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https://github.com/c64scene-ar/llvm-6502.git
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be362abe9c
Discourage (allocate last) use of x86_64 R12 and R13 due to their longer instruction encodings. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59644 91177308-0d34-0410-b5e6-96231b3b80d8
543 lines
23 KiB
TableGen
543 lines
23 KiB
TableGen
//===- X86RegisterInfo.td - Describe the X86 Register File --*- 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 Register file, defining the registers themselves,
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// aliases between the registers, and the register classes built out of the
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// registers.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Register definitions...
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//
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let Namespace = "X86" in {
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// In the register alias definitions below, we define which registers alias
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// which others. We only specify which registers the small registers alias,
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// because the register file generator is smart enough to figure out that
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// AL aliases AX if we tell it that AX aliased AL (for example).
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// Dwarf numbering is different for 32-bit and 64-bit, and there are
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// variations by target as well. Currently the first entry is for X86-64,
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// second - for EH on X86-32/Darwin and third is 'generic' one (X86-32/Linux
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// and debug information on X86-32/Darwin)
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// 8-bit registers
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// Low registers
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def AL : Register<"al">, DwarfRegNum<[0, 0, 0]>;
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def DL : Register<"dl">, DwarfRegNum<[1, 2, 2]>;
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def CL : Register<"cl">, DwarfRegNum<[2, 1, 1]>;
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def BL : Register<"bl">, DwarfRegNum<[3, 3, 3]>;
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// X86-64 only
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def SIL : Register<"sil">, DwarfRegNum<[4, 6, 6]>;
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def DIL : Register<"dil">, DwarfRegNum<[5, 7, 7]>;
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def BPL : Register<"bpl">, DwarfRegNum<[6, 4, 5]>;
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def SPL : Register<"spl">, DwarfRegNum<[7, 5, 4]>;
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def R8B : Register<"r8b">, DwarfRegNum<[8, -2, -2]>;
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def R9B : Register<"r9b">, DwarfRegNum<[9, -2, -2]>;
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def R10B : Register<"r10b">, DwarfRegNum<[10, -2, -2]>;
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def R11B : Register<"r11b">, DwarfRegNum<[11, -2, -2]>;
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def R12B : Register<"r12b">, DwarfRegNum<[12, -2, -2]>;
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def R13B : Register<"r13b">, DwarfRegNum<[13, -2, -2]>;
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def R14B : Register<"r14b">, DwarfRegNum<[14, -2, -2]>;
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def R15B : Register<"r15b">, DwarfRegNum<[15, -2, -2]>;
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// High registers X86-32 only
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def AH : Register<"ah">, DwarfRegNum<[0, 0, 0]>;
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def DH : Register<"dh">, DwarfRegNum<[1, 2, 2]>;
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def CH : Register<"ch">, DwarfRegNum<[2, 1, 1]>;
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def BH : Register<"bh">, DwarfRegNum<[3, 3, 3]>;
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// 16-bit registers
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def AX : RegisterWithSubRegs<"ax", [AH,AL]>, DwarfRegNum<[0, 0, 0]>;
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def DX : RegisterWithSubRegs<"dx", [DH,DL]>, DwarfRegNum<[1, 2, 2]>;
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def CX : RegisterWithSubRegs<"cx", [CH,CL]>, DwarfRegNum<[2, 1, 1]>;
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def BX : RegisterWithSubRegs<"bx", [BH,BL]>, DwarfRegNum<[3, 3, 3]>;
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def SI : RegisterWithSubRegs<"si", [SIL]>, DwarfRegNum<[4, 6, 6]>;
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def DI : RegisterWithSubRegs<"di", [DIL]>, DwarfRegNum<[5, 7, 7]>;
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def BP : RegisterWithSubRegs<"bp", [BPL]>, DwarfRegNum<[6, 4, 5]>;
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def SP : RegisterWithSubRegs<"sp", [SPL]>, DwarfRegNum<[7, 5, 4]>;
