This source file includes following definitions.
- ieee754_getrm
- ieee754_setrm
- ieee754_getcx
- ieee754_cxtest
- ieee754_getsx
- ieee754_clrsx
- ieee754_sxtest
- ieee754si_indef
- ieee754di_indef
- ieee754si_overflow
- ieee754di_overflow
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12 #ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H
13 #define __ARCH_MIPS_MATH_EMU_IEEE754_H
14
15 #include <linux/compiler.h>
16 #include <asm/byteorder.h>
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/sched.h>
20 #include <asm/bitfield.h>
21
22 union ieee754dp {
23 struct {
24 __BITFIELD_FIELD(unsigned int sign:1,
25 __BITFIELD_FIELD(unsigned int bexp:11,
26 __BITFIELD_FIELD(u64 mant:52,
27 ;)))
28 };
29 u64 bits;
30 };
31
32 union ieee754sp {
33 struct {
34 __BITFIELD_FIELD(unsigned sign:1,
35 __BITFIELD_FIELD(unsigned bexp:8,
36 __BITFIELD_FIELD(unsigned mant:23,
37 ;)))
38 };
39 u32 bits;
40 };
41
42
43
44
45 int ieee754sp_class(union ieee754sp x);
46
47 union ieee754sp ieee754sp_abs(union ieee754sp x);
48 union ieee754sp ieee754sp_neg(union ieee754sp x);
49
50 union ieee754sp ieee754sp_add(union ieee754sp x, union ieee754sp y);
51 union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y);
52 union ieee754sp ieee754sp_mul(union ieee754sp x, union ieee754sp y);
53 union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y);
54
55 union ieee754sp ieee754sp_fint(int x);
56 union ieee754sp ieee754sp_flong(s64 x);
57 union ieee754sp ieee754sp_fdp(union ieee754dp x);
58 union ieee754sp ieee754sp_rint(union ieee754sp x);
59
60 int ieee754sp_tint(union ieee754sp x);
61 s64 ieee754sp_tlong(union ieee754sp x);
62
63 int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cop, int sig);
64
65 union ieee754sp ieee754sp_sqrt(union ieee754sp x);
66
67 union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x,
68 union ieee754sp y);
69 union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
70 union ieee754sp y);
71 int ieee754sp_2008class(union ieee754sp x);
72 union ieee754sp ieee754sp_fmin(union ieee754sp x, union ieee754sp y);
73 union ieee754sp ieee754sp_fmina(union ieee754sp x, union ieee754sp y);
74 union ieee754sp ieee754sp_fmax(union ieee754sp x, union ieee754sp y);
75 union ieee754sp ieee754sp_fmaxa(union ieee754sp x, union ieee754sp y);
76
77
78
79
80 int ieee754dp_class(union ieee754dp x);
81
82 union ieee754dp ieee754dp_add(union ieee754dp x, union ieee754dp y);
83 union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y);
84 union ieee754dp ieee754dp_mul(union ieee754dp x, union ieee754dp y);
85 union ieee754dp ieee754dp_div(union ieee754dp x, union ieee754dp y);
86
87 union ieee754dp ieee754dp_abs(union ieee754dp x);
88 union ieee754dp ieee754dp_neg(union ieee754dp x);
89
90 union ieee754dp ieee754dp_fint(int x);
91 union ieee754dp ieee754dp_flong(s64 x);
92 union ieee754dp ieee754dp_fsp(union ieee754sp x);
93 union ieee754dp ieee754dp_rint(union ieee754dp x);
94
95 int ieee754dp_tint(union ieee754dp x);
96 s64 ieee754dp_tlong(union ieee754dp x);
97
98 int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cop, int sig);
99
100 union ieee754dp ieee754dp_sqrt(union ieee754dp x);
101
102 union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
103 union ieee754dp y);
104 union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
105 union ieee754dp y);
106 int ieee754dp_2008class(union ieee754dp x);
107 union ieee754dp ieee754dp_fmin(union ieee754dp x, union ieee754dp y);
108 union ieee754dp ieee754dp_fmina(union ieee754dp x, union ieee754dp y);
109 union ieee754dp ieee754dp_fmax(union ieee754dp x, union ieee754dp y);
110 union ieee754dp ieee754dp_fmaxa(union ieee754dp x, union ieee754dp y);
111
112
113
114
115 enum {
116 IEEE754_CLASS_NORM = 0x00,
117 IEEE754_CLASS_ZERO = 0x01,
118 IEEE754_CLASS_DNORM = 0x02,
119 IEEE754_CLASS_INF = 0x03,
120 IEEE754_CLASS_SNAN = 0x04,
121 IEEE754_CLASS_QNAN = 0x05,
122 };
123
124
125 #define IEEE754_INEXACT 0x01
126 #define IEEE754_UNDERFLOW 0x02
127 #define IEEE754_OVERFLOW 0x04
128 #define IEEE754_ZERO_DIVIDE 0x08
129 #define IEEE754_INVALID_OPERATION 0x10
130
131
132
133 #define IEEE754_CLT 0x01
134 #define IEEE754_CEQ 0x02
135 #define IEEE754_CGT 0x04
136 #define IEEE754_CUN 0x08
137
138
139
140
141 struct _ieee754_csr {
142 __BITFIELD_FIELD(unsigned fcc:7,
143 __BITFIELD_FIELD(unsigned nod:1,
144 __BITFIELD_FIELD(unsigned c:1,
145 __BITFIELD_FIELD(unsigned pad0:3,
146 __BITFIELD_FIELD(unsigned abs2008:1,
147 __BITFIELD_FIELD(unsigned nan2008:1,
