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Clean up ill-advised or unusual header guards
[qemu/kevin.git] / linux-user / arm / nwfpe / fpopcode.h
blob06cd909850100d6fd87efc9a0d6cf472f1678a1f
1 /*
2 NetWinder Floating Point Emulator
3 (c) Rebel.COM, 1998,1999
4
5 Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #ifndef FPOPCODE_H
22 #define FPOPCODE_H
23
24 /*
25 ARM Floating Point Instruction Classes
26 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
27 |c o n d|1 1 0 P|U|u|W|L| Rn |v| Fd |0|0|0|1| o f f s e t | CPDT
28 |c o n d|1 1 0 P|U|w|W|L| Rn |x| Fd |0|0|0|1| o f f s e t | CPDT
29 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
30 |c o n d|1 1 1 0|a|b|c|d|e| Fn |j| Fd |0|0|0|1|f|g|h|0|i| Fm | CPDO
31 |c o n d|1 1 1 0|a|b|c|L|e| Fn | Rd |0|0|0|1|f|g|h|1|i| Fm | CPRT
32 |c o n d|1 1 1 0|a|b|c|1|e| Fn |1|1|1|1|0|0|0|1|f|g|h|1|i| Fm | comparisons
33 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
34
35 CPDT data transfer instructions
36 LDF, STF, LFM, SFM
37
38 CPDO dyadic arithmetic instructions
39 ADF, MUF, SUF, RSF, DVF, RDF,
40 POW, RPW, RMF, FML, FDV, FRD, POL
41
42 CPDO monadic arithmetic instructions
43 MVF, MNF, ABS, RND, SQT, LOG, LGN, EXP,
44 SIN, COS, TAN, ASN, ACS, ATN, URD, NRM
45
46 CPRT joint arithmetic/data transfer instructions
47 FIX (arithmetic followed by load/store)
48 FLT (load/store followed by arithmetic)
49 CMF, CNF CMFE, CNFE (comparisons)
50 WFS, RFS (write/read floating point status register)
51 WFC, RFC (write/read floating point control register)
52
53 cond condition codes
54 P pre/post index bit: 0 = postindex, 1 = preindex
55 U up/down bit: 0 = stack grows down, 1 = stack grows up
56 W write back bit: 1 = update base register (Rn)
57 L load/store bit: 0 = store, 1 = load
58 Rn base register
59 Rd destination/source register
60 Fd floating point destination register
61 Fn floating point source register
62 Fm floating point source register or floating point constant
63
64 uv transfer length (TABLE 1)
65 wx register count (TABLE 2)
66 abcd arithmetic opcode (TABLES 3 & 4)
67 ef destination size (rounding precision) (TABLE 5)
68 gh rounding mode (TABLE 6)
69 j dyadic/monadic bit: 0 = dyadic, 1 = monadic
70 i constant bit: 1 = constant (TABLE 6)
71 */
72
73 /*
74 TABLE 1
75 +-------------------------+---+---+---------+---------+
76 | Precision | u | v | FPSR.EP | length |
77 +-------------------------+---+---+---------+---------+
78 | Single | 0 | 0 | x | 1 words |
79 | Double | 1 | 1 | x | 2 words |
80 | Extended | 1 | 1 | x | 3 words |
81 | Packed decimal | 1 | 1 | 0 | 3 words |
82 | Expanded packed decimal | 1 | 1 | 1 | 4 words |
83 +-------------------------+---+---+---------+---------+
84 Note: x = don't care
85 */
86
87 /*
88 TABLE 2
89 +---+---+---------------------------------+
90 | w | x | Number of registers to transfer |
91 +---+---+---------------------------------+
92 | 0 | 1 | 1 |
93 | 1 | 0 | 2 |
94 | 1 | 1 | 3 |
95 | 0 | 0 | 4 |
96 +---+---+---------------------------------+
97 */
98
99 /*
100 TABLE 3: Dyadic Floating Point Opcodes
101 +---+---+---+---+----------+-----------------------+-----------------------+
102 | a | b | c | d | Mnemonic | Description | Operation |
103 +---+---+---+---+----------+-----------------------+-----------------------+
104 | 0 | 0 | 0 | 0 | ADF | Add | Fd := Fn + Fm |
105 | 0 | 0 | 0 | 1 | MUF | Multiply | Fd := Fn * Fm |
106 | 0 | 0 | 1 | 0 | SUF | Subtract | Fd := Fn - Fm |
107 | 0 | 0 | 1 | 1 | RSF | Reverse subtract | Fd := Fm - Fn |
108 | 0 | 1 | 0 | 0 | DVF | Divide | Fd := Fn / Fm |
109 | 0 | 1 | 0 | 1 | RDF | Reverse divide | Fd := Fm / Fn |
110 | 0 | 1 | 1 | 0 | POW | Power | Fd := Fn ^ Fm |
111 | 0 | 1 | 1 | 1 | RPW | Reverse power | Fd := Fm ^ Fn |
112 | 1 | 0 | 0 | 0 | RMF | Remainder | Fd := IEEE rem(Fn/Fm) |
113 | 1 | 0 | 0 | 1 | FML | Fast Multiply | Fd := Fn * Fm |
114 | 1 | 0 | 1 | 0 | FDV | Fast Divide | Fd := Fn / Fm |
115 | 1 | 0 | 1 | 1 | FRD | Fast reverse divide | Fd := Fm / Fn |
116 | 1 | 1 | 0 | 0 | POL | Polar angle (ArcTan2) | Fd := arctan2(Fn,Fm) |
117 | 1 | 1 | 0 | 1 | | undefined instruction | trap |
118 | 1 | 1 | 1 | 0 | | undefined instruction | trap |
119 | 1 | 1 | 1 | 1 | | undefined instruction | trap |
120 +---+---+---+---+----------+-----------------------+-----------------------+
121 Note: POW, RPW, POL are deprecated, and are available for backwards
122 compatibility only.
