CPU: Add AArch32/armv7 recompiler

src/core/CMakeLists.txt

@@ -120,6 +120,13 @@ if(${CPU_ARCH} STREQUAL "x64")
     cpu_recompiler_code_generator_x64.cpp
   )
   message("Building x64 recompiler")
+elseif(${CPU_ARCH} STREQUAL "aarch32")
+  target_compile_definitions(core PRIVATE "WITH_RECOMPILER=1")
+  target_sources(core PRIVATE ${RECOMPILER_SRCS}
+    cpu_recompiler_code_generator_aarch32.cpp
+  )
+  target_link_libraries(core PRIVATE vixl)
+  message("Building AArch32 recompiler")
 elseif(${CPU_ARCH} STREQUAL "aarch64")
   target_compile_definitions(core PRIVATE "WITH_RECOMPILER=1 WITH_FASTMEM=1")
   target_sources(core PRIVATE ${RECOMPILER_SRCS}

src/core/core.vcxproj

@@ -67,6 +67,20 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='DebugFast|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="cpu_recompiler_code_generator_aarch32.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseLTCG|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='DebugFast|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseLTCG|ARM64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='DebugFast|ARM64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseLTCG|x64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='DebugFast|x64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="cpu_recompiler_code_generator_aarch64.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseLTCG|Win32'">true</ExcludedFromBuild>

src/core/core.vcxproj.filters

@@ -50,6 +50,7 @@
     <ClCompile Include="shadergen.cpp" />
     <ClCompile Include="memory_card_image.cpp" />
     <ClCompile Include="analog_joystick.cpp" />
+    <ClCompile Include="cpu_recompiler_code_generator_aarch32.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="types.h" />

src/core/cpu_recompiler_types.h

@@ -12,10 +12,16 @@
 #define XBYAK_NO_OP_NAMES 1
 #include "xbyak.h"
 
+#elif defined(CPU_AARCH32)
+
+#include "vixl/aarch32/constants-aarch32.h"
+#include "vixl/aarch32/instructions-aarch32.h"
+#include "vixl/aarch32/macro-assembler-aarch32.h"
+
 #elif defined(CPU_AARCH64)
 
-#include <vixl/aarch64/constants-aarch64.h>
-#include <vixl/aarch64/macro-assembler-aarch64.h>
+#include "vixl/aarch64/constants-aarch64.h"
+#include "vixl/aarch64/macro-assembler-aarch64.h"
 
 #endif
 
@@ -83,6 +89,25 @@ constexpr u32 CODE_STORAGE_ALIGNMENT = 4096;
 #error Unknown ABI.
 #endif
 
+#elif defined(CPU_AARCH32)
+
+using HostReg = unsigned;
+using CodeEmitter = vixl::aarch32::MacroAssembler;
+using LabelType = vixl::aarch32::Label;
+enum : u32
+{
+  HostReg_Count = vixl::aarch32::kNumberOfRegisters
+};
+constexpr HostReg HostReg_Invalid = static_cast<HostReg>(HostReg_Count);
+constexpr RegSize HostPointerSize = RegSize_32;
+
+// A reasonable "maximum" number of bytes per instruction.
+constexpr u32 MAX_NEAR_HOST_BYTES_PER_INSTRUCTION = 64;
+constexpr u32 MAX_FAR_HOST_BYTES_PER_INSTRUCTION = 128;
+
+// Alignment of code stoarge.
+constexpr u32 CODE_STORAGE_ALIGNMENT = 4096;
+
 #elif defined(CPU_AARCH64)
 
 using HostReg = unsigned;