Texas Instruments TMS320C64X manual DSPblkmove, Block Move Overlapping

DSP_blk_move

DSP_blk_move	Block Move (Overlapping)
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

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