Changes in libcfa/src/stdlib.cfa [5d1ebb9:1959528]

File:

• libcfa/src/stdlib.cfa (modified) (2 diffs)

libcfa/src/stdlib.cfa

@@ -10 +10 @@
 // Created On       : Thu Jan 28 17:10:29 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Thu Jan 13 21:38:30 2022
-// Update Count     : 593
+// Last Modified On : Wed Jan 12 16:25:36 2022
+// Update Count     : 578
 //
 
 #include "stdlib.hfa"
-#include "bits/random.hfa"
+//#include "concurrency/kernel/fwd.hfa"
 #include "concurrency/invoke.h"                                                 // random_state
 
@@ -223 +223 @@
 //---------------------------------------
 
+// Pipelined to allow OoO overlap with reduced dependencies. Critically, return the current value, and compute and store
+// the next value.
+
 #define GENERATOR LCG
 
-uint32_t __global_random_seed;                                                  // sequential/concurrent
-uint32_t __global_random_state;                                         // sequential only
+static inline uint32_t MarsagliaXor( uint32_t & state ) {
+        uint32_t ret = state;
+        state ^= state << 6;
+        state ^= state >> 21;
+        state ^= state << 7;
+        return ret;
+} // MarsagliaXor
+
+static inline uint32_t LCG( uint32_t & state ) {                // linear congruential generator
+        uint32_t ret = state;
+        state = 36969 * (state & 65535) + (state >> 16);        // 36969 is NOT prime! No not change it!
+        return ret;
+} // LCG
+
+uint32_t __global_random_seed;
 
 void set_seed( PRNG & prng, uint32_t seed_ ) with( prng ) { state = seed = seed_; GENERATOR( state ); } // set seed
 uint32_t prng( PRNG & prng ) with( prng ) { callcnt += 1; return GENERATOR( state ); }
 
-void set_seed( uint32_t seed ) { __global_random_seed = seed; GENERATOR( __global_random_state ); }
+void set_seed( uint32_t seed ) {
+        active_thread()->random_state = __global_random_seed = seed;
+        GENERATOR( active_thread()->random_state );
+} // set_seed
 uint32_t get_seed() { return __global_random_seed; }
-uint32_t prng( void ) { return GENERATOR( __global_random_state ); } // [0,UINT_MAX]
+uint32_t prng( void ) { return GENERATOR( active_thread()->random_state ); } // [0,UINT_MAX]
 
 //---------------------------------------