123 */
124
125 /*
126 TABLE 4: Monadic Floating Point Opcodes
127 +---+---+---+---+----------+-----------------------+-----------------------+
128 | a | b | c | d | Mnemonic | Description | Operation |
129 +---+---+---+---+----------+-----------------------+-----------------------+
130 | 0 | 0 | 0 | 0 | MVF | Move | Fd := Fm |
131 | 0 | 0 | 0 | 1 | MNF | Move negated | Fd := - Fm |
132 | 0 | 0 | 1 | 0 | ABS | Absolute value | Fd := abs(Fm) |
133 | 0 | 0 | 1 | 1 | RND | Round to integer | Fd := int(Fm) |
134 | 0 | 1 | 0 | 0 | SQT | Square root | Fd := sqrt(Fm) |
135 | 0 | 1 | 0 | 1 | LOG | Log base 10 | Fd := log10(Fm) |
136 | 0 | 1 | 1 | 0 | LGN | Log base e | Fd := ln(Fm) |
137 | 0 | 1 | 1 | 1 | EXP | Exponent | Fd := e ^ Fm |
138 | 1 | 0 | 0 | 0 | SIN | Sine | Fd := sin(Fm) |
139 | 1 | 0 | 0 | 1 | COS | Cosine | Fd := cos(Fm) |
140 | 1 | 0 | 1 | 0 | TAN | Tangent | Fd := tan(Fm) |
141 | 1 | 0 | 1 | 1 | ASN | Arc Sine | Fd := arcsin(Fm) |
142 | 1 | 1 | 0 | 0 | ACS | Arc Cosine | Fd := arccos(Fm) |
143 | 1 | 1 | 0 | 1 | ATN | Arc Tangent | Fd := arctan(Fm) |
144 | 1 | 1 | 1 | 0 | URD | Unnormalized round | Fd := int(Fm) |
145 | 1 | 1 | 1 | 1 | NRM | Normalize | Fd := norm(Fm) |
146 +---+---+---+---+----------+-----------------------+-----------------------+
147 Note: LOG, LGN, EXP, SIN, COS, TAN, ASN, ACS, ATN are deprecated, and are
148 available for backwards compatibility only.
