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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
/// The fast integer power
/// The shortest addition chains,n[0,58]
fn possac(x: f64, n: i32) -> f64 {
let mut x2: f64;
let mut x3: f64;
let mut x4: f64;
let mut x5: f64;
let mut x6: f64;
let mut x7: f64;
let mut x8: f64;
let mut x9: f64;
let mut x10: f64;
let mut x11: f64;
let mut x12: f64;
let mut x13: f64;
let mut x14: f64;
let mut x15: f64;
let mut x16: f64;
let mut x17: f64;
let mut x18: f64;
let mut x19: f64;
let mut x20: f64;
let mut x21: f64;
let mut x22: f64;
let mut x23: f64;
let mut x24: f64;
let mut x25: f64;
let mut x26: f64;
let mut x27: f64;
let mut x28: f64;
let mut x29: f64;
let mut x32: f64;
let mut x33: f64;
let mut x36: f64;
let mut x37: f64;
let mut x46: f64;
let mut x48: f64;
let mut x49: f64;
let mut x54: f64;
match n {
0 => 1.0,
1 => x,
2 => x * x,
3 => {
x2 = x * x;
return x2 * x;
}
4 => {
x2 = x * x;
return x2 * x2;
}
5 => {
x2 = x * x;
x3 = x2 * x;
return x2 * x3;
}
6 => {
x2 = x * x;
x3 = x2 * x;
return x3 * x3;
}
7 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
return x5 * x2;
}
8 => {
x2 = x * x;
x4 = x2 * x2;
return x4 * x4;
}
9 => {
x2 = x * x;
x4 = x2 * x2;
return x * x4 * x4;
}
10 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
return x5 * x5;
}
11 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
return x5 * x5 * x;
}
12 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
return x6 * x6;
}
13 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
return x8 * x4 * x;
}
14 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x7 = x5 * x2;
return x7 * x7;
}
15 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
return x6 * x6 * x3;
}
16 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
return x8 * x8;
}
17 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
return x8 * x8 * x;
}
18 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
return x16 * x2;
}
19 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
return x16 * x2 * x;
}
20 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x10 = x5 * x5;
return x10 * x10;
}
21 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
return x12 * x6 * x3;
}
22 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x10 = x5 * x5;
return x10 * x10 * x2;
}
23 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x10 = x5 * x5;
return x10 * x10 * x3;
}
24 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
return x12 * x12;
}
25 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
return x9 * x8 * x8;
}
26 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x13 = x9 * x4;
return x13 * x13;
}
27 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
return x12 * x12 * x3;
}
28 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x7 = x5 * x2;
x14 = x7 * x7;
return x14 * x14;
}
29 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x17 = x8 * x9;
return x17 * x8 * x4;
}
30 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x15 = x12 * x3;
return x15 * x15;
}
31 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x7 = x5 * x2;
x14 = x7 * x7;
return x14 * x14 * x3;
}
32 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
return x16 * x16;
}
33 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
return x16 * x16 * x;
}
34 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x17 = x8 * x9;
return x17 * x17;
}
35 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x13 = x4 * x9;
return x13 * x13 * x9;
}
36 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x18 = x8 * x8 * x2;
return x18 * x18;
}
37 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x18 = x8 * x8 * x2;
return x18 * x18 * x;
}
38 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
x18 = x16 * x2;
x19 = x18 * x;
return x19 * x19;
}
39 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x24 = x12 * x12;
return x24 * x12 * x3;
}
40 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x10 = x5 * x5;
x20 = x10 * x10;
return x20 * x20;
}
41 => {
x2 = x * x;
x3 = x2 * x;
x5 = x3 * x2;
x10 = x5 * x5;
x20 = x10 * x10;
return x20 * x20 * x;
}
42 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x21 = x12 * x3 * x6;
return x21 * x21;
}
43 => {
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x17 = x8 * x9;
return x17 * x17 * x9;
}
44 => {
x2 = x * x;
x3 = x2 * x;
x5 = x2 * x3;
x11 = x5 * x5 * x;
x22 = x11 * x11;
return x22 * x22;
}
45 => {
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x15 = x12 * x3;
return x15 * x15 * x15;
}
46 => {
x2 = x * x;
x3 = x2 * x;
x5 = x2 * x3;
x10 = x5 * x5;
x20 = x10 * x10;
x23 = x20 * x3;
return x23 * x23;
}
47=>{
x2 = x * x;
x3 = x2 * x;
x5 = x2 * x3;
x10 = x5 * x5;
x20 = x10 * x10;
x23 = x20 * x3;
x46 = x23 * x23;
return x46 * x;
}
48=>{
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x24 = x12 * x12;
return x24 * x24;
}
49=>{
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
x32 = x16 * x16;
x33 = x32 * x;
return x33 * x16;
}
50=>{
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x17 = x8 * x9;
x25 = x17 * x8;
return x25 * x25
}
51=>{
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x24 = x12 * x12;
x48 = x24 * x24;
return x48 * x3;
}
52=>{
x2 = x * x;
x4 = x2 * x2;
x5 = x4 * x;
x8 = x4 * x4;
x13 = x8 * x5;
x26 = x13 * x13;
return x26 * x26;
}
53=>{ x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
x18 = x16 * x2;
x36 = x18 * x18;
x37 = x36 * x;
return x37 * x16;
}
54=>{
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x24 = x12 * x12;
x27 = x24 * x3;
return x27 * x27;
}
55=>{
x2 = x * x;
x3 = x2 * x;
x6 = x3 * x3;
x12 = x6 * x6;
x24 = x12 * x12;
x27 = x24 * x3;
x54 = x27 * x27;
return x54 * x;
}
56=>{
x2 = x * x;
x3 = x2 * x;
x4 = x2 * x2;
x7 = x4 * x3;
x14 = x7 * x7;
x28 = x14 * x14;
return x28 * x28;
}
57=>{ x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x16 = x8 * x8;
x32 = x16 * x16;
x33 = x32 * x;
x49 = x33 * x16;
return x49 * x8;
}
58=>{
x2 = x * x;
x4 = x2 * x2;
x8 = x4 * x4;
x9 = x8 * x;
x17 = x8 * x9;
x25 = x17 * x8;
x29 = x25 * x4;
return x29 * x29;
}
_ => x.powi(n)
}
}
pub fn sac_pow(x: f64, n: i32) -> f64 {
if n >= 0 {
return possac(x, n);
} else {
return 1.0 / possac(x, -n);
}
}