Class: LFSR::Fast::Size19
- Inherits:
-
LFSR_Base
- Object
- LFSR_Base
- LFSR::Fast::Size19
- Defined in:
- ext/lfsr/lfsr.c
Constant Summary collapse
- MASK =
ULL2NUM(0x7ffffLLU)
Instance Method Summary collapse
Instance Method Details
#next_i ⇒ Object
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# File 'ext/lfsr/lfsr.c', line 211 VALUE rb_lfsr_next_i_19(VALUE self) { unsigned long long reg = NUM2ULL(ROBJECT(self)->as.ary[0]), max = NUM2ULL(ROBJECT(self)->as.ary[1]); label_shift19: reg = (reg >> 1) | ((bit(0)^bit(1)^bit(2)^bit(5)) << 0x12); if (reg > max) goto label_shift19; ROBJECT(self)->as.ary[0] = ULL2NUM(reg); return ULL2NUM(reg - 1); } |