https://bugs.kde.org/show_bug.cgi?id=359289
Bug ID: 359289
Summary: s390x: popcnt (B9E1) not implemented
Product: valgrind
Version: unspecified
Platform: Other
URL: https://bugzilla.redhat.com/show_bug.cgi?id=1306844
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: vex
Assignee: jsew...@acm.org
Reporter: m...@redhat.com
guest_s390_toIR.c has:
case 0xb9e1: /* POPCNT */ goto unimplemented;
And indeed:
$ cat popcnt.c
int main (int argc, const char **argv)
{
return __builtin_popcountl ((long)argc);
}
$ gcc --version
gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-9)
$ gcc popcnt.c
$ valgrind ./a.out
vex s390->IR: unimplemented insn: B9E1 0011
==2443== valgrind: Unrecognised instruction at address 0x80000564.
==2443== at 0x80000564: main (in /home/mwielaar/a.out)
==2443== Your program just tried to execute an instruction that Valgrind
==2443== did not recognise. There are two possible reasons for this.
==2443== 1. Your program has a bug and erroneously jumped to a non-code
==2443== location. If you are running Memcheck and you just saw a
==2443== warning about a bad jump, it's probably your program's fault.
==2443== 2. The instruction is legitimate but Valgrind doesn't handle it,
==2443== i.e. it's Valgrind's fault. If you think this is the case or
==2443== you are not sure, please let us know and we'll try to fix it.
==2443== Either way, Valgrind will now raise a SIGILL signal which will
==2443== probably kill your program.
==2443==
==2443== Process terminating with default action of signal 4 (SIGILL)
==2443== Illegal opcode at address 0x80000564
==2443== at 0x80000564: main (in /home/mwielaar/a.out)
Dump of assembler code for function main:
0x0000000080000540 <+0>: stmg %r11,%r15,88(%r15)
0x0000000080000546 <+6>: lay %r15,-176(%r15)
0x000000008000054c <+12>: lgr %r11,%r15
0x0000000080000550 <+16>: lgr %r1,%r2
0x0000000080000554 <+20>: stg %r3,160(%r11)
0x000000008000055a <+26>: st %r1,172(%r11)
0x000000008000055e <+30>: lgf %r1,172(%r11)
=> 0x0000000080000564 <+36>: popcnt %r1,%r1
0x0000000080000568 <+40>: sllg %r2,%r1,32
0x000000008000056e <+46>: agr %r1,%r2
0x0000000080000572 <+50>: sllg %r2,%r1,16
0x0000000080000578 <+56>: agr %r1,%r2
0x000000008000057c <+60>: sllg %r2,%r1,8
0x0000000080000582 <+66>: agr %r1,%r2
0x0000000080000586 <+70>: srlg %r1,%r1,56
0x000000008000058c <+76>: lgfr %r1,%r1
0x0000000080000590 <+80>: lgr %r2,%r1
0x0000000080000594 <+84>: lg %r4,288(%r11)
0x000000008000059a <+90>: lmg %r11,%r15,264(%r11)
0x00000000800005a0 <+96>: br %r4
End of assembler dump.
Reproducible: Always
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