| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- G N A T . A L T I V E C . V E C T O R _ V I E W S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 2005-2009, 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 public 'View' data types from/to which private vector |
| -- representations can be converted via Altivec.Conversions. This allows |
| -- convenient access to individual vector elements and provides a simple way |
| -- to initialize vector objects. |
| |
| -- Accessing vector contents with direct memory overlays should be avoided |
| -- because actual vector representations may vary across configurations, for |
| -- instance to accommodate different target endianness. |
| |
| -- The natural representation of a vector is an array indexed by vector |
| -- component number, which is materialized by the Varray type definitions |
| -- below. The 16byte alignment constraint is unfortunately sometimes not |
| -- properly honored for constant array aggregates, so the View types are |
| -- actually records enclosing such arrays. |
| |
| package GNAT.Altivec.Vector_Views is |
| |
| --------------------- |
| -- char components -- |
| --------------------- |
| |
| type Vchar_Range is range 1 .. 16; |
| |
| type Varray_unsigned_char is array (Vchar_Range) of unsigned_char; |
| for Varray_unsigned_char'Alignment use VECTOR_ALIGNMENT; |
| |
| type VUC_View is record |
| Values : Varray_unsigned_char; |
| end record; |
| |
| type Varray_signed_char is array (Vchar_Range) of signed_char; |
| for Varray_signed_char'Alignment use VECTOR_ALIGNMENT; |
| |
| type VSC_View is record |
| Values : Varray_signed_char; |
| end record; |
| |
| type Varray_bool_char is array (Vchar_Range) of bool_char; |
| for Varray_bool_char'Alignment use VECTOR_ALIGNMENT; |
| |
| type VBC_View is record |
| Values : Varray_bool_char; |
| end record; |
| |
| ---------------------- |
| -- short components -- |
| ---------------------- |
| |
| type Vshort_Range is range 1 .. 8; |
| |
| type Varray_unsigned_short is array (Vshort_Range) of unsigned_short; |
| for Varray_unsigned_short'Alignment use VECTOR_ALIGNMENT; |
| |
| type VUS_View is record |
| Values : Varray_unsigned_short; |
| end record; |
| |
| type Varray_signed_short is array (Vshort_Range) of signed_short; |
| for Varray_signed_short'Alignment use VECTOR_ALIGNMENT; |
| |
| type VSS_View is record |
| Values : Varray_signed_short; |
| end record; |
| |
| type Varray_bool_short is array (Vshort_Range) of bool_short; |
| for Varray_bool_short'Alignment use VECTOR_ALIGNMENT; |
| |
| type VBS_View is record |
| Values : Varray_bool_short; |
| end record; |
| |
| -------------------- |
| -- int components -- |
| -------------------- |
| |
| type Vint_Range is range 1 .. 4; |
| |
| type Varray_unsigned_int is array (Vint_Range) of unsigned_int; |
| for Varray_unsigned_int'Alignment use VECTOR_ALIGNMENT; |
| |
| type VUI_View is record |
| Values : Varray_unsigned_int; |
| end record; |
| |
| type Varray_signed_int is array (Vint_Range) of signed_int; |
| for Varray_signed_int'Alignment use VECTOR_ALIGNMENT; |
| |
| type VSI_View is record |
| Values : Varray_signed_int; |
| end record; |
| |
| type Varray_bool_int is array (Vint_Range) of bool_int; |
| for Varray_bool_int'Alignment use VECTOR_ALIGNMENT; |
| |
| type VBI_View is record |
| Values : Varray_bool_int; |
| end record; |
| |
| ---------------------- |
| -- float components -- |
| ---------------------- |
| |
| type Vfloat_Range is range 1 .. 4; |
| |
| type Varray_float is array (Vfloat_Range) of C_float; |
| for Varray_float'Alignment use VECTOR_ALIGNMENT; |
| |
| type VF_View is record |
| Values : Varray_float; |
| end record; |
| |
| ---------------------- |
| -- pixel components -- |
| ---------------------- |
| |
| type Vpixel_Range is range 1 .. 8; |
| |
| type Varray_pixel is array (Vpixel_Range) of pixel; |
| for Varray_pixel'Alignment use VECTOR_ALIGNMENT; |
| |
| type VP_View is record |
| Values : Varray_pixel; |
| end record; |
| |
| end GNAT.Altivec.Vector_Views; |
