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-rw-r--r--test/long_mode/operand.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/test/long_mode/operand.rs b/test/long_mode/operand.rs
index 4cdaf35..a47e6c8 100644
--- a/test/long_mode/operand.rs
+++ b/test/long_mode/operand.rs
@@ -45,4 +45,7 @@ fn test_implied_memory_width() {
assert_eq!(mem_size_of(&[0x66, 0x58]), Some(8));
assert_eq!(mem_size_of(&[0xff, 0xf0]), Some(8));
assert_eq!(mem_size_of(&[0x66, 0xff, 0xf0]), Some(2));
+ // operand-size prefixed call and jump still reads 8 bytes (prefix ignored)
+ assert_eq!(mem_size_of(&[0x66, 0xff, 0x10]), Some(8));
+ assert_eq!(mem_size_of(&[0x66, 0xff, 0x20]), Some(8));
}