ir: Add an opcode for doing an SM4 lookup table query

src/CMakeLists.txt

@@ -24,6 +24,8 @@ add_library(dynarmic
     common/memory_pool.h
     common/mp.h
     common/scope_exit.h
+    common/sm4.cpp
+    common/sm4.h
     common/string_util.h
     common/variant_util.h
     frontend/A32/decoder/arm.h
@@ -182,6 +184,7 @@ if (ARCHITECTURE_x86_64)
          backend_x64/emit_x64_floating_point.cpp
          backend_x64/emit_x64_packed.cpp
          backend_x64/emit_x64_saturation.cpp
+         backend_x64/emit_x64_sm4.cpp
          backend_x64/emit_x64_vector.cpp
          backend_x64/emit_x64_vector_floating_point.cpp
          backend_x64/hostloc.cpp

src/backend_x64/emit_x64_sm4.cpp

@@ -0,0 +1,23 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public icense version 2 or any later version.
+ */
+
+#include "backend_x64/block_of_code.h"
+#include "backend_x64/emit_x64.h"
+#include "common/common_types.h"
+#include "common/sm4.h"
+#include "frontend/ir/microinstruction.h"
+#include "frontend/ir/opcodes.h"
+
+namespace Dynarmic::BackendX64 {
+
+void EmitX64::EmitSM4AccessSubstitutionBox(EmitContext& ctx, IR::Inst* inst) {
+    auto args = ctx.reg_alloc.GetArgumentInfo(inst);
+
+    ctx.reg_alloc.HostCall(inst, args[0]);
+    code.CallFunction(&Common::SM4::AccessSubstitutionBox);
+}
+
+} // namespace Dynarmic::BackendX64

src/common/sm4.cpp

@@ -0,0 +1,55 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#include <array>
+
+#include "common/sm4.h"
+#include "common/common_types.h"
+
+namespace Dynarmic::Common::SM4 {
+
+using SubstitutionTable = std::array<u8, 256>;
+
+constexpr SubstitutionTable substitution_box{{
+    0xD6, 0x90, 0xE9, 0xFE, 0xCC, 0xE1, 0x3D, 0xB7,
+    0x16, 0xB6, 0x14, 0xC2, 0x28, 0xFB, 0x2C, 0x05,
+    0x2B, 0x67, 0x9A, 0x76, 0x2A, 0xBE, 0x04, 0xC3,
+    0xAA, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
+    0x9C, 0x42, 0x50, 0xF4, 0x91, 0xEF, 0x98, 0x7A,
+    0x33, 0x54, 0x0B, 0x43, 0xED, 0xCF, 0xAC, 0x62,
+    0xE4, 0xB3, 0x1C, 0xA9, 0xC9, 0x08, 0xE8, 0x95,
+    0x80, 0xDF, 0x94, 0xFA, 0x75, 0x8F, 0x3F, 0xA6,
+    0x47, 0x07, 0xA7, 0xFC, 0xF3, 0x73, 0x17, 0xBA,
+    0x83, 0x59, 0x3C, 0x19, 0xE6, 0x85, 0x4F, 0xA8,
+    0x68, 0x6B, 0x81, 0xB2, 0x71, 0x64, 0xDA, 0x8B,
+    0xF8, 0xEB, 0x0F, 0x4B, 0x70, 0x56, 0x9D, 0x35,
+    0x1E, 0x24, 0x0E, 0x5E, 0x63, 0x58, 0xD1, 0xA2,
+    0x25, 0x22, 0x7C, 0x3B, 0x01, 0x21, 0x78, 0x87,
+    0xD4, 0x00, 0x46, 0x57, 0x9F, 0xD3, 0x27, 0x52,
+    0x4C, 0x36, 0x02, 0xE7, 0xA0, 0xC4, 0xC8, 0x9E,
+    0xEA, 0xBF, 0x8A, 0xD2, 0x40, 0xC7, 0x38, 0xB5,
+    0xA3, 0xF7, 0xF2, 0xCE, 0xF9, 0x61, 0x15, 0xA1,
+    0xE0, 0xAE, 0x5D, 0xA4, 0x9B, 0x34, 0x1A, 0x55,
+    0xAD, 0x93, 0x32, 0x30, 0xF5, 0x8C, 0xB1, 0xE3,
+    0x1D, 0xF6, 0xE2, 0x2E, 0x82, 0x66, 0xCA, 0x60,
+    0xC0, 0x29, 0x23, 0xAB, 0x0D, 0x53, 0x4E, 0x6F,
+    0xD5, 0xDB, 0x37, 0x45, 0xDE, 0xFD, 0x8E, 0x2F,
+    0x03, 0xFF, 0x6A, 0x72, 0x6D, 0x6C, 0x5B, 0x51,
+    0x8D, 0x1B, 0xAF, 0x92, 0xBB, 0xDD, 0xBC, 0x7F,
+    0x11, 0xD9, 0x5C, 0x41, 0x1F, 0x10, 0x5A, 0xD8,
+    0x0A, 0xC1, 0x31, 0x88, 0xA5, 0xCD, 0x7B, 0xBD,
+    0x2D, 0x74, 0xD0, 0x12, 0xB8, 0xE5, 0xB4, 0xB0,
+    0x89, 0x69, 0x97, 0x4A, 0x0C, 0x96, 0x77, 0x7E,
+    0x65, 0xB9, 0xF1, 0x09, 0xC5, 0x6E, 0xC6, 0x84,
+    0x18, 0xF0, 0x7D, 0xEC, 0x3A, 0xDC, 0x4D, 0x20,
+    0x79, 0xEE, 0x5F, 0x3E, 0xD7, 0xCB, 0x39, 0x48
+}};
+
+u8 AccessSubstitutionBox(u8 index) {
+    return substitution_box[index];
+}
+
+} // namespace Dynarmic::Common::SM4

