diff --git a/CMakePresets.json b/CMakePresets.json
index 90b680e..7b94cb2 100644
--- a/CMakePresets.json
+++ b/CMakePresets.json
@@ -47,6 +47,15 @@
       "cacheVariables": { "DXMATH_ARCHITECTURE": "arm64" },
       "hidden": true
     },
+    {
+      "name": "ARM64EC",
+      "architecture": {
+        "value": "arm64ec",
+        "strategy": "external"
+      },
+      "cacheVariables": { "DXMATH_ARCHITECTURE": "arm64ec" },
+      "hidden": true
+    },
 
     {
       "name": "Debug",
@@ -149,6 +158,8 @@
     { "name": "arm-Release"  , "description": "MSVC for ARM (Release) - ARM-NEON", "inherits": [ "base", "ARM", "Release", "MSVC" ] },
     { "name": "arm64-Debug"  , "description": "MSVC for ARM64 (Debug) - ARM-NEON", "inherits": [ "base", "ARM64", "Debug", "MSVC" ] },
     { "name": "arm64-Release", "description": "MSVC for ARM64 (Release) - ARM-NEON", "inherits": [ "base", "ARM64", "Release", "MSVC" ] },
+    { "name": "arm64ec-Debug"  , "description": "MSVC for ARM64EC (Debug) - ARM-NEON", "inherits": [ "base", "ARM64EC", "Debug", "MSVC" ], "environment": { "CXXFLAGS": "/arm64EC" } },
+    { "name": "arm64ec-Release", "description": "MSVC for ARM64EC (Release) - ARM-NEON", "inherits": [ "base", "ARM64EC", "Release", "MSVC" ], "environment": { "CXXFLAGS": "/arm64EC" } },
 
     { "name": "x64-Debug-Clang"    , "description": "Clang/LLVM for x64 (Debug) - SSE/SSE2", "inherits": [ "base", "x64", "Debug", "Clang" ] },
     { "name": "x64-Release-Clang"  , "description": "Clang/LLVM for x64 (Release) - SSE/SSE2", "inherits": [ "base", "x64", "Release", "Clang" ] },
diff --git a/Extensions/DirectXMathAVX.h b/Extensions/DirectXMathAVX.h
index 9eaf9eb..24bc9aa 100644
--- a/Extensions/DirectXMathAVX.h
+++ b/Extensions/DirectXMathAVX.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error AVX not supported on ARM platform
 #endif
 
diff --git a/Extensions/DirectXMathAVX2.h b/Extensions/DirectXMathAVX2.h
index afcb5f0..27ec70f 100644
--- a/Extensions/DirectXMathAVX2.h
+++ b/Extensions/DirectXMathAVX2.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error AVX2 not supported on ARM platform
 #endif
 
diff --git a/Extensions/DirectXMathBE.h b/Extensions/DirectXMathBE.h
index b41d9fe..574785f 100644
--- a/Extensions/DirectXMathBE.h
+++ b/Extensions/DirectXMathBE.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if (defined(_M_IX86) || defined(_M_X64) || __i386__ || __x86_64__) && !defined(_M_HYBRID_X86_ARM64)
+#if (defined(_M_IX86) || defined(_M_X64) || __i386__ || __x86_64__) && !defined(_M_HYBRID_X86_ARM64) && !defined(_M_ARM64EC)
 #include <tmmintrin.h>
 #endif
 
diff --git a/Extensions/DirectXMathF16C.h b/Extensions/DirectXMathF16C.h
index 726a894..f61ddbf 100644
--- a/Extensions/DirectXMathF16C.h
+++ b/Extensions/DirectXMathF16C.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error F16C not supported on ARM platform
 #endif
 
diff --git a/Extensions/DirectXMathFMA3.h b/Extensions/DirectXMathFMA3.h
index 03ce1a2..e92f695 100644
--- a/Extensions/DirectXMathFMA3.h
+++ b/Extensions/DirectXMathFMA3.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error FMA3 not supported on ARM platform
 #endif
 
diff --git a/Extensions/DirectXMathFMA4.h b/Extensions/DirectXMathFMA4.h
index ad29ad4..7a162ee 100644
--- a/Extensions/DirectXMathFMA4.h
+++ b/Extensions/DirectXMathFMA4.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error FMA4 not supported on ARM platform
 #endif
 
diff --git a/Extensions/DirectXMathSSE3.h b/Extensions/DirectXMathSSE3.h
index 963ba38..c4e26f2 100644
--- a/Extensions/DirectXMathSSE3.h
+++ b/Extensions/DirectXMathSSE3.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error SSE3 not supported on ARM platform
 #endif
 
diff --git a/Extensions/DirectXMathSSE4.h b/Extensions/DirectXMathSSE4.h
index 58b7a4d..f07cd52 100644
--- a/Extensions/DirectXMathSSE4.h
+++ b/Extensions/DirectXMathSSE4.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
+#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) || __arm__ || __aarch64__
 #error SSE4 not supported on ARM platform
 #endif
 
diff --git a/build/DirectXMath-GitHub-Dev17.yml b/build/DirectXMath-GitHub-Dev17.yml
index fede0dc..5bdceaf 100644
--- a/build/DirectXMath-GitHub-Dev17.yml
+++ b/build/DirectXMath-GitHub-Dev17.yml
@@ -52,6 +52,7 @@ pool:
 
 variables:
   Codeql.Enabled: false
+  VC_PATH: 'C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC'
   GITHUB_PAT: $(GITHUBPUBLICTOKEN)
 
