Texas Instruments C28 Series - Multiplication of a Real Vector and a Real Vector

Function Descriptions
3.33 Multiplication of a Real Vector and a Real Vector
Description:
This module multiplies two real vectors.
Y [i] = W [i] ∗ X[i]
Header File:
FPU.h
Declaration:
void mpy_SP_RVxRV_2(float32
*
y, const float32
*
w,
const float32
*
x, const Uint16 N)
Usage:
mpy_SP_RVxRV_2(y, w, x, N);
float32 *y
result real array
float32 *w
input real array 1
float32 *x
input real array 2
Uint16 N
length of w, x and y arrays
The type “complex_float” is defined as
typedef struct{
float32 dat[2];
}complex_float;
Element dat[0] is the real part, dat[1] is the imaginary part.
Alignment Requirements:
None
Notes:
1. N must be EVEN and a minimum of 4.
Example:
#include "FPU.h"
#define N 4
float32 w[N], x[N], y[N];
float32 c;
main()
{
mpy_SP_RVxRV_2(y, w, x, N);
}
Benchmark Information:
Number of Cycles = 3*N + 17 cycles (including the call and return)
Sep 10, 2012 67