root / fpu / softfloat.h @ 211315fb
History | View | Annotate | Download (25.1 kB)
1 |
/*
|
---|---|
2 |
* QEMU float support
|
3 |
*
|
4 |
* Derived from SoftFloat.
|
5 |
*/
|
6 |
|
7 |
/*============================================================================
|
8 |
|
9 |
This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
|
10 |
Package, Release 2b.
|
11 |
|
12 |
Written by John R. Hauser. This work was made possible in part by the
|
13 |
International Computer Science Institute, located at Suite 600, 1947 Center
|
14 |
Street, Berkeley, California 94704. Funding was partially provided by the
|
15 |
National Science Foundation under grant MIP-9311980. The original version
|
16 |
of this code was written as part of a project to build a fixed-point vector
|
17 |
processor in collaboration with the University of California at Berkeley,
|
18 |
overseen by Profs. Nelson Morgan and John Wawrzynek. More information
|
19 |
is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
|
20 |
arithmetic/SoftFloat.html'.
|
21 |
|
22 |
THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
|
23 |
been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
|
24 |
RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
|
25 |
AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
|
26 |
COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
|
27 |
EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
|
28 |
INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
|
29 |
OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
|
30 |
|
31 |
Derivative works are acceptable, even for commercial purposes, so long as
|
32 |
(1) the source code for the derivative work includes prominent notice that
|
33 |
the work is derivative, and (2) the source code includes prominent notice with
|
34 |
these four paragraphs for those parts of this code that are retained.
|
35 |
|
36 |
=============================================================================*/
|
37 |
|
38 |
#ifndef SOFTFLOAT_H
|
39 |
#define SOFTFLOAT_H
|
40 |
|
41 |
#if defined(CONFIG_SOLARIS) && defined(CONFIG_NEEDS_LIBSUNMATH)
|
42 |
#include <sunmath.h> |
43 |
#endif
|
44 |
|
45 |
#include <inttypes.h> |
46 |
#include "config.h" |
47 |
|
48 |
/*----------------------------------------------------------------------------
|
49 |
| Each of the following `typedef's defines the most convenient type that holds
|
50 |
| integers of at least as many bits as specified. For example, `uint8' should
|
51 |
| be the most convenient type that can hold unsigned integers of as many as
|
52 |
| 8 bits. The `flag' type must be able to hold either a 0 or 1. For most
|
53 |
| implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
|
54 |
| to the same as `int'.
|
55 |
*----------------------------------------------------------------------------*/
|
56 |
typedef uint8_t flag;
|
57 |
typedef uint8_t uint8;
|
58 |
typedef int8_t int8;
|
59 |
#ifndef _AIX
|
60 |
typedef int uint16; |
61 |
typedef int int16; |
62 |
#endif
|
63 |
typedef unsigned int uint32; |
64 |
typedef signed int int32; |
65 |
typedef uint64_t uint64;
|
66 |
typedef int64_t int64;
|
67 |
|
68 |
#define LIT64( a ) a##LL |
69 |
#define INLINE static inline |
70 |
|
71 |
#if defined(TARGET_MIPS) || defined(TARGET_SH4) || defined(TARGET_UNICORE32)
|
72 |
#define SNAN_BIT_IS_ONE 1 |
73 |
#else
|
74 |
#define SNAN_BIT_IS_ONE 0 |
75 |
#endif
|
76 |
|
77 |
/*----------------------------------------------------------------------------
|
78 |
| The macro `FLOATX80' must be defined to enable the extended double-precision
|
79 |
| floating-point format `floatx80'. If this macro is not defined, the
|
80 |
| `floatx80' type will not be defined, and none of the functions that either
|
81 |
| input or output the `floatx80' type will be defined. The same applies to
|
82 |
| the `FLOAT128' macro and the quadruple-precision format `float128'.
