forked from OSchip/llvm-project
1404 lines
50 KiB
TableGen
1404 lines
50 KiB
TableGen
//===- ARMInstrThumb.td - Thumb support for ARM ------------*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes the Thumb instruction set.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Thumb specific DAG Nodes.
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//
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def ARMtcall : SDNode<"ARMISD::tCALL", SDT_ARMcall,
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[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
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SDNPVariadic]>;
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def imm_sr_XFORM: SDNodeXForm<imm, [{
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unsigned Imm = N->getZExtValue();
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return CurDAG->getTargetConstant((Imm == 32 ? 0 : Imm), MVT::i32);
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}]>;
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def ThumbSRImmAsmOperand: AsmOperandClass { let Name = "ImmThumbSR"; }
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def imm_sr : Operand<i32>, PatLeaf<(imm), [{
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uint64_t Imm = N->getZExtValue();
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return Imm > 0 && Imm <= 32;
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}], imm_sr_XFORM> {
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let PrintMethod = "printThumbSRImm";
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let ParserMatchClass = ThumbSRImmAsmOperand;
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}
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def imm_neg_XFORM : SDNodeXForm<imm, [{
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return CurDAG->getTargetConstant(-(int)N->getZExtValue(), MVT::i32);
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}]>;
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def imm_comp_XFORM : SDNodeXForm<imm, [{
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return CurDAG->getTargetConstant(~((uint32_t)N->getZExtValue()), MVT::i32);
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}]>;
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def imm0_7_neg : PatLeaf<(i32 imm), [{
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return (uint32_t)-N->getZExtValue() < 8;
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}], imm_neg_XFORM>;
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def imm0_255_comp : PatLeaf<(i32 imm), [{
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return ~((uint32_t)N->getZExtValue()) < 256;
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}]>;
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def imm8_255 : ImmLeaf<i32, [{
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return Imm >= 8 && Imm < 256;
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}]>;
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def imm8_255_neg : PatLeaf<(i32 imm), [{
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unsigned Val = -N->getZExtValue();
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return Val >= 8 && Val < 256;
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}], imm_neg_XFORM>;
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// Break imm's up into two pieces: an immediate + a left shift. This uses
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// thumb_immshifted to match and thumb_immshifted_val and thumb_immshifted_shamt
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// to get the val/shift pieces.
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def thumb_immshifted : PatLeaf<(imm), [{
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return ARM_AM::isThumbImmShiftedVal((unsigned)N->getZExtValue());
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}]>;
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def thumb_immshifted_val : SDNodeXForm<imm, [{
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unsigned V = ARM_AM::getThumbImmNonShiftedVal((unsigned)N->getZExtValue());
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return CurDAG->getTargetConstant(V, MVT::i32);
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}]>;
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def thumb_immshifted_shamt : SDNodeXForm<imm, [{
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unsigned V = ARM_AM::getThumbImmValShift((unsigned)N->getZExtValue());
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return CurDAG->getTargetConstant(V, MVT::i32);
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}]>;
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// ADR instruction labels.
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def t_adrlabel : Operand<i32> {
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let EncoderMethod = "getThumbAdrLabelOpValue";
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}
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// Scaled 4 immediate.
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def t_imm0_1020s4_asmoperand: AsmOperandClass { let Name = "Imm0_1020s4"; }
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def t_imm0_1020s4 : Operand<i32> {
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let PrintMethod = "printThumbS4ImmOperand";
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let ParserMatchClass = t_imm0_1020s4_asmoperand;
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let OperandType = "OPERAND_IMMEDIATE";
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}
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def t_imm0_508s4_asmoperand: AsmOperandClass { let Name = "Imm0_508s4"; }
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def t_imm0_508s4 : Operand<i32> {
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let PrintMethod = "printThumbS4ImmOperand";
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let ParserMatchClass = t_imm0_508s4_asmoperand;
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let OperandType = "OPERAND_IMMEDIATE";
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}
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// Define Thumb specific addressing modes.
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let OperandType = "OPERAND_PCREL" in {
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def t_brtarget : Operand<OtherVT> {
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let EncoderMethod = "getThumbBRTargetOpValue";
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let DecoderMethod = "DecodeThumbBROperand";
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}
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def t_bcctarget : Operand<i32> {
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let EncoderMethod = "getThumbBCCTargetOpValue";
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let DecoderMethod = "DecodeThumbBCCTargetOperand";
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}
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def t_cbtarget : Operand<i32> {
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let EncoderMethod = "getThumbCBTargetOpValue";
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let DecoderMethod = "DecodeThumbCmpBROperand";
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}
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def t_bltarget : Operand<i32> {
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let EncoderMethod = "getThumbBLTargetOpValue";
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let DecoderMethod = "DecodeThumbBLTargetOperand";
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}
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def t_blxtarget : Operand<i32> {
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let EncoderMethod = "getThumbBLXTargetOpValue";
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let DecoderMethod = "DecodeThumbBLXOffset";
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}
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}
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// t_addrmode_rr := reg + reg
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//
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def t_addrmode_rr_asm_operand : AsmOperandClass { let Name = "MemThumbRR"; }
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def t_addrmode_rr : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeRR", []> {
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let EncoderMethod = "getThumbAddrModeRegRegOpValue";
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let PrintMethod = "printThumbAddrModeRROperand";
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let DecoderMethod = "DecodeThumbAddrModeRR";
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let ParserMatchClass = t_addrmode_rr_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
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}
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// t_addrmode_rrs := reg + reg
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//
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// We use separate scaled versions because the Select* functions need
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// to explicitly check for a matching constant and return false here so that
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// the reg+imm forms will match instead. This is a horrible way to do that,
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// as it forces tight coupling between the methods, but it's how selectiondag
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// currently works.
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def t_addrmode_rrs1 : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeRI5S1", []> {
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let EncoderMethod = "getThumbAddrModeRegRegOpValue";
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let PrintMethod = "printThumbAddrModeRROperand";
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let DecoderMethod = "DecodeThumbAddrModeRR";
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let ParserMatchClass = t_addrmode_rr_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
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}
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def t_addrmode_rrs2 : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeRI5S2", []> {
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let EncoderMethod = "getThumbAddrModeRegRegOpValue";
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let DecoderMethod = "DecodeThumbAddrModeRR";
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let PrintMethod = "printThumbAddrModeRROperand";
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let ParserMatchClass = t_addrmode_rr_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
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}
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def t_addrmode_rrs4 : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeRI5S4", []> {
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let EncoderMethod = "getThumbAddrModeRegRegOpValue";
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let DecoderMethod = "DecodeThumbAddrModeRR";
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let PrintMethod = "printThumbAddrModeRROperand";
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let ParserMatchClass = t_addrmode_rr_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
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}
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// t_addrmode_is4 := reg + imm5 * 4
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//
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def t_addrmode_is4_asm_operand : AsmOperandClass { let Name = "MemThumbRIs4"; }
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def t_addrmode_is4 : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeImm5S4", []> {
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let EncoderMethod = "getAddrModeISOpValue";
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let DecoderMethod = "DecodeThumbAddrModeIS";
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let PrintMethod = "printThumbAddrModeImm5S4Operand";
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let ParserMatchClass = t_addrmode_is4_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, i32imm:$offsimm);
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}
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// t_addrmode_is2 := reg + imm5 * 2
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//
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def t_addrmode_is2_asm_operand : AsmOperandClass { let Name = "MemThumbRIs2"; }
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def t_addrmode_is2 : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeImm5S2", []> {
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let EncoderMethod = "getAddrModeISOpValue";
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let DecoderMethod = "DecodeThumbAddrModeIS";
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let PrintMethod = "printThumbAddrModeImm5S2Operand";
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let ParserMatchClass = t_addrmode_is2_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, i32imm:$offsimm);
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}
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// t_addrmode_is1 := reg + imm5
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//
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def t_addrmode_is1_asm_operand : AsmOperandClass { let Name = "MemThumbRIs1"; }
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def t_addrmode_is1 : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeImm5S1", []> {
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let EncoderMethod = "getAddrModeISOpValue";
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let DecoderMethod = "DecodeThumbAddrModeIS";
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let PrintMethod = "printThumbAddrModeImm5S1Operand";
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let ParserMatchClass = t_addrmode_is1_asm_operand;
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let MIOperandInfo = (ops tGPR:$base, i32imm:$offsimm);
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}
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// t_addrmode_sp := sp + imm8 * 4
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//
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// FIXME: This really shouldn't have an explicit SP operand at all. It should
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// be implicit, just like in the instruction encoding itself.
