{ Copyright (c) 1998-2010 by Florian Klaempfl and Jonas Maebe Member of the Free Pascal development team This unit implements the WebAssembly high level code generator 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 hlcgcpu; {$i fpcdefs.inc} interface uses globtype, aasmbase,aasmdata, symbase,symconst,symtype,symdef,symsym, node, cpubase, hlcgobj, cgbase, cgutils, parabase, wasmdef; type { thlcgwasm } thlcgwasm = class(thlcgobj) private fevalstackheight, fmaxevalstackheight: longint; public br_blocks: integer; loopContBr: integer; // the value is different depending of the condition test // if it's in the beggning the jump should be done to the loop (1) // if the condition at the end, the jump should done to the end of block (0) loopBreakBr: integer; exitBr: integer; fntypelookup : TWasmProcTypeLookup; constructor create; destructor Destroy; override; procedure incblock; procedure decblock; procedure incstack(list : TAsmList;slots: longint); procedure decstack(list : TAsmList;slots: longint); procedure a_load_const_cgpara(list : TAsmList;tosize : tdef;a : tcgint;const cgpara : TCGPara);override; function a_call_name(list : TAsmList;pd : tprocdef;const s : TSymStr; const paras: array of pcgpara; forceresdef: tdef; weak: boolean): tcgpara;override; function a_call_reg(list: TAsmList; pd: tabstractprocdef; reg: tregister; const paras: array of pcgpara): tcgpara; override; { move instructions - a_load_FROM_TO } procedure a_load_const_reg(list : TAsmList;tosize : tdef;a : tcgint;register : tregister);override; procedure a_load_const_ref(list : TAsmList;tosize : tdef;a : tcgint;const ref : treference);override; procedure a_load_reg_ref(list : TAsmList;fromsize, tosize : tdef;register : tregister;const ref : treference);override; procedure a_load_reg_reg(list : TAsmList;fromsize, tosize : tdef;reg1,reg2 : tregister);override; procedure a_load_ref_reg(list : TAsmList;fromsize, tosize : tdef;const ref : treference;register : tregister);override; procedure a_load_ref_ref(list : TAsmList;fromsize, tosize : tdef;const sref : treference;const dref : treference);override; procedure a_loadaddr_ref_reg(list : TAsmList;fromsize, tosize : tdef;const ref : treference;r : tregister);override; { basic arithmetic operations } procedure a_op_const_reg(list: TAsmList; Op: TOpCG; size: tdef; a: tcgint; reg: TRegister); override; procedure a_op_const_reg_reg(list: TAsmList; op: TOpCg; size: tdef; a: tcgint; src, dst: tregister); override; procedure a_op_const_ref(list: TAsmList; Op: TOpCG; size: tdef; a: tcgint; const ref: TReference); override; procedure a_op_ref_reg(list: TAsmList; Op: TOpCG; size: tdef; const ref: TReference; reg: TRegister); override; procedure a_op_reg_reg_reg(list: TAsmList; op: TOpCg; size: tdef; src1, src2, dst: tregister); override; procedure a_op_reg_reg(list: TAsmList; Op: TOpCG; size: tdef; reg1, reg2: TRegister); override; procedure a_op_const_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tdef; a: tcgint; src, dst: tregister;setflags : boolean;var ovloc : tlocation); override; procedure a_op_reg_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tdef; src1, src2, dst: tregister;setflags : boolean;var ovloc : tlocation); override; procedure a_cmp_const_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const ref: treference; l: tasmlabel); override; procedure a_cmp_const_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; reg: tregister; l: tasmlabel); override; procedure a_cmp_ref_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; l: tasmlabel); override; procedure