fix an off by one in non-temporal hint selection

thank you @The6P4C for finding and reporting!

2 files changed, 6 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 16a9af8..ea850aa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1249,7 +1249,7 @@ impl fmt::Display for Instruction {
             // hint bits of `00` indicate no prefetch hint
             if hint != 0 {
                 f.write_str(
-                    [".nt1", ".nt2", ".nt3"][hint as usize]
+                    [".nt1", ".nt2", ".nt3"][hint as usize - 1]
                 )?;
             }
         }
diff --git a/tests/test.rs b/tests/test.rs
index 8f6feb0..114d81d 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -32,6 +32,11 @@ fn test_invalid_instruction() {
     let data = [0xe3, 0x80, 0x00, 0x00, 0x00, 0x61, 0xe2, 0x00, 0x00, 0x00, 0x42, 0xc0, 0xe1, 0x80, 0x30, 0x00];
     let inst = decoder.decode(data[..].iter().cloned()).unwrap();
     assert_eq!(format!("{}", inst), expected);
+
+    let expected = "[MII] purple.nt3; break.i 0x0; break.i 0x0";
+    let data = [0x00, 0x00, 0x00, 0x00, 0x0E, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00];
+    let inst = decoder.decode(data[..].iter().cloned()).unwrap();
+    assert_eq!(format!("{}", inst), expected);
 }
 #[test]
 fn test_shr_shl_dep_ext() {