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1.1 root 1: /* Native implementation of soft float functions */
2: #include <math.h>
1.1.1.2 root 3:
1.1.1.7 ! root 4: #if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
! 5: || defined(CONFIG_SOLARIS)
1.1 root 6: #include <ieeefp.h>
1.1.1.2 root 7: #define fabsf(f) ((float)fabs(f))
1.1 root 8: #else
9: #include <fenv.h>
10: #endif
11:
1.1.1.5 root 12: #if defined(__OpenBSD__) || defined(__NetBSD__)
13: #include <sys/param.h>
14: #endif
15:
1.1.1.2 root 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: */
1.1.1.7 ! root 23: #if defined(CONFIG_SOLARIS) && \
! 24: ((CONFIG_SOLARIS_VERSION <= 9 ) || \
! 25: ((CONFIG_SOLARIS_VERSION >= 10) && (__GNUC__ < 4))) \
1.1.1.5 root 26: || (defined(__OpenBSD__) && (OpenBSD < 200811))
1.1.1.2 root 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: */
1.1.1.5 root 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:
1.1.1.2 root 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:
1.1.1.7 ! root 66: #if defined(__sun__) && !defined(CONFIG_NEEDS_LIBSUNMATH)
1.1.1.4 root 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))
73: static inline int isnan_f (float x) { return x != x; }
74: static inline int isnan_d (double x) { return x != x; }
75: static 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))
83: static inline int isinf_f (float x) { return isnan (x - x); }
84: static inline int isinf_d (double x) { return isnan (x - x); }
85: static inline int isinf_ld (long double x) { return isnan (x - x); }
86: #endif
87: #endif
88:
1.1 root 89: typedef float float32;
90: typedef double float64;
91: #ifdef FLOATX80
92: typedef long double floatx80;
93: #endif
94:
95: typedef union {
96: float32 f;
97: uint32_t i;
98: } float32u;
99: typedef union {
100: float64 f;
101: uint64_t i;
102: } float64u;
103: #ifdef FLOATX80
104: typedef 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: *----------------------------------------------------------------------------*/
1.1.1.7 ! root 116: #if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
! 117: || defined(CONFIG_SOLARIS)
1.1.1.5 root 118: #if defined(__OpenBSD__)
119: #define FE_RM FP_RM
120: #define FE_RP FP_RP
121: #define FE_RZ FP_RZ
122: #endif
1.1 root 123: enum {
124: float_round_nearest_even = FP_RN,
1.1.1.2 root 125: float_round_down = FP_RM,
126: float_round_up = FP_RP,
127: float_round_to_zero = FP_RZ
1.1 root 128: };
129: #elif defined(__arm__)
130: enum {
131: float_round_nearest_even = 0,
132: float_round_down = 1,
133: float_round_up = 2,
134: float_round_to_zero = 3
135: };
136: #else
137: enum {
138: float_round_nearest_even = FE_TONEAREST,
139: float_round_down = FE_DOWNWARD,
140: float_round_up = FE_UPWARD,
141: float_round_to_zero = FE_TOWARDZERO
142: };
143: #endif
144:
145: typedef struct float_status {
1.1.1.5 root 146: int float_rounding_mode;
1.1 root 147: #ifdef FLOATX80
1.1.1.5 root 148: int floatx80_rounding_precision;
1.1 root 149: #endif
150: } float_status;
151:
152: void set_float_rounding_mode(int val STATUS_PARAM);
153: #ifdef FLOATX80
154: void set_floatx80_rounding_precision(int val STATUS_PARAM);
155: #endif
156:
157: /*----------------------------------------------------------------------------
158: | Software IEC/IEEE integer-to-floating-point conversion routines.
159: *----------------------------------------------------------------------------*/
160: float32 int32_to_float32( int STATUS_PARAM);
1.1.1.4 root 161: float32 uint32_to_float32( unsigned int STATUS_PARAM);
1.1 root 162: float64 int32_to_float64( int STATUS_PARAM);
1.1.1.4 root 163: float64 uint32_to_float64( unsigned int STATUS_PARAM);
1.1 root 164: #ifdef FLOATX80
165: floatx80 int32_to_floatx80( int STATUS_PARAM);
166: #endif
167: #ifdef FLOAT128
168: float128 int32_to_float128( int STATUS_PARAM);
169: #endif
170: float32 int64_to_float32( int64_t STATUS_PARAM);
1.1.1.4 root 171: float32 uint64_to_float32( uint64_t STATUS_PARAM);
1.1 root 172: float64 int64_to_float64( int64_t STATUS_PARAM);
1.1.1.4 root 173: float64 uint64_to_float64( uint64_t v STATUS_PARAM);
1.1 root 174: #ifdef FLOATX80
175: floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
176: #endif
177: #ifdef FLOAT128
178: float128 int64_to_float128( int64_t STATUS_PARAM);
179: #endif
180:
181: /*----------------------------------------------------------------------------
182: | Software IEC/IEEE single-precision conversion routines.
