benchmarks/vvadd/vvadd_main.c

   1 //**************************************************************************
   2 // Vector-vector add benchmark
   3 //--------------------------------------------------------------------------
   4 //
   5 // This benchmark uses adds to vectors and writes the results to a
   6 // third vector. The input data (and reference data) should be
   7 // generated using the vvadd_gendata.pl perl script and dumped
   8 // to a file named dataset1.h The smips-gcc toolchain does not
   9 // support system calls so printf's can only be used on a host system,
  10 // not on the smips processor simulator itself. You should not change
  11 // anything except the HOST_DEBUG and PREALLOCATE macros for your timing
  12 // runs.
  13
  14 //--------------------------------------------------------------------------
  15 // Macros
  16
  17 // Set HOST_DEBUG to 1 if you are going to compile this for a host
  18 // machine (ie Athena/Linux) for debug purposes and set HOST_DEBUG
  19 // to 0 if you are compiling with the smips-gcc toolchain.
  20
  21 #ifndef HOST_DEBUG
  22 #define HOST_DEBUG 0
  23 #endif
  24
  25 // Set PREALLOCATE to 1 if you want to preallocate the benchmark
  26 // function before starting stats. If you have instruction/data
  27 // caches and you don't want to count the overhead of misses, then
  28 // you will need to use preallocation.
  29
  30 #ifndef PREALLOCATE
  31 #define PREALLOCATE 0
  32 #endif
  33
  34 // Set SET_STATS to 1 if you want to carve out the piece that actually
  35 // does the computation.
  36
  37 #ifndef SET_STATS
  38 #define SET_STATS 0
  39 #endif
  40
  41 //--------------------------------------------------------------------------
  42 // Input/Reference Data
  43
  44 #include "dataset1.h"
  45
  46 //--------------------------------------------------------------------------
  47 // Helper functions
  48
  49 int verify( int n, int test[], int correct[] )
  50 {
  51   int i;
  52   for ( i = 0; i < n; i++ ) {
  53     if ( test[i] != correct[i] ) {
  54       return 2;
  55     }
  56   }
  57   return 1;
  58 }
  59
  60 #if HOST_DEBUG
  61 void printArray( char name[], int n, int arr[] )
  62 {
  63   int i;
  64   printf( " %10s :", name );
  65   for ( i = 0; i < n; i++ )
  66     printf( " %3d ", arr[i] );
  67   printf( "\n" );
  68 }
  69 #endif
  70
  71 void finishTest( int toHostValue )
  72 {
  73 #if HOST_DEBUG
  74   if ( toHostValue == 1 )
  75     printf( "*** PASSED ***\n" );
  76   else
  77     printf( "*** FAILED *** (tohost = %d)\n", toHostValue );
  78   exit(0);
  79 #else
  80   asm( "mtpcr %0, tohost" : : "r" (toHostValue) );
  81   while ( 1 ) { }
  82 #endif
  83 }
  84
  85 void setStats( int enable )
  86 {
  87 #if ( !HOST_DEBUG && SET_STATS )
  88   asm( "mtpcr %0, cr10" : : "r" (enable) );
  89 #endif
  90 }
  91
  92 //--------------------------------------------------------------------------
  93 // vvadd function
  94
  95 void vvadd( int n, int a[], int b[], int c[] )
  96 {
  97   int i;
  98   for ( i = 0; i < n; i++ )
  99     c[i] = a[i] + b[i];
 100 }
 101
 102 //--------------------------------------------------------------------------
 103 // Main
 104
 105 int main( int argc, char* argv[] )
 106 {
 107   int results_data[DATA_SIZE];
 108
 109   // Output the input array
 110
 111 #if HOST_DEBUG
 112   printArray( "input1", DATA_SIZE, input1_data );
 113   printArray( "input2", DATA_SIZE, input2_data );
 114   printArray( "verify", DATA_SIZE, verify_data );
 115 #endif
 116
 117   // If needed we preallocate everything in the caches
 118
 119 #if PREALLOCATE
 120   vvadd( DATA_SIZE, input1_data, input2_data, results_data );
 121 #endif
 122
 123   // Do the vvadd
 124
 125   setStats(1);
 126   vvadd( DATA_SIZE, input1_data, input2_data, results_data );
 127   setStats(0);
 128
 129   // Print out the results
 130
 131 #if HOST_DEBUG
 132   printArray( "results", DATA_SIZE, results_data );
 133 #endif
 134
 135   // Check the results
 136
 137   finishTest(verify( DATA_SIZE, results_data, verify_data ));
 138
 139 }