From 32e19781c554c83643fcab4c4f39a6a552c367f5 Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Tue, 10 Nov 2020 20:05:04 +0100
Subject: Implemented dec, mul, imul

---
 asm/intel64/all_ops.h |  3 +++
 asm/intel64/dec.cpp   | 43 +++++++++++++++++++++++++++++++++++++++++++
 asm/intel64/dec.h     | 31 +++++++++++++++++++++++++++++++
 asm/intel64/imul.cpp  | 43 +++++++++++++++++++++++++++++++++++++++++++
 asm/intel64/imul.h    | 31 +++++++++++++++++++++++++++++++
 asm/intel64/mul.cpp   | 43 +++++++++++++++++++++++++++++++++++++++++++
 asm/intel64/mul.h     | 31 +++++++++++++++++++++++++++++++
 7 files changed, 225 insertions(+)
 create mode 100644 asm/intel64/dec.cpp
 create mode 100644 asm/intel64/dec.h
 create mode 100644 asm/intel64/imul.cpp
 create mode 100644 asm/intel64/imul.h
 create mode 100644 asm/intel64/mul.cpp
 create mode 100644 asm/intel64/mul.h

(limited to 'asm')

diff --git a/asm/intel64/all_ops.h b/asm/intel64/all_ops.h
index 59ce624..9f41c5d 100644
--- a/asm/intel64/all_ops.h
+++ b/asm/intel64/all_ops.h
@@ -1,10 +1,13 @@
 #pragma once
 