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def IP : Register<"ip">, DwarfRegNum<[16]>;
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// X86-64 only
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def R8W : RegisterWithSubRegs<"r8w", [R8B]>, DwarfRegNum<[8, -2, -2]>;
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def R9W : RegisterWithSubRegs<"r9w", [R9B]>, DwarfRegNum<[9, -2, -2]>;
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def R10W : RegisterWithSubRegs<"r10w", [R10B]>, DwarfRegNum<[10, -2, -2]>;
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def R11W : RegisterWithSubRegs<"r11w", [R11B]>, DwarfRegNum<[11, -2, -2]>;
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def R12W : RegisterWithSubRegs<"r12w", [R12B]>, DwarfRegNum<[12, -2, -2]>;
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def R13W : RegisterWithSubRegs<"r13w", [R13B]>, DwarfRegNum<[13, -2, -2]>;
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def R14W : RegisterWithSubRegs<"r14w", [R14B]>, DwarfRegNum<[14, -2, -2]>;
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def R15W : RegisterWithSubRegs<"r15w", [R15B]>, DwarfRegNum<[15, -2, -2]>;
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// 32-bit registers
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def EAX : RegisterWithSubRegs<"eax", [AX]>, DwarfRegNum<[0, 0, 0]>;
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def EDX : RegisterWithSubRegs<"edx", [DX]>, DwarfRegNum<[1, 2, 2]>;
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def ECX : RegisterWithSubRegs<"ecx", [CX]>, DwarfRegNum<[2, 1, 1]>;
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def EBX : RegisterWithSubRegs<"ebx", [BX]>, DwarfRegNum<[3, 3, 3]>;
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def ESI : RegisterWithSubRegs<"esi", [SI]>, DwarfRegNum<[4, 6, 6]>;
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def EDI : RegisterWithSubRegs<"edi", [DI]>, DwarfRegNum<[5, 7, 7]>;
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def EBP : RegisterWithSubRegs<"ebp", [BP]>, DwarfRegNum<[6, 4, 5]>;
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def ESP : RegisterWithSubRegs<"esp", [SP]>, DwarfRegNum<[7, 5, 4]>;
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def EIP : RegisterWithSubRegs<"eip", [IP]>, DwarfRegNum<[16, 8, 8]>;
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// X86-64 only
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def R8D : RegisterWithSubRegs<"r8d", [R8W]>, DwarfRegNum<[8, -2, -2]>;
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def R9D : RegisterWithSubRegs<"r9d", [R9W]>, DwarfRegNum<[9, -2, -2]>;
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def R10D : RegisterWithSubRegs<"r10d", [R10W]>, DwarfRegNum<[10, -2, -2]>;
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def R11D : RegisterWithSubRegs<"r11d", [R11W]>, DwarfRegNum<[11, -2, -2]>;
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def R12D : RegisterWithSubRegs<"r12d", [R12W]>, DwarfRegNum<[12, -2, -2]>;
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def R13D : RegisterWithSubRegs<"r13d", [R13W]>, DwarfRegNum<[13, -2, -2]>;
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def R14D : RegisterWithSubRegs<"r14d", [R14W]>, DwarfRegNum<[14, -2, -2]>;
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def R15D : RegisterWithSubRegs<"r15d", [R15W]>, DwarfRegNum<[15, -2, -2]>;
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// 64-bit registers, X86-64 only
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def RAX : RegisterWithSubRegs<"rax", [EAX]>, DwarfRegNum<[0, -2, -2]>;
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def RDX : RegisterWithSubRegs<"rdx", [EDX]>, DwarfRegNum<[1, -2, -2]>;
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def RCX : RegisterWithSubRegs<"rcx", [ECX]>, DwarfRegNum<[2, -2, -2]>;
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def RBX : RegisterWithSubRegs<"rbx", [EBX]>, DwarfRegNum<[3, -2, -2]>;
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def RSI : RegisterWithSubRegs<"rsi", [ESI]>, DwarfRegNum<[4, -2, -2]>;
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def RDI : RegisterWithSubRegs<"rdi", [EDI]>, DwarfRegNum<[5, -2, -2]>;
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def RBP : RegisterWithSubRegs<"rbp", [EBP]>, DwarfRegNum<[6, -2, -2]>;
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def RSP : RegisterWithSubRegs<"rsp", [ESP]>, DwarfRegNum<[7, -2, -2]>;
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def R8 : RegisterWithSubRegs<"r8", [R8D]>, DwarfRegNum<[8, -2, -2]>;
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def R9 : RegisterWithSubRegs<"r9", [R9D]>, DwarfRegNum<[9, -2, -2]>;
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def R10 : RegisterWithSubRegs<"r10", [R10D]>, DwarfRegNum<[10, -2, -2]>;
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def R11 : RegisterWithSubRegs<"r11", [R11D]>, DwarfRegNum<[11, -2, -2]>;
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def R12 : RegisterWithSubRegs<"r12", [R12D]>, DwarfRegNum<[12, -2, -2]>;
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def R13 : RegisterWithSubRegs<"r13", [R13D]>, DwarfRegNum<[13, -2, -2]>;
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def R14 : RegisterWithSubRegs<"r14", [R14D]>, DwarfRegNum<[14, -2, -2]>;