|
83 |
*----------------------------------------------------------------------------*/
|
84 |
#ifdef CONFIG_SOFTFLOAT
|
85 |
/* bit exact soft float support */
|
86 |
#define FLOATX80
|
87 |
#define FLOAT128
|
88 |
#else
|
89 |
/* native float support */
|
90 |
#if (defined(__i386__) || defined(__x86_64__)) && !defined(CONFIG_BSD)
|
91 |
#define FLOATX80
|
92 |
#endif
|
93 |
#endif /* !CONFIG_SOFTFLOAT */ |
94 |
|
95 |
#define STATUS_PARAM , float_status *status
|
96 |
#define STATUS(field) status->field
|
97 |
#define STATUS_VAR , status
|
98 |
|
99 |
/*----------------------------------------------------------------------------
|
100 |
| Software IEC/IEEE floating-point ordering relations
|
101 |
*----------------------------------------------------------------------------*/
|
102 |
enum {
|
103 |
float_relation_less = -1,
|
104 |
float_relation_equal = 0,
|
105 |
float_relation_greater = 1,
|
106 |
float_relation_unordered = 2
|
107 |
}; |
108 |
|
109 |
#ifdef CONFIG_SOFTFLOAT
|
110 |
/*----------------------------------------------------------------------------
|
111 |
| Software IEC/IEEE floating-point types.
|
112 |
*----------------------------------------------------------------------------*/
|
113 |
/* Use structures for soft-float types. This prevents accidentally mixing
|
114 |
them with native int/float types. A sufficiently clever compiler and
|
115 |
sane ABI should be able to see though these structs. However
|
116 |
x86/gcc 3.x seems to struggle a bit, so leave them disabled by default. */
|
117 |
//#define USE_SOFTFLOAT_STRUCT_TYPES
|
118 |
#ifdef USE_SOFTFLOAT_STRUCT_TYPES
|
119 |
typedef struct { |
120 |
uint16_t v; |
121 |
} float16; |
122 |
#define float16_val(x) (((float16)(x)).v)
|
123 |
#define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
|
124 |
#define const_float16(x) { x }
|
125 |
typedef struct { |
126 |
uint32_t v; |
127 |
} float32; |
128 |
/* The cast ensures an error if the wrong type is passed. */
|
129 |
#define float32_val(x) (((float32)(x)).v)
|
130 |
#define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
|
131 |
#define const_float32(x) { x }
|
132 |
typedef struct { |
133 |
uint64_t v; |
134 |
} float64; |
135 |
#define float64_val(x) (((float64)(x)).v)
|
136 |
#define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
|
137 |
#define const_float64(x) { x }
|
138 |
#else
|
139 |
typedef uint16_t float16;
|
140 |
typedef uint32_t float32;
|
141 |
typedef uint64_t float64;
|
142 |
#define float16_val(x) (x)
|
143 |
#define float32_val(x) (x)
|
144 |
#define float64_val(x) (x)
|
145 |
#define make_float16(x) (x)
|
146 |
#define make_float32(x) (x)
|
147 |
#define make_float64(x) (x)
|
148 |
#define const_float16(x) (x)
|
149 |
#define const_float32(x) (x)
|
150 |
#define const_float64(x) (x)
|
151 |
#endif
|
152 |
#ifdef FLOATX80
|
153 |
typedef struct { |
154 |
uint64_t low; |
155 |
uint16_t high; |
156 |
} floatx80; |
157 |
#endif
|
158 |
#ifdef FLOAT128
|
159 |
typedef struct { |
160 |
#ifdef HOST_WORDS_BIGENDIAN
|
161 |
uint64_t high, low; |
162 |
#else
|
163 |
uint64_t low, high; |
164 |
#endif
|
165 |
} float128; |
166 |
#endif
|
167 |
|
168 |
/*----------------------------------------------------------------------------
|
169 |
| Software IEC/IEEE floating-point underflow tininess-detection mode.
|
170 |
*----------------------------------------------------------------------------*/
|
171 |
enum {
|
172 |
float_tininess_after_rounding = 0,
|
173 |
float_tininess_before_rounding = 1
|
174 |
}; |
175 |
|
176 |
/*----------------------------------------------------------------------------
|
177 |
| Software IEC/IEEE floating-point rounding mode.
|
178 |
*----------------------------------------------------------------------------*/
|
179 |
enum {
|
180 |
float_round_nearest_even = 0,
|
181 |
float_round_down = 1,
|
182 |
float_round_up = 2,
|
183 |
float_round_to_zero = 3
|
184 |
}; |
185 |
|
186 |
/*----------------------------------------------------------------------------
|
187 |
| Software IEC/IEEE floating-point exception flags.
