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

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Jacob Young 2022-12-05 04:29:48 -05:00 committed by Andrew Kelley
parent 9f4ef4de23
commit fad2142ecf
1 changed files with 2 additions and 2 deletions
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4
lib/zig.h
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@ -810,7 +810,7 @@ static inline void zig_vmulo_i16(zig_u8 *ov, zig_i16 *res, int n,
\
static inline bool zig_shlo_u##w(zig_u##w *res, zig_u##w lhs, zig_u8 rhs, zig_u8 bits) { \
*res = zig_shlw_u##w(lhs, rhs, bits); \
return (lhs & zig_maxInt_u##w << (bits - rhs)) != zig_as_u##w(0); \
return lhs > zig_maxInt_u##w >> rhs; \
} \
\
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) {
static inline bool zig_shlo_u128(zig_u128 *res, zig_u128 lhs, zig_u8 rhs, zig_u8 bits) {
*res = zig_shlw_u128(lhs, rhs, bits);
return zig_and_u128(lhs, zig_shl_u128(zig_maxInt_u128, bits - rhs)) != zig_as_u128(0, 0);
return zig_cmp_u128(lhs, zig_shr_u128(zig_maxInt_u128, rhs)) > zig_as_i32(0);
}
static inline bool zig_shlo_i128(zig_i128 *res, zig_i128 lhs, zig_u8 rhs, zig_u8 bits) {