From ab51fd1b2c7cf1b7bb6f84c5b07e06245f6b3d99 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Mon, 24 Jul 2023 06:41:02 -0700
Subject: fix handling of lar/lsl source register

---
 test/long_mode/mod.rs      | 18 +++++++++++++-----
 test/protected_mode/mod.rs | 10 ++++++++--
 test/real_mode/mod.rs      | 10 ++++++++--
 3 files changed, 29 insertions(+), 9 deletions(-)

(limited to 'test')

diff --git a/test/long_mode/mod.rs b/test/long_mode/mod.rs
index 9144dbe..3e6b700 100644
--- a/test/long_mode/mod.rs
+++ b/test/long_mode/mod.rs
@@ -2567,12 +2567,20 @@ fn strange_prefixing() {
 
 #[test]
 fn prefixed_0f() {
-    test_display(&[0x0f, 0x02, 0xc0], "lar eax, ax");
-    test_display(&[0x48, 0x0f, 0x02, 0xc0], "lar rax, ax");
-    test_display(&[0x0f, 0x03, 0xc0], "lsl eax, eax");
-    // capstone says `lsl rax, rax`, but xed says `rax, eax`. intel docs also say second reg should
+    test_display(&[0x0f, 0x02, 0x01], "lar eax, word [rcx]");
+    test_display(&[0x0f, 0x02, 0xc1], "lar eax, ecx");
+    test_display(&[0x4f, 0x0f, 0x02, 0x01], "lar r8, word [r9]");
+    test_display(&[0x4f, 0x0f, 0x02, 0xc1], "lar r8, r9");
+    test_display(&[0x66, 0x0f, 0x02, 0x01], "lar ax, word [rcx]");
+    test_display(&[0x66, 0x0f, 0x02, 0xc1], "lar ax, cx");
+    test_display(&[0x0f, 0x03, 0x01], "lsl eax, word [rcx]");
+    test_display(&[0x0f, 0x03, 0xc1], "lsl eax, ecx");
+    test_display(&[0x48, 0x0f, 0x03, 0x01], "lsl rax, word [rcx]");
+    // capstone says `lsl rax, rcx`, but xed says `rax, ecx`. intel docs also say second reg should
     // be dword.
-    test_display(&[0x48, 0x0f, 0x03, 0xc0], "lsl rax, eax");
+    test_display(&[0x48, 0x0f, 0x03, 0xc1], "lsl rax, ecx");
+    test_display(&[0x66, 0x0f, 0x03, 0x01], "lsl ax, word [rcx]");
+    test_display(&[0x66, 0x0f, 0x03, 0xc1], "lsl ax, cx");
     test_display(&[0x0f, 0x05], "syscall");
     test_display(&[0x48, 0x0f, 0x05], "syscall");
     test_display(&[0x66, 0x0f, 0x05], "syscall");
diff --git a/test/protected_mode/mod.rs b/test/protected_mode/mod.rs
index 5229617..85d92ce 100644
--- a/test/protected_mode/mod.rs
+++ b/test/protected_mode/mod.rs
@@ -2270,8 +2270,14 @@ fn strange_prefixing() {
 
 #[test]
 fn prefixed_0f() {
-    test_display(&[0x0f, 0x02, 0xc0], "lar eax, ax");
-    test_display(&[0x0f, 0x03, 0xc0], "lsl eax, eax");
+    test_display(&[0x0f, 0x02, 0x01], "lar eax, word [ecx]");
+    test_display(&[0x0f, 0x02, 0xc1], "lar eax, ecx");
+    test_display(&[0x66, 0x0f, 0x02, 0x01], "lar ax, word [ecx]");
+    test_display(&[0x66, 0x0f, 0x02, 0xc1], "lar ax, cx");
+    test_display(&[0x0f, 0x03, 0x01], "lsl eax, word [ecx]");
+    test_display(&[0x0f, 0x03, 0xc1], "lsl eax, ecx");
+    test_display(&[0x66, 0x0f, 0x03, 0x01], "lsl ax, word [ecx]");
+    test_display(&[0x66, 0x0f, 0x03, 0xc1], "lsl ax, cx");
     test_display(&[0x0f, 0x05], "syscall");
     test_display(&[0x66, 0x0f, 0x05], "syscall");
     test_display(&[0x0f, 0x06], "clts");
diff --git a/test/real_mode/mod.rs b/test/real_mode/mod.rs
index 7cf5fc2..2ae52d8 100644
--- a/test/real_mode/mod.rs
+++ b/test/real_mode/mod.rs
@@ -162,8 +162,10 @@ fn test_real_mode() {
     test_display(&[0x0f, 0x01, 0xfb], "mwaitx");
     test_display(&[0x0f, 0x01, 0xfc], "clzero");
     test_display(&[0x0f, 0x01, 0xfd], "rdpru ecx");
-    test_display(&[0x0f, 0x02, 0xc0], "lar ax, ax");
-    test_display(&[0x0f, 0x03, 0xc0], "lsl ax, ax");
+    test_display(&[0x0f, 0x02, 0x01], "lar ax, word [bx + di * 1]");
+    test_display(&[0x0f, 0x02, 0xc1], "lar ax, cx");
+    test_display(&[0x0f, 0x03, 0x01], "lsl ax, word [bx + di * 1]");
+    test_display(&[0x0f, 0x03, 0xc1], "lsl ax, cx");
     test_display(&[0x0f, 0x05], "syscall");
     test_display(&[0x0f, 0x06], "clts");
     test_display(&[0x0f, 0x07], "sysret");
@@ -16715,6 +16717,10 @@ fn test_real_mode() {
     test_display(&[0x65, 0x89, 0x04], "mov word gs:[si], ax");
     test_display(&[0x65, 0xf0, 0x87, 0x0f], "lock xchg word gs:[bx], cx");
     test_display(&[0x66, 0x0f, 0x01, 0xd8], "vmrun ax");
+    test_display(&[0x66, 0x0f, 0x02, 0x01], "lar eax, word [bx + di * 1]");
+    test_display(&[0x66, 0x0f, 0x02, 0xc1], "lar eax, ecx");
+    test_display(&[0x66, 0x0f, 0x03, 0x01], "lsl eax, word [bx + di * 1]");
+    test_display(&[0x66, 0x0f, 0x03, 0xc1], "lsl eax, ecx");
     test_display(&[0x66, 0x0f, 0x05], "syscall");
     test_display(&[0x66, 0x0f, 0x0f, 0xc6, 0xb7], "pmulhrw mm0, mm6");
     test_display(&[0x66, 0x0f, 0x10, 0xc0], "movupd xmm0, xmm0");
-- 
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