79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
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/*
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* Copyright 2010-2018 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bx#license-bsd-2-clause
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*/
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#include <bx/math.h>
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#include <bx/timer.h>
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#include <bx/file.h>
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#include <math.h>
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typedef float (*MathFn)(float);
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template<MathFn mfn>
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float mathTest(const char* _name)
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{
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bx::WriterI* writer = bx::getStdOut();
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int64_t elapsed = -bx::getHPCounter();
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float result = 0.0f;
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const float max = 1389.0f;
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for (float xx = 0.0f; xx < max; xx += 0.1f)
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{
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result += mfn(xx);
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}
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elapsed += bx::getHPCounter();
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bx::writePrintf(writer, "%-20s: %15f\n", _name, double(elapsed) );
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return result;
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}
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float rsqrt(float _a)
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{
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return 1.0f/::sqrtf(_a);
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}
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void math_bench()
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{
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bx::WriterI* writer = bx::getStdOut();
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bx::writePrintf(writer, "Math bench\n\n");
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mathTest< ::sqrtf >(" ::sqrtf");
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mathTest<bx::sqrtRef >("bx::sqrtRef");
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mathTest<bx::sqrtSimd >("bx::sqrtSimd");
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mathTest<bx::sqrt >("bx::sqrt");
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bx::writePrintf(writer, "\n");
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mathTest< ::rsqrt >(" ::rsqrtf");
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mathTest<bx::rsqrtRef >("bx::rsqrtRef");
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mathTest<bx::rsqrtSimd>("bx::rsqrtSimd");
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mathTest<bx::rsqrt >("bx::rsqrt");
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bx::writePrintf(writer, "\n");
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mathTest< ::sinf >(" ::sinf");
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mathTest<bx::sin >("bx::sin");
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bx::writePrintf(writer, "\n");
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mathTest< ::asinf>(" ::asinf");
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mathTest<bx::asin >("bx::asin");
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bx::writePrintf(writer, "\n");
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mathTest< ::cosf >(" ::cosf");
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mathTest<bx::cos >("bx::cos");
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bx::writePrintf(writer, "\n");
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mathTest< ::acosf>(" ::acosf");
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mathTest<bx::acos >("bx::acos");
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bx::writePrintf(writer, "\n");
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mathTest< ::tanf >(" ::tanf");
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mathTest<bx::tan >("bx::tan");
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bx::writePrintf(writer, "\n");
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mathTest< ::atanf>(" ::atanf");
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mathTest<bx::atan >("bx::atan");
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}
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