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annotate libtwamr/az_lsp.c @ 553:ebcf414b7d99

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doc/TFO-transform: describe details for FRv1, both modes
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 07 Oct 2024 08:24:24 +0000
parents 07f936338de1
children
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : az_lsp.c
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11 * Purpose : Compute the LSPs from the LP coefficients
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12 *
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13 ********************************************************************************
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14 */
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15 /*
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16 ********************************************************************************
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17 * MODULE INCLUDE FILE AND VERSION ID
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18 ********************************************************************************
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19 */
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20 #include "namespace.h"
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21 #include "az_lsp.h"
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22 /*
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23 ********************************************************************************
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24 * INCLUDE FILES
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25 ********************************************************************************
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26 */
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27 #include "typedef.h"
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28 #include "basic_op.h"
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29 #include "oper_32b.h"
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30 #include "no_count.h"
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31 #include "cnst.h"
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32
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33 /*
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34 ********************************************************************************
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35 * LOCAL VARIABLES AND TABLES
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36 ********************************************************************************
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37 */
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38 #include "grid.tab"
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39 #define NC M/2 /* M = LPC order, NC = M/2 */
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40
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41 /*
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42 ********************************************************************************
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43 * LOCAL PROGRAM CODE
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44 ********************************************************************************
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45 */
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46 /*
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47 **************************************************************************
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48 *
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49 * Function : Chebps
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50 * Purpose : Evaluates the Chebyshev polynomial series
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51 * Description : - The polynomial order is n = m/2 = 5
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52 * - The polynomial F(z) (F1(z) or F2(z)) is given by
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53 * F(w) = 2 exp(-j5w) C(x)
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54 * where
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55 * C(x) = T_n(x) + f(1)T_n-1(x) + ... +f(n-1)T_1(x) + f(n)/2
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56 * and T_m(x) = cos(mw) is the mth order Chebyshev
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57 * polynomial ( x=cos(w) )
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58 * Returns : C(x) for the input x.
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59 *
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60 **************************************************************************
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61 */
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62 static Word16 Chebps (Word16 x,
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63 Word16 f[], /* (n) */
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64 Word16 n)
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65 {
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66 Word16 i, cheb;
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67 Word16 b0_h, b0_l, b1_h, b1_l, b2_h, b2_l;
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68 Word32 t0;
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69
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70 b2_h = 256; move16 (); /* b2 = 1.0 */
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71 b2_l = 0; move16 ();
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72
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73 t0 = L_mult (x, 512); /* 2*x */
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74 t0 = L_mac (t0, f[1], 8192); /* + f[1] */
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75 L_Extract (t0, &b1_h, &b1_l); /* b1 = 2*x + f[1] */
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76
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77 for (i = 2; i < n; i++)
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78 {
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79 t0 = Mpy_32_16 (b1_h, b1_l, x); /* t0 = 2.0*x*b1 */
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80 t0 = L_shl (t0, 1);
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81 t0 = L_mac (t0, b2_h, (Word16) 0x8000); /* t0 = 2.0*x*b1 - b2 */
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82 t0 = L_msu (t0, b2_l, 1);
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83 t0 = L_mac (t0, f[i], 8192); /* t0 = 2.0*x*b1 - b2 + f[i] */
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84
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85 L_Extract (t0, &b0_h, &b0_l); /* b0 = 2.0*x*b1 - b2 + f[i]*/
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86
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87 b2_l = b1_l; move16 (); /* b2 = b1; */
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88 b2_h = b1_h; move16 ();
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89 b1_l = b0_l; move16 (); /* b1 = b0; */
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90 b1_h = b0_h; move16 ();
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91 }
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92
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93 t0 = Mpy_32_16 (b1_h, b1_l, x); /* t0 = x*b1; */
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94 t0 = L_mac (t0, b2_h, (Word16) 0x8000); /* t0 = x*b1 - b2 */
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95 t0 = L_msu (t0, b2_l, 1);
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96 t0 = L_mac (t0, f[i], 4096); /* t0 = x*b1 - b2 + f[i]/2 */
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97
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98 t0 = L_shl (t0, 6);
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99
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100 cheb = extract_h (t0);
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101
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102 return (cheb);
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103 }
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104
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105 /*
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106 ********************************************************************************
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107 * PUBLIC PROGRAM CODE
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108 ********************************************************************************
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109 */
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110 /*
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111 **************************************************************************
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112 *
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113 * Function : Az_lsp
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114 * Purpose : Compute the LSPs from the LP coefficients
