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1.1 root 1: /* Native implementation of soft float functions */
2: #include <math.h>
3: #if defined(_BSD) && !defined(__APPLE__)
4: #include <ieeefp.h>
5: #else
6: #include <fenv.h>
7: #endif
8:
9: typedef float float32;
10: typedef double float64;
11: #ifdef FLOATX80
12: typedef long double floatx80;
13: #endif
14:
15: typedef union {
16: float32 f;
17: uint32_t i;
18: } float32u;
19: typedef union {
20: float64 f;
21: uint64_t i;
22: } float64u;
23: #ifdef FLOATX80
24: typedef union {
25: floatx80 f;
26: struct {
27: uint64_t low;
28: uint16_t high;
29: } i;
30: } floatx80u;
31: #endif
32:
33: /*----------------------------------------------------------------------------
34: | Software IEC/IEEE floating-point rounding mode.
35: *----------------------------------------------------------------------------*/
36: #if defined(_BSD) && !defined(__APPLE__)
37: enum {
38: float_round_nearest_even = FP_RN,
39: float_round_down = FE_RM,
40: float_round_up = FE_RP,
41: float_round_to_zero = FE_RZ
42: };
43: #elif defined(__arm__)
44: enum {
45: float_round_nearest_even = 0,
46: float_round_down = 1,
47: float_round_up = 2,
48: float_round_to_zero = 3
49: };
50: #else
51: enum {
52: float_round_nearest_even = FE_TONEAREST,
53: float_round_down = FE_DOWNWARD,
54: float_round_up = FE_UPWARD,
55: float_round_to_zero = FE_TOWARDZERO
56: };
57: #endif
58:
59: typedef struct float_status {
60: signed char float_rounding_mode;
61: #ifdef FLOATX80
62: signed char floatx80_rounding_precision;
63: #endif
64: } float_status;
65:
66: void set_float_rounding_mode(int val STATUS_PARAM);
67: #ifdef FLOATX80
68: void set_floatx80_rounding_precision(int val STATUS_PARAM);
69: #endif
70:
71: /*----------------------------------------------------------------------------
72: | Software IEC/IEEE integer-to-floating-point conversion routines.
73: *----------------------------------------------------------------------------*/
74: float32 int32_to_float32( int STATUS_PARAM);
75: float64 int32_to_float64( int STATUS_PARAM);
76: #ifdef FLOATX80
77: floatx80 int32_to_floatx80( int STATUS_PARAM);
78: #endif
79: #ifdef FLOAT128
80: float128 int32_to_float128( int STATUS_PARAM);
81: #endif
82: float32 int64_to_float32( int64_t STATUS_PARAM);
83: float64 int64_to_float64( int64_t STATUS_PARAM);
84: #ifdef FLOATX80
85: floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
86: #endif
87: #ifdef FLOAT128
88: float128 int64_to_float128( int64_t STATUS_PARAM);
89: #endif
90:
91: /*----------------------------------------------------------------------------
92: | Software IEC/IEEE single-precision conversion routines.
93: *----------------------------------------------------------------------------*/
94: int float32_to_int32( float32 STATUS_PARAM);
95: int float32_to_int32_round_to_zero( float32 STATUS_PARAM);
96: int64_t float32_to_int64( float32 STATUS_PARAM);
97: int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM);
98: float64 float32_to_float64( float32 STATUS_PARAM);
99: #ifdef FLOATX80
100: floatx80 float32_to_floatx80( float32 STATUS_PARAM);
101: #endif
102: #ifdef FLOAT128
103: float128 float32_to_float128( float32 STATUS_PARAM);
104: #endif
105:
106: /*----------------------------------------------------------------------------
107: | Software IEC/IEEE single-precision operations.
108: *----------------------------------------------------------------------------*/
109: float32 float32_round_to_int( float32 STATUS_PARAM);
110: INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
111: {
112: return a + b;
113: }
114: INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
115: {
116: return a - b;
117: }
118: INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
119: {
120: return a * b;
121: }
122: INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
123: {
124: return a / b;
125: }
126: float32 float32_rem( float32, float32 STATUS_PARAM);
127: float32 float32_sqrt( float32 STATUS_PARAM);
128: INLINE char float32_eq( float32 a, float32 b STATUS_PARAM)
129: {
130: return a == b;
131: }
132: INLINE char float32_le( float32 a, float32 b STATUS_PARAM)
133: {
134: return a <= b;
135: }
136: INLINE char float32_lt( float32 a, float32 b STATUS_PARAM)
137: {
138: return a < b;
139: }
140: INLINE char float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
141: {
142: return a <= b && a >= b;
143: }
144: INLINE char float32_le_quiet( float32 a, float32 b STATUS_PARAM)
145: {
146: return islessequal(a, b);
147: }
148: INLINE char float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
149: {
150: return isless(a, b);
151: }
152: INLINE char float32_unordered( float32 a, float32 b STATUS_PARAM)
153: {
154: return isunordered(a, b);
155:
156: }
157: char float32_compare( float32, float32 STATUS_PARAM );
158: char float32_compare_quiet( float32, float32 STATUS_PARAM );
159: char float32_is_signaling_nan( float32 );
160:
161: INLINE float32 float32_abs(float32 a)
162: {
163: return fabsf(a);
164: }
165:
166: INLINE float32 float32_chs(float32 a)
167: {
168: return -a;
169: }
170:
171: /*----------------------------------------------------------------------------
172: | Software IEC/IEEE double-precision conversion routines.
