Commit 1063bf696ed27d58d0c869f7b1f663a6c68b68c1 | zig | Meg's Mirrors

author	leesongun <12179851+leesongun@users.noreply.github.com> 2021-07-13 16:16:57+09:00
committer	Andrew Kelley <andrew@ziglang.org> 2021-07-21 12:24:53-07:00
log	1063bf696ed27d58d0c869f7b1f663a6c68b68c1
tree	ff6e348f8c51d91a849839966e88564a3add1694
parent	3b8c4f07a4a83a31f9d863dd6410332982be1c1e

Fix bigint_shl (#9305)

2 files changed, 8 insertions(+), 1 deletions(-)

src
- stage1
  - bigint.cpp
test
- behavior
  - eval.zig

src/stage1/bigint.cpp+1-1

...	...	@@ -1352,7 +1352,7 @@ void bigint_shl(BigInt dest, const BigInt op1, const BigInt *op2) {
1352	1352
1353	1353	if (op1->digit_count == 1 && shift_amt < 64) {
1354	1354	dest->data.digit = op1_digits[0] << shift_amt;
1355		if (dest->data.digit > op1_digits[0]) {
	1355	if (dest->data.digit >> shift_amt == op1_digits[0]) {
1356	1356	dest->digit_count = 1;
1357	1357	dest->is_negative = op1->is_negative;
1358	1358	return;

test/behavior/eval.zig+7

...	...	@@ -570,6 +570,13 @@ test "comptime shlWithOverflow" {
570	570	try expect(ct_shifted == rt_shifted);
571	571	}
572	572
	573	test "comptime shl" {
	574	var a: u128 = 3;
	575	var b: u7 = 63;
	576	var c: u128 = 3 << 63;
	577	try expectEqual(a << b, c);
	578	}
	579
573	580	test "runtime 128 bit integer division" {
574	581	var a: u128 = 152313999999999991610955792383;
575	582	var b: u128 = 10000000000000000000;