| /* |
| * Compressed floating-point Twiddle Factor. |
| * |
| * This file implements the non-inline functions declared in |
| * fpr.h, as well as the constants for FFT / iFFT. |
| * |
| * ============================================================================= |
| * Copyright (c) 2023 by Cryptographic Engineering Research Group (CERG) |
| * ECE Department, George Mason University |
| * Fairfax, VA, U.S.A. |
| * Author: Duc Tri Nguyen |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * ============================================================================= |
| * @author Duc Tri Nguyen <[email protected]>, <[email protected]> |
| */ |
| |
| #include "inner.h" |
| |
| const fpr fpr_p2_tab[] = { |
| 2.00000000000, |
| 1.00000000000, |
| 0.50000000000, |
| 0.25000000000, |
| 0.12500000000, |
| 0.06250000000, |
| 0.03125000000, |
| 0.01562500000, |
| 0.00781250000, |
| 0.00390625000, |
| 0.00195312500 |
| }; |
| |
| const fpr fpr_tab_log2[] = { |
| 0.707106781186547524400844362, 0.707106781186547524400844362, // 4, 5 |
| }; |
| |
| const fpr fpr_tab_log3[] = { |
| 0.923879532511286756128183189, 0.382683432365089771728459984, // 8, 9 |
| -0.382683432365089771728459984, 0.923879532511286756128183189, |
| }; |
| |
| const fpr fpr_tab_log4[] = { |
| 0.980785280403230449126182236, 0.195090322016128267848284868, // 16 |
| 0.555570233019602224742830814, 0.831469612302545237078788378, // 20 |
| }; |
| |
| const fpr fpr_tab_log5[] = { |
| 0.995184726672196886244836953, 0.098017140329560601994195564, // 32 |
| 0.634393284163645498215171613, 0.773010453362736960810906610, // 36 |
| 0.881921264348355029712756864, 0.471396736825997648556387626, // 40 |
| 0.290284677254462367636192376, 0.956940335732208864935797887, // 44 |
| }; |
| |
| const fpr fpr_tab_log6[] = { |
| 0.998795456205172392714771605, 0.049067674327418014254954977, // 64 |
| 0.671558954847018400625376850, 0.740951125354959091175616897, // 68 |
| 0.903989293123443331586200297, 0.427555093430282094320966857, // 72 |
| 0.336889853392220050689253213, 0.941544065183020778412509403, // 76 |
| 0.970031253194543992603984207, 0.242980179903263889948274162, // 80 |
| 0.514102744193221726593693839, 0.857728610000272069902269984, // 84 |
| 0.803207531480644909806676513, 0.595699304492433343467036529, // 88 |
| 0.146730474455361751658850130, 0.989176509964780973451673738, // 92 |
| }; |
| |
| const fpr fpr_tab_log7[] = { |
| 0.999698818696204220115765650, 0.024541228522912288031734529, // 128 |
| 0.689540544737066924616730630, 0.724247082951466920941069243, // 132 |
| 0.914209755703530654635014829, 0.405241314004989870908481306, // 136 |
| 0.359895036534988148775104572, 0.932992798834738887711660256, // 140 |
| 0.975702130038528544460395766, 0.219101240156869797227737547, // 144 |
| 0.534997619887097210663076905, 0.844853565249707073259571205, // 148 |
| 0.817584813151583696504920884, 0.575808191417845300745972454, // 152 |
| 0.170961888760301226363642357, 0.985277642388941244774018433, // 156 |
| 0.992479534598709998156767252, 0.122410675199216198498704474, // 160 |
| 0.615231590580626845484913563, 0.788346427626606262009164705, // 164 |
| 0.870086991108711418652292404, 0.492898192229784036873026689, // 168 |
| 0.266712757474898386325286515, 0.963776065795439866686464356, // 172 |
| 0.949528180593036667195936074, 0.313681740398891476656478846, // 176 |
| 0.449611329654606600046294579, 0.893224301195515320342416447, // 180 |
| 0.757208846506484547575464054, 0.653172842953776764084203014, // 184 |
| 0.073564563599667423529465622, 0.997290456678690216135597140, // 188 |
| }; |
| |
| const fpr fpr_tab_log8[] = { |
