1 | MODULE poly_m |
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2 | |
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3 | IMPLICIT NONE |
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4 | |
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5 | INTEGER, PARAMETER, private :: NPAR_POLY=8 |
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6 | |
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7 | INTERFACE poly |
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8 | MODULE PROCEDURE poly_rr,poly_rrv,poly_dd,poly_ddv,& |
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9 | poly_rc,poly_cc,poly_msk_rrv,poly_msk_ddv |
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10 | END INTERFACE |
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11 | |
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12 | private poly_rr,poly_rrv,poly_dd,poly_ddv,& |
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13 | poly_rc,poly_cc,poly_msk_rrv,poly_msk_ddv |
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14 | |
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15 | CONTAINS |
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16 | |
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17 | FUNCTION poly_rr(x,coeffs) |
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18 | REAL, INTENT(IN) :: x |
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19 | REAL, DIMENSION(:), INTENT(IN) :: coeffs |
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20 | REAL :: poly_rr |
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21 | REAL :: pow |
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22 | REAL, DIMENSION(:), ALLOCATABLE :: vec |
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23 | INTEGER :: i,n,nn |
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24 | n=size(coeffs) |
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25 | if (n <= 0) then |
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26 | poly_rr=0.0 |
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27 | else if (n < NPAR_POLY) then |
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28 | poly_rr=coeffs(n) |
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29 | do i=n-1,1,-1 |
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30 | poly_rr=x*poly_rr+coeffs(i) |
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31 | end do |
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32 | else |
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33 | allocate(vec(n+1)) |
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34 | pow=x |
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35 | vec(1:n)=coeffs |
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36 | do |
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37 | vec(n+1)=0.0 |
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38 | nn=ishft(n+1,-1) |
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39 | vec(1:nn)=vec(1:n:2)+pow*vec(2:n+1:2) |
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40 | if (nn == 1) exit |
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41 | pow=pow*pow |
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42 | n=nn |
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43 | end do |
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44 | poly_rr=vec(1) |
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45 | deallocate(vec) |
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46 | end if |
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47 | END FUNCTION poly_rr |
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48 | !BL |
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49 | FUNCTION poly_dd(x,coeffs) |
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50 | DOUBLE PRECISION, INTENT(IN) :: x |
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51 | DOUBLE PRECISION, DIMENSION(:), INTENT(IN) :: coeffs |
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52 | DOUBLE PRECISION :: poly_dd |
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53 | DOUBLE PRECISION :: pow |
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54 | DOUBLE PRECISION, DIMENSION(:), ALLOCATABLE :: vec |
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55 | INTEGER :: i,n,nn |
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56 | n=size(coeffs) |
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57 | if (n <= 0) then |
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58 | poly_dd=0.0d0 |
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59 | else if (n < NPAR_POLY) then |
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60 | poly_dd=coeffs(n) |
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61 | do i=n-1,1,-1 |
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62 | poly_dd=x*poly_dd+coeffs(i) |
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63 | end do |
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64 | else |
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65 | allocate(vec(n+1)) |
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66 | pow=x |
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67 | vec(1:n)=coeffs |
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68 | do |
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69 | vec(n+1)=0.0d0 |
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70 | nn=ishft(n+1,-1) |
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71 | vec(1:nn)=vec(1:n:2)+pow*vec(2:n+1:2) |
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72 | if (nn == 1) exit |
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73 | pow=pow*pow |
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74 | n=nn |
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75 | end do |
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76 | poly_dd=vec(1) |
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77 | deallocate(vec) |
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78 | end if |
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79 | END FUNCTION poly_dd |
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80 | !BL |
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81 | FUNCTION poly_rc(x,coeffs) |
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82 | COMPLEX, INTENT(IN) :: x |
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83 | REAL, DIMENSION(:), INTENT(IN) :: coeffs |
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84 | COMPLEX :: poly_rc |
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85 | COMPLEX :: pow |
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86 | COMPLEX, DIMENSION(:), ALLOCATABLE :: vec |
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87 | INTEGER :: i,n,nn |
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88 | n=size(coeffs) |
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89 | if (n <= 0) then |
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90 | poly_rc=0.0 |
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91 | else if (n < NPAR_POLY) then |
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92 | poly_rc=coeffs(n) |
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93 | do i=n-1,1,-1 |
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94 | poly_rc=x*poly_rc+coeffs(i) |
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95 | end do |
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96 | else |
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97 | allocate(vec(n+1)) |
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98 | pow=x |
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99 | vec(1:n)=coeffs |
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100 | do |
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101 | vec(n+1)=0.0 |
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102 | nn=ishft(n+1,-1) |
