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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: }
152: char float32_compare( float32 a, float32 b STATUS_PARAM )
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: }
164: char float32_compare_quiet( float32 a, float32 b STATUS_PARAM )
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: }
176: char float32_is_signaling_nan( float32 a1)
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: *----------------------------------------------------------------------------*/
224: float64 float64_round_to_int( float64 a STATUS_PARAM )
225: {
226: #if defined(__arm__)
227: switch(STATUS(float_rounding_mode)) {
228: default:
229: case float_round_nearest_even:
230: asm("rndd %0, %1" : "=f" (a) : "f"(a));
231: break;
232: case float_round_down:
233: asm("rnddm %0, %1" : "=f" (a) : "f"(a));
234: break;
235: case float_round_up:
236: asm("rnddp %0, %1" : "=f" (a) : "f"(a));
237: break;
238: case float_round_to_zero:
239: asm("rnddz %0, %1" : "=f" (a) : "f"(a));
240: break;
241: }
242: #else
243: return rint(a);
244: #endif
245: }
246:
247: float64 float64_rem( float64 a, float64 b STATUS_PARAM)
248: {
249: return remainder(a, b);
250: }
251:
252: float64 float64_sqrt( float64 a STATUS_PARAM)
253: {
254: return sqrt(a);
255: }
256: char float64_compare( float64 a, float64 b STATUS_PARAM )
257: {
258: if (a < b) {
259: return -1;
260: } else if (a == b) {
261: return 0;
262: } else if (a > b) {
263: return 1;
264: } else {
265: return 2;
266: }
267: }
268: char float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
269: {
270: if (isless(a, b)) {
271: return -1;
272: } else if (a == b) {
273: return 0;
274: } else if (isgreater(a, b)) {
275: return 1;
276: } else {
277: return 2;
278: }
279: }
280: char float64_is_signaling_nan( float64 a1)
281: {
282: float64u u;
283: uint64_t a;
284: u.f = a1;
285: a = u.i;
286: return
287: ( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
288: && ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
289:
290: }
291:
292: #ifdef FLOATX80
293:
294: /*----------------------------------------------------------------------------
295: | Software IEC/IEEE extended double-precision conversion routines.
296: *----------------------------------------------------------------------------*/
297: int floatx80_to_int32( floatx80 a STATUS_PARAM)
298: {
1.1.1.2 root 299: return long_to_int32(lrintl(a));
1.1 root 300: }
301: int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
302: {
303: return (int)a;
304: }
305: int64_t floatx80_to_int64( floatx80 a STATUS_PARAM)
306: {
307: return llrintl(a);
308: }
309: int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM)
310: {
311: return (int64_t)a;
312: }
313: float32 floatx80_to_float32( floatx80 a STATUS_PARAM)
314: {
315: return a;
316: }
317: float64 floatx80_to_float64( floatx80 a STATUS_PARAM)
318: {
319: return a;
320: }
321:
322: /*----------------------------------------------------------------------------
323: | Software IEC/IEEE extended double-precision operations.
324: *----------------------------------------------------------------------------*/
325: floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM)
326: {
327: return rintl(a);
328: }
329: floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM)
330: {
331: return remainderl(a, b);
332: }
333: floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM)
334: {
335: return sqrtl(a);
336: }
337: char floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
338: {
339: if (a < b) {
340: return -1;
341: } else if (a == b) {
342: return 0;
343: } else if (a > b) {
344: return 1;
345: } else {
346: return 2;
347: }
348: }
349: char floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
350: {
351: if (isless(a, b)) {
352: return -1;
353: } else if (a == b) {
354: return 0;
355: } else if (isgreater(a, b)) {
356: return 1;
357: } else {
358: return 2;
359: }
360: }
361: char floatx80_is_signaling_nan( floatx80 a1)
362: {
363: floatx80u u;
364: u.f = a1;
365: return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 );
366: }
367:
368: #endif
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