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458 lines
16 KiB
ObjectPascal
458 lines
16 KiB
ObjectPascal
{
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Copyright (C) 1998-2000 by Florian Klaempfl
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This unit implements an asmlistitem class for the Alpha architecture.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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{
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This unit implements an asmlistitem class for the Alpha architecture.
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}
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unit cpubase;
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{$i fpcdefs.inc}
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interface
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uses
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cutils,cclasses,globals,aasmbase,cpuinfo,cginfo;
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type
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{ all registers }
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TRegister = (R_NO, { R_NO is Mandatory, signifies no register }
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R_0,R_1,R_2,R_3,R_4,R_5,R_6,R_7,R_8,R_9,
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R_10,R_11,R_12,R_13,R_14,R_15,R_16,R_17,R_18,R_19,
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R_20,R_21,R_22,R_23,R_24,R_25,R_26,R_27,R_28,R_29,
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R_30,R_31,
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R_F0,R_F1,R_F2,R_F3,R_F4,R_F5,R_F6,R_F7,R_F8,R_F9,
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R_F10,R_F11,R_F12,R_F13,R_F14,R_F15,R_F16,R_F17,R_F18,R_F19,
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R_F20,R_F21,R_F22,R_F23,R_F24,R_F25,R_F26,R_F27,R_F28,R_F29,
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R_F30,R_F31);
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tasmop = (A_ADDF,A_ADDG,A_ADDL,A_ADDQ,
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A_ADDS,A_ADDT,A_AMASK,A_AND,A_BEQ,A_BGE,
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A_BGT,A_BIC,A_BIS,A_BLBC,A_BLBS,A_BLE,
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A_BLT,A_BNE,A_BR,A_BSR,A_CALL_PAL,A_CMOVEQ,
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A_CMOVGE,A_CMOVGT,A_CMOVLBC,A_CMOVLBS,A_CMOVLE,A_CMOVLT,
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A_CMOVNE,A_CMPBGE,A_CMPEQ,A_CMPGEQ,A_CMPGLE,A_CMPGLT,
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A_CMPLE,A_CMPLT,A_CMPTEQ,A_CMPTLE,A_CMPTLT,A_CMPTUN,
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A_CMPULE,A_CMPULT,A_CPYS,A_CPYSE,A_CPYSN,A_CTLZ,
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A_CTPOP,A_CTTZ,A_CVTDG,A_CVTGD,A_CVTGF,A_CVTGQ,
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A_CVTLQ,A_CVTQF,A_CVTQG,A_CVTQL,A_CVTQS,A_CVTQT,
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A_CVTST,A_CVTTQ,A_CVTTS,A_DIVF,A_DIVG,A_DIVS,
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A_DIVT,A_ECB,A_EQV,A_EXCB,A_EXTBL,A_EXTLH,
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A_EXTLL,A_EXTQH,A_EXTQL,A_EXTWH,A_EXTWL,A_FBEQ,
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A_FBGE,A_FBGT,A_FBLE,A_FBLT,A_FBNE,A_FCMOVEQ,
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A_FCMOVGE,A_FCMOVGT,A_FCMOVLE,A_FCMOVLT,A_FCMOVNE,A_FETCH,
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A_FETCH_M,A_FTOIS,A_FTOIT,A_IMPLVER,A_INSBL,A_INSLH,
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A_INSLL,A_INSQH,A_INSQL,A_INSWH,A_INSWL,A_ITOFF,
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A_ITOFS,A_ITOFT,A_JMP,A_JSR,A_JSR_COROUTINE,A_LDA,
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A_LDAH,A_LDBU,A_LDWU,A_LDF,A_LDG,A_LDL,
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A_LDL_L,A_LDQ,A_LDQ_L,A_LDQ_U,A_LDS,A_LDT,
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A_MAXSB8,A_MAXSW4,A_MAXUB8,A_MAXUW4,A_MB,A_MF_FPCR,
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A_MINSB8,A_MINSW4,A_MINUB8,A_MINUW4,A_MSKBL,A_MSKLH,
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A_MSKLL,A_MSKQH,A_MSKQL,A_MSKWH,A_MSKWL,A_MT_FPCR,
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A_MULF,A_MULG,A_MULL,A_MULQ,
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A_MULS,A_MULT,A_ORNOT,A_PERR,A_PKLB,A_PKWB,
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A_RC,A_RET,A_RPCC,A_RS,A_S4ADDL,A_S4ADDQ,
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A_S4SUBL,A_S4SUBQ,A_S8ADDL,A_S8ADDQ,A_S8SUBL,A_S8SUBQ,
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A_SEXTB,A_SEXTW,A_SLL,A_SQRTF,A_SQRTG,A_SQRTS,
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A_SQRTT,A_SRA,A_SRL,A_STB,A_STF,A_STG,
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A_STS,A_STL,A_STL_C,A_STQ,A_STQ_C,A_STQ_U,
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A_STT,A_STW,A_SUBF,A_SUBG,A_SUBL,
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A_SUBQ,A_SUBS,A_SUBT,A_TRAPB,A_UMULH,
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A_UNPKBL,A_UNPKBW,A_WH64,A_WMB,A_XOR,A_ZAP,
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A_ZAPNOT
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{ Psuedo code understood by the gnu assembler }
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,A_LDGP);
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const
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firstop = low(tasmop);
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lastop = high(tasmop);
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std_reg2str : array[tregister] of string[4] = (
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'',
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'','','','','','','','','','',
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'','','','','','','','','','',
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'','','','','','','','','','',
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'','',
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'','','','','','','','','','',
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'','','','','','','','','','',
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'','','','','','','','','','',
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'',''
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);
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type
