diff options
| author |  Jason Gross <jgross@mit.edu> | 2016-10-27 19:13:36 -0400 |
|---|---|---|
| committer | Jason Gross <jgross@mit.edu> | 2016-10-27 19:13:36 -0400 |
| commit | cf7c7901d5c9ab3623537087cd98e204d703ac27 (patch) | |
| tree | 6b9bf0312c84ee1a042a9de9f1ffc887e922d16c /src/Util/WordUtil.v | |
| parent | 00965588b4e14e34cd0f864fb32a780ad8bae89d (diff) | |
Add beginnings of various interpretations of expression trees
Diffstat (limited to 'src/Util/WordUtil.v')
| -rw-r--r-- | src/Util/WordUtil.v | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/Util/WordUtil.v b/src/Util/WordUtil.v index 2a3c48fcf..de5cd0847 100644 --- a/src/Util/WordUtil.v +++ b/src/Util/WordUtil.v @@ -10,6 +10,11 @@ Require Import Coq.micromega.Psatz. Local Open Scope nat_scope. +Create HintDb pull_wordToN discriminated. +Create HintDb push_wordToN discriminated. +Hint Extern 1 => autorewrite with pull_wordToN in * : pull_wordToN. +Hint Extern 1 => autorewrite with push_wordToN in * : push_wordToN. + Lemma pow2_id : forall n, pow2 n = 2 ^ n. Proof. induction n; intros; simpl; auto. @@ -42,6 +47,8 @@ Proof. apply natToWord_wordToNat. Qed. +Hint Rewrite NToWord_wordToN : pull_wordToN. + Lemma bound_check_nat_N : forall x n, (Z.to_nat x < 2 ^ n)%nat -> (Z.to_N x < Npow2 n)%N. Proof. intros x n bound_nat. @@ -92,6 +99,7 @@ Proof. destruct pf; rewrite cast_word_refl; trivial. Qed. Lemma wordToN_cast_word {n} (w:word n) m pf : wordToN (@cast_word n m pf w) = wordToN w. Proof. destruct pf; rewrite cast_word_refl; trivial. Qed. +Hint Rewrite @wordToN_cast_word : push_wordToN. Import NPeano Nat. Local Infix "++" := combine. |