173: *----------------------------------------------------------------------------*/
174: int float64_to_int32( float64 STATUS_PARAM );
175: int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
176: int64_t float64_to_int64( float64 STATUS_PARAM );
177: int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
178: float32 float64_to_float32( float64 STATUS_PARAM );
179: #ifdef FLOATX80
180: floatx80 float64_to_floatx80( float64 STATUS_PARAM );
181: #endif
182: #ifdef FLOAT128
183: float128 float64_to_float128( float64 STATUS_PARAM );
184: #endif
185:
186: /*----------------------------------------------------------------------------
187: | Software IEC/IEEE double-precision operations.
188: *----------------------------------------------------------------------------*/
189: float64 float64_round_to_int( float64 STATUS_PARAM );
190: INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
191: {
192: return a + b;
193: }
194: INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
195: {
196: return a - b;
197: }
198: INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
199: {
200: return a * b;
201: }
202: INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
203: {
204: return a / b;
205: }
206: float64 float64_rem( float64, float64 STATUS_PARAM );
207: float64 float64_sqrt( float64 STATUS_PARAM );
208: INLINE char float64_eq( float64 a, float64 b STATUS_PARAM)
209: {
210: return a == b;
211: }
212: INLINE char float64_le( float64 a, float64 b STATUS_PARAM)
213: {
214: return a <= b;
215: }
216: INLINE char float64_lt( float64 a, float64 b STATUS_PARAM)
217: {
218: return a < b;
219: }
220: INLINE char float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
221: {
222: return a <= b && a >= b;
223: }
224: INLINE char float64_le_quiet( float64 a, float64 b STATUS_PARAM)
225: {
226: return islessequal(a, b);
227: }
228: INLINE char float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
229: {
230: return isless(a, b);
231:
232: }
233: INLINE char float64_unordered( float64 a, float64 b STATUS_PARAM)
234: {
235: return isunordered(a, b);
236:
237: }
238: char float64_compare( float64, float64 STATUS_PARAM );
239: char float64_compare_quiet( float64, float64 STATUS_PARAM );
240: char float64_is_signaling_nan( float64 );
241:
242: INLINE float64 float64_abs(float64 a)
243: {
244: return fabs(a);
245: }
246:
247: INLINE float64 float64_chs(float64 a)
248: {
249: return -a;
250: }
251:
252: #ifdef FLOATX80
253:
254: /*----------------------------------------------------------------------------
255: | Software IEC/IEEE extended double-precision conversion routines.
256: *----------------------------------------------------------------------------*/
257: int floatx80_to_int32( floatx80 STATUS_PARAM );
258: int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
259: int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
260: int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
261: float32 floatx80_to_float32( floatx80 STATUS_PARAM );
262: float64 floatx80_to_float64( floatx80 STATUS_PARAM );
263: #ifdef FLOAT128
264: float128 floatx80_to_float128( floatx80 STATUS_PARAM );
265: #endif
266:
267: /*----------------------------------------------------------------------------
268: | Software IEC/IEEE extended double-precision operations.
269: *----------------------------------------------------------------------------*/
270: floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
271: INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
272: {
273: return a + b;
274: }
275: INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
276: {
277: return a - b;
278: }
279: INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
280: {
281: return a * b;
282: }
283: INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
284: {
285: return a / b;
286: }
287: floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
288: floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
289: INLINE char floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
290: {
291: return a == b;
292: }
293: INLINE char floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
294: {
295: return a <= b;
296: }
297: INLINE char floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
298: {
299: return a < b;
300: }
301: INLINE char floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
302: {
303: return a <= b && a >= b;
304: }
305: INLINE char floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
306: {
307: return islessequal(a, b);
308: }
309: INLINE char floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
310: {
311: return isless(a, b);
312:
313: }
314: INLINE char floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
315: {
316: return isunordered(a, b);
317:
318: }
319: char floatx80_compare( floatx80, floatx80 STATUS_PARAM );
320: char floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
321: char floatx80_is_signaling_nan( floatx80 );
322:
323: INLINE floatx80 floatx80_abs(floatx80 a)
324: {
325: return fabsl(a);
326: }
327:
328: INLINE floatx80 floatx80_chs(floatx80 a)
329: {
330: return -a;
331: }
332: #endif
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