mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
972f5896e4
- Modifications from the last patch included (issues pointed by Evan Cheng are now fixed). - Added more MipsI instructions. - Added more patterns to match branch instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37461 91177308-0d34-0410-b5e6-96231b3b80d8
469 lines
16 KiB
C++
469 lines
16 KiB
C++
//===- MipsInstrInfo.td - Mips Register defs --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Bruno Cardoso Lopes and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Instruction format superclass
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//===----------------------------------------------------------------------===//
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include "MipsInstrFormats.td"
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//===----------------------------------------------------------------------===//
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// Mips profiles and nodes
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//===----------------------------------------------------------------------===//
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// Call
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def SDT_MipsJmpLink : SDTypeProfile<0, 1, [SDTCisVT<0, iPTR>]>;
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def MipsJmpLink : SDNode<"MipsISD::JmpLink",SDT_MipsJmpLink, [SDNPHasChain,
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SDNPOutFlag]>;
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// Hi and Lo nodes are created to let easy manipulation of 16-bit when
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// handling 32-bit immediates. They are used on MipsISelLowering to
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// lower stuff like GlobalAddress, ExternalSymbol, ...
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// This two nodes have nothing to do with Mips Registers Hi and Lo.
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def MipsHi : SDNode<"MipsISD::Hi", SDTIntUnaryOp>;
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def MipsLo : SDNode<"MipsISD::Lo", SDTIntUnaryOp>;
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// Return
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def SDT_MipsRet : SDTypeProfile<0, 1, [SDTCisInt<0>]>;
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def MipsRet : SDNode<"MipsISD::Ret", SDT_MipsRet, [SDNPHasChain,
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SDNPOptInFlag]>;
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// These are target-independent nodes, but have target-specific formats.
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def SDT_MipsCallSeq : SDTypeProfile<0, 1, [SDTCisVT<0, i32>]>;
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def callseq_start : SDNode<"ISD::CALLSEQ_START", SDT_MipsCallSeq,
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[SDNPHasChain, SDNPOutFlag]>;
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def callseq_end : SDNode<"ISD::CALLSEQ_END", SDT_MipsCallSeq,
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[SDNPHasChain, SDNPOutFlag]>;
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// Instruction operand types
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def brtarget : Operand<OtherVT>;
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def calltarget : Operand<i32>;
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def uimm16 : Operand<i32>;
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def simm16 : Operand<i32>;
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def shamt : Operand<i32>;
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// Address operand
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def mem : Operand<i32> {
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let PrintMethod = "printMemOperand";
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let MIOperandInfo = (ops simm16, CPURegs);
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}
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//===----------------------------------------------------------------------===//
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// Mips Patterns and Transformations
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//===----------------------------------------------------------------------===//
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// Transformation Function - get the lower 16 bits.
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def LO16 : SDNodeXForm<imm, [{
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return getI32Imm((unsigned)N->getValue() & 0xFFFF);
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}]>;
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// Transformation Function - get the higher 16 bits.
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def HI16 : SDNodeXForm<imm, [{
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return getI32Imm((unsigned)N->getValue() >> 16);
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}]>;
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// Node immediate fits as 16-bit sign extended on target immediate.
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// e.g. addi, andi
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def immSExt16 : PatLeaf<(imm), [{
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if (N->getValueType(0) == MVT::i32)
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return (int32_t)N->getValue() == (short)N->getValue();
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else
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return (int64_t)N->getValue() == (short)N->getValue();
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}]>;
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// Node immediate fits as 16-bit zero extended on target immediate.
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// The LO16 param means that only the lower 16 bits of the node
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// immediate are caught.
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// e.g. addiu, sltiu
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def immZExt16 : PatLeaf<(imm), [{
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return (uint64_t)N->getValue() == (unsigned short)N->getValue();
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}], LO16>;
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// Node immediate must have only it's 16 high bits set.
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// The HI16 param means that only the higher 16 bits of the node
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// immediate are caught.
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// e.g. lui
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def imm16ShiftedZExt : PatLeaf<(imm), [{
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return (N->getValue() & ~uint64_t(0xFFFF0000)) == 0;
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}], HI16>;
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// shamt field must fit in 5 bits.