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def R15 : RegisterWithSubRegs<"r15", [R15D]>, DwarfRegNum<[15, -2, -2]>;
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def RIP : RegisterWithSubRegs<"rip", [EIP]>, DwarfRegNum<[16, -2, -2]>;
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// MMX Registers. These are actually aliased to ST0 .. ST7
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def MM0 : Register<"mm0">, DwarfRegNum<[41, 29, 29]>;
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def MM1 : Register<"mm1">, DwarfRegNum<[42, 30, 30]>;
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def MM2 : Register<"mm2">, DwarfRegNum<[43, 31, 31]>;
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def MM3 : Register<"mm3">, DwarfRegNum<[44, 32, 32]>;
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def MM4 : Register<"mm4">, DwarfRegNum<[45, 33, 33]>;
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def MM5 : Register<"mm5">, DwarfRegNum<[46, 34, 34]>;
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def MM6 : Register<"mm6">, DwarfRegNum<[47, 35, 35]>;
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def MM7 : Register<"mm7">, DwarfRegNum<[48, 36, 36]>;
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// Pseudo Floating Point registers
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def FP0 : Register<"fp0">;
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def FP1 : Register<"fp1">;
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def FP2 : Register<"fp2">;
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def FP3 : Register<"fp3">;
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def FP4 : Register<"fp4">;
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def FP5 : Register<"fp5">;
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def FP6 : Register<"fp6">;
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// XMM Registers, used by the various SSE instruction set extensions
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def XMM0: Register<"xmm0">, DwarfRegNum<[17, 21, 21]>;
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def XMM1: Register<"xmm1">, DwarfRegNum<[18, 22, 22]>;
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def XMM2: Register<"xmm2">, DwarfRegNum<[19, 23, 23]>;
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def XMM3: Register<"xmm3">, DwarfRegNum<[20, 24, 24]>;
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def XMM4: Register<"xmm4">, DwarfRegNum<[21, 25, 25]>;
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def XMM5: Register<"xmm5">, DwarfRegNum<[22, 26, 26]>;
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def XMM6: Register<"xmm6">, DwarfRegNum<[23, 27, 27]>;
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def XMM7: Register<"xmm7">, DwarfRegNum<[24, 28, 28]>;
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// X86-64 only
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def XMM8: Register<"xmm8">, DwarfRegNum<[25, -2, -2]>;
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def XMM9: Register<"xmm9">, DwarfRegNum<[26, -2, -2]>;
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def XMM10: Register<"xmm10">, DwarfRegNum<[27, -2, -2]>;
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def XMM11: Register<"xmm11">, DwarfRegNum<[28, -2, -2]>;
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def XMM12: Register<"xmm12">, DwarfRegNum<[29, -2, -2]>;
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def XMM13: Register<"xmm13">, DwarfRegNum<[30, -2, -2]>;
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def XMM14: Register<"xmm14">, DwarfRegNum<[31, -2, -2]>;
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def XMM15: Register<"xmm15">, DwarfRegNum<[32, -2, -2]>;
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// Floating point stack registers
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def ST0 : Register<"st(0)">, DwarfRegNum<[33, 12, 11]>;
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def ST1 : Register<"st(1)">, DwarfRegNum<[34, 13, 12]>;
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def ST2 : Register<"st(2)">, DwarfRegNum<[35, 14, 13]>;
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def ST3 : Register<"st(3)">, DwarfRegNum<[36, 15, 14]>;
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def ST4 : Register<"st(4)">, DwarfRegNum<[37, 16, 15]>;
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def ST5 : Register<"st(5)">, DwarfRegNum<[38, 17, 16]>;
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def ST6 : Register<"st(6)">, DwarfRegNum<[39, 18, 17]>;
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def ST7 : Register<"st(7)">, DwarfRegNum<[40, 19, 18]>;
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// Status flags register
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def EFLAGS : Register<"eflags">;
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}
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//===----------------------------------------------------------------------===//
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// Subregister Set Definitions... now that we have all of the pieces, define the
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// sub registers for each register.