148 __BITFIELD_FIELD(unsigned cx:6,
149 __BITFIELD_FIELD(unsigned mx:5,
150 __BITFIELD_FIELD(unsigned sx:5,
151 __BITFIELD_FIELD(unsigned rm:2,
152 ;))))))))))
153 };
154 #define ieee754_csr (*(struct _ieee754_csr *)(¤t->thread.fpu.fcr31))
155
156 static inline unsigned int ieee754_getrm(void)
157 {
158 return (ieee754_csr.rm);
159 }
160
161 static inline unsigned int ieee754_setrm(unsigned int rm)
162 {
163 return (ieee754_csr.rm = rm);
164 }
165
166
167
168
169 static inline unsigned int ieee754_getcx(void)
170 {
171 return (ieee754_csr.cx);
172 }
173
174
175
176 static inline int ieee754_cxtest(unsigned int n)
177 {
178 return (ieee754_csr.cx & n);
179 }
180
181
182
183
184 static inline unsigned int ieee754_getsx(void)
185 {
186 return (ieee754_csr.sx);
187 }
188
189
190
191 static inline unsigned int ieee754_clrsx(void)
192 {
193 return (ieee754_csr.sx = 0);
194 }
195
196
197
198 static inline int ieee754_sxtest(unsigned int n)
199 {
200 return (ieee754_csr.sx & n);
201 }
202
203
204 union ieee754sp ieee754sp_dump(char *s, union ieee754sp x);
205 union ieee754dp ieee754dp_dump(char *s, union ieee754dp x);
206
207 #define IEEE754_SPCVAL_PZERO 0
208 #define IEEE754_SPCVAL_NZERO 1
209 #define IEEE754_SPCVAL_PONE 2
210 #define IEEE754_SPCVAL_NONE 3
211 #define IEEE754_SPCVAL_PTEN 4
212 #define IEEE754_SPCVAL_NTEN 5
213 #define IEEE754_SPCVAL_PINFINITY 6
214 #define IEEE754_SPCVAL_NINFINITY 7
215 #define IEEE754_SPCVAL_INDEF_LEG 8
216 #define IEEE754_SPCVAL_INDEF_2008 9
217 #define IEEE754_SPCVAL_PMAX 10
218 #define IEEE754_SPCVAL_NMAX 11
219 #define IEEE754_SPCVAL_PMIN 12
220 #define IEEE754_SPCVAL_NMIN 13
221 #define IEEE754_SPCVAL_PMIND 14
222 #define IEEE754_SPCVAL_NMIND 15
223 #define IEEE754_SPCVAL_P1E31 16
224 #define IEEE754_SPCVAL_P1E63 17
225
226 extern const union ieee754dp __ieee754dp_spcvals[];
227 extern const union ieee754sp __ieee754sp_spcvals[];
228 #define ieee754dp_spcvals ((const union ieee754dp *)__ieee754dp_spcvals)
229 #define ieee754sp_spcvals ((const union ieee754sp *)__ieee754sp_spcvals)
230
231
232
233
234 #define ieee754dp_inf(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
235 #define ieee754dp_zero(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
236 #define ieee754dp_one(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
237 #define ieee754dp_ten(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
238 #define ieee754dp_indef() (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
239 ieee754_csr.nan2008])
240 #define ieee754dp_max(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
241 #define ieee754dp_min(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
242 #define ieee754dp_mind(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
243 #define ieee754dp_1e31() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
244 #define ieee754dp_1e63() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])
245
246 #define ieee754sp_inf(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
247 #define ieee754sp_zero(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
248 #define ieee754sp_one(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
249 #define ieee754sp_ten(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
250 #define ieee754sp_indef() (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
251 ieee754_csr.nan2008])
252 #define ieee754sp_max(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
253 #define ieee754sp_min(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
254 #define ieee754sp_mind(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
255 #define ieee754sp_1e31() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
256 #define ieee754sp_1e63() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])
257
258
259
260
261 static inline int ieee754si_indef(void)
262 {
263 return ieee754_csr.nan2008 ? 0 : INT_MAX;
264 }
265
266 static inline s64 ieee754di_indef(void)
267 {
268 return ieee754_csr.nan2008 ? 0 : S64_MAX;
269 }
270
271
272
273
274 static inline int ieee754si_overflow(int xs)
275 {
276 return ieee754_csr.nan2008 && xs ? INT_MIN : INT_MAX;
277 }
278
279 static inline s64 ieee754di_overflow(int xs)
280 {
281 return ieee754_csr.nan2008 && xs ? S64_MIN : S64_MAX;
282 }
283
284
285 #define IEEE754_RT_SP 0
286 #define IEEE754_RT_DP 1
287 #define IEEE754_RT_XP 2
288 #define IEEE754_RT_SI 3
289 #define IEEE754_RT_DI 4
290
291
292 #define ieee754dp_fix(x) ieee754dp_tint(x)
293 #define ieee754sp_fix(x) ieee754sp_tint(x)
294
295 #endif