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{
Copyright (c) 2019 by Free Pascal and Lazarus foundation
Contains the assembler object for the WebAssembly
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit aasmcpu;
{$i fpcdefs.inc}
interface
uses
cclasses,
globtype,globals,verbose,
aasmbase,aasmtai,aasmdata,aasmsym,
cgbase,cgutils,cpubase,cpuinfo,
widestr;
{ fake, there are no "mov reg,reg" instructions here }
const
{ "mov reg,reg" source operand number }
O_MOV_SOURCE = 0;
{ "mov reg,reg" source operand number }
O_MOV_DEST = 0;
type
{ taicpu }
taicpu = class(tai_cpu_abstract_sym)
constructor op_none(op : tasmop);
constructor op_reg(op : tasmop;_op1 : tregister);
constructor op_const(op : tasmop;_op1 : aint);
constructor op_ref(op : tasmop;const _op1 : treference);
constructor op_sym(op : tasmop;_op1 : tasmsymbol);
constructor op_sym_const(op : tasmop;_op1 : tasmsymbol;_op2 : aint);
constructor op_single(op : tasmop;_op1 : single);
constructor op_double(op : tasmop;_op1 : double);
constructor op_functype(op : tasmop; _op1: TWasmFuncType);
procedure loadfunctype(opidx:longint;ft:TWasmFuncType);
procedure loadsingle(opidx:longint;f:single);
procedure loaddouble(opidx:longint;d:double);
{ register allocation }
function is_same_reg_move(regtype: Tregistertype):boolean; override;
{ register spilling code }
function spilling_get_operation_type(opnr: longint): topertype;override;
end;
tai_align = class(tai_align_abstract)
{ nothing to add }
end;
TImpExpType= (
ie_Func, // functions
ie_Table, // tables (arrays of methods)
ie_Memory, // memory reference
ie_Global // global variables
);
// the actual use is defined by the assembly section used
{ timpexp_ai }
tai_impexp = class(tai)
extname : ansistring; // external name
intname : ansistring; // internal name
extmodule : ansistring; // external unit name
symstype: TImpExpType;
constructor create(const aextname, aintname: ansistring; asymtype: timpexptype); overload;
constructor create(const aextmodule, aextname, aintname: ansistring; asymtype: timpexptype); overload;
end;
// local variable declaration
{ tai_local }
tai_local = class(tai)
bastyp: TWasmBasicType;
name : string;
first: boolean;
last: boolean;
constructor create(abasictype: TWasmBasicType; const aname: string = '');
end;
{ tai_functype }
tai_functype = class(tai)
funcname: string;
functype: TWasmFuncType;
constructor create(const afuncname: string; afunctype: TWasmFuncType);
destructor destroy;override;
end;
procedure InitAsm;
procedure DoneAsm;
function spilling_create_load(const ref:treference;r:tregister):Taicpu;
function spilling_create_store(r:tregister; const ref:treference):Taicpu;
implementation
{ tai_functype }
constructor tai_functype.create(const afuncname: string; afunctype: TWasmFuncType);
begin
inherited Create;
typ:=ait_functype;
funcname:=afuncname;
functype:=afunctype;
end;
destructor tai_functype.destroy;
begin
functype.free;
inherited;
end;
{ tai_local }
constructor tai_local.create(abasictype: TWasmBasicType; const aname: string);
begin
inherited Create;
bastyp := abasictype;
typ := ait_local;
name := aname;
end;
{ timpexp_ai }
constructor tai_impexp.create(const aextname, aintname: ansistring;
asymtype: timpexptype);
begin
create('', aextname, aintname, asymtype);;
end;
constructor tai_impexp.create(const aextmodule, aextname, aintname: ansistring; asymtype: timpexptype);
begin
inherited create;
typ := ait_importexport;
extmodule := aextmodule;
extname := aextname;
intname := aintname;
symstype:= asymtype;
end;
{*****************************************************************************
taicpu Constructors
*****************************************************************************}
constructor taicpu.op_none(op : tasmop);
begin
inherited create(op);
end;
constructor taicpu.op_reg(op : tasmop;_op1 : tregister);
begin
inherited create(op);
ops:=1;
{$ifdef EXTDEBUG}
if getregtype(_op1)=R_INVALIDREGISTER then
InternalError(2021011901);
{$endif EXTDEBUG}
loadreg(0,_op1);
end;
constructor taicpu.op_ref(op : tasmop;const _op1 : treference);
begin
inherited create(op);
ops:=1;
loadref(0,_op1);
if op in [a_local_get,a_local_set,a_local_tee] then
begin
if (_op1.base<>NR_LOCAL_STACK_POINTER_REG) or (_op1.index<>NR_NO) then
internalerror(2021010201);
end
else
begin
if (_op1.base<>NR_NO) or (_op1.index<>NR_NO) then
internalerror(2021010202);
end;
end;
constructor taicpu.op_const(op : tasmop;_op1 : aint);
begin
inherited create(op);
ops:=1;
loadconst(0,_op1);
end;
constructor taicpu.op_sym(op : tasmop;_op1 : tasmsymbol);
begin
inherited create(op);
ops:=1;
loadsymbol(0,_op1,0);
end;
constructor taicpu.op_sym_const(op: tasmop; _op1: tasmsymbol; _op2: aint);
begin
inherited create(op);
ops:=2;
loadsymbol(0,_op1,0);
loadconst(1,_op2);
end;
constructor taicpu.op_single(op: tasmop; _op1: single);
begin
inherited create(op);
ops:=1;
loadsingle(0,_op1);
end;
constructor taicpu.op_double(op: tasmop; _op1: double);
begin
inherited create(op);
ops:=1;
loaddouble(0,_op1);
end;
constructor taicpu.op_functype(op: tasmop; _op1: TWasmFuncType);
begin
inherited create(op);
ops:=1;
loadfunctype(0,_op1);
end;
procedure taicpu.loadfunctype(opidx: longint; ft: TWasmFuncType);
begin
allocate_oper(opidx+1);
with oper[opidx]^ do
begin
if typ<>top_functype then
clearop(opidx);
functype:=ft;
typ:=top_functype;
end;
end;
procedure taicpu.loadsingle(opidx:longint;f:single);
begin
allocate_oper(opidx+1);
with oper[opidx]^ do
begin
if typ<>top_single then
clearop(opidx);
sval:=f;
typ:=top_single;
end;
end;
procedure taicpu.loaddouble(opidx: longint; d: double);
begin
allocate_oper(opidx+1);
with oper[opidx]^ do
begin
if typ<>top_double then
clearop(opidx);
dval:=d;
typ:=top_double;
end;
end;
function taicpu.is_same_reg_move(regtype: Tregistertype):boolean;
begin
result:=false;
end;
function taicpu.spilling_get_operation_type(opnr: longint): topertype;
begin
if opcode in AsmOp_Store then
result:=operand_write
else
result:=operand_read;
end;
function spilling_create_load(const ref:treference;r:tregister):Taicpu;
begin
internalerror(2010122614);
result:=nil;
end;
function spilling_create_store(r:tregister; const ref:treference):Taicpu;
begin
internalerror(2010122615);
result:=nil;
end;
procedure InitAsm;
begin
end;
procedure DoneAsm;
begin
end;
initialization
cai_cpu:=taicpu;
cai_align:=tai_align;
casmdata:=TAsmData;
end.
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