DSP_bitrev_cplx
4.8 Obsolete Functions
4.8.1FFT
DSP_bitrev_cplx | Complex | |||
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| NOTE: This function is provided for backward compatibility with the C62x | ||
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| DSPLIB. It has not been optimized for the C64x architecture. You are advised | ||
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| to use one of the newly added FFT functions which have been optimized for the | ||
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| C64x. |
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Function |
| void DSP_bitrev_cplx (int *x, short *index, int nx) | ||
Arguments |
| x[nx] | Pointer to complex input vector x of size nx | |
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| index[ ] | Array of size ∼sqrt(nx) created by the routine digitrev_index | |
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| (provided in the directory ‘support\fft’). | |
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| nx | Number of elements in vector x. nx must be a power of 2. | |
Description |
| This function | ||
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| function is used in conjunction with FFT routines to provide the correct format | ||
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| for the FFT input or output data. The | ||
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| yields a | ||
Algorithm |
| TI retains all rights, title and interest in this code and only authorizes the use | ||
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| of this code on TI TMS320 DSPs manufactured by TI. This is the C equivalent | ||
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| of the assembly code without restrictions. Note that the assembly code is hand | ||
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| optimized and restrictions may apply. | ||
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| void DSP_bitrev_cplx (int *x, short *index, int nx) | ||
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| int | i; | |
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| short | i0, i1, i2, i3; | |
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| short | j0, j1, j2, j3; | |
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| int | xi0, xi1, xi2, xi3; | |
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| int | xj0, xj1, xj2, xj3; | |
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| short | t; | |
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| int | a, b, ia, ib, ibs; | |
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| int | mask; | |
