1 /* Test dot-product function */ 2 3 #include <stdio.h> 4 #include <stdlib.h> 5 #include <memory.h> 6 #include <math.h> 7 #include "config.h" 8 #ifdef HAVE_GETOPT_H 9 #include <getopt.h> 10 #endif 11 #include "fec.h" 12 13 #if HAVE_GETOPT_LONG 14 struct option Options[] = { 15 {"force-altivec",0,NULL,'a'}, 16 {"force-port",0,NULL,'p'}, 17 {"force-mmx",0,NULL,'m'}, 18 {"force-sse",0,NULL,'s'}, 19 {"force-sse2",0,NULL,'t'}, 20 {"trials",0,NULL,'n'}, 21 {NULL}, 22 }; 23 #endif 24 25 int main(int argc,char *argv[]){ 26 short coeffs[512]; 27 short input[2048]; 28 int trials=1000,d; 29 int errors = 0; 30 31 #if HAVE_GETOPT_LONG 32 while((d = getopt_long(argc,argv,"apmstn:",Options,NULL)) != EOF){ 33 #else 34 while((d = getopt(argc,argv,"apmstn:")) != EOF){ 35 #endif 36 switch(d){ 37 case 'a': 38 Cpu_mode = ALTIVEC; 39 break; 40 case 'p': 41 Cpu_mode = PORT; 42 break; 43 case 'm': 44 Cpu_mode = MMX; 45 break; 46 case 's': 47 Cpu_mode = SSE; 48 break; 49 case 't': 50 Cpu_mode = SSE2; 51 break; 52 case 'n': 53 trials = atoi(optarg); 54 break; 55 } 56 } 57 58 while(trials--){ 59 long port_result; 60 long simd_result; 61 int ntaps; 62 int i; 63 int csum = 0; 64 int offset; 65 void *dp_simd,*dp_port; 66 67 /* Generate set of coefficients 68 * limit sum of absolute values to 32767 to avoid overflow 69 */ 70 memset(coeffs,0,sizeof(coeffs)); 71 for(i=0;i<512;i++){ 72 double gv; 73 74 gv = normal_rand(0.,100.); 75 if(csum + fabs(gv) > 32767) 76 break; 77 coeffs[i] = gv; 78 csum += fabs(gv); 79 } 80 ntaps = i; 81 82 /* Compare results to portable C version for a bunch of random data buffers and offsets */ 83 dp_simd = initdp(coeffs,ntaps); 84 dp_port = initdp_port(coeffs,ntaps); 85 86 for(i=0;i<2048;i++) 87 input[i] = random(); 88 89 offset = random() & 511; 90 91 simd_result = dotprod(dp_simd,input+offset); 92 port_result = dotprod_port(dp_port,input+offset); 93 if(simd_result != port_result){ 94 errors++; 95 } 96 } 97 printf("dtest: %d errors\n",errors); 98 exit(0); 99 } 100