a_cmp_reg_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; l: tasmlabel); override; procedure a_cmp_reg_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; l: tasmlabel); override; procedure a_jmp_always(list : TAsmList;l: tasmlabel); override; procedure a_loadfpu_ref_ref(list: TAsmList; fromsize, tosize: tdef; const ref1, ref2: treference); override; procedure a_loadfpu_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; reg: tregister); override; procedure a_loadfpu_reg_ref(list: TAsmList; fromsize, tosize: tdef; reg: tregister; const ref: treference); override; procedure a_loadfpu_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister); override; procedure g_concatcopy(list : TAsmList;size: tdef; const source,dest : treference); override; procedure g_proc_entry(list : TAsmList;localsize : longint;nostackframe:boolean); override; procedure g_proc_exit(list : TAsmList;parasize:longint;nostackframe:boolean); override; procedure record_generated_code_for_procdef(pd: tprocdef; code, data: TAsmList); override; procedure g_overflowcheck(list: TAsmList; const Loc: tlocation; def: tdef); override; procedure g_overflowCheck_loc(List:TAsmList;const Loc:TLocation;def:TDef;var ovloc : tlocation); override; procedure maybe_change_load_node_reg(list: TAsmList; var n: tnode; reload: boolean); override; procedure gen_entry_code(list: TAsmList); override; procedure gen_exit_code(list: TAsmList); override; { unimplemented/unnecessary routines } procedure a_bit_scan_reg_reg(list: TAsmList; reverse: boolean; srcsize, dstsize: tdef; src, dst: tregister); override; procedure a_loadmm_loc_reg(list: TAsmList; fromsize, tosize: tdef; const loc: tlocation; const reg: tregister; shuffle: pmmshuffle); override; procedure a_loadmm_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister; shuffle: pmmshuffle); override; procedure a_loadmm_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; reg: tregister; shuffle: pmmshuffle); override; procedure a_loadmm_reg_ref(list: TAsmList; fromsize, tosize: tdef; reg: tregister; const ref: treference; shuffle: pmmshuffle); override; procedure a_opmm_reg_reg(list: TAsmList; Op: TOpCG; size: tdef; src, dst: tregister; shuffle: pmmshuffle); override; procedure a_loadmm_intreg_reg(list: TAsmList; fromsize, tosize: tdef; intreg, mmreg: tregister; shuffle: pmmshuffle); override; procedure a_loadmm_reg_intreg(list: TAsmList; fromsize, tosize: tdef; mmreg, intreg: tregister; shuffle: pmmshuffle); override; procedure g_stackpointer_alloc(list: TAsmList; size: longint); override; procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint); override; procedure g_adjust_self_value(list: TAsmList; procdef: tprocdef; ioffset: aint); override; procedure g_local_unwind(list: TAsmList; l: TAsmLabel); override; { Wasm-specific routines } procedure g_procdef(list:TAsmList;pd: tprocdef); procedure a_load_stack_reg(list : TAsmList;size: tdef;reg: tregister); { extra_slots are the slots that are used by the reference, and that will be removed by the store operation } procedure a_load_stack_ref(list : TAsmList;size: tdef;const ref: treference;extra_slots: longint); procedure a_load_reg_stack(list : TAsmList;size: tdef;reg: tregister); { extra_slots are the slots that are used by the reference, and that will be removed by the load operation } procedure a_load_ref_stack(list : TAsmList;size: tdef;const ref: treference;extra_slots: longint); procedure a_load_const_stack(list : TAsmList;size: tdef;a :tcgint; typ: TRegisterType); procedure a_load_stack_loc(list : TAsmList;size: tdef;const loc: tlocation); procedure a_load_loc_stack(list : TAsmList;size: tdef;const loc: tlocation); procedure a_loadfpu_const_stack(list : TAsmList;size: tdef;a :double); procedure a_op_stack(list : TAsmList;op: topcg; size: tdef; trunc32: boolean); procedure a_op_const_stack(list : TAsmList;op: topcg; size: tdef;a : tcgint); procedure a_op_reg_stack(list : TAsmList;op: topcg; size: tdef;reg: tregister); procedure a_op_ref_stack(list : TAsmList;op: topcg; size: tdef;const ref: treference); procedure a_op_loc_stack(list : TAsmList;op: topcg; size: tdef;const loc: tlocation); procedure a_cmp_const_loc_stack(list: TAsmList; size: tdef;cmp_op: topcmp; a: tcgint; const loc: tlocation); procedure a_cmp_const_ref_stack(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const ref: treference); procedure a_cmp_const_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; reg: tregister); procedure a_cmp_ref_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister); procedure a_cmp_reg_ref_stack(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference); procedure a_cmp_reg_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister); procedure a_cmp_subsetreg_reg_stack(list: TAsmList; fromsubsetsize, cmpsize: tdef; cmp_op: topcmp; const sreg: tsubsetregister; reg: tregister); procedure a_cmp_subsetref_reg_stack(list: TAsmList; fromsubsetsize, cmpsize: tdef; cmp_op: topcmp; const sref: tsubsetreference; reg: tregister); procedure a_cmp_loc_reg_stack(list : TAsmList;size : tdef;cmp_op : topcmp; const loc: tlocation; reg : tregister); procedure a_cmp_reg_loc_stack(list : TAsmList;size : tdef;cmp_op : topcmp; reg: tregister; const loc: tlocation); procedure a_cmp_ref_loc_stack(list: TAsmList; size: tdef;cmp_op: topcmp; const ref: treference; const loc: tlocation); procedure a_cmp_const_ref_br(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const ref: treference; br: Integer); procedure a_cmp_const_reg_br(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; reg: tregister; br: Integer); procedure a_cmp_ref_reg_br(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; br: Integer); procedure a_cmp_reg_ref_br(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; br: Integer); procedure a_cmp_reg_reg_br(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; br: Integer); procedure g_reference_loc(list: TAsmList; def: tdef; const fromloc: tlocation; out toloc: tlocation); override; { this routine expects that all values are already massaged into the required form (sign bits xor'ed for gt/lt comparisons for OS_32/OS_64, see http://stackoverflow.com/questions/4068973/c-performing-signed-comparison-in-unsigned-variables-without-casting ) } procedure a_cmp_stack_stack(list : TAsmlist; size: tdef; cmp_op: topcmp); { these 2 routines perform the massaging expected by the previous one } procedure maybe_adjust_cmp_stackval(list : TAsmlist; size: tdef; cmp_op: topcmp); function maybe_adjust_cmp_constval(size: tdef; cmp_op: topcmp; a: tcgint): tcgint; { truncate/sign extend after performing operations on values < 32 bit that may have overflowed outside the range } procedure maybe_adjust_op_result(list: TAsmList; op: TOpCg; size: tdef); { performs sign/zero extension as required } procedure resize_stack_int_val(list: TAsmList;fromsize,tosize: tdef; formemstore: boolean); { 8/16 bit unsigned parameters and return values must be sign-extended on the producer side, because the JVM does not support unsigned variants; then they have to be zero-extended again on the consumer side } procedure maybe_resize_stack_para_val(list: TAsmList; retdef: tdef; callside: boolean); { adjust the stack height