aaron/ispc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add perfbench to examples: a few small microbenchmarks.

Browse Source
This commit is contained in:
Matt Pharr
2012-02-10 12:27:13 -08:00
parent 1dead425e4
commit fe2d9aa600
6 changed files with 528 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
examples/README.txt
View File

@@ -39,9 +39,6 @@ example implementation of this function that counts the number of times the
callback is made and records some statistics about control flow coherence callback is made and records some statistics about control flow coherence
is provided in the instrument.cpp file. is provided in the instrument.cpp file.
*** Note: on Linux, this example currently hits an assertion in LLVM during
*** compilation
Deferred Deferred
======== ========
@@ -110,6 +107,13 @@ This program implements both the Black-Scholes and Binomial options pricing
models in both ispc and regular serial C++ code. models in both ispc and regular serial C++ code.
Perfbench
=========
This runs a number of microbenchmarks to measure system performance and
code generation quality.
RT RT
== ==

7
examples/perfbench/Makefile Normal file
View File

@@ -0,0 +1,7 @@
EXAMPLE=perbench
CPP_SRC=perfbench.cpp perfbench_serial.cpp
ISPC_SRC=perfbench.ispc
ISPC_TARGETS=sse2,sse4,avx
include ../common.mk

108
examples/perfbench/perfbench.cpp Normal file
View File

@@ -0,0 +1,108 @@
/*
Copyright (c) 2012, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#define NOMINMAX
#pragma warning (disable: 4244)
#pragma warning (disable: 4305)
#endif
#include <stdio.h>
#include <algorithm>
#include "../timing.h"
#include "perfbench_ispc.h"
typedef void (FuncType)(float *, int, float *, float *);
struct PerfTest {
FuncType *aFunc;
const char *aName;
FuncType *bFunc;
const char *bName;
const char *testName;
};
extern void xyzSumAOS(float *a, int count, float *zeros, float *result);
extern void xyzSumSOA(float *a, int count, float *zeros, float *result);
static void
lInitData(float *ptr, int count) {
for (int i = 0; i < count; ++i)
ptr[i] = float(i) / (1024.f * 1024.f);
}
static PerfTest tests[] = {
{ xyzSumAOS, "serial", ispc::xyzSumAOS, "ispc", "AOS vector element sum (with coalescing)" },
{ xyzSumAOS, "serial", ispc::xyzSumAOSStdlib, "ispc", "AOS vector element sum (stdlib swizzle)" },
{ xyzSumAOS, "serial", ispc::xyzSumAOSNoCoalesce, "ispc", "AOS vector element sum (no coalescing)" },
{ xyzSumSOA, "serial", ispc::xyzSumSOA, "ispc", "SOA vector element sum" },
{ ispc::gathers, "gather", ispc::loads, "vector load", "Memory reads" },
{ ispc::scatters, "scatter", ispc::stores, "vector store", "Memory writes" },
};
int main() {
int count = 3*64*1024;
float *a = new float[count];
float zeros[32] = { 0 };
int nTests = sizeof(tests) / sizeof(tests[0]);
for (int i = 0; i < nTests; ++i) {
lInitData(a, count);
reset_and_start_timer();
float resultA[3] = { 0, 0, 0 };
for (int j = 0; j < 100; ++j)
tests[i].aFunc(a, count, zeros, resultA);
double aTime = get_elapsed_mcycles();
lInitData(a, count);
reset_and_start_timer();
float resultB[3] = { 0, 0, 0 };
for (int j = 0; j < 100; ++j)
tests[i].bFunc(a, count, zeros, resultB);
double bTime = get_elapsed_mcycles();
printf("%-40s: [%.2f] M cycles %s, [%.2f] M cycles %s (%.2fx speedup).\n",
tests[i].testName, aTime, tests[i].aName, bTime, tests[i].bName,
aTime/bTime);
#if 0
printf("\t(%f %f %f) - (%f %f %f)\n", resultSerial[0], resultSerial[1],
resultSerial[2], resultISPC[0], resultISPC[1], resultISPC[2]);
#endif
}
return 0;
}