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def t_addrmode_sp_asm_operand : AsmOperandClass { let Name = "MemThumbSPI"; }
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def t_addrmode_sp : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeSP", []> {
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let EncoderMethod = "getAddrModeThumbSPOpValue";
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let DecoderMethod = "DecodeThumbAddrModeSP";
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let PrintMethod = "printThumbAddrModeSPOperand";
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let ParserMatchClass = t_addrmode_sp_asm_operand;
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let MIOperandInfo = (ops GPR:$base, i32imm:$offsimm);
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}
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// t_addrmode_pc := <label> => pc + imm8 * 4
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//
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def t_addrmode_pc : Operand<i32> {
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let EncoderMethod = "getAddrModePCOpValue";
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let DecoderMethod = "DecodeThumbAddrModePC";
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}
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//===----------------------------------------------------------------------===//
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// Miscellaneous Instructions.
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//
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// FIXME: Marking these as hasSideEffects is necessary to prevent machine DCE
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// from removing one half of the matched pairs. That breaks PEI, which assumes
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// these will always be in pairs, and asserts if it finds otherwise. Better way?
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let Defs = [SP], Uses = [SP], hasSideEffects = 1 in {
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def tADJCALLSTACKUP :
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PseudoInst<(outs), (ins i32imm:$amt1, i32imm:$amt2), NoItinerary,
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[(ARMcallseq_end imm:$amt1, imm:$amt2)]>,
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Requires<[IsThumb, IsThumb1Only]>;
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def tADJCALLSTACKDOWN :
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PseudoInst<(outs), (ins i32imm:$amt), NoItinerary,
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[(ARMcallseq_start imm:$amt)]>,
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Requires<[IsThumb, IsThumb1Only]>;
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}
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class T1SystemEncoding<bits<8> opc>
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: T1Encoding<0b101111> {
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let Inst{9-8} = 0b11;
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let Inst{7-0} = opc;
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}
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def tNOP : T1pI<(outs), (ins), NoItinerary, "nop", "", []>,
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T1SystemEncoding<0x00>, // A8.6.110
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Requires<[IsThumb2]>;
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def tYIELD : T1pI<(outs), (ins), NoItinerary, "yield", "", []>,
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T1SystemEncoding<0x10>; // A8.6.410
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def tWFE : T1pI<(outs), (ins), NoItinerary, "wfe", "", []>,
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T1SystemEncoding<0x20>; // A8.6.408
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def tWFI : T1pI<(outs), (ins), NoItinerary, "wfi", "", []>,
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T1SystemEncoding<0x30>; // A8.6.409
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def tSEV : T1pI<(outs), (ins), NoItinerary, "sev", "", []>,
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T1SystemEncoding<0x40>; // A8.6.157
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// The imm operand $val can be used by a debugger to store more information
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// about the breakpoint.
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def tBKPT : T1I<(outs), (ins imm0_255:$val), NoItinerary, "bkpt\t$val",
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[]>,
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T1Encoding<0b101111> {
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let Inst{9-8} = 0b10;
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// A8.6.22
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bits<8> val;
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let Inst{7-0} = val;
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}
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def tSETEND : T1I<(outs), (ins setend_op:$end), NoItinerary, "setend\t$end",
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[]>, T1Encoding<0b101101> {
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bits<1> end;
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// A8.6.156
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let Inst{9-5} = 0b10010;
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let Inst{4} = 1;
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let Inst{3} = end;
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let Inst{2-0} = 0b000;
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}
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// Change Processor State is a system instruction -- for disassembly only.
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def tCPS : T1I<(outs), (ins imod_op:$imod, iflags_op:$iflags),
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NoItinerary, "cps$imod $iflags",
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[/* For disassembly only; pattern left blank */]>,
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T1Misc<0b0110011> {
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// A8.6.38 & B6.1.1
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bit imod;
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bits<3> iflags;
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let Inst{4} = imod;
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let Inst{3} = 0;
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let Inst{2-0} = iflags;
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let DecoderMethod = "DecodeThumbCPS";
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}
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// For both thumb1 and thumb2.
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let isNotDuplicable = 1, isCodeGenOnly = 1 in
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def tPICADD : TIt<(outs GPR:$dst), (ins GPR:$lhs, pclabel:$cp), IIC_iALUr, "",
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[(set GPR:$dst, (ARMpic_add GPR:$lhs, imm:$cp))]>,
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T1Special<{0,0,?,?}> {
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// A8.6.6
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bits<3> dst;
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let Inst{6-3} = 0b1111; // Rm = pc
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let Inst{2-0} = dst;
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}
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// ADD <Rd>, sp, #<imm8>
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// This is rematerializable, which is particularly useful for taking the
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// address of locals.
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let isReMaterializable = 1 in
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def tADDrSPi : T1pI<(outs tGPR:$dst), (ins GPRsp:$sp, t_imm0_1020s4:$imm),
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IIC_iALUi, "add", "\t$dst, $sp, $imm", []>,
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T1Encoding<{1,0,1,0,1,?}> {
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// A6.2 & A8.6.8
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bits<3> dst;
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bits<8> imm;
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let Inst{10-8} = dst;
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let Inst{7-0} = imm;
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let DecoderMethod = "DecodeThumbAddSpecialReg";
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}
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// ADD sp, sp, #<imm7>
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def tADDspi : T1pIt<(outs GPRsp:$Rdn), (ins GPRsp:$Rn, t_imm0_508s4:$imm),
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IIC_iALUi, "add", "\t$Rdn, $imm", []>,
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T1Misc<{0,0,0,0,0,?,?}> {
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// A6.2.5 & A8.6.8
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bits<7> imm;
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let Inst{6-0} = imm;
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let DecoderMethod = "DecodeThumbAddSPImm";
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}
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// SUB sp, sp, #<imm7>
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// FIXME: The encoding and the ASM string don't match up.
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def tSUBspi : T1pIt<(outs GPRsp:$Rdn), (ins GPRsp:$Rn, t_imm0_508s4:$imm),
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IIC_iALUi, "sub", "\t$Rdn, $imm", []>,
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T1Misc<{0,0,0,0,1,?,?}> {
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// A6.2.5 & A8.6.214
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bits<7> imm;
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let Inst{6-0} = imm;
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let DecoderMethod = "DecodeThumbAddSPImm";
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}
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// Can optionally specify SP as a three operand instruction.
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def : tInstAlias<"add${p} sp, sp, $imm",
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(tADDspi SP, t_imm0_508s4:$imm, pred:$p)>;
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def : tInstAlias<"sub${p} sp, sp, $imm",
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(tSUBspi SP, t_imm0_508s4:$imm, pred:$p)>;
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// ADD <Rm>, sp
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def tADDrSP : T1pIt<(outs GPR:$Rdn), (ins GPR:$Rn, GPRsp:$sp), IIC_iALUr,
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"add", "\t$Rdn, $sp, $Rn", []>,
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T1Special<{0,0,?,?}> {
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// A8.6.9 Encoding T1
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bits<4> Rdn;
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let Inst{7} = Rdn{3};
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let Inst{6-3} = 0b1101;
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let Inst{2-0} = Rdn{2-0};
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let DecoderMethod = "DecodeThumbAddSPReg";
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}
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// ADD sp, <Rm>
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def tADDspr : T1pIt<(outs GPRsp:$Rdn), (ins GPRsp:$Rn, GPR:$Rm), IIC_iALUr,
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"add", "\t$Rdn, $Rm", []>,
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T1Special<{0,0,?,?}> {
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// A8.6.9 Encoding T2
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bits<4> Rm;
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let Inst{7} = 1;
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let Inst{6-3} = Rm;
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let Inst{2-0} = 0b101;
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let DecoderMethod = "DecodeThumbAddSPReg";
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}
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//===----------------------------------------------------------------------===//
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// Control Flow Instructions.
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//
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// Indirect branches
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let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
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def tBX : TI<(outs), (ins GPR:$Rm, pred:$p), IIC_Br, "bx${p}\t$Rm", []>,
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T1Special<{1,1,0,?}> {
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// A6.2.3 & A8.6.25
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bits<4> Rm;
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let Inst{6-3} = Rm;
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let Inst{2-0} = 0b000;
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}
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}
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let isReturn = 1, isTerminator = 1, isBarrier = 1 in {
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def tBX_RET : tPseudoExpand<(outs), (ins pred:$p), 2, IIC_Br,
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[(ARMretflag)], (tBX LR, pred:$p)>;
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// Alternative return instruction used by vararg functions.
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def tBX_RET_vararg : tPseudoExpand<(outs), (ins tGPR:$Rm, pred:$p),
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2, IIC_Br, [],
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(tBX GPR:$Rm, pred:$p)>;
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}
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// All calls clobber the non-callee saved registers. SP is marked as a use to
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// prevent stack-pointer assignments that appear immediately before calls from
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// potentially appearing dead.
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let isCall = 1,
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// On non-Darwin platforms R9 is callee-saved.
