abnormal memory sizes for keylocker instructions are not bugs

new `does_not_decode_invalid_registers` fuzzer found other bugs! the
384-bit accesses for 128b keylocker instructions are an
otherwise-unknown size and had a memory size of `BUG`. they are not
bugs. give the memory size a real name.

5 files changed, 15 insertions, 1 deletions

diff --git a/CHANGELOG b/CHANGELOG
index f24a628..49b361f 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -8,6 +8,9 @@
   in register class `B` does not imply that there was no `rex.w` on the
   instruction - `rex.w` may have been present but the register number may have
   been <4 such that `B` was an appropriate register class anyway.
+* fix missing memory access size text for 128-bit keylocker instructions (would
+  have text like "aesdec128kl xmm0, BUG [rcx]" rather than "..., m384b [rcx]".
+  instructions are otherwise decoded correctly.)
 
 ## 1.2.0
 * fix incorrect old yaxpeax-arch version selection for ffi crates
diff --git a/src/lib.rs b/src/lib.rs
index 86354ca..188a37a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -146,7 +146,7 @@ const MEM_SIZE_STRINGS: [&'static str; 64] = [
     "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG",
     "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "ymmword",
     "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG",
-    "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG",
+    "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "m384b",
     "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG",
     "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "ptr", "zmmword",
 ];
diff --git a/test/long_mode/mod.rs b/test/long_mode/mod.rs
index 25a303c..6b04be2 100644
--- a/test/long_mode/mod.rs
+++ b/test/long_mode/mod.rs
@@ -3442,6 +3442,11 @@ fn test_sevsnp() {
     test_display(&[0xf2, 0x0f, 0x01, 0xfe], "rmpupdate");
 }
 
+#[test]
+fn test_keylocker() {
+    test_display(&[0xf3, 0x0f, 0x38, 0xdd, 0x03], "aesdec128kl xmm0, m384b [rbx]");
+}
+
 // some test cases are best just lifted from llvm or gcc.
 #[test]
 fn from_llvm() {
diff --git a/test/protected_mode/mod.rs b/test/protected_mode/mod.rs
index 8b5571d..752c9df 100644
--- a/test/protected_mode/mod.rs
+++ b/test/protected_mode/mod.rs
@@ -3118,6 +3118,11 @@ fn test_sevsnp() {
     test_display(&[0xf2, 0x0f, 0x01, 0xfe], "rmpupdate");
 }
 
+#[test]
+fn test_keylocker() {
+    test_display(&[0xf3, 0x0f, 0x38, 0xdd, 0x03], "aesdec128kl xmm0, m384b [ebx]");
+}
+
 // some test cases are best just lifted from llvm or gcc.
 #[test]
 fn from_llvm() {
diff --git a/test/real_mode/mod.rs b/test/real_mode/mod.rs
index 7987e4a..1b1a378 100644
--- a/test/real_mode/mod.rs
+++ b/test/real_mode/mod.rs
@@ -17879,6 +17879,7 @@ fn test_real_mode() {
     test_display(&[0xf3, 0x0f, 0x2c, 0xc1], "cvttss2si eax, xmm1");
     test_display(&[0xf3, 0x0f, 0x2d, 0x01], "cvtss2si eax, dword [bx + di * 1]");
     test_display(&[0xf3, 0x0f, 0x2d, 0xc1], "cvtss2si eax, xmm1");
+    test_display(&[0xf3, 0x0f, 0x38, 0xdd, 0x03], "aesdec128kl xmm0, m384b [bp + di * 1]");
     test_display(&[0xf3, 0x0f, 0x38, 0xf6, 0x01], "adox eax, dword [bx + di * 1]");
     test_display(&[0xf3, 0x0f, 0x38, 0xf6, 0xc1], "adox eax, ecx");
     test_display(&[0xf3, 0x0f, 0x51, 0x01], "sqrtss xmm0, dword [bx + di * 1]");