diff --git a/stage1/zig.h b/stage1/zig.h
index 5ac70d2a24..233c2961cb 100644
--- a/stage1/zig.h
+++ b/stage1/zig.h
@@ -946,6 +946,24 @@ typedef unsigned long zig_Builtin64;
 typedef unsigned long long zig_Builtin64;
 #endif
 
+#define zig_builtin8_rev(name, val) __builtin_##name(val)
+
+#define zig_builtin16_rev(name, val) __builtin_##name(val)
+
+#if INT_MIN <= INT32_MIN
+#define zig_builtin32_rev(name, val) __builtin_##name(val)
+#elif LONG_MIN <= INT32_MIN
+#define zig_builtin32_rev(name, val) __builtin_l##name(val)
+#endif
+
+#if INT_MIN <= INT64_MIN
+#define zig_builtin64_rev(name, val) __builtin_##name(val)
+#elif LONG_MIN <= INT64_MIN
+#define zig_builtin64_rev(name, val) __builtin_l##name(val)
+#elif LLONG_MIN <= INT64_MIN
+#define zig_builtin64_rev(name, val) __builtin_ll##name(val)
+#endif
+
 static inline uint8_t zig_byte_swap_u8(uint8_t val, uint8_t bits) {
     return zig_wrap_u8(val >> (8 - bits), bits);
 }
@@ -1141,6 +1159,24 @@ zig_builtin_clz(16)
 zig_builtin_clz(32)
 zig_builtin_clz(64)
 
+#if zig_has_builtin(abs) || defined(zig_gnuc)
+#define zig_builtin_abs(w) \
+    static inline int##w##_t zig_abs_i##w(int##w##_t val) { \
+        return zig_builtin##w##_rev(abs, val); \
+    }
+#else
+#define zig_builtin_abs(w) \
+    static inline int##w##_t zig_abs_i##w(int##w##_t val) { \
+        if (val == INT##w##_MIN) return val; \
+        int##w##_t tmp = val >> (w - 1); \
+        return (val ^ tmp) - tmp; \
+    }
+#endif
+zig_builtin_abs(8)
+zig_builtin_abs(16)
+zig_builtin_abs(32)
+zig_builtin_abs(64)
+
 /* ======================== 128-bit Integer Support ========================= */
 
 #if !defined(zig_has_int128)
@@ -1466,6 +1502,11 @@ static inline zig_i128 zig_mulw_i128(zig_i128 lhs, zig_i128 rhs, uint8_t bits) {
     return zig_wrap_i128(zig_bitCast_i128(zig_mul_u128(zig_bitCast_u128(lhs), zig_bitCast_u128(rhs))), bits);
 }
 
+static inline zig_u128 zig_abs_i128(zig_i128 val) {
+    zig_i128 tmp = zig_shr_i128(val, 127);
+    return zig_bitCast_u128(zig_sub_i128(zig_xor_i128(val, tmp), tmp));
+}
+
 #if zig_has_int128
 
 static inline bool zig_addo_u128(zig_u128 *res, zig_u128 lhs, zig_u128 rhs, uint8_t bits) {
diff --git a/stage1/zig1.wasm b/stage1/zig1.wasm
index 1db7712fe3..2f6d9abc4e 100644
Binary files a/stage1/zig1.wasm and b/stage1/zig1.wasm differ