clarify inaccurate 32/16-bit `call/jmp [mem]` mem_size

1 files changed, 5 insertions, 2 deletions

diff --git a/test/real_mode/operand.rs b/test/real_mode/operand.rs
index e037fee..7f2b72e 100644
--- a/test/real_mode/operand.rs
+++ b/test/real_mode/operand.rs
@@ -1,5 +1,4 @@
-use yaxpeax_x86::real_mode::{InstDecoder, Operand, RegSpec};
-use yaxpeax_x86::MemoryAccessSize;
+use yaxpeax_x86::real_mode::{InstDecoder};
 
 #[test]
 fn test_implied_memory_width() {
@@ -17,4 +16,8 @@ fn test_implied_memory_width() {
     assert_eq!(mem_size_of(&[0x66, 0x58]), Some(2));
     assert_eq!(mem_size_of(&[0xff, 0xf0]), Some(2));
     assert_eq!(mem_size_of(&[0x66, 0xff, 0xf0]), Some(4));
+    // unlike 64-bit mode, operand-size prefixed call and jump do have a different size: they read
+    // four bytes.
+    assert_eq!(mem_size_of(&[0x66, 0xff, 0x10]), Some(4));
+    assert_eq!(mem_size_of(&[0x66, 0xff, 0x20]), Some(4));
 }