authorgravatar for jacobly@ziglang.orgJacob Young <jacobly@ziglang.org> 2022-12-05 04:29:48-05:00
committergravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2022-12-06 12:15:04-07:00
logfad2142ecf2dcfe4b73f1707559dce7e8e9fce50
treec90aa9ac2131c68492cd0e34e0b416f641a2b7ad
parent9f4ef4de23927f724413efa6ef54c2cd08a05976

zig.h: fix shift ub for a shlo by 0

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

lib/zig.h+2-2
...@@ -810,7 +810,7 @@ static inline void zig_vmulo_i16(zig_u8 *ov, zig_i16 *res, int n,...@@ -810,7 +810,7 @@ static inline void zig_vmulo_i16(zig_u8 *ov, zig_i16 *res, int n,
810\810\
811 static inline bool zig_shlo_u##w(zig_u##w *res, zig_u##w lhs, zig_u8 rhs, zig_u8 bits) { \811 static inline bool zig_shlo_u##w(zig_u##w *res, zig_u##w lhs, zig_u8 rhs, zig_u8 bits) { \
812 *res = zig_shlw_u##w(lhs, rhs, bits); \812 *res = zig_shlw_u##w(lhs, rhs, bits); \
813 return (lhs & zig_maxInt_u##w << (bits - rhs)) != zig_as_u##w(0); \813 return lhs > zig_maxInt_u##w >> rhs; \
814 } \814 } \
815\815\
816 static inline bool zig_shlo_i##w(zig_i##w *res, zig_i##w lhs, zig_u8 rhs, zig_u8 bits) { \816 static inline bool zig_shlo_i##w(zig_i##w *res, zig_i##w lhs, zig_u8 rhs, zig_u8 bits) { \
...@@ -1340,7 +1340,7 @@ static inline zig_i128 zig_mulw_i128(zig_i128 lhs, zig_i128 rhs, zig_u8 bits) {...@@ -1340,7 +1340,7 @@ static inline zig_i128 zig_mulw_i128(zig_i128 lhs, zig_i128 rhs, zig_u8 bits) {
13401340
1341static inline bool zig_shlo_u128(zig_u128 *res, zig_u128 lhs, zig_u8 rhs, zig_u8 bits) {1341static inline bool zig_shlo_u128(zig_u128 *res, zig_u128 lhs, zig_u8 rhs, zig_u8 bits) {
1342 *res = zig_shlw_u128(lhs, rhs, bits);1342 *res = zig_shlw_u128(lhs, rhs, bits);
1343 return zig_and_u128(lhs, zig_shl_u128(zig_maxInt_u128, bits - rhs)) != zig_as_u128(0, 0);1343 return zig_cmp_u128(lhs, zig_shr_u128(zig_maxInt_u128, rhs)) > zig_as_i32(0);
1344}1344}
13451345
1346static inline bool zig_shlo_i128(zig_i128 *res, zig_i128 lhs, zig_u8 rhs, zig_u8 bits) {1346static inline bool zig_shlo_i128(zig_i128 *res, zig_i128 lhs, zig_u8 rhs, zig_u8 bits) {