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305 lines
14 KiB
TableGen
305 lines
14 KiB
TableGen
//===- X86InstrControl.td - Control Flow Instructions ------*- 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 X86 jump, return, call, and related instructions.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Control Flow Instructions.
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//
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// Return instructions.
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let isTerminator = 1, isReturn = 1, isBarrier = 1,
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hasCtrlDep = 1, FPForm = SpecialFP in {
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def RET : I <0xC3, RawFrm, (outs), (ins variable_ops),
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"ret",
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[(X86retflag 0)]>;
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def RETI : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt, variable_ops),
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"ret\t$amt",
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[(X86retflag timm:$amt)]>;
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def RETIW : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt, variable_ops),
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"retw\t$amt",
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[]>, OpSize;
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def LRETL : I <0xCB, RawFrm, (outs), (ins),
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"lretl", []>;
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def LRETQ : RI <0xCB, RawFrm, (outs), (ins),
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"lretq", []>;
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def LRETI : Ii16<0xCA, RawFrm, (outs), (ins i16imm:$amt),
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"lret\t$amt", []>;
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def LRETIW : Ii16<0xCA, RawFrm, (outs), (ins i16imm:$amt),
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"lretw\t$amt", []>, OpSize;
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}
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// Unconditional branches.
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let isBarrier = 1, isBranch = 1, isTerminator = 1 in {
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def JMP_4 : Ii32PCRel<0xE9, RawFrm, (outs), (ins brtarget:$dst),
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"jmp\t$dst", [(br bb:$dst)]>;
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def JMP_1 : Ii8PCRel<0xEB, RawFrm, (outs), (ins brtarget8:$dst),
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"jmp\t$dst", []>;
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def JMP64pcrel32 : I<0xE9, RawFrm, (outs), (ins brtarget:$dst),
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"jmp{q}\t$dst", []>;
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}
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// Conditional Branches.
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let isBranch = 1, isTerminator = 1, Uses = [EFLAGS] in {
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multiclass ICBr<bits<8> opc1, bits<8> opc4, string asm, PatFrag Cond> {
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def _1 : Ii8PCRel <opc1, RawFrm, (outs), (ins brtarget8:$dst), asm, []>;
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def _4 : Ii32PCRel<opc4, RawFrm, (outs), (ins brtarget:$dst), asm,
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[(X86brcond bb:$dst, Cond, EFLAGS)]>, TB;
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}
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}
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defm JO : ICBr<0x70, 0x80, "jo\t$dst" , X86_COND_O>;
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defm JNO : ICBr<0x71, 0x81, "jno\t$dst" , X86_COND_NO>;
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defm JB : ICBr<0x72, 0x82, "jb\t$dst" , X86_COND_B>;
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defm JAE : ICBr<0x73, 0x83, "jae\t$dst", X86_COND_AE>;
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defm JE : ICBr<0x74, 0x84, "je\t$dst" , X86_COND_E>;
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defm JNE : ICBr<0x75, 0x85, "jne\t$dst", X86_COND_NE>;
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defm JBE : ICBr<0x76, 0x86, "jbe\t$dst", X86_COND_BE>;
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defm JA : ICBr<0x77, 0x87, "ja\t$dst" , X86_COND_A>;
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defm JS : ICBr<0x78, 0x88, "js\t$dst" , X86_COND_S>;
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defm JNS : ICBr<0x79, 0x89, "jns\t$dst", X86_COND_NS>;
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defm JP : ICBr<0x7A, 0x8A, "jp\t$dst" , X86_COND_P>;
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defm JNP : ICBr<0x7B, 0x8B, "jnp\t$dst", X86_COND_NP>;
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defm JL : ICBr<0x7C, 0x8C, "jl\t$dst" , X86_COND_L>;
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defm JGE : ICBr<0x7D, 0x8D, "jge\t$dst", X86_COND_GE>;
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defm JLE : ICBr<0x7E, 0x8E, "jle\t$dst", X86_COND_LE>;
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defm JG : ICBr<0x7F, 0x8F, "jg\t$dst" , X86_COND_G>;
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// jcx/jecx/jrcx instructions.
