------------------------------------------------------------------------------ -- -- -- 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 -- -- . -- -- -- -- 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;