extern void * memcpy(void *, void *, int );
int test(char *from, char *to)
{
memcpy(from,to,8);
}
Compilation:
mipsel-linux-gnu-gcc -O2 -EB -o test.o -c test.c
Gives output:
00000000 <test>:
0: 88a20003 lwl v0,3(a1)
4: 88a30007 lwl v1,7(a1)
8: 98a20000 lwr v0,0(a1)
c: 98a30004 lwr v1,4(a1)
10: a8820003 swl v0,3(a0)
14: b8820000 swr v0,0(a0)
18: a8830007 swl v1,7(a0)
1c: 03e00008 jr ra
20: b8830004 swr v1,4(a0)
And trying it with:
mips-sgi-irix5-gcc -O2 -EB -o test.o -c test.c
00000000 <test>:
0: 88a20000 lwl v0,0(a1)
4: 88a30004 lwl v1,4(a1)
8: 98a20003 lwr v0,3(a1)
c: 98a30007 lwr v1,7(a1)
10: a8820000 swl v0,0(a0)
14: b8820003 swr v0,3(a0)
18: a8830004 swl v1,4(a0)
1c: 03e00008 jr ra
20: b8830007 swr v1,7(a0)
The second way is the correct one (at least the hardware likes it more).
--
Summary: Using mipsel to compile BigEndian -O2 does not work
Product: gcc
Version: 4.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ondrap at penguin dot cz
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: gcc-4.0.1/configure --host=i686-pc-linux-gnu --
target=mipsel-lin
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: mipsel-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23824
