http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53771
Bug #: 53771
Summary: inconsistent padding long double: mixture of 96 and
128
Classification: Unclassified
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: johnfchand...@gmail.com
Created attachment 27704
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27704
a sample program exhibiting the bug
Overriding the default padding of REAL*10 data with the -m128bit-long-double or
-m96bit-long-double option does not work consistently. Some data items in I/O
are still padded to the default length instead of the desired length. In the
sample program, the array written to fort.1 via implied-do follows the default
padding instead of obeying the override.
Command:
gfortran -v -m96bit-long-double btest.f
Driving: gfortran -v -m96bit-long-double btest.f -lgfortranbegin -lgfortran -lm
-shared-libgcc
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-libgcj-multifile
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --disable-plugin
--with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --with-cpu=generic
--host=x86_64-redhat-linux
Thread model: posix
gcc version 4.1.2 20080704 (Red Hat 4.1.2-52)
/usr/libexec/gcc/x86_64-redhat-linux/4.1.2/f951 btest.f -ffixed-form -quiet
-dumpbase btest.f -m96bit-long-double -mtune=generic -auxbase btest -version -I
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/finclude -o /tmp/ccfzauZo.s
GNU F95 version 4.1.2 20080704 (Red Hat 4.1.2-52) (x86_64-redhat-linux)
compiled by GNU C version 4.1.2 20080704 (Red Hat 4.1.2-52).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
as -V -Qy -o /tmp/ccEWq1lI.o /tmp/ccfzauZo.s
GNU assembler version 2.17.50.0.6-20.el5 (x86_64-redhat-linux) using BFD
version 2.17.50.0.6-20.el5 20061020
/usr/libexec/gcc/x86_64-redhat-linux/4.1.2/collect2 --eh-frame-hdr -m
elf_x86_64 --hash-style=gnu -dynamic-linker /lib64/ld-linux-x86-64.so.2
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crti.o
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/crtbegin.o
-L/usr/lib/gcc/x86_64-redhat-linux/4.1.2
-L/usr/lib/gcc/x86_64-redhat-linux/4.1.2
-L/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64 /tmp/ccEWq1lI.o -lgfortranbegin -lgfortran -lm -lgcc_s
-lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-redhat-linux/4.1.2/crtend.o
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crtn.o
