diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index 2fb4f1ea..3fb20a51 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -25,6 +25,10 @@ add_library(robin_map INTERFACE)
 add_library(tsl::robin_map ALIAS robin_map)
 target_include_directories(robin_map SYSTEM INTERFACE "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/robin-map/include>")
 
+# vixl
+
+add_subdirectory(vixl)
+
 # xbyak
 
 if (NOT TARGET xbyak)
diff --git a/externals/README.md b/externals/README.md
index 78d9cd57..c1caca55 100644
--- a/externals/README.md
+++ b/externals/README.md
@@ -6,6 +6,7 @@ This repository uses subtrees to manage some of its externals.
 git remote add externals-fmt https://github.com/fmtlib/fmt.git --no-tags
 git remote add externals-mp https://github.com/MerryMage/mp.git --no-tags
 git remote add externals-robin-map https://github.com/Tessil/robin-map.git --no-tags
+git remote add externals-vixl https://git.linaro.org/arm/vixl.git --no-tags
 git remote add externals-xbyak https://github.com/herumi/xbyak.git --no-tags
 ```
 
@@ -17,9 +18,11 @@ Change `<ref>` to refer to the appropriate git reference.
 git fetch externals-fmt
 git fetch externals-mp
 git fetch externals-robin-map
+git fetch externals-vixl
 git fetch externals-xbyak
 git subtree pull --squash --prefix=externals/fmt externals-fmt <ref>
 git subtree pull --squash --prefix=externals/mp externals-mp <ref>
 git subtree pull --squash --prefix=externals/robin-map externals-robin-map <ref>
+git subtree pull --squash --prefix=externals/vixl/vixl externals-vixl <ref>
 git subtree pull --squash --prefix=externals/xbyak externals-xbyak <ref>
 ```
diff --git a/externals/vixl/CMakeLists.txt b/externals/vixl/CMakeLists.txt
new file mode 100644
index 00000000..0cc5a15b
--- /dev/null
+++ b/externals/vixl/CMakeLists.txt
@@ -0,0 +1,52 @@
+add_library(vixl
+    vixl/src/aarch64/abi-aarch64.h
+    vixl/src/aarch64/assembler-aarch64.cc
+    vixl/src/aarch64/assembler-aarch64.h
+    vixl/src/aarch64/constants-aarch64.h
+    vixl/src/aarch64/cpu-aarch64.cc
+    vixl/src/aarch64/cpu-aarch64.h
+    vixl/src/aarch64/cpu-features-auditor-aarch64.cc
+    vixl/src/aarch64/cpu-features-auditor-aarch64.h
+    vixl/src/aarch64/decoder-aarch64.cc
+    vixl/src/aarch64/decoder-aarch64.h
+    vixl/src/aarch64/decoder-constants-aarch64.h
+    vixl/src/aarch64/disasm-aarch64.cc
+    vixl/src/aarch64/disasm-aarch64.h
+    vixl/src/aarch64/instructions-aarch64.cc
+    vixl/src/aarch64/instructions-aarch64.h
+    vixl/src/aarch64/logic-aarch64.cc
+    vixl/src/aarch64/macro-assembler-aarch64.cc
+    vixl/src/aarch64/macro-assembler-aarch64.h
+    vixl/src/aarch64/operands-aarch64.cc
+    vixl/src/aarch64/operands-aarch64.h
+    vixl/src/aarch64/pointer-auth-aarch64.cc
+    vixl/src/aarch64/simulator-aarch64.cc
+    vixl/src/aarch64/simulator-aarch64.h
+    vixl/src/aarch64/simulator-constants-aarch64.h
+    vixl/src/assembler-base-vixl.h
+    vixl/src/code-buffer-vixl.cc
+    vixl/src/code-buffer-vixl.h
+    vixl/src/code-generation-scopes-vixl.h
+    vixl/src/compiler-intrinsics-vixl.cc
+    vixl/src/compiler-intrinsics-vixl.h
+    vixl/src/cpu-features.cc
+    vixl/src/cpu-features.h
+    vixl/src/globals-vixl.h
+    vixl/src/invalset-vixl.h
+    vixl/src/macro-assembler-interface.h
+    vixl/src/platform-vixl.h
+    vixl/src/pool-manager-impl.h
+    vixl/src/pool-manager.h
+    vixl/src/utils-vixl.cc
+    vixl/src/utils-vixl.h
+)
+target_include_directories(vixl PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/vixl/src)
+target_compile_definitions(vixl PUBLIC VIXL_INCLUDE_TARGET_AARCH64=1)
+if (MSVC)
+    target_compile_options(vixl PUBLIC /Zc:__cplusplus)
+endif()
+if (UNIX AND NOT APPLE)
+    target_compile_definitions(vixl PUBLIC VIXL_CODE_BUFFER_MMAP=1)
+else()
+    target_compile_definitions(vixl PUBLIC VIXL_CODE_BUFFER_MALLOC=1)
+endif()