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[FunC] Fix a bug with << operator to zero value

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This commit is contained in:
Aleksandr Kirsanov 2024-06-13 12:24:08 +02:00
parent 49a0d32c1b
commit 3520184553
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GPG key ID: B758BBAA01FFB3D3
2 changed files with 55 additions and 2 deletions
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53
crypto/func/auto-tests/tests/bit-operators.fc Normal file
View file

@ -0,0 +1,53 @@
int lshift() {
return (1 << 0) == 1;
}
int rshift() {
return (1 >> 0) == 1;
}
int lshift_var(int i) {
return (1 << i) == 1;
}
int rshift_var(int i) {
return (1 >> i) == 1;
}
int main(int x) {
if (x == 0) {
return lshift();
} elseif (x == 1) {
return rshift();
} elseif (x == 2) {
return lshift_var(0);
} elseif (x == 3) {
return rshift_var(0);
} elseif (x == 4) {
return lshift_var(1);
} else {
return rshift_var(1);
}
}
int is_claimed(int index) method_id(11) {
int claim_bit_index = index % 256;
int mask = 1 << claim_bit_index;
return (255 & mask) == mask;
}
{-
method_id | in | out
TESTCASE | 0 | 0 | -1
TESTCASE | 0 | 1 | -1
TESTCASE | 0 | 2 | -1
TESTCASE | 0 | 3 | -1
TESTCASE | 0 | 4 | 0
TESTCASE | 0 | 5 | 0
TESTCASE | 11 | 0 | -1
TESTCASE | 11 | 1 | -1
TESTCASE | 11 | 256 | -1
TESTCASE | 11 | 8 | 0
-}

4
crypto/func/builtins.cpp
View file

@ -274,7 +274,7 @@ int emulate_lshift(int a, int b) {
}
int t = ((b & VarDescr::_NonZero) ? VarDescr::_Even : 0);
t |= b & VarDescr::_Finite;
return emulate_mul(a, VarDescr::_Int | VarDescr::_Pos | VarDescr::_NonZero | VarDescr::_Even | t);
return emulate_mul(a, VarDescr::_Int | VarDescr::_Pos | VarDescr::_NonZero | t);
}
int emulate_div(int a, int b) {
@ -320,7 +320,7 @@ int emulate_rshift(int a, int b) {
}
int t = ((b & VarDescr::_NonZero) ? VarDescr::_Even : 0);
t |= b & VarDescr::_Finite;
return emulate_div(a, VarDescr::_Int | VarDescr::_Pos | VarDescr::_NonZero | VarDescr::_Even | t);
return emulate_div(a, VarDescr::_Int | VarDescr::_Pos | VarDescr::_NonZero | t);
}
int emulate_mod(int a, int b, int round_mode = -1) {