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Defs = [R0, R1, R2, R3, R12, LR, QQQQ0, QQQQ2, QQQQ3, CPSR, FPSCR],
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Uses = [SP] in {
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// Also used for Thumb2
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def tBL : TIx2<0b11110, 0b11, 1,
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(outs), (ins pred:$p, t_bltarget:$func, variable_ops), IIC_Br,
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"bl${p}\t$func",
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[(ARMtcall tglobaladdr:$func)]>,
|
|
Requires<[IsThumb, IsNotDarwin]> {
|
|
bits<22> func;
|
|
let Inst{26} = func{21};
|
|
let Inst{25-16} = func{20-11};
|
|
let Inst{13} = 1;
|
|
let Inst{11} = 1;
|
|
let Inst{10-0} = func{10-0};
|
|
}
|
|
|
|
// ARMv5T and above, also used for Thumb2
|
|
def tBLXi : TIx2<0b11110, 0b11, 0,
|
|
(outs), (ins pred:$p, t_blxtarget:$func, variable_ops), IIC_Br,
|
|
"blx${p}\t$func",
|
|
[(ARMcall tglobaladdr:$func)]>,
|
|
Requires<[IsThumb, HasV5T, IsNotDarwin]> {
|
|
bits<21> func;
|
|
let Inst{25-16} = func{20-11};
|
|
let Inst{13} = 1;
|
|
let Inst{11} = 1;
|
|
let Inst{10-1} = func{10-1};
|
|
let Inst{0} = 0; // func{0} is assumed zero
|
|
}
|
|
|
|
// Also used for Thumb2
|
|
def tBLXr : TI<(outs), (ins pred:$p, GPR:$func, variable_ops), IIC_Br,
|
|
"blx${p}\t$func",
|
|
[(ARMtcall GPR:$func)]>,
|
|
Requires<[IsThumb, HasV5T, IsNotDarwin]>,
|
|
T1Special<{1,1,1,?}> { // A6.2.3 & A8.6.24;
|
|
bits<4> func;
|
|
let Inst{6-3} = func;
|
|
let Inst{2-0} = 0b000;
|
|
}
|
|
|
|
// ARMv4T
|
|
def tBX_CALL : tPseudoInst<(outs), (ins tGPR:$func, variable_ops),
|
|
4, IIC_Br,
|
|
[(ARMcall_nolink tGPR:$func)]>,
|
|
Requires<[IsThumb, IsThumb1Only, IsNotDarwin]>;
|
|
}
|
|
|
|
let isCall = 1,
|
|
// On Darwin R9 is call-clobbered.
|
|
// R7 is marked as a use to prevent frame-pointer assignments from being
|
|
// moved above / below calls.
|
|
Defs = [R0, R1, R2, R3, R9, R12, LR, QQQQ0, QQQQ2, QQQQ3, CPSR, FPSCR],
|
|
Uses = [R7, SP] in {
|
|
// Also used for Thumb2
|
|
def tBLr9 : tPseudoExpand<(outs), (ins pred:$p, t_bltarget:$func, variable_ops),
|
|
4, IIC_Br, [(ARMtcall tglobaladdr:$func)],
|
|
(tBL pred:$p, t_bltarget:$func)>,
|
|
Requires<[IsThumb, IsDarwin]>;
|
|
|
|
// ARMv5T and above, also used for Thumb2
|
|
def tBLXi_r9 : tPseudoExpand<(outs), (ins pred:$p, t_blxtarget:$func, variable_ops),
|
|
4, IIC_Br, [(ARMcall tglobaladdr:$func)],
|
|
(tBLXi pred:$p, t_blxtarget:$func)>,
|
|
Requires<[IsThumb, HasV5T, IsDarwin]>;
|
|
|
|
// Also used for Thumb2
|
|
def tBLXr_r9 : tPseudoExpand<(outs), (ins pred:$p, GPR:$func, variable_ops),
|
|
2, IIC_Br, [(ARMtcall GPR:$func)],
|
|
(tBLXr pred:$p, GPR:$func)>,
|
|
Requires<[IsThumb, HasV5T, IsDarwin]>;
|
|
|
|
// ARMv4T
|
|
def tBXr9_CALL : tPseudoInst<(outs), (ins tGPR:$func, variable_ops),
|
|
4, IIC_Br,
|
|
[(ARMcall_nolink tGPR:$func)]>,
|
|
Requires<[IsThumb, IsThumb1Only, IsDarwin]>;
|
|
}
|
|
|
|
let isBranch = 1, isTerminator = 1, isBarrier = 1 in {
|
|
let isPredicable = 1 in
|
|
def tB : T1I<(outs), (ins t_brtarget:$target), IIC_Br,
|
|
"b\t$target", [(br bb:$target)]>,
|
|
T1Encoding<{1,1,1,0,0,?}> {
|
|
bits<11> target;
|
|
let Inst{10-0} = target;
|
|
}
|
|
|
|
// Far jump
|
|
// Just a pseudo for a tBL instruction. Needed to let regalloc know about
|
|
// the clobber of LR.
|
|
let Defs = [LR] in
|
|
def tBfar : tPseudoExpand<(outs), (ins t_bltarget:$target, pred:$p),
|
|
4, IIC_Br, [], (tBL pred:$p, t_bltarget:$target)>;
|
|
|
|
def tBR_JTr : tPseudoInst<(outs),
|
|
(ins tGPR:$target, i32imm:$jt, i32imm:$id),
|
|
0, IIC_Br,
|
|
[(ARMbrjt tGPR:$target, tjumptable:$jt, imm:$id)]> {
|
|
list<Predicate> Predicates = [IsThumb, IsThumb1Only];
|
|
}
|
|
}
|
|
|
|
// FIXME: should be able to write a pattern for ARMBrcond, but can't use
|
|
// a two-value operand where a dag node expects two operands. :(
|
|
let isBranch = 1, isTerminator = 1 in
|
|
def tBcc : T1I<(outs), (ins t_bcctarget:$target, pred:$p), IIC_Br,
|
|
"b${p}\t$target",
|
|
[/*(ARMbrcond bb:$target, imm:$cc)*/]>,
|
|
T1BranchCond<{1,1,0,1}> {
|
|
bits<4> p;
|
|
bits<8> target;
|
|
let Inst{11-8} = p;
|
|
let Inst{7-0} = target;
|
|
}
|
|
|
|
// Tail calls
|
|
let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1 in {
|
|
// Darwin versions.
|
|
let Defs = [R0, R1, R2, R3, R9, R12, QQQQ0, QQQQ2, QQQQ3, PC],
|
|
Uses = [SP] in {
|
|
// tTAILJMPd: Darwin version uses a Thumb2 branch (no Thumb1 tail calls
|
|
// on Darwin), so it's in ARMInstrThumb2.td.
|
|
def tTAILJMPr : tPseudoExpand<(outs), (ins tcGPR:$dst, variable_ops),
|
|
4, IIC_Br, [],
|
|
(tBX GPR:$dst, (ops 14, zero_reg))>,
|
|
Requires<[IsThumb, IsDarwin]>;
|
|
}
|
|
// Non-Darwin versions (the difference is R9).
|
|
let Defs = [R0, R1, R2, R3, R12, QQQQ0, QQQQ2, QQQQ3, PC],
|
|
Uses = [SP] in {
|
|
def tTAILJMPdND : tPseudoExpand<(outs), (ins t_brtarget:$dst, variable_ops),
|
|
4, IIC_Br, [],
|
|
(tB t_brtarget:$dst)>,
|
|
Requires<[IsThumb, IsNotDarwin]>;
|
|
def tTAILJMPrND : tPseudoExpand<(outs), (ins tcGPR:$dst, variable_ops),
|
|
4, IIC_Br, [],
|
|
(tBX GPR:$dst, (ops 14, zero_reg))>,
|
|
Requires<[IsThumb, IsNotDarwin]>;
|
|
}
|
|
}
|
|
|
|
|
|
// A8.6.218 Supervisor Call (Software Interrupt)
|
|
// A8.6.16 B: Encoding T1
|
|
// If Inst{11-8} == 0b1111 then SEE SVC
|
|
let isCall = 1, Uses = [SP] in
|
|
def tSVC : T1pI<(outs), (ins imm0_255:$imm), IIC_Br,
|
|
"svc", "\t$imm", []>, Encoding16 {
|
|
bits<8> imm;
|
|
let Inst{15-12} = 0b1101;
|
|
let Inst{11-8} = 0b1111;
|
|
let Inst{7-0} = imm;
|
|
}
|
|
|
|
// The assembler uses 0xDEFE for a trap instruction.
|
|
let isBarrier = 1, isTerminator = 1 in
|
|
def tTRAP : TI<(outs), (ins), IIC_Br,
|
|
"trap", [(trap)]>, Encoding16 {
|
|
let Inst = 0xdefe;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Load Store Instructions.
