# Sub64

Subtracts a 64-bit integer from another.

### Synopsis

`void Sub64( int64 *r, int64 *s1, int64 *s2 )`

### Description

This function subtracts one 64-bit integer from another and deposits the 64-bit result in the location pointed to by r.

### Arguments

r
  A pointer to the 64-bit result of the subtraction.

s1, s2
  Pointers to the two 64-bit numbers for the subtraction. s2 is subtracted from s1.

### Implementation

Folio call implemented in operamath V20.

### Associated Files

operamath.h, operamath.lib

### See Also

``SubF32`(), SubF60(), SubF16(), SubF30(), SubF14(), Sub32()`