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Add tests and fixes for modpow2, muldivmod

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OmicronTau 2021-12-05 17:41:22 +03:00 • committed by EmelyanenkoK
parent cb31a20206
commit 703bcd6e32
10 changed files with 2017 additions and 54 deletions
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26
crypto/vm/arithops.cpp
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@ -387,18 +387,16 @@ int exec_muldivmod(VmState* st, unsigned args, int quiet) {
auto z = stack.pop_int();
auto y = stack.pop_int();
auto x = stack.pop_int();
typename td::BigInt256::DoubleInt tmp{0};
typename td::BigInt256::DoubleInt tmp{0}, quot;
tmp.add_mul(*x, *y);
auto q = td::make_refint();
tmp.mod_div(*z, q.unique_write(), round_mode);
tmp.mod_div(*z, quot, round_mode);
switch ((args >> 2) & 3) {
case 1:
q.unique_write().normalize();
stack.push_int_quiet(std::move(q), quiet);
stack.push_int_quiet(td::make_refint(quot.normalize()), quiet);
break;
case 3:
q.unique_write().normalize();
stack.push_int_quiet(std::move(q), quiet);
stack.push_int_quiet(td::make_refint(quot.normalize()), quiet);
// fallthrough
case 2:
stack.push_int_quiet(td::make_refint(tmp), quiet);
@ -459,7 +457,7 @@ int exec_mulshrmod(VmState* st, unsigned args, int mode) {
}
// fallthrough
case 2:
tmp.mod_pow2(z, round_mode).normalize();
tmp.normalize().mod_pow2(z, round_mode).normalize();
stack.push_int_quiet(td::make_refint(tmp), mode & 1);
break;
}
@ -520,21 +518,17 @@ int exec_shldivmod(VmState* st, unsigned args, int mode) {
}
auto z = stack.pop_int();
auto x = stack.pop_int();
typename td::BigInt256::DoubleInt tmp{*x};
typename td::BigInt256::DoubleInt tmp{*x}, quot;
tmp <<= y;
switch ((args >> 2) & 3) {
case 1: {
auto q = td::make_refint();
tmp.mod_div(*z, q.unique_write(), round_mode);
q.unique_write().normalize();
stack.push_int_quiet(std::move(q), mode & 1);
tmp.mod_div(*z, quot, round_mode);
stack.push_int_quiet(td::make_refint(quot.normalize()), mode & 1);
break;
}
case 3: {
auto q = td::make_refint();
tmp.mod_div(*z, q.unique_write(), round_mode);
q.unique_write().normalize();
stack.push_int_quiet(std::move(q), mode & 1);
tmp.mod_div(*z, quot, round_mode);
stack.push_int_quiet(td::make_refint(quot.normalize()), mode & 1);
stack.push_int_quiet(td::make_refint(tmp), mode & 1);
break;
}