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def immZExt5 : PatLeaf<(imm), [{
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return N->getValue() == ((N->getValue()) & 0x1f) ;
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}]>;
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// Mips Address Mode! SDNode frameindex could possibily be a match
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// since load and store instructions from stack used it.
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def addr : ComplexPattern<i32, 2, "SelectAddr", [frameindex], []>;
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//===----------------------------------------------------------------------===//
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// Instructions specific format
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//===----------------------------------------------------------------------===//
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// Arithmetic 3 register operands
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let isCommutable = 1 in
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class ArithR< bits<6> op, bits<6> func, string instr_asm, SDNode OpNode>:
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FR< op,
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func,
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(ops CPURegs:$dst, CPURegs:$b, CPURegs:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (OpNode CPURegs:$b, CPURegs:$c))] >;
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let isCommutable = 1 in
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class ArithOverflowR< bits<6> op, bits<6> func, string instr_asm>:
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FR< op,
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func,
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(ops CPURegs:$dst, CPURegs:$b, CPURegs:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[]>;
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// Arithmetic 2 register operands
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let isCommutable = 1 in
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class ArithI<bits<6> op, string instr_asm, SDNode OpNode,
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Operand Od, PatLeaf imm_type> :
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FI< op,
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(ops CPURegs:$dst, CPURegs:$b, Od:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (OpNode CPURegs:$b, imm_type:$c))] >;
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// Arithmetic Multiply ADD/SUB
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let rd=0 in
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class MArithR<bits<6> func, string instr_asm> :
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FR< 0x1c,
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func,
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(ops CPURegs:$rs, CPURegs:$rt),
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!strconcat(instr_asm, " $rs, $rt"),
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[]>;
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// Logical
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class LogicR<bits<6> func, string instr_asm, SDNode OpNode>:
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FR< 0x00,
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func,
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(ops CPURegs:$dst, CPURegs:$b, CPURegs:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (OpNode CPURegs:$b, CPURegs:$c))] >;
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class LogicI<bits<6> op, string instr_asm, SDNode OpNode>:
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FI< op,
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(ops CPURegs:$dst, CPURegs:$b, uimm16:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (OpNode CPURegs:$b, immSExt16:$c))]>;
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class LogicNOR<bits<6> op, bits<6> func, string instr_asm>:
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FR< op,
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func,
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(ops CPURegs:$dst, CPURegs:$b, CPURegs:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (not (or CPURegs:$b, CPURegs:$c)))] >;
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// Shifts
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let rt = 0 in
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class LogicR_shift_imm<bits<6> func, string instr_asm, SDNode OpNode>:
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FR< 0x00,
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func,
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(ops CPURegs:$dst, CPURegs:$b, shamt:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (OpNode CPURegs:$b, immZExt5:$c))] >;
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class LogicR_shift_reg<bits<6> func, string instr_asm, SDNode OpNode>:
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FR< 0x00,
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func,
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(ops CPURegs:$dst, CPURegs:$b, CPURegs:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (OpNode CPURegs:$b, CPURegs:$c))] >;
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// Load Upper Imediate
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class LoadUpper<bits<6> op, string instr_asm>:
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FI< op,
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(ops CPURegs:$dst, uimm16:$imm),
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!strconcat(instr_asm, " $dst, $imm"),
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[(set CPURegs:$dst, imm16ShiftedZExt:$imm)]>;
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// Memory Load/Store
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let isLoad = 1 in
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class LoadM<bits<6> op, string instr_asm, PatFrag OpNode>:
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FI< op,
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(ops CPURegs:$dst, mem:$addr),
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!strconcat(instr_asm, " $dst, $addr"),
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[(set CPURegs:$dst, (OpNode addr:$addr))]>;
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let isStore = 1 in
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class StoreM<bits<6> op, string instr_asm, PatFrag OpNode>:
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FI< op,
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(ops CPURegs:$dst, mem:$addr),
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!strconcat(instr_asm, " $dst, $addr"),
