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(parent: 347a877) | patch
x86-64: Also optimize "clr reg64"
authorH.J. Lu <hjl.tools@gmail.com>
Thu, 8 Mar 2018 14:41:34 +0000 (06:41 -0800)
committerH.J. Lu <hjl.tools@gmail.com>
Thu, 8 Mar 2018 14:41:34 +0000 (06:41 -0800)
commitd3d50934a9101416c3106497d6ea9ce548760253
tree1f8b1ad5d7b7052323ac1a0d51ef61e189a736f2tree
parent347a87745eab23d8427349787bde4a938a1e8c3ecommit | diff
x86-64: Also optimize "clr reg64"

"clr reg" is an alias of "xor reg, reg".  We can encode "clr reg64" as
"xor reg32, reg32".

gas/

* config/tc-i386.c (optimize_encoding): Also encode "clr reg64"
as "xor reg32, reg32".
* testsuite/gas/i386/x86-64-optimize-1.s: Add "clr reg64" tests.
* testsuite/gas/i386/x86-64-optimize-1.d: Updated.

opcodes/

* i386-opc.tbl: Add Optimize to clr.
* i386-tbl.h: Regenerated.
gas/ChangeLog diff | blob | history
gas/config/tc-i386.c diff | blob | history
gas/testsuite/gas/i386/x86-64-optimize-1.d diff | blob | history
gas/testsuite/gas/i386/x86-64-optimize-1.s diff | blob | history
opcodes/ChangeLog diff | blob | history
opcodes/i386-opc.tbl diff | blob | history
opcodes/i386-tbl.h diff | blob | history