|
188 |
*----------------------------------------------------------------------------*/
|
189 |
enum {
|
190 |
float_flag_invalid = 1,
|
191 |
float_flag_divbyzero = 4,
|
192 |
float_flag_overflow = 8,
|
193 |
float_flag_underflow = 16,
|
194 |
float_flag_inexact = 32,
|
195 |
float_flag_input_denormal = 64
|
196 |
}; |
197 |
|
198 |
typedef struct float_status { |
199 |
signed char float_detect_tininess; |
200 |
signed char float_rounding_mode; |
201 |
signed char float_exception_flags; |
202 |
#ifdef FLOATX80
|
203 |
signed char floatx80_rounding_precision; |
204 |
#endif
|
205 |
/* should denormalised results go to zero and set the inexact flag? */
|
206 |
flag flush_to_zero; |
207 |
/* should denormalised inputs go to zero and set the input_denormal flag? */
|
208 |
flag flush_inputs_to_zero; |
209 |
flag default_nan_mode; |
210 |
} float_status; |
211 |
|
212 |
void set_float_rounding_mode(int val STATUS_PARAM); |
213 |
void set_float_exception_flags(int val STATUS_PARAM); |
214 |
INLINE void set_float_detect_tininess(int val STATUS_PARAM) |
215 |
{ |
216 |
STATUS(float_detect_tininess) = val; |
217 |
} |
218 |
INLINE void set_flush_to_zero(flag val STATUS_PARAM)
|
219 |
{ |
220 |
STATUS(flush_to_zero) = val; |
221 |
} |
222 |
INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
|
223 |
{ |
224 |
STATUS(flush_inputs_to_zero) = val; |
225 |
} |
226 |
INLINE void set_default_nan_mode(flag val STATUS_PARAM)
|
227 |
{ |
228 |
STATUS(default_nan_mode) = val; |
229 |
} |
230 |
INLINE int get_float_exception_flags(float_status *status)
|
231 |
{ |
232 |
return STATUS(float_exception_flags);
|
233 |
} |
234 |
#ifdef FLOATX80
|
235 |
void set_floatx80_rounding_precision(int val STATUS_PARAM); |
236 |
#endif
|
237 |
|
238 |
/*----------------------------------------------------------------------------
|
239 |
| Routine to raise any or all of the software IEC/IEEE floating-point
|
240 |
| exception flags.
|
241 |
*----------------------------------------------------------------------------*/
|
242 |
void float_raise( int8 flags STATUS_PARAM);
|
243 |
|
244 |
/*----------------------------------------------------------------------------
|
245 |
| Software IEC/IEEE integer-to-floating-point conversion routines.
|
246 |
*----------------------------------------------------------------------------*/
|
247 |
float32 int32_to_float32( int32 STATUS_PARAM ); |
248 |
float64 int32_to_float64( int32 STATUS_PARAM ); |
249 |
float32 uint32_to_float32( unsigned int STATUS_PARAM ); |
250 |
float64 uint32_to_float64( unsigned int STATUS_PARAM ); |
251 |
#ifdef FLOATX80
|
252 |
floatx80 int32_to_floatx80( int32 STATUS_PARAM ); |
253 |
#endif
|
254 |
#ifdef FLOAT128
|
255 |
float128 int32_to_float128( int32 STATUS_PARAM ); |
256 |
#endif
|
257 |
float32 int64_to_float32( int64 STATUS_PARAM ); |
258 |
float32 uint64_to_float32( uint64 STATUS_PARAM ); |
259 |
float64 int64_to_float64( int64 STATUS_PARAM ); |
260 |
float64 uint64_to_float64( uint64 STATUS_PARAM ); |
261 |
#ifdef FLOATX80
|
262 |
floatx80 int64_to_floatx80( int64 STATUS_PARAM ); |
263 |
#endif
|
264 |
#ifdef FLOAT128
|
265 |
float128 int64_to_float128( int64 STATUS_PARAM ); |
266 |
#endif
|
267 |
|
268 |
/*----------------------------------------------------------------------------
|
269 |
| Software half-precision conversion routines.