|
|
//
|
|
|
|
// Loads: reg/reg and reg/imm5
|
|
let canFoldAsLoad = 1, isReMaterializable = 1 in
|
|
multiclass thumb_ld_rr_ri_enc<bits<3> reg_opc, bits<4> imm_opc,
|
|
Operand AddrMode_r, Operand AddrMode_i,
|
|
AddrMode am, InstrItinClass itin_r,
|
|
InstrItinClass itin_i, string asm,
|
|
PatFrag opnode> {
|
|
def r : // reg/reg
|
|
T1pILdStEncode<reg_opc,
|
|
(outs tGPR:$Rt), (ins AddrMode_r:$addr),
|
|
am, itin_r, asm, "\t$Rt, $addr",
|
|
[(set tGPR:$Rt, (opnode AddrMode_r:$addr))]>;
|
|
def i : // reg/imm5
|
|
T1pILdStEncodeImm<imm_opc, 1 /* Load */,
|
|
(outs tGPR:$Rt), (ins AddrMode_i:$addr),
|
|
am, itin_i, asm, "\t$Rt, $addr",
|
|
[(set tGPR:$Rt, (opnode AddrMode_i:$addr))]>;
|
|
}
|
|
// Stores: reg/reg and reg/imm5
|
|
multiclass thumb_st_rr_ri_enc<bits<3> reg_opc, bits<4> imm_opc,
|
|
Operand AddrMode_r, Operand AddrMode_i,
|
|
AddrMode am, InstrItinClass itin_r,
|
|
InstrItinClass itin_i, string asm,
|
|
PatFrag opnode> {
|
|
def r : // reg/reg
|
|
T1pILdStEncode<reg_opc,
|
|
(outs), (ins tGPR:$Rt, AddrMode_r:$addr),
|
|
am, itin_r, asm, "\t$Rt, $addr",
|
|
[(opnode tGPR:$Rt, AddrMode_r:$addr)]>;
|
|
def i : // reg/imm5
|
|
T1pILdStEncodeImm<imm_opc, 0 /* Store */,
|
|
(outs), (ins tGPR:$Rt, AddrMode_i:$addr),
|
|
am, itin_i, asm, "\t$Rt, $addr",
|
|
[(opnode tGPR:$Rt, AddrMode_i:$addr)]>;
|
|
}
|
|
|
|
// A8.6.57 & A8.6.60
|
|
defm tLDR : thumb_ld_rr_ri_enc<0b100, 0b0110, t_addrmode_rrs4,
|
|
t_addrmode_is4, AddrModeT1_4,
|
|
IIC_iLoad_r, IIC_iLoad_i, "ldr",
|
|
UnOpFrag<(load node:$Src)>>;
|
|
|
|
// A8.6.64 & A8.6.61
|
|
defm tLDRB : thumb_ld_rr_ri_enc<0b110, 0b0111, t_addrmode_rrs1,
|
|
t_addrmode_is1, AddrModeT1_1,
|
|
IIC_iLoad_bh_r, IIC_iLoad_bh_i, "ldrb",
|
|
UnOpFrag<(zextloadi8 node:$Src)>>;
|
|
|
|
// A8.6.76 & A8.6.73
|
|
defm tLDRH : thumb_ld_rr_ri_enc<0b101, 0b1000, t_addrmode_rrs2,
|
|
t_addrmode_is2, AddrModeT1_2,
|
|
IIC_iLoad_bh_r, IIC_iLoad_bh_i, "ldrh",
|
|
UnOpFrag<(zextloadi16 node:$Src)>>;
|
|
|
|
let AddedComplexity = 10 in
|
|
def tLDRSB : // A8.6.80
|
|
T1pILdStEncode<0b011, (outs tGPR:$Rt), (ins t_addrmode_rr:$addr),
|
|
AddrModeT1_1, IIC_iLoad_bh_r,
|
|
"ldrsb", "\t$Rt, $addr",
|
|
[(set tGPR:$Rt, (sextloadi8 t_addrmode_rr:$addr))]>;
|
|
|
|
let AddedComplexity = 10 in
|
|
def tLDRSH : // A8.6.84
|
|
T1pILdStEncode<0b111, (outs tGPR:$Rt), (ins t_addrmode_rr:$addr),
|
|
AddrModeT1_2, IIC_iLoad_bh_r,
|
|
"ldrsh", "\t$Rt, $addr",
|
|
[(set tGPR:$Rt, (sextloadi16 t_addrmode_rr:$addr))]>;
|
|
|
|
let canFoldAsLoad = 1 in
|
|
def tLDRspi : T1pIs<(outs tGPR:$Rt), (ins t_addrmode_sp:$addr), IIC_iLoad_i,
|
|
"ldr", "\t$Rt, $addr",
|
|
[(set tGPR:$Rt, (load t_addrmode_sp:$addr))]>,
|
|
T1LdStSP<{1,?,?}> {
|
|
bits<3> Rt;
|
|
bits<8> addr;
|
|
let Inst{10-8} = Rt;
|
|
let Inst{7-0} = addr;
|
|
}
|
|
|
|
// Load tconstpool
|
|
// FIXME: Use ldr.n to work around a Darwin assembler bug.
|
|
let canFoldAsLoad = 1, isReMaterializable = 1, isCodeGenOnly = 1 in
|
|
def tLDRpci : T1pIs<(outs tGPR:$Rt), (ins t_addrmode_pc:$addr), IIC_iLoad_i,
|
|
"ldr", ".n\t$Rt, $addr",
|
|
[(set tGPR:$Rt, (load (ARMWrapper tconstpool:$addr)))]>,
|
|
T1Encoding<{0,1,0,0,1,?}> {
|
|
// A6.2 & A8.6.59
|
|
bits<3> Rt;
|
|
bits<8> addr;
|
|
let Inst{10-8} = Rt;
|
|
let Inst{7-0} = addr;
|
|
}
|
|
|
|
// FIXME: Remove this entry when the above ldr.n workaround is fixed.
|
|
// For disassembly use only.
|
|
def tLDRpciDIS : T1pIs<(outs tGPR:$Rt), (ins t_addrmode_pc:$addr), IIC_iLoad_i,
|
|
"ldr", "\t$Rt, $addr",
|
|
[/* disassembly only */]>,
|
|
T1Encoding<{0,1,0,0,1,?}> {
|
|
// A6.2 & A8.6.59
|
|
bits<3> Rt;
|
|
bits<8> addr;
|
|
let Inst{10-8} = Rt;
|
|
let Inst{7-0} = addr;
|
|
}
|
|
|
|
// A8.6.194 & A8.6.192
|
|
defm tSTR : thumb_st_rr_ri_enc<0b000, 0b0110, t_addrmode_rrs4,
|
|
t_addrmode_is4, AddrModeT1_4,
|
|
IIC_iStore_r, IIC_iStore_i, "str",
|
|
BinOpFrag<(store node:$LHS, node:$RHS)>>;
|
|
|
|
// A8.6.197 & A8.6.195
|
|
defm tSTRB : thumb_st_rr_ri_enc<0b010, 0b0111, t_addrmode_rrs1,
|
|
t_addrmode_is1, AddrModeT1_1,
|
|
IIC_iStore_bh_r, IIC_iStore_bh_i, "strb",
|
|
BinOpFrag<(truncstorei8 node:$LHS, node:$RHS)>>;
|
|
|
|
// A8.6.207 & A8.6.205
|
|
defm tSTRH : thumb_st_rr_ri_enc<0b001, 0b1000, t_addrmode_rrs2,
|
|
t_addrmode_is2, AddrModeT1_2,
|
|
IIC_iStore_bh_r, IIC_iStore_bh_i, "strh",
|
|
BinOpFrag<(truncstorei16 node:$LHS, node:$RHS)>>;
|
|
|
|
|
|
def tSTRspi : T1pIs<(outs), (ins tGPR:$Rt, t_addrmode_sp:$addr), IIC_iStore_i,
|
|
"str", "\t$Rt, $addr",
|
|
[(store tGPR:$Rt, t_addrmode_sp:$addr)]>,
|
|
T1LdStSP<{0,?,?}> {
|
|
bits<3> Rt;
|
|
bits<8> addr;
|
|
let Inst{10-8} = Rt;
|
|
let Inst{7-0} = addr;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Load / store multiple Instructions.
|
|
//
|
|
|
|
// These require base address to be written back or one of the loaded regs.