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[(OpNode CPURegs:$dst, addr:$addr)]>;
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// Conditional Branch
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let isBranch = 1, noResults=1, isTerminator=1 in
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class CBranch<bits<6> op, string instr_asm, PatFrag cond_op>:
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FI< op,
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(ops CPURegs:$a, CPURegs:$b, brtarget:$offset),
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!strconcat(instr_asm, " $a, $b, $offset"),
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[(brcond (cond_op CPURegs:$a, CPURegs:$b), bb:$offset)]>;
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class SetCC_R<bits<6> op, bits<6> func, string instr_asm,
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PatFrag cond_op>:
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FR< op,
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func,
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(ops CPURegs:$dst, CPURegs:$b, CPURegs:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (cond_op CPURegs:$b, CPURegs:$c))]>;
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class SetCC_I<bits<6> op, string instr_asm, PatFrag cond_op,
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Operand Od, PatLeaf imm_type>:
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FI< op,
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(ops CPURegs:$dst, CPURegs:$b, Od:$c),
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!strconcat(instr_asm, " $dst, $b, $c"),
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[(set CPURegs:$dst, (cond_op CPURegs:$b, imm_type:$c))]>;
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// Unconditional branch
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let hasCtrlDep=1, noResults=1, isTerminator=1 in
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class JumpFJ<bits<6> op, string instr_asm>:
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FJ< op,
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(ops brtarget:$target),
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!strconcat(instr_asm, " $target"),
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[(br bb:$target)]>;
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let hasCtrlDep=1, noResults=1, isTerminator=1, rd=0 in
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class JumpFR<bits<6> op, bits<6> func, string instr_asm>:
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FR< op,
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func,
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(ops CPURegs:$target),
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!strconcat(instr_asm, " $target"),
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[]>;
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// Jump and Link (Call)
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let isCall=1 in
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class JumpLink<bits<6> op, string instr_asm>:
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FJ< op,
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(ops calltarget:$target),
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!strconcat(instr_asm, " $target"),
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[(MipsJmpLink imm:$target)]>;
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let isCall=1 in
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class JumpLinkReg<bits<6> op, bits<6> func, string instr_asm>:
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FR< op,
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func,
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(ops CPURegs:$rd, CPURegs:$rs),
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!strconcat(instr_asm, " $rs, $rd"),
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[]>;
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// Mul, Div
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class MulDiv<bits<6> func, string instr_asm>:
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FR< 0x00,
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func,
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(ops CPURegs:$a, CPURegs:$b),
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!strconcat(instr_asm, " $a, $b"),
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[]>;
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// Move from Hi/Lo
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class MoveFromTo<bits<6> func, string instr_asm>:
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FR< 0x00,
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func,
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(ops CPURegs:$dst),
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!strconcat(instr_asm, " $dst"),
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[]>;
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// Count Leading Ones/Zeros in Word
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class CountLeading<bits<6> func, string instr_asm>:
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FR< 0x1c,
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func,
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(ops CPURegs:$dst, CPURegs:$src),
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!strconcat(instr_asm, " $dst, $src"),
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[]>;
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//===----------------------------------------------------------------------===//
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// Pseudo instructions
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//===----------------------------------------------------------------------===//
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class Pseudo<dag ops, string asmstr, list<dag> pattern>:
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MipsInst<ops, asmstr, pattern>;
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// As stack alignment is always done with addiu, we need a 16-bit immediate
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def ADJCALLSTACKDOWN : Pseudo<(ops uimm16:$amt),
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"!ADJCALLSTACKDOWN $amt",
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[(callseq_start imm:$amt)]>, Imp<[SP],[SP]>;
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def ADJCALLSTACKUP : Pseudo<(ops uimm16:$amt),
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"!ADJCALLSTACKUP $amt",
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[(callseq_end imm:$amt)]>, Imp<[SP],[SP]>;
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def IMPLICIT_DEF_CPURegs : Pseudo<(ops CPURegs:$dst),
