4641ed8c96
In LNSym we often use the pattern `ofBool (a.getLsbD i)` to pick out a specific bit (`i`) from a bitvector (`a`). By adding a rewrite to `extractLsb` to `bv_decide`s normalization set, we can still automatically close goals that have this pattern. In the process, I also added a simp-lemma about the value of a `Fin 1`.
27 lines
686 B
Text
27 lines
686 B
Text
import Std.Tactic.BVDecide
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open BitVec
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theorem bv_extract_1 (h : x = 1#64) : extractLsb' 32 32 x = 0#32 := by
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bv_decide
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theorem bv_extract_2 (h : x = 1#64) : extractLsb' 0 32 x = 1#32 := by
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bv_decide
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theorem bv_extract_3 (h : x = 1#64) : extractLsb 63 32 x = 0#32 := by
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bv_decide
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theorem bv_extract_4 (h : x = 1#64) : extractLsb 31 0 x = 1#32 := by
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bv_decide
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theorem bv_ofBool_1 (h : x = 1#64) : ofBool (x.getLsbD 0) = 1#1 := by
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bv_decide
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theorem bv_ofBool_2 (h : x = 1#64) : ofBool (x.getLsbD 1) = 0#1 := by
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bv_decide
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theorem bv_ofBool_3 (h : x = 1#64) : ofBool x[0] = 1#1 := by
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bv_decide
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theorem bv_ofBool_4 (h : x = 1#64) : ofBool x[1] = 0#1 := by
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bv_decide
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