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TAsmCond =
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(
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C_None,C_A,C_AE,C_B,C_BE,C_C,C_E,C_G,C_GE,C_L,C_LE,C_NA,C_NAE,
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C_NB,C_NBE,C_NC,C_NE,C_NG,C_NGE,C_NL,C_NLE,C_NO,C_NP,C_NS,C_NZ,C_O,C_P,
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C_PE,C_PO,C_S,C_Z
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);
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TRegisterset = Set of TRegister;
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tregister64 = tregister;
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Const
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Firstreg = R_0;
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LastReg = R_F31;
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{*****************************************************************************
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Default generic sizes
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*****************************************************************************}
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{ Defines the default address size for a processor, }
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OS_ADDR = OS_64;
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{ the natural int size for a processor, }
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OS_INT = OS_64;
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{ the maximum float size for a processor, }
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OS_FLOAT = OS_F80;
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{ the size of a vector register for a processor }
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OS_VECTOR = OS_M64;
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stack_pointer_reg = R_30;
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frame_pointer_reg = R_15;
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self_pointer_reg = R_16;
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accumulator = R_0;
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{the return_result_reg, is used inside the called function to store its return
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value when that is a scalar value otherwise a pointer to the address of the
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result is placed inside it}
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return_result_reg = accumulator;
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{the function_result_reg contains the function result after a call to a scalar
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function othewise it contains a pointer to the returned result}
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function_result_reg = accumulator;
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fpu_result_reg = R_F0;
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global_pointer = R_29;
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return_pointer = R_26;
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{ it is used to pass the offset to the destructor helper routine }
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vmt_offset_reg = R_1;
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{ low and high of the available maximum width integer general purpose }
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{ registers }
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LoGPReg = R_0;
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HiGPReg = R_31;
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{ low and high of every possible width general purpose register (same as
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above on most architctures apart from the 80x86) }
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LoReg = R_0;
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HiReg = R_31;
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{ Constant defining possibly all registers which might require saving }
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ALL_REGISTERS = [firstreg..lastreg];
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general_registers = [R_0..R_31];
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availabletempregsint = [R_0..R_14,R_16..R_25,R_28];
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availabletempregsfpu = [R_F0..R_F30];
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availabletempregsmm = [];
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intregs = [R_0..R_31];
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usableregsint = [];
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c_countusableregsint = 26;
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maxfpuregs = 32;
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fpuregs = [R_F0..R_F31];
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usableregsfpu = [];
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c_countusableregsfpu = 31;
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mmregs = [];
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usableregsmm = [];
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c_countusableregsmm = 0;
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max_operands = 4;
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registers_saved_on_cdecl = [R_9..R_14,R_F2..R_F9];
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firstsaveintreg = R_NO;
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lastsaveintreg = R_NO;
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firstsavefpureg = R_NO;
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lastsavefpureg = R_NO;
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firstsavemmreg = R_NO;
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lastsavemmreg = R_NO;
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maxvarregs = 6;
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varregs : Array [1..maxvarregs] of Tregister =
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(R_9,R_10,R_11,R_12,R_13,R_14);
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maxfpuvarregs = 8;
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{ Registers which are defined as scratch and no need to save across
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routine calls or in assembler blocks.
