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Diffstat (limited to 'gcc/ada/s-casi16.ads')
| -rw-r--r-- | gcc/ada/s-casi16.ads | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/gcc/ada/s-casi16.ads b/gcc/ada/s-casi16.ads new file mode 100644 index 00000000000..234b360fae3 --- /dev/null +++ b/gcc/ada/s-casi16.ads @@ -0,0 +1,56 @@ +------------------------------------------------------------------------------ +-- -- +-- GNU ADA RUNTIME LIBRARY COMPONENTS -- +-- -- +-- S Y S T E M . C O M P A R E _ A R R A Y _ S I G N E D _ 1 6 -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2002 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 2, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains functions for runtime comparisons on arrays whose +-- elements are 16-bit discrete type values to be treated as signed. + +package System.Compare_Array_Signed_16 is + + -- Note: although the functions in this package are in a sense Pure, the + -- package cannot be declared as Pure, since the arguments are addresses, + -- not the data, and the result is not pure wrt the address values. + + function Compare_Array_S16 + (Left : System.Address; + Right : System.Address; + Left_Len : Natural; + Right_Len : Natural) + return Integer; + -- Compare the array starting at address Left of length Left_Len + -- with the array starting at address Right of length Right_Len. + -- The comparison is in the normal Ada semantic sense of array + -- comparison. The result is -1,0,+1 for Left<Right, Left=Right, + -- Left>Right respectively. This function works with 4 byte words + -- if the operands are aligned on 4-byte boundaries and long enough. + +end System.Compare_Array_Signed_16; |