|
|
let neverHasSideEffects = 1 in {
|
|
|
|
let mayLoad = 1, hasExtraDefRegAllocReq = 1 in
|
|
def tLDMIA : T1I<(outs), (ins tGPR:$Rn, pred:$p, reglist:$regs, variable_ops),
|
|
IIC_iLoad_m, "ldm${p}\t$Rn, $regs", []>, T1Encoding<{1,1,0,0,1,?}> {
|
|
bits<3> Rn;
|
|
bits<8> regs;
|
|
let Inst{10-8} = Rn;
|
|
let Inst{7-0} = regs;
|
|
}
|
|
|
|
// Writeback version is just a pseudo, as there's no encoding difference.
|
|
// Writeback happens iff the base register is not in the destination register
|
|
// list.
|
|
def tLDMIA_UPD :
|
|
InstTemplate<AddrModeNone, 0, IndexModeNone, Pseudo, GenericDomain,
|
|
"$Rn = $wb", IIC_iLoad_mu>,
|
|
PseudoInstExpansion<(tLDMIA tGPR:$Rn, pred:$p, reglist:$regs)> {
|
|
let Size = 2;
|
|
let OutOperandList = (outs GPR:$wb);
|
|
let InOperandList = (ins GPR:$Rn, pred:$p, reglist:$regs, variable_ops);
|
|
let Pattern = [];
|
|
let isCodeGenOnly = 1;
|
|
let isPseudo = 1;
|
|
list<Predicate> Predicates = [IsThumb];
|
|
}
|
|
|
|
// There is no non-writeback version of STM for Thumb.
|
|
let mayStore = 1, hasExtraSrcRegAllocReq = 1 in
|
|
def tSTMIA_UPD : Thumb1I<(outs GPR:$wb),
|
|
(ins tGPR:$Rn, pred:$p, reglist:$regs, variable_ops),
|
|
AddrModeNone, 2, IIC_iStore_mu,
|
|
"stm${p}\t$Rn!, $regs", "$Rn = $wb", []>,
|
|
T1Encoding<{1,1,0,0,0,?}> {
|
|
bits<3> Rn;
|
|
bits<8> regs;
|
|
let Inst{10-8} = Rn;
|
|
let Inst{7-0} = regs;
|
|
}
|
|
|
|
} // neverHasSideEffects
|
|
|
|
def : InstAlias<"ldm${p} $Rn!, $regs",
|
|
(tLDMIA tGPR:$Rn, pred:$p, reglist:$regs)>,
|
|
Requires<[IsThumb, IsThumb1Only]>;
|
|
|
|
let mayLoad = 1, Uses = [SP], Defs = [SP], hasExtraDefRegAllocReq = 1 in
|
|
def tPOP : T1I<(outs), (ins pred:$p, reglist:$regs, variable_ops),
|
|
IIC_iPop,
|
|
"pop${p}\t$regs", []>,
|
|
T1Misc<{1,1,0,?,?,?,?}> {
|
|
bits<16> regs;
|
|
let Inst{8} = regs{15};
|
|
let Inst{7-0} = regs{7-0};
|
|
}
|
|
|
|
let mayStore = 1, Uses = [SP], Defs = [SP], hasExtraSrcRegAllocReq = 1 in
|
|
def tPUSH : T1I<(outs), (ins pred:$p, reglist:$regs, variable_ops),
|
|
IIC_iStore_m,
|
|
"push${p}\t$regs", []>,
|
|
T1Misc<{0,1,0,?,?,?,?}> {
|
|
bits<16> regs;
|
|
let Inst{8} = regs{14};
|
|
let Inst{7-0} = regs{7-0};
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Arithmetic Instructions.
|
|
//
|
|
|
|
// Helper classes for encoding T1pI patterns:
|
|
class T1pIDPEncode<bits<4> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1pI<oops, iops, itin, opc, asm, pattern>,
|
|
T1DataProcessing<opA> {
|
|
bits<3> Rm;
|
|
bits<3> Rn;
|
|
let Inst{5-3} = Rm;
|
|
let Inst{2-0} = Rn;
|
|
}
|
|
class T1pIMiscEncode<bits<7> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1pI<oops, iops, itin, opc, asm, pattern>,
|
|
T1Misc<opA> {
|
|
bits<3> Rm;
|
|
bits<3> Rd;
|
|
let Inst{5-3} = Rm;
|
|
let Inst{2-0} = Rd;
|
|
}
|
|
|
|
// Helper classes for encoding T1sI patterns:
|
|
class T1sIDPEncode<bits<4> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1sI<oops, iops, itin, opc, asm, pattern>,
|
|
T1DataProcessing<opA> {
|
|
bits<3> Rd;
|
|
bits<3> Rn;
|
|
let Inst{5-3} = Rn;
|
|
let Inst{2-0} = Rd;
|
|
}
|
|
class T1sIGenEncode<bits<5> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1sI<oops, iops, itin, opc, asm, pattern>,
|
|
T1General<opA> {
|
|
bits<3> Rm;
|
|
bits<3> Rn;
|
|
bits<3> Rd;
|
|
let Inst{8-6} = Rm;
|
|
let Inst{5-3} = Rn;
|
|
let Inst{2-0} = Rd;
|
|
}
|
|
class T1sIGenEncodeImm<bits<5> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1sI<oops, iops, itin, opc, asm, pattern>,
|
|
T1General<opA> {
|
|
bits<3> Rd;
|
|
bits<3> Rm;
|
|
let Inst{5-3} = Rm;
|
|
let Inst{2-0} = Rd;
|
|
}
|
|
|
|
// Helper classes for encoding T1sIt patterns:
|
|
class T1sItDPEncode<bits<4> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1sIt<oops, iops, itin, opc, asm, pattern>,
|
|
T1DataProcessing<opA> {
|
|
bits<3> Rdn;
|
|
bits<3> Rm;
|
|
let Inst{5-3} = Rm;
|
|
let Inst{2-0} = Rdn;
|
|
}
|
|
class T1sItGenEncodeImm<bits<5> opA, dag oops, dag iops, InstrItinClass itin,
|
|
string opc, string asm, list<dag> pattern>
|
|
: T1sIt<oops, iops, itin, opc, asm, pattern>,
|
|
T1General<opA> {
|
|
bits<3> Rdn;
|
|
bits<8> imm8;
|
|
let Inst{10-8} = Rdn;
|
|
let Inst{7-0} = imm8;
|
|
}
|
|
|
|
// Add with carry register
|
|
let isCommutable = 1, Uses = [CPSR] in
|
|
def tADC : // A8.6.2
|
|
T1sItDPEncode<0b0101, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm), IIC_iALUr,
|
|
"adc", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (adde tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// Add immediate
|
|
def tADDi3 : // A8.6.4 T1
|
|
T1sIGenEncodeImm<0b01110, (outs tGPR:$Rd), (ins tGPR:$Rm, imm0_7:$imm3),
|
|
IIC_iALUi,
|
|
"add", "\t$Rd, $Rm, $imm3",
|
|
[(set tGPR:$Rd, (add tGPR:$Rm, imm0_7:$imm3))]> {
|
|
bits<3> imm3;
|
|
let Inst{8-6} = imm3;
|
|
}
|
|
|
|
def tADDi8 : // A8.6.4 T2
|
|
T1sItGenEncodeImm<{1,1,0,?,?}, (outs tGPR:$Rdn),
|
|
(ins tGPR:$Rn, imm0_255:$imm8), IIC_iALUi,
|
|
"add", "\t$Rdn, $imm8",
|
|
[(set tGPR:$Rdn, (add tGPR:$Rn, imm8_255:$imm8))]>;
|
|
|
|
// Add register
|
|
let isCommutable = 1 in
|
|
def tADDrr : // A8.6.6 T1
|
|
T1sIGenEncode<0b01100, (outs tGPR:$Rd), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iALUr,
|
|
"add", "\t$Rd, $Rn, $Rm",
|
|
[(set tGPR:$Rd, (add tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
let neverHasSideEffects = 1 in
|
|
def tADDhirr : T1pIt<(outs GPR:$Rdn), (ins GPR:$Rn, GPR:$Rm), IIC_iALUr,
|
|
"add", "\t$Rdn, $Rm", []>,
|
|
T1Special<{0,0,?,?}> {
|
|
// A8.6.6 T2
|
|
bits<4> Rdn;
|
|
bits<4> Rm;
|
|
let Inst{7} = Rdn{3};
|
|
let Inst{6-3} = Rm;
|
|
let Inst{2-0} = Rdn{2-0};
|
|
}
|
|
|
|
// AND register
|
|
let isCommutable = 1 in
|
|
def tAND : // A8.6.12
|
|
T1sItDPEncode<0b0000, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iBITr,
|
|
"and", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (and tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// ASR immediate
|
|
def tASRri : // A8.6.14
|
|