|
270 |
*----------------------------------------------------------------------------*/
|
271 |
float16 float32_to_float16( float32, flag STATUS_PARAM ); |
272 |
float32 float16_to_float32( float16, flag STATUS_PARAM ); |
273 |
|
274 |
/*----------------------------------------------------------------------------
|
275 |
| Software half-precision operations.
|
276 |
*----------------------------------------------------------------------------*/
|
277 |
int float16_is_quiet_nan( float16 );
|
278 |
int float16_is_signaling_nan( float16 );
|
279 |
float16 float16_maybe_silence_nan( float16 ); |
280 |
|
281 |
/*----------------------------------------------------------------------------
|
282 |
| The pattern for a default generated half-precision NaN.
|
283 |
*----------------------------------------------------------------------------*/
|
284 |
#if defined(TARGET_ARM)
|
285 |
#define float16_default_nan make_float16(0x7E00) |
286 |
#elif SNAN_BIT_IS_ONE
|
287 |
#define float16_default_nan make_float16(0x7DFF) |
288 |
#else
|
289 |
#define float16_default_nan make_float16(0xFE00) |
290 |
#endif
|
291 |
|
292 |
/*----------------------------------------------------------------------------
|
293 |
| Software IEC/IEEE single-precision conversion routines.
|
294 |
*----------------------------------------------------------------------------*/
|
295 |
int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM ); |
296 |
unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM ); |
297 |
int32 float32_to_int32( float32 STATUS_PARAM ); |
298 |
int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM ); |
299 |
uint32 float32_to_uint32( float32 STATUS_PARAM ); |
300 |
uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM ); |
301 |
int64 float32_to_int64( float32 STATUS_PARAM ); |
302 |
int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM ); |
303 |
float64 float32_to_float64( float32 STATUS_PARAM ); |
304 |
#ifdef FLOATX80
|
305 |
floatx80 float32_to_floatx80( float32 STATUS_PARAM ); |
306 |
#endif
|
307 |
#ifdef FLOAT128
|
308 |
float128 float32_to_float128( float32 STATUS_PARAM ); |
309 |
#endif
|
310 |
|
311 |
/*----------------------------------------------------------------------------
|
312 |
| Software IEC/IEEE single-precision operations.
|
313 |
*----------------------------------------------------------------------------*/
|
314 |
float32 float32_round_to_int( float32 STATUS_PARAM ); |
315 |
float32 float32_add( float32, float32 STATUS_PARAM ); |
316 |
float32 float32_sub( float32, float32 STATUS_PARAM ); |
317 |
float32 float32_mul( float32, float32 STATUS_PARAM ); |
318 |
float32 float32_div( float32, float32 STATUS_PARAM ); |
319 |
float32 float32_rem( float32, float32 STATUS_PARAM ); |
320 |
float32 float32_sqrt( float32 STATUS_PARAM ); |
321 |
float32 float32_exp2( float32 STATUS_PARAM ); |
322 |
float32 float32_log2( float32 STATUS_PARAM ); |
323 |
int float32_eq_quiet( float32, float32 STATUS_PARAM );
|
324 |
int float32_le( float32, float32 STATUS_PARAM );
|
325 |
int float32_lt( float32, float32 STATUS_PARAM );
|
326 |
int float32_unordered( float32, float32 STATUS_PARAM );
|
327 |
int float32_eq_signaling( float32, float32 STATUS_PARAM );
|
328 |
int float32_le_quiet( float32, float32 STATUS_PARAM );
|
329 |
int float32_lt_quiet( float32, float32 STATUS_PARAM );
|
330 |
int float32_unordered_quiet( float32, float32 STATUS_PARAM );
|
331 |
int float32_compare( float32, float32 STATUS_PARAM );
|
332 |
int float32_compare_quiet( float32, float32 STATUS_PARAM );
|
333 |
float32 float32_min(float32, float32 STATUS_PARAM); |
334 |
float32 float32_max(float32, float32 STATUS_PARAM); |
335 |
int float32_is_quiet_nan( float32 );
|
336 |
int float32_is_signaling_nan( float32 );
|
337 |
float32 float32_maybe_silence_nan( float32 ); |
338 |
float32 float32_scalbn( float32, int STATUS_PARAM );
|
339 |
|
340 |
INLINE float32 float32_abs(float32 a) |
341 |
{ |
342 |
/* Note that abs does *not* handle NaN specially, nor does
|
343 |
* it flush denormal inputs to zero.