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}
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max_scratch_regs = 2;
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scratch_regs : array[1..max_scratch_regs] of tregister = (R_1,R_2);
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{*****************************************************************************
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GDB Information
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*****************************************************************************}
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{ Register indexes for stabs information, when some
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parameters or variables are stored in registers.
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}
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stab_regindex : array[tregister] of shortint =
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(0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0
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);
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{*****************************************************************************
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Flags
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*****************************************************************************}
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type
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{ The Alpha doesn't have flags but some generic code depends on this type. }
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TResFlags = (F_NO);
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{ reference record }
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pparareference = ^tparareference;
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tparareference = packed record
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index : tregister;
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offset : longint;
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end;
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trefoptions=(ref_none,ref_parafixup,ref_localfixup,ref_selffixup);
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TReference = record
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offset : aword;
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symbol : tasmsymbol;
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base : tregister;
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{ The index isn't used by the alpha port, but some generic code depends on it }
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index : tregister;
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is_immediate : boolean;
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offsetfixup : word; {needed for inline}
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options : trefoptions;
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{ the boundary to which the reference is surely aligned }
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alignment : byte;
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end;
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PReference = ^TReference;
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TLoc=(
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LOC_INVALID, { added for tracking problems}
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LOC_CONSTANT, { constant value }
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LOC_JUMP, { boolean results only, jump to false or true label }
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LOC_FLAGS, { boolean results only, flags are set }
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LOC_CREFERENCE, { in memory constant value reference (cannot change) }
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LOC_REFERENCE, { in memory value }
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LOC_REGISTER, { in a processor register }
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LOC_CREGISTER, { Constant register which shouldn't be modified }
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LOC_FPUREGISTER, { FPU stack }
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LOC_CFPUREGISTER, { if it is a FPU register variable on the fpu stack }
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LOC_SSEREGISTER,
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LOC_CSSEREGISTER,
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LOC_CMMREGISTER,
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LOC_MMREGISTER
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);
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{ tparamlocation describes where a parameter for a procedure is stored.
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References are given from the caller's point of view. The usual
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TLocation isn't used, because contains a lot of unnessary fields.
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}
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tparalocation = packed record
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size : TCGSize;
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loc : TLoc;
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sp_fixup : longint;
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case TLoc of
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LOC_REFERENCE : (reference : tparareference);
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{ segment in reference at the same place as in loc_register }
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LOC_REGISTER,LOC_CREGISTER : (
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case longint of
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1 : (register,register64.reghi : tregister);
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{ overlay a register64.reglo }
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2 : (register64.reglo : tregister);
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{ overlay a 64 Bit register type }
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3 : (reg64 : tregister64);
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4 : (register64 : tregister64);
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);
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end;
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tlocation = packed record
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loc : TLoc;
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size : TCGSize;
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case TLoc of
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LOC_CONSTANT : (
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case longint of
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1 : (value : AWord);
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{ can't do this, this layout depends on the host cpu. Use }
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{ lo(valueqword)/hi(valueqword) instead (JM) }
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{ 2 : (valuelow, valuehigh:AWord); }
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{ overlay a complete 64 Bit value }
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3 : (valueqword : qword);
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);
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LOC_CREFERENCE,
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LOC_REFERENCE : (reference : treference);
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{ segment in reference at the same place as in loc_register }
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LOC_REGISTER,LOC_CREGISTER : (
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case longint of
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1 : (register,register64.reghi,segment : tregister);
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{ overlay a register64.reglo }
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2 : (register64.reglo : tregister);
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{ overlay a 64 Bit register type }
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3 : (reg64 : tregister64);
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4 : (register64 : tregister64);
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);
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end;
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{*****************************************************************************
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Operands
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*****************************************************************************}
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{ Types of operand }
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toptype=(top_none,top_reg,top_ref,top_const,top_symbol);
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toper=record
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ot : longint;
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case typ : toptype of
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top_none : ();
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top_reg : (reg:tregister);
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top_ref : (ref:preference);
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top_const : (val:longint);
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top_symbol : (sym:tasmsymbol;symofs:longint);
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end;
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const
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{ Registers which must be saved when calling a routine declared as
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cppdecl, cdecl, stdcall, safecall, palmossyscall. The registers
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saved should be the ones as defined in the target ABI and / or GCC.
