Module: Rand

Defined in:
ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb

Constant Summary collapse

BNUM = 
1 << 29
BNUMF = 
BNUM.to_f
@@x =

Use xorshift

123456789
@@y = 
362436069
@@z = 
521288629
@@w = 
88675123

Class Method Summary collapse

Class Method Details

.rand ⇒ Object 



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# File 'ext/enterprise_script_service/mruby/benchmark/bm_ao_render.rb', line 21

def self.rand
  x = @@x
  t = x ^ ((x & 0xfffff) << 11)
  w = @@w
  @@x, @@y, @@z = @@y, @@z, w
  w = @@w = (w ^ (w >> 19) ^ (t ^ (t >> 8)))
  (w % BNUM) / BNUMF
end