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//
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def x86_subreg_8bit : PatLeaf<(i32 1)>;
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def x86_subreg_16bit : PatLeaf<(i32 2)>;
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def x86_subreg_32bit : PatLeaf<(i32 3)>;
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def : SubRegSet<1, [AX, CX, DX, BX, SP, BP, SI, DI,
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R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W],
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[AL, CL, DL, BL, SPL, BPL, SIL, DIL,
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R8B, R9B, R10B, R11B, R12B, R13B, R14B, R15B]>;
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// It's unclear if this subreg set is safe, given that not all registers
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// in the class have an 'H' subreg.
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// def : SubRegSet<2, [AX, CX, DX, BX],
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// [AH, CH, DH, BH]>;
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def : SubRegSet<1, [EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
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R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D],
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[AL, CL, DL, BL, SPL, BPL, SIL, DIL,
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R8B, R9B, R10B, R11B, R12B, R13B, R14B, R15B]>;
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def : SubRegSet<2, [EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
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R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D],
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[AX, CX, DX, BX, SP, BP, SI, DI,
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R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W]>;
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def : SubRegSet<1, [RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
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R8, R9, R10, R11, R12, R13, R14, R15],
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[AL, CL, DL, BL, SPL, BPL, SIL, DIL,
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R8B, R9B, R10B, R11B, R12B, R13B, R14B, R15B]>;
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def : SubRegSet<2, [RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
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R8, R9, R10, R11, R12, R13, R14, R15],
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[AX, CX, DX, BX, SP, BP, SI, DI,
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R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W]>;
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def : SubRegSet<3, [RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
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R8, R9, R10, R11, R12, R13, R14, R15],
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[EAX, ECX, EDX, EBX, ESP, EBP, ESI, EDI,
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R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D]>;
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//===----------------------------------------------------------------------===//
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// Register Class Definitions... now that we have all of the pieces, define the
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// top-level register classes. The order specified in the register list is
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// implicitly defined to be the register allocation order.
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//
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// List call-clobbered registers before callee-save registers. RBX, RBP, (and
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// R12, R13, R14, and R15 for X86-64) are callee-save registers.
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// In 64-mode, there are 12 additional i8 registers, SIL, DIL, BPL, SPL, and
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// R8B, ... R15B.
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// Allocate R12 and R13 last, as these require an extra byte when
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// encoded in x86_64 instructions.
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// FIXME: Allow AH, CH, DH, BH in 64-mode for non-REX instructions,
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def GR8 : RegisterClass<"X86", [i8], 8,
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[AL, CL, DL, BL, AH, CH, DH, BH, SIL, DIL, BPL, SPL,
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R8B, R9B, R10B, R11B, R14B, R15B, R12B, R13B]> {
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let MethodProtos = [{
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iterator allocation_order_begin(const MachineFunction &MF) const;
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iterator allocation_order_end(const MachineFunction &MF) const;
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}];
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let MethodBodies = [{
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// Does the function dedicate RBP / EBP to being a frame ptr?
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// If so, don't allocate SPL or BPL.
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static const unsigned X86_GR8_AO_64_fp[] =
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{X86::AL, X86::CL, X86::DL, X86::SIL, X86::DIL,
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X86::R8B, X86::R9B, X86::R10B, X86::R11B,
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X86::BL, X86::R14B, X86::R15B, X86::R12B, X86::R13B};
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// If not, just don't allocate SPL.
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static const unsigned X86_GR8_AO_64[] =
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{X86::AL, X86::CL, X86::DL, X86::SIL, X86::DIL,
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X86::R8B, X86::R9B, X86::R10B, X86::R11B,
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X86::BL, X86::R14B, X86::R15B, X86::R12B, X86::R13B, X86::BPL};
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// In 32-mode, none of the 8-bit registers aliases EBP or ESP.
