Texas Instruments TMS320C64X manual Q15 to Float Conversion, DSPq15tofl

			DSP_q15tofl
	Q15 to Float Conversion
DSP_q15tofl
Function		void DSP_q15tofl (short *x, float *r, int nx)
Arguments		x[nx]	Pointer to Q.15 input vector of size nx.
		r[nx]	Pointer to floating-point output data vector of size nx containing
			the floating-point equivalent of vector x.
		nx	Length of input and output data vectors. Must be multiple of 2.
Description		Converts the values stored in vector x[ ] in Q.15 format to IEEE floating point
		numbers in output vector r[ ].
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_q15tofl(short *x, float *r, int nx)

{

int i;

for (i=0;i<nx;i++)

r[i] = (float) x[i] / 0x8000;

}

Special Requirements nx must be a multiple of 2.

Implementation Notes

	- Bank Conflicts: No bank conflicts occur.
	- Interruptibility: The code is interrupt-tolerant but not interruptible.
	- Loop is unrolled twice
Benchmarks	Cycles	2 * nx + 14
	Codesize	184 bytes

C64x+ DSPLIB Reference 4-89