Quadruple precision is specified in fortran by the realreal128 module. Is is called extended it is a 10 byte type provided by intel processors. Softfloats code for the extended doubleprecision and quadrupleprecision formats. Quad precision in gfortran generally requires libquadmath library that should be available for most platforms, but maybe not by default. The macintosh osx system i have access to seems to have the kind 10 option, but not the kind. Also, if there are any special ways to compile the file, please let me know that too. Also, fortran output seems to have an extra digit or two, compared to.
Fortran compiler installation instructions for os x. Optional libraries, frameworks and applications for mac os x. Solving multiscale linear programs using the simplex method in. In computing, quadruple precision or quad precision is a binary floating point based. Most of these packages have been compiledtested on several version of os x and xcode tools. Many of the files have new code that works around the mac gfortran. It also promises to attempt following future fortran standards, such as fortran2003. The macintosh osx system i have access to seems to have the kind 10. Feel free to contact me with questions or problems. What is the current status of quadfloat support in fortran. This manual documents the usage of libquadmath, the gcc quadprecision math library application programming interface api. Thus, i keep your email in full below so people understand the context of the reply.
The quad seems off by 1 bit, if fortran uses ieee quad precision. The following options control the details of the fortran dialect accepted by the. On some systems, notably a mac with safari, the browser may. Ieee 754 floatingpoint test software department of mathematics. There are uptodate distributions for some systems only mac os x 10.
As such, it should be backward compatible with fortran77 and fortran90. Quadfloat aka ieee binary128 support was merged into mainline gcc thanks to the efforts of tobias burnus and the gfortran maintainers, and is part of the 4. A highlevel fortran90 interface, supporting both multiprecision real and complex datatypes. Every fortran compiler offers a default real datatype as well as a double precision real data type. The microsoft vc compiler does not support this type and is not seem to support it in the nearest future. In computing, quadruple precision or quad precision is a binary floating pointbased. There are also various tarfiles of gfortran distributions provided at the high performance computing web page. Inside macintosh powerpc numerics archived october 9, 2012, at the. What is the current status of quadfloat support in fortran references.