On Thu, 2 Feb 2006, O. Hartmann wrote:
Bruce Evans schrieb:On Thu, 2 Feb 2006, O. Hartmann wrote: ...Now take a look into <machine/ieeefp.h>, where this function should be declared. Nothing, I can not find this routine, it seems to be 'not available' on my FreeBSD6.1-PRERELEASE AMD64 (no 32Bit compatibility).It was removed for amd64 and never existed for some other arches. It was
[fresetsticky()]
apparently unused when it was removed a year ago. ... % RCS file: /home/ncvs/src/sys/amd64/include/ieeefp.h,v ... % revision 1.13...Thanks a lot. In prior software compilations of GMT on FBSD/AMD64 I commented out the appropriate line in gmt_init.c without any hazardous effects - but I never used GMT that intensive having ever recognozed any malicious side effects.I should contact the guys from Soest/Hawaii asking them for any serious effects commenting out this line on amd64 architectures.
I think it is probably used only for error detection, if at all.
Accumulated IEEE exceptions are supposed to be read using fpgetsticky()
and then cleared using fp[re]setsticky() so that the next set accumulated
can be distinguished from the old set. Applications should now use
fesetexceptflag() instead of fp[re]setsticky().
BTW, the most useful fp* functions other than fp[re]setsticky(), namely
fp{get,set}round(), never worked on ia64 due to the rounding flags
values being misspelled, so there are unlikely to be any portable uses
of the fp* functions in ports. The corresponding fe{get,set}round()
functions work on at least i386, amd64 and ia64.
Bruce
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