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added commas, added multi-dimensional tasking to mandelbrot_tasks & removed mandelbrot_task3d. Also adjusted documentaiton a bit

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This commit is contained in:
evghenii
2013-12-13 11:49:11 +01:00
parent 2951cad365
commit c06ec92d0d
13 changed files with 28 additions and 518 deletions
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2
builtins/util.m4
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@@ -1813,7 +1813,7 @@ define(`stdlib_core', `
declare i32 @__fast_masked_vload()
declare i8* @ISPCAlloc(i8**, i64, i32) nounwind
declare void @ISPCLaunch(i8**, i8*, i8*, i32,i32,i32) nounwind
declare void @ISPCLaunch(i8**, i8*, i8*, i32, i32, i32) nounwind
declare void @ISPCSync(i8*) nounwind
declare void @ISPCInstrument(i8*, i8*, i32, i64) nounwind

3
docs/ispc.rst
View File

@@ -3012,8 +3012,7 @@ Intel® Cilk(tm), Intel® Thread Building Blocks or another task system), and
for tasks to use ``ispc`` for SPMD parallelism across the vector lanes as
appropriate. Alternatively, ``ispc`` also has support for launching tasks
from ``ispc`` code. The approach is similar to Intel® Cilk's task launch
feature. (See the ``examples/mandelbrot_tasks`` and
``examples/mandelbrot_tasks3d`` examples to see it used in a small example.)
feature. (Check the ``examples/mandelbrot_tasks`` example to see how it is used.)
Any function that is launched as a task must be declared with the
``task`` qualifier:

2
examples/mandelbrot_tasks/Makefile
View File

@@ -2,7 +2,7 @@
EXAMPLE=mandelbrot_tasks
CPP_SRC=mandelbrot_tasks.cpp mandelbrot_tasks_serial.cpp
ISPC_SRC=mandelbrot_tasks.ispc
ISPC_IA_TARGETS=sse2,sse4-x2,avx-x2
ISPC_IA_TARGETS=sse2,sse4-x2,avx
ISPC_ARM_TARGETS=neon
include ../common.mk

3
examples/mandelbrot_tasks/mandelbrot_tasks.cpp
View File

@@ -38,7 +38,8 @@
#pragma warning (disable: 4305)
#endif
#include <stdio.h>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <string.h>
#include "../timing.h"

29
examples/mandelbrot_tasks/mandelbrot_tasks.ispc
View File

@@ -57,21 +57,26 @@ task void
mandelbrot_scanline(uniform float x0, uniform float dx,
uniform float y0, uniform float dy,
uniform int width, uniform int height,
uniform int span,
uniform int xspan, uniform int yspan,
uniform int maxIterations, uniform int output[]) {
uniform int ystart = taskIndex * span;
uniform int yend = min((taskIndex+1) * span, (unsigned int)height);
const uniform int xstart = taskIndex0 * xspan;
const uniform int xend = min(xstart + xspan, width);
foreach (yi = ystart ... yend, xi = 0 ... width) {
const uniform int ystart = taskIndex1 * yspan;
const uniform int yend = min(ystart + yspan, height);
foreach (yi = ystart ... yend, xi = xstart ... xend) {
float x = x0 + xi * dx;
float y = y0 + yi * dy;
int index = yi * width + xi;
output[index] = mandel(x, y, maxIterations);
}
}
#if 1
export void
mandelbrot_ispc(uniform float x0, uniform float y0,
uniform float x1, uniform float y1,
@@ -79,8 +84,16 @@ mandelbrot_ispc(uniform float x0, uniform float y0,
uniform int maxIterations, uniform int output[]) {
uniform float dx = (x1 - x0) / width;
uniform float dy = (y1 - y0) / height;
uniform int span = 4;
const uniform int xspan = max(32, programCount*2); /* make sure it is big enough to avoid false-sharing */
const uniform int yspan = 16;
launch[height/span] mandelbrot_scanline(x0, dx, y0, dy, width, height, span,
maxIterations, output);
#if 1
launch [width/xspan, height/yspan]
#else
launch [height/yspan][width/xspan]
#endif
mandelbrot_scanline(x0, dx, y0, dy, width, height, xspan, yspan,
maxIterations, output);
}
#endif

2
examples/mandelbrot_tasks3d/.gitignore vendored
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@@ -1,2 +0,0 @@
mandelbrot
*.ppm

8
examples/mandelbrot_tasks3d/Makefile
View File

@@ -1,8 +0,0 @@
EXAMPLE=mandelbrot_tasks3d
CPP_SRC=mandelbrot_tasks3d.cpp mandelbrot_tasks_serial.cpp
ISPC_SRC=mandelbrot_tasks3d.ispc
ISPC_IA_TARGETS=avx,sse2,sse4
ISPC_ARM_TARGETS=neon
include ../common.mk

