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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.
pull/268/head
Marco Costalba 2015-01-21 19:53:26 +01:00
parent 36f8814aa6
commit 6390a3da94
1 changed files with 3 additions and 0 deletions
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src/types.h
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@ -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>