183: *----------------------------------------------------------------------------*/
184: int float32_to_int32( float32 STATUS_PARAM);
185: int float32_to_int32_round_to_zero( float32 STATUS_PARAM);
1.1.1.4 root 186: unsigned int float32_to_uint32( float32 a STATUS_PARAM);
187: unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
1.1 root 188: int64_t float32_to_int64( float32 STATUS_PARAM);
189: int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM);
190: float64 float32_to_float64( float32 STATUS_PARAM);
191: #ifdef FLOATX80
192: floatx80 float32_to_floatx80( float32 STATUS_PARAM);
193: #endif
194: #ifdef FLOAT128
195: float128 float32_to_float128( float32 STATUS_PARAM);
196: #endif
197:
198: /*----------------------------------------------------------------------------
199: | Software IEC/IEEE single-precision operations.
200: *----------------------------------------------------------------------------*/
201: float32 float32_round_to_int( float32 STATUS_PARAM);
202: INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
203: {
204: return a + b;
205: }
206: INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
207: {
208: return a - b;
209: }
210: INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
211: {
212: return a * b;
213: }
214: INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
215: {
216: return a / b;
217: }
218: float32 float32_rem( float32, float32 STATUS_PARAM);
219: float32 float32_sqrt( float32 STATUS_PARAM);
1.1.1.3 root 220: INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
1.1 root 221: {
222: return a == b;
223: }
1.1.1.3 root 224: INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
1.1 root 225: {
226: return a <= b;
227: }
1.1.1.3 root 228: INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
1.1 root 229: {
230: return a < b;
231: }
1.1.1.3 root 232: INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
1.1 root 233: {
234: return a <= b && a >= b;
235: }
1.1.1.3 root 236: INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
1.1 root 237: {
238: return islessequal(a, b);
239: }
1.1.1.3 root 240: INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
1.1 root 241: {
242: return isless(a, b);
243: }
1.1.1.3 root 244: INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
1.1 root 245: {
246: return isunordered(a, b);
247:
248: }
1.1.1.3 root 249: int float32_compare( float32, float32 STATUS_PARAM );
250: int float32_compare_quiet( float32, float32 STATUS_PARAM );
251: int float32_is_signaling_nan( float32 );
1.1.1.5 root 252: int float32_is_nan( float32 );
1.1 root 253:
254: INLINE float32 float32_abs(float32 a)
255: {
256: return fabsf(a);
257: }
258:
259: INLINE float32 float32_chs(float32 a)
260: {
261: return -a;
262: }
263:
1.1.1.5 root 264: INLINE float32 float32_is_infinity(float32 a)
265: {
266: return fpclassify(a) == FP_INFINITE;
267: }
268:
269: INLINE float32 float32_is_neg(float32 a)
270: {
271: float32u u;
272: u.f = a;
273: return u.i >> 31;
274: }
275:
276: INLINE float32 float32_is_zero(float32 a)
277: {
278: return fpclassify(a) == FP_ZERO;
279: }
280:
1.1.1.4 root 281: INLINE float32 float32_scalbn(float32 a, int n)
282: {
283: return scalbnf(a, n);
284: }
285:
1.1 root 286: /*----------------------------------------------------------------------------
287: | Software IEC/IEEE double-precision conversion routines.
288: *----------------------------------------------------------------------------*/
289: int float64_to_int32( float64 STATUS_PARAM );
290: int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
1.1.1.4 root 291: unsigned int float64_to_uint32( float64 STATUS_PARAM );
292: unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
1.1 root 293: int64_t float64_to_int64( float64 STATUS_PARAM );
294: int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
1.1.1.4 root 295: uint64_t float64_to_uint64( float64 STATUS_PARAM );
296: uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
1.1 root 297: float32 float64_to_float32( float64 STATUS_PARAM );
298: #ifdef FLOATX80
299: floatx80 float64_to_floatx80( float64 STATUS_PARAM );
300: #endif
301: #ifdef FLOAT128
302: float128 float64_to_float128( float64 STATUS_PARAM );
303: #endif
304:
305: /*----------------------------------------------------------------------------
306: | Software IEC/IEEE double-precision operations.