180
examples/mandelbrot_tasks3d/mandelbrot_tasks.vcxproj
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@@ -1,180 +0,0 @@
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<ItemGroup Label="ProjectConfigurations">
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<Platform>Win32</Platform>
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<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>{E80DA7D4-AB22-4648-A068-327307156BE6}</ProjectGuid>
<Keyword>Win32Proj</Keyword>
<RootNamespace>mandelbrot_tasks</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)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
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<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
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<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" />
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<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" />
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<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" />
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<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>
<TargetName>mandelbrot_tasks</TargetName>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<LinkIncremental>true</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
<TargetName>mandelbrot_tasks</TargetName>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<LinkIncremental>false</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
<TargetName>mandelbrot_tasks</TargetName>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<LinkIncremental>false</LinkIncremental>
<ExecutablePath>$(ProjectDir)..\..;$(ExecutablePath)</ExecutablePath>
<TargetName>mandelbrot_tasks</TargetName>
</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>
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<Link>
<SubSystem>Console</SubSystem>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<PrecompiledHeader>
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<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>
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<Link>
<SubSystem>Console</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
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</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="mandelbrot_tasks.cpp" />
<ClCompile Include="mandelbrot_tasks_serial.cpp" />
<ClCompile Include="../tasksys.cpp" />
</ItemGroup>
<ItemGroup>
<CustomBuild Include="mandelbrot_tasks.ispc">
<FileType>Document</FileType>
<Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --arch=x86 --target=sse2,sse4-x2,avx-x2
</Command>
<Command Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --target=sse2,sse4-x2,avx-x2
</Command>
<Outputs Condition="'$(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 $(TargetDir)%(Filename)_ispc.h --arch=x86 --target=sse2,sse4-x2,avx-x2
</Command>
<Command Condition="'$(Configuration)|$(Platform)'=='Release|x64'">ispc -O2 %(Filename).ispc -o $(TargetDir)%(Filename).obj -h $(TargetDir)%(Filename)_ispc.h --target=sse2,sse4-x2,avx-x2
</Command>
<Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(TargetDir)%(Filename).obj;$(TargetDir)%(Filename)_sse2.obj;$(TargetDir)%(Filename)_sse4.obj;$(TargetDir)%(Filename)_avx.obj;$(TargetDir)%(Filename)_ispc.h</Outputs>
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<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>

146
examples/mandelbrot_tasks3d/mandelbrot_tasks3d.cpp
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@@ -1,146 +0,0 @@
/*
Copyright (c) 2010-2011, 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 <string.h>
#include "../timing.h"
#include "mandelbrot_tasks3d_ispc.h"
using namespace ispc;
extern void mandelbrot_serial(float x0, float y0, float x1, float y1,
int width, int height, int maxIterations,
int output[]);
/* Write a PPM image file with the image of the Mandelbrot set */
static void
writePPM(int *buf, int width, int height, const char *fn) {
FILE *fp = fopen(fn, "wb");
fprintf(fp, "P6\n");
fprintf(fp, "%d %d\n", width, height);
fprintf(fp, "255\n");
for (int i = 0; i < width*height; ++i) {
// Map the iteration count to colors by just alternating between
// two greys.
char c = (buf[i] & 0x1) ? 240 : 20;
for (int j = 0; j < 3; ++j)
fputc(c, fp);
}
fclose(fp);
printf("Wrote image file %s\n", fn);
}
static void usage() {
fprintf(stderr, "usage: mandelbrot [--scale=<factor>]\n");
exit(1);
}
int main(int argc, char *argv[]) {
unsigned int width = 1536;
unsigned int height = 1024;
float x0 = -2;
float x1 = 1;
float y0 = -1;
float y1 = 1;
if (argc == 1)
;
else if (argc == 2) {
if (strncmp(argv[1], "--scale=", 8) == 0) {
float scale = atof(argv[1] + 8);
if (scale == 0.f)
usage();
width *= scale;
height *= scale;
// round up to multiples of 16
width = (width + 0xf) & ~0xf;
height = (height + 0xf) & ~0xf;
}
else
usage();
}
else
usage();
int maxIterations = 512;
int *buf = new int[width*height];
//
// Compute the image using the ispc implementation; report the minimum
// time of three runs.
//
double minISPC = 1e30;
for (int i = 0; i < 3; ++i) {
// Clear out the buffer
for (unsigned int i = 0; i < width * height; ++i)
buf[i] = 0;
reset_and_start_timer();
mandelbrot_ispc(x0, y0, x1, y1, width, height, maxIterations, buf);
double dt = get_elapsed_mcycles();
minISPC = std::min(minISPC, dt);
}
printf("[mandelbrot ispc+tasks]:\t[%.3f] million cycles\n", minISPC);
writePPM(buf, width, height, "mandelbrot-ispc.ppm");
//
// And run the serial implementation 3 times, again reporting the
// minimum time.
//
double minSerial = 1e30;
for (int i = 0; i < 3; ++i) {
// Clear out the buffer
for (unsigned int i = 0; i < width * height; ++i)
buf[i] = 0;
reset_and_start_timer();
mandelbrot_serial(x0, y0, x1, y1, width, height, maxIterations, buf);
double dt = get_elapsed_mcycles();
minSerial = std::min(minSerial, dt);
}
printf("[mandelbrot serial]:\t\t[%.3f] million cycles\n", minSerial);
writePPM(buf, width, height, "mandelbrot-serial.ppm");
printf("\t\t\t\t(%.2fx speedup from ISPC + tasks)\n", minSerial/minISPC);
return 0;
}

