mirror of
https://github.com/c64scene-ar/llvm-6502.git
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Drop the FpMov instructions, use plain COPY instead. Drop the FpSET/GET instruction for accessing fixed stack positions. Instead use normal COPY to/from ST registers around inline assembly, and provide a single new FpPOP_RETVAL instruction that can access the return value(s) from a call. This is still necessary since you cannot tell from the CALL instruction alone if it returns anything on the FP stack. Teach fast isel to use this. This provides a much more robust way of handling fixed stack registers - we can tolerate arbitrary FP stack instructions inserted around calls and inline assembly. Live range splitting could sometimes break x87 code by inserting spill code in unfortunate places. As a bonus we handle floating point inline assembly correctly now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134018 91177308-0d34-0410-b5e6-96231b3b80d8
468 lines
19 KiB
TableGen
468 lines
19 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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// Subregister indices.
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def sub_8bit : SubRegIndex;
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def sub_8bit_hi : SubRegIndex;
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def sub_16bit : SubRegIndex;
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def sub_32bit : SubRegIndex;
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def sub_ss : SubRegIndex;
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def sub_sd : SubRegIndex;
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def sub_xmm : SubRegIndex;
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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">;
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def DL : Register<"dl">;
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def CL : Register<"cl">;
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def BL : Register<"bl">;
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// X86-64 only, requires REX.
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let CostPerUse = 1 in {
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def SIL : Register<"sil">;
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def DIL : Register<"dil">;
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def BPL : Register<"bpl">;
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def SPL : Register<"spl">;
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def R8B : Register<"r8b">;
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def R9B : Register<"r9b">;
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def R10B : Register<"r10b">;
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def R11B : Register<"r11b">;
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def R12B : Register<"r12b">;
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def R13B : Register<"r13b">;
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def R14B : Register<"r14b">;
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def R15B : Register<"r15b">;
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}
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// High registers. On x86-64, these cannot be used in any instruction
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// with a REX prefix.
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def AH : Register<"ah">;
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def DH : Register<"dh">;
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def CH : Register<"ch">;
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def BH : Register<"bh">;
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// 16-bit registers
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let SubRegIndices = [sub_8bit, sub_8bit_hi] in {
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def AX : RegisterWithSubRegs<"ax", [AL,AH]>;
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def DX : RegisterWithSubRegs<"dx", [DL,DH]>;
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def CX : RegisterWithSubRegs<"cx", [CL,CH]>;
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def BX : RegisterWithSubRegs<"bx", [BL,BH]>;
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}
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let SubRegIndices = [sub_8bit] in {
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def SI : RegisterWithSubRegs<"si", [SIL]>;
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def DI : RegisterWithSubRegs<"di", [DIL]>;
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def BP : RegisterWithSubRegs<"bp", [BPL]>;
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def SP : RegisterWithSubRegs<"sp", [SPL]>;
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}
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def IP : Register<"ip">;
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// X86-64 only, requires REX.
