Changeset aa8e24c3 for libcfa/src/stdlib.cfa
- Timestamp:
- Dec 29, 2021, 5:06:07 PM (3 years ago)
- Branches:
- ADT, ast-experimental, enum, forall-pointer-decay, master, pthread-emulation, qualifiedEnum
- Children:
- aa0a1ad, db1ebed
- Parents:
- 7a6ae53
- git-author:
- Peter A. Buhr <pabuhr@…> (12/29/21 17:00:15)
- git-committer:
- Peter A. Buhr <pabuhr@…> (12/29/21 17:06:07)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
libcfa/src/stdlib.cfa
r7a6ae53 raa8e24c3 10 10 // Created On : Thu Jan 28 17:10:29 2016 11 11 // Last Modified By : Peter A. Buhr 12 // Last Modified On : Thu Nov 12 07:46:09 202013 // Update Count : 5 0312 // Last Modified On : Wed Dec 29 15:32:44 2021 13 // Update Count : 512 14 14 // 15 15 … … 221 221 //--------------------------------------- 222 222 223 bool threading_enabled(void) __attribute__((weak)) { 224 return false; 225 } 223 static uint32_t seed = 0; // current seed 224 static thread_local uint32_t state; // random state 225 226 void set_seed( uint32_t seed_ ) { state = seed = seed_; } 227 uint32_t get_seed() { return seed; } 228 229 #define GENERATOR LCG 230 231 inline uint32_t MarsagliaXor( uint32_t & state ) { 232 if ( unlikely( seed == 0 ) ) set_seed( rdtscl() ); 233 else if ( unlikely( state == 0 ) ) state = seed; 234 state ^= state << 6; 235 state ^= state >> 21; 236 state ^= state << 7; 237 return state; 238 } // MarsagliaXor 239 240 inline uint32_t LCG( uint32_t & state ) { // linear congruential generator 241 if ( unlikely( seed == 0 ) ) set_seed( rdtscl() ); 242 else if ( unlikely( state == 0 ) ) state = seed; 243 return state = 36973 * (state & 65535) + (state >> 16); 244 } // LCG 245 246 uint32_t prng( PRNG & prng ) with( prng ) { callcnt += 1; return GENERATOR( state ); } 247 248 uint32_t prng( void ) { return GENERATOR( state ); } 249 250 //--------------------------------------- 251 252 bool threading_enabled( void ) __attribute__(( weak )) { return false; } 226 253 227 254 // Local Variables: //
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