307: *----------------------------------------------------------------------------*/
308: float64 float64_round_to_int( float64 STATUS_PARAM );
1.1.1.3 root 309: float64 float64_trunc_to_int( float64 STATUS_PARAM );
1.1 root 310: INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
311: {
312: return a + b;
313: }
314: INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
315: {
316: return a - b;
317: }
318: INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
319: {
320: return a * b;
321: }
322: INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
323: {
324: return a / b;
325: }
326: float64 float64_rem( float64, float64 STATUS_PARAM );
327: float64 float64_sqrt( float64 STATUS_PARAM );
1.1.1.3 root 328: INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
1.1 root 329: {
330: return a == b;
331: }
1.1.1.3 root 332: INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
1.1 root 333: {
334: return a <= b;
335: }
1.1.1.3 root 336: INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
1.1 root 337: {
338: return a < b;
339: }
1.1.1.3 root 340: INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
1.1 root 341: {
342: return a <= b && a >= b;
343: }
1.1.1.3 root 344: INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
1.1 root 345: {
346: return islessequal(a, b);
347: }
1.1.1.3 root 348: INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
1.1 root 349: {
350: return isless(a, b);
351:
352: }
1.1.1.3 root 353: INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
1.1 root 354: {
355: return isunordered(a, b);
356:
357: }
1.1.1.3 root 358: int float64_compare( float64, float64 STATUS_PARAM );
359: int float64_compare_quiet( float64, float64 STATUS_PARAM );
360: int float64_is_signaling_nan( float64 );
361: int float64_is_nan( float64 );
1.1 root 362:
363: INLINE float64 float64_abs(float64 a)
364: {
365: return fabs(a);
366: }
367:
368: INLINE float64 float64_chs(float64 a)
369: {
370: return -a;
371: }
372:
1.1.1.5 root 373: INLINE float64 float64_is_infinity(float64 a)
374: {
375: return fpclassify(a) == FP_INFINITE;
376: }
377:
378: INLINE float64 float64_is_neg(float64 a)
379: {
380: float64u u;
381: u.f = a;
382: return u.i >> 63;
383: }
384:
385: INLINE float64 float64_is_zero(float64 a)
386: {
387: return fpclassify(a) == FP_ZERO;
388: }
389:
1.1.1.4 root 390: INLINE float64 float64_scalbn(float64 a, int n)
391: {
392: return scalbn(a, n);
393: }
394:
1.1 root 395: #ifdef FLOATX80
396:
397: /*----------------------------------------------------------------------------
398: | Software IEC/IEEE extended double-precision conversion routines.
399: *----------------------------------------------------------------------------*/
400: int floatx80_to_int32( floatx80 STATUS_PARAM );
401: int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
402: int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
403: int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
404: float32 floatx80_to_float32( floatx80 STATUS_PARAM );
405: float64 floatx80_to_float64( floatx80 STATUS_PARAM );
406: #ifdef FLOAT128
407: float128 floatx80_to_float128( floatx80 STATUS_PARAM );
408: #endif
409:
410: /*----------------------------------------------------------------------------
411: | Software IEC/IEEE extended double-precision operations.
412: *----------------------------------------------------------------------------*/
413: floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
414: INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
415: {
416: return a + b;
417: }
418: INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
419: {
420: return a - b;
421: }
422: INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
423: {
424: return a * b;
425: }
426: INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
427: {
428: return a / b;
429: }
430: floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
431: floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
1.1.1.3 root 432: INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 433: {
434: return a == b;
435: }
1.1.1.3 root 436: INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 437: {
438: return a <= b;
439: }
1.1.1.3 root 440: INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 441: {
442: return a < b;
443: }
1.1.1.3 root 444: INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 445: {
446: return a <= b && a >= b;
447: }
1.1.1.3 root 448: INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 449: {
450: return islessequal(a, b);
451: }
1.1.1.3 root 452: INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 453: {
454: return isless(a, b);
455:
456: }
1.1.1.3 root 457: INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
1.1 root 458: {
459: return isunordered(a, b);
460:
461: }
1.1.1.3 root 462: int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
463: int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
464: int floatx80_is_signaling_nan( floatx80 );
1.1.1.5 root 465: int floatx80_is_nan( floatx80 );
1.1 root 466:
467: INLINE floatx80 floatx80_abs(floatx80 a)
468: {
469: return fabsl(a);
470: }
471:
472: INLINE floatx80 floatx80_chs(floatx80 a)
473: {
474: return -a;
475: }
1.1.1.4 root 476:
1.1.1.5 root 477: INLINE floatx80 floatx80_is_infinity(floatx80 a)
478: {
479: return fpclassify(a) == FP_INFINITE;
480: }
481:
482: INLINE floatx80 floatx80_is_neg(floatx80 a)
483: {
484: floatx80u u;
485: u.f = a;
486: return u.i.high >> 15;
487: }
488:
489: INLINE floatx80 floatx80_is_zero(floatx80 a)
490: {
491: return fpclassify(a) == FP_ZERO;
492: }
493:
1.1.1.4 root 494: INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
495: {
496: return scalbnl(a, n);
497: }
498:
1.1 root 499: #endif
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