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let SubRegIndices = [sub_8bit], CostPerUse = 1 in {
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def R8W : RegisterWithSubRegs<"r8w", [R8B]>;
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def R9W : RegisterWithSubRegs<"r9w", [R9B]>;
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def R10W : RegisterWithSubRegs<"r10w", [R10B]>;
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def R11W : RegisterWithSubRegs<"r11w", [R11B]>;
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def R12W : RegisterWithSubRegs<"r12w", [R12B]>;
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def R13W : RegisterWithSubRegs<"r13w", [R13B]>;
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def R14W : RegisterWithSubRegs<"r14w", [R14B]>;
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def R15W : RegisterWithSubRegs<"r15w", [R15B]>;
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}
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// 32-bit registers
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let SubRegIndices = [sub_16bit] in {
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def EAX : RegisterWithSubRegs<"eax", [AX]>, DwarfRegNum<[-2, 0, 0]>;
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def EDX : RegisterWithSubRegs<"edx", [DX]>, DwarfRegNum<[-2, 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<[-2, 3, 3]>;
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def ESI : RegisterWithSubRegs<"esi", [SI]>, DwarfRegNum<[-2, 6, 6]>;
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def EDI : RegisterWithSubRegs<"edi", [DI]>, DwarfRegNum<[-2, 7, 7]>;
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def EBP : RegisterWithSubRegs<"ebp", [BP]>, DwarfRegNum<[-2, 4, 5]>;
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def ESP : RegisterWithSubRegs<"esp", [SP]>, DwarfRegNum<[-2, 5, 4]>;
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def EIP : RegisterWithSubRegs<"eip", [IP]>, DwarfRegNum<[-2, 8, 8]>;
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// X86-64 only, requires REX
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let CostPerUse = 1 in {
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def R8D : RegisterWithSubRegs<"r8d", [R8W]>;
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def R9D : RegisterWithSubRegs<"r9d", [R9W]>;
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def R10D : RegisterWithSubRegs<"r10d", [R10W]>;
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def R11D : RegisterWithSubRegs<"r11d", [R11W]>;
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def R12D : RegisterWithSubRegs<"r12d", [R12W]>;
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def R13D : RegisterWithSubRegs<"r13d", [R13W]>;
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def R14D : RegisterWithSubRegs<"r14d", [R14W]>;
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def R15D : RegisterWithSubRegs<"r15d", [R15W]>;
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}}
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// 64-bit registers, X86-64 only
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let SubRegIndices = [sub_32bit] in {
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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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// These also require REX.
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let CostPerUse = 1 in {
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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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}}
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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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// The sub_ss and sub_sd subregs are the same registers with another regclass.
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let CompositeIndices = [(sub_ss), (sub_sd)] in {
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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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let CostPerUse = 1 in {
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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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}}
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// YMM Registers, used by AVX instructions
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let SubRegIndices = [sub_xmm] in {
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def YMM0: RegisterWithSubRegs<"ymm0", [XMM0]>, DwarfRegAlias<XMM0>;
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def YMM1: RegisterWithSubRegs<"ymm1", [XMM1]>, DwarfRegAlias<XMM1>;
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def YMM2: RegisterWithSubRegs<"ymm2", [XMM2]>, DwarfRegAlias<XMM2>;
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def YMM3: RegisterWithSubRegs<"ymm3", [XMM3]>, DwarfRegAlias<XMM3>;
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def YMM4: RegisterWithSubRegs<"ymm4", [XMM4]>, DwarfRegAlias<XMM4>;
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def YMM5: RegisterWithSubRegs<"ymm5", [XMM5]>, DwarfRegAlias<XMM5>;
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def YMM6: RegisterWithSubRegs<"ymm6", [XMM6]>, DwarfRegAlias<XMM6>;
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def YMM7: RegisterWithSubRegs<"ymm7", [XMM7]>, DwarfRegAlias<XMM7>;
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def YMM8: RegisterWithSubRegs<"ymm8", [XMM8]>, DwarfRegAlias<XMM8>;
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def YMM9: RegisterWithSubRegs<"ymm9", [XMM9]>, DwarfRegAlias<XMM9>;
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def YMM10: RegisterWithSubRegs<"ymm10", [XMM10]>, DwarfRegAlias<XMM10>;
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def YMM11: RegisterWithSubRegs<"ymm11", [XMM11]>, DwarfRegAlias<XMM11>;
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def YMM12: RegisterWithSubRegs<"ymm12", [XMM12]>, DwarfRegAlias<XMM12>;
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def YMM13: RegisterWithSubRegs<"ymm13", [XMM13]>, DwarfRegAlias<XMM13>;
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def YMM14: RegisterWithSubRegs<"ymm14", [XMM14]>, DwarfRegAlias<XMM14>;
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def YMM15: RegisterWithSubRegs<"ymm15", [XMM15]>, DwarfRegAlias<XMM15>;
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}
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class STRegister<string Name, list<Register> A> : Register<Name> {
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let Aliases = A;
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}
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// Floating point stack registers. These don't map one-to-one to the FP
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// pseudo registers, but we still mark them as aliasing FP registers. That
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// way both kinds can be live without exceeding the stack depth. ST registers
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// are only live around inline assembly.
