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1.1 root 1: /* Native implementation of soft float functions. Only a single status
2: context is supported */
3: #include "softfloat.h"
4: #include <math.h>
5:
6: void set_float_rounding_mode(int val STATUS_PARAM)
7: {
8: STATUS(float_rounding_mode) = val;
1.1.1.3 root 9: #if defined(_BSD) && !defined(__APPLE__) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
1.1 root 10: fpsetround(val);
11: #elif defined(__arm__)
12: /* nothing to do */
13: #else
14: fesetround(val);
15: #endif
16: }
17:
18: #ifdef FLOATX80
19: void set_floatx80_rounding_precision(int val STATUS_PARAM)
20: {
21: STATUS(floatx80_rounding_precision) = val;
22: }
23: #endif
24:
1.1.1.3 root 25: #if defined(_BSD) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
26: #define lrint(d) ((int32_t)rint(d))
27: #define llrint(d) ((int64_t)rint(d))
28: #define lrintf(f) ((int32_t)rint(f))
29: #define llrintf(f) ((int64_t)rint(f))
30: #define sqrtf(f) ((float)sqrt(f))
31: #define remainderf(fa, fb) ((float)remainder(fa, fb))
32: #define rintf(f) ((float)rint(f))
1.1 root 33: #endif
34:
35: #if defined(__powerpc__)
36:
37: /* correct (but slow) PowerPC rint() (glibc version is incorrect) */
38: double qemu_rint(double x)
39: {
40: double y = 4503599627370496.0;
41: if (fabs(x) >= y)
42: return x;
43: if (x < 0)
44: y = -y;
45: y = (x + y) - y;
46: if (y == 0.0)
47: y = copysign(y, x);
48: return y;
49: }
50:
51: #define rint qemu_rint
52: #endif
53:
54: /*----------------------------------------------------------------------------
55: | Software IEC/IEEE integer-to-floating-point conversion routines.
56: *----------------------------------------------------------------------------*/
57: float32 int32_to_float32(int v STATUS_PARAM)
58: {
59: return (float32)v;
60: }
61:
62: float64 int32_to_float64(int v STATUS_PARAM)
63: {
64: return (float64)v;
65: }
66:
67: #ifdef FLOATX80
68: floatx80 int32_to_floatx80(int v STATUS_PARAM)
69: {
70: return (floatx80)v;
71: }
72: #endif
73: float32 int64_to_float32( int64_t v STATUS_PARAM)
74: {
75: return (float32)v;
76: }
77: float64 int64_to_float64( int64_t v STATUS_PARAM)
78: {
79: return (float64)v;
80: }
81: #ifdef FLOATX80
82: floatx80 int64_to_floatx80( int64_t v STATUS_PARAM)
83: {
84: return (floatx80)v;
85: }
86: #endif
87:
1.1.1.2 root 88: /* XXX: this code implements the x86 behaviour, not the IEEE one. */
89: #if HOST_LONG_BITS == 32
90: static inline int long_to_int32(long a)
91: {
92: return a;
93: }
94: #else
95: static inline int long_to_int32(long a)
96: {
97: if (a != (int32_t)a)
98: a = 0x80000000;
99: return a;
100: }
101: #endif
102:
1.1 root 103: /*----------------------------------------------------------------------------
104: | Software IEC/IEEE single-precision conversion routines.
105: *----------------------------------------------------------------------------*/
106: int float32_to_int32( float32 a STATUS_PARAM)
107: {
1.1.1.2 root 108: return long_to_int32(lrintf(a));
1.1 root 109: }
110: int float32_to_int32_round_to_zero( float32 a STATUS_PARAM)
111: {
112: return (int)a;
113: }
114: int64_t float32_to_int64( float32 a STATUS_PARAM)
115: {
116: return llrintf(a);
117: }
118:
119: int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM)
120: {
121: return (int64_t)a;
122: }
123:
124: float64 float32_to_float64( float32 a STATUS_PARAM)
125: {
126: return a;
127: }
128: #ifdef FLOATX80
129: floatx80 float32_to_floatx80( float32 a STATUS_PARAM)
130: {
131: return a;
132: }
133: #endif
134:
135: /*----------------------------------------------------------------------------
136: | Software IEC/IEEE single-precision operations.
137: *----------------------------------------------------------------------------*/
138: float32 float32_round_to_int( float32 a STATUS_PARAM)
139: {
140: return rintf(a);
141: }
142:
143: float32 float32_rem( float32 a, float32 b STATUS_PARAM)
144: {
145: return remainderf(a, b);
146: }
147:
148: float32 float32_sqrt( float32 a STATUS_PARAM)
149: {
150: return sqrtf(a);
151: }
1.1.1.4 ! root 152: int float32_compare( float32 a, float32 b STATUS_PARAM )
1.1 root 153: {
154: if (a < b) {
155: return -1;
156: } else if (a == b) {
157: return 0;
158: } else if (a > b) {
159: return 1;
160: } else {
161: return 2;
162: }
163: }
1.1.1.4 ! root 164: int float32_compare_quiet( float32 a, float32 b STATUS_PARAM )
1.1 root 165: {
166: if (isless(a, b)) {
167: return -1;
168: } else if (a == b) {
169: return 0;
170: } else if (isgreater(a, b)) {
171: return 1;
172: } else {
173: return 2;
174: }
175: }
1.1.1.4 ! root 176: int float32_is_signaling_nan( float32 a1)
1.1 root 177: {
178: float32u u;
179: uint32_t a;
180: u.f = a1;
181: a = u.i;
182: return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
183: }
184:
185: /*----------------------------------------------------------------------------
186: | Software IEC/IEEE double-precision conversion routines.
