smaller tables and err variants preserves perf, but less code/data

1 files changed, 57 insertions, 515 deletions

diff --git a/src/long_mode/mod.rs b/src/long_mode/mod.rs
index 4d61b18..d74b974 100644
--- a/src/long_mode/mod.rs
+++ b/src/long_mode/mod.rs
@@ -6464,10 +6464,10 @@ fn read_opc_hotpath<
         let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
         let (r, len) = if b == 0x38 {
             let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
-            (self.read_0f38_opcode(b, &mut instruction.prefixes), 3)
+            (self.read_0f38_opcode(b, &mut instruction.prefixes)?, 3)
         } else if b == 0x3a {
             let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
-            (self.read_0f3a_opcode(b, &mut instruction.prefixes), 3)
+            (self.read_0f3a_opcode(b, &mut instruction.prefixes)?, 3)
         } else {
             (self.read_0f_opcode(b, &mut instruction.prefixes), 2)
         };
@@ -6530,20 +6530,13 @@ fn read_with_annotations<
             } else {
                 let b = nextb;
                 if b == 0x0f {
-                    if words.offset() > 1 {
-                        sink.record(
-                            words.offset() as u32 * 8 - 8 - 1, words.offset() as u32 * 8 - 8 - 1,
-                            InnerDescription::Boundary("prefixes end")
-                                .with_id(words.offset() as u32 * 8 - 9)
-                        );
-                    }
                     let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
                     let (rec, len) = if b == 0x38 {
                         let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
-                        (self.read_0f38_opcode(b, prefixes), 3)
+                        (self.read_0f38_opcode(b, prefixes)?, 3)
                     } else if b == 0x3a {
                         let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
-                        (self.read_0f3a_opcode(b, prefixes), 3)
+                        (self.read_0f3a_opcode(b, prefixes)?, 3)
                     } else {
                         (self.read_0f_opcode(b, prefixes), 2)
                     };
@@ -10073,227 +10066,9 @@ fn read_0f_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRecor
 }
 
 #[inline(always)]
-fn read_0f38_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRecord {
+fn read_0f38_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> Result<OpcodeRecord, DecodeError> {
     if prefixes.rep() {
-        const TBL: [OpcodeRecord; 0x100] = [
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            // 0xd0
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            // 0xd8
+        const TBL: [OpcodeRecord; 0x28] = [
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::ModRM_0xf30f38d8),
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
@@ -10340,7 +10115,11 @@ fn read_0f38_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRec
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
         ];
-        return TBL[opcode as usize];
+        return if opcode < 0xd8 {
+            Err(DecodeError::InvalidOpcode)
+        } else {
+            Ok(TBL[(opcode - 0xd8) as usize])
+        };
         /*
             0xf6 => OpcodeRecord(Interpretation::Instruction(Opcode::ADOX), OperandCode::Gv_Ev),
             0xf8 => {
@@ -10360,248 +10139,7 @@ fn read_0f38_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRec
     }
 
     if prefixes.repnz() {
-        const TBL: [OpcodeRecord; 0x100] = [
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            // 0xe0
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
-            OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
+        const TBL: [OpcodeRecord; 0x10] = [
             // 0xf0
             OpcodeRecord(Interpretation::Instruction(Opcode::CRC32), OperandCode::Gv_Eb),
             OpcodeRecord(Interpretation::Instruction(Opcode::CRC32), OperandCode::Gdq_Ev),
@@ -10623,7 +10161,11 @@ fn read_0f38_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRec
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
             OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
         ];
-        return TBL[opcode as usize];
+        return if opcode < 0xf0 {
+            Err(DecodeError::InvalidOpcode)
+        } else {
+            Ok(TBL[(opcode - 0xf0) as usize])
+        };
     }
 
     if prefixes.operand_size() {
@@ -10637,71 +10179,71 @@ fn read_0f38_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRec
             }
         }
 
-        return TBL_ASDF[opcode as usize];
+        return Ok(TBL_ASDF[opcode as usize]);
     } else {
-        return TBL_ASDF2[opcode as usize];
+        return Ok(TBL_ASDF2[opcode as usize]);
     }
 }
 