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103 | vec(1:nn)=vec(1:n:2)+pow*vec(2:n+1:2) |
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104 | if (nn == 1) exit |
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105 | pow=pow*pow |
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106 | n=nn |
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107 | end do |
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108 | poly_rc=vec(1) |
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109 | deallocate(vec) |
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110 | end if |
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111 | END FUNCTION poly_rc |
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112 | !BL |
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113 | FUNCTION poly_cc(x,coeffs) |
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114 | COMPLEX, INTENT(IN) :: x |
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115 | COMPLEX, DIMENSION(:), INTENT(IN) :: coeffs |
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116 | COMPLEX :: poly_cc |
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117 | COMPLEX :: pow |
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118 | COMPLEX, DIMENSION(:), ALLOCATABLE :: vec |
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119 | INTEGER :: i,n,nn |
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120 | n=size(coeffs) |
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121 | if (n <= 0) then |
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122 | poly_cc=0.0 |
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123 | else if (n < NPAR_POLY) then |
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124 | poly_cc=coeffs(n) |
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125 | do i=n-1,1,-1 |
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126 | poly_cc=x*poly_cc+coeffs(i) |
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127 | end do |
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128 | else |
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129 | allocate(vec(n+1)) |
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130 | pow=x |
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131 | vec(1:n)=coeffs |
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132 | do |
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133 | vec(n+1)=0.0 |
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134 | nn=ishft(n+1,-1) |
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135 | vec(1:nn)=vec(1:n:2)+pow*vec(2:n+1:2) |
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136 | if (nn == 1) exit |
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137 | pow=pow*pow |
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138 | n=nn |
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139 | end do |
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140 | poly_cc=vec(1) |
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141 | deallocate(vec) |
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142 | end if |
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143 | END FUNCTION poly_cc |
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144 | !BL |
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145 | FUNCTION poly_rrv(x,coeffs) |
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146 | REAL, DIMENSION(:), INTENT(IN) :: coeffs,x |
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147 | REAL, DIMENSION(size(x)) :: poly_rrv |
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148 | INTEGER :: i,n,m |
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149 | m=size(coeffs) |
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150 | n=size(x) |
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151 | if (m <= 0) then |
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152 | poly_rrv=0.0 |
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153 | else if (m < n .or. m < NPAR_POLY) then |
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154 | poly_rrv=coeffs(m) |
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155 | do i=m-1,1,-1 |
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156 | poly_rrv=x*poly_rrv+coeffs(i) |
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157 | end do |
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158 | else |
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159 | do i=1,n |
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160 | poly_rrv(i)=poly_rr(x(i),coeffs) |
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161 | end do |
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162 | end if |
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163 | END FUNCTION poly_rrv |
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164 | !BL |
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165 | FUNCTION poly_ddv(x,coeffs) |
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166 | DOUBLE PRECISION, DIMENSION(:), INTENT(IN) :: coeffs,x |
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167 | DOUBLE PRECISION, DIMENSION(size(x)) :: poly_ddv |
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168 | INTEGER :: i,n,m |
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169 | m=size(coeffs) |
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170 | n=size(x) |
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171 | if (m <= 0) then |
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172 | poly_ddv=0.0d0 |
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173 | else if (m < n .or. m < NPAR_POLY) then |
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174 | poly_ddv=coeffs(m) |
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175 | do i=m-1,1,-1 |
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176 | poly_ddv=x*poly_ddv+coeffs(i) |
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177 | end do |
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178 | else |
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179 | do i=1,n |
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180 | poly_ddv(i)=poly_dd(x(i),coeffs) |
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181 | end do |
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182 | end if |
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183 | END FUNCTION poly_ddv |
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184 | !BL |
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185 | FUNCTION poly_msk_rrv(x,coeffs,mask) |
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186 | REAL, DIMENSION(:), INTENT(IN) :: coeffs,x |
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187 | LOGICAL, DIMENSION(:), INTENT(IN) :: mask |
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188 | REAL, DIMENSION(size(x)) :: poly_msk_rrv |
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189 | poly_msk_rrv=unpack(poly_rrv(pack(x,mask),coeffs),mask,0.0) |
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190 | END FUNCTION poly_msk_rrv |
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191 | !BL |
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192 | FUNCTION poly_msk_ddv(x,coeffs,mask) |
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193 | DOUBLE PRECISION, DIMENSION(:), INTENT(IN) :: coeffs,x |
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194 | LOGICAL, DIMENSION(:), INTENT(IN) :: mask |
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195 | DOUBLE PRECISION, DIMENSION(size(x)) :: poly_msk_ddv |
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196 | poly_msk_ddv=unpack(poly_ddv(pack(x,mask),coeffs),mask,0.0d0) |
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197 | END FUNCTION poly_msk_ddv |
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198 | |
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199 | END MODULE poly_m |
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