6b0a6c0124
- In the ispc-generated header files, a #define now indicates which compilation target was used. - The examples use utility routines from the new file examples/cpuid.h to check the system's CPU's capabilities to see if it supports the ISA that was used for compiling the example code and print error messages if things aren't going to work...
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/*
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Copyright (c) 2010-2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "../cpuid.h"
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// Include the header file that the ispc compiler generates
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#include "simple_ispc.h"
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using namespace ispc;
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// Make sure that the vector ISA used during compilation is supported by
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// the processor. The ISPC_TARGET_* macro is set in the ispc-generated
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// header file that we include above.
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static void
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ensureTargetISAIsSupported() {
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#if defined(ISPC_TARGET_SSE2)
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bool isaSupported = CPUSupportsSSE2();
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const char *target = "SSE2";
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#elif defined(ISPC_TARGET_SSE4)
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bool isaSupported = CPUSupportsSSE4();
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const char *target = "SSE4";
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#elif defined(ISPC_TARGET_AVX)
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bool isaSupported = CPUSupportsAVX();
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const char *target = "AVX";
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#else
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#error "Unknown ISPC_TARGET_* value"
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#endif
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if (!isaSupported) {
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fprintf(stderr, "***\n*** Error: the ispc-compiled code uses the %s instruction "
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"set, which isn't\n*** supported by this computer's CPU!\n", target);
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fprintf(stderr, "***\n*** Please modify the "
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#ifdef _MSC_VER
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"MSVC project file "
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#else
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"Makefile "
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#endif
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"to select another target (e.g. sse2)\n***\n");
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exit(1);
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}
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}
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int main() {
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ensureTargetISAIsSupported();
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float vin[16], vout[16];
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// Initialize input buffer
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for (int i = 0; i < 16; ++i)
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vin[i] = (float)i;
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// Call simple() function from simple.ispc file
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simple(vin, vout, 16);
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// Print results
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for (int i = 0; i < 16; ++i)
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printf("%d: simple(%f) = %f\n", i, vin[i], vout[i]);
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return 0;
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}
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