1 /* Native implementation of soft float functions. Only a single status
2 context is supported */
5 #if defined(HOST_SOLARIS)
9 void set_float_rounding_mode(int val STATUS_PARAM)
11 STATUS(float_rounding_mode) = val;
12 #if defined(HOST_BSD) && !defined(__APPLE__) || \
13 (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
15 #elif defined(__arm__)
23 void set_floatx80_rounding_precision(int val STATUS_PARAM)
25 STATUS(floatx80_rounding_precision) = val;
29 #if defined(HOST_BSD) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
30 #define lrint(d) ((int32_t)rint(d))
31 #define llrint(d) ((int64_t)rint(d))
32 #define lrintf(f) ((int32_t)rint(f))
33 #define llrintf(f) ((int64_t)rint(f))
34 #define sqrtf(f) ((float)sqrt(f))
35 #define remainderf(fa, fb) ((float)remainder(fa, fb))
36 #define rintf(f) ((float)rint(f))
37 #if !defined(__sparc__) && defined(HOST_SOLARIS) && HOST_SOLARIS < 10
38 extern long double rintl(long double);
39 extern long double scalbnl(long double, int);
42 llrintl(long double x) {
43 return ((long long) rintl(x));
47 lrintl(long double x) {
48 return ((long) rintl(x));
52 ldexpl(long double x, int n) {
53 return (scalbnl(x, n));
58 #if defined(_ARCH_PPC)
60 /* correct (but slow) PowerPC rint() (glibc version is incorrect) */
61 static double qemu_rint(double x)
63 double y = 4503599627370496.0;
74 #define rint qemu_rint
77 /*----------------------------------------------------------------------------
78 | Software IEC/IEEE integer-to-floating-point conversion routines.
79 *----------------------------------------------------------------------------*/
80 float32 int32_to_float32(int v STATUS_PARAM)
85 float32 uint32_to_float32(unsigned int v STATUS_PARAM)
90 float64 int32_to_float64(int v STATUS_PARAM)
95 float64 uint32_to_float64(unsigned int v STATUS_PARAM)
101 floatx80 int32_to_floatx80(int v STATUS_PARAM)
106 float32 int64_to_float32( int64_t v STATUS_PARAM)
110 float32 uint64_to_float32( uint64_t v STATUS_PARAM)
114 float64 int64_to_float64( int64_t v STATUS_PARAM)
118 float64 uint64_to_float64( uint64_t v STATUS_PARAM)
123 floatx80 int64_to_floatx80( int64_t v STATUS_PARAM)
129 /* XXX: this code implements the x86 behaviour, not the IEEE one. */
130 #if HOST_LONG_BITS == 32
131 static inline int long_to_int32(long a)
136 static inline int long_to_int32(long a)
144 /*----------------------------------------------------------------------------
145 | Software IEC/IEEE single-precision conversion routines.
146 *----------------------------------------------------------------------------*/
147 int float32_to_int32( float32 a STATUS_PARAM)
149 return long_to_int32(lrintf(a));
151 int float32_to_int32_round_to_zero( float32 a STATUS_PARAM)
155 int64_t float32_to_int64( float32 a STATUS_PARAM)
160 int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM)
165 float64 float32_to_float64( float32 a STATUS_PARAM)
170 floatx80 float32_to_floatx80( float32 a STATUS_PARAM)
176 unsigned int float32_to_uint32( float32 a STATUS_PARAM)
184 } else if (v > 0xffffffff) {
191 unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM)
199 } else if (v > 0xffffffff) {
207 /*----------------------------------------------------------------------------
208 | Software IEC/IEEE single-precision operations.
209 *----------------------------------------------------------------------------*/
210 float32 float32_round_to_int( float32 a STATUS_PARAM)
215 float32 float32_rem( float32 a, float32 b STATUS_PARAM)
217 return remainderf(a, b);
220 float32 float32_sqrt( float32 a STATUS_PARAM)
224 int float32_compare( float32 a, float32 b STATUS_PARAM )
227 return float_relation_less;
229 return float_relation_equal;
231 return float_relation_greater;
233 return float_relation_unordered;
236 int float32_compare_quiet( float32 a, float32 b STATUS_PARAM )
239 return float_relation_less;
241 return float_relation_equal;
242 } else if (isgreater(a, b)) {
243 return float_relation_greater;
245 return float_relation_unordered;
248 int float32_is_signaling_nan( float32 a1)
254 return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
257 int float32_is_nan( float32 a1 )
263 return ( 0xFF800000 < ( a<<1 ) );
266 /*----------------------------------------------------------------------------
267 | Software IEC/IEEE double-precision conversion routines.
