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From: bording@bnl.gov To: gcc-gnats@gcc.gnu.org Subject: fortran/10188: gcc test.c or g77 test.f -malign-double Date: Sat, 22 Mar 2003 00:56:00 -0000 [thread overview] Message-ID: <20030322005428.28063.qmail@sources.redhat.com> (raw) >Number: 10188 >Category: fortran >Synopsis: gcc test.c or g77 test.f -malign-double >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Sat Mar 22 00:56:00 UTC 2003 >Closed-Date: >Last-Modified: >Originator: bording@bnl.gov >Release: gcc-3.2.7 >Organization: >Environment: Red-Hat 8.0 on Pentium Pro >Description: It seems double precision is not used: ----fortran code---- real a double precision b a = 0.555555555555555555 b = 0.555555555555555555 write(6,1) a write(6,2) b 1 format('real ',f30.28) 2 format('double ',f30.28) end gives : real 0.5555555820465087890625000000 double 0.5555555820465087890625000000 ------C code ----- #include <stdio.h> float a; double b; main() { a = b = 0.555555555555555555; printf("real %.28f\n",a); printf("double %.28f\n",b); } gives: real 0.5555555820465087890625000000 double 0.5555555555555555802271783250 ----- For C double has higher resolution, but for fortran there is no differece. I have tried various compiler flags without luck ! >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2003-03-22 0:56 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-22 0:56 bording [this message] 2003-03-22 1:16 Billinghurst, David (CRTS) 2003-03-22 13:40 toon
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