Update SDL to the latest source code (2.0.9 + e1e13e154128)

libs/SDL2/include/SDL_cpuinfo.h

@@ -50,12 +50,26 @@
 #elif defined(__MINGW64_VERSION_MAJOR)
 #include <intrin.h>
 #else
-#ifdef __ALTIVEC__
-#if defined(HAVE_ALTIVEC_H) && !defined(__APPLE_ALTIVEC__) && !defined(SDL_DISABLE_ALTIVEC_H)
+/* altivec.h redefining bool causes a number of problems, see bugs 3993 and 4392, so you need to explicitly define SDL_ENABLE_ALTIVEC_H to have it included. */
+#if defined(HAVE_ALTIVEC_H) && defined(__ALTIVEC__) && !defined(__APPLE_ALTIVEC__) && defined(SDL_ENABLE_ALTIVEC_H)
 #include <altivec.h>
-#undef pixel
-#undef bool
 #endif
+#if !defined(SDL_DISABLE_ARM_NEON_H)
+#  if defined(__ARM_NEON)
+#    include <arm_neon.h>
+#  elif defined(__WINDOWS__) || defined(__WINRT__)
+/* Visual Studio doesn't define __ARM_ARCH, but _M_ARM (if set, always 7), and _M_ARM64 (if set, always 1). */
+#    if defined(_M_ARM)
+#      include <armintr.h>
+#      include <arm_neon.h>
+#    endif
+#    if defined (_M_ARM64)
+#      include <armintr.h>
+#      include <arm_neon.h>
+#    endif
+/* Set __ARM_NEON so that it can be used elsewhere, at compile time */
+#    define __ARM_NEON 1
+#  endif
 #endif
 #if defined(__3dNOW__) && !defined(SDL_DISABLE_MM3DNOW_H)
 #include <mm3dnow.h>
@@ -159,6 +173,11 @@ extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
  */
 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
 
+/**
+ *  This function returns true if the CPU has AVX-512F (foundation) features.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX512F(void);
+
 /**
  *  This function returns true if the CPU has NEON (ARM SIMD) features.
  */
@@ -169,7 +188,6 @@ extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
  */
 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
 
-
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus
 }