84   double step[16];  in butterfly_16x16_dct_1d()  local
89   step[ 0] = input[0] + input[15];  in butterfly_16x16_dct_1d()
90   step[ 1] = input[1] + input[14];  in butterfly_16x16_dct_1d()
91   step[ 2] = input[2] + input[13];  in butterfly_16x16_dct_1d()
92   step[ 3] = input[3] + input[12];  in butterfly_16x16_dct_1d()
93   step[ 4] = input[4] + input[11];  in butterfly_16x16_dct_1d()
94   step[ 5] = input[5] + input[10];  in butterfly_16x16_dct_1d()
95   step[ 6] = input[6] + input[ 9];  in butterfly_16x16_dct_1d()
96   step[ 7] = input[7] + input[ 8];  in butterfly_16x16_dct_1d()
97   step[ 8] = input[7] - input[ 8];  in butterfly_16x16_dct_1d()
98   step[ 9] = input[6] - input[ 9];  in butterfly_16x16_dct_1d()
99   step[10] = input[5] - input[10];  in butterfly_16x16_dct_1d()
100   step[11] = input[4] - input[11];  in butterfly_16x16_dct_1d()
101   step[12] = input[3] - input[12];  in butterfly_16x16_dct_1d()
102   step[13] = input[2] - input[13];  in butterfly_16x16_dct_1d()
103   step[14] = input[1] - input[14];  in butterfly_16x16_dct_1d()
104   step[15] = input[0] - input[15];  in butterfly_16x16_dct_1d()
107   output[0] = step[0] + step[7];  in butterfly_16x16_dct_1d()
108   output[1] = step[1] + step[6];  in butterfly_16x16_dct_1d()
109   output[2] = step[2] + step[5];  in butterfly_16x16_dct_1d()
110   output[3] = step[3] + step[4];  in butterfly_16x16_dct_1d()
111   output[4] = step[3] - step[4];  in butterfly_16x16_dct_1d()
112   output[5] = step[2] - step[5];  in butterfly_16x16_dct_1d()
113   output[6] = step[1] - step[6];  in butterfly_16x16_dct_1d()
114   output[7] = step[0] - step[7];  in butterfly_16x16_dct_1d()
116   temp1 = step[ 8] * C7;  in butterfly_16x16_dct_1d()
117   temp2 = step[15] * C9;  in butterfly_16x16_dct_1d()
120   temp1 = step[ 9] * C11;  in butterfly_16x16_dct_1d()
121   temp2 = step[14] * C5;  in butterfly_16x16_dct_1d()
124   temp1 = step[10] * C3;  in butterfly_16x16_dct_1d()
125   temp2 = step[13] * C13;  in butterfly_16x16_dct_1d()
128   temp1 = step[11] * C15;  in butterfly_16x16_dct_1d()
129   temp2 = step[12] * C1;  in butterfly_16x16_dct_1d()
132   temp1 = step[11] * C1;  in butterfly_16x16_dct_1d()
133   temp2 = step[12] * C15;  in butterfly_16x16_dct_1d()
136   temp1 = step[10] * C13;  in butterfly_16x16_dct_1d()
137   temp2 = step[13] * C3;  in butterfly_16x16_dct_1d()
140   temp1 = step[ 9] * C5;  in butterfly_16x16_dct_1d()
141   temp2 = step[14] * C11;  in butterfly_16x16_dct_1d()
144   temp1 = step[ 8] * C9;  in butterfly_16x16_dct_1d()
145   temp2 = step[15] * C7;  in butterfly_16x16_dct_1d()
149   step[ 0] = output[0] + output[3];  in butterfly_16x16_dct_1d()
150   step[ 1] = output[1] + output[2];  in butterfly_16x16_dct_1d()
151   step[ 2] = output[1] - output[2];  in butterfly_16x16_dct_1d()
152   step[ 3] = output[0] - output[3];  in butterfly_16x16_dct_1d()
156   step[ 4] = temp1 + temp2;  in butterfly_16x16_dct_1d()
160   step[ 5] = temp1 + temp2;  in butterfly_16x16_dct_1d()
164   step[ 6] = temp2 - temp1;  in butterfly_16x16_dct_1d()
168   step[ 7] = temp2 - temp1;  in butterfly_16x16_dct_1d()
170   step[ 8] = output[ 8] + output[11];  in butterfly_16x16_dct_1d()
171   step[ 9] = output[ 9] + output[10];  in butterfly_16x16_dct_1d()
172   step[10] = output[ 9] - output[10];  in butterfly_16x16_dct_1d()
173   step[11] = output[ 8] - output[11];  in butterfly_16x16_dct_1d()
175   step[12] = output[12] + output[15];  in butterfly_16x16_dct_1d()
176   step[13] = output[13] + output[14];  in butterfly_16x16_dct_1d()
177   step[14] = output[13] - output[14];  in butterfly_16x16_dct_1d()
178   step[15] = output[12] - output[15];  in butterfly_16x16_dct_1d()
181   output[ 0] = (step[ 0] + step[ 1]);  in butterfly_16x16_dct_1d()
182   output[ 8] = (step[ 0] - step[ 1]);  in butterfly_16x16_dct_1d()
184   temp1 = step[2] * C12;  in butterfly_16x16_dct_1d()
185   temp2 = step[3] * C4;  in butterfly_16x16_dct_1d()
189   temp1 = step[2] * C4;  in butterfly_16x16_dct_1d()
190   temp2 = step[3] * C12;  in butterfly_16x16_dct_1d()
194   output[ 2] = 2 * ((step[4] + step[ 5]) * C8);  in butterfly_16x16_dct_1d()
195   output[14] = 2 * ((step[7] - step[ 6]) * C8);  in butterfly_16x16_dct_1d()
197   temp1 = step[4] - step[5];  in butterfly_16x16_dct_1d()
198   temp2 = step[6] + step[7];  in butterfly_16x16_dct_1d()
202   intermediate[8] = step[8] + step[14];  in butterfly_16x16_dct_1d()
203   intermediate[9] = step[9] + step[15];  in butterfly_16x16_dct_1d()
215   output[ 9] = 2 * ((step[10] + step[11]) * C8);  in butterfly_16x16_dct_1d()
217   intermediate[11] = step[10] - step[11];  in butterfly_16x16_dct_1d()
218   intermediate[12] = step[12] + step[13];  in butterfly_16x16_dct_1d()
219   intermediate[13] = step[12] - step[13];  in butterfly_16x16_dct_1d()
220   intermediate[14] = step[ 8] - step[14];  in butterfly_16x16_dct_1d()
221   intermediate[15] = step[ 9] - step[15];  in butterfly_16x16_dct_1d()