| 0.999924701839144540921646491, 0.012271538285719926079408262, // 256 |
| 0.698376249408972853554813503, 0.715730825283818654125532623, // 260 |
| 0.919113851690057743908477789, 0.393992040061048108596188661, // 264 |
| 0.371317193951837543411934967, 0.928506080473215565937167396, // 268 |
| 0.978317370719627633106240097, 0.207111376192218549708116020, // 272 |
| 0.545324988422046422313987347, 0.838224705554838043186996856, // 276 |
| 0.824589302785025264474803737, 0.565731810783613197389765011, // 280 |
| 0.183039887955140958516532578, 0.983105487431216327180301155, // 284 |
| 0.993906970002356041546922813, 0.110222207293883058807899140, // 288 |
| 0.624859488142386377084072816, 0.780737228572094478301588484, // 292 |
| 0.876070094195406607095844268, 0.482183772079122748517344481, // 296 |
| 0.278519689385053105207848526, 0.960430519415565811199035138, // 300 |
| 0.953306040354193836916740383, 0.302005949319228067003463232, // 304 |
| 0.460538710958240023633181487, 0.887639620402853947760181617, // 308 |
| 0.765167265622458925888815999, 0.643831542889791465068086063, // 312 |
| 0.085797312344439890461556332, 0.996312612182778012627226190, // 316 |
| 0.998118112900149207125155861, 0.061320736302208577782614593, // 320 |
| 0.662415777590171761113069817, 0.749136394523459325469203257, // 324 |
| 0.898674465693953843041976744, 0.438616238538527637647025738, // 328 |
| 0.325310292162262934135954708, 0.945607325380521325730945387, // 332 |
| 0.966976471044852109087220226, 0.254865659604514571553980779, // 336 |
| 0.503538383725717558691867071, 0.863972856121586737918147054, // 340 |
| 0.795836904608883536262791915, 0.605511041404325513920626941, // 344 |
| 0.134580708507126186316358409, 0.990902635427780025108237011, // 348 |
| 0.987301418157858382399815802, 0.158858143333861441684385360, // 352 |
| 0.585797857456438860328080838, 0.810457198252594791726703434, // 356 |
| 0.851355193105265142261290312, 0.524589682678468906215098464, // 360 |
| 0.231058108280671119643236018, 0.972939952205560145467720114, // 364 |
| 0.937339011912574923201899593, 0.348418680249434568419308588, // 368 |
| 0.416429560097637182562598911, 0.909167983090522376563884788, // 372 |
| 0.732654271672412834615546649, 0.680600997795453050594430464, // 376 |
| 0.036807222941358832324332691, 0.999322384588349500896221011, // 380 |
| }; |
| |
| const fpr fpr_tab_log9[] = { |
| 0.999981175282601142656990438, 0.006135884649154475359640235, // 512 |
| 0.702754744457225302452914421, 0.711432195745216441522130290, // 516 |
| 0.921514039342041943465396332, 0.388345046698826291624993541, // 520 |
| 0.377007410216418256726567823, 0.926210242138311341974793388, // 524 |
| 0.979569765685440534439326110, 0.201104634842091911558443546, // 528 |
| 0.550457972936604802977289893, 0.834862874986380056304401383, // 532 |
| 0.828045045257755752067527592, 0.560661576197336023839710223, // 536 |
| 0.189068664149806212754997837, 0.981963869109555264072848154, // 540 |
| 0.994564570734255452119106243, 0.104121633872054579120943880, // 544 |
| 0.629638238914927025372981341, 0.776888465673232450040827983, // 548 |
| 0.879012226428633477831323711, 0.476799230063322133342158117, // 552 |
| 0.284407537211271843618310615, 0.958703474895871555374645792, // 556 |
| 0.955141168305770721498157712, 0.296150888243623824121786128, // 560 |
| 0.465976495767966177902756065, 0.884797098430937780104007041, // 564 |
| 0.769103337645579639346626069, 0.639124444863775743801488193, // 568 |
| 0.091908956497132728624990979, 0.995767414467659793982495643, // 572 |
| 0.998475580573294752208559038, 0.055195244349689939809447526, // 576 |