 #[inline(always)]
-fn read_0f3a_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> OpcodeRecord {
+fn read_0f3a_opcode(&mut self, opcode: u8, prefixes: &mut Prefixes) -> Result<OpcodeRecord, DecodeError> {
     if prefixes.rep() {
         if prefixes != &Prefixes::new(0x10) {
-            return OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing);
+            return Err(DecodeError::InvalidOpcode);
         }
         return match opcode {
-            0xf0 => OpcodeRecord(Interpretation::Instruction(Opcode::HRESET), OperandCode::ModRM_0xf30f3af0),
-            _ => OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
+            0xf0 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::HRESET), OperandCode::ModRM_0xf30f3af0)),
+            _ => Err(DecodeError::InvalidOpcode),
         };
     }
 
     if prefixes.repnz() {
-        return OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing);
+        return Err(DecodeError::InvalidOpcode);
     }
 
     if prefixes.operand_size() {
         if opcode == 0x16 && prefixes.rex_unchecked().w() {
-            return OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRQ), OperandCode::G_Ev_xmm_Ib);
+            return Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRQ), OperandCode::G_Ev_xmm_Ib));
         } else if opcode == 0x22 && prefixes.rex_unchecked().w() {
-            return OpcodeRecord(Interpretation::Instruction(Opcode::PINSRQ), OperandCode::G_Ev_xmm_Ib);
+            return Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PINSRQ), OperandCode::G_Ev_xmm_Ib));
         }
 
