kopia lustrzana https://github.com/projecthorus/horusdemodlib
220 wiersze
8.0 KiB
C
220 wiersze
8.0 KiB
C
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// phi0.c
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//
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// An approximation of the function
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//
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// This file is generated by the gen_phi0 script, from codec2
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// https://github.com/drowe67/codec2/blob/master/script/gen_phi0
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// Any changes should be made to that file, not this one
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#include <stdint.h>
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#define SI16(f) ((int32_t)(f * (1<<16)))
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float phi0( float xf ) {
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int32_t x = SI16(xf);
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if (x >= SI16(10.0f)) return(0.0f);
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else {
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if (x >= SI16(5.0f)) {
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int i = 19 - (x >> 15);
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switch (i) {
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case 0: return(0.000116589f); // (9.5)
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case 1: return(0.000192223f); // (9.0)
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case 2: return(0.000316923f); // (8.5)
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case 3: return(0.000522517f); // (8.0)
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case 4: return(0.000861485f); // (7.5)
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case 5: return(0.001420349f); // (7.0)
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case 6: return(0.002341760f); // (6.5)
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case 7: return(0.003860913f); // (6.0)
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case 8: return(0.006365583f); // (5.5)
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case 9: return(0.010495133f); // (5.0)
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}
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}
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else {
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if (x >= SI16(1.0f)) {
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int i = 79 - (x >> 12);
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switch (i) {
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case 0: return(0.013903889f); // (4.9375)
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case 1: return(0.014800644f); // (4.8750)
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case 2: return(0.015755242f); // (4.8125)
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case 3: return(0.016771414f); // (4.7500)
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case 4: return(0.017853133f); // (4.6875)
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case 5: return(0.019004629f); // (4.6250)
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case 6: return(0.020230403f); // (4.5625)
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case 7: return(0.021535250f); // (4.5000)
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case 8: return(0.022924272f); // (4.4375)
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case 9: return(0.024402903f); // (4.3750)
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case 10: return(0.025976926f); // (4.3125)
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case 11: return(0.027652501f); // (4.2500)
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case 12: return(0.029436184f); // (4.1875)
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case 13: return(0.031334956f); // (4.1250)
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case 14: return(0.033356250f); // (4.0625)
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case 15: return(0.035507982f); // (4.0000)
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case 16: return(0.037798579f); // (3.9375)
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case 17: return(0.040237016f); // (3.8750)
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case 18: return(0.042832850f); // (3.8125)
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case 19: return(0.045596260f); // (3.7500)
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case 20: return(0.048538086f); // (3.6875)
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case 21: return(0.051669874f); // (3.6250)
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case 22: return(0.055003924f); // (3.5625)
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case 23: return(0.058553339f); // (3.5000)
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case 24: return(0.062332076f); // (3.4375)
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case 25: return(0.066355011f); // (3.3750)
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case 26: return(0.070637993f); // (3.3125)
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case 27: return(0.075197917f); // (3.2500)
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case 28: return(0.080052790f); // (3.1875)
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case 29: return(0.085221814f); // (3.1250)
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case 30: return(0.090725463f); // (3.0625)
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case 31: return(0.096585578f); // (3.0000)
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case 32: return(0.102825462f); // (2.9375)
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case 33: return(0.109469985f); // (2.8750)
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case 34: return(0.116545700f); // (2.8125)
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case 35: return(0.124080967f); // (2.7500)
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case 36: return(0.132106091f); // (2.6875)
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case 37: return(0.140653466f); // (2.6250)
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case 38: return(0.149757747f); // (2.5625)
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case 39: return(0.159456024f); // (2.5000)
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case 40: return(0.169788027f); // (2.4375)
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case 41: return(0.180796343f); // (2.3750)
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case 42: return(0.192526667f); // (2.3125)
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case 43: return(0.205028078f); // (2.2500)
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case 44: return(0.218353351f); // (2.1875)
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case 45: return(0.232559308f); // (2.1250)
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case 46: return(0.247707218f); // (2.0625)
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case 47: return(0.263863255f); // (2.0000)
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case 48: return(0.281099022f); // (1.9375)
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case 49: return(0.299492155f); // (1.8750)
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case 50: return(0.319127030f); // (1.8125)
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case 51: return(0.340095582f); // (1.7500)
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case 52: return(0.362498271f); // (1.6875)
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case 53: return(0.386445235f); // (1.6250)
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case 54: return(0.412057648f); // (1.5625)
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case 55: return(0.439469363f); // (1.5000)
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case 56: return(0.468828902f); // (1.4375)
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case 57: return(0.500301872f); // (1.3750)
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case 58: return(0.534073947f); // (1.3125)
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case 59: return(0.570354566f); // (1.2500)
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case 60: return(0.609381573f); // (1.1875)
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case 61: return(0.651427083f); // (1.1250)
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case 62: return(0.696805010f); // (1.0625)
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case 63: return(0.745880827f); // (1.0000)
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}
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}
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else {
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if (x > SI16(0.007812f)) {
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if (x > SI16(0.088388f)) {
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if (x > SI16(0.250000f)) {
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if (x > SI16(0.500000f)) {
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if (x > SI16(0.707107f)) {
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return(0.922449644f);
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} else {
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return(1.241248638f);
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}
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} else {
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if (x > SI16(0.353553f)) {
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return(1.573515241f);
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} else {
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return(1.912825912f);
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}
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}
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} else {
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if (x > SI16(0.125000f)) {
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if (x > SI16(0.176777f)) {
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return(2.255740095f);
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} else {
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return(2.600476919f);
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}
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} else {
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return(2.946130351f);
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}
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}
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} else {
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if (x > SI16(0.022097f)) {
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if (x > SI16(0.044194f)) {
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if (x > SI16(0.062500f)) {
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return(3.292243417f);
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} else {
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return(3.638586634f);
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}
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} else {
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if (x > SI16(0.031250f)) {
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return(3.985045009f);
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} else {
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return(4.331560985f);
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}
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}
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} else {
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if (x > SI16(0.011049f)) {
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if (x > SI16(0.015625f)) {
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return(4.678105767f);
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} else {
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return(5.024664952f);
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}
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} else {
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return(5.371231340f);
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}
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}
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}
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} else {
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if (x > SI16(0.000691f)) {
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if (x > SI16(0.001953f)) {
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if (x > SI16(0.003906f)) {
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if (x > SI16(0.005524f)) {
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return(5.717801329f);
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} else {
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return(6.064373119f);
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}
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} else {
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if (x > SI16(0.002762f)) {
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return(6.410945809f);
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} else {
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return(6.757518949f);
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}
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}
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} else {
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if (x > SI16(0.000977f)) {
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if (x > SI16(0.001381f)) {
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return(7.104092314f);
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} else {
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return(7.450665792f);
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}
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} else {
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return(7.797239326f);
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}
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}
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} else {
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if (x > SI16(0.000173f)) {
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if (x > SI16(0.000345f)) {
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if (x > SI16(0.000488f)) {
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return(8.143812888f);
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} else {
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return(8.490386464f);
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}
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} else {
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if (x > SI16(0.000244f)) {
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return(8.836960047f);
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} else {
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return(9.183533634f);
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}
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}
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} else {
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if (x > SI16(0.000086f)) {
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if (x > SI16(0.000122f)) {
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return(9.530107222f);
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} else {
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return(9.876680812f);
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}
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} else {
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return(10.000000000f);
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}
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}
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}
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}
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}
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}
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}
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return(10.0f);
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}
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