zig

commit fad2142ecf2dcfe4b73f1707559dce7e8e9fce50 (tree)
parent 9f4ef4de23927f724413efa6ef54c2cd08a05976
Author: Jacob Young <jacobly0@users.noreply.github.com>
Date:   Mon,  5 Dec 2022 04:29:48 -0500

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

Diffstat:
M
lib/zig.h
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/zig.h b/lib/zig.h
@@ -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) {