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let isAsmParserOnly = 1, isBranch = 1, isTerminator = 1 in {
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// These are the 32-bit versions of this instruction for the asmparser. In
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// 32-bit mode, the address size prefix is jcxz and the unprefixed version is
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// jecxz.
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let Uses = [CX] in
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def JCXZ : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst),
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"jcxz\t$dst", []>, AdSize, Requires<[In32BitMode]>;
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let Uses = [ECX] in
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def JECXZ_32 : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst),
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"jecxz\t$dst", []>, Requires<[In32BitMode]>;
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// J*CXZ instruction: 64-bit versions of this instruction for the asmparser.
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// In 64-bit mode, the address size prefix is jecxz and the unprefixed version
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// is jrcxz.
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let Uses = [ECX] in
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def JECXZ_64 : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst),
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"jecxz\t$dst", []>, AdSize, Requires<[In64BitMode]>;
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let Uses = [RCX] in
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def JRCXZ : Ii8PCRel<0xE3, RawFrm, (outs), (ins brtarget8:$dst),
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"jrcxz\t$dst", []>, Requires<[In64BitMode]>;
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}
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// Indirect branches
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let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
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def JMP32r : I<0xFF, MRM4r, (outs), (ins GR32:$dst), "jmp{l}\t{*}$dst",
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[(brind GR32:$dst)]>, Requires<[In32BitMode]>;
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def JMP32m : I<0xFF, MRM4m, (outs), (ins i32mem:$dst), "jmp{l}\t{*}$dst",
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[(brind (loadi32 addr:$dst))]>, Requires<[In32BitMode]>;
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def JMP64r : I<0xFF, MRM4r, (outs), (ins GR64:$dst), "jmp{q}\t{*}$dst",
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[(brind GR64:$dst)]>, Requires<[In64BitMode]>;
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def JMP64m : I<0xFF, MRM4m, (outs), (ins i64mem:$dst), "jmp{q}\t{*}$dst",
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[(brind (loadi64 addr:$dst))]>, Requires<[In64BitMode]>;
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def FARJMP16i : Iseg16<0xEA, RawFrmImm16, (outs),
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(ins i16imm:$off, i16imm:$seg),
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"ljmp{w}\t{$seg, $off|$off, $seg}", []>, OpSize;
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def FARJMP32i : Iseg32<0xEA, RawFrmImm16, (outs),
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(ins i32imm:$off, i16imm:$seg),
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"ljmp{l}\t{$seg, $off|$off, $seg}", []>;
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def FARJMP64 : RI<0xFF, MRM5m, (outs), (ins opaque80mem:$dst),
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"ljmp{q}\t{*}$dst", []>;
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def FARJMP16m : I<0xFF, MRM5m, (outs), (ins opaque32mem:$dst),
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"ljmp{w}\t{*}$dst", []>, OpSize;
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def FARJMP32m : I<0xFF, MRM5m, (outs), (ins opaque48mem:$dst),
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"ljmp{l}\t{*}$dst", []>;
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}
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// Loop instructions
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def LOOP : Ii8PCRel<0xE2, RawFrm, (outs), (ins brtarget8:$dst), "loop\t$dst", []>;
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def LOOPE : Ii8PCRel<0xE1, RawFrm, (outs), (ins brtarget8:$dst), "loope\t$dst", []>;
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def LOOPNE : Ii8PCRel<0xE0, RawFrm, (outs), (ins brtarget8:$dst), "loopne\t$dst", []>;
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//===----------------------------------------------------------------------===//
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// Call Instructions...
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//
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let isCall = 1 in
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// All calls clobber the non-callee saved registers. ESP is marked as
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// a use to prevent stack-pointer assignments that appear immediately
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// before calls from potentially appearing dead. Uses for argument
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// registers are added manually.
