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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- G N A T . A L T I V E C . V E C T O R _ T Y P E S --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 2004-2017, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
17 -- --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 -- This unit exposes the various vector types part of the Ada binding to
33 -- Altivec facilities.
34
35 with GNAT.Altivec.Low_Level_Vectors;
36
37 package GNAT.Altivec.Vector_Types is
38
39 ---------------------------------------------------
40 -- Vector type declarations [PIM-2.1 Data Types] --
41 ---------------------------------------------------
42
43 -- Except for assignments and pointer creation/dereference, operations
44 -- on vectors are only performed via subprograms. The vector types are
45 -- then private, and non-limited since assignments are allowed.
46
47 -- The Hard/Soft binding type-structure differentiation is achieved in
48 -- Low_Level_Vectors. Each version only exposes private vector types, that
49 -- we just sub-type here. This is fine from the design standpoint and
50 -- reduces the amount of explicit conversion required in various places
51 -- internally.
52
53 subtype vector_unsigned_char is Low_Level_Vectors.LL_VUC;
54 subtype vector_signed_char is Low_Level_Vectors.LL_VSC;
55 subtype vector_bool_char is Low_Level_Vectors.LL_VBC;
56
57 subtype vector_unsigned_short is Low_Level_Vectors.LL_VUS;
58 subtype vector_signed_short is Low_Level_Vectors.LL_VSS;
59 subtype vector_bool_short is Low_Level_Vectors.LL_VBS;
60
61 subtype vector_unsigned_int is Low_Level_Vectors.LL_VUI;
62 subtype vector_signed_int is Low_Level_Vectors.LL_VSI;
63 subtype vector_bool_int is Low_Level_Vectors.LL_VBI;
64
65 subtype vector_float is Low_Level_Vectors.LL_VF;
66 subtype vector_pixel is Low_Level_Vectors.LL_VP;
67
68 -- [PIM-2.1] shows groups of declarations with exact same component types,
69 -- e.g. vector unsigned short together with vector unsigned short int. It
70 -- so appears tempting to define subtypes for those matches here.
71 --
72 -- [PIM-2.1] does not qualify items in those groups as "the same types",
73 -- though, and [PIM-2.4.2 Assignments] reads: "if either the left hand
74 -- side or the right hand side of an expression has a vector type, then
75 -- both sides of the expression must be of the same vector type".
76 --
77 -- Not so clear what is exactly right, then. We go with subtypes for now
78 -- and can adjust later if need be.
79
80 subtype vector_unsigned_short_int is vector_unsigned_short;
81 subtype vector_signed_short_int is vector_signed_short;
82
83 subtype vector_char is vector_signed_char;
84 subtype vector_short is vector_signed_short;
85 subtype vector_int is vector_signed_int;
86
87 --------------------------------
88 -- Corresponding access types --
89 --------------------------------
90
91 type vector_unsigned_char_ptr is access all vector_unsigned_char;
92 type vector_signed_char_ptr is access all vector_signed_char;
93 type vector_bool_char_ptr is access all vector_bool_char;
94
95 type vector_unsigned_short_ptr is access all vector_unsigned_short;
96 type vector_signed_short_ptr is access all vector_signed_short;
97 type vector_bool_short_ptr is access all vector_bool_short;
98
99 type vector_unsigned_int_ptr is access all vector_unsigned_int;
100 type vector_signed_int_ptr is access all vector_signed_int;
101 type vector_bool_int_ptr is access all vector_bool_int;
102
103 type vector_float_ptr is access all vector_float;
104 type vector_pixel_ptr is access all vector_pixel;
105
106 --------------------------------------------------------------------
107 -- Additional access types, for the sake of some argument passing --
108 --------------------------------------------------------------------
109
110 -- ... because some of the operations expect pointers to possibly
111 -- constant objects.
112
113 type const_vector_bool_char_ptr is access constant vector_bool_char;
114 type const_vector_signed_char_ptr is access constant vector_signed_char;
115 type const_vector_unsigned_char_ptr is access constant vector_unsigned_char;
116
117 type const_vector_bool_short_ptr is access constant vector_bool_short;
118 type const_vector_signed_short_ptr is access constant vector_signed_short;
119 type const_vector_unsigned_short_ptr is access
120 constant vector_unsigned_short;
121
122 type const_vector_bool_int_ptr is access constant vector_bool_int;
123 type const_vector_signed_int_ptr is access constant vector_signed_int;
124 type const_vector_unsigned_int_ptr is access constant vector_unsigned_int;
125
126 type const_vector_float_ptr is access constant vector_float;
127 type const_vector_pixel_ptr is access constant vector_pixel;
128
129 ----------------------
130 -- Useful shortcuts --
131 ----------------------
132
133 subtype VUC is vector_unsigned_char;
134 subtype VSC is vector_signed_char;
135 subtype VBC is vector_bool_char;
136
137 subtype VUS is vector_unsigned_short;
138 subtype VSS is vector_signed_short;
139 subtype VBS is vector_bool_short;
140
141 subtype VUI is vector_unsigned_int;
142 subtype VSI is vector_signed_int;
143 subtype VBI is vector_bool_int;
144
145 subtype VP is vector_pixel;
146 subtype VF is vector_float;
147
148 end GNAT.Altivec.Vector_Types;