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Diffstat (limited to 'gcc/ada/g-alvety.ads')
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diff --git a/gcc/ada/g-alvety.ads b/gcc/ada/g-alvety.ads new file mode 100644 index 00000000000..03b637e0da2 --- /dev/null +++ b/gcc/ada/g-alvety.ads @@ -0,0 +1,152 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G N A T . A L T I V E C . V E C T O R _ T Y P E S -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2004-2005, 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 unit exposes the various vector types part of the Ada binding to +-- Altivec facilities. + +with GNAT.Altivec.Low_Level_Vectors; + +package GNAT.Altivec.Vector_Types is + + use GNAT.Altivec.Low_Level_Vectors; + + --------------------------------------------------- + -- Vector type declarations [PIM-2.1 Data Types] -- + --------------------------------------------------- + + -- Except for assignments and pointer creation/dereference, operations + -- on vectors are only performed via subprograms. The vector types are + -- then private, and non-limited since assignments are allowed. + + -- The Hard/Soft binding type-structure differentiation is achieved in + -- Low_Level_Vectors. Each version only exposes private vector types, that + -- we just sub-type here. This is fine from the design standpoint and + -- reduces the amount of explicit conversion required in various places + -- internally. + + subtype vector_unsigned_char is Low_Level_Vectors.LL_VUC; + subtype vector_signed_char is Low_Level_Vectors.LL_VSC; + subtype vector_bool_char is Low_Level_Vectors.LL_VBC; + + subtype vector_unsigned_short is Low_Level_Vectors.LL_VUS; + subtype vector_signed_short is Low_Level_Vectors.LL_VSS; + subtype vector_bool_short is Low_Level_Vectors.LL_VBS; + + subtype vector_unsigned_int is Low_Level_Vectors.LL_VUI; + subtype vector_signed_int is Low_Level_Vectors.LL_VSI; + subtype vector_bool_int is Low_Level_Vectors.LL_VBI; + + subtype vector_float is Low_Level_Vectors.LL_VF; + subtype vector_pixel is Low_Level_Vectors.LL_VP; + + -- [PIM-2.1] shows groups of declarations with exact same component types, + -- e.g. vector unsigned short together with vector unsigned short int. It + -- so appears tempting to define subtypes for those matches here. + -- + -- [PIM-2.1] does not qualify items in those groups as "the same types", + -- though, and [PIM-2.4.2 Assignments] reads: "if either the left hand + -- side or the right hand side of an expression has a vector type, then + -- both sides of the expression must be of the same vector type". + -- + -- Not so clear what is exactly right, then. We go with subtypes for now + -- and can adjust later if need be. + + subtype vector_unsigned_short_int is vector_unsigned_short; + subtype vector_signed_short_int is vector_signed_short; + + subtype vector_char is vector_signed_char; + subtype vector_short is vector_signed_short; + subtype vector_int is vector_signed_int; + + -------------------------------- + -- Corresponding access types -- + -------------------------------- + + type vector_unsigned_char_ptr is access all vector_unsigned_char; + type vector_signed_char_ptr is access all vector_signed_char; + type vector_bool_char_ptr is access all vector_bool_char; + + type vector_unsigned_short_ptr is access all vector_unsigned_short; + type vector_signed_short_ptr is access all vector_signed_short; + type vector_bool_short_ptr is access all vector_bool_short; + + type vector_unsigned_int_ptr is access all vector_unsigned_int; + type vector_signed_int_ptr is access all vector_signed_int; + type vector_bool_int_ptr is access all vector_bool_int; + + type vector_float_ptr is access all vector_float; + type vector_pixel_ptr is access all vector_pixel; + + -------------------------------------------------------------------- + -- Additional access types, for the sake of some argument passing -- + -------------------------------------------------------------------- + + -- ... because some of the operations expect pointers to possibly + -- constant objects. + + type const_vector_bool_char_ptr is access constant vector_bool_char; + type const_vector_signed_char_ptr is access constant vector_signed_char; + type const_vector_unsigned_char_ptr is access constant vector_unsigned_char; + + type const_vector_bool_short_ptr is access constant vector_bool_short; + type const_vector_signed_short_ptr is access constant vector_signed_short; + type const_vector_unsigned_short_ptr is access + constant vector_unsigned_short; + + type const_vector_bool_int_ptr is access constant vector_bool_int; + type const_vector_signed_int_ptr is access constant vector_signed_int; + type const_vector_unsigned_int_ptr is access constant vector_unsigned_int; + + type const_vector_float_ptr is access constant vector_float; + type const_vector_pixel_ptr is access constant vector_pixel; + + ---------------------- + -- Useful shortcuts -- + ---------------------- + + subtype VUC is vector_unsigned_char; + subtype VSC is vector_signed_char; + subtype VBC is vector_bool_char; + + subtype VUS is vector_unsigned_short; + subtype VSS is vector_signed_short; + subtype VBS is vector_bool_short; + + subtype VUI is vector_unsigned_int; + subtype VSI is vector_signed_int; + subtype VBI is vector_bool_int; + + subtype VP is vector_pixel; + subtype VF is vector_float; + +end GNAT.Altivec.Vector_Types; |