[arm64] Implement jscvt feature check for Windows

Change-Id: I7cf964294304c380fb285eebf1e65b0f84dec1a7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3384233Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#78603}

src/base/cpu.cc

@@ -50,6 +50,8 @@
 #include "src/base/logging.h"
 #include "src/base/platform/wrappers.h"
 #if V8_OS_WIN
+#include <windows.h>
+
 #include "src/base/win32-headers.h"
 #endif
 
@@ -762,6 +764,13 @@ CPU::CPU()
   // user-space.
   has_non_stop_time_stamp_counter_ = true;
 
+  // Defined in winnt.h, but in a newer version of the Windows SDK than the one
+  // that V8 requires, so we must copy the value here.
+  constexpr int PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE = 44;
+
+  has_jscvt_ =
+      IsProcessorFeaturePresent(PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE);
+
 #elif V8_OS_LINUX
   // Try to extract the list of CPU features from ELF hwcaps.
   uint32_t hwcaps = ReadELFHWCaps();