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"!IMPLICIT_DEF $dst",
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[(set CPURegs:$dst, (undef))]>;
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//===----------------------------------------------------------------------===//
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// Instruction definition
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Mips32 I
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//===----------------------------------------------------------------------===//
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// Arithmetic
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def ADDi : ArithI<0x08, "addi", add, simm16, immZExt16>;
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def ADDiu : ArithI<0x09, "addiu", add, uimm16, immSExt16>;
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def MUL : ArithR<0x1c, 0x02, "mul", mul>;
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def ADDu : ArithR<0x00, 0x21, "addu", add>;
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def SUBu : ArithR<0x00, 0x23, "subu", sub>;
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def ADD : ArithOverflowR<0x00, 0x20, "add">;
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def SUB : ArithOverflowR<0x00, 0x22, "sub">;
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def MADD : MArithR<0x00, "madd">;
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def MADDU : MArithR<0x01, "maddu">;
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def MSUB : MArithR<0x04, "msub">;
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def MSUBU : MArithR<0x05, "msubu">;
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// Logical
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def AND : LogicR<0x24, "and", and>;
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def OR : LogicR<0x25, "or", or>;
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def XOR : LogicR<0x26, "xor", xor>;
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def ANDi : LogicI<0x0c, "andi", and>;
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def ORi : LogicI<0x0d, "ori", or>;
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def XORi : LogicI<0x0e, "xori", xor>;
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def NOR : LogicNOR<0x00, 0x27, "nor">;
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// Shifts
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def SLL : LogicR_shift_imm<0x00, "sll", shl>;
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def SRL : LogicR_shift_imm<0x02, "srl", srl>;
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def SRA : LogicR_shift_imm<0x03, "sra", sra>;
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def SLLV : LogicR_shift_reg<0x04, "sllv", shl>;
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def SRLV : LogicR_shift_reg<0x06, "srlv", srl>;
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def SRAV : LogicR_shift_reg<0x07, "srav", sra>;
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// Load Upper Immediate
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def LUi : LoadUpper<0x0f, "lui">;
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// Load/Store
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def LB : LoadM<0x20, "lb", sextloadi8>;
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def LBu : LoadM<0x24, "lbu", zextloadi8>;
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def LH : LoadM<0x21, "lh", sextloadi16>;
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def LHu : LoadM<0x25, "lhu", zextloadi16>;
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def LW : LoadM<0x23, "lw", load>;
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def SB : StoreM<0x28, "sb", truncstorei8>;
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def SH : StoreM<0x29, "sh", truncstorei16>;
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def SW : StoreM<0x2b, "sw", store>;
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// Conditional Branch
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def BEQ : CBranch<0x04, "beq", seteq>;
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def BNE : CBranch<0x05, "bne", setne>;
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def SLT : SetCC_R<0x00, 0x2a, "slt", setlt>;
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def SLTu : SetCC_R<0x00, 0x2b, "sltu", setult>;
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def SLTi : SetCC_I<0x0a, "slti", setlt, simm16, immSExt16>;
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def SLTiu : SetCC_I<0x0b, "sltiu", setult, uimm16, immZExt16>;
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// Unconditional jump
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def J : JumpFJ<0x02, "j">;
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def JR : JumpFR<0x00, 0x08, "jr">;
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// Jump and Link (Call)
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def JAL : JumpLink<0x03, "jal">;
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def JALR : JumpLinkReg<0x00, 0x09, "jalr">;
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// MulDiv and Move From Hi/Lo operations, have
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// their correpondent SDNodes created on ISelDAG.
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// Special Mul, Div operations
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def MULT : MulDiv<0x18, "mult">;
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def MULTu : MulDiv<0x19, "multu">;
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def DIV : MulDiv<0x1a, "div">;
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def DIVu : MulDiv<0x1b, "divu">;
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// Move From Hi/Lo
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def MFHI : MoveFromTo<0x10, "mfhi">;
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def MFLO : MoveFromTo<0x12, "mflo">;
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def MTHI : MoveFromTo<0x11, "mthi">;
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def MTLO : MoveFromTo<0x13, "mtlo">;
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// Count Leading
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def CLO : CountLeading<0x21, "clo">;
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def CLZ : CountLeading<0x20, "clz">;
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// No operation
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let addr=0 in
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def NOOP : FJ<0, (ops), "nop", []>;
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// Ret instruction - as mips does not have "ret" a
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// jr $ra must be generated.