after a call based on the specified number of slots used for parameters and the provided resultdef } procedure g_adjust_stack_after_call(list: TAsmList; pd: tabstractprocdef; paraheight: longint; forceresdef: tdef); property maxevalstackheight: longint read fmaxevalstackheight; protected procedure gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara); override; //procedure g_copyvalueparas(p: TObject; arg: pointer); override; procedure inittempvariables(list:TAsmList);override; function g_call_system_proc_intern(list: TAsmList; pd: tprocdef; const paras: array of pcgpara; forceresdef: tdef): tcgpara; override; { in case of an array, the array base address and index have to be put on the evaluation stack before the stored value; similarly, for fields the self pointer has to be loaded first. Also checks whether the reference is valid. If dup is true, the necessary values are stored twice. Returns how many stack slots have been consumed, disregarding the "dup". } function prepare_stack_for_ref(list: TAsmList; var ref: treference; dup: boolean): longint; { return the load/store opcode to load/store from/to ref; if the result has to be and'ed after a load to get the final value, that constant is returned in finishandval (otherwise that value is set to -1) } function loadstoreopcref(def: tdef; isload: boolean; const ref: treference; out finishandval: tcgint): tasmop; { return the load/store opcode to load/store from/to reg; if the result has to be and'ed after a load to get the final value, that constant is returned in finishandval (otherwise that value is set to -1) } function loadstoreopc(def: tdef; isload, isarray: boolean; out finishandval: tcgint): tasmop; procedure resizestackfpuval(list: TAsmList; fromsize, tosize: tcgsize); { in case of an OS_32 OP_DIV, we have to use an OS_S64 OP_IDIV because the JVM does not support unsigned divisions } procedure maybepreparedivu32(list: TAsmList; var op: topcg; size: tdef; out isdivu32: boolean); end; implementation uses verbose,cutils,globals,fmodule,constexp, defutil, aasmtai,aasmcpu, symtable,symcpu, procinfo,cpuinfo,cgcpu,tgobj,tgcpu,paramgr; const TOpCG2IAsmOp : array[topcg] of TAsmOp=( A_None, {OP_NONE} A_None, {OP_MOVE, replaced operation with direct load } a_i32_add, {OP_ADD, simple addition } a_i32_and, {OP_AND, simple logical and } a_i32_div_u, {OP_DIV, simple unsigned division } a_i32_div_s, {OP_IDIV, simple signed division } a_i32_mul, {OP_IMUL, simple signed multiply } a_i32_mul, {OP_MUL, simple unsigned multiply } A_None, {OP_NEG, simple negate } // neg = xor + 1 A_None, {OP_NOT, simple logical not } // not = xor - 1 a_i32_or, {OP_OR, simple logical or } a_i32_shr_s, {OP_SAR, arithmetic shift-right } a_i32_shl, {OP_SHL, logical shift left } a_i32_shr_u, {OP_SHR, logical shift right } a_i32_sub, {OP_SUB, simple subtraction } a_i32_xor, {OP_XOR, simple exclusive or } a_i32_rotl, {OP_ROL, rotate left } a_i32_rotr {OP_ROR rotate right } ); TOpCG2LAsmOp : array[topcg] of TAsmOp=( A_None, {OP_NONE} a_i64_load, {OP_MOVE, replaced operation with direct load } a_i64_add, {OP_ADD, simple addition } a_i64_and, {OP_AND, simple logical and } a_i64_div_u, {OP_DIV, simple unsigned division } a_i64_div_s, {OP_IDIV, simple signed division } a_i64_mul, {OP_IMUL, simple signed multiply } a_i64_mul, {OP_MUL, simple unsigned multiply } A_None, {OP_NEG, simple negate } // neg = xor + 1 A_None, {OP_NOT, simple logical not } // not = xor - 1 a_i64_or, {OP_OR, simple logical or } a_i64_shr_s, {OP_SAR, arithmetic shift-right } a_i64_shl, {OP_SHL, logical shift left } a_i64_shr_u, {OP_SHR, logical