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def ST0 : STRegister<"st(0)", []>, DwarfRegNum<[33, 12, 11]>;
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def ST1 : STRegister<"st(1)", [FP6]>, DwarfRegNum<[34, 13, 12]>;
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def ST2 : STRegister<"st(2)", [FP5]>, DwarfRegNum<[35, 14, 13]>;
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def ST3 : STRegister<"st(3)", [FP4]>, DwarfRegNum<[36, 15, 14]>;
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def ST4 : STRegister<"st(4)", [FP3]>, DwarfRegNum<[37, 16, 15]>;
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def ST5 : STRegister<"st(5)", [FP2]>, DwarfRegNum<[38, 17, 16]>;
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def ST6 : STRegister<"st(6)", [FP1]>, DwarfRegNum<[39, 18, 17]>;
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def ST7 : STRegister<"st(7)", [FP0]>, DwarfRegNum<[40, 19, 18]>;
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// Status flags register
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def EFLAGS : Register<"flags">;
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// Segment registers
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def CS : Register<"cs">;
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def DS : Register<"ds">;
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def SS : Register<"ss">;
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def ES : Register<"es">;
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def FS : Register<"fs">;
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def GS : Register<"gs">;
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// Debug registers
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def DR0 : Register<"dr0">;
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def DR1 : Register<"dr1">;
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def DR2 : Register<"dr2">;
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def DR3 : Register<"dr3">;
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def DR4 : Register<"dr4">;
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def DR5 : Register<"dr5">;
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def DR6 : Register<"dr6">;
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def DR7 : Register<"dr7">;
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// Control registers
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def CR0 : Register<"cr0">;
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def CR1 : Register<"cr1">;
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def CR2 : Register<"cr2">;
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def CR3 : Register<"cr3">;
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def CR4 : Register<"cr4">;
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def CR5 : Register<"cr5">;
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def CR6 : Register<"cr6">;
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def CR7 : Register<"cr7">;
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def CR8 : Register<"cr8">;
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def CR9 : Register<"cr9">;
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def CR10 : Register<"cr10">;
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def CR11 : Register<"cr11">;
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def CR12 : Register<"cr12">;
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def CR13 : Register<"cr13">;
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def CR14 : Register<"cr14">;
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def CR15 : Register<"cr15">;
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// Pseudo index registers
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def EIZ : Register<"eiz">;
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def RIZ : Register<"riz">;
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}
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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 to be used as general-purpose registers in
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// 64-bit mode. The main complication is that they cannot be encoded in an
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// instruction requiring a REX prefix, while SIL, DIL, BPL, R8D, etc.
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// require a REX prefix. For example, "addb %ah, %dil" and "movzbl %ah, %r8d"
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// cannot be encoded.
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def GR8 : RegisterClass<"X86", [i8], 8,
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(add AL, CL, DL, AH, CH, DH, BL, BH, SIL, DIL, BPL, SPL,
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R8B, R9B, R10B, R11B, R14B, R15B, R12B, R13B)> {
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let AltOrders = [(sub GR8, AH, BH, CH, DH)];
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let AltOrderSelect = [{
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return MF.getTarget().getSubtarget<X86Subtarget>().is64Bit();
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}];
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}
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def GR16 : RegisterClass<"X86", [i16], 16,
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(add 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 SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi)];
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}
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def GR32 : RegisterClass<"X86", [i32], 32,
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(add EAX, ECX, EDX, ESI, EDI, EBX, EBP, ESP,
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R8D, R9D, R10D, R11D, R14D, R15D, R12D, R13D)> {
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let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi), (GR16 sub_16bit)];
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}
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// GR64 - 64-bit GPRs. This oddly includes RIP, which isn't accurate, since
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// RIP isn't really a register and it can't be used anywhere except in an
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// address, but it doesn't cause trouble.