|
344 |
*/
|
345 |
return make_float32(float32_val(a) & 0x7fffffff); |
346 |
} |
347 |
|
348 |
INLINE float32 float32_chs(float32 a) |
349 |
{ |
350 |
/* Note that chs does *not* handle NaN specially, nor does
|
351 |
* it flush denormal inputs to zero.
|
352 |
*/
|
353 |
return make_float32(float32_val(a) ^ 0x80000000); |
354 |
} |
355 |
|
356 |
INLINE int float32_is_infinity(float32 a)
|
357 |
{ |
358 |
return (float32_val(a) & 0x7fffffff) == 0x7f800000; |
359 |
} |
360 |
|
361 |
INLINE int float32_is_neg(float32 a)
|
362 |
{ |
363 |
return float32_val(a) >> 31; |
364 |
} |
365 |
|
366 |
INLINE int float32_is_zero(float32 a)
|
367 |
{ |
368 |
return (float32_val(a) & 0x7fffffff) == 0; |
369 |
} |
370 |
|
371 |
INLINE int float32_is_any_nan(float32 a)
|
372 |
{ |
373 |
return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL); |
374 |
} |
375 |
|
376 |
INLINE int float32_is_zero_or_denormal(float32 a)
|
377 |
{ |
378 |
return (float32_val(a) & 0x7f800000) == 0; |
379 |
} |
380 |
|
381 |
INLINE float32 float32_set_sign(float32 a, int sign)
|
382 |
{ |
383 |
return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31)); |
384 |
} |
385 |
|
386 |
#define float32_zero make_float32(0) |
387 |
#define float32_one make_float32(0x3f800000) |
388 |
#define float32_ln2 make_float32(0x3f317218) |
389 |
#define float32_half make_float32(0x3f000000) |
390 |
#define float32_infinity make_float32(0x7f800000) |
391 |
|
392 |
|
393 |
/*----------------------------------------------------------------------------
|
394 |
| The pattern for a default generated single-precision NaN.
|
395 |
*----------------------------------------------------------------------------*/
|
396 |
#if defined(TARGET_SPARC)
|
397 |
#define float32_default_nan make_float32(0x7FFFFFFF) |
398 |
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
|
399 |
#define float32_default_nan make_float32(0x7FC00000) |
400 |
#elif SNAN_BIT_IS_ONE
|
401 |
#define float32_default_nan make_float32(0x7FBFFFFF) |
402 |
#else
|
403 |
#define float32_default_nan make_float32(0xFFC00000) |
404 |
#endif
|
405 |
|
406 |
/*----------------------------------------------------------------------------
|
407 |
| Software IEC/IEEE double-precision conversion routines.
|
408 |
*----------------------------------------------------------------------------*/
|
409 |
int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM ); |
410 |
unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM ); |
411 |
int32 float64_to_int32( float64 STATUS_PARAM ); |
412 |
int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM ); |
413 |
uint32 float64_to_uint32( float64 STATUS_PARAM ); |
414 |
uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM ); |
415 |
int64 float64_to_int64( float64 STATUS_PARAM ); |
416 |
int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM ); |
417 |
uint64 float64_to_uint64 (float64 a STATUS_PARAM); |
418 |
uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM); |
419 |
float32 float64_to_float32( float64 STATUS_PARAM ); |
420 |
#ifdef FLOATX80
|
421 |
floatx80 float64_to_floatx80( float64 STATUS_PARAM ); |
422 |
#endif
|
423 |
#ifdef FLOAT128
|
424 |
float128 float64_to_float128( float64 STATUS_PARAM ); |
425 |
#endif
|
426 |
|
427 |
/*----------------------------------------------------------------------------
|
428 |
| Software IEC/IEEE double-precision operations.
