AVX 256-bit conversion instructions

Add the x86 VEX_L form to handle special cases where VEX_L must be set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108274 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/Target/X86/X86InstrFormats.td b/lib/Target/X86/X86InstrFormats.td
index 97578af..cc3fdf1 100644
--- a/lib/Target/X86/X86InstrFormats.td
+++ b/lib/Target/X86/X86InstrFormats.td
@@ -106,6 +106,7 @@ class VEX    { bit hasVEXPrefix = 1; }
 class VEX_W  { bit hasVEX_WPrefix = 1; }
 class VEX_4V : VEX { bit hasVEX_4VPrefix = 1; }
 class VEX_I8IMM { bit hasVEX_i8ImmReg = 1; }
+class VEX_L  { bit hasVEX_L = 1; }
 
 class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
               string AsmStr, Domain d = GenericDomain>
@@ -138,6 +139,7 @@ class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
   bit hasVEX_4VPrefix = 0;  // Does this inst requires the VEX.VVVV field?
   bit hasVEX_i8ImmReg = 0;  // Does this inst requires the last source register
                             // to be encoded in a immediate field?
+  bit hasVEX_L = 0;         // Does this inst uses large (256-bit) registers?
 
   // TSFlags layout should be kept in sync with X86InstrInfo.h.
   let TSFlags{5-0}   = FormBits;
@@ -155,6 +157,7 @@ class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
   let TSFlags{33}    = hasVEX_WPrefix;
   let TSFlags{34}    = hasVEX_4VPrefix;
   let TSFlags{35}    = hasVEX_i8ImmReg;
+  let TSFlags{36}    = hasVEX_L;
 }
 
 class I<bits<8> o, Format f, dag outs, dag ins, string asm,