Require Import Coq.ZArith.ZArith. Require Import Crypto.Util.ZUtil.Hints.Core. Require Import Crypto.Util.ZUtil.Modulo.PullPush. Local Open Scope Z_scope. Ltac push_Zmod := repeat match goal with | _ => progress autorewrite with push_Zmod | [ |- context[(?x * ?y) mod ?z] ] => first [ rewrite (Z.mul_mod_push x y z) by Z.NoZMod | rewrite (Z.mul_mod_l_push x y z) by Z.NoZMod | rewrite (Z.mul_mod_r_push x y z) by Z.NoZMod ] | [ |- context[(?x + ?y) mod ?z] ] => first [ rewrite (Z.add_mod_push x y z) by Z.NoZMod | rewrite (Z.add_mod_l_push x y z) by Z.NoZMod | rewrite (Z.add_mod_r_push x y z) by Z.NoZMod ] | [ |- context[(?x - ?y) mod ?z] ] => first [ rewrite (Z.sub_mod_push x y z) by Z.NoZMod | rewrite (Z.sub_mod_l_push x y z) by Z.NoZMod | rewrite (Z.sub_mod_r_push x y z) by Z.NoZMod ] | [ |- context[(-?y) mod ?z] ] => rewrite (Z.opp_mod_mod_push y z) by Z.NoZMod | [ |- context[(?p^?q) mod ?z] ] => rewrite (Z.pow_mod_push p q z) by Z.NoZMod end. Ltac push_Zmod_hyps := repeat match goal with | _ => progress autorewrite with push_Zmod in * |- | [ H : context[(?x * ?y) mod ?z] |- _ ] => first [ rewrite (Z.mul_mod_push x y z) in H by Z.NoZMod | rewrite (Z.mul_mod_l_push x y z) in H by Z.NoZMod | rewrite (Z.mul_mod_r_push x y z) in H by Z.NoZMod ] | [ H : context[(?x + ?y) mod ?z] |- _ ] => first [ rewrite (Z.add_mod_push x y z) in H by Z.NoZMod | rewrite (Z.add_mod_l_push x y z) in H by Z.NoZMod | rewrite (Z.add_mod_r_push x y z) in H by Z.NoZMod ] | [ H : context[(?x - ?y) mod ?z] |- _ ] => first [ rewrite (Z.sub_mod_push x y z) in H by Z.NoZMod | rewrite (Z.sub_mod_l_push x y z) in H by Z.NoZMod | rewrite (Z.sub_mod_r_push x y z) in H by Z.NoZMod ] | [ H : context[(-?y) mod ?z] |- _ ] => rewrite (Z.opp_mod_mod_push y z) in H by Z.NoZMod | [ H : context[(?p^?q) mod ?z] |- _ ] => rewrite (Z.pow_mod_push p q z) in H by Z.NoZMod end. Ltac has_no_mod x z := lazymatch x with | context[_ mod z] => fail | _ => idtac end. Ltac pull_Zmod := repeat match goal with | [ |- context[((?x mod ?z) * (?y mod ?z)) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.mul_mod_full x y z) | [ |- context[((?x mod ?z) * ?y) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.mul_mod_l x y z) | [ |- context[(?x * (?y mod ?z)) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.mul_mod_r x y z) | [ |- context[((?x mod ?z) + (?y mod ?z)) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.add_mod_full x y z) | [ |- context[((?x mod ?z) + ?y) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.add_mod_l x y z) | [ |- context[(?x + (?y mod ?z)) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.add_mod_r x y z) | [ |- context[((?x mod ?z) - (?y mod ?z)) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.sub_mod_full x y z) | [ |- context[((?x mod ?z) - ?y) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.sub_mod_l x y z) | [ |- context[(?x - (?y mod ?z)) mod ?z] ] => has_no_mod x z; has_no_mod y z; rewrite <- (Z.sub_mod_r x y z) | [ |- context[(((-?y) mod ?z)) mod ?z] ] => has_no_mod y z; rewrite <- (Z.opp_mod_mod y z) | [ |- context[((?x mod ?z)^?y) mod ?z] ] => has_no_mod x z; rewrite <- (Z.pow_mod_full x y z) | [ |- context[(?x mod ?z) mod ?z] ] => rewrite (Zmod_mod x z) | _ => progress autorewrite with pull_Zmod end.