|
429 |
*----------------------------------------------------------------------------*/
|
430 |
float64 float64_round_to_int( float64 STATUS_PARAM ); |
431 |
float64 float64_trunc_to_int( float64 STATUS_PARAM ); |
432 |
float64 float64_add( float64, float64 STATUS_PARAM ); |
433 |
float64 float64_sub( float64, float64 STATUS_PARAM ); |
434 |
float64 float64_mul( float64, float64 STATUS_PARAM ); |
435 |
float64 float64_div( float64, float64 STATUS_PARAM ); |
436 |
float64 float64_rem( float64, float64 STATUS_PARAM ); |
437 |
float64 float64_sqrt( float64 STATUS_PARAM ); |
438 |
float64 float64_log2( float64 STATUS_PARAM ); |
439 |
int float64_eq_quiet( float64, float64 STATUS_PARAM );
|
440 |
int float64_le( float64, float64 STATUS_PARAM );
|
441 |
int float64_lt( float64, float64 STATUS_PARAM );
|
442 |
int float64_unordered( float64, float64 STATUS_PARAM );
|
443 |
int float64_eq_signaling( float64, float64 STATUS_PARAM );
|
444 |
int float64_le_quiet( float64, float64 STATUS_PARAM );
|
445 |
int float64_lt_quiet( float64, float64 STATUS_PARAM );
|
446 |
int float64_unordered_quiet( float64, float64 STATUS_PARAM );
|
447 |
int float64_compare( float64, float64 STATUS_PARAM );
|
448 |
int float64_compare_quiet( float64, float64 STATUS_PARAM );
|
449 |
float64 float64_min(float64, float64 STATUS_PARAM); |
450 |
float64 float64_max(float64, float64 STATUS_PARAM); |
451 |
int float64_is_quiet_nan( float64 a );
|
452 |
int float64_is_signaling_nan( float64 );
|
453 |
float64 float64_maybe_silence_nan( float64 ); |
454 |
float64 float64_scalbn( float64, int STATUS_PARAM );
|
455 |
|
456 |
INLINE float64 float64_abs(float64 a) |
457 |
{ |
458 |
/* Note that abs does *not* handle NaN specially, nor does
|
459 |
* it flush denormal inputs to zero.
|
460 |
*/
|
461 |
return make_float64(float64_val(a) & 0x7fffffffffffffffLL); |
462 |
} |
463 |
|
464 |
INLINE float64 float64_chs(float64 a) |
465 |
{ |
466 |
/* Note that chs does *not* handle NaN specially, nor does
|
467 |
* it flush denormal inputs to zero.
|
468 |
*/
|
469 |
return make_float64(float64_val(a) ^ 0x8000000000000000LL); |
470 |
} |
471 |
|
472 |
INLINE int float64_is_infinity(float64 a)
|
473 |
{ |
474 |
return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL; |
475 |
} |
476 |
|
477 |
INLINE int float64_is_neg(float64 a)
|
478 |
{ |
479 |
return float64_val(a) >> 63; |
480 |
} |
481 |
|
482 |
INLINE int float64_is_zero(float64 a)
|
483 |
{ |
484 |
return (float64_val(a) & 0x7fffffffffffffffLL) == 0; |
485 |
} |
486 |
|
487 |
INLINE int float64_is_any_nan(float64 a)
|
488 |
{ |
489 |
return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL); |
490 |
} |
491 |
|
492 |
INLINE float64 float64_set_sign(float64 a, int sign)
|
493 |
{ |
494 |
return make_float64((float64_val(a) & 0x7fffffffffffffffULL) |
495 |
| ((int64_t)sign << 63));
|
496 |
} |
497 |
|
498 |
#define float64_zero make_float64(0) |
499 |
#define float64_one make_float64(0x3ff0000000000000LL) |
500 |
#define float64_ln2 make_float64(0x3fe62e42fefa39efLL) |
501 |
#define float64_half make_float64(0x3fe0000000000000LL) |
502 |
#define float64_infinity make_float64(0x7ff0000000000000LL) |
503 |
|
504 |
/*----------------------------------------------------------------------------
|
505 |
| The pattern for a default generated double-precision NaN.
|
506 |
*----------------------------------------------------------------------------*/
|
507 |
#if defined(TARGET_SPARC)
|
508 |
#define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF )) |
509 |
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
|
510 |
#define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 )) |
511 |
#elif SNAN_BIT_IS_ONE
|
512 |
#define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF )) |
513 |
#else
|
514 |
#define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 )) |
515 |
#endif
|
516 |
|
517 |
#ifdef FLOATX80
|
518 |
|
519 |
/*----------------------------------------------------------------------------
|
520 |
| Software IEC/IEEE extended double-precision conversion routines.