T1sIGenEncodeImm<{0,1,0,?,?}, (outs tGPR:$Rd), (ins tGPR:$Rm, imm_sr:$imm5),
|
|
IIC_iMOVsi,
|
|
"asr", "\t$Rd, $Rm, $imm5",
|
|
[(set tGPR:$Rd, (sra tGPR:$Rm, (i32 imm_sr:$imm5)))]> {
|
|
bits<5> imm5;
|
|
let Inst{10-6} = imm5;
|
|
}
|
|
|
|
// ASR register
|
|
def tASRrr : // A8.6.15
|
|
T1sItDPEncode<0b0100, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iMOVsr,
|
|
"asr", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (sra tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// BIC register
|
|
def tBIC : // A8.6.20
|
|
T1sItDPEncode<0b1110, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iBITr,
|
|
"bic", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (and tGPR:$Rn, (not tGPR:$Rm)))]>;
|
|
|
|
// CMN register
|
|
let isCompare = 1, Defs = [CPSR] in {
|
|
//FIXME: Disable CMN, as CCodes are backwards from compare expectations
|
|
// Compare-to-zero still works out, just not the relationals
|
|
//def tCMN : // A8.6.33
|
|
// T1pIDPEncode<0b1011, (outs), (ins tGPR:$lhs, tGPR:$rhs),
|
|
// IIC_iCMPr,
|
|
// "cmn", "\t$lhs, $rhs",
|
|
// [(ARMcmp tGPR:$lhs, (ineg tGPR:$rhs))]>;
|
|
|
|
def tCMNz : // A8.6.33
|
|
T1pIDPEncode<0b1011, (outs), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iCMPr,
|
|
"cmn", "\t$Rn, $Rm",
|
|
[(ARMcmpZ tGPR:$Rn, (ineg tGPR:$Rm))]>;
|
|
|
|
} // isCompare = 1, Defs = [CPSR]
|
|
|
|
// CMP immediate
|
|
let isCompare = 1, Defs = [CPSR] in {
|
|
def tCMPi8 : T1pI<(outs), (ins tGPR:$Rn, imm0_255:$imm8), IIC_iCMPi,
|
|
"cmp", "\t$Rn, $imm8",
|
|
[(ARMcmp tGPR:$Rn, imm0_255:$imm8)]>,
|
|
T1General<{1,0,1,?,?}> {
|
|
// A8.6.35
|
|
bits<3> Rn;
|
|
bits<8> imm8;
|
|
let Inst{10-8} = Rn;
|
|
let Inst{7-0} = imm8;
|
|
}
|
|
|
|
// CMP register
|
|
def tCMPr : // A8.6.36 T1
|
|
T1pIDPEncode<0b1010, (outs), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iCMPr,
|
|
"cmp", "\t$Rn, $Rm",
|
|
[(ARMcmp tGPR:$Rn, tGPR:$Rm)]>;
|
|
|
|
def tCMPhir : T1pI<(outs), (ins GPR:$Rn, GPR:$Rm), IIC_iCMPr,
|
|
"cmp", "\t$Rn, $Rm", []>,
|
|
T1Special<{0,1,?,?}> {
|
|
// A8.6.36 T2
|
|
bits<4> Rm;
|
|
bits<4> Rn;
|
|
let Inst{7} = Rn{3};
|
|
let Inst{6-3} = Rm;
|
|
let Inst{2-0} = Rn{2-0};
|
|
}
|
|
} // isCompare = 1, Defs = [CPSR]
|
|
|
|
|
|
// XOR register
|
|
let isCommutable = 1 in
|
|
def tEOR : // A8.6.45
|
|
T1sItDPEncode<0b0001, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iBITr,
|
|
"eor", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (xor tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// LSL immediate
|
|
def tLSLri : // A8.6.88
|
|
T1sIGenEncodeImm<{0,0,0,?,?}, (outs tGPR:$Rd), (ins tGPR:$Rm, imm0_31:$imm5),
|
|
IIC_iMOVsi,
|
|
"lsl", "\t$Rd, $Rm, $imm5",
|
|
[(set tGPR:$Rd, (shl tGPR:$Rm, (i32 imm:$imm5)))]> {
|
|
bits<5> imm5;
|
|
let Inst{10-6} = imm5;
|
|
}
|
|
|
|
// LSL register
|
|
def tLSLrr : // A8.6.89
|
|
T1sItDPEncode<0b0010, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iMOVsr,
|
|
"lsl", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (shl tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// LSR immediate
|
|
def tLSRri : // A8.6.90
|
|
T1sIGenEncodeImm<{0,0,1,?,?}, (outs tGPR:$Rd), (ins tGPR:$Rm, imm_sr:$imm5),
|
|
IIC_iMOVsi,
|
|
"lsr", "\t$Rd, $Rm, $imm5",
|
|
[(set tGPR:$Rd, (srl tGPR:$Rm, (i32 imm_sr:$imm5)))]> {
|
|
bits<5> imm5;
|
|
let Inst{10-6} = imm5;
|
|
}
|
|
|
|
// LSR register
|
|
def tLSRrr : // A8.6.91
|
|
T1sItDPEncode<0b0011, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iMOVsr,
|
|
"lsr", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (srl tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// Move register
|
|
let isMoveImm = 1 in
|
|
def tMOVi8 : T1sI<(outs tGPR:$Rd), (ins imm0_255:$imm8), IIC_iMOVi,
|
|
"mov", "\t$Rd, $imm8",
|
|
[(set tGPR:$Rd, imm0_255:$imm8)]>,
|
|
T1General<{1,0,0,?,?}> {
|
|
// A8.6.96
|
|
bits<3> Rd;
|
|
bits<8> imm8;
|
|
let Inst{10-8} = Rd;
|
|
let Inst{7-0} = imm8;
|
|
}
|
|
// Because we have an explicit tMOVSr below, we need an alias to handle
|
|
// the immediate "movs" form here. Blech.
|
|
def : tInstAlias <"movs $Rdn, $imm",
|
|
(tMOVi8 tGPR:$Rdn, CPSR, imm0_255:$imm, 14, 0)>;
|
|
|
|
// A7-73: MOV(2) - mov setting flag.
|
|
|
|
let neverHasSideEffects = 1 in {
|
|
def tMOVr : Thumb1pI<(outs GPR:$Rd), (ins GPR:$Rm), AddrModeNone,
|
|
2, IIC_iMOVr,
|
|
"mov", "\t$Rd, $Rm", "", []>,
|
|
T1Special<{1,0,?,?}> {
|
|
// A8.6.97
|
|
bits<4> Rd;
|
|
bits<4> Rm;
|
|
let Inst{7} = Rd{3};
|
|
let Inst{6-3} = Rm;
|
|
let Inst{2-0} = Rd{2-0};
|
|
}
|
|
let Defs = [CPSR] in
|
|
def tMOVSr : T1I<(outs tGPR:$Rd), (ins tGPR:$Rm), IIC_iMOVr,
|
|
"movs\t$Rd, $Rm", []>, Encoding16 {
|
|
// A8.6.97
|
|
bits<3> Rd;
|
|
bits<3> Rm;
|
|
let Inst{15-6} = 0b0000000000;
|
|
let Inst{5-3} = Rm;
|
|
let Inst{2-0} = Rd;
|
|
}
|
|
} // neverHasSideEffects
|
|
|
|
// Multiply register
|
|
let isCommutable = 1 in
|
|
def tMUL : // A8.6.105 T1
|
|
Thumb1sI<(outs tGPR:$Rd), (ins tGPR:$Rn, tGPR:$Rm), AddrModeNone, 2,
|
|
IIC_iMUL32, "mul", "\t$Rd, $Rn, $Rm", "$Rm = $Rd",
|
|
[(set tGPR:$Rd, (mul tGPR:$Rn, tGPR:$Rm))]>,
|
|
T1DataProcessing<0b1101> {
|
|
bits<3> Rd;
|
|
bits<3> Rn;
|
|
let Inst{5-3} = Rn;
|
|
let Inst{2-0} = Rd;
|
|
let AsmMatchConverter = "cvtThumbMultiply";
|
|
}
|
|
|
|
def :tInstAlias<"mul${s}${p} $Rdm, $Rn", (tMUL tGPR:$Rdm, s_cc_out:$s, tGPR:$Rn,
|
|
pred:$p)>;
|
|
|
|
// Move inverse register
|
|
def tMVN : // A8.6.107
|
|
T1sIDPEncode<0b1111, (outs tGPR:$Rd), (ins tGPR:$Rn), IIC_iMVNr,
|
|
"mvn", "\t$Rd, $Rn",
|
|
[(set tGPR:$Rd, (not tGPR:$Rn))]>;
|
|
|
|
// Bitwise or register
|
|
let isCommutable = 1 in
|
|
def tORR : // A8.6.114
|
|
T1sItDPEncode<0b1100, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iBITr,
|
|
"orr", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (or tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// Swaps
|
|
def tREV : // A8.6.134
|
|
T1pIMiscEncode<{1,0,1,0,0,0,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"rev", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (bswap tGPR:$Rm))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
