From 1af1ff44fd4c800e177fe6e0555faa6da76da5a7 Mon Sep 17 00:00:00 2001
From: tuz358 <orca00358@gmail.com>
Date: Sun, 18 Mar 2018 16:06:58 +0900
Subject: [PATCH] Add xor_rm32_imm(0x81,0x83) instruction

---
 include/instructions.h |  1 +
 instructions.cpp       | 22 ++++++++++++++++++++--
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/include/instructions.h b/include/instructions.h
index 1fa0e79..7a1918c 100644
--- a/include/instructions.h
+++ b/include/instructions.h
@@ -138,5 +138,6 @@ public:
   void sbb_rm32_imm(int imm_flag);
   void and_rm32_imm(int imm_flag);
   void sub_rm32_imm(int imm_flag);
+  void xor_rm32_imm(int imm_flag);
   void cmp_rm32_imm8();
 };
diff --git a/instructions.cpp b/instructions.cpp
index e969b35..ec23826 100644
--- a/instructions.cpp
+++ b/instructions.cpp
@@ -490,7 +490,7 @@ void Instructions::opcode_81(){
       sub_rm32_imm(IMM32);
       break;
     case 6:
-      // TODO: xor_rm32_imm32();
+      xor_rm32_imm(IMM32);
       break;
     case 7:
       // TODO: cmp_rm32_imm8();
@@ -526,7 +526,7 @@ void Instructions::opcode_83(){
       sub_rm32_imm(IMM8);
       break;
     case 6:
-      // TODO: xor_rm32_imm8();
+      xor_rm32_imm(IMM8);
       break;
     case 7:
       cmp_rm32_imm8();
@@ -892,6 +892,24 @@ void Instructions::sub_rm32_imm(int imm_flag){
   this->eip++;
 }
 
+void Instructions::xor_rm32_imm(int imm_flag){
+  //printf("xor_rm32_imm called.\n");
+
+  this->eip++;
+
+  if(imm_flag == IMM8){
+    uint8_t imm8 = memory.read_uint8(this->eip);
+    this->registers[this->M] ^= imm8;
+  } else if(imm_flag == IMM32){
+    uint32_t imm32 = memory.read_uint32(this->eip);
+    imm32 = swap_endian32(imm32);
+    this->registers[this->M] ^= imm32;
+  } else {
+  }
+
+  this->eip++;
+}
+
 void Instructions::cmp_rm32_imm8(){
   //printf("cmp_rm32_imm8 called.\n");