fixup! Implement llvm.x86.subborrow.32 and llvm.x86.subborrow.64

rust-lang · Sep 23, 2023 · fed4244 · fed4244
1 parent 46434b2
commit fed4244
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/tests/pass/intrinsics-x86.rs b/tests/pass/intrinsics-x86.rs
@@ -33,7 +33,7 @@ mod x86 {
 
         assert_eq!(sbb(0, 1, 1), (0, 0));
         assert_eq!(sbb(1, 1, 1), (1, u32::MAX));
-        assert_eq!(sbb(2, 1, 1), (1, u32::MAX));
+        assert_eq!(sbb(2, 1, 1), (1, u32::MAX)); // any non-zero borrow acts as 1!
         assert_eq!(sbb(u8::MAX, 1, 1), (1, u32::MAX));
         assert_eq!(sbb(0, 2, 1), (0, 1));
         assert_eq!(sbb(1, 2, 1), (0, 0));
@@ -78,7 +78,7 @@ mod x86_64 {
 
         assert_eq!(sbb(0, 1, 1), (0, 0));
         assert_eq!(sbb(1, 1, 1), (1, u64::MAX));
-        assert_eq!(sbb(2, 1, 1), (1, u64::MAX));
+        assert_eq!(sbb(2, 1, 1), (1, u64::MAX)); // any non-zero borrow acts as 1!
         assert_eq!(sbb(u8::MAX, 1, 1), (1, u64::MAX));
         assert_eq!(sbb(0, 2, 1), (0, 1));
         assert_eq!(sbb(1, 2, 1), (0, 0));