| 0.666999922303637506650154222, 0.745057785441465962407907310, // 580 |
| 0.901348847046022014570746093, 0.433093818853151968484222638, // 584 |
| 0.331106305759876401737190737, 0.943593458161960361495301445, // 588 |
| 0.968522094274417316221088329, 0.248927605745720168110682816, // 592 |
| 0.508830142543107036931749324, 0.860866938637767279344583877, // 596 |
| 0.799537269107905033500246232, 0.600616479383868926653875896, // 600 |
| 0.140658239332849230714788846, 0.990058210262297105505906464, // 604 |
| 0.988257567730749491404792538, 0.152797185258443427720336613, // 608 |
| 0.590759701858874228423887908, 0.806847553543799272206514313, // 612 |
| 0.854557988365400520767862276, 0.519355990165589587361829932, // 616 |
| 0.237023605994367206867735915, 0.971503890986251775537099622, // 620 |
| 0.939459223602189911962669246, 0.342660717311994397592781983, // 624 |
| 0.422000270799799685941287941, 0.906595704514915365332960588, // 628 |
| 0.736816568877369875090132520, 0.676092703575315960360419228, // 632 |
| 0.042938256934940823077124540, 0.999077727752645382888781997, // 636 |
| 0.999529417501093163079703322, 0.030674803176636625934021028, // 640 |
| 0.685083667772700381362052545, 0.728464390448225196492035438, // 644 |
| 0.911706032005429851404397325, 0.410843171057903942183466675, // 648 |
| 0.354163525420490382357395796, 0.935183509938947577642207480, // 652 |
| 0.974339382785575860518721668, 0.225083911359792835991642120, // 656 |
| 0.529803624686294668216054671, 0.848120344803297251279133563, // 660 |
| 0.814036329705948361654516690, 0.580813958095764545075595272, // 664 |
| 0.164913120489969921418189113, 0.986308097244598647863297524, // 668 |
| 0.991709753669099522860049931, 0.128498110793793172624415589, // 672 |
| 0.610382806276309452716352152, 0.792106577300212351782342879, // 676 |
| 0.867046245515692651480195629, 0.498227666972781852410983869, // 680 |
| 0.260794117915275518280186509, 0.965394441697689374550843858, // 684 |
| 0.947585591017741134653387321, 0.319502030816015677901518272, // 688 |
| 0.444122144570429231642069418, 0.895966249756185155914560282, // 692 |
| 0.753186799043612482483430486, 0.657806693297078656931182264, // 696 |
| 0.067443919563664057897972422, 0.997723066644191609848546728, // 700 |
| 0.996820299291165714972629398, 0.079682437971430121147120656, // 704 |
| 0.648514401022112445084560551, 0.761202385484261814029709836, // 708 |
| 0.890448723244757889952150560, 0.455083587126343823535869268, // 712 |
| 0.307849640041534893682063646, 0.951435020969008369549175569, // 716 |
| 0.962121404269041595429604316, 0.272621355449948984493347477, // 720 |
| 0.487550160148435954641485027, 0.873094978418290098636085973, // 724 |
| 0.784556597155575233023892575, 0.620057211763289178646268191, // 728 |
| 0.116318630911904767252544319, 0.993211949234794533104601012, // 732 |
| 0.984210092386929073193874387, 0.177004220412148756196839844, // 736 |
| 0.570780745886967280232652864, 0.821102514991104679060430820, // 740 |
| 0.841554977436898409603499520, 0.540171472729892881297845480, // 744 |
| 0.213110319916091373967757518, 0.977028142657754351485866211, // 748 |
| 0.930766961078983731944872340, 0.365612997804773870011745909, // 752 |
| 0.399624199845646828544117031, 0.916679059921042663116457013, // 756 |
| 0.720002507961381629076682999, 0.693971460889654009003734389, // 760 |
| 0.018406729905804820927366313, 0.999830581795823422015722275, // 764 |
| }; |
| |
| const fpr *fpr_table[] = { |
| NULL, NULL, |
| fpr_tab_log2, |
| fpr_tab_log3, |
| fpr_tab_log4, |
| fpr_tab_log5, |
| fpr_tab_log6, |
| fpr_tab_log7, |
| fpr_tab_log8, |
| fpr_tab_log9, |
| }; |