https://bugs.kde.org/show_bug.cgi?id=495278
Bug ID: 495278
Summary: PowerPC instruction dcbf should allow the L field
values of 4, 6 on ISA 3.0 and earlier, just ignore the
value.
Classification: Developer tools
Product: valgrind
Version: 3.24 GIT
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: vex
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Currently, the dcbf instruction on PowerPC is reporting the dcbf instruction
with L = 6 on ISA 3.0 hardware as an error. The actual hardware accepts L = 6.
The L field is actually only 2 bits on ISA 3.0 so it is technically a 2.
Testing ISA 3.0 "accepts" L = 0 to 3, ISA 3.1 "accepts: L = 0 to 7. Removed
the L field check so valgrind will match the real
hardware. For the purposes of Valgrind the dcbf instruction is a NOP anyway so
it will not change the behavior of Valgrind.
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