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let Defs = [EAX, ECX, EDX, FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0,
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MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
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XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
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XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, EFLAGS],
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Uses = [ESP] in {
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def CALLpcrel32 : Ii32PCRel<0xE8, RawFrm,
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(outs), (ins i32imm_pcrel:$dst,variable_ops),
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"call{l}\t$dst", []>, Requires<[In32BitMode]>;
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def CALL32r : I<0xFF, MRM2r, (outs), (ins GR32:$dst, variable_ops),
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"call{l}\t{*}$dst", [(X86call GR32:$dst)]>,
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Requires<[In32BitMode]>;
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def CALL32m : I<0xFF, MRM2m, (outs), (ins i32mem:$dst, variable_ops),
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"call{l}\t{*}$dst", [(X86call (loadi32 addr:$dst))]>,
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Requires<[In32BitMode]>;
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def FARCALL16i : Iseg16<0x9A, RawFrmImm16, (outs),
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(ins i16imm:$off, i16imm:$seg),
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"lcall{w}\t{$seg, $off|$off, $seg}", []>, OpSize;
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def FARCALL32i : Iseg32<0x9A, RawFrmImm16, (outs),
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(ins i32imm:$off, i16imm:$seg),
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"lcall{l}\t{$seg, $off|$off, $seg}", []>;
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def FARCALL16m : I<0xFF, MRM3m, (outs), (ins opaque32mem:$dst),
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"lcall{w}\t{*}$dst", []>, OpSize;
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def FARCALL32m : I<0xFF, MRM3m, (outs), (ins opaque48mem:$dst),
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"lcall{l}\t{*}$dst", []>;
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// callw for 16 bit code for the assembler.
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let isAsmParserOnly = 1 in
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def CALLpcrel16 : Ii16PCRel<0xE8, RawFrm,
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(outs), (ins i16imm_pcrel:$dst, variable_ops),
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"callw\t$dst", []>, OpSize;
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}
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// Tail call stuff.
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let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1,
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isCodeGenOnly = 1 in
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let Defs = [EAX, ECX, EDX, FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0,
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MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
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XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
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XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, EFLAGS],
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Uses = [ESP] in {
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def TCRETURNdi : PseudoI<(outs),
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(ins i32imm_pcrel:$dst, i32imm:$offset, variable_ops), []>;
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def TCRETURNri : PseudoI<(outs),
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(ins GR32_TC:$dst, i32imm:$offset, variable_ops), []>;
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let mayLoad = 1 in
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def TCRETURNmi : PseudoI<(outs),
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(ins i32mem_TC:$dst, i32imm:$offset, variable_ops), []>;
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// FIXME: The should be pseudo instructions that are lowered when going to
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// mcinst.
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def TAILJMPd : Ii32PCRel<0xE9, RawFrm, (outs),
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(ins i32imm_pcrel:$dst, variable_ops),
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"jmp\t$dst # TAILCALL",
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[]>;
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def TAILJMPr : I<0xFF, MRM4r, (outs), (ins GR32_TC:$dst, variable_ops),
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"", []>; // FIXME: Remove encoding when JIT is dead.
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let mayLoad = 1 in
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def TAILJMPm : I<0xFF, MRM4m, (outs), (ins i32mem_TC:$dst, variable_ops),
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"jmp{l}\t{*}$dst # TAILCALL", []>;
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}
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//===----------------------------------------------------------------------===//
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// Call Instructions...
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//
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let isCall = 1 in
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// All calls clobber the non-callee saved registers. RSP is marked as
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// a use to prevent stack-pointer assignments that appear immediately
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// before calls from potentially appearing dead. Uses for argument
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// registers are added manually.
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let Defs = [RAX, RCX, RDX, RSI, RDI, R8, R9, R10, R11,
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FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0, ST1,
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MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
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XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
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XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, EFLAGS],
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Uses = [RSP] in {
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// NOTE: this pattern doesn't match "X86call imm", because we do not know
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// that the offset between an arbitrary immediate and the call will fit in
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// the 32-bit pcrel field that we have.