149 */
150
151 /*
152 TABLE 5
153 +-------------------------+---+---+
154 | Rounding Precision | e | f |
155 +-------------------------+---+---+
156 | IEEE Single precision | 0 | 0 |
157 | IEEE Double precision | 0 | 1 |
158 | IEEE Extended precision | 1 | 0 |
159 | undefined (trap) | 1 | 1 |
160 +-------------------------+---+---+
161 */
162
163 /*
164 TABLE 5
165 +---------------------------------+---+---+
166 | Rounding Mode | g | h |
167 +---------------------------------+---+---+
168 | Round to nearest (default) | 0 | 0 |
169 | Round toward plus infinity | 0 | 1 |
170 | Round toward negative infinity | 1 | 0 |
171 | Round toward zero | 1 | 1 |
172 +---------------------------------+---+---+
173 */
174
175 /*
176 ===
177 === Definitions for load and store instructions
178 ===
179 */
180
181 /* bit masks */
182 #define BIT_PREINDEX 0x01000000
183 #define BIT_UP 0x00800000
184 #define BIT_WRITE_BACK 0x00200000
185 #define BIT_LOAD 0x00100000
186
187 /* masks for load/store */
188 #define MASK_CPDT 0x0c000000 /* data processing opcode */
189 #define MASK_OFFSET 0x000000ff
190 #define MASK_TRANSFER_LENGTH 0x00408000
191 #define MASK_REGISTER_COUNT MASK_TRANSFER_LENGTH
192 #define MASK_COPROCESSOR 0x00000f00
193
194 /* Tests for transfer length */
195 #define TRANSFER_SINGLE 0x00000000
196 #define TRANSFER_DOUBLE 0x00008000
197 #define TRANSFER_EXTENDED 0x00400000
198 #define TRANSFER_PACKED MASK_TRANSFER_LENGTH
199
200 /* Get the coprocessor number from the opcode. */
201 #define getCoprocessorNumber(opcode) ((opcode & MASK_COPROCESSOR) >> 8)
202
203 /* Get the offset from the opcode. */
204 #define getOffset(opcode) (opcode & MASK_OFFSET)
205
206 /* Tests for specific data transfer load/store opcodes. */
207 #define TEST_OPCODE(opcode,mask) (((opcode) & (mask)) == (mask))
208
209 #define LOAD_OP(opcode) TEST_OPCODE((opcode),MASK_CPDT | BIT_LOAD)
210 #define STORE_OP(opcode) ((opcode & (MASK_CPDT | BIT_LOAD)) == MASK_CPDT)
211
212 #define LDF_OP(opcode) (LOAD_OP(opcode) && (getCoprocessorNumber(opcode) == 1))
213 #define LFM_OP(opcode) (LOAD_OP(opcode) && (getCoprocessorNumber(opcode) == 2))
214 #define STF_OP(opcode) (STORE_OP(opcode) && (getCoprocessorNumber(opcode) == 1))
215 #define SFM_OP(opcode) (STORE_OP(opcode) && (getCoprocessorNumber(opcode) == 2))
216
217 #define PREINDEXED(opcode) ((opcode & BIT_PREINDEX) != 0)
218 #define POSTINDEXED(opcode) ((opcode & BIT_PREINDEX) == 0)
219 #define BIT_UP_SET(opcode) ((opcode & BIT_UP) != 0)
220 #define BIT_UP_CLEAR(opcode) ((opcode & BIT_DOWN) == 0)
221 #define WRITE_BACK(opcode) ((opcode & BIT_WRITE_BACK) != 0)
222 #define LOAD(opcode) ((opcode & BIT_LOAD) != 0)
223 #define STORE(opcode) ((opcode & BIT_LOAD) == 0)
224
225 /*
226 ===
227 === Definitions for arithmetic instructions
228 ===
229 */
230 /* bit masks */
231 #define BIT_MONADIC 0x00008000
232 #define BIT_CONSTANT 0x00000008
233
234 #define CONSTANT_FM(opcode) ((opcode & BIT_CONSTANT) != 0)
235 #define MONADIC_INSTRUCTION(opcode) ((opcode & BIT_MONADIC) != 0)
236
237 /* instruction identification masks */
238 #define MASK_CPDO 0x0e000000 /* arithmetic opcode */
239 #define MASK_ARITHMETIC_OPCODE 0x00f08000
240 #define MASK_DESTINATION_SIZE 0x00080080
241
242 /* dyadic arithmetic opcodes. */
243 #define ADF_CODE 0x00000000
244 #define MUF_CODE 0x00100000
245 #define SUF_CODE 0x00200000
246 #define RSF_CODE 0x00300000
247 #define DVF_CODE 0x00400000
248 #define RDF_CODE 0x00500000
249 #define POW_CODE 0x00600000
250 #define RPW_CODE 0x00700000
251 #define RMF_CODE 0x00800000
252 #define FML_CODE 0x00900000
253 #define FDV_CODE 0x00a00000
254 #define FRD_CODE 0x00b00000
255 #define POL_CODE 0x00c00000
256 /* 0x00d00000 is an invalid dyadic arithmetic opcode */
257 /* 0x00e00000 is an invalid dyadic arithmetic opcode */
258 /* 0x00f00000 is an invalid dyadic arithmetic opcode */
259
260 /* monadic arithmetic opcodes. */
261 #define MVF_CODE 0x00008000
