[gmx-developers] no such instruction compiling master

[David van der Spoel]

Hi,

there may be an issue with compiling the master tree on newer Intel 
CPUs, possibly due to architecture detection?

Using gcc-4.7.2 on:

Model Identifier:	MacBookPro10,2
   Processor Name:	Intel Core i7
   Processor Speed:	2,9 GHz
   Number of Processors:	1
   Total Number of Cores:	2
   L2 Cache (per Core):	256 KB
   L3 Cache:	4 MB


cmake output:
-- Performing Test GNU_AVX_CFLAG
-- Performing Test GNU_AVX_CFLAG - Success
-- Performing Test GNU_AVX_CXXFLAG
-- Performing Test GNU_AVX_CXXFLAG - Success
-- Looking for immintrin.h
-- Looking for immintrin.h - found
-- Looking for x86intrin.h
-- Looking for x86intrin.h - found
-- Enabling 256-bit AVX Gromacs acceleration, and it will help compiler 
optimization.

make output:
[  0%] Building C object 
src/gromacs/CMakeFiles/libgromacs.dir/gmxpreprocess/add_par.c.o
/var/folders/_v/rw8xh1v11bq3n17fq1g__s3c0000gn/T//ccDA0rxn.s:392:no such 
instruction: `vmovss %xmm0, -28(%rbp)'

It seems to compile fine when using SSE4.1.

Any clues?
-- 
David van der Spoel, Ph.D., Professor of Biology
Dept. of Cell & Molec. Biol., Uppsala University.
Box 596, 75124 Uppsala, Sweden. Phone:	+46184714205.
spoel at xray.bmc.uu.se    http://folding.bmc.uu.se