DSP_fft16x16r
k = (k0 << 6) | k1; |
| ||
if (l0 | < 0) |
|
| |
| k = k << −l0; |
|
| |
else |
|
|
| |
| k = k >> l0; |
|
| |
j++; | /* multiple of 4 index */ | |||
x0 | = | ptr_x0[0]; | x1 | = ptr_x0[1]; |
x2 | = | ptr_x0[2]; | x3 | = ptr_x0[3]; |
x4 | = | ptr_x0[4]; | x5 | = ptr_x0[5]; |
x6 | = | ptr_x0[6]; | x7 | = ptr_x0[7]; |
ptr_x0 | += 8; |
|
| |
xh0_0 = x0 + x4; xh1_0 = x1 + x5; xh0_1 = x2 + x6; xh1_1 = x3 + x7; if (radix == 2)
{
xh0_0 = x0; xh1_0 = x1; xh0_1 = x2; xh1_1 = x3;
}
yt0 = xh0_0 + xh0_1; yt1 = xh1_0 + xh1_1; yt4 = xh0_0 − xh0_1; yt5 = xh1_0 − xh1_1; xl0_0 = x0 − x4; xl1_0 = x1 − x5; xl0_1 = x2 − x6; xl1_1 = x3 − x7;
if (radix == 2)
{
xl0_0 = x4; xl1_0 = x5;
C64x+ DSPLIB Reference |