187: *----------------------------------------------------------------------------*/
188: int float64_to_int32( float64 a STATUS_PARAM)
189: {
1.1.1.2 root 190: return long_to_int32(lrint(a));
1.1 root 191: }
192: int float64_to_int32_round_to_zero( float64 a STATUS_PARAM)
193: {
194: return (int)a;
195: }
196: int64_t float64_to_int64( float64 a STATUS_PARAM)
197: {
198: return llrint(a);
199: }
200: int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM)
201: {
202: return (int64_t)a;
203: }
204: float32 float64_to_float32( float64 a STATUS_PARAM)
205: {
206: return a;
207: }
208: #ifdef FLOATX80
209: floatx80 float64_to_floatx80( float64 a STATUS_PARAM)
210: {
211: return a;
212: }
213: #endif
214: #ifdef FLOAT128
215: float128 float64_to_float128( float64 a STATUS_PARAM)
216: {
217: return a;
218: }
219: #endif
220:
221: /*----------------------------------------------------------------------------
222: | Software IEC/IEEE double-precision operations.
223: *----------------------------------------------------------------------------*/
1.1.1.4 ! root 224: float64 float64_trunc_to_int( float64 a STATUS_PARAM )
! 225: {
! 226: return trunc(a);
! 227: }
! 228:
1.1 root 229: float64 float64_round_to_int( float64 a STATUS_PARAM )
230: {
231: #if defined(__arm__)
232: switch(STATUS(float_rounding_mode)) {
233: default:
234: case float_round_nearest_even:
235: asm("rndd %0, %1" : "=f" (a) : "f"(a));
236: break;
237: case float_round_down:
238: asm("rnddm %0, %1" : "=f" (a) : "f"(a));
239: break;
240: case float_round_up:
241: asm("rnddp %0, %1" : "=f" (a) : "f"(a));
242: break;
243: case float_round_to_zero:
244: asm("rnddz %0, %1" : "=f" (a) : "f"(a));
245: break;
246: }
247: #else
248: return rint(a);
249: #endif
250: }
251:
252: float64 float64_rem( float64 a, float64 b STATUS_PARAM)
253: {
254: return remainder(a, b);
255: }
256:
257: float64 float64_sqrt( float64 a STATUS_PARAM)
258: {
259: return sqrt(a);
260: }
1.1.1.4 ! root 261: int float64_compare( float64 a, float64 b STATUS_PARAM )
1.1 root 262: {
263: if (a < b) {
264: return -1;
265: } else if (a == b) {
266: return 0;
267: } else if (a > b) {
268: return 1;
269: } else {
270: return 2;
271: }
272: }
1.1.1.4 ! root 273: int float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
1.1 root 274: {
275: if (isless(a, b)) {
276: return -1;
277: } else if (a == b) {
278: return 0;
279: } else if (isgreater(a, b)) {
280: return 1;
281: } else {
282: return 2;
283: }
284: }
1.1.1.4 ! root 285: int float64_is_signaling_nan( float64 a1)
1.1 root 286: {
287: float64u u;
288: uint64_t a;
289: u.f = a1;
290: a = u.i;
291: return
292: ( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
293: && ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
294:
295: }
296:
1.1.1.4 ! root 297: int float64_is_nan( float64 a1 )
! 298: {
! 299: float64u u;
! 300: uint64_t a;
! 301: u.f = a1;
! 302: a = u.i;
! 303:
! 304: return ( LIT64( 0xFFE0000000000000 ) < (bits64) ( a<<1 ) );
! 305:
! 306: }
! 307:
1.1 root 308: #ifdef FLOATX80
309:
310: /*----------------------------------------------------------------------------
311: | Software IEC/IEEE extended double-precision conversion routines.
312: *----------------------------------------------------------------------------*/
313: int floatx80_to_int32( floatx80 a STATUS_PARAM)
314: {
1.1.1.2 root 315: return long_to_int32(lrintl(a));
1.1 root 316: }
317: int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
318: {
319: return (int)a;
320: }
321: int64_t floatx80_to_int64( floatx80 a STATUS_PARAM)
322: {
323: return llrintl(a);
324: }
325: int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM)
326: {
327: return (int64_t)a;
328: }
329: float32 floatx80_to_float32( floatx80 a STATUS_PARAM)
330: {
331: return a;
332: }
333: float64 floatx80_to_float64( floatx80 a STATUS_PARAM)
334: {
335: return a;
336: }
337:
338: /*----------------------------------------------------------------------------
339: | Software IEC/IEEE extended double-precision operations.
340: *----------------------------------------------------------------------------*/
341: floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM)
342: {
343: return rintl(a);
344: }
345: floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM)
346: {
347: return remainderl(a, b);
348: }
349: floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM)
350: {
351: return sqrtl(a);
352: }
1.1.1.4 ! root 353: int floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
1.1 root 354: {
355: if (a < b) {
356: return -1;
357: } else if (a == b) {
358: return 0;
359: } else if (a > b) {
360: return 1;
361: } else {
362: return 2;
363: }
364: }
1.1.1.4 ! root 365: int floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
1.1 root 366: {
367: if (isless(a, b)) {
368: return -1;
369: } else if (a == b) {
370: return 0;
371: } else if (isgreater(a, b)) {
372: return 1;
373: } else {
374: return 2;
375: }
376: }
1.1.1.4 ! root 377: int floatx80_is_signaling_nan( floatx80 a1)
1.1 root 378: {
379: floatx80u u;
380: u.f = a1;
381: return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 );
382: }
383:
384: #endif
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