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theory TestBv32
use bv.BV32
lemma Test1:
let b = bw_and zeros ones in nth b 1 = False
lemma Test2:
let b = lsr ones 16 in nth b 15 = True
lemma Test3:
let b = lsr ones 16 in nth b 16 = False
lemma Test4:
let b = asr ones 16 in nth b 15 = True
lemma Test5:
let b = asr ones 16 in nth b 16 = True
lemma Test6:
let b = asr (lsr ones 1) 16 in nth b 16 = False
end
theory NthConvert
use mach.int.Int
use bv.BV8 as BV8
use bv.BV64 as BV64
use bv.BVConverter_8_64 as BVC
lemma bv8_to_bv64_low:
forall x i. 0 <= i < 8 -> BV64.nth (BVC.toBig x) i = BV8.nth x i
by forall i.
BV64.nth_bv (BVC.toBig x) (BVC.toBig i) = BV8.nth_bv x i
lemma bv8_to_bv64_high:
forall x i. 8 <= i < 64 -> BV64.nth (BVC.toBig x) i = false
end
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