170
examples/perfbench/perfbench.ispc Normal file
View File

@@ -0,0 +1,170 @@
/*
Copyright (c) 2012, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
export void xyzSumAOS(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
float xsum = 0, ysum = 0, zsum = 0;
foreach (i = 0 ... count/3) {
float x = array[3*i];
float y = array[3*i+1];
float z = array[3*i+2];
xsum += x;
ysum += y;
zsum += z;
}
result[0] = reduce_add(xsum);
result[1] = reduce_add(ysum);
result[2] = reduce_add(zsum);
}
export void xyzSumAOSStdlib(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
float xsum = 0, ysum = 0, zsum = 0;
for (uniform int i = 0; i < 64*1024 /*count/3*/; i += programCount) {
float x, y, z;
aos_to_soa3(&array[3*i], &x, &y, &z);
xsum += x;
ysum += y;
zsum += z;
}
result[0] = reduce_add(xsum);
result[1] = reduce_add(ysum);
result[2] = reduce_add(zsum);
}
export void xyzSumAOSNoCoalesce(uniform float array[], uniform int count,
uniform float zerosArray[], uniform float result[]) {
int zeros = zerosArray[programIndex];
float xsum = 0, ysum = 0, zsum = 0;
foreach (i = 0 ... count/3) {
float x = array[3*i+zeros];
float y = array[3*i+1+zeros];
float z = array[3*i+2+zeros];
xsum += x;
ysum += y;
zsum += z;
}
result[0] = reduce_add(xsum);
result[1] = reduce_add(ysum);
result[2] = reduce_add(zsum);
}
export void xyzSumSOA(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
float xsum = 0, ysum = 0, zsum = 0;
uniform float * uniform ap = array;
assert(programCount <= 8);
for (uniform int i = 0; i < count/3; i += 8, ap += 24) {
for (uniform int j = 0; j < 8; j += programCount) {
float x = ap[j + programIndex];
float y = ap[8 + j + programIndex];
float z = ap[16 + j + programIndex];
xsum += x;
ysum += y;
zsum += z;
}
}
result[0] = reduce_add(xsum);
result[1] = reduce_add(ysum);
result[2] = reduce_add(zsum);
}
export void gathers(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
float sum = 0;
int zero = zeros[programIndex];
foreach (i = 0 ... count)
sum += array[i + zero];
result[0] = reduce_add(sum);
}
export void loads(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
float sum = 0;
foreach (i = 0 ... count)
sum += array[i];
result[0] = reduce_add(sum);
}
export void scatters(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
int zero = zeros[programIndex];
foreach (i = 0 ... count)
array[i + zero] = zero;
}
export void stores(uniform float array[], uniform int count,
uniform float zeros[], uniform float result[]) {
int zero = zeros[programIndex];
foreach (i = 0 ... count)
array[i] = zero;
}
export void normalizeAOSNoCoalesce(uniform float array[], uniform int count,
uniform float zeroArray[]) {
float zeros = zeroArray[programIndex];
foreach (i = 0 ... count/3) {
float x = array[3*i+zeros];
float y = array[3*i+1+zeros];
float z = array[3*i+2+zeros];
float l2 = x*x + y*y + z*z;
array[3*i] /= l2;
array[3*i+1] /= l2;
array[3*i+2] /= l2;
}
}
export void normalizeSOA(uniform float array[], uniform int count,
uniform float zeros[]) {
foreach (i = 0 ... count/3) {
float x = array[3*i];
float y = array[3*i+1];
float z = array[3*i+2];
float l2 = x*x + y*y + z*z;
array[3*i] /= l2;
array[3*i+1] /= l2;
array[3*i+2] /= l2;
}
}

