| commit | 6da8da641b6c88c6dc5afdff856213b076df6d59 | |
| author | Brett Simmers <bsimmers@fb.com> | |
| Thu, 18 Dec 2014 21:33:05 +0000 (18 13:33 -0800) | ||
| committer | JoelMarcey <joelm@fb.com> | |
| Fri, 19 Dec 2014 01:15:51 +0000 (18 17:15 -0800) | ||
| tree | 05b20701c319cc2c2d525743b896c7c62a034064 | treesnapshot (tar.gz zip) |
| parent | 3662e95bf5817e896fbffd3c058fa9822f92fc10 | commitdiff |
Fix DecodedInstruction's handling of VEX/XOP prefixes
Summary: A 2 byte VEX prefix implies that m_map_select should be set to 1. I
also added back support for decoding XOP prefixes, with a check to make sure
it's not just an 0x8f one-byte opcode. This allows us to tell LLVM to emit code
for the current CPU without tripping up the decoding we need to do after LLVM
codegen.
Reviewed By: @markw65
Differential Revision: D1748309
Signature: t1:1748309:1418919894:121ed5c97e54b74d9799712ef56efbb4fdd653ca
Summary: A 2 byte VEX prefix implies that m_map_select should be set to 1. I
also added back support for decoding XOP prefixes, with a check to make sure
it's not just an 0x8f one-byte opcode. This allows us to tell LLVM to emit code
for the current CPU without tripping up the decoding we need to do after LLVM
codegen.
Reviewed By: @markw65
Differential Revision: D1748309
Signature: t1:1748309:1418919894:121ed5c97e54b74d9799712ef56efbb4fdd653ca
| hphp/runtime/vm/jit/vasm-llvm.cpp | diffblobblamehistory | |
| hphp/util/asm-x64.cpp | diffblobblamehistory |