benchmarks/median/median_main.c

   1 //**************************************************************************
   2 // Median filter bencmark
   3 //--------------------------------------------------------------------------
   4 //
   5 // This benchmark performs a 1D three element median filter. The
   6 // input data (and reference data) should be generated using the
   7 // median_gendata.pl perl script and dumped to a file named
   8 // dataset1.h You should not change anything except the
   9 // HOST_DEBUG and PREALLOCATE macros for your timing run.
  10
  11 #include "median.h"
  12
  13 //--------------------------------------------------------------------------
  14 // Macros
  15
  16 // Set HOST_DEBUG to 1 if you are going to compile this for a host
  17 // machine (ie Athena/Linux) for debug purposes and set HOST_DEBUG
  18 // to 0 if you are compiling with the smips-gcc toolchain.
  19
  20 #ifndef HOST_DEBUG
  21 #define HOST_DEBUG 0
  22 #endif
  23
  24 // Set PREALLOCATE to 1 if you want to preallocate the benchmark
  25 // function before starting stats. If you have instruction/data
  26 // caches and you don't want to count the overhead of misses, then
  27 // you will need to use preallocation.
  28
  29 #ifndef PREALLOCATE
  30 #define PREALLOCATE 0
  31 #endif
  32
  33 // Set SET_STATS to 1 if you want to carve out the piece that actually
  34 // does the computation.
  35
  36 #ifndef SET_STATS
  37 #define SET_STATS 0
  38 #endif
  39
  40 //--------------------------------------------------------------------------
  41 // Input/Reference Data
  42
  43 #include "dataset1.h"
  44
  45 //--------------------------------------------------------------------------
  46 // Helper functions
  47
  48 int verify( int n, int test[], int correct[] )
  49 {
  50   int i;
  51   for ( i = 0; i < n; i++ ) {
  52     if ( test[i] != correct[i] ) {
  53       return 2;
  54     }
  55   }
  56   return 1;
  57 }
  58
  59 #if HOST_DEBUG
  60 void printArray( char name[], int n, int arr[] )
  61 {
  62   int i;
  63   printf( " %10s :", name );
  64   for ( i = 0; i < n; i++ )
  65     printf( " %3d ", arr[i] );
  66   printf( "\n" );
  67 }
  68 #endif
  69
  70 void finishTest( int toHostValue )
  71 {
  72 #if HOST_DEBUG
  73   if ( toHostValue == 1 )
  74     printf( "*** PASSED ***\n" );
  75   else
  76     printf( "*** FAILED *** (tohost = %d)\n", toHostValue );
  77   exit(0);
  78 #else
  79   asm( "mtpcr %0, tohost" : : "r" (toHostValue) );
  80   while ( 1 ) { }
  81 #endif
  82 }
  83
  84 void setStats( int enable )
  85 {
  86 #if ( !HOST_DEBUG && SET_STATS )
  87   asm( "mtpcr %0, cr10" : : "r" (enable) );
  88 #endif
  89 }
  90
  91 //--------------------------------------------------------------------------
  92 // Main
  93
  94 int main( int argc, char* argv[] )
  95 {
  96   int results_data[DATA_SIZE];
  97
  98   // Output the input array
  99
 100 #if HOST_DEBUG
 101   printArray( "input",  DATA_SIZE, input_data  );
 102   printArray( "verify", DATA_SIZE, verify_data );
 103 #endif
 104
 105   // If needed we preallocate everything in the caches
 106
 107 #if ( !HOST_DEBUG && PREALLOCATE )
 108   median( DATA_SIZE, input_data, results_data );
 109 #endif
 110
 111   // Do the filter
 112
 113 #if HOST_DEBUG
 114   median( DATA_SIZE, input_data, results_data );
 115 #else
 116   setStats(1);
 117   median( DATA_SIZE, input_data, results_data );
 118   setStats(0);
 119 #endif
 120
 121   // Print out the results
 122
 123 #if HOST_DEBUG
 124   printArray( "results", DATA_SIZE, results_data );
 125 #endif
 126
 127   // Check the results
 128
 129   finishTest(verify( DATA_SIZE, results_data, verify_data ));
 130
 131 }