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Add support for /0 /1, etc type instructions 

llvm-svn: 4802
This commit is contained in:
Chris Lattner 2002-11-21 17:08:49 +00:00
parent 903a25d225
commit a6eb52fcf7
1 changed files with 16 additions and 5 deletions
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21
llvm/lib/Target/X86/X86InstrInfo.h
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@ -52,24 +52,35 @@ namespace X86II {
/// ///
MRMSrcMem = 6, MRMSrcMem = 6,
/// TODO: Mod/RM that uses a fixed opcode extension, like /0 /// MRMS[0-7][rm] - These forms are used to represent instructions that use
/// a Mod/RM byte, and use the middle field to hold extended opcode
/// information. In the intel manual these are represented as /0, /1, ...
///
FormMask = 7, // First, instructions that operate on a register r/m operand...
MRMS0r = 16, MRMS1r = 17, MRMS2r = 18, MRMS3r = 19, // Format /0 /1 /2 /3
MRMS4r = 20, MRMS5r = 21, MRMS6r = 22, MRMS7r = 23, // Format /4 /5 /6 /7
// Next, instructions that operate on a memory r/m operand...
MRMS0m = 24, MRMS1m = 25, MRMS2m = 26, MRMS3m = 27, // Format /0 /1 /2 /3
MRMS4m = 28, MRMS5m = 29, MRMS6m = 30, MRMS7m = 31, // Format /4 /5 /6 /7
FormMask = 31,
//===------------------------------------------------------------------===// //===------------------------------------------------------------------===//
// Actual flags... // Actual flags...
/// Void - Set if this instruction produces no value /// Void - Set if this instruction produces no value
Void = 1 << 3, Void = 1 << 5,
// TB - TwoByte - Set if this instruction has a two byte opcode, which // TB - TwoByte - Set if this instruction has a two byte opcode, which
// starts with a 0x0F byte before the real opcode. // starts with a 0x0F byte before the real opcode.
TB = 1 << 4, TB = 1 << 6,
// OpSize - Set if this instruction requires an operand size prefix (0x66), // OpSize - Set if this instruction requires an operand size prefix (0x66),
// which most often indicates that the instruction operates on 16 bit data // which most often indicates that the instruction operates on 16 bit data
// instead of 32 bit data. // instead of 32 bit data.
OpSize = 1 << 5, OpSize = 1 << 7,
}; };
} }