| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S Y S T E M . A R I T H _ 3 2 -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 2020-2021, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This unit provides software routines for doing arithmetic on 32-bit |
| -- signed integer values in cases where either overflow checking is |
| -- required, or intermediate results are longer than 32 bits. |
| |
| with Interfaces; |
| |
| package System.Arith_32 is |
| pragma Pure; |
| |
| subtype Int32 is Interfaces.Integer_32; |
| |
| procedure Scaled_Divide32 |
| (X, Y, Z : Int32; |
| Q, R : out Int32; |
| Round : Boolean); |
| -- Performs the division of (X * Y) / Z, storing the quotient in Q |
| -- and the remainder in R. Constraint_Error is raised if Z is zero, |
| -- or if the quotient does not fit in 32 bits. Round indicates if |
| -- the result should be rounded. If Round is False, then Q, R are |
| -- the normal quotient and remainder from a truncating division. |
| -- If Round is True, then Q is the rounded quotient. The remainder |
| -- R is not affected by the setting of the Round flag. |
| |
| end System.Arith_32; |