|
521 |
*----------------------------------------------------------------------------*/
|
522 |
int32 floatx80_to_int32( floatx80 STATUS_PARAM ); |
523 |
int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM ); |
524 |
int64 floatx80_to_int64( floatx80 STATUS_PARAM ); |
525 |
int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM ); |
526 |
float32 floatx80_to_float32( floatx80 STATUS_PARAM ); |
527 |
float64 floatx80_to_float64( floatx80 STATUS_PARAM ); |
528 |
#ifdef FLOAT128
|
529 |
float128 floatx80_to_float128( floatx80 STATUS_PARAM ); |
530 |
#endif
|
531 |
|
532 |
/*----------------------------------------------------------------------------
|
533 |
| Software IEC/IEEE extended double-precision operations.
|
534 |
*----------------------------------------------------------------------------*/
|
535 |
floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM ); |
536 |
floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM ); |
537 |
floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM ); |
538 |
floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM ); |
539 |
floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM ); |
540 |
floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM ); |
541 |
floatx80 floatx80_sqrt( floatx80 STATUS_PARAM ); |
542 |
int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM );
|
543 |
int floatx80_le( floatx80, floatx80 STATUS_PARAM );
|
544 |
int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
|
545 |
int floatx80_unordered( floatx80, floatx80 STATUS_PARAM );
|
546 |
int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
|
547 |
int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
|
548 |
int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
|
549 |
int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM );
|
550 |
int floatx80_is_quiet_nan( floatx80 );
|
551 |
int floatx80_is_signaling_nan( floatx80 );
|
552 |
floatx80 floatx80_maybe_silence_nan( floatx80 ); |
553 |
floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
|
554 |
|
555 |
INLINE floatx80 floatx80_abs(floatx80 a) |
556 |
{ |
557 |
a.high &= 0x7fff;
|
558 |
return a;
|
559 |
} |
560 |
|
561 |
INLINE floatx80 floatx80_chs(floatx80 a) |
562 |
{ |
563 |
a.high ^= 0x8000;
|
564 |
return a;
|
565 |
} |
566 |
|
567 |
INLINE int floatx80_is_infinity(floatx80 a)
|
568 |
{ |
569 |
return (a.high & 0x7fff) == 0x7fff && a.low == 0; |
570 |
} |
571 |
|
572 |
INLINE int floatx80_is_neg(floatx80 a)
|
573 |
{ |
574 |
return a.high >> 15; |
575 |
} |
576 |
|
577 |
INLINE int floatx80_is_zero(floatx80 a)
|
578 |
{ |
579 |
return (a.high & 0x7fff) == 0 && a.low == 0; |
580 |
} |
581 |
|
582 |
INLINE int floatx80_is_any_nan(floatx80 a)
|
583 |
{ |
584 |
return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1); |
585 |
} |
586 |
|
587 |
/*----------------------------------------------------------------------------
|
588 |
| The pattern for a default generated extended double-precision NaN. The
|
589 |
| `high' and `low' values hold the most- and least-significant bits,
|
590 |
| respectively.
|
591 |
*----------------------------------------------------------------------------*/
|
592 |
#if SNAN_BIT_IS_ONE
|
593 |
#define floatx80_default_nan_high 0x7FFF |
594 |
#define floatx80_default_nan_low LIT64( 0xBFFFFFFFFFFFFFFF ) |
595 |
#else
|
596 |
#define floatx80_default_nan_high 0xFFFF |
597 |
#define floatx80_default_nan_low LIT64( 0xC000000000000000 ) |
598 |
#endif
|
599 |
|
600 |
#endif
|
601 |
|
602 |
#ifdef FLOAT128
|
603 |
|
604 |
/*----------------------------------------------------------------------------
|
605 |
| Software IEC/IEEE quadruple-precision conversion routines.
