From 530fccbf272ffe424ae53a464b91db148cc968ae Mon Sep 17 00:00:00 2001
From: mstembera <MissingEmail@email>
Date: Mon, 24 Aug 2020 03:38:01 -0700
Subject: [PATCH] Allow for VNNI256 compilation with g++-8

explicitly pass needed -mavx512f -mavx512bw flags

closes https://github.com/official-stockfish/Stockfish/pull/3061

No functional change
---
 .travis.yml  | 3 +--
 src/Makefile | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index c1e6d6df..092c7f53 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -79,8 +79,7 @@ script:
   - make clean && make -j2 ARCH=x86-64-bmi2 build
   - make clean && make -j2 ARCH=x86-64-avx512 build
   - make clean && make -j2 ARCH=x86-64-vnni512 build
-  # requires gcc 9 or higher
-  - if [[ "$COMPILER" != "g++-8" ]]; make clean && make -j2 ARCH=x86-64-vnni256 build; fi
+  - make clean && make -j2 ARCH=x86-64-vnni256 build
 
   #
   # Check perft and reproducible search
diff --git a/src/Makefile b/src/Makefile
index 228ea851..2e85a144 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -516,7 +516,7 @@ endif
 ifeq ($(vnni256),yes)
 	CXXFLAGS += -DUSE_VNNI
 	ifeq ($(comp),$(filter $(comp),gcc clang mingw))
-		CXXFLAGS += -mavx512vnni -mavx512dq -mavx512vl -mprefer-vector-width=256
+		CXXFLAGS += -mavx512f -mavx512bw -mavx512vnni -mavx512dq -mavx512vl -mprefer-vector-width=256
 	endif
 endif
 
-- 
2.39.2