268 *----------------------------------------------------------------------------*/
269 int float64_to_int32( float64 a STATUS_PARAM)
271 return long_to_int32(lrint(a));
273 int float64_to_int32_round_to_zero( float64 a STATUS_PARAM)
277 int64_t float64_to_int64( float64 a STATUS_PARAM)
281 int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM)
285 float32 float64_to_float32( float64 a STATUS_PARAM)
290 floatx80 float64_to_floatx80( float64 a STATUS_PARAM)
296 float128 float64_to_float128( float64 a STATUS_PARAM)
302 unsigned int float64_to_uint32( float64 a STATUS_PARAM)
310 } else if (v > 0xffffffff) {
317 unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM)
325 } else if (v > 0xffffffff) {
332 uint64_t float64_to_uint64 (float64 a STATUS_PARAM)
336 v = llrint(a + (float64)INT64_MIN);
338 return v - INT64_MIN;
340 uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM)
344 v = (int64_t)(a + (float64)INT64_MIN);
346 return v - INT64_MIN;
349 /*----------------------------------------------------------------------------
350 | Software IEC/IEEE double-precision operations.
351 *----------------------------------------------------------------------------*/
352 #if defined(__sun__) && defined(HOST_SOLARIS) && HOST_SOLARIS < 10
353 static inline float64 trunc(float64 x)
355 return x < 0 ? -floor(-x) : floor(x);
358 float64 float64_trunc_to_int( float64 a STATUS_PARAM )
363 float64 float64_round_to_int( float64 a STATUS_PARAM )
366 switch(STATUS(float_rounding_mode)) {
368 case float_round_nearest_even:
369 asm("rndd %0, %1" : "=f" (a) : "f"(a));
371 case float_round_down:
372 asm("rnddm %0, %1" : "=f" (a) : "f"(a));
375 asm("rnddp %0, %1" : "=f" (a) : "f"(a));
377 case float_round_to_zero:
378 asm("rnddz %0, %1" : "=f" (a) : "f"(a));
386 float64 float64_rem( float64 a, float64 b STATUS_PARAM)
388 return remainder(a, b);
391 float64 float64_sqrt( float64 a STATUS_PARAM)
395 int float64_compare( float64 a, float64 b STATUS_PARAM )
398 return float_relation_less;
400 return float_relation_equal;
402 return float_relation_greater;
404 return float_relation_unordered;
407 int float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
410 return float_relation_less;
412 return float_relation_equal;
413 } else if (isgreater(a, b)) {
414 return float_relation_greater;
416 return float_relation_unordered;
419 int float64_is_signaling_nan( float64 a1)
426 ( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
427 && ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
431 int float64_is_nan( float64 a1 )
438 return ( LIT64( 0xFFF0000000000000 ) < (bits64) ( a<<1 ) );
444 /*----------------------------------------------------------------------------
445 | Software IEC/IEEE extended double-precision conversion routines.
446 *----------------------------------------------------------------------------*/
447 int floatx80_to_int32( floatx80 a STATUS_PARAM)
449 return long_to_int32(lrintl(a));
451 int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
455 int64_t floatx80_to_int64( floatx80 a STATUS_PARAM)
459 int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM)
463 float32 floatx80_to_float32( floatx80 a STATUS_PARAM)
467 float64 floatx80_to_float64( floatx80 a STATUS_PARAM)
472 /*----------------------------------------------------------------------------
473 | Software IEC/IEEE extended double-precision operations.
474 *----------------------------------------------------------------------------*/
475 floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM)
479 floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM)
481 return remainderl(a, b);
483 floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM)
487 int floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
490 return float_relation_less;
492 return float_relation_equal;
494 return float_relation_greater;
496 return float_relation_unordered;
499 int floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
502 return float_relation_less;
504 return float_relation_equal;
505 } else if (isgreater(a, b)) {
506 return float_relation_greater;
508 return float_relation_unordered;
511 int floatx80_is_signaling_nan( floatx80 a1)
517 aLow = u.i.low & ~ LIT64( 0x4000000000000000 );
519 ( ( u.i.high & 0x7FFF ) == 0x7FFF )
520 && (bits64) ( aLow<<1 )
521 && ( u.i.low == aLow );
524 int floatx80_is_nan( floatx80 a1 )
528 return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 );