From 2bd7b72618921380e600bf888af281f33a0eaed7 Mon Sep 17 00:00:00 2001
From: tuz358 <orca00358@gmail.com>
Date: Wed, 14 Mar 2018 08:32:04 +0900
Subject: [PATCH] Add je_imm8(0x74) instruction

---
 include/instructions.h |  1 +
 instructions.cpp       | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/include/instructions.h b/include/instructions.h
index f02828a..e3366a5 100644
--- a/include/instructions.h
+++ b/include/instructions.h
@@ -85,6 +85,7 @@ public:
   void pop_edi();       // 0x5f
   void push_imm32();    // 0x68
   void push_imm8();     // 0x6a
+  void je_imm8();       // 0x74
   void jne_imm8();      // 0x75
   void opcode_83();     // 0x83
   void mov_rm32_r32();  // 0x89
diff --git a/instructions.cpp b/instructions.cpp
index 28a2e32..c4c4908 100644
--- a/instructions.cpp
+++ b/instructions.cpp
@@ -31,7 +31,7 @@ void Instructions::init_instructions(){
   this->instructions[0x15] = &Instructions::adc_eax_imm32;
   this->instructions[0x19] = &Instructions::sbb_rm32_r32;
   this->instructions[0x1b] = &Instructions::sbb_r32_rm32;
-  this->instructions[0x1d] = &Instructions::sbb_eax_imm32;  
+  this->instructions[0x1d] = &Instructions::sbb_eax_imm32;
   this->instructions[0x21] = &Instructions::and_rm32_r32;
   this->instructions[0x23] = &Instructions::and_r32_rm32;
   this->instructions[0x25] = &Instructions::and_eax_imm32;
@@ -78,6 +78,7 @@ void Instructions::init_instructions(){
   this->instructions[0x5f] = &Instructions::pop_edi;
   this->instructions[0x68] = &Instructions::push_imm32;
   this->instructions[0x6a] = &Instructions::push_imm8;
+  this->instructions[0x74] = &Instructions::je_imm8;
   this->instructions[0x75] = &Instructions::jne_imm8;
   this->instructions[0x83] = &Instructions::opcode_83;
   this->instructions[0x89] = &Instructions::mov_rm32_r32;
@@ -1132,6 +1133,18 @@ void Instructions::push_imm8(){
   this->eip++;
 }
 
+void Instructions::je_imm8(){
+  //printf("je_imm8 called.\n");
+
+  int8_t imm8 = memory.read_int8(this->eip);
+
+  int zero_flag = this->get_flag(ZF);
+  if (zero_flag){
+    this->eip += imm8;
+  }
+  this->eip++;
+}
+
 void Instructions::jne_imm8(){
   //printf("jne_imm8 called.\n");