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[Qemu-devel] [Bug 595906] Re: [ARM] All variants of ADDSUBX, SUBADDX giv
From: |
cmchao |
Subject: |
[Qemu-devel] [Bug 595906] Re: [ARM] All variants of ADDSUBX, SUBADDX give incorrect results |
Date: |
Fri, 18 Jun 2010 17:54:17 -0000 |
The addsub/subadd implemetation is incorrect. The patch can fixed it
and is verified by Chris's test case
** Patch added: "target-arm: fix addsub/subadd implementation"
http://launchpadlibrarian.net/50552359/0001-target-arm-fix-addsub-subadd-implementation.patch
--
[ARM] All variants of ADDSUBX,SUBADDX give incorrect results
https://bugs.launchpad.net/bugs/595906
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Status in QEMU: New
Bug description:
All variants of the ADDSUBX/SUBADDX instructions seem to be implemented
incorrectly, i.e.
MOV r12, #0
LDR r0, =0x18004800
LDR r1, =0x30006000
QADDSUBX r12, r0, r1 ; Should give 0x78001800 - gives 0x4800e800
This happens with latest git HEAD.
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