diff options
Diffstat (limited to 'base/random.cc')
-rw-r--r-- | base/random.cc | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/base/random.cc b/base/random.cc index a6d9da6c1..babe93db5 100644 --- a/base/random.cc +++ b/base/random.cc @@ -31,6 +31,7 @@ #include "sim/param.hh" #include "base/random.hh" +#include "base/trace.hh" using namespace std; @@ -52,15 +53,33 @@ seed(¶mContext, "seed", "seed to random number generator", 1); void RandomContext::checkParams() { - ::srandom(seed); + ::srand48(seed); } long getLong() { - return random(); + return mrand48(); } +int64_t +getUniform(int64_t maxmin) +{ + double r; + r = (drand48() - 0.500) * 2 * maxmin; + DPRINTFN("getUniform %f\n", r); + return (int64_t)round(r); +} + +uint64_t +getUniformPos(uint64_t max) +{ + double r; + r = drand48() * 2 * max; + return (uint64_t)round(r); +} + + // idea for generating a double from erand48 double getDouble() @@ -70,8 +89,8 @@ getDouble() uint16_t _short[4]; }; - _long[0] = random(); - _long[1] = random(); + _long[0] = mrand48(); + _long[1] = mrand48(); return ldexp((double) _short[0], -48) + ldexp((double) _short[1], -32) + |