From d13d8ebfad98b3d547f455ec9d73dab98f0899c3 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Sun, 19 Dec 2021 09:06:12 -0800
Subject: test that invalid RegSpec constructions panic as expected

in the process, fix 64-bit rex-byte limit, 32/16-bit mode mask reg limit
---
 src/long_mode/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/long_mode')

diff --git a/src/long_mode/mod.rs b/src/long_mode/mod.rs
index 866eb8f..7e8dff7 100644
--- a/src/long_mode/mod.rs
+++ b/src/long_mode/mod.rs
@@ -232,7 +232,7 @@ impl RegSpec {
     /// construct a `RegSpec` for non-rex byte reg `num`
     #[inline]
     pub fn rb(num: u8) -> RegSpec {
-        if num >= 18 {
+        if num >= 16 {
             panic!("invalid x86 rex-byte reg {}", num);
         }
 
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