arm_dotproduct_example_f32.c
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00001 /* ---------------------------------------------------------------------- 00002 * Copyright (C) 2011 ARM Limited. All rights reserved. 00003 * 00004 * $Date: 15. December 2011 00005 * $Revision: V2.0.0 00006 * 00007 * Project: Cortex-R4 DSP Library 00008 * Title: arm_dotproduct_example_f32.c 00009 * 00010 * Description: Example code computing dot product of two vectors. 00011 * 00012 * Target Processor: Cortex-R4 00013 * 00014 * Version 2.0.0 2011/12/15 00015 * Final release. 00016 * 00017 * ---------------------------------------------------------------------------- */ 00018 00064 #include <math.h> 00065 #include "arm_math.h" 00066 00067 /* ---------------------------------------------------------------------- 00068 * Defines each of the tests performed 00069 * ------------------------------------------------------------------- */ 00070 #define MAX_BLOCKSIZE 32 00071 #define DELTA (0.000001f) 00072 00073 /* ---------------------------------------------------------------------- 00074 * Test input data for Floating point Dot Product example for 32-blockSize 00075 * Generated by the MATLAB randn() function 00076 * ------------------------------------------------------------------- */ 00077 /* ---------------------------------------------------------------------- 00078 ** Test input data of srcA for blockSize 32 00079 ** ------------------------------------------------------------------- */ 00080 float32_t srcA_buf_f32[MAX_BLOCKSIZE] = 00081 { 00082 -0.4325648115282207, -1.6655843782380970, 0.1253323064748307, 00083 0.2876764203585489, -1.1464713506814637, 1.1909154656429988, 00084 1.1891642016521031, -0.0376332765933176, 0.3272923614086541, 00085 0.1746391428209245, -0.1867085776814394, 0.7257905482933027, 00086 -0.5883165430141887, 2.1831858181971011, -0.1363958830865957, 00087 0.1139313135208096, 1.0667682113591888, 0.0592814605236053, 00088 -0.0956484054836690, -0.8323494636500225, 0.2944108163926404, 00089 -1.3361818579378040, 0.7143245518189522, 1.6235620644462707, 00090 -0.6917757017022868, 0.8579966728282626, 1.2540014216025324, 00091 -1.5937295764474768, -1.4409644319010200, 0.5711476236581780, 00092 -0.3998855777153632, 0.6899973754643451 00093 }; 00094 00095 /* ---------------------------------------------------------------------- 00096 ** Test input data of srcB for blockSize 32 00097 ** ------------------------------------------------------------------- */ 00098 float32_t srcB_buf_f32[MAX_BLOCKSIZE] = 00099 { 00100 1.7491401329284098, 0.1325982188803279, 0.3252281811989881, 00101 -0.7938091410349637, 0.3149236145048914, -0.5272704888029532, 00102 0.9322666565031119, 1.1646643544607362, -2.0456694357357357, 00103 -0.6443728590041911, 1.7410657940825480, 0.4867684246821860, 00104 1.0488288293660140, 1.4885752747099299, 1.2705014969484090, 00105 -1.8561241921210170, 2.1343209047321410, 1.4358467535865909, 00106 -0.9173023332875400, -1.1060770780029008, 0.8105708062681296, 00107 0.6985430696369063, -0.4015827425012831, 1.2687512030669628, 00108 -0.7836083053674872, 0.2132664971465569, 0.7878984786088954, 00109 0.8966819356782295, -0.1869172943544062, 1.0131816724341454, 00110 0.2484350696132857, 0.0596083377937976 00111 }; 00112 00113 /* Reference dot product output */ 00114 float32_t refDotProdOut = 5.9273644806352142; 00115 00116 /* ---------------------------------------------------------------------- 00117 * Declare Global variables 00118 * ------------------------------------------------------------------- */ 00119 float32_t multOutput[MAX_BLOCKSIZE]; /* Intermediate output */ 00120 float32_t testOutput; /* Final ouput */ 00121 00122 arm_status status; /* Status of the example */ 00123 00124 int32_t main(void) 00125 { 00126 uint32_t i; /* Loop counter */ 00127 float32_t diff; /* Difference between reference and test outputs */ 00128 00129 /* Multiplication of two input buffers */ 00130 arm_mult_f32(srcA_buf_f32, srcB_buf_f32, multOutput, MAX_BLOCKSIZE); 00131 00132 /* Accumulate the multiplication output values to 00133 get the dot product of the two inputs */ 00134 for(i=0; i< MAX_BLOCKSIZE; i++) 00135 { 00136 arm_add_f32(&testOutput, &multOutput[i], &testOutput, 1); 00137 } 00138 00139 /* absolute value of difference between ref and test */ 00140 diff = fabsf(refDotProdOut - testOutput); 00141 00142 /* Comparison of dot product value with reference */ 00143 if(diff > DELTA) 00144 { 00145 status = ARM_MATH_TEST_FAILURE; 00146 } 00147 00148 if( status == ARM_MATH_TEST_FAILURE) 00149 { 00150 while(1); 00151 } 00152 } 00153