|
606 |
*----------------------------------------------------------------------------*/
|
607 |
int32 float128_to_int32( float128 STATUS_PARAM ); |
608 |
int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM ); |
609 |
int64 float128_to_int64( float128 STATUS_PARAM ); |
610 |
int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM ); |
611 |
float32 float128_to_float32( float128 STATUS_PARAM ); |
612 |
float64 float128_to_float64( float128 STATUS_PARAM ); |
613 |
#ifdef FLOATX80
|
614 |
floatx80 float128_to_floatx80( float128 STATUS_PARAM ); |
615 |
#endif
|
616 |
|
617 |
/*----------------------------------------------------------------------------
|
618 |
| Software IEC/IEEE quadruple-precision operations.
|
619 |
*----------------------------------------------------------------------------*/
|
620 |
float128 float128_round_to_int( float128 STATUS_PARAM ); |
621 |
float128 float128_add( float128, float128 STATUS_PARAM ); |
622 |
float128 float128_sub( float128, float128 STATUS_PARAM ); |
623 |
float128 float128_mul( float128, float128 STATUS_PARAM ); |
624 |
float128 float128_div( float128, float128 STATUS_PARAM ); |
625 |
float128 float128_rem( float128, float128 STATUS_PARAM ); |
626 |
float128 float128_sqrt( float128 STATUS_PARAM ); |
627 |
int float128_eq_quiet( float128, float128 STATUS_PARAM );
|
628 |
int float128_le( float128, float128 STATUS_PARAM );
|
629 |
int float128_lt( float128, float128 STATUS_PARAM );
|
630 |
int float128_unordered( float128, float128 STATUS_PARAM );
|
631 |
int float128_eq_signaling( float128, float128 STATUS_PARAM );
|
632 |
int float128_le_quiet( float128, float128 STATUS_PARAM );
|
633 |
int float128_lt_quiet( float128, float128 STATUS_PARAM );
|
634 |
int float128_unordered_quiet( float128, float128 STATUS_PARAM );
|
635 |
int float128_compare( float128, float128 STATUS_PARAM );
|
636 |
int float128_compare_quiet( float128, float128 STATUS_PARAM );
|
637 |
int float128_is_quiet_nan( float128 );
|
638 |
int float128_is_signaling_nan( float128 );
|
639 |
float128 float128_maybe_silence_nan( float128 ); |
640 |
float128 float128_scalbn( float128, int STATUS_PARAM );
|
641 |
|
642 |
INLINE float128 float128_abs(float128 a) |
643 |
{ |
644 |
a.high &= 0x7fffffffffffffffLL;
|
645 |
return a;
|
646 |
} |
647 |
|
648 |
INLINE float128 float128_chs(float128 a) |
649 |
{ |
650 |
a.high ^= 0x8000000000000000LL;
|
651 |
return a;
|
652 |
} |
653 |
|
654 |
INLINE int float128_is_infinity(float128 a)
|
655 |
{ |
656 |
return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0; |
657 |
} |
658 |
|
659 |
INLINE int float128_is_neg(float128 a)
|
660 |
{ |
661 |
return a.high >> 63; |
662 |
} |
663 |
|
664 |
INLINE int float128_is_zero(float128 a)
|
665 |
{ |
666 |
return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0; |
667 |
} |
668 |
|
669 |
INLINE int float128_is_any_nan(float128 a)
|
670 |
{ |
671 |
return ((a.high >> 48) & 0x7fff) == 0x7fff && |
672 |
((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0)); |
673 |
} |
674 |
|
675 |
/*----------------------------------------------------------------------------
|
676 |
| The pattern for a default generated quadruple-precision NaN. The `high' and
|
677 |
| `low' values hold the most- and least-significant bits, respectively.
|
678 |
*----------------------------------------------------------------------------*/
|
679 |
#if SNAN_BIT_IS_ONE
|
680 |
#define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF ) |
681 |
#define float128_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF ) |
682 |
#else
|
683 |
#define float128_default_nan_high LIT64( 0xFFFF800000000000 ) |
684 |
#define float128_default_nan_low LIT64( 0x0000000000000000 ) |
685 |
#endif
|
686 |
|
687 |
#endif
|
688 |
|
689 |
#else /* CONFIG_SOFTFLOAT */ |
690 |
|
691 |
#include "softfloat-native.h" |
692 |
|
693 |
#endif /* !CONFIG_SOFTFLOAT */ |
694 |
|
695 |
#endif /* !SOFTFLOAT_H */ |