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398 lines
12 KiB
ObjectPascal
398 lines
12 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl and Peter Vreman
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Contains the base types for MIPS
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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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{# Base unit for processor information. This unit contains
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enumerations of registers, opcodes, sizes, and other
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such things which are processor specific.
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}
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unit cpubase;
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{$i fpcdefs.inc}
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interface
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uses
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cutils,cclasses,
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globtype,globals,
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cpuinfo,
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aasmbase,
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cgbase
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;
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{*****************************************************************************
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Assembler Opcodes
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*****************************************************************************}
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type
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TAsmOp=({$i opcode.inc});
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{ This should define the array of instructions as string }
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op2strtable=array[tasmop] of string[11];
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const
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{ First value of opcode enumeration }
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firstop = low(tasmop);
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{ Last value of opcode enumeration }
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lastop = high(tasmop);
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{*****************************************************************************
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Registers
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*****************************************************************************}
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type
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{ Number of registers used for indexing in tables }
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tregisterindex=0..{$i rmipsnor.inc}-1;
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const
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{ Available Superregisters }
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{$i rmipssup.inc}
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{ No Subregisters }
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R_SUBWHOLE = R_SUBNONE;
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{ Available Registers }
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{$i rmipscon.inc}
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{ Integer Super registers first and last }
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first_int_supreg = RS_R0;
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first_int_imreg = $10;
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{ Float Super register first and last }
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first_fpu_supreg = RS_F0;
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first_fpu_imreg = $08;
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{ MM Super register first and last }
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first_mm_supreg = RS_NO;
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first_mm_imreg = RS_NO;
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{ TODO: Calculate bsstart}
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regnumber_count_bsstart = 64;
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regnumber_table : array[tregisterindex] of tregister = (
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{$i rmipsnum.inc}
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);
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regstabs_table : array[tregisterindex] of shortint = (
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{$i rmipssta.inc}
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);
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regdwarf_table : array[tregisterindex] of shortint = (
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{$i rmipsdwf.inc}
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);
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{ registers which may be destroyed by calls }
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VOLATILE_INTREGISTERS = [RS_R0..RS_R3,RS_R12..RS_R15];
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VOLATILE_FPUREGISTERS = [RS_F0..RS_F3];
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type
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totherregisterset = set of tregisterindex;
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{*****************************************************************************
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Conditions
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*****************************************************************************}
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type
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TAsmCond=(C_None,
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C_EQ, C_NE, C_LT, C_LE, C_GT, C_GE, C_LTU, C_LEU, C_GTU, C_GEU,
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C_FEQ, {Equal}
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C_FNE, {Not Equal}
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C_FGT, {Greater}
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C_FLT, {Less}
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C_FGE, {Greater or Equal}
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C_FLE {Less or Equal}
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);
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const
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cond2str : array[TAsmCond] of string[3]=('',
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'eq','ne','lt','le','gt','ge','ltu','leu','gtu','geu',
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'feq','fne','fgt','flt','fge','fle'
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);
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{*****************************************************************************
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Constants
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*****************************************************************************}
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const
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max_operands = 4;
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maxintregs = 31;
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maxfpuregs = 8;
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maxaddrregs = 0;
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{*****************************************************************************
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Operand Sizes
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*****************************************************************************}
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type
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topsize = (S_NO,
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S_B,S_W,S_L,S_BW,S_BL,S_WL,
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S_IS,S_IL,S_IQ,
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S_FS,S_FL,S_FX,S_D,S_Q,S_FV,S_FXX
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);
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{*****************************************************************************
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Constants
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*****************************************************************************}
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const
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maxvarregs = 7;
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varregs : Array [1..maxvarregs] of tsuperregister =
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(RS_R4,RS_R5,RS_R6,RS_R7,RS_R8,RS_R9,RS_R10);
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maxfpuvarregs = 4;
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fpuvarregs : Array [1..maxfpuvarregs] of tsuperregister =
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(RS_F4,RS_F5,RS_F6,RS_F7);
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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_32;
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{ the natural int size for a processor, }
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OS_INT = OS_32;
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OS_SINT = OS_S32;
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{ the maximum float size for a processor, }
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OS_FLOAT = OS_F64;
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{ the size of a vector register for a processor }
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OS_VECTOR = OS_M32;
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{*****************************************************************************
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Generic Register names
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*****************************************************************************}
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STK2_PTR = NR_R23;
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NR_GP = NR_R28;
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NR_SP = NR_R29;
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NR_S8 = NR_R30;
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NR_FP = NR_R30;
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NR_RA = NR_R31;
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RS_GP = RS_R28;
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RS_SP = RS_R29;
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RS_S8 = RS_R30;
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RS_FP = RS_R30;
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RS_RA = RS_R31;
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{# Stack pointer register }
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NR_STACK_POINTER_REG = NR_SP;
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RS_STACK_POINTER_REG = RS_SP;
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{# Frame pointer register }
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NR_FRAME_POINTER_REG = NR_FP;
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RS_FRAME_POINTER_REG = RS_FP;
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NR_RETURN_ADDRESS_REG = NR_R7;
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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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{ Results are returned in this register (32-bit values) }
