1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* CGEN fpu support
Copyright (C) 1999 Cygnus Solutions.
Copyright (C) 2010 Doug Evans. */
#ifndef CGEN_FPU_H
#define CGEN_FPU_H
/* Floating point support is a little more complicated.
We want to support using either host fp insns or an accurate fp library.
We also want to support easily added variants (e.g. modified ieee).
This is done by vectoring all calls through a table. */
typedef USI SF;
typedef UDI DF;
typedef struct { SI parts[3]; } XF;
typedef struct { SI parts[4]; } TF;
#ifndef TARGET_EXT_FP_WORDS
#define TARGET_EXT_FP_WORDS 4
#endif
/* Supported floating point conversion kinds (rounding modes).
FIXME: The IEEE rounding modes need to be implemented. */
typedef enum {
FPCONV_DEFAULT = 0,
FPCONV_TIES_TO_EVEN = 1,
FPCONV_TIES_TO_AWAY = 2,
FPCONV_TOWARD_ZERO = 3,
FPCONV_TOWARD_POSITIVE = 4,
FPCONV_TOWARD_NEGATIVE = 5
} CGEN_FPCONV_KIND;
/* forward decl */
typedef struct cgen_fp_ops CGEN_FP_OPS;
/* Instance of an fpu. */
typedef struct {
/* Usually a pointer back to the SIM_CPU struct. */
void* owner;
/* Pointer to ops struct, rather than copy of it, to avoid bloating
SIM_CPU struct. */
CGEN_FP_OPS* ops;
} CGEN_FPU;
/* result of cmp */
typedef enum {
/* ??? May wish to distinguish qnan/snan here. */
FP_CMP_EQ, FP_CMP_LT, FP_CMP_GT, FP_CMP_NAN
} CGEN_FP_CMP;
/* error handler */
typedef void (CGEN_FPU_ERROR_FN) (CGEN_FPU*, int);
/* fpu operation table */
struct cgen_fp_ops {
/* error (e.g. signalling nan) handler, supplied by owner */
CGEN_FPU_ERROR_FN *error;
/* basic SF ops */
SF (*addsf) (CGEN_FPU*, SF, SF);
SF (*subsf) (CGEN_FPU*, SF, SF);
SF (*mulsf) (CGEN_FPU*, SF, SF);
SF (*divsf) (CGEN_FPU*, SF, SF);
SF (*remsf) (CGEN_FPU*, SF, SF);
SF (*negsf) (CGEN_FPU*, SF);
SF (*abssf) (CGEN_FPU*, SF);
SF (*sqrtsf) (CGEN_FPU*, SF);
SF (*invsf) (CGEN_FPU*, SF);
SF (*cossf) (CGEN_FPU*, SF);
SF (*sinsf) (CGEN_FPU*, SF);
SF (*minsf) (CGEN_FPU*, SF, SF);
SF (*maxsf) (CGEN_FPU*, SF, SF);
/* ??? to be revisited */
CGEN_FP_CMP (*cmpsf) (CGEN_FPU*, SF, SF);
int (*eqsf) (CGEN_FPU*, SF, SF);
int (*nesf) (CGEN_FPU*, SF, SF);
int (*ltsf) (CGEN_FPU*, SF, SF);
int (*lesf) (CGEN_FPU*, SF, SF);
int (*gtsf) (CGEN_FPU*, SF, SF);
int (*gesf) (CGEN_FPU*, SF, SF);
/* basic DF ops */
DF (*adddf) (CGEN_FPU*, DF, DF);
DF (*subdf) (CGEN_FPU*, DF, DF);
DF (*muldf) (CGEN_FPU*, DF, DF);
DF (*divdf) (CGEN_FPU*, DF, DF);
DF (*remdf) (CGEN_FPU*, DF, DF);
DF (*negdf) (CGEN_FPU*, DF);
DF (*absdf) (CGEN_FPU*, DF);
DF (*sqrtdf) (CGEN_FPU*, DF);
DF (*invdf) (CGEN_FPU*, DF);
DF (*cosdf) (CGEN_FPU*, DF);
DF (*sindf) (CGEN_FPU*, DF);
DF (*mindf) (CGEN_FPU*, DF, DF);
DF (*maxdf) (CGEN_FPU*, DF, DF);
/* ??? to be revisited */
CGEN_FP_CMP (*cmpdf) (CGEN_FPU*, DF, DF);
int (*eqdf) (CGEN_FPU*, DF, DF);
int (*nedf) (CGEN_FPU*, DF, DF);
int (*ltdf) (CGEN_FPU*, DF, DF);
int (*ledf) (CGEN_FPU*, DF, DF);
int (*gtdf) (CGEN_FPU*, DF, DF);
int (*gedf) (CGEN_FPU*, DF, DF);
/* SF/DF conversion ops */
DF (*fextsfdf) (CGEN_FPU*, int, SF);
SF (*ftruncdfsf) (CGEN_FPU*, int, DF);
SF (*floatsisf) (CGEN_FPU*, int, SI);
SF (*floatdisf) (CGEN_FPU*, int, DI);
