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Diffstat (limited to 'benchmarks/CUDA/BlackScholes/BlackScholes_gold.cpp')
| -rw-r--r-- | benchmarks/CUDA/BlackScholes/BlackScholes_gold.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/benchmarks/CUDA/BlackScholes/BlackScholes_gold.cpp b/benchmarks/CUDA/BlackScholes/BlackScholes_gold.cpp new file mode 100644 index 0000000..2405fea --- /dev/null +++ b/benchmarks/CUDA/BlackScholes/BlackScholes_gold.cpp @@ -0,0 +1,117 @@ +/* + * Copyright 1993-2007 NVIDIA Corporation. All rights reserved. + * + * NOTICE TO USER: + * + * This source code is subject to NVIDIA ownership rights under U.S. and + * international Copyright laws. Users and possessors of this source code + * are hereby granted a nonexclusive, royalty-free license to use this code + * in individual and commercial software. + * + * NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THIS SOURCE + * CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR + * IMPLIED WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOURCE CODE, INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE. + * IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, + * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS + * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE + * OR PERFORMANCE OF THIS SOURCE CODE. + * + * U.S. Government End Users. This source code is a "commercial item" as + * that term is defined at 48 C.F.R. 2.101 (OCT 1995), consisting of + * "commercial computer software" and "commercial computer software + * documentation" as such terms are used in 48 C.F.R. 12.212 (SEPT 1995) + * and is provided to the U.S. Government only as a commercial end item. + * Consistent with 48 C.F.R.12.212 and 48 C.F.R. 227.7202-1 through + * 227.7202-4 (JUNE 1995), all U.S. Government End Users acquire the + * source code with only those rights set forth herein. + * + * Any use of this source code in individual and commercial software must + * include, in the user documentation and internal comments to the code, + * the above Disclaimer and U.S. Government End Users Notice. + */ + + + +#include <math.h> + + + +/////////////////////////////////////////////////////////////////////////////// +// Polynomial approximation of cumulative normal distribution function +/////////////////////////////////////////////////////////////////////////////// +static double CND(double d){ + const double A1 = 0.31938153; + const double A2 = -0.356563782; + const double A3 = 1.781477937; + const double A4 = -1.821255978; + const double A5 = 1.330274429; + const double RSQRT2PI = 0.39894228040143267793994605993438; + + double + K = 1.0 / (1.0 + 0.2316419 * fabs(d)); + + double + cnd = RSQRT2PI * exp(- 0.5 * d * d) * + (K * (A1 + K * (A2 + K * (A3 + K * (A4 + K * A5))))); + + if(d > 0) + cnd = 1.0 - cnd; + + return cnd; +} + + +/////////////////////////////////////////////////////////////////////////////// +// Black-Scholes formula for both call and put +/////////////////////////////////////////////////////////////////////////////// +static void BlackScholesBodyCPU( + float& callResult, + float& putResult, + float Sf, //Stock price + float Xf, //Option strike + float Tf, //Option years + float Rf, //Riskless rate + float Vf //Volatility rate +){ + double S = Sf, X = Xf, T = Tf, R = Rf, V = Vf; + + double sqrtT = sqrt(T); + double d1 = (log(S / X) + (R + 0.5 * V * V) * T) / (V * sqrtT); + double d2 = d1 - V * sqrtT; + double CNDD1 = CND(d1); + double CNDD2 = CND(d2); + + //Calculate Call and Put simultaneously + double expRT = exp(- R * T); + callResult = (float)(S * CNDD1 - X * expRT * CNDD2); + putResult = (float)(X * expRT * (1.0 - CNDD2) - S * (1.0 - CNDD1)); +} + + +//////////////////////////////////////////////////////////////////////////////// +// Process an array of optN options +//////////////////////////////////////////////////////////////////////////////// +extern "C" void BlackScholesCPU( + float *h_CallResult, + float *h_PutResult, + float *h_StockPrice, + float *h_OptionStrike, + float *h_OptionYears, + float Riskfree, + float Volatility, + int optN +){ + for(int opt = 0; opt < optN; opt++) + BlackScholesBodyCPU( + h_CallResult[opt], + h_PutResult[opt], + h_StockPrice[opt], + h_OptionStrike[opt], + h_OptionYears[opt], + Riskfree, + Volatility + ); +} |