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def GR64 : RegisterClass<"X86", [i64], 64,
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(add RAX, RCX, RDX, RSI, RDI, R8, R9, R10, R11,
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RBX, R14, R15, R12, R13, RBP, RSP, RIP)> {
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let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi),
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(GR16 sub_16bit),
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(GR32 sub_32bit)];
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}
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// Segment registers for use by MOV instructions (and others) that have a
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// segment register as one operand. Always contain a 16-bit segment
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// descriptor.
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def SEGMENT_REG : RegisterClass<"X86", [i16], 16, (add CS, DS, SS, ES, FS, GS)>;
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// Debug registers.
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def DEBUG_REG : RegisterClass<"X86", [i32], 32, (sequence "DR%u", 0, 7)>;
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// Control registers.
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def CONTROL_REG : RegisterClass<"X86", [i64], 64, (sequence "CR%u", 0, 15)>;
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// GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD, GR32_ABCD, GR64_ABCD - Subclasses of
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// GR8, GR16, GR32, and GR64 which contain just the "a" "b", "c", and "d"
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// registers. On x86-32, GR16_ABCD and GR32_ABCD are classes for registers
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// that support 8-bit subreg operations. On x86-64, GR16_ABCD, GR32_ABCD,
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// and GR64_ABCD are classes for registers that support 8-bit h-register
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// operations.
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def GR8_ABCD_L : RegisterClass<"X86", [i8], 8, (add AL, CL, DL, BL)>;
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def GR8_ABCD_H : RegisterClass<"X86", [i8], 8, (add AH, CH, DH, BH)>;
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def GR16_ABCD : RegisterClass<"X86", [i16], 16, (add AX, CX, DX, BX)> {
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let SubRegClasses = [(GR8_ABCD_L sub_8bit), (GR8_ABCD_H sub_8bit_hi)];
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}
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def GR32_ABCD : RegisterClass<"X86", [i32], 32, (add EAX, ECX, EDX, EBX)> {
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let SubRegClasses = [(GR8_ABCD_L sub_8bit),
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(GR8_ABCD_H sub_8bit_hi),
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(GR16_ABCD sub_16bit)];
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}
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def GR64_ABCD : RegisterClass<"X86", [i64], 64, (add RAX, RCX, RDX, RBX)> {
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let SubRegClasses = [(GR8_ABCD_L sub_8bit),
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(GR8_ABCD_H sub_8bit_hi),
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(GR16_ABCD sub_16bit),
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(GR32_ABCD sub_32bit)];
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}
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def GR32_TC : RegisterClass<"X86", [i32], 32, (add EAX, ECX, EDX)> {
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let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi), (GR16 sub_16bit)];
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}
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def GR64_TC : RegisterClass<"X86", [i64], 64, (add RAX, RCX, RDX, RSI, RDI,
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R8, R9, R11, RIP)> {
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let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi),
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(GR16 sub_16bit),
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(GR32_TC sub_32bit)];
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}
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|
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def GR64_TCW64 : RegisterClass<"X86", [i64], 64, (add RAX, RCX, RDX,
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R8, R9, R11)>;
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|
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// GR8_NOREX - GR8 registers which do not require a REX prefix.
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def GR8_NOREX : RegisterClass<"X86", [i8], 8,
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(add AL, CL, DL, AH, CH, DH, BL, BH)> {
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let AltOrders = [(sub GR8_NOREX, AH, BH, CH, DH)];
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let AltOrderSelect = [{
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return MF.getTarget().getSubtarget<X86Subtarget>().is64Bit();
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}];
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}
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// GR16_NOREX - GR16 registers which do not require a REX prefix.
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def GR16_NOREX : RegisterClass<"X86", [i16], 16,
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(add AX, CX, DX, SI, DI, BX, BP, SP)> {
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let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi)];
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}
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// GR32_NOREX - GR32 registers which do not require a REX prefix.
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|
def GR32_NOREX : RegisterClass<"X86", [i32], 32,
|
|
(add EAX, ECX, EDX, ESI, EDI, EBX, EBP, ESP)> {
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|
let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
|
|
(GR16_NOREX sub_16bit)];
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|
}
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|
// GR64_NOREX - GR64 registers which do not require a REX prefix.
