May 2026 release

Author: walbourn

.nuget/directxmath.nuspec

@@ -8,7 +8,7 @@
         <owners>microsoft,directxtk</owners>
         <summary>DirectXMath is an all inline SIMD C++ linear algebra library for use in games and graphics apps.</summary>
         <description>The DirectXMath API provides SIMD-friendly C++ types and functions for common linear algebra and graphics math operations common to DirectX applications. The library provides optimized versions for Windows 32-bit (x86), Windows 64-bit (x64), and Windows on ARM through SSE2 and ARM-NEON intrinsics support in the Visual Studio compiler.</description>
-        <releaseNotes>Matches the April 2025 release.</releaseNotes>
+        <releaseNotes>Matches the May 2026 release.</releaseNotes>
         <projectUrl>http://go.microsoft.com/fwlink/?LinkID=615560</projectUrl>
         <repository type="git" url="https://github.com/microsoft/DirectXMath.git" />
         <icon>images\icon.jpg</icon>

CHANGELOG.md

@@ -6,6 +6,16 @@ Release available for download on [GitHub](https://github.com/microsoft/DirectXM
 
 ## Release History
 
+### May 2026
+* Defaulted C++20 `operator==` and `operator<=>` added for `XMFLOAT3`
+* Fix C++20 comparison operators for `XMFLOAT3X3`, `XMFLOAT4X3`, `XMFLOAT3X4`, and `XMFLOAT4X4`
+* SIMD optimized implementations for `XMLoadFloat3SE` and `XMStoreFloat3SE`
+* Minor SSE4.1 optimization for `XMLoadFloat3A`, `XMLoadFloat4x3`, and `XMLoadFloat4x3A`
+* Fix `XMVectorSwizzle` and `XMVectorPermute` for GCC strict-aliasing optimizer
+* C++17 and later use `inline constexpr` for `XMGLOBALCONST` to support C++20 Modules
+* Improved clang for Windows usage of cpuid intrinsics
+* CMake project updates including minimum version 3.21 and additional build switches
+
 ### April 2025 (3.20b)
 * `XM_DEPRECATED` macro uses C++14 ``[[deprecated]]`` standard attribute when supported
 * Cmake project updates with build options for XDSP and SHMath

CMakeLists.txt

@@ -7,7 +7,7 @@ if(POLICY CMP0162)
    cmake_policy(SET CMP0162 NEW)
 endif()
 
-set(DIRECTXMATH_VERSION 3.20)
+set(DIRECTXMATH_VERSION 3.21)
 
 if(WINDOWS_STORE OR (DEFINED XBOX_CONSOLE_TARGET))
   set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")

Inc/DirectXMath.h

@@ -13,7 +13,7 @@
 #error DirectX Math requires C++
 #endif
 
-#define DIRECTX_MATH_VERSION 320
+#define DIRECTX_MATH_VERSION 321
 
 #if defined(_MSC_VER) && (_MSC_VER < 1910)
 #error DirectX Math requires Visual C++ 2017 or later.

README.md

@@ -6,7 +6,7 @@ https://github.com/Microsoft/DirectXMath
 
 Copyright (c) Microsoft Corporation.
 
-## April 2025
+## May 2026
 
 This package contains the DirectXMath library, an all inline SIMD C++ linear algebra library for use in games and graphics apps.