On 10/09/2014 10:16 AM, roger wrote: > Thanks, Andreas. > > Just what I needed. > > I see that the decimal.h header files are under /usr/include/4.5/ > Does this mean I can't use them with gcc 4.3?
This decimal.h header file belongs to the C++ standard library and can only be used with libstdc++ as it comes with GCC 4.5 or higher. -Andreas- > > Roger > > On Thu, 2014-10-09 at 09:32 +0200, Andreas Krebbel wrote: > >> On 10/09/2014 08:48 AM, roger wrote: >>> Does anybody have any experience using decimal floating point libraries >>> from C/C++ on Z-Linux? I have installed the libdfp1 library on >>> SLES-11, but can't find any header files or documentation for its use. >>> The requirement we have is for currency transactions according to >>> Generally Accepted Accounting Practices. >> >> Hi, >> >> basic arithmetic with DFP numbers can be done with the language extensions >> provided by GCC without >> libdfp. Use the _Decimal64 and _Decimal128 data types (we don't have >> hardware support for >> _Decimal32) with at least the -march=z10 GCC option to generate DFP hardware >> instructions. For prior >> -march levels a DFP software implementation will be used. >> >> libdfp is only needed if you would like to use printf or math library >> functions (like in libm for >> bfp). The printf functionality in libdfp uses Glibc printf hooks to >> implement additional format >> letters for the existing Glibc printf function. >> >> Also libdfp can provide you with a way to compile applications able to run >> with software and >> hardware DFP decided at runtime depending on the CPU level. >> >> For more details you might want to have a look into our white paper >> available on developerworks: >> http://www.ibm.com/developerworks/linux/linux390/perf/tuning_compiler.html#dfp >> >> Bye, >> >> -Andreas- >> >>> >>> ---------------------------------------------------------------------- >>> For LINUX-390 subscribe / signoff / archive access instructions, >>> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >>> visit >>> http://www.marist.edu/htbin/wlvindex?LINUX-390 >>> ---------------------------------------------------------------------- >>> For more information on Linux on System z, visit >>> http://wiki.linuxvm.org/ >>> >> >> ---------------------------------------------------------------------- >> For LINUX-390 subscribe / signoff / archive access instructions, >> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >> visit >> http://www.marist.edu/htbin/wlvindex?LINUX-390 >> ---------------------------------------------------------------------- >> For more information on Linux on System z, visit >> http://wiki.linuxvm.org/ > > > -- > Roger Evans, Vitec Autodata Norge A/S mob: +47 93 25 92 36 > http://www.autodata.no > > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