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let isReturn=1, isTerminator=1, hasDelaySlot=1, noResults=1,
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isBarrier=1, hasCtrlDep=1, rs=0, rt=0, shamt=0 in
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{
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def RET : FR <0x00, 0x02, (ops CPURegs:$target),
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"jr $target", [(MipsRet CPURegs:$target)]>;
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}
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//===----------------------------------------------------------------------===//
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// Arbitrary patterns that map to one or more instructions
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//===----------------------------------------------------------------------===//
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// Small immediates
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def : Pat<(i32 immSExt16:$in),
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(ORi ZERO, imm:$in)>;
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// Arbitrary immediates
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def : Pat<(i32 imm:$imm),
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(ORi (LUi (HI16 imm:$imm)), (LO16 imm:$imm))>;
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// Call
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def : Pat<(MipsJmpLink (i32 tglobaladdr:$dst)),
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(JAL tglobaladdr:$dst)>;
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def : Pat<(MipsJmpLink (i32 texternalsym:$dst)),
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(JAL texternalsym:$dst)>;
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// GlobalAddress, Constant Pool, ExternalSymbol, and JumpTable
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def : Pat<(MipsHi tglobaladdr:$in), (LUi tglobaladdr:$in)>;
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def : Pat<(MipsLo tglobaladdr:$in), (ADDiu ZERO, tglobaladdr:$in)>;
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// When extracting the address from GlobalAddress we
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// need something of the form "addiu $reg, %lo(addr)"
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def : Pat<(add CPURegs:$a, (MipsLo tglobaladdr:$in)),
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(ADDiu CPURegs:$a, tglobaladdr:$in)>;
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// Mips does not have not, so we increase the operation
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def : Pat<(not CPURegs:$in),
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(NOR CPURegs:$in, CPURegs:$in)>;
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// extended load and stores
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def : Pat<(i32 (extloadi8 addr:$src)), (LBu addr:$src)>;
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def : Pat<(i32 (extloadi16 addr:$src)), (LHu addr:$src)>;
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def : Pat<(truncstorei1 CPURegs:$src, addr:$addr),
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(SB CPURegs:$src, addr:$src)>;
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// Conditional branch patterns.
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// cond branches patterns, 2 register operands signed.
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def : Pat<(brcond (setlt CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BNE (SLT CPURegs:$lhs, CPURegs:$rhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setle CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BEQ (SLT CPURegs:$rhs, CPURegs:$lhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setgt CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BNE (SLT CPURegs:$rhs, CPURegs:$lhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setge CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BEQ (SLT CPURegs:$lhs, CPURegs:$rhs), ZERO, bb:$dst)>;
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// cond branches patterns, 2 register operands unsigned.
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def : Pat<(brcond (setult CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BNE (SLTu CPURegs:$lhs, CPURegs:$rhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setule CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BEQ (SLTu CPURegs:$rhs, CPURegs:$lhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setugt CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BNE (SLTu CPURegs:$rhs, CPURegs:$lhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setuge CPURegs:$lhs, CPURegs:$rhs), bb:$dst),
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(BEQ (SLTu CPURegs:$lhs, CPURegs:$rhs), ZERO, bb:$dst)>;
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// cond branches patterns, reg/imm operands signed.
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def : Pat<(brcond (setult CPURegs:$lhs, immSExt16:$rhs), bb:$dst),
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(BNE (SLTi CPURegs:$lhs, immSExt16:$rhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setuge CPURegs:$lhs, immSExt16:$rhs), bb:$dst),
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(BEQ (SLTi CPURegs:$lhs, immSExt16:$rhs), ZERO, bb:$dst)>;
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// cond branches patterns, reg/imm operands unsigned.
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def : Pat<(brcond (setult CPURegs:$lhs, immZExt16:$rhs), bb:$dst),
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(BNE (SLTiu CPURegs:$lhs, immZExt16:$rhs), ZERO, bb:$dst)>;
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def : Pat<(brcond (setuge CPURegs:$lhs, immZExt16:$rhs), bb:$dst),
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(BEQ (SLTiu CPURegs:$lhs, immZExt16:$rhs), ZERO, bb:$dst)>;
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