RESOLVED FIXED 171118
X86-64 assembler doesn't handle xchg with byte register src 
https://bugs.webkit.org/show_bug.cgi?id=171118
Summary X86-64 assembler doesn't handle xchg with byte register src
Michael Saboff
Reported 2017-04-21 10:29:50 PDT
The Intel manual Vol 2A 3-3 shows that byte registers SPL and greater require a REX prefix byte. The is done with the X86Assembler function oneByteOp8(). Use of that function was omitted when the xchg8_*() functions was added.
Attachments
Patch (1.51 KB, patch)
2017-04-21 10:38 PDT, Michael Saboff 		saam: review+
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Radar WebKit Bug Importer
Comment 1 2017-04-21 10:32:14 PDT
<rdar://problem/31760529>
Michael Saboff
Comment 2 2017-04-21 10:38:51 PDT
Created attachment 307746 [details] Patch I did verify that all other byte ops use the *Op8() formatter function.
Michael Saboff
Comment 3 2017-04-21 10:42:33 PDT
I fixed the spelling in the bug title, including the ChangeLog.
Michael Saboff
Comment 4 2017-04-21 11:28:53 PDT
Committed r215618: <http://trac.webkit.org/changeset/215618>
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