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DSP_blk_move
4-84
Block Move (Overlapping)
DSP_blk_move
Function void DSP_blk_move(short * x, short * r, int nx)
Arguments x [nx] Block of data to be moved.
r [nx] Destination of block of data.
nx Number of elements in block. Must be multiple of 8 and ≥32.
Description This routine moves nx 16-bit elements from one memory location pointed to
by x to another pointed to by r. The source and destination blocks can be
overlapped.
Algorithm This is the C equivalent of the assembly code without restrictions. Note that
the assembly code is hand optimized and restrictions may apply.
void DSP_blk_move(short *x, short *r, int nx)
{
int i;
if( r < x )
{
for (I = 0; I < nx; i++)
r[i] = x[i];
} else
{
for (I = nx−1; I >= 0; i−−)
r[i] = x[i];
}
}
Special Requirements nx must be a multiple of 8 and ≥ 32.
Implementation Notes
- Twin input and output pointers are used.
- Bank Conflicts: No bank conflicts occur.
- Interruptibility: The code is fully interruptible.
Benchmarks Cycles nx/4+18
Codesize 112 bytes