262 #define MNF_CODE 0x00108000
263 #define ABS_CODE 0x00208000
264 #define RND_CODE 0x00308000
265 #define SQT_CODE 0x00408000
266 #define LOG_CODE 0x00508000
267 #define LGN_CODE 0x00608000
268 #define EXP_CODE 0x00708000
269 #define SIN_CODE 0x00808000
270 #define COS_CODE 0x00908000
271 #define TAN_CODE 0x00a08000
272 #define ASN_CODE 0x00b08000
273 #define ACS_CODE 0x00c08000
274 #define ATN_CODE 0x00d08000
275 #define URD_CODE 0x00e08000
276 #define NRM_CODE 0x00f08000
277
278 /*
279 ===
280 === Definitions for register transfer and comparison instructions
281 ===
282 */
283
284 #define MASK_CPRT 0x0e000010 /* register transfer opcode */
285 #define MASK_CPRT_CODE 0x00f00000
286 #define FLT_CODE 0x00000000
287 #define FIX_CODE 0x00100000
288 #define WFS_CODE 0x00200000
289 #define RFS_CODE 0x00300000
290 #define WFC_CODE 0x00400000
291 #define RFC_CODE 0x00500000
292 #define CMF_CODE 0x00900000
293 #define CNF_CODE 0x00b00000
294 #define CMFE_CODE 0x00d00000
295 #define CNFE_CODE 0x00f00000
296
297 /*
298 ===
299 === Common definitions
300 ===
301 */
302
303 /* register masks */
304 #define MASK_Rd 0x0000f000
305 #define MASK_Rn 0x000f0000
306 #define MASK_Fd 0x00007000
307 #define MASK_Fm 0x00000007
308 #define MASK_Fn 0x00070000
309
310 /* condition code masks */
311 #define CC_MASK 0xf0000000
312 #define CC_NEGATIVE 0x80000000
313 #define CC_ZERO 0x40000000
314 #define CC_CARRY 0x20000000
315 #define CC_OVERFLOW 0x10000000
316 #define CC_EQ 0x00000000
317 #define CC_NE 0x10000000
318 #define CC_CS 0x20000000
319 #define CC_HS CC_CS
320 #define CC_CC 0x30000000
321 #define CC_LO CC_CC
322 #define CC_MI 0x40000000
323 #define CC_PL 0x50000000
324 #define CC_VS 0x60000000
325 #define CC_VC 0x70000000
326 #define CC_HI 0x80000000
327 #define CC_LS 0x90000000
328 #define CC_GE 0xa0000000
329 #define CC_LT 0xb0000000
330 #define CC_GT 0xc0000000
331 #define CC_LE 0xd0000000
332 #define CC_AL 0xe0000000
333 #define CC_NV 0xf0000000
334
335 /* rounding masks/values */
336 #define MASK_ROUNDING_MODE 0x00000060
337 #define ROUND_TO_NEAREST 0x00000000
338 #define ROUND_TO_PLUS_INFINITY 0x00000020
339 #define ROUND_TO_MINUS_INFINITY 0x00000040
340 #define ROUND_TO_ZERO 0x00000060
341
342 #define MASK_ROUNDING_PRECISION 0x00080080
343 #define ROUND_SINGLE 0x00000000
344 #define ROUND_DOUBLE 0x00000080
345 #define ROUND_EXTENDED 0x00080000
346
347 /* Get the condition code from the opcode. */
348 #define getCondition(opcode) (opcode >> 28)
349
350 /* Get the source register from the opcode. */
351 #define getRn(opcode) ((opcode & MASK_Rn) >> 16)
352
353 /* Get the destination floating point register from the opcode. */
354 #define getFd(opcode) ((opcode & MASK_Fd) >> 12)
355
356 /* Get the first source floating point register from the opcode. */
357 #define getFn(opcode) ((opcode & MASK_Fn) >> 16)
358
359 /* Get the second source floating point register from the opcode. */
360 #define getFm(opcode) (opcode & MASK_Fm)
361
362 /* Get the destination register from the opcode. */
363 #define getRd(opcode) ((opcode & MASK_Rd) >> 12)
364
365 /* Get the rounding mode from the opcode. */
366 #define getRoundingMode(opcode) ((opcode & MASK_ROUNDING_MODE) >> 5)
367
368 extern const floatx80 floatx80Constant[];
369 extern const float64 float64Constant[];
370 extern const float32 float32Constant[];
371
372 static inline floatx80 getExtendedConstant(const unsigned int nIndex)
373 {
374 return floatx80Constant[nIndex];
375 }
376
377 static inline float64 getDoubleConstant(const unsigned int nIndex)
378 {
379 return float64Constant[nIndex];
380 }
381
382 static inline float32 getSingleConstant(const unsigned int nIndex)
383 {
384 return float32Constant[nIndex];
385 }
386
387 unsigned int getRegisterCount(const unsigned int opcode);
388 unsigned int getDestinationSize(const unsigned int opcode);
389
390 #endif
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