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This value can be deduced from the CALLED_USED_REGISTERS array in the
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GCC source.
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}
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std_saved_registers = [];
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{ Required parameter alignment when calling a routine declared as
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stdcall and cdecl. The alignment value should be the one defined
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by GCC or the target ABI.
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The value of this constant is equal to the constant
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PARM_BOUNDARY / BITS_PER_UNIT in the GCC source.
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}
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std_param_align = 8;
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{ offsets for the integer and floating point registers }
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INT_REG = 0;
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FLOAT_REG = 32;
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{ operator qualifiers }
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OQ_CHOPPED_ROUNDING = $01; { /C }
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OQ_ROUNDING_MODE_DYNAMIC = $02; { /D }
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OQ_ROUND_TOWARD_MINUS_INFINITY = $04; { /M }
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OQ_INEXACT_RESULT_ENABLE = $08; { /I }
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OQ_SOFTWARE_COMPLETION_ENABLE = $10; { /S }
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OQ_FLOATING_UNDERFLOW_ENABLE = $20; { /U }
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OQ_INTEGER_OVERFLOW_ENABLE = $40; { /V }
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{*****************************************************************************
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Opcode propeties (needed for optimizer)
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*****************************************************************************}
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{$ifndef NOOPT}
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Type
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{What an instruction can change}
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TInsChange = (Ch_None);
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{$endif}
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{ resets all values of ref to defaults }
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procedure reset_reference(var ref : treference);
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{ set mostly used values of a new reference }
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function new_reference(base : tregister;offset : longint) : preference;
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function newreference(const r : treference) : preference;
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procedure disposereference(var r : preference);
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function reg2str(r : tregister) : string;
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{*****************************************************************************
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Init/Done
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*****************************************************************************}
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procedure InitCpu;
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procedure DoneCpu;
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implementation
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uses
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verbose;
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function reg2str(r : tregister) : string;
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begin
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if r in [R_0..R_31] then
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reg2str:='R'+tostr(longint(r)-longint(R_0))
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else if r in [R_F0..R_F31] then
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reg2str:='F'+tostr(longint(r)-longint(R_F0))
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else internalerror(38991);
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end;
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procedure reset_reference(var ref : treference);
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begin
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FillChar(ref,sizeof(treference),0);
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end;
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function new_reference(base : tregister;offset : longint) : preference;
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var
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r : preference;
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begin
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new(r);
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FillChar(r^,sizeof(treference),0);
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r^.offset:=offset;
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r^.alignment:=8;
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new_reference:=r;
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end;
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function newreference(const r : treference) : preference;
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var
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p : preference;
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begin
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new(p);
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p^:=r;
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newreference:=p;
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end;
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procedure disposereference(var r : preference);
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begin
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dispose(r);
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r:=Nil;
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end;
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{*****************************************************************************
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Init/Done
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*****************************************************************************}
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procedure InitCpu;
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begin
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end;
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procedure DoneCpu;
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begin
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end;
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end.
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