Document how to enable PEXT with MSVC

When not using Makefile, e.g. with MSVC, if hardware supports BMI2 instructions, then USE_PEXT should be added in project configuration to enable pext support. No functional change.
official-stockfish · Jan 21, 2015 · 6390a3d · 6390a3d
1 parent 36f8814
commit 6390a3d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/types.h b/src/types.h
@@ -33,6 +33,9 @@
 ///
 /// -DUSE_POPCNT  | Add runtime support for use of popcnt asm-instruction. Works
 ///               | only in 64-bit mode and requires hardware with popcnt support.
+///
+/// -DUSE_PEXT    | Add runtime support for use of pext asm-instruction. Works
+///               | only in 64-bit mode and requires hardware with pext support.
 
 #include <cassert>
 #include <cctype>