99
examples/mandelbrot_tasks3d/mandelbrot_tasks3d.ispc
View File

@@ -1,99 +0,0 @@
/*
Copyright (c) 2010-2012, 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.
*/
static inline int
mandel(float c_re, float c_im, int count) {
float z_re = c_re, z_im = c_im;
int i;
for (i = 0; i < count; ++i) {
if (z_re * z_re + z_im * z_im > 4.)
break;
float new_re = z_re*z_re - z_im*z_im;
float new_im = 2.f * z_re * z_im;
unmasked {
z_re = c_re + new_re;
z_im = c_im + new_im;
}
}
return i;
}
/* Task to compute the Mandelbrot iterations for a single scanline.
*/
task void
mandelbrot_scanline(uniform float x0, uniform float dx,
uniform float y0, uniform float dy,
uniform int width, uniform int height,
uniform int xspan, uniform int yspan,
uniform int maxIterations, uniform int output[]) {
const uniform int xstart = taskIndex0 * xspan;
const uniform int xend = min(xstart + xspan, width);
const uniform int ystart = taskIndex1 * yspan;
const uniform int yend = min(ystart + yspan, height);
foreach (yi = ystart ... yend, xi = xstart ... xend) {
float x = x0 + xi * dx;
float y = y0 + yi * dy;
int index = yi * width + xi;
output[index] = mandel(x, y, maxIterations);
}
}
#if 1
export void
mandelbrot_ispc(uniform float x0, uniform float y0,
uniform float x1, uniform float y1,
uniform int width, uniform int height,
uniform int maxIterations, uniform int output[]) {
uniform float dx = (x1 - x0) / width;
uniform float dy = (y1 - y0) / height;
const uniform int xspan = 16; /* make sure it is big enough to avoid false-sharing */
const uniform int yspan = 16;
#if 1
launch [width/xspan, height/yspan]
#else
launch [height/yspan][width/xspan]
#endif
mandelbrot_scanline(x0, dx, y0, dy, width, height, xspan, yspan,
maxIterations, output);
}
#endif

68
examples/mandelbrot_tasks3d/mandelbrot_tasks_serial.cpp
View File

@@ -1,68 +0,0 @@
/*
Copyright (c) 2010-2011, 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.
*/
static int mandel(float c_re, float c_im, int count) {
float z_re = c_re, z_im = c_im;
int i;
for (i = 0; i < count; ++i) {
if (z_re * z_re + z_im * z_im > 4.f)
break;
float new_re = z_re*z_re - z_im*z_im;
float new_im = 2.f * z_re * z_im;
z_re = c_re + new_re;
z_im = c_im + new_im;
}
return i;
}
void mandelbrot_serial(float x0, float y0, float x1, float y1,
int width, int height, int maxIterations,
int output[])
{
float dx = (x1 - x0) / width;
float dy = (y1 - y0) / height;
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; ++i) {
float x = x0 + i * dx;
float y = y0 + j * dy;
int index = (j * width + i);
output[index] = mandel(x, y, maxIterations);
}
}
}

2
examples/tasksys.cpp
View File

@@ -204,7 +204,7 @@ struct TaskInfo {
// ispc expects these functions to have C linkage / not be mangled
extern "C" {
void ISPCLaunch(void **handlePtr, void *f, void *data, int countx,int county, int countz);
void ISPCLaunch(void **handlePtr, void *f, void *data, int countx, int county, int countz);
void *ISPCAlloc(void **handlePtr, int64_t size, int32_t alignment);
void ISPCSync(void *handle);
}

2
test_static.cpp
View File

@@ -69,7 +69,7 @@ extern "C" {
void ISPCLaunch(void **handle, void *f, void *d, int count0, int count1, int count2) {
*handle = (void *)0xdeadbeef;
typedef void (*TaskFuncType)(void *, int, int, int, int, int,int,int, int,int,int);
typedef void (*TaskFuncType)(void *, int, int, int, int, int, int, int, int, int, int);
TaskFuncType func = (TaskFuncType)f;
int count = count0*count1*count2, idx = 0;
for (int k = 0; k < count2; ++k)