lib/Target/X86/X86InstrInfo.cpp

   1 //===- X86InstrInfo.cpp - X86 Instruction Information -----------*- C++ -*-===//
   2 //
   3 // This file contains the X86 implementation of the TargetInstrInfo class.
   4 //
   5 //===----------------------------------------------------------------------===//
   6
   7 #include "X86InstrInfo.h"
   8 #include "X86.h"
   9 #include "llvm/CodeGen/MachineInstr.h"
  10
  11 #define I(ENUM, NAME, BASEOPCODE, FLAGS, TSFLAGS, IMPDEFS, IMPUSES)
  12 #define IMPREGSLIST(NAME, ...) \
  13   static const unsigned NAME[] = { __VA_ARGS__ };
  14 #include "X86InstrInfo.def"
  15
  16
  17 // X86Insts - Turn the InstrInfo.def file into a bunch of instruction
  18 // descriptors
  19 //
  20 static const TargetInstrDescriptor X86Insts[] = {
  21 #define I(ENUM, NAME, BASEOPCODE, FLAGS, TSFLAGS, IMPUSES, IMPDEFS)   \
  22              { NAME,                    \
  23                -1, /* Always vararg */  \
  24                ((TSFLAGS) & X86II::Void) ? -1 : 0,  /* Result is in 0 */ \
  25                0,                                   /* maxImmedConst field */\
  26                false,                               /* immedIsSignExtended */\
  27                0,                                   /* numDelaySlots */\
  28                0,                                   /* latency */\
  29                0,                                   /* schedClass */\
  30                FLAGS,                               /* Flags */\
  31                TSFLAGS,                             /* TSFlags */\
  32                IMPUSES,                             /* ImplicitUses */\
  33                IMPDEFS },                           /* ImplicitDefs */
  34 #include "X86InstrInfo.def"
  35 };
  36
  37 X86InstrInfo::X86InstrInfo()
  38   : TargetInstrInfo(X86Insts, sizeof(X86Insts)/sizeof(X86Insts[0]), 0) {
  39 }
  40
  41
  42 static unsigned char BaseOpcodes[] = {
  43 #define I(ENUM, NAME, BASEOPCODE, FLAGS, TSFLAGS, IMPDEFS, IMPUSES) BASEOPCODE,
  44 #include "X86InstrInfo.def"
  45 };
  46
  47 // getBaseOpcodeFor - This function returns the "base" X86 opcode for the
  48 // specified opcode number.
  49 //
  50 unsigned char X86InstrInfo::getBaseOpcodeFor(unsigned Opcode) const {
  51   assert(Opcode < sizeof(BaseOpcodes)/sizeof(BaseOpcodes[0]) &&
  52          "Opcode out of range!");
  53   return BaseOpcodes[Opcode];
  54 }