def tREV16 : // A8.6.135
|
|
T1pIMiscEncode<{1,0,1,0,0,1,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"rev16", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (rotr (bswap tGPR:$Rm), (i32 16)))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
def tREVSH : // A8.6.136
|
|
T1pIMiscEncode<{1,0,1,0,1,1,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"revsh", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (sra (bswap tGPR:$Rm), (i32 16)))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
// Rotate right register
|
|
def tROR : // A8.6.139
|
|
T1sItDPEncode<0b0111, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iMOVsr,
|
|
"ror", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (rotr tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// Negate register
|
|
def tRSB : // A8.6.141
|
|
T1sIDPEncode<0b1001, (outs tGPR:$Rd), (ins tGPR:$Rn),
|
|
IIC_iALUi,
|
|
"rsb", "\t$Rd, $Rn, #0",
|
|
[(set tGPR:$Rd, (ineg tGPR:$Rn))]>;
|
|
|
|
def : tInstAlias<"neg${s}${p} $Rd, $Rm",
|
|
(tRSB tGPR:$Rd, s_cc_out:$s, tGPR:$Rm, pred:$p)>;
|
|
|
|
// Subtract with carry register
|
|
let Uses = [CPSR] in
|
|
def tSBC : // A8.6.151
|
|
T1sItDPEncode<0b0110, (outs tGPR:$Rdn), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iALUr,
|
|
"sbc", "\t$Rdn, $Rm",
|
|
[(set tGPR:$Rdn, (sube tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// Subtract immediate
|
|
def tSUBi3 : // A8.6.210 T1
|
|
T1sIGenEncodeImm<0b01111, (outs tGPR:$Rd), (ins tGPR:$Rm, i32imm:$imm3),
|
|
IIC_iALUi,
|
|
"sub", "\t$Rd, $Rm, $imm3",
|
|
[(set tGPR:$Rd, (add tGPR:$Rm, imm0_7_neg:$imm3))]> {
|
|
bits<3> imm3;
|
|
let Inst{8-6} = imm3;
|
|
}
|
|
|
|
def tSUBi8 : // A8.6.210 T2
|
|
T1sItGenEncodeImm<{1,1,1,?,?}, (outs tGPR:$Rdn), (ins tGPR:$Rn, i32imm:$imm8),
|
|
IIC_iALUi,
|
|
"sub", "\t$Rdn, $imm8",
|
|
[(set tGPR:$Rdn, (add tGPR:$Rn, imm8_255_neg:$imm8))]>;
|
|
|
|
// Subtract register
|
|
def tSUBrr : // A8.6.212
|
|
T1sIGenEncode<0b01101, (outs tGPR:$Rd), (ins tGPR:$Rn, tGPR:$Rm),
|
|
IIC_iALUr,
|
|
"sub", "\t$Rd, $Rn, $Rm",
|
|
[(set tGPR:$Rd, (sub tGPR:$Rn, tGPR:$Rm))]>;
|
|
|
|
// Sign-extend byte
|
|
def tSXTB : // A8.6.222
|
|
T1pIMiscEncode<{0,0,1,0,0,1,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"sxtb", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (sext_inreg tGPR:$Rm, i8))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
// Sign-extend short
|
|
def tSXTH : // A8.6.224
|
|
T1pIMiscEncode<{0,0,1,0,0,0,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"sxth", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (sext_inreg tGPR:$Rm, i16))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
// Test
|
|
let isCompare = 1, isCommutable = 1, Defs = [CPSR] in
|
|
def tTST : // A8.6.230
|
|
T1pIDPEncode<0b1000, (outs), (ins tGPR:$Rn, tGPR:$Rm), IIC_iTSTr,
|
|
"tst", "\t$Rn, $Rm",
|
|
[(ARMcmpZ (and_su tGPR:$Rn, tGPR:$Rm), 0)]>;
|
|
|
|
// Zero-extend byte
|
|
def tUXTB : // A8.6.262
|
|
T1pIMiscEncode<{0,0,1,0,1,1,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"uxtb", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (and tGPR:$Rm, 0xFF))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
// Zero-extend short
|
|
def tUXTH : // A8.6.264
|
|
T1pIMiscEncode<{0,0,1,0,1,0,?}, (outs tGPR:$Rd), (ins tGPR:$Rm),
|
|
IIC_iUNAr,
|
|
"uxth", "\t$Rd, $Rm",
|
|
[(set tGPR:$Rd, (and tGPR:$Rm, 0xFFFF))]>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
// Conditional move tMOVCCr - Used to implement the Thumb SELECT_CC operation.
|
|
// Expanded after instruction selection into a branch sequence.
|
|
let usesCustomInserter = 1 in // Expanded after instruction selection.
|
|
def tMOVCCr_pseudo :
|
|
PseudoInst<(outs tGPR:$dst), (ins tGPR:$false, tGPR:$true, pred:$cc),
|
|
NoItinerary,
|
|
[/*(set tGPR:$dst, (ARMcmov tGPR:$false, tGPR:$true, imm:$cc))*/]>;
|
|
|
|
// tLEApcrel - Load a pc-relative address into a register without offending the
|
|
// assembler.
|
|
|
|
def tADR : T1I<(outs tGPR:$Rd), (ins t_adrlabel:$addr, pred:$p),
|
|
IIC_iALUi, "adr{$p}\t$Rd, $addr", []>,
|
|
T1Encoding<{1,0,1,0,0,?}> {
|
|
bits<3> Rd;
|
|
bits<8> addr;
|
|
let Inst{10-8} = Rd;
|
|
let Inst{7-0} = addr;
|
|
let DecoderMethod = "DecodeThumbAddSpecialReg";
|
|
}
|
|
|
|
let neverHasSideEffects = 1, isReMaterializable = 1 in
|
|
def tLEApcrel : tPseudoInst<(outs tGPR:$Rd), (ins i32imm:$label, pred:$p),
|
|
2, IIC_iALUi, []>;
|
|
|
|
def tLEApcrelJT : tPseudoInst<(outs tGPR:$Rd),
|
|
(ins i32imm:$label, nohash_imm:$id, pred:$p),
|
|
2, IIC_iALUi, []>;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// TLS Instructions
|
|
//
|
|
|
|
// __aeabi_read_tp preserves the registers r1-r3.
|
|
// This is a pseudo inst so that we can get the encoding right,
|
|
// complete with fixup for the aeabi_read_tp function.
|
|
let isCall = 1, Defs = [R0, R12, LR, CPSR], Uses = [SP] in
|
|
def tTPsoft : tPseudoInst<(outs), (ins), 4, IIC_Br,
|
|
[(set R0, ARMthread_pointer)]>;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SJLJ Exception handling intrinsics
|
|
//
|
|
|
|
// eh_sjlj_setjmp() is an instruction sequence to store the return address and
|
|
// save #0 in R0 for the non-longjmp case. Since by its nature we may be coming
|
|
// from some other function to get here, and we're using the stack frame for the
|
|
// containing function to save/restore registers, we can't keep anything live in
|
|
// regs across the eh_sjlj_setjmp(), else it will almost certainly have been
|
|
// tromped upon when we get here from a longjmp(). We force everything out of
|
|
// registers except for our own input by listing the relevant registers in
|
|
// Defs. By doing so, we also cause the prologue/epilogue code to actively
|
|
// preserve all of the callee-saved resgisters, which is exactly what we want.
|
|
// $val is a scratch register for our use.
