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- From: peppe@ipgaix.unipg.it (G. Vitillaro)
- Newsgroups: comp.unix.aix
- Subject: Re: Floating-point underflow on IBM3090
- Message-ID: <1992Sep04.184507.153456@ipgaix.unipg.it>
- Date: 4 Sep 92 18:45:07 GMT
- References: <1992Sep4.014404.9417@u.washington.edu>
- Distribution: na
- Organization: Universita' di Perugia
- Lines: 37
-
- quantum@milton.u.washington.edu (Tsung-lung Li) writes:
- >I compiled and ran the following test program.
-
- > program tt
- > double precision x, y
- > x = 1.0d-40
- > y = x * x
- > write(6,*) x, y
- > stop
- > end
-
- >The compilation command I used was "fvs -f'optimize(3)' -o tt tt.f".
- >The followings are what the computer responds.
-
- >0AFB208I VFNTH : PROGRAM INTERRUPT - FLOATING-POINT UNDERFLOW EXCEPTION
- > VFNTH : PSW 07ED1200001001A2, REGISTER CONTAINS 7E4BE2B05D35848D0000000
- >000000000
- > VFNTH : LAST EXECUTED FORTRAN STATEMENT IN PROGRAM TT (OFFSET 00000072)
- >.
- >0TRACEBACK OF CALLING ROUTINES; MODULE ENTRY ADDRESS = 00100130.
- > -----------------------------------------------------------------------------
- > TT (00100130) CALLED BY OPERATING SYSTEM.
- > -----------------------------------------------------------------------------
- >0STANDARD CORRECTIVE ACTION TAKEN. EXECUTION CONTINUING.
- > 0.100000000000000001E-39 0.000000000000000000E+00
- >0 MESSAGE SUMMARY: MESSAGE NUMBER - COUNT
-
- Did you try to run:
-
- tt -noxuflow,
-
- I think that is what you need. Regards, G.Vitillaro
- --
- Giuseppe Vitillaro - IBM SEMEA | E-Mail : peppe@ipgaix.unipg.it
- University of Perugia Italy | 06100 Perugia Phone:+39.75.585-2200
- ---------------------------------------------------------------------------
- All comments/opinions are mine and don't represent those of IBM
-