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static const unsigned X86_GR8_AO_32[] =
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{X86::AL, X86::CL, X86::DL, X86::AH, X86::CH, X86::DH, X86::BL, X86::BH};
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GR8Class::iterator
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GR8Class::allocation_order_begin(const MachineFunction &MF) const {
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const TargetMachine &TM = MF.getTarget();
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const TargetRegisterInfo *RI = TM.getRegisterInfo();
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const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
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if (!Subtarget.is64Bit())
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return X86_GR8_AO_32;
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else if (RI->hasFP(MF))
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return X86_GR8_AO_64_fp;
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else
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return X86_GR8_AO_64;
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}
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GR8Class::iterator
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GR8Class::allocation_order_end(const MachineFunction &MF) const {
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const TargetMachine &TM = MF.getTarget();
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const TargetRegisterInfo *RI = TM.getRegisterInfo();
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const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
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if (!Subtarget.is64Bit())
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return X86_GR8_AO_32 + (sizeof(X86_GR8_AO_32) / sizeof(unsigned));
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else if (RI->hasFP(MF))
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return X86_GR8_AO_64_fp + (sizeof(X86_GR8_AO_64_fp) / sizeof(unsigned));
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else
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return X86_GR8_AO_64 + (sizeof(X86_GR8_AO_64) / sizeof(unsigned));
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}
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}];
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}
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def GR16 : RegisterClass<"X86", [i16], 16,
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[AX, CX, DX, SI, DI, BX, BP, SP,
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R8W, R9W, R10W, R11W, R14W, R15W, R12W, R13W]> {
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let SubRegClassList = [GR8];
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let MethodProtos = [{
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iterator allocation_order_begin(const MachineFunction &MF) const;
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iterator allocation_order_end(const MachineFunction &MF) const;
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}];
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let MethodBodies = [{
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// Does the function dedicate RBP / EBP to being a frame ptr?
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// If so, don't allocate SP or BP.
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static const unsigned X86_GR16_AO_64_fp[] =
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{X86::AX, X86::CX, X86::DX, X86::SI, X86::DI,
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X86::R8W, X86::R9W, X86::R10W, X86::R11W,
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X86::BX, X86::R14W, X86::R15W, X86::R12W, X86::R13W};
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static const unsigned X86_GR16_AO_32_fp[] =
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{X86::AX, X86::CX, X86::DX, X86::SI, X86::DI, X86::BX};
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// If not, just don't allocate SPL.
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static const unsigned X86_GR16_AO_64[] =
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{X86::AX, X86::CX, X86::DX, X86::SI, X86::DI,
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X86::R8W, X86::R9W, X86::R10W, X86::R11W,
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X86::BX, X86::R14W, X86::R15W, X86::R12W, X86::R13W, X86::BP};
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static const unsigned X86_GR16_AO_32[] =
|
|
{X86::AX, X86::CX, X86::DX, X86::SI, X86::DI, X86::BX, X86::BP};
|
|
|
|
GR16Class::iterator
|
|
GR16Class::allocation_order_begin(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const TargetRegisterInfo *RI = TM.getRegisterInfo();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (Subtarget.is64Bit()) {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR16_AO_64_fp;
|
|
else
|
|
return X86_GR16_AO_64;
|
|
} else {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR16_AO_32_fp;
|
|
else
|
|
return X86_GR16_AO_32;
|
|
}
|
|
}
|
|
|
|
GR16Class::iterator
|
|
GR16Class::allocation_order_end(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const TargetRegisterInfo *RI = TM.getRegisterInfo();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (Subtarget.is64Bit()) {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR16_AO_64_fp+(sizeof(X86_GR16_AO_64_fp)/sizeof(unsigned));
|
|
else
|
|
return X86_GR16_AO_64 + (sizeof(X86_GR16_AO_64) / sizeof(unsigned));
|
|
} else {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR16_AO_32_fp+(sizeof(X86_GR16_AO_32_fp)/sizeof(unsigned));
|
|
else
|
|
return X86_GR16_AO_32 + (sizeof(X86_GR16_AO_32) / sizeof(unsigned));
|
|
}
|
|
}
|
|
}];
|
|
}
|
|
|
|
|
|
def GR32 : RegisterClass<"X86", [i32], 32,
|
|
[EAX, ECX, EDX, ESI, EDI, EBX, EBP, ESP,
|
|
R8D, R9D, R10D, R11D, R14D, R15D, R12D, R13D]> {
|
|
let SubRegClassList = [GR8, GR16];
|
|
let MethodProtos = [{
|
|
iterator allocation_order_begin(const MachineFunction &MF) const;
|
|
iterator allocation_order_end(const MachineFunction &MF) const;
|
|
}];
|
|
let MethodBodies = [{
|
|
// Does the function dedicate RBP / EBP to being a frame ptr?
