IEC/IEEE double-precision conversion routines.
287*----------------------------------------------------------------------------*/
288int float64_to_int32( float64 STATUS_PARAM );
289int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
290unsigned int float64_to_uint32( float64 STATUS_PARAM );
291unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
292int64_t float64_to_int64( float64 STATUS_PARAM );
293int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
294uint64_t float64_to_uint64( float64 STATUS_PARAM );
295uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
296float32 float64_to_float32( float64 STATUS_PARAM );
297#ifdef FLOATX80
298floatx80 float64_to_floatx80( float64 STATUS_PARAM );
299#endif
300#ifdef FLOAT128
301float128 float64_to_float128( float64 STATUS_PARAM );
302#endif
303
304/*----------------------------------------------------------------------------
305| Software IEC/IEEE double-precision operations.
306*----------------------------------------------------------------------------*/
307float64 float64_round_to_int( float64 STATUS_PARAM );
308float64 float64_trunc_to_int( float64 STATUS_PARAM );
309INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
310{
311 return a + b;
312}
313INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
314{
315 return a - b;
316}
317INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
318{
319 return a * b;
320}
321INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
322{
323 return a / b;
324}
325float64 float64_rem( float64, float64 STATUS_PARAM );
326float64 float64_sqrt( float64 STATUS_PARAM );
327INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
328{
329 return a == b;
330}
331INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
332{
333 return a <= b;
334}
335INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
336{
337 return a < b;
338}
339INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
340{
341 return a <= b && a >= b;
342}
343INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
344{
345 return islessequal(a, b);
346}
347INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
348{
349 return isless(a, b);
350
351}
352INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
353{
354 return isunordered(a, b);
355
356}
357int float64_compare( float64, float64 STATUS_PARAM );
358int float64_compare_quiet( float64, float64 STATUS_PARAM );
359int float64_is_signaling_nan( float64 );
360int float64_is_nan( float64 );
361
362INLINE float64 float64_abs(float64 a)
363{
364 return fabs(a);
365}
366
367INLINE float64 float64_chs(float64 a)
368{
369 return -a;
370}
371
372INLINE float64 float64_is_infinity(float64 a)
373{
374 return fpclassify(a) == FP_INFINITE;
375}
376
377INLINE float64 float64_is_neg(float64 a)
378{
379 float64u u;
380 u.f = a;
381 return u.i >> 63;
382}
383
384INLINE float64 float64_is_zero(float64 a)
385{
386 return fpclassify(a) == FP_ZERO;
387}
388
389INLINE float64 float64_scalbn(float64 a, int n)
390{
391 return scalbn(a, n);
392}
393
394#ifdef FLOATX80
395
396/*----------------------------------------------------------------------------
397| Software IEC/IEEE extended double-precision conversion routines.
398*----------------------------------------------------------------------------*/
399int floatx80_to_int32( floatx80 STATUS_PARAM );
400int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
401int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
402int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
403float32 floatx80_to_float32( floatx80 STATUS_PARAM );
404float64 floatx80_to_float64( floatx80 STATUS_PARAM );
405#ifdef FLOAT128
406float128 floatx80_to_float128( floatx80 STATUS_PARAM );
407#endif
408
409/*----------------------------------------------------------------------------
410| Software IEC/IEEE extended double-precision operations.
411*----------------------------------------------------------------------------*/
412floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
413INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
414{
415 return a + b;
416}
417INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
418{
419 return a - b;
420}
421INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
422{
423 return a * b;
424}
425INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
426{
427 return a / b;
428}
429floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
430floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
431INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
432{
433 return a == b;
434}
435INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
436{
437 return a <= b;
438}
439INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
440{
441 return a < b;
442}
443INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
444{
445 return a <= b && a >= b;
446}
447INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
448{
449 return islessequal(a, b);
450}
451INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
452{
453 return isless(a, b);
454
455}
456INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
457{
458 return isunordered(a, b);
459
460}
461int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
462int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
463int floatx80_is_signaling_nan( floatx80 );
464int floatx80_is_nan( floatx80 );
465
466INLINE floatx80 floatx80_abs(floatx80 a)
467{
468 return fabsl(a);
469}
470
471INLINE floatx80 floatx80_chs(floatx80 a)
472{
473 return -a;
474}
475
476INLINE floatx80 floatx80_is_infinity(floatx80 a)
477{
478 return fpclassify(a) == FP_INFINITE;
479}
480
481INLINE floatx80 floatx80_is_neg(floatx80 a)
482{
483 floatx80u u;
484 u.f = a;
485 return u.i.high >> 15;
486}
487
488INLINE floatx80 floatx80_is_zero(floatx80 a)
489{
490 return fpclassify(a) == FP_ZERO;
491}
492
493INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
494{
495 return scalbnl(a, n);
496}
497
498#endif
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