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115 *
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116 **************************************************************************
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117 */
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118 void Az_lsp (
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119 Word16 a[], /* (i) : predictor coefficients (MP1) */
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120 Word16 lsp[], /* (o) : line spectral pairs (M) */
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121 Word16 old_lsp[] /* (i) : old lsp[] (in case not found 10 roots) (M) */
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122 )
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123 {
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124 Word16 i, j, nf, ip;
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125 Word16 xlow, ylow, xhigh, yhigh, xmid, ymid, xint;
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126 Word16 x, y, sign, exp;
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127 Word16 *coef;
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128 Word16 f1[M / 2 + 1], f2[M / 2 + 1];
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129 Word32 t0;
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130
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131 /*-------------------------------------------------------------*
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132 * find the sum and diff. pol. F1(z) and F2(z) *
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133 * F1(z) <--- F1(z)/(1+z**-1) & F2(z) <--- F2(z)/(1-z**-1) *
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134 * *
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135 * f1[0] = 1.0; *
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136 * f2[0] = 1.0; *
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137 * *
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parents:
diff changeset
138 * for (i = 0; i< NC; i++) *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 * { *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 * f1[i+1] = a[i+1] + a[M-i] - f1[i] ; *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 * f2[i+1] = a[i+1] - a[M-i] + f2[i] ; *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 * } *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 *-------------------------------------------------------------*/
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 f1[0] = 1024; move16 (); /* f1[0] = 1.0 */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 f2[0] = 1024; move16 (); /* f2[0] = 1.0 */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 for (i = 0; i < NC; i++)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 t0 = L_mult (a[i + 1], 8192); /* x = (a[i+1] + a[M-i]) >> 2 */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 t0 = L_mac (t0, a[M - i], 8192);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 x = extract_h (t0);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 /* f1[i+1] = a[i+1] + a[M-i] - f1[i] */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 f1[i + 1] = sub (x, f1[i]);move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 t0 = L_mult (a[i + 1], 8192); /* x = (a[i+1] - a[M-i]) >> 2 */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 t0 = L_msu (t0, a[M - i], 8192);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 x = extract_h (t0);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 /* f2[i+1] = a[i+1] - a[M-i] + f2[i] */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 f2[i + 1] = add (x, f2[i]);move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 /*-------------------------------------------------------------*
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 * find the LSPs using the Chebychev pol. evaluation *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 *-------------------------------------------------------------*/
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 nf = 0; move16 (); /* number of found frequencies */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 ip = 0; move16 (); /* indicator for f1 or f2 */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 coef = f1; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 xlow = grid[0]; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 ylow = Chebps (xlow, coef, NC);move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 j = 0;
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 test (); test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 /* while ( (nf < M) && (j < grid_points) ) */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 while ((sub (nf, M) < 0) && (sub (j, grid_points) < 0))
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 j++;
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 xhigh = xlow; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 yhigh = ylow; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 xlow = grid[j]; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 ylow = Chebps (xlow, coef, NC);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 if (L_mult (ylow, yhigh) <= (Word32) 0L)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 /* divide 4 times the interval */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 for (i = 0; i < 4; i++)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 /* xmid = (xlow + xhigh)/2 */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 xmid = add (shr (xlow, 1), shr (xhigh, 1));
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 ymid = Chebps (xmid, coef, NC);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 if (L_mult (ylow, ymid) <= (Word32) 0L)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 yhigh = ymid; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 xhigh = xmid; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 else
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 ylow = ymid; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 xlow = xmid; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 /*-------------------------------------------------------------*
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 * Linear interpolation *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 * xint = xlow - ylow*(xhigh-xlow)/(yhigh-ylow); *
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 *-------------------------------------------------------------*/
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 x = sub (xhigh, xlow);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 y = sub (yhigh, ylow);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 if (y == 0)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 xint = xlow; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 else
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 sign = y; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 y = abs_s (y);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 exp = norm_s (y);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 y = shl (y, exp);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 y = div_s ((Word16) 16383, y);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 t0 = L_mult (x, y);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 t0 = L_shr (t0, sub (20, exp));
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 y = extract_l (t0); /* y= (xhigh-xlow)/(yhigh-ylow) */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 if (sign < 0)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 y = negate (y);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 t0 = L_mult (ylow, y);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 t0 = L_shr (t0, 11);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 xint = sub (xlow, extract_l (t0)); /* xint = xlow - ylow*y */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 lsp[nf] = xint; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 xlow = xint; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 nf++;
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 if (ip == 0)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 ip = 1; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 coef = f2; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 else
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 ip = 0; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 coef = f1; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 ylow = Chebps (xlow, coef, NC);
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 test (); test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 /* Check if M roots found */
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 test ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 if (sub (nf, M) < 0)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 for (i = 0; i < M; i++)
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 {
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 lsp[i] = old_lsp[i]; move16 ();
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 return;
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 }
54f6bc41ed10 libtwamr: integrate a* modules
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281