From 117e22047c5752352342d64e3fb7ce00a4eb8113 Mon Sep 17 00:00:00 2001 From: Jacek Antonelli Date: Fri, 15 Aug 2008 23:45:04 -0500 Subject: Second Life viewer sources 1.18.1.2 --- linden/indra/llmath/llv4math.h | 143 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 linden/indra/llmath/llv4math.h (limited to 'linden/indra/llmath/llv4math.h') diff --git a/linden/indra/llmath/llv4math.h b/linden/indra/llmath/llv4math.h new file mode 100644 index 0000000..2853ab6 --- /dev/null +++ b/linden/indra/llmath/llv4math.h @@ -0,0 +1,143 @@ +/** + * @file llv4math.h + * @brief LLV4* class header file - vector processor enabled math + * + * Copyright (c) 2007-2007, Linden Research, Inc. + * + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlife.com/developers/opensource/gplv2 + * + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at http://secondlife.com/developers/opensource/flossexception + * + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. + * + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. + */ + +#ifndef LL_LLV4MATH_H +#define LL_LLV4MATH_H + +// *NOTE: We do not support SSE acceleration on Windows builds. +// Our minimum specification for the viewer includes 1 GHz Athlon processors, +// which covers the Athlon Thunderbird series that does not support SSE. +// +// Our header files include statements like this +// const F32 HAVOK_TIMESTEP = 1.f / 45.f; +// This creates "globals" that are included in each .obj file. If a single +// .cpp file has SSE code generation turned on (eg, llviewerjointmesh_sse.cpp) +// these globals will be initialized using SSE instructions. This causes SL +// to crash before main() on processors without SSE. Untangling all these +// headers/variables is too much work for the small performance gains of +// vectorization. +// +// Therefore we only support vectorization on builds where the everything is +// built with SSE or Altivec. See https://jira.secondlife.com/browse/VWR-1610 +// and https://jira.lindenlab.com/browse/SL-47720 for details. +// +// Sorry the code is such a mess. JC + +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- +// LLV4MATH - GNUC +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- + +#if LL_GNUC && __GNUC__ >= 4 && __SSE__ + +#define LL_VECTORIZE 1 + +#if LL_DARWIN + +#include +#include +typedef vFloat V4F32; + +#else + +#include +typedef float V4F32 __attribute__((vector_size(16))); + +#endif + +#endif +#if LL_GNUC + +#define LL_LLV4MATH_ALIGN_PREFIX +#define LL_LLV4MATH_ALIGN_POSTFIX __attribute__((aligned(16))) + +#endif + +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- +// LLV4MATH - MSVC +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- + +// Only vectorize if the entire Windows build uses SSE. +// _M_IX86_FP is set when SSE code generation is turned on, and I have +// confirmed this in VS2003, VS2003 SP1, and VS2005. JC +#if LL_MSVC && _M_IX86_FP + +#define LL_VECTORIZE 1 + +#include + +typedef __m128 V4F32; + +#endif +#if LL_MSVC + +#define LL_LLV4MATH_ALIGN_PREFIX __declspec(align(16)) +#define LL_LLV4MATH_ALIGN_POSTFIX + +#endif + +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- +// LLV4MATH - default - no vectorization +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- + +#if !LL_VECTORIZE + +#define LL_VECTORIZE 0 + +struct V4F32 { F32 __pad__[4]; }; + +inline F32 llv4lerp(F32 a, F32 b, F32 w) { return ( b - a ) * w + a; } + +#endif + +#ifndef LL_LLV4MATH_ALIGN_PREFIX +# define LL_LLV4MATH_ALIGN_PREFIX +#endif +#ifndef LL_LLV4MATH_ALIGN_POSTFIX +# define LL_LLV4MATH_ALIGN_POSTFIX +#endif + +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- +// LLV4MATH +//----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- + + +#define LLV4_NUM_AXIS 4 + +class LLV4Vector3; +class LLV4Matrix3; +class LLV4Matrix4; + +#endif -- cgit v1.1