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NR_FUNCTION_RETURN_REG = NR_R2;
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RS_FUNCTION_RETURN_REG = RS_R2;
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{ Low part of 64bit return value }
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NR_FUNCTION_RETURN64_LOW_REG = NR_R2;
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RS_FUNCTION_RETURN64_LOW_REG = RS_R2;
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{ High part of 64bit return value }
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NR_FUNCTION_RETURN64_HIGH_REG = NR_R3;
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RS_FUNCTION_RETURN64_HIGH_REG = RS_R3;
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{ The value returned from a function is available in this register }
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NR_FUNCTION_RESULT_REG = NR_R2;
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RS_FUNCTION_RESULT_REG = RS_R2;
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{ The lowh part of 64bit value returned from a function }
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NR_FUNCTION_RESULT64_LOW_REG = NR_R2;
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RS_FUNCTION_RESULT64_LOW_REG = RS_R2;
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{ The high part of 64bit value returned from a function }
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NR_FUNCTION_RESULT64_HIGH_REG = NR_R3;
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RS_FUNCTION_RESULT64_HIGH_REG = RS_R3;
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NR_FPU_RESULT_REG = NR_F0;
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NR_MM_RESULT_REG = NR_NO;
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NR_TCR0 = NR_R15;
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NR_TCR1 = NR_R3;
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NR_TCR10 = NR_R20;
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NR_TCR11 = NR_R21;
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NR_TCR12 = NR_R18;
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NR_TCR13 = NR_R19;
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{*****************************************************************************
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GCC /ABI linking information
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*****************************************************************************}
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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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saved_standard_registers : array[0..0] of tsuperregister =
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(RS_NO);
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{ this is only for the generic code which is not used for this architecture }
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saved_mm_registers : array[0..0] of tsuperregister = (RS_NO);
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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 = 4;
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{*****************************************************************************
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CPU Dependent Constants
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*****************************************************************************}
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const
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simm16lo = -32768;
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simm16hi = 32767;
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{*****************************************************************************
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Helpers
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*****************************************************************************}
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function inverse_cond(const c: TAsmCond): TAsmCond; {$ifdef USEINLINE}inline;{$endif USEINLINE}
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function conditions_equal(const c1, c2: TAsmCond): boolean; {$ifdef USEINLINE}inline;{$endif USEINLINE}
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{ Returns the tcgsize corresponding with the size of reg.}
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function reg_cgsize(const reg: tregister) : tcgsize;
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function cgsize2subreg(regtype: tregistertype; s:tcgsize):tsubregister;
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function is_calljmp(o:tasmop):boolean;
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function findreg_by_number(r:Tregister):tregisterindex;
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function std_regnum_search(const s:string):Tregister;
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function std_regname(r:Tregister):string;
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var
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STK2_dummy: aint;
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STK2_Localsize: aint;
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implementation
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uses
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rgBase,verbose;
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const
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std_regname_table : array[tregisterindex] of string[7] = (
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{$i rmipsstd.inc}
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);
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regnumber_index : array[tregisterindex] of tregisterindex = (
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{$i rmipsrni.inc}
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);
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std_regname_index : array[tregisterindex] of tregisterindex = (
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{$i rmipssri.inc}
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);
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function cgsize2subreg(regtype: tregistertype; s:tcgsize):tsubregister;
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begin
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if s in [OS_64,OS_S64] then
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cgsize2subreg:=R_SUBQ
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else
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cgsize2subreg:=R_SUBWHOLE;
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end;
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function reg_cgsize(const reg: tregister): tcgsize;
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begin
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case getregtype(reg) of
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R_INTREGISTER :
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reg_cgsize:=OS_32;
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R_FPUREGISTER :
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begin
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if getsubreg(reg)=R_SUBFD then
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result:=OS_F64
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else
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result:=OS_F32;
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end;
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else
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internalerror(200303181);
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end;
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end;
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function is_calljmp(o:tasmop):boolean;
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begin
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{ This isn't 100% perfect because the arm allows jumps also by writing to PC=R15.
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To overcome this problem we simply forbid that FPC generates jumps by loading R15 }
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is_calljmp:= o in [A_J,A_JAL,A_JALR,{ A_JALX, }A_JR,
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A_BEQ,A_BNE,A_BGEZ,A_BGEZAL,A_BGTZ,A_BLEZ,A_BLTZ,A_BLTZAL,
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A_BEQL,A_BGEZALL,A_BGEZL,A_BGTZL,A_BLEZL,A_BLTZALL,A_BLTZL,A_BNEL];
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end;
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function inverse_cond(const c: TAsmCond): TAsmCond; {$ifdef USEINLINE}inline;{$endif USEINLINE}
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const
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inverse: array[TAsmCond] of TAsmCond=(C_None,
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C_EQ, C_NE, C_LT, C_LE, C_GT, C_GE, C_LTU, C_LEU, C_GTU, C_GEU,
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C_FEQ, {Equal}
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C_FNE, {Not Equal}
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C_FGT, {Greater}
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C_FLT, {Less}
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C_FGE, {Greater or Equal}
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C_FLE {Less or Equal}
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);
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begin
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result := inverse[c];
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end; function findreg_by_number(r:Tregister):tregisterindex;
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begin
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result:=rgBase.findreg_by_number_table(r,regnumber_index);
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end;
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function conditions_equal(const c1, c2: TAsmCond): boolean; {$ifdef USEINLINE}inline;{$endif USEINLINE}
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begin
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result := c1 = c2;
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end;
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function std_regnum_search(const s:string):Tregister;
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begin
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result:=regnumber_table[findreg_by_name_table(s,std_regname_table,std_regname_index)];
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end;
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function std_regname(r:Tregister):string;
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var
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p : tregisterindex;
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begin
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p:=findreg_by_number_table(r,regnumber_index);
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if p<>0 then
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result:=std_regname_table[p]
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else
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result:=generic_regname(r);
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end;
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begin
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STK2_dummy := 10;
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STK2_Localsize := 0;
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end.
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