|
|
let Defs = [ R0, R1, R2, R3, R4, R5, R6, R7, R12, CPSR ],
|
|
hasSideEffects = 1, isBarrier = 1, isCodeGenOnly = 1 in
|
|
def tInt_eh_sjlj_setjmp : ThumbXI<(outs),(ins tGPR:$src, tGPR:$val),
|
|
AddrModeNone, 0, NoItinerary, "","",
|
|
[(set R0, (ARMeh_sjlj_setjmp tGPR:$src, tGPR:$val))]>;
|
|
|
|
// FIXME: Non-Darwin version(s)
|
|
let isBarrier = 1, hasSideEffects = 1, isTerminator = 1, isCodeGenOnly = 1,
|
|
Defs = [ R7, LR, SP ] in
|
|
def tInt_eh_sjlj_longjmp : XI<(outs), (ins GPR:$src, GPR:$scratch),
|
|
AddrModeNone, 0, IndexModeNone,
|
|
Pseudo, NoItinerary, "", "",
|
|
[(ARMeh_sjlj_longjmp GPR:$src, GPR:$scratch)]>,
|
|
Requires<[IsThumb, IsDarwin]>;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Non-Instruction Patterns
|
|
//
|
|
|
|
// Comparisons
|
|
def : T1Pat<(ARMcmpZ tGPR:$Rn, imm0_255:$imm8),
|
|
(tCMPi8 tGPR:$Rn, imm0_255:$imm8)>;
|
|
def : T1Pat<(ARMcmpZ tGPR:$Rn, tGPR:$Rm),
|
|
(tCMPr tGPR:$Rn, tGPR:$Rm)>;
|
|
|
|
// Add with carry
|
|
def : T1Pat<(addc tGPR:$lhs, imm0_7:$rhs),
|
|
(tADDi3 tGPR:$lhs, imm0_7:$rhs)>;
|
|
def : T1Pat<(addc tGPR:$lhs, imm8_255:$rhs),
|
|
(tADDi8 tGPR:$lhs, imm8_255:$rhs)>;
|
|
def : T1Pat<(addc tGPR:$lhs, tGPR:$rhs),
|
|
(tADDrr tGPR:$lhs, tGPR:$rhs)>;
|
|
|
|
// Subtract with carry
|
|
def : T1Pat<(addc tGPR:$lhs, imm0_7_neg:$rhs),
|
|
(tSUBi3 tGPR:$lhs, imm0_7_neg:$rhs)>;
|
|
def : T1Pat<(addc tGPR:$lhs, imm8_255_neg:$rhs),
|
|
(tSUBi8 tGPR:$lhs, imm8_255_neg:$rhs)>;
|
|
def : T1Pat<(subc tGPR:$lhs, tGPR:$rhs),
|
|
(tSUBrr tGPR:$lhs, tGPR:$rhs)>;
|
|
|
|
// ConstantPool, GlobalAddress
|
|
def : T1Pat<(ARMWrapper tglobaladdr :$dst), (tLEApcrel tglobaladdr :$dst)>;
|
|
def : T1Pat<(ARMWrapper tconstpool :$dst), (tLEApcrel tconstpool :$dst)>;
|
|
|
|
// JumpTable
|
|
def : T1Pat<(ARMWrapperJT tjumptable:$dst, imm:$id),
|
|
(tLEApcrelJT tjumptable:$dst, imm:$id)>;
|
|
|
|
// Direct calls
|
|
def : T1Pat<(ARMtcall texternalsym:$func), (tBL texternalsym:$func)>,
|
|
Requires<[IsThumb, IsNotDarwin]>;
|
|
def : T1Pat<(ARMtcall texternalsym:$func), (tBLr9 texternalsym:$func)>,
|
|
Requires<[IsThumb, IsDarwin]>;
|
|
|
|
def : Tv5Pat<(ARMcall texternalsym:$func), (tBLXi texternalsym:$func)>,
|
|
Requires<[IsThumb, HasV5T, IsNotDarwin]>;
|
|
def : Tv5Pat<(ARMcall texternalsym:$func), (tBLXi_r9 texternalsym:$func)>,
|
|
Requires<[IsThumb, HasV5T, IsDarwin]>;
|
|
|
|
// Indirect calls to ARM routines
|
|
def : Tv5Pat<(ARMcall GPR:$dst), (tBLXr GPR:$dst)>,
|
|
Requires<[IsThumb, HasV5T, IsNotDarwin]>;
|
|
def : Tv5Pat<(ARMcall GPR:$dst), (tBLXr_r9 GPR:$dst)>,
|
|
Requires<[IsThumb, HasV5T, IsDarwin]>;
|
|
|
|
// zextload i1 -> zextload i8
|
|
def : T1Pat<(zextloadi1 t_addrmode_rrs1:$addr),
|
|
(tLDRBr t_addrmode_rrs1:$addr)>;
|
|
def : T1Pat<(zextloadi1 t_addrmode_is1:$addr),
|
|
(tLDRBi t_addrmode_is1:$addr)>;
|
|
|
|
// extload -> zextload
|
|
def : T1Pat<(extloadi1 t_addrmode_rrs1:$addr), (tLDRBr t_addrmode_rrs1:$addr)>;
|
|
def : T1Pat<(extloadi1 t_addrmode_is1:$addr), (tLDRBi t_addrmode_is1:$addr)>;
|
|
def : T1Pat<(extloadi8 t_addrmode_rrs1:$addr), (tLDRBr t_addrmode_rrs1:$addr)>;
|
|
def : T1Pat<(extloadi8 t_addrmode_is1:$addr), (tLDRBi t_addrmode_is1:$addr)>;
|
|
def : T1Pat<(extloadi16 t_addrmode_rrs2:$addr), (tLDRHr t_addrmode_rrs2:$addr)>;
|
|
def : T1Pat<(extloadi16 t_addrmode_is2:$addr), (tLDRHi t_addrmode_is2:$addr)>;
|
|
|
|
// If it's impossible to use [r,r] address mode for sextload, select to
|
|
// ldr{b|h} + sxt{b|h} instead.
|
|
def : T1Pat<(sextloadi8 t_addrmode_is1:$addr),
|
|
(tSXTB (tLDRBi t_addrmode_is1:$addr))>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
def : T1Pat<(sextloadi8 t_addrmode_rrs1:$addr),
|
|
(tSXTB (tLDRBr t_addrmode_rrs1:$addr))>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
def : T1Pat<(sextloadi16 t_addrmode_is2:$addr),
|
|
(tSXTH (tLDRHi t_addrmode_is2:$addr))>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
def : T1Pat<(sextloadi16 t_addrmode_rrs2:$addr),
|
|
(tSXTH (tLDRHr t_addrmode_rrs2:$addr))>,
|
|
Requires<[IsThumb, IsThumb1Only, HasV6]>;
|
|
|
|
def : T1Pat<(sextloadi8 t_addrmode_rrs1:$addr),
|
|
(tASRri (tLSLri (tLDRBr t_addrmode_rrs1:$addr), 24), 24)>;
|
|
def : T1Pat<(sextloadi8 t_addrmode_is1:$addr),
|
|
(tASRri (tLSLri (tLDRBi t_addrmode_is1:$addr), 24), 24)>;
|
|
def : T1Pat<(sextloadi16 t_addrmode_rrs2:$addr),
|
|
(tASRri (tLSLri (tLDRHr t_addrmode_rrs2:$addr), 16), 16)>;
|
|
def : T1Pat<(sextloadi16 t_addrmode_is2:$addr),
|
|
(tASRri (tLSLri (tLDRHi t_addrmode_is2:$addr), 16), 16)>;
|
|
|
|
// Large immediate handling.
|
|
|
|
// Two piece imms.
|
|
def : T1Pat<(i32 thumb_immshifted:$src),
|
|
(tLSLri (tMOVi8 (thumb_immshifted_val imm:$src)),
|
|
(thumb_immshifted_shamt imm:$src))>;
|
|
|
|
def : T1Pat<(i32 imm0_255_comp:$src),
|
|
(tMVN (tMOVi8 (imm_comp_XFORM imm:$src)))>;
|
|
|
|
// Pseudo instruction that combines ldr from constpool and add pc. This should
|
|
// be expanded into two instructions late to allow if-conversion and
|
|
// scheduling.
|
|
let isReMaterializable = 1 in
|
|
def tLDRpci_pic : PseudoInst<(outs GPR:$dst), (ins i32imm:$addr, pclabel:$cp),
|
|
NoItinerary,
|
|
[(set GPR:$dst, (ARMpic_add (load (ARMWrapper tconstpool:$addr)),
|
|
imm:$cp))]>,
|
|
Requires<[IsThumb, IsThumb1Only]>;
|
|
|
|
// Pseudo-instruction for merged POP and return.
|
|
// FIXME: remove when we have a way to marking a MI with these properties.
|
|
let isReturn = 1, isTerminator = 1, isBarrier = 1, mayLoad = 1,
|
|
hasExtraDefRegAllocReq = 1 in
|
|
def tPOP_RET : tPseudoExpand<(outs), (ins pred:$p, reglist:$regs, variable_ops),
|
|
2, IIC_iPop_Br, [],
|
|
(tPOP pred:$p, reglist:$regs)>;
|
|
|
|
// Indirect branch using "mov pc, $Rm"
|
|
let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
|
|
def tBRIND : tPseudoExpand<(outs), (ins GPR:$Rm, pred:$p),
|
|
2, IIC_Br, [(brind GPR:$Rm)],
|
|
(tMOVr PC, GPR:$Rm, pred:$p)>;
|
|
}
|
|
|
|
|
|
// In Thumb1, "nop" is encoded as a "mov r8, r8". Technically, the bf00
|
|
// encoding is available on ARMv6K, but we don't differentiate that finely.
|
|
def : InstAlias<"nop", (tMOVr R8, R8, 14, 0)>,Requires<[IsThumb, IsThumb1Only]>;
|