|
|
// If so, don't allocate ESP or EBP.
|
|
static const unsigned X86_GR32_AO_64_fp[] =
|
|
{X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI,
|
|
X86::R8D, X86::R9D, X86::R10D, X86::R11D,
|
|
X86::EBX, X86::R14D, X86::R15D, X86::R12D, X86::R13D};
|
|
static const unsigned X86_GR32_AO_32_fp[] =
|
|
{X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI, X86::EBX};
|
|
// If not, just don't allocate SPL.
|
|
static const unsigned X86_GR32_AO_64[] =
|
|
{X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI,
|
|
X86::R8D, X86::R9D, X86::R10D, X86::R11D,
|
|
X86::EBX, X86::R14D, X86::R15D, X86::R12D, X86::R13D, X86::EBP};
|
|
static const unsigned X86_GR32_AO_32[] =
|
|
{X86::EAX, X86::ECX, X86::EDX, X86::ESI, X86::EDI, X86::EBX, X86::EBP};
|
|
|
|
GR32Class::iterator
|
|
GR32Class::allocation_order_begin(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const TargetRegisterInfo *RI = TM.getRegisterInfo();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (Subtarget.is64Bit()) {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR32_AO_64_fp;
|
|
else
|
|
return X86_GR32_AO_64;
|
|
} else {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR32_AO_32_fp;
|
|
else
|
|
return X86_GR32_AO_32;
|
|
}
|
|
}
|
|
|
|
GR32Class::iterator
|
|
GR32Class::allocation_order_end(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const TargetRegisterInfo *RI = TM.getRegisterInfo();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (Subtarget.is64Bit()) {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR32_AO_64_fp+(sizeof(X86_GR32_AO_64_fp)/sizeof(unsigned));
|
|
else
|
|
return X86_GR32_AO_64 + (sizeof(X86_GR32_AO_64) / sizeof(unsigned));
|
|
} else {
|
|
if (RI->hasFP(MF))
|
|
return X86_GR32_AO_32_fp+(sizeof(X86_GR32_AO_32_fp)/sizeof(unsigned));
|
|
else
|
|
return X86_GR32_AO_32 + (sizeof(X86_GR32_AO_32) / sizeof(unsigned));
|
|
}
|
|
}
|
|
}];
|
|
}
|
|
|
|
|
|
def GR64 : RegisterClass<"X86", [i64], 64,
|
|
[RAX, RCX, RDX, RSI, RDI, R8, R9, R10, R11,
|
|
RBX, R14, R15, R12, R13, RBP, RSP]> {
|
|
let SubRegClassList = [GR8, GR16, GR32];
|
|
let MethodProtos = [{
|
|
iterator allocation_order_end(const MachineFunction &MF) const;
|
|
}];
|
|
let MethodBodies = [{
|
|
GR64Class::iterator
|
|
GR64Class::allocation_order_end(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const TargetRegisterInfo *RI = TM.getRegisterInfo();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (!Subtarget.is64Bit())
|
|
return begin(); // None of these are allocatable in 32-bit.
|
|
if (RI->hasFP(MF)) // Does the function dedicate RBP to being a frame ptr?
|
|
return end()-2; // If so, don't allocate RSP or RBP
|
|
else
|
|
return end()-1; // If not, just don't allocate RSP
|
|
}
|
|
}];
|
|
}
|
|
|
|
|
|
// GR16, GR32 subclasses which contain registers that have GR8 sub-registers.
|
|
// These should only be used for 32-bit mode.
|
|
def GR16_ : RegisterClass<"X86", [i16], 16, [AX, CX, DX, BX]> {
|
|
let SubRegClassList = [GR8];
|
|
}
|
|
def GR32_ : RegisterClass<"X86", [i32], 32, [EAX, ECX, EDX, EBX]> {
|
|
let SubRegClassList = [GR8, GR16];
|
|
}
|
|
|
|
// A class to support the 'A' assembler constraint: EAX then EDX.