 jobs:
@@ -345,3 +346,179 @@ jobs:
       platform: x64
       configuration: Release
       msbuildArchitecture: x64
+
+- job: CMAKE_BUILD_X64
+  displayName: 'CMake for X64 BUILD_TESTING=ON'
+  timeoutInMinutes: 60
+  workspace:
+    clean: all
+  steps:
+  - checkout: self
+    clean: true
+    fetchTags: false
+  - task: DeleteFiles@1
+    displayName: Delete files from Tests
+    inputs:
+      SourceFolder: Tests
+      Contents: '**'
+      RemoveSourceFolder: true
+      RemoveDotFiles: true
+  - task: CmdLine@2
+    displayName: Fetch Tests
+    inputs:
+      script: git clone --quiet --no-tags https://%GITHUB_PAT%@github.com/walbourn/directxmathtest.git Tests
+      workingDirectory: $(Build.SourcesDirectory)
+      failOnStderr: true
+  - task: CmdLine@2
+    displayName: Setup environment for CMake to use VS
+    inputs:
+      script: |
+        call "$(VC_PATH)\Auxiliary\Build\vcvars64.bat"
+        echo ##vso[task.setvariable variable=WindowsSdkVerBinPath;]%WindowsSdkVerBinPath%
+        echo ##vso[task.prependpath]%VSINSTALLDIR%Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja
+        echo ##vso[task.prependpath]%VCINSTALLDIR%Tools\Llvm\x64\bin
+        echo ##vso[task.prependpath]%WindowsSdkBinPath%x64
+        echo ##vso[task.prependpath]%WindowsSdkVerBinPath%x64
+        echo ##vso[task.prependpath]%VCToolsInstallDir%bin\Hostx64\x64
+        echo ##vso[task.setvariable variable=EXTERNAL_INCLUDE;]%EXTERNAL_INCLUDE%
+        echo ##vso[task.setvariable variable=INCLUDE;]%INCLUDE%
+        echo ##vso[task.setvariable variable=LIB;]%LIB%
+
+  - task: CMake@1
+    displayName: CMake (MSVC; x64-Debug) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=x64-Debug
+  - task: CMake@1
+    displayName: CMake (MSVC; x64-Debug) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/x64-Debug -v
+  - task: CMake@1
+    displayName: CMake (MSVC; x64-Release) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=x64-Release
+  - task: CMake@1
+    displayName: CMake (MSVC; x64-Release) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/x64-Release -v
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; x64-Debug) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=x64-Debug-Clang
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; x64-Debug) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/x64-Debug-Clang -v
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; x64-Release) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=x64-Release-Clang
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; x64-Release) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/x64-Release-Clang -v
+
+- job: CMAKE_BUILD_ARM64
+  displayName: 'CMake for ARM64 BUILD_TESTING=ON'
+  timeoutInMinutes: 60
+  workspace:
+    clean: all
+  steps:
+  - checkout: self
+    clean: true
+    fetchTags: false
+  - task: DeleteFiles@1
+    displayName: Delete files from Tests
+    inputs:
+      SourceFolder: Tests
+      Contents: '**'
+      RemoveSourceFolder: true
+      RemoveDotFiles: true
+  - task: CmdLine@2
+    displayName: Fetch Tests
+    inputs:
+      script: git clone --quiet --no-tags https://%GITHUB_PAT%@github.com/walbourn/directxmathtest.git Tests
+      workingDirectory: $(Build.SourcesDirectory)
+      failOnStderr: true
+  - task: CmdLine@2
+    displayName: Setup environment for CMake to use VS
+    inputs:
+      script: |
+        call "$(VC_PATH)\Auxiliary\Build\vcvarsamd64_arm64.bat"
+        echo ##vso[task.setvariable variable=WindowsSdkVerBinPath;]%WindowsSdkVerBinPath%
+        echo ##vso[task.prependpath]%VSINSTALLDIR%Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja
+        echo ##vso[task.prependpath]%VCINSTALLDIR%Tools\Llvm\x64\bin
+        echo ##vso[task.prependpath]%WindowsSdkBinPath%x64
+        echo ##vso[task.prependpath]%WindowsSdkVerBinPath%x64
+        echo ##vso[task.prependpath]%VCToolsInstallDir%bin\Hostx64\arm64
+        echo ##vso[task.setvariable variable=EXTERNAL_INCLUDE;]%EXTERNAL_INCLUDE%
+        echo ##vso[task.setvariable variable=INCLUDE;]%INCLUDE%
+        echo ##vso[task.setvariable variable=LIB;]%LIB%
+
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64-Debug) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=arm64-Debug
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64-Debug) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/arm64-Debug -v
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64-Release) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=arm64-Release
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64-Release) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/arm64-Release -v
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; arm64-Debug) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=arm64-Debug-Clang
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; arm64-Debug) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/arm64-Debug-Clang -v
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; arm64-Release) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=arm64-Release-Clang
+  - task: CMake@1
+    displayName: CMake (clang/LLVM; arm64-Release) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/arm64-Release-Clang -v
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64ec-Debug) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=arm64ec-Debug
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64ec-Debug) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/arm64ec-Debug -v
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64ec-Release) Config
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --preset=arm64ec-Release
+  - task: CMake@1
+    displayName: CMake (MSVC; arm64ec-Release) Build
+    inputs:
+      cwd: '$(Build.SourcesDirectory)'
+      cmakeArgs: --build out/build/arm64ec-Release -v