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Added FP instruction formats.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52086 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes 2008-06-08 01:39:36 +00:00
parent a8a8f427d6
commit e90ea5e81f
1 changed files with 58 additions and 1 deletions
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59
lib/Target/Mips/MipsInstrFormats.td
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@ -10,7 +10,7 @@
//===----------------------------------------------------------------------===//
// Describe MIPS instructions format
//
// All the possible Mips fields are:
// CPU INSTRUCTION FORMATS
//
// opcode - operation code.
// rs - src reg.
@ -102,3 +102,60 @@ class FJ<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern,
let Inst{25-0} = addr;
}
//===----------------------------------------------------------------------===//
//
// FLOAT POINT INSTRUCTION FORMATS
//
// opcode - operation code.
// fs - src reg.
// ft - dst reg (on a 2 regs instr) or src reg (on a 3 reg instr).
// fd - dst reg, only used on 3 regs instr.
// fmt - double or single precision.
// funct - combined with opcode field give us an operation code.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Format FR instruction class in Mips : <|opcode|fmt|ft|fs|fd|funct|>
//===----------------------------------------------------------------------===//
class FFR<bits<6> op, bits<6> _funct, bits<5> _fmt, dag outs, dag ins,
string asmstr, list<dag> pattern, InstrItinClass itin> :
MipsInst<outs, ins, asmstr, pattern, itin>
{
bits<5> fd;
bits<5> fs;
bits<5> ft;
bits<5> fmt;
bits<6> funct;
let opcode = op;
let funct = _funct;
let fmt = _fmt;
let Inst{25-21} = fmt;
let Inst{20-16} = ft;
let Inst{15-11} = fs;
let Inst{10-6} = fd;
let Inst{5-0} = funct;
}
//===----------------------------------------------------------------------===//
// Format FI instruction class in Mips : <|opcode|fmt|ft|immediate|>
//===----------------------------------------------------------------------===//
class FFI<bits<6> op, bits<5> _fmt, dag outs, dag ins, string asmstr,
list<dag> pattern, InstrItinClass itin>:
MipsInst<outs, ins, asmstr, pattern, itin>
{
bits<5> ft;
bits<5> fmt;
bits<16> imm16;
let opcode = op;
let fmt = _fmt;
let Inst{25-21} = fmt;
let Inst{20-16} = ft;
let Inst{15-0} = imm16;
}