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|
def GR64_NOREX : RegisterClass<"X86", [i64], 64,
|
|
(add RAX, RCX, RDX, RSI, RDI, RBX, RBP, RSP, RIP)> {
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|
let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
|
|
(GR16_NOREX sub_16bit),
|
|
(GR32_NOREX sub_32bit)];
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|
}
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|
|
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// GR32_NOSP - GR32 registers except ESP.
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|
def GR32_NOSP : RegisterClass<"X86", [i32], 32, (sub GR32, ESP)> {
|
|
let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi), (GR16 sub_16bit)];
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|
}
|
|
|
|
// GR64_NOSP - GR64 registers except RSP (and RIP).
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|
def GR64_NOSP : RegisterClass<"X86", [i64], 64, (sub GR64, RSP, RIP)> {
|
|
let SubRegClasses = [(GR8 sub_8bit, sub_8bit_hi),
|
|
(GR16 sub_16bit),
|
|
(GR32_NOSP sub_32bit)];
|
|
}
|
|
|
|
// GR32_NOREX_NOSP - GR32 registers which do not require a REX prefix except
|
|
// ESP.
|
|
def GR32_NOREX_NOSP : RegisterClass<"X86", [i32], 32,
|
|
(and GR32_NOREX, GR32_NOSP)> {
|
|
let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
|
|
(GR16_NOREX sub_16bit)];
|
|
}
|
|
|
|
// GR64_NOREX_NOSP - GR64_NOREX registers except RSP.
|
|
def GR64_NOREX_NOSP : RegisterClass<"X86", [i64], 64,
|
|
(and GR64_NOREX, GR64_NOSP)> {
|
|
let SubRegClasses = [(GR8_NOREX sub_8bit, sub_8bit_hi),
|
|
(GR16_NOREX sub_16bit),
|
|
(GR32_NOREX_NOSP sub_32bit)];
|
|
}
|
|
|
|
// A class to support the 'A' assembler constraint: EAX then EDX.
|
|
def GR32_AD : RegisterClass<"X86", [i32], 32, (add EAX, EDX)> {
|
|
let SubRegClasses = [(GR8_ABCD_L sub_8bit),
|
|
(GR8_ABCD_H sub_8bit_hi),
|
|
(GR16_ABCD sub_16bit)];
|
|
}
|
|
|
|
// Scalar SSE2 floating point registers.
|
|
def FR32 : RegisterClass<"X86", [f32], 32, (sequence "XMM%u", 0, 15)>;
|
|
|
|
def FR64 : RegisterClass<"X86", [f64], 64, (add FR32)>;
|
|
|
|
|
|
// 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, (sequence "FP%u", 0, 6)>;
|
|
def RFP64 : RegisterClass<"X86",[f64], 32, (add RFP32)>;
|
|
def RFP80 : RegisterClass<"X86",[f80], 32, (add RFP32)>;
|
|
|
|
// 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, (sequence "ST%u", 0, 7)> {
|
|
let isAllocatable = 0;
|
|
}
|
|
|
|
// Generic vector registers: VR64 and VR128.
|
|
def VR64: RegisterClass<"X86", [x86mmx], 64, (sequence "MM%u", 0, 7)>;
|
|
def VR128 : RegisterClass<"X86", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
|
|
128, (add FR32)> {
|
|
let SubRegClasses = [(FR32 sub_ss), (FR64 sub_sd)];
|
|
}
|
|
|
|
def VR256 : RegisterClass<"X86", [v32i8, v8i32, v4i64, v8f32, v4f64], 256,
|
|
(sequence "YMM%u", 0, 15)> {
|
|
let SubRegClasses = [(FR32 sub_ss), (FR64 sub_sd), (VR128 sub_xmm)];
|
|
}
|
|
|
|
// Status flags registers.
|
|
def CCR : RegisterClass<"X86", [i32], 32, (add EFLAGS)> {
|
|
let CopyCost = -1; // Don't allow copying of status registers.
|
|
let isAllocatable = 0;
|
|
}
|