shift right } a_i64_sub, {OP_SUB, simple subtraction } a_i64_xor, {OP_XOR, simple exclusive or } a_i64_rotl, {OP_ROL, rotate left } a_i64_rotr {OP_ROR rotate right } ); constructor thlcgwasm.create; begin fevalstackheight:=0; fmaxevalstackheight:=0; fntypelookup:=TWasmProcTypeLookup.Create; end; destructor thlcgwasm.Destroy; begin fntypelookup.Free; inherited Destroy; end; procedure thlcgwasm.incblock; begin inc(br_blocks); end; procedure thlcgwasm.decblock; begin dec(br_blocks); if br_blocks<0 then Internalerror(2019091807); // out of block end; procedure thlcgwasm.incstack(list: TAsmList; slots: longint); begin if slots=0 then exit; inc(fevalstackheight,slots); if (fevalstackheight>fmaxevalstackheight) then fmaxevalstackheight:=fevalstackheight; if cs_asm_regalloc in current_settings.globalswitches then list.concat(tai_comment.Create(strpnew(' allocated '+tostr(slots)+', stack height = '+tostr(fevalstackheight)))); end; procedure thlcgwasm.decstack(list: TAsmList;slots: longint); begin if slots=0 then exit; dec(fevalstackheight,slots); if (fevalstackheight<0) and not(cs_no_regalloc in current_settings.globalswitches) then internalerror(2010120501); if cs_asm_regalloc in current_settings.globalswitches then list.concat(tai_comment.Create(strpnew(' freed '+tostr(slots)+', stack height = '+tostr(fevalstackheight)))); end; procedure thlcgwasm.a_load_const_cgpara(list: TAsmList; tosize: tdef; a: tcgint; const cgpara: TCGPara); begin tosize:=get_para_push_size(tosize); if tosize=s8inttype then a:=shortint(a) else if tosize=s16inttype then a:=smallint(a); inherited a_load_const_cgpara(list, tosize, a, cgpara); end; function thlcgwasm.a_call_name(list: TAsmList; pd: tprocdef; const s: TSymStr; const paras: array of pcgpara; forceresdef: tdef; weak: boolean): tcgpara; begin list.concat(taicpu.op_sym(a_call,current_asmdata.RefAsmSymbol(s,AT_FUNCTION))); result:=get_call_result_cgpara(pd,forceresdef); end; function thlcgwasm.a_call_reg(list: TAsmList; pd: tabstractprocdef; reg: tregister; const paras: array of pcgpara): tcgpara; begin a_load_reg_stack(list, ptrsinttype, reg); current_asmdata.CurrAsmList.Concat(taicpu.op_functype(a_call_indirect,tcpuprocdef(pd).create_functype)); result:=hlcg.get_call_result_cgpara(pd, nil); end; procedure thlcgwasm.a_load_const_stack(list : TAsmList;size : tdef;a : tcgint; typ: TRegisterType); begin case typ of R_INTREGISTER, R_ADDRESSREGISTER: begin case def_cgsize(size) of OS_8,OS_16,OS_32, OS_S8,OS_S16,OS_S32: begin { convert cardinals to longints } list.concat(taicpu.op_const(a_i32_const, a)); end; OS_64,OS_S64: begin list.concat(taicpu.op_const(a_i64_const, a)); end; else internalerror(2010110702); end; end; else internalerror(2010110703); end; incstack(list,1); end; procedure thlcgwasm.a_load_stack_loc(list: TAsmList; size: tdef; const loc: tlocation); var tmpref: treference; begin case loc.loc of LOC_REGISTER,LOC_CREGISTER, LOC_FPUREGISTER,LOC_CFPUREGISTER: a_load_stack_reg(list,size,loc.register); LOC_REFERENCE: begin tmpref:=loc.reference; a_load_stack_ref(list,size,loc.reference,prepare_stack_for_ref(list,tmpref,false)); end; else internalerror(2011020501); end; end; procedure thlcgwasm.a_load_loc_stack(list: TAsmList;size: tdef;const loc: tlocation); var tmpref: treference; extra_slots: LongInt; begin case loc.loc of LOC_REGISTER,LOC_CREGISTER, LOC_FPUREGISTER,LOC_CFPUREGISTER: a_load_reg_stack(list,size,loc.register); LOC_REFERENCE,LOC_CREFERENCE: begin tmpref:=loc.reference; extra_slots:=prepare_stack_for_ref(list,tmpref,false); a_load_ref_stack(list,size,tmpref,extra_slots); end; LOC_CONSTANT: a_load_const_stack(list,size,loc.value,def2regtyp(size)); else internalerror(2011010401); end; end; procedure thlcgwasm.a_loadfpu_const_stack(list: TAsmList; size: tdef; a: double); begin case tfloatdef(size).floattype of s32real: begin list.concat(taicpu.op_single(a_f32_const, a)); incstack(list,1); end; s64real: begin list.concat(taicpu.op_double(a_f64_const,a)); incstack(list,1); end else internalerror(2011010501); end; end; procedure thlcgwasm.a_op_stack(list: TAsmList; op: topcg; size: tdef; trunc32: boolean); var cgsize: tcgsize; begin if not trunc32 then cgsize:=def_cgsize(size) else begin resize_stack_int_val(list,u32inttype,s64inttype,false); cgsize:=OS_S64; end; case cgsize of OS_8,OS_S8, OS_16,OS_S16, OS_32,OS_S32: begin { boolean not: =0? for boolean } { todo: should we also do this for cbool? } if (op=OP_NOT) and is_pasbool(size) then list.concat(taicpu.op_none(a_i32_eqz)) else begin if op=OP_NOT then begin { not = xor -1 for integer } a_load_const_stack(list,s32inttype,high(cardinal),R_INTREGISTER); op:=OP_XOR; end else if op=OP_NEG then begin { neg = *(-1) } a_load_const_stack(list,s32inttype,-1,R_INTREGISTER); op:=OP_MUL; end; if TOpCG2IAsmOp[op]=A_None then internalerror(2010120532); list.concat(taicpu.op_none(TOpCG2IAsmOp[op])); end; maybe_adjust_op_result(list,op,size); end; OS_64,OS_S64: begin { unsigned 64 bit division must be done via a helper } if op=OP_DIV then internalerror(2010120530); { boolean not: =0? for boolean } { todo: should we also do this for cbool? } if (op=OP_NOT) and is_pasbool(size) then list.concat(taicpu.op_none(a_i64_eqz)) else begin if op=OP_NOT then begin { not = xor -1 for integer } a_load_const_stack(list,s64inttype,-1,R_INTREGISTER); op:=OP_XOR; end else if op=OP_NEG then begin { neg = *(-1) } a_load_const_stack(list,s64inttype,-1,R_INTREGISTER); op:=OP_MUL; end; if TOpCG2LAsmOp[op]=A_None then internalerror(2010120533); list.concat(taicpu.op_none(TOpCG2LAsmOp[op])); end; end; else internalerror(2010120531); end; if trunc32 then begin list.concat(taicpu.op_none(a_i32_trunc_s_f32)); // todo: there are several truncs end; end; procedure thlcgwasm.a_op_const_stack(list: TAsmList;op: topcg;size: tdef;a: tcgint); var trunc32: boolean; begin maybepreparedivu32(list,op,size,trunc32); case op of OP_NEG,OP_NOT: internalerror(2011010801); OP_SHL,OP_SHR,OP_SAR: { the second argument here is an int rather than a long } a_load_const_stack(list,s32inttype,a,R_INTREGISTER); else a_load_const_stack(list,size,a,R_INTREGISTER); end; a_op_stack(list,op,size,trunc32); end; procedure thlcgwasm.a_op_reg_stack(list: TAsmList; op: topcg; size: tdef; reg: tregister); var trunc32: boolean; begin maybepreparedivu32(list,op,size,trunc32); case op of OP_SHL,OP_SHR,OP_SAR: if not is_64bitint(size) then a_load_reg_stack(list,size,reg) else begin { the second argument here is an int rather than a long } if getsubreg(reg)=R_SUBQ then internalerror(2011010802); a_load_reg_stack(list,s32inttype,reg) end else a_load_reg_stack(list,size,reg); end; a_op_stack(list,op,size,trunc32); end; procedure thlcgwasm.a_op_ref_stack(list: TAsmList; op: topcg; size: tdef; const ref: treference); var trunc32: boolean; tmpref: treference; begin { ref must not be the stack top, because that may indicate an error (it means that we will perform an operation of the stack top onto itself, so that means the two values have been loaded manually prior to calling this routine, instead of letting this routine load one of them; if something like that is needed, call a_op_stack() directly) } if