Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
82 lines
1.5 KiB
C
82 lines
1.5 KiB
C
#ifdef USER_MODE
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#include <time.h>
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#include <stdlib.h>
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#else
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#include <asm/io.h>
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#include <asm/rtai.h>
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#endif
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#ifdef RTAI_ENABLED
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#include <rtai.h>
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#include <rtai_sched.h>
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#define time(x) (unsigned int)(rt_get_time_ns())
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#endif
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unsigned int s0, s1, s2, b;
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//----------------------------------------------
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//
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/*!
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*/
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//
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inline unsigned int taus(void) {
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b = (((s0 << 13) ^ s0) >> 19);
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s0 = (((s0 & 0xFFFFFFFE) << 12)^ b);
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b = (((s1 << 2) ^ s1) >> 25);
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s1 = (((s1 & 0xFFFFFFF8) << 4)^ b);
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b = (((s2 << 3) ^ s2) >> 11);
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s2 = (((s2 & 0xFFFFFFF0) << 17)^ b);
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return s0 ^ s1 ^ s2;
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}
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void set_taus_seed(unsigned int seed_init) {
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#ifdef USER_MODE
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struct drand48_data buffer;
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unsigned long result = 0;
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#endif
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if (seed_init == 0) {
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s0 = (unsigned int)time(NULL);
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s1 = (unsigned int)time(NULL);
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s2 = (unsigned int)time(NULL);
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}
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else {
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#ifndef USER_MODE
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s0 = (unsigned int)0x1e23d852;
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s1 = (unsigned int)0x81f38a1c;
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s2 = (unsigned int)0xfe1a133e;
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#else
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/* Use reentrant version of rand48 to ensure that no conflicts with other generators occur */
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srand48_r((long int)seed_init, &buffer);
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mrand48_r(&buffer, (long int *)&result);
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s0 = result;
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mrand48_r(&buffer, (long int *)&result);
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s1 = result;
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mrand48_r(&buffer, (long int *)&result);
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s2 = result;
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#endif
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}
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}
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#ifdef MAIN
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main() {
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unsigned int i,rand;
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set_taus_seed();
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for (i=0;i<10;i++){
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rand = taus();
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printf("%u\n",rand);
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}
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}
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#endif //MAIN
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