https://bugs.kde.org/show_bug.cgi?id=460616
Bug ID: 460616
Summary: disInstr(arm64): unhandled instruction
Classification: Developer tools
Product: valgrind
Version: 3.20 GIT
Platform: RedHat Enterprise Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: memcheck
Assignee: jsew...@acm.org
Reporter: edetur...@gmail.com
Target Milestone: ---
Created attachment 152956
--> https://bugs.kde.org/attachment.cgi?id=152956&action=edit
archive containing sdot.c and valgrind output
The instruction is Arm64 SIMD sdot (vector):
https://developer.arm.com/documentation/100069/0609/A64-SIMD-Vector-Instructions/SDOT--vector-
Decoding specification can be found in the Arm Architecture Reference manual:
https://developer.arm.com/documentation/ddi0487/latest
I'm using a machine that supports this instruction. The process does not
receive a SIGILL when I run the program without valgrind
STEPS TO REPRODUCE
1. Compile the attached source file with "gcc -march='armv8.2-a+dotprod' -o
sdot -c sdot.c" with gcc 9
2. Run "valgrind --tool=memcheck sdot"
3. Disassemble at the unhandled instruction address, e.g. "objdump
--disassemble --start-address 0x4006ac --stop-address 0x4006b0 sdot"
Thanks for your help!
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