Update the release notes

Also fixed entry underline for tinyxml2.

diff --git a/cmake/gmxSimdFlags.cmake b/cmake/gmxSimdFlags.cmake
index 3dce16fc942189fc4343d8d4ac891e7f34042c38..c8e9a8e75d3c008db7fe8e5783ac8cfaebd80f4b 100644 (file)
--- a/cmake/gmxSimdFlags.cmake
+++ b/cmake/gmxSimdFlags.cmake
@@ -1,7 +1,7 @@
 #
 # This file is part of the GROMACS molecular simulation package.
 #
-# Copyright (c) 2017,2018,2019, by the GROMACS development team, led by
+# Copyright (c) 2017,2018,2019,2020, by the GROMACS development team, led by
 # Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
 # and including many others, as listed in the AUTHORS file in the
 # top-level source directory and at http://www.gromacs.org.
@@ -239,7 +239,7 @@ function(gmx_find_simd_avx2_flags C_FLAGS_RESULT CXX_FLAGS_RESULT C_FLAGS_VARIAB
 int main(){__m256i x=_mm256_set1_epi32(5);x=_mm256_add_epi32(x,x);return _mm256_movemask_epi8(x);}"
         TOOLCHAIN_C_FLAGS TOOLCHAIN_CXX_FLAGS
         SIMD_AVX2_C_FLAGS SIMD_AVX2_CXX_FLAGS
-        "${TOOLCHAIN_FLAG_FOR_AVX2}" "-mavx2" "/arch:AVX" "-hgnu") # no AVX2-specific flag for MSVC yet
+        "${TOOLCHAIN_FLAG_FOR_AVX2}" "-mavx2" "/arch:AVX2" "-hgnu") 
 
     if(${SIMD_AVX2_C_FLAGS_RESULT})
         set(${C_FLAGS_VARIABLE} "${TOOLCHAIN_C_FLAGS} ${SIMD_AVX2_C_FLAGS}" CACHE INTERNAL "C flags required for AVX2 instructions")
@@ -266,7 +266,7 @@ function(gmx_find_simd_avx_512_flags C_FLAGS_RESULT CXX_FLAGS_RESULT C_FLAGS_VAR
           return idata[0]*(int)(_mm512_cmp_ps_mask(x,y,_CMP_LT_OS));}"
         TOOLCHAIN_C_FLAGS TOOLCHAIN_CXX_FLAGS
         SIMD_AVX_512_C_FLAGS SIMD_AVX_512_CXX_FLAGS
-        "-xCORE-AVX512 -qopt-zmm-usage=high" "-xCORE-AVX512" "-mavx512f -mfma" "-mavx512f" "/arch:AVX" "-hgnu") # no AVX_512F flags known for MSVC yet. ICC should use ZMM if code anyhow uses ZMM
+        "-xCORE-AVX512 -qopt-zmm-usage=high" "-xCORE-AVX512" "-mavx512f -mfma" "-mavx512f" "/arch:AVX512" "-hgnu") #ICC should use ZMM if code anyhow uses ZMM
 
     if(${SIMD_AVX_512_C_FLAGS_RESULT})
         set(${C_FLAGS_VARIABLE} "${TOOLCHAIN_C_FLAGS} ${SIMD_AVX_512_C_FLAGS}" CACHE INTERNAL "C flags required for AVX-512 instructions")

diff --git a/docs/release-notes/2020/2020.3.rst b/docs/release-notes/2020/2020.3.rst
index 858c35ad41436371dbeee2511ca13006bbf61e91..5af9cb49fc8456d019131ede018846e78a074c78 100644 (file)
--- a/docs/release-notes/2020/2020.3.rst
+++ b/docs/release-notes/2020/2020.3.rst
@@ -22,8 +22,12 @@ Fixes for ``gmx`` tools
 Fixes that affect portability
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Update MSVC SIMD flags
+""""""""""""""""""""""
+Newly supported SIMD flags may improve performance on recent x86 running Windows.
+
 Fix error with tinyxml2 linking
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+"""""""""""""""""""""""""""""""
 The signature for linking the external library was wrong.
 
 Miscellaneous