| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- G N A T . S S E . V E C T O R _ T Y P E S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 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 exposes the Ada __m128 like data types to represent the contents |
| -- of SSE registers, for use by bindings to the SSE intrinsic operations. |
| |
| -- See GNAT.SSE for the list of targets where this facility is supported |
| |
| package GNAT.SSE.Vector_Types is |
| |
| -- The reference guide states a few usage guidelines for the C types: |
| |
| -- Since these new data types are not basic ANSI C data types, you |
| -- must observe the following usage restrictions: |
| -- |
| -- * Use new data types only on either side of an assignment, as a |
| -- return value, or as a parameter. You cannot use it with other |
| -- arithmetic expressions ("+", "-", and so on). |
| -- |
| -- * Use new data types as objects in aggregates, such as unions to |
| -- access the byte elements and structures. |
| -- |
| -- * Use new data types only with the respective intrinsics described |
| -- in this documentation. |
| |
| type m128 is private; -- SSE >= 1 |
| type m128d is private; -- SSE >= 2 |
| type m128i is private; -- SSE >= 2 |
| |
| private |
| -- Each of the m128 types maps to a specific vector_type with an extra |
| -- "may_alias" attribute as in GCC's definitions for C, for instance in |
| -- xmmintrin.h: |
| |
| -- /* The Intel API is flexible enough that we must allow aliasing |
| -- with other vector types, and their scalar components. */ |
| -- typedef float __m128 |
| -- __attribute__ ((__vector_size__ (16), __may_alias__)); |
| |
| -- /* Internal data types for implementing the intrinsics. */ |
| -- typedef float __v4sf __attribute__ ((__vector_size__ (16))); |
| |
| ------------ |
| -- m128 -- |
| ------------ |
| |
| -- The __m128 data type can hold four 32-bit floating-point values |
| |
| type m128 is array (1 .. 4) of Float32; |
| for m128'Alignment use VECTOR_ALIGN; |
| pragma Machine_Attribute (m128, "vector_type"); |
| pragma Machine_Attribute (m128, "may_alias"); |
| |
| ------------- |
| -- m128d -- |
| ------------- |
| |
| -- The __m128d data type can hold two 64-bit floating-point values |
| |
| type m128d is array (1 .. 2) of Float64; |
| for m128d'Alignment use VECTOR_ALIGN; |
| pragma Machine_Attribute (m128d, "vector_type"); |
| pragma Machine_Attribute (m128d, "may_alias"); |
| |
| ------------- |
| -- m128i -- |
| ------------- |
| |
| -- The __m128i data type can hold sixteen 8-bit, eight 16-bit, four 32-bit, |
| -- or two 64-bit integer values. |
| |
| type m128i is array (1 .. 2) of Integer64; |
| for m128i'Alignment use VECTOR_ALIGN; |
| pragma Machine_Attribute (m128i, "vector_type"); |
| pragma Machine_Attribute (m128i, "may_alias"); |
| |
| end GNAT.SSE.Vector_Types; |