ref.base=NR_EVAL_STACK_BASE then internalerror(2010121102); tmpref:=ref; maybepreparedivu32(list,op,size,trunc32); case op of OP_SHL,OP_SHR,OP_SAR: begin if not is_64bitint(size) then a_load_ref_stack(list,size,tmpref,prepare_stack_for_ref(list,tmpref,false)) else a_load_ref_stack(list,s32inttype,tmpref,prepare_stack_for_ref(list,tmpref,false)); end; else a_load_ref_stack(list,size,tmpref,prepare_stack_for_ref(list,tmpref,false)); end; a_op_stack(list,op,size,trunc32); end; procedure thlcgwasm.a_op_loc_stack(list: TAsmList; op: topcg; size: tdef; const loc: tlocation); begin case loc.loc of LOC_REGISTER,LOC_CREGISTER: a_op_reg_stack(list,op,size,loc.register); LOC_REFERENCE,LOC_CREFERENCE: a_op_ref_stack(list,op,size,loc.reference); LOC_CONSTANT: a_op_const_stack(list,op,size,loc.value); else internalerror(2011011415) end; end; procedure thlcgwasm.a_cmp_const_loc_stack(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const loc: tlocation); var tmpreg: tregister; begin case loc.loc of LOC_REGISTER,LOC_CREGISTER: a_cmp_const_reg_stack(list,size,cmp_op,a,loc.register); LOC_REFERENCE,LOC_CREFERENCE: a_cmp_const_ref_stack(list,size,cmp_op,a,loc.reference); LOC_SUBSETREG, LOC_CSUBSETREG: begin tmpreg:=getintregister(list,size); a_load_subsetreg_reg(list,size,size,loc.sreg,tmpreg); a_cmp_const_reg_stack(list,size,cmp_op,a,tmpreg); end; LOC_SUBSETREF, LOC_CSUBSETREF: begin tmpreg:=getintregister(list,size); a_load_subsetref_reg(list,size,size,loc.sref,tmpreg); a_cmp_const_reg_stack(list,size,cmp_op,a,tmpreg); end; else internalerror(2010120430); end; end; procedure thlcgwasm.a_cmp_const_ref_stack(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const ref: treference); var tmpref: treference; begin tmpref:=ref; if tmpref.base<>NR_EVAL_STACK_BASE then a_load_ref_stack(list,size,tmpref,prepare_stack_for_ref(list,tmpref,false)); maybe_adjust_cmp_stackval(list,size,cmp_op); a_load_const_stack(list,size,maybe_adjust_cmp_constval(size,cmp_op,a),def2regtyp(size)); a_cmp_stack_stack(list,size,cmp_op); end; procedure thlcgwasm.a_cmp_const_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; reg: tregister); begin a_load_reg_stack(list,size,reg); maybe_adjust_cmp_stackval(list,size,cmp_op); a_load_const_stack(list,size,maybe_adjust_cmp_constval(size,cmp_op,a),def2regtyp(size)); a_cmp_stack_stack(list,size,cmp_op); end; procedure thlcgwasm.a_cmp_ref_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister); var tmpref: treference; begin tmpref:=ref; a_load_reg_stack(list,size,reg); maybe_adjust_cmp_stackval(list,size,cmp_op); if tmpref.base<>NR_EVAL_STACK_BASE then a_load_ref_stack(list,size,tmpref,prepare_stack_for_ref(list,tmpref,false)) else begin // todo: need a swap operation? //list.concat(taicpu.op_none(a_swap)); Internalerror(2019083003); end; maybe_adjust_cmp_stackval(list,size,cmp_op); a_cmp_stack_stack(list,size,cmp_op); end; procedure thlcgwasm.a_cmp_reg_ref_stack(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference); var tmpref: treference; begin tmpref:=ref; if tmpref.base<>NR_EVAL_STACK_BASE then a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,tmpref,false)); maybe_adjust_cmp_stackval(list,size,cmp_op); a_load_reg_stack(list,size,reg); maybe_adjust_cmp_stackval(list,size,cmp_op); a_cmp_stack_stack(list,size,cmp_op); end; procedure thlcgwasm.a_cmp_reg_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister); begin a_load_reg_stack(list,size,reg2); maybe_adjust_cmp_stackval(list,size,cmp_op); a_load_reg_stack(list,size,reg1); maybe_adjust_cmp_stackval(list,size,cmp_op); a_cmp_stack_stack(list,size,cmp_op); