Use _BitScanForward on Windows, fallback to __builtin_ctzl otherwise

Fixes: VcDevel#307 Suggested-by: Bruno Manganelli <[email protected]>
amadio · Jun 13, 2022 · 628f5c0 · 628f5c0
1 parent d4b8109
commit 628f5c0
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/Vc/common/iterators.h b/Vc/common/iterators.h
@@ -160,12 +160,10 @@ template <typename V> using ConstIterator = Iterator<const V>;
 
         void nextBit()
         {
-#ifdef Vc_GNU_ASM
-            bit = __builtin_ctzl(mask);
-#elif defined(Vc_MSVC)
+#ifdef Vc_MSVC
             _BitScanForward(&bit, mask);
 #else
-#error "Not implemented yet. Please contact [email protected]"
+            bit = __builtin_ctzl(mask);
 #endif
         }
         void resetLsb()