SF (*ufloatsisf) (CGEN_FPU*, int, USI);
SF (*ufloatdisf) (CGEN_FPU*, int, UDI);
SI (*fixsfsi) (CGEN_FPU*, int, SF);
DI (*fixsfdi) (CGEN_FPU*, int, SF);
USI (*ufixsfsi) (CGEN_FPU*, int, SF);
UDI (*ufixsfdi) (CGEN_FPU*, int, SF);
DF (*floatsidf) (CGEN_FPU*, int, SI);
DF (*floatdidf) (CGEN_FPU*, int, DI);
DF (*ufloatsidf) (CGEN_FPU*, int, USI);
DF (*ufloatdidf) (CGEN_FPU*, int, UDI);
SI (*fixdfsi) (CGEN_FPU*, int, DF);
DI (*fixdfdi) (CGEN_FPU*, int, DF);
USI (*ufixdfsi) (CGEN_FPU*, int, DF);
UDI (*ufixdfdi) (CGEN_FPU*, int, DF);
/* XF mode support (kept separate 'cus not always present) */
XF (*addxf) (CGEN_FPU*, XF, XF);
XF (*subxf) (CGEN_FPU*, XF, XF);
XF (*mulxf) (CGEN_FPU*, XF, XF);
XF (*divxf) (CGEN_FPU*, XF, XF);
XF (*remxf) (CGEN_FPU*, XF, XF);
XF (*negxf) (CGEN_FPU*, XF);
XF (*absxf) (CGEN_FPU*, XF);
XF (*sqrtxf) (CGEN_FPU*, XF);
XF (*invxf) (CGEN_FPU*, XF);
XF (*cosxf) (CGEN_FPU*, XF);
XF (*sinxf) (CGEN_FPU*, XF);
XF (*minxf) (CGEN_FPU*, XF, XF);
XF (*maxxf) (CGEN_FPU*, XF, XF);
CGEN_FP_CMP (*cmpxf) (CGEN_FPU*, XF, XF);
int (*eqxf) (CGEN_FPU*, XF, XF);
int (*nexf) (CGEN_FPU*, XF, XF);
int (*ltxf) (CGEN_FPU*, XF, XF);
int (*lexf) (CGEN_FPU*, XF, XF);
int (*gtxf) (CGEN_FPU*, XF, XF);
int (*gexf) (CGEN_FPU*, XF, XF);
XF (*extsfxf) (CGEN_FPU*, int, SF);
XF (*extdfxf) (CGEN_FPU*, int, DF);
SF (*truncxfsf) (CGEN_FPU*, int, XF);
DF (*truncxfdf) (CGEN_FPU*, int, XF);
XF (*floatsixf) (CGEN_FPU*, int, SI);
XF (*floatdixf) (CGEN_FPU*, int, DI);
XF (*ufloatsixf) (CGEN_FPU*, int, USI);
XF (*ufloatdixf) (CGEN_FPU*, int, UDI);
SI (*fixxfsi) (CGEN_FPU*, int, XF);
DI (*fixxfdi) (CGEN_FPU*, int, XF);
USI (*ufixxfsi) (CGEN_FPU*, int, XF);
UDI (*ufixxfdi) (CGEN_FPU*, int, XF);
/* TF mode support (kept separate 'cus not always present) */
TF (*addtf) (CGEN_FPU*, TF, TF);
TF (*subtf) (CGEN_FPU*, TF, TF);
TF (*multf) (CGEN_FPU*, TF, TF);
TF (*divtf) (CGEN_FPU*, TF, TF);
TF (*remtf) (CGEN_FPU*, TF, TF);
TF (*negtf) (CGEN_FPU*, TF);
TF (*abstf) (CGEN_FPU*, TF);
TF (*sqrttf) (CGEN_FPU*, TF);
TF (*invtf) (CGEN_FPU*, TF);
TF (*costf) (CGEN_FPU*, TF);
TF (*sintf) (CGEN_FPU*, TF);
TF (*mintf) (CGEN_FPU*, TF, TF);
TF (*maxtf) (CGEN_FPU*, TF, TF);
CGEN_FP_CMP (*cmptf) (CGEN_FPU*, TF, TF);
int (*eqtf) (CGEN_FPU*, TF, TF);
int (*netf) (CGEN_FPU*, TF, TF);
int (*lttf) (CGEN_FPU*, TF, TF);
int (*letf) (CGEN_FPU*, TF, TF);
int (*gttf) (CGEN_FPU*, TF, TF);
int (*getf) (CGEN_FPU*, TF, TF);
TF (*extsftf) (CGEN_FPU*, int, SF);
TF (*extdftf) (CGEN_FPU*, int, DF);
SF (*trunctfsf) (CGEN_FPU*, int, TF);
DF (*trunctfdf) (CGEN_FPU*, int, TF);
TF (*floatsitf) (CGEN_FPU*, int, SI);
TF (*floatditf) (CGEN_FPU*, int, DI);
TF (*ufloatsitf) (CGEN_FPU*, int, USI);
TF (*ufloatditf) (CGEN_FPU*, int, UDI);
SI (*fixtfsi) (CGEN_FPU*, int, TF);
DI (*fixtfdi) (CGEN_FPU*, int, TF);
USI (*ufixtfsi) (CGEN_FPU*, int, TF);
UDI (*ufixtfdi) (CGEN_FPU*, int, TF);
};
extern void cgen_init_accurate_fpu (SIM_CPU*, CGEN_FPU*, CGEN_FPU_ERROR_FN*);
BI cgen_sf_snan_p (CGEN_FPU*, SF);
BI cgen_df_snan_p (CGEN_FPU*, DF);
/* no-op fp error handler */
extern CGEN_FPU_ERROR_FN cgen_fpu_ignore_errors;
#endif /* CGEN_FPU_H */
|
