Motorola DSP Developer's Kit

max-2r.asm

X = mot###_max(X, Y)

Description

This function returns a vector the same size as input vectors X and Y with the largest elements taken from vector X or Y,

Input/Output

Input: Vector X (real data), vector Y (real data)

Output: Vector X (largest element taken from X or Y)

Algorithm

#define IN1 x:$0
#define IN2 y:$0
#define OUT x:$0

MaxValue = X[0];
for(i=1; i<size; i++)
{
    if(X[i] < Y[i])
    {
        X[i] = Y[i];
    }
}

Memory & Register

X memory IN1 start address of location of input real vector X

Y memory IN2 start address of location of input real vector Y

X memory OUT start address of location of output real vector

Register R7 store number of items in the input array

Status Register

The assembly function max-2r.asm does not explicitly set any status registers/bits during the function execution.

Data Size Limit

The length of input vectors can't be larger than the continuous available data memory size.

Data Range Limit

Input data vector range [-1.0, +1.0]

Precision

In the case of DSP563, precision is 23 bits.

In the case of DSP566, precision is 15 bits.

Performance Limit

DSP563:

DSP566:

max-1c.asm

max-2c.asm