longsub()

Description

This function is used to subtract 64-bit numbers.

Mathematical function which subtracts val with val2 (val-val2=res).

Syntax

longsub(valL, valH, val2L, val2H, resL, resH);

Parameters

Variable	Input

Variable	Input
`valL`	variable which holds least significant 32 bits of number you want to subtract with val2.
`valH`	variable which holds most significant 32 bits of number you want to subtract with val2.
`val2L`	variable which holds least significant 32 bits of number you want to subtract with val.
`val2H`	variable which holds most significant 32 bits of number you want to subtract with val.
`rezL`	variable which will hold most significant 32 bits of subtraction result between val and val2.
`rezH`	variable which will hold least significant 32 bits of subtraction result between val and val2.

Returns

Always returns SCRIPT_OPERATION_SUCCESS.

Function call example

Example of 64 bit subtraction

new Number1MSB = 100;
new Number1LSB = 20;
new Number2MSB = 25;
new Number2LSB = 5;
new ResultMSB  = 0;
new ResultLSB  = 0;
 
main()
{ 
    longsub(Number1LSB, Number1MSB, Number2LSB, Number2MSB, ResultLSB, ResultMSB); // ResultMSB = 75 and ResultLSB = 15
 
    for(;;)
	{
		Delay(1000);
    }
}