src/common/sm4.h

@@ -0,0 +1,15 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Dynarmic::Common::SM4 {
+
+u8 AccessSubstitutionBox(u8 index);
+
+} // namespace Dynarmic::Common::SM4

src/frontend/ir/ir_emitter.cpp

@@ -683,6 +683,10 @@ U128 IREmitter::AESMixColumns(const U128& a) {
     return Inst<U128>(Opcode::AESMixColumns, a);
 }
 
+U8 IREmitter::SM4AccessSubstitutionBox(const U8& a) {
+    return Inst<U8>(Opcode::SM4AccessSubstitutionBox, a);
+}
+
 UAny IREmitter::VectorGetElement(size_t esize, const U128& a, size_t index) {
     ASSERT_MSG(esize * index < 128, "Invalid index");
     switch (esize) {

src/frontend/ir/ir_emitter.h

@@ -188,6 +188,8 @@ public:
     U128 AESInverseMixColumns(const U128& a);
     U128 AESMixColumns(const U128& a);
 
+    U8 SM4AccessSubstitutionBox(const U8& a);
+
     UAny VectorGetElement(size_t esize, const U128& a, size_t index);
     U128 VectorSetElement(size_t esize, const U128& a, size_t index, const UAny& elem);
     U128 VectorAbs(size_t esize, const U128& a);

src/frontend/ir/opcodes.inc

@@ -202,6 +202,10 @@ OPCODE(AESDecryptSingleRound,               T::U128,        T::U128
 OPCODE(AESEncryptSingleRound,               T::U128,        T::U128                                         )
 OPCODE(AESInverseMixColumns,                T::U128,        T::U128                                         )
 OPCODE(AESMixColumns,                       T::U128,        T::U128                                         )
+
+// SM4 instructions
+OPCODE(SM4AccessSubstitutionBox,            T::U8,          T::U8                                           )
+
 // Vector instructions
 OPCODE(VectorGetElement8,                   T::U8,          T::U128,        T::U8                           )
 OPCODE(VectorGetElement16,                  T::U16,         T::U128,        T::U8                           )