I get testsuite failures in mpfr compiling for s390 with
/usr/lib/gcc/s390-suse-linux/4.1.0/cc1 -fpreprocessed mul.i -quiet -dumpbase
mul.c -march=z900 -mtune=z9-109 -m31 -mesa -auxbase mul -O2 -Wall -version
-fmessage-length=0 -fPIC -o mul.s
s390z27:/usr/src/packages/BUILD/mpfr-2.2.0/tests# LD_LIBRARY_PATH=../.libs/ gdb
.libs/tcheck
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This GDB was configured as "s390-suse-linux"...Using host libthread_db library
"/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/src/packages/BUILD/mpfr-2.2.0/tests/.libs/tcheck
Program received signal SIGILL, Illegal instruction.
0x400c0902 in mpfr_mul () from ../.libs/libmpfr.so.1
(gdb) disassemble
...
0x400c08f6 <mpfr_mul+802>: sra %r5,31
0x400c08fa <mpfr_mul+806>: l %r1,0(%r3)
0x400c08fe <mpfr_mul+810>: lr %r4,%r2
0x400c0900 <mpfr_mul+812>: mr %r3,%r1
0x400c0902 <mpfr_mul+814>: nr %r5,%r1
0x400c0904 <mpfr_mul+816>: sra %r1,31
0x400c0908 <mpfr_mul+820>: ar %r5,%r3
0x400c090a <mpfr_mul+822>: nr %r2,%r1
where the only thing I notice is 'mr %r3,%r1' which seems to contradict
the requirement of an even-numbered register for the destination argument.
Note that even with -march=g5 odd-numbered target registers are produced
for mr. I'll attach preprocessed source for mul.i.
--
Summary: mr instruction with odd-numbered register created
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at gcc dot gnu dot org
GCC target triplet: s390-ibm-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27772