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def CALL64pcrel32 : Ii32PCRel<0xE8, RawFrm,
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(outs), (ins i64i32imm_pcrel:$dst, variable_ops),
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"call{q}\t$dst", []>,
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Requires<[In64BitMode, NotWin64]>;
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def CALL64r : I<0xFF, MRM2r, (outs), (ins GR64:$dst, variable_ops),
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"call{q}\t{*}$dst", [(X86call GR64:$dst)]>,
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Requires<[In64BitMode, NotWin64]>;
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def CALL64m : I<0xFF, MRM2m, (outs), (ins i64mem:$dst, variable_ops),
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"call{q}\t{*}$dst", [(X86call (loadi64 addr:$dst))]>,
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Requires<[In64BitMode, NotWin64]>;
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def FARCALL64 : RI<0xFF, MRM3m, (outs), (ins opaque80mem:$dst),
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"lcall{q}\t{*}$dst", []>;
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}
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// FIXME: We need to teach codegen about single list of call-clobbered
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// registers.
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let isCall = 1, isCodeGenOnly = 1 in
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// All calls clobber the non-callee saved registers. RSP is marked as
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// a use to prevent stack-pointer assignments that appear immediately
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// before calls from potentially appearing dead. Uses for argument
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// registers are added manually.
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let Defs = [RAX, RCX, RDX, R8, R9, R10, R11,
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FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0, ST1,
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MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
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XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, EFLAGS],
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Uses = [RSP] in {
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def WINCALL64pcrel32 : Ii32PCRel<0xE8, RawFrm,
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(outs), (ins i64i32imm_pcrel:$dst, variable_ops),
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"call{q}\t$dst", []>,
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Requires<[IsWin64]>;
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def WINCALL64r : I<0xFF, MRM2r, (outs), (ins GR64:$dst, variable_ops),
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"call{q}\t{*}$dst",
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[(X86call GR64:$dst)]>, Requires<[IsWin64]>;
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def WINCALL64m : I<0xFF, MRM2m, (outs),
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(ins i64mem:$dst,variable_ops),
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"call{q}\t{*}$dst",
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[(X86call (loadi64 addr:$dst))]>,
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Requires<[IsWin64]>;
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}
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let isCall = 1, isCodeGenOnly = 1 in
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// __chkstk(MSVC): clobber R10, R11 and EFLAGS.
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// ___chkstk(Mingw64): clobber R10, R11, RAX and EFLAGS, and update RSP.
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let Defs = [RAX, R10, R11, RSP, EFLAGS],
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Uses = [RSP] in {
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def W64ALLOCA : Ii32PCRel<0xE8, RawFrm,
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(outs), (ins i64i32imm_pcrel:$dst, variable_ops),
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"call{q}\t$dst", []>,
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Requires<[IsWin64]>;
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}
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let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1,
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isCodeGenOnly = 1 in
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// AMD64 cc clobbers RSI, RDI, XMM6-XMM15.
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let Defs = [RAX, RCX, RDX, R8, R9, R10, R11,
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FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0, ST1,
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MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
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XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, EFLAGS],
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Uses = [RSP],
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usesCustomInserter = 1 in {
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def TCRETURNdi64 : PseudoI<(outs),
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(ins i64i32imm_pcrel:$dst, i32imm:$offset, variable_ops),
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[]>;
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def TCRETURNri64 : PseudoI<(outs),
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(ins ptr_rc_tailcall:$dst, i32imm:$offset, variable_ops), []>;
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let mayLoad = 1 in
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def TCRETURNmi64 : PseudoI<(outs),
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(ins i64mem_TC:$dst, i32imm:$offset, variable_ops), []>;
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def TAILJMPd64 : Ii32PCRel<0xE9, RawFrm, (outs),
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(ins i64i32imm_pcrel:$dst, variable_ops),
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"jmp\t$dst # TAILCALL", []>;
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def TAILJMPr64 : I<0xFF, MRM4r, (outs), (ins ptr_rc_tailcall:$dst, variable_ops),
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"jmp{q}\t{*}$dst # TAILCALL", []>;
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let mayLoad = 1 in
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def TAILJMPm64 : I<0xFF, MRM4m, (outs), (ins i64mem_TC:$dst, variable_ops),
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"jmp{q}\t{*}$dst # TAILCALL", []>;
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}
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