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[X86] Mark LDS/LES as not being allowed in 64-bit mode. 

Their opcodes are used as part of the VEX prefix in 64-bit mode. Clearly the disassembler implicitly decoded them as AVX instructions in 64-bit mode, but I think the AsmParser would have encoded them.

llvm-svn: 258793
This commit is contained in:
Craig Topper 2016-01-26 06:10:15 +00:00
parent d6cea14cbb
commit b9c932f26e
1 changed files with 8 additions and 4 deletions
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12
llvm/lib/Target/X86/X86InstrSystem.td
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@ -339,9 +339,11 @@ def POPGS64 : I<0xa9, RawFrm, (outs), (ins),
def LDS16rm : I<0xc5, MRMSrcMem, (outs GR16:$dst), (ins opaque32mem:$src),
"lds{w}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize16;
"lds{w}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize16,
Requires<[Not64BitMode]>;
def LDS32rm : I<0xc5, MRMSrcMem, (outs GR32:$dst), (ins opaque48mem:$src),
"lds{l}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize32;
"lds{l}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize32,
Requires<[Not64BitMode]>;
def LSS16rm : I<0xb2, MRMSrcMem, (outs GR16:$dst), (ins opaque32mem:$src),
"lss{w}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, TB, OpSize16;
@ -351,9 +353,11 @@ def LSS64rm : RI<0xb2, MRMSrcMem, (outs GR64:$dst), (ins opaque80mem:$src),
"lss{q}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, TB;
def LES16rm : I<0xc4, MRMSrcMem, (outs GR16:$dst), (ins opaque32mem:$src),
"les{w}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize16;
"les{w}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize16,
Requires<[Not64BitMode]>;
def LES32rm : I<0xc4, MRMSrcMem, (outs GR32:$dst), (ins opaque48mem:$src),
"les{l}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize32;
"les{l}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, OpSize32,
Requires<[Not64BitMode]>;
def LFS16rm : I<0xb4, MRMSrcMem, (outs GR16:$dst), (ins opaque32mem:$src),
"lfs{w}\t{$src, $dst|$dst, $src}", [], IIC_LXS>, TB, OpSize16;