http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59691
Bug ID: 59691
Summary: cilk-plus failure on PENTIUM2
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: bernd.edlinger at hotmail dot de
Almost all cilk-plus execution tests fail due to invalid instruction
on PENTIUM2.
Core was generated by `./fib.exe'.
Program terminated with signal 4, Illegal instruction.
#0 0x0036237a in sysdep_save_fp_ctrl_state () from
/home/ed/gnu/gcc-build/i686-pc-linux-gnu/./libcilkrts/.libs/libcilkrts.so.5
(gdb) disass
Dump of assembler code for function sysdep_save_fp_ctrl_state:
0x00362370 <+0>: mov 0x4(%esp),%eax
0x00362374 <+4>: cmpb $0x0,0x3(%eax)
0x00362378 <+8>: je 0x362381 <sysdep_save_fp_ctrl_state+17>
=> 0x0036237a <+10>: stmxcsr 0x28(%eax)
0x0036237e <+14>: fnstsw 0x2c(%eax)
0x00362381 <+17>: repz ret
End of assembler dump.
(gdb) bt
#0 0x0036237a in sysdep_save_fp_ctrl_state () from
/home/ed/gnu/gcc-build/i686-pc-linux-gnu/./libcilkrts/.libs/libcilkrts.so.5
#1 0x00362c5b in __cilkrts_save_fp_ctrl_state () from
/home/ed/gnu/gcc-build/i686-pc-linux-gnu/./libcilkrts/.libs/libcilkrts.so.5
#2 0x08048818 in fib ()
#3 0x0804868b in main ()
cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping : 2
microcode : 0x2a
cpu MHz : 448.819
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
pse36 mmx fxsr
bogomips : 897.63
clflush size : 32
cache_alignment : 32
address sizes : 36 bits physical, 32 bits virtual
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping : 2
microcode : 0x2a
cpu MHz : 448.819
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
pse36 mmx fxsr
bogomips : 897.67
clflush size : 32
cache_alignment : 32
address sizes : 36 bits physical, 32 bits virtual
