On Thursday, February 27, 2014 2:19:37 PM UTC+1, fwjmath wrote: > > Hi all, > > I am cooperating with a volunteer computing project (yoyo@home, if anyone > knows it), and I need MPIR to build a performance-crucial application on > Windows that will be run on heterogenous CPU. The last version I built also > uses MPIR, and I am really grateful of all your work. > > This time, since the performance of the arbitrary-precision arithmetic is > extremely important, a fat binary is needed. I downloaded the master branch > from Git, and I used mingw64 on msys as build environment, with the > following option for configure > > ./configure --disable-fft --disable-shared --enable-fat > > The "make" and "make check" were successful, but when compiling the > application, mingw64-g++ hinted that there are duplicated symbols, namely > g?mpn_k8_redc_1 in mpn/bobcat/redc_1.asm and ?mpn_core2_redc_1 in > mpn/sandybridge/redc_1.asm. I did a renaming to get rid of this problem, > and the application compiles. > > But then when I tested it against another build with the following option > > ./configure --disable-fft --disable-shared > > the fat binary is slower by about 10%. Furthermore, comparing to GMP on > cygwin64, there is also a large slowdown. Here are some rough timing: > > msys-mpir-fat ~60min > msys-mpir-nofat ~55min > cygwin64-gmp-nofat ~40min > > I was not able to build MPIR on cygwin, it was more or less stucked when > building libmpn.la with libtool. I have used the --with-system-yasm > option (or else it complains on cygwin-style symbolic links). > Strange, I have been successful for a long time building MPIR on Cygwin64, using the system or MPIR shipped yasm. I'll double check this week-end if nothing went wrong since last time I tried.
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