Motorola DSP Developer's Kit

sort-r2.asm

[Y, I] = mot###_sort(X)

Description

This function sorts real elements of input real vector X

Input/Output

Input: Vector X

Output: Result vector Y, and index vector I

Algorithm

#define IN X:$0
#define OUT X:$0
#define INDEX Y:$0

The algorithm is the same as sort-r1, the only difference between these two functions is that sort-r2 has one more output-index vector I.

Memory & Register

Memory allocation:

X memory:

• Label IN stores the address of the real input of vector X
• Label OUT stores the address of the real output of vector Y

(Same as Label IN)

• Label INDEX stores the address of the index vector

Register usage:

• R7 store number of items in the array

Status Register

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

Data Size Limit

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

Data Range Limit

The value of input vector X must be between -1.0 and +1.0.

Precision

In the case of DSP563, precision is 23 bits.

In the case of DSP566, precision is 15 bits.

sort-r1.asm

sort-c.asm