|
|
def GRAD : RegisterClass<"X86", [i32], 32, [EAX, EDX]>;
|
|
|
|
// Scalar SSE2 floating point registers.
|
|
def FR32 : RegisterClass<"X86", [f32], 32,
|
|
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
|
|
XMM8, XMM9, XMM10, XMM11,
|
|
XMM12, XMM13, XMM14, XMM15]> {
|
|
let MethodProtos = [{
|
|
iterator allocation_order_end(const MachineFunction &MF) const;
|
|
}];
|
|
let MethodBodies = [{
|
|
FR32Class::iterator
|
|
FR32Class::allocation_order_end(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (!Subtarget.is64Bit())
|
|
return end()-8; // Only XMM0 to XMM7 are available in 32-bit mode.
|
|
else
|
|
return end();
|
|
}
|
|
}];
|
|
}
|
|
|
|
def FR64 : RegisterClass<"X86", [f64], 64,
|
|
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
|
|
XMM8, XMM9, XMM10, XMM11,
|
|
XMM12, XMM13, XMM14, XMM15]> {
|
|
let MethodProtos = [{
|
|
iterator allocation_order_end(const MachineFunction &MF) const;
|
|
}];
|
|
let MethodBodies = [{
|
|
FR64Class::iterator
|
|
FR64Class::allocation_order_end(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (!Subtarget.is64Bit())
|
|
return end()-8; // Only XMM0 to XMM7 are available in 32-bit mode.
|
|
else
|
|
return end();
|
|
}
|
|
}];
|
|
}
|
|
|
|
|
|
// FIXME: This sets up the floating point register files as though they are f64
|
|
// values, though they really are f80 values. This will cause us to spill
|
|
// values as 64-bit quantities instead of 80-bit quantities, which is much much
|
|
// faster on common hardware. In reality, this should be controlled by a
|
|
// command line option or something.
|
|
|
|
def RFP32 : RegisterClass<"X86",[f32], 32, [FP0, FP1, FP2, FP3, FP4, FP5, FP6]>;
|
|
def RFP64 : RegisterClass<"X86",[f64], 32, [FP0, FP1, FP2, FP3, FP4, FP5, FP6]>;
|
|
def RFP80 : RegisterClass<"X86",[f80], 32, [FP0, FP1, FP2, FP3, FP4, FP5, FP6]>;
|
|
|
|
// Floating point stack registers (these are not allocatable by the
|
|
// register allocator - the floating point stackifier is responsible
|
|
// for transforming FPn allocations to STn registers)
|
|
def RST : RegisterClass<"X86", [f80, f64, f32], 32,
|
|
[ST0, ST1, ST2, ST3, ST4, ST5, ST6, ST7]> {
|
|
let MethodProtos = [{
|
|
iterator allocation_order_end(const MachineFunction &MF) const;
|
|
}];
|
|
let MethodBodies = [{
|
|
RSTClass::iterator
|
|
RSTClass::allocation_order_end(const MachineFunction &MF) const {
|
|
return begin();
|
|
}
|
|
}];
|
|
}
|
|
|
|
// Generic vector registers: VR64 and VR128.
|
|
def VR64 : RegisterClass<"X86", [v8i8, v4i16, v2i32, v1i64, v2f32], 64,
|
|
[MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7]>;
|
|
def VR128 : RegisterClass<"X86", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],128,
|
|
[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
|
|
XMM8, XMM9, XMM10, XMM11,
|
|
XMM12, XMM13, XMM14, XMM15]> {
|
|
let MethodProtos = [{
|
|
iterator allocation_order_end(const MachineFunction &MF) const;
|
|
}];
|
|
let MethodBodies = [{
|
|
VR128Class::iterator
|
|
VR128Class::allocation_order_end(const MachineFunction &MF) const {
|
|
const TargetMachine &TM = MF.getTarget();
|
|
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
|
|
if (!Subtarget.is64Bit())
|
|
return end()-8; // Only XMM0 to XMM7 are available in 32-bit mode.
|
|
else
|
|
return end();
|
|
}
|
|
}];
|
|
}
|
|
|
|
// Status flags registers.
|
|
def CCR : RegisterClass<"X86", [i32], 32, [EFLAGS]> {
|
|
let CopyCost = -1; // Don't allow copying of status registers.
|
|
}
|