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| author | Andreas Konopik <andreas.konopik@efs-auto.de> | 2021-02-11 12:53:29 +0100 |
|---|---|---|
| committer | Bastian Koppelmann <kbastian@mail.uni-paderborn.de> | 2021-03-14 14:41:56 +0100 |
| commit | 9b620609d79ca0e101af024435c5b38b80478969 (patch) | |
| tree | 320d7d0f2514f91cc5f4e3a987cd1a12ec4d0a0a /linux-user/openrisc | |
| parent | 4f293079402ad9cd1eae73c256d7adedc0b897b5 (diff) | |
| download | qemu-9b620609d79ca0e101af024435c5b38b80478969.zip qemu-9b620609d79ca0e101af024435c5b38b80478969.tar.gz qemu-9b620609d79ca0e101af024435c5b38b80478969.tar.bz2 | |
tricore: fixed faulty conditions for extr and imask
According to the TC 1.3.1. Architecture Manual [1; page 174], results are
undefined, if pos + width > 32 and not 31 or if width = 0.
We found this error because of a different behavior between qemu-tricore
and the real tricore processor. For pos + width = 32, qemu-tricore did not
generate any intermediate code and ran into a different state compared to
the real hardware.
[1] https://www.infineon.com/dgdl/tc_v131_instructionset_v138.pdf?fileId=db3a304412b407950112b409b6dd0352
[BK: Add the why to the commit message]
Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Andreas Konopik <andreas.konopik@efs-auto.de>
Signed-off-by: Georg Hofstetter <georg.hofstetter@efs-auto.de>
Signed-off-by: David Brenken <david.brenken@efs-auto.de>
Message-Id: <20210211115329.8984-2-david.brenken@efs-auto.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Diffstat (limited to 'linux-user/openrisc')
0 files changed, 0 insertions, 0 deletions