         return match opcode {
-            0x08 => OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDPS), OperandCode::G_E_xmm_Ib),
-            0x09 => OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDPD), OperandCode::G_E_xmm_Ib),
-            0x0a => OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDSS), OperandCode::G_E_xmm_Ib),
-            0x0b => OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDSD), OperandCode::G_E_xmm_Ib),
-            0x0c => OpcodeRecord(Interpretation::Instruction(Opcode::BLENDPS), OperandCode::G_E_xmm_Ib),
-            0x0d => OpcodeRecord(Interpretation::Instruction(Opcode::BLENDPD), OperandCode::G_E_xmm_Ib),
-            0x0e => OpcodeRecord(Interpretation::Instruction(Opcode::PBLENDW), OperandCode::G_E_xmm_Ib),
-            0x0f => OpcodeRecord(Interpretation::Instruction(Opcode::PALIGNR), OperandCode::G_E_xmm_Ib),
-            0x14 => OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRB), OperandCode::G_Ev_xmm_Ib),
-            0x15 => OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRW), OperandCode::G_Ev_xmm_Ib),
-            0x16 => OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRD), OperandCode::G_Ev_xmm_Ib),
-            0x17 => OpcodeRecord(Interpretation::Instruction(Opcode::EXTRACTPS), OperandCode::G_Ev_xmm_Ib),
-            0x20 => OpcodeRecord(Interpretation::Instruction(Opcode::PINSRB), OperandCode::G_Ev_xmm_Ib),
-            0x21 => OpcodeRecord(Interpretation::Instruction(Opcode::INSERTPS), OperandCode::G_Ev_xmm_Ib),
-            0x22 => OpcodeRecord(Interpretation::Instruction(Opcode::PINSRD), OperandCode::G_Ev_xmm_Ib),
-            0x40 => OpcodeRecord(Interpretation::Instruction(Opcode::DPPS), OperandCode::G_E_xmm_Ib),
-            0x41 => OpcodeRecord(Interpretation::Instruction(Opcode::DPPD), OperandCode::G_E_xmm_Ib),
-            0x42 => OpcodeRecord(Interpretation::Instruction(Opcode::MPSADBW), OperandCode::G_E_xmm_Ib),
-            0x44 => OpcodeRecord(Interpretation::Instruction(Opcode::PCLMULQDQ), OperandCode::G_E_xmm_Ib),
-            0x60 => OpcodeRecord(Interpretation::Instruction(Opcode::PCMPESTRM), OperandCode::G_E_xmm_Ib),
-            0x61 => OpcodeRecord(Interpretation::Instruction(Opcode::PCMPESTRI), OperandCode::G_E_xmm_Ib),
-            0x62 => OpcodeRecord(Interpretation::Instruction(Opcode::PCMPISTRM), OperandCode::G_E_xmm_Ib),
-            0x63 => OpcodeRecord(Interpretation::Instruction(Opcode::PCMPISTRI), OperandCode::G_E_xmm_Ib),
-//            0xcc => OpcodeRecord(Interpretation::Instruction(Opcode::SHA1RNDS4), OperandCode::G_E_xmm_Ib),
-            0xce => OpcodeRecord(Interpretation::Instruction(Opcode::GF2P8AFFINEQB), OperandCode::G_E_xmm_Ub),
-            0xcf => OpcodeRecord(Interpretation::Instruction(Opcode::GF2P8AFFINEINVQB), OperandCode::G_E_xmm_Ub),
-            0xdf => OpcodeRecord(Interpretation::Instruction(Opcode::AESKEYGENASSIST), OperandCode::G_E_xmm_Ub),
-            _ => OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
+            0x08 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDPS), OperandCode::G_E_xmm_Ib)),
+            0x09 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDPD), OperandCode::G_E_xmm_Ib)),
+            0x0a => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDSS), OperandCode::G_E_xmm_Ib)),
+            0x0b => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::ROUNDSD), OperandCode::G_E_xmm_Ib)),
+            0x0c => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::BLENDPS), OperandCode::G_E_xmm_Ib)),
+            0x0d => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::BLENDPD), OperandCode::G_E_xmm_Ib)),
+            0x0e => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PBLENDW), OperandCode::G_E_xmm_Ib)),
+            0x0f => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PALIGNR), OperandCode::G_E_xmm_Ib)),
+            0x14 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRB), OperandCode::G_Ev_xmm_Ib)),
+            0x15 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRW), OperandCode::G_Ev_xmm_Ib)),
+            0x16 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PEXTRD), OperandCode::G_Ev_xmm_Ib)),
+            0x17 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::EXTRACTPS), OperandCode::G_Ev_xmm_Ib)),
+            0x20 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PINSRB), OperandCode::G_Ev_xmm_Ib)),
+            0x21 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::INSERTPS), OperandCode::G_Ev_xmm_Ib)),
+            0x22 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PINSRD), OperandCode::G_Ev_xmm_Ib)),
+            0x40 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::DPPS), OperandCode::G_E_xmm_Ib)),
+            0x41 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::DPPD), OperandCode::G_E_xmm_Ib)),
+            0x42 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::MPSADBW), OperandCode::G_E_xmm_Ib)),
+            0x44 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PCLMULQDQ), OperandCode::G_E_xmm_Ib)),
+            0x60 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PCMPESTRM), OperandCode::G_E_xmm_Ib)),
+            0x61 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PCMPESTRI), OperandCode::G_E_xmm_Ib)),
+            0x62 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PCMPISTRM), OperandCode::G_E_xmm_Ib)),
+            0x63 => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PCMPISTRI), OperandCode::G_E_xmm_Ib)),
+//            0xcc => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::SHA1RNDS4), OperandCode::G_E_xmm_Ib)),
+            0xce => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::GF2P8AFFINEQB), OperandCode::G_E_xmm_Ub)),
+            0xcf => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::GF2P8AFFINEINVQB), OperandCode::G_E_xmm_Ub)),
+            0xdf => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::AESKEYGENASSIST), OperandCode::G_E_xmm_Ub)),
+            _ => Err(DecodeError::InvalidOpcode),
         };
     }
 
     return match opcode {
-        0xcc => OpcodeRecord(Interpretation::Instruction(Opcode::SHA1RNDS4), OperandCode::G_E_xmm_Ub),
-        0x0f => OpcodeRecord(Interpretation::Instruction(Opcode::PALIGNR), OperandCode::G_E_mm_Ib),
-        _ => OpcodeRecord(Interpretation::Instruction(Opcode::Invalid), OperandCode::Nothing),
+        0xcc => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::SHA1RNDS4), OperandCode::G_E_xmm_Ub)),
+        0x0f => Ok(OpcodeRecord(Interpretation::Instruction(Opcode::PALIGNR), OperandCode::G_E_mm_Ib)),
+        _ => Err(DecodeError::InvalidOpcode)
     };
 }
 }