 #include "add.h"
+#include "dec.h"
+#include "imul.h"
 #include "inc.h"
 #include "int.h"
 #include "jmp.h"
 #include "mov.h"
+#include "mul.h"
 #include "nop.h"
 #include "ret.h"
 #include "xor.h"
diff --git a/asm/intel64/dec.cpp b/asm/intel64/dec.cpp
new file mode 100644
index 0000000..dab603a
--- /dev/null
+++ b/asm/intel64/dec.cpp
@@ -0,0 +1,43 @@
+#include "dec.h"
+
+#include "codes.h"
+
+#include <asm/assembler.h>
+#include <asm/operators.h>
+
+#include <asm/intel64/codes.h>
+
+using namespace std::string_literals;
+
+Op_dec::Op_dec(Asm::Args& args)
+{
+ if (args[0].type() == typeid(Asm::Args::Register8)) { // dec reg8
+  machine_code = std::vector<uint8_t>{ 0xFE } +
+   ModRM("/1", std::any_cast<Asm::Args::Register8>(args[0]).name());
+ } else if (args[0].type() == typeid(Asm::Args::Register32)) { // dec reg32
+  machine_code = std::vector<uint8_t>{ 0xFF } +
+   ModRM("/1", std::any_cast<Asm::Args::Register32>(args[0]).name());
+ } else if (args[0].type() == typeid(Asm::Args::Register64)) { // dec reg64
+  machine_code = REX("W") + std::vector<uint8_t>{ 0xFF } +
+   ModRM("/1", std::any_cast<Asm::Args::Register64>(args[0]).name());
+ } else {
+  throw std::runtime_error("Unimplemented: dec "s + args[0].type().name());
+ }
+}
+
+namespace {
+
+bool registered {
+ registerOp(mangleName<Asm::Args::Register8>("dec"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_dec>(args);
+            }) &&
+ registerOp(mangleName<Asm::Args::Register32>("dec"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_dec>(args);
+            }) &&
+ registerOp(mangleName<Asm::Args::Register64>("dec"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_dec>(args);
+            })
+};
+
+}
+
diff --git a/asm/intel64/dec.h b/asm/intel64/dec.h
new file mode 100644
index 0000000..293ba8d
--- /dev/null
+++ b/asm/intel64/dec.h
@@ -0,0 +1,31 @@
+// Decrement Register
+
+#pragma once
+
+#include <asm/assembler.h>
+
+class Op_dec: public Op
+{
+public:
+ Op_dec(Asm::Args& args);
+
+public:
+ std::vector<uint8_t> getCode() override
+ {
+  return machine_code;
+ }
+
+ size_t size() override
+ {
+  return machine_code.size();
+ }
+
+ bool optimize() override ///< returns true if changed
+ {
+  return false;
+ }
+
+protected:
+ std::vector<uint8_t> machine_code;
+};
+
diff --git a/asm/intel64/imul.cpp b/asm/intel64/imul.cpp
new file mode 100644
index 0000000..4df8577
--- /dev/null
+++ b/asm/intel64/imul.cpp
@@ -0,0 +1,43 @@
+#include "imul.h"
+
+#include "codes.h"
+
+#include <asm/assembler.h>
+#include <asm/operators.h>
+
+#include <asm/intel64/codes.h>
+
+using namespace std::string_literals;
+
+Op_imul::Op_imul(Asm::Args& args)
+{
+ if (args[0].type() == typeid(Asm::Args::Register8)) { // imul reg8 (accu is ax <- al)
+  machine_code = std::vector<uint8_t>{ 0xF6 } +
+   ModRM("/5", std::any_cast<Asm::Args::Register8>(args[0]).name());
+ } else if (args[0].type() == typeid(Asm::Args::Register32)) { // imul reg32 (accu is edx:eax <- eax)
+  machine_code = std::vector<uint8_t>{ 0xF7 } +
+   ModRM("/5", std::any_cast<Asm::Args::Register32>(args[0]).name());
+ } else if (args[0].type() == typeid(Asm::Args::Register64)) { // imul reg64 (accu is rdx:rax <- rax)
+  machine_code = REX("W") + std::vector<uint8_t>{ 0xF7 } +
+   ModRM("/5", std::any_cast<Asm::Args::Register64>(args[0]).name());
+ } else {
+  throw std::runtime_error("Unimplemented: imul "s + args[0].type().name());
+ }
+}
+
+namespace {
+
+bool registered {
+ registerOp(mangleName<Asm::Args::Register8>("imul"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_imul>(args);
+            }) &&
+ registerOp(mangleName<Asm::Args::Register32>("imul"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_imul>(args);
+            }) &&
+ registerOp(mangleName<Asm::Args::Register64>("imul"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_imul>(args);
+            })
+};
+
+}
+
diff --git a/asm/intel64/imul.h b/asm/intel64/imul.h
new file mode 100644
index 0000000..387d87f
--- /dev/null
+++ b/asm/intel64/imul.h
@@ -0,0 +1,31 @@
+// Multiply Signed Integer
+
+#pragma once
+
+#include <asm/assembler.h>
+
+class Op_imul: public Op
+{
+public:
+ Op_imul(Asm::Args& args);
+
+public:
+ std::vector<uint8_t> getCode() override
+ {
+  return machine_code;
+ }
+
+ size_t size() override
+ {
+  return machine_code.size();
+ }
+
+ bool optimize() override ///< returns true if changed
+ {
+  return false;
+ }
+
+protected:
+ std::vector<uint8_t> machine_code;
+};
+
diff --git a/asm/intel64/mul.cpp b/asm/intel64/mul.cpp
new file mode 100644
index 0000000..e4c3489
--- /dev/null
+++ b/asm/intel64/mul.cpp
@@ -0,0 +1,43 @@
+#include "mul.h"
+
+#include "codes.h"
+
+#include <asm/assembler.h>
+#include <asm/operators.h>
+
+#include <asm/intel64/codes.h>
+
+using namespace std::string_literals;
+
+Op_mul::Op_mul(Asm::Args& args)
+{
+ if (args[0].type() == typeid(Asm::Args::Register8)) { // mul reg8 (accu is ax <- al)
+  machine_code = std::vector<uint8_t>{ 0xF6 } +
+   ModRM("/4", std::any_cast<Asm::Args::Register8>(args[0]).name());
+ } else if (args[0].type() == typeid(Asm::Args::Register32)) { // mul reg32 (accu is edx:eax <- eax)
+  machine_code = std::vector<uint8_t>{ 0xF7 } +
+   ModRM("/4", std::any_cast<Asm::Args::Register32>(args[0]).name());
+ } else if (args[0].type() == typeid(Asm::Args::Register64)) { // mul reg64 (accu is rdx:rax <- rax)
+  machine_code = REX("W") + std::vector<uint8_t>{ 0xF7 } +
+   ModRM("/4", std::any_cast<Asm::Args::Register64>(args[0]).name());
+ } else {
+  throw std::runtime_error("Unimplemented: mul "s + args[0].type().name());
+ }
+}
+
+namespace {
+
+bool registered {
+ registerOp(mangleName<Asm::Args::Register8>("mul"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_mul>(args);
+            }) &&
+ registerOp(mangleName<Asm::Args::Register32>("mul"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_mul>(args);
+            }) &&
+ registerOp(mangleName<Asm::Args::Register64>("mul"), [](Asm::Args& args) -> std::shared_ptr<Op>{
+               return std::make_shared<Op_mul>(args);
+            })
+};
+
+}
+
diff --git a/asm/intel64/mul.h b/asm/intel64/mul.h
new file mode 100644
index 0000000..9ff31d1
--- /dev/null
+++ b/asm/intel64/mul.h
@@ -0,0 +1,31 @@
+// Multiply Unsigned Integer
+
+#pragma once
+
+#include <asm/assembler.h>
+
+class Op_mul: public Op
+{
+public:
+ Op_mul(Asm::Args& args);
+
+public:
+ std::vector<uint8_t> getCode() override
+ {
+  return machine_code;
+ }
+
+ size_t size() override
+ {
+  return machine_code.size();
+ }
+
+ bool optimize() override ///< returns true if changed
+ {
+  return false;
+ }
+
+protected:
+ std::vector<uint8_t> machine_code;
+};
+
-- 
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