175
examples/perfbench/perfbench.vcxproj Normal file
View File

@@ -0,0 +1,175 @@
<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup Label="ProjectConfigurations">
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|x64">
<Configuration>Debug</Configuration>
<Platform>x64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|Win32">
<Configuration>Release</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|x64">
<Configuration>Release</Configuration>
<Platform>x64</Platform>
</ProjectConfiguration>
</ItemGroup>
<PropertyGroup Label="Globals">
<ProjectGuid>{d923bb7e-a7c8-4850-8fcf-0eb9ce35b4e8}</ProjectGuid>
<Keyword>Win32Proj</Keyword>
<RootNamespace>perfbench</RootNamespace>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<LinkIncremental>true</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<LinkIncremental>true</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<LinkIncremental>false</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<LinkIncremental>false</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
<PrecompiledHeader>
</PrecompiledHeader>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>$(TargetDir)</AdditionalIncludeDirectories>
<IntrinsicFunctions>true</IntrinsicFunctions>
<FloatingPointModel>Fast</FloatingPointModel>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<ClCompile>
<PrecompiledHeader>
</PrecompiledHeader>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>$(TargetDir)</AdditionalIncludeDirectories>
<IntrinsicFunctions>true</IntrinsicFunctions>
<FloatingPointModel>Fast</FloatingPointModel>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<PrecompiledHeader>
</PrecompiledHeader>
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>$(TargetDir)</AdditionalIncludeDirectories>
<FloatingPointModel>Fast</FloatingPointModel>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<PrecompiledHeader>
</PrecompiledHeader>
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>$(TargetDir)</AdditionalIncludeDirectories>
<FloatingPointModel>Fast</FloatingPointModel>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
</Link>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="perfbench.cpp" />
<ClCompile Include="perfbench_serial.cpp" />
</ItemGroup>
<ItemGroup>
<CustomBuild Include="perfbench.ispc">
<FileType>Document</FileType>
<Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --arch=x86 --target=sse2,sse4,avx
</Command>
<Command Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --target=sse2,sse4,avx
</Command>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(TargetDir)%(Filename).obj;$(TargetDir)%(Filename)_sse2.obj;$(TargetDir)%(Filename)_sse4.obj;$(TargetDir)%(Filename)_avx.obj;$(TargetDir)%(Filename)_ispc.h</Outputs>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(TargetDir)%(Filename).obj;$(TargetDir)%(Filename)_sse2.obj;$(TargetDir)%(Filename)_sse4.obj;$(TargetDir)%(Filename)_avx.obj;$(TargetDir)%(Filename)_ispc.h</Outputs>
<Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --arch=x86 --target=sse2,sse4,avx
</Command>
<Command Condition="'$(Configuration)|$(Platform)'=='Release|x64'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --target=sse2,sse4,avx
</Command>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(TargetDir)%(Filename).obj;$(TargetDir)%(Filename)_sse2.obj;$(TargetDir)%(Filename)_sse4.obj;$(TargetDir)%(Filename)_avx.obj;$(TargetDir)%(Filename)_ispc.h</Outputs>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(TargetDir)%(Filename).obj;$(TargetDir)%(Filename)_sse2.obj;$(TargetDir)%(Filename)_sse4.obj;$(TargetDir)%(Filename)_avx.obj;$(TargetDir)%(Filename)_ispc.h</Outputs>
</CustomBuild>
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>

61
examples/perfbench/perfbench_serial.cpp Normal file
View File

@@ -0,0 +1,61 @@
/*
Copyright (c) 2012, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <math.h>
void
xyzSumAOS(float *a, int count, float *zeros, float *result) {
float xsum = 0, ysum = 0, zsum = 0;
for (int i = 0; i < count; i += 3) {
xsum += a[i];
ysum += a[i+1];
zsum += a[i+2];
}
result[0] = xsum;
result[1] = ysum;
result[2] = zsum;
}
void
xyzSumSOA(float *a, int count, float *zeros, float *result) {
float xsum = 0, ysum = 0, zsum = 0;
for (int i = 0; i < count/3; ++i) {
float *p = a + (i >> 3) * 24 + (i & 7);
xsum += p[0];
ysum += p[8];
zsum += p[16];
}
result[0] = xsum;
result[1] = ysum;
result[2] = zsum;
}