def wsd.sd2b

bend-osdev-word64@0.1.1.0 · PROOF_text.bend:323

import bend-osdev-word64@0.1.1.0/PROOF_text.bend as PROOFText
import Base
import bend-osdev-u32@0.1.0.0/u32.bend as U
import bend-osdev-u32@0.1.0.0/LAWS.bend as UL
import bend-osdev-word64@0.1.1.0/word64.bend as W

323def wsd.sd2b(+hh: U32, +ll: U32, +a1: {U32.to_nat(wsd.q(0, 0, U32.shrn(hh, 16n))) == Nat.add(U.U32Nat.dbl(16n, U32.to_nat(0)), U32.to_nat(wsd.d(0, U32.shrn(hh, 16n)))) : Nat}, +b1: {Nat.add(Nat.mul(U32.to_nat(wsd.d(0, U32.shrn(hh, 16n))), 10n), U32.to_nat(wsd.m(0, U32.shrn(hh, 16n)))) == Nat.add(U.U32Nat.dbl(16n, U32.to_nat(0)), U32.to_nat(U32.shrn(hh, 16n))) : Nat}, +a2: {U32.to_nat(wsd.q(wsd.q(0, 0, U32.shrn(hh, 16n)), wsd.m(0, U32.shrn(hh, 16n)), U32.and(hh, 65535))) == Nat.add(U.U32Nat.dbl(16n, U32.to_nat(wsd.q(0, 0, U32.shrn(hh, 16n)))), U32.to_nat(wsd.d(wsd.m(0, U32.shrn(hh, 16n)), U32.and(hh, 65535)))) : Nat}, +b2: {Nat.add(Nat.mul(U32.to_nat(wsd.d(wsd.m(0, U32.shrn(hh, 16n)), U32.and(hh, 65535))), 10n), U32.to_nat(wsd.m(wsd.m(0, U32.shrn(hh, 16n)), U32.and(hh, 65535)))) == Nat.add(U.U32Nat.dbl(16n, U32.to_nat(wsd.m(0, U32.shrn(hh, 16n)))), U32.to_nat(U32.and(hh, 65535))) : Nat}, +m2: {Nat.is_lt(U32.to_nat(wsd.m(wsd.m(0, U32.shrn(hh, 16n)), U32.and(hh, 65535))), 10n) == True{} : Bool}) -> {Nat.add(Nat.mul(W.W64.to_nat(W.W64.small.q(W.W64.small.divmod(W.W64{hh, ll}, 10))), 10n), U32.to_nat(W.W64.small.r(W.W64.small.divmod(W.W64{hh, ll}, 10)))) == W.W64.to_nat(W.W64{hh, ll}) : Nat} & {Nat.is_lt(U32.to_nat(W.W64.small.r(W.W64.small.divmod(W.W64{hh, ll}, 10))), 10n) == True{} : Bool}:
324  wsd.sd3(hh, ll, a1, a2, b1, b2, wsd.step(wsd.m(wsd.m(0, U32.shrn(hh, 16n)), U32.and(hh, 65535)), 0, U32.shrn(ll, 16n), m2, Equal.trans(Bool, Nat.is_lt(U32.to_nat(U32.shrn(ll, 16n)), U.U32Nat.dbl(16n, 1n)), Nat.is_lt(U.U32Nat.high(16n, U32.to_nat(ll)), U.U32Nat.dbl(16n, 1n)), True{}, Equal.cong(Nat, Bool, zz => Nat.is_lt(zz, U.U32Nat.dbl(16n, 1n)), U32.to_nat(U32.shrn(ll, 16n)), U.U32Nat.high(16n, U32.to_nat(ll)), Equal.sym(Nat, U.U32Nat.high(16n, U32.to_nat(ll)), U32.to_nat(U32.shrn(ll, 16n)), Equal.sym(Nat, U32.to_nat(U32.shrn(ll, 16n)), U.U32Nat.high(16n, U32.to_nat(ll)), UL.u32_shrn_value(ll, 16n)))), UL.high_lt(16n, 16n, 32n, U32.to_nat(ll), {==}, wu.lt(ll))), {==}))

Uses (28)

Used by (1)