[Issue 16679] New: prefetch on old pentium d results in an illegal instruction
via Digitalmars-d-bugs
digitalmars-d-bugs at puremagic.com
Thu Nov 10 15:15:58 PST 2016
https://issues.dlang.org/show_bug.cgi?id=16679
Issue ID: 16679
Summary: prefetch on old pentium d results in an illegal
instruction
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: regression
Priority: P1
Component: dmd
Assignee: nobody at puremagic.com
Reporter: braddr at puremagic.com
change 09e3fdd31d53fcb96a787a6a9de466a7c1f72ac1, pull request 6188
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) D CPU 3.00GHz
stepping : 4
microcode : 0x6
Before that commit all tests pass. With that change, testxmm fails.
... runnable/testxmm.d (-inline -release -g -O -fPIC)
Test failed. The logged output:
../src/dmd -conf= -m64 -Irunnable -odgenerated/runnable
-ofgenerated/runnable/testxmm_0 runnable/testxmm.d
runnable/testxmm.d(1328): Deprecation: instead of C-style syntax, use D-style
syntax 'ubyte16[1] table'
generated/runnable/testxmm_0
Illegal instruction (core dumped)
==============================
Test failed: expected rc == 0, exited with rc == 132
(gdb) run
Starting program:
/home/braddr/sandbox/at-client/master-test-Linux_64_64/dmd/test/generated/runnable/testxmm_0
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[2, 0, 0, 0, 4, 0, 0, 0, 6, 0, 0, 0, 8, 0, 0, 0]
Program received signal SIGILL, Illegal instruction.
0x000000000041d454 in core.simd.prefetch!(true, 0u).prefetch(const(void)*) ()
(gdb) disass
Dump of assembler code for function
_D4core4simd21__T8prefetchVbi1Vhi0Z8prefetchFNaNbNiNfPxvZv:
0x000000000041d448 <+0>: push %rbp
0x000000000041d449 <+1>: mov %rsp,%rbp
0x000000000041d44c <+4>: sub $0x10,%rsp
0x000000000041d450 <+8>: mov %rdi,-0x8(%rbp)
=> 0x000000000041d454 <+12>: rex.W prefetchw -0x8(%rbp)
0x000000000041d459 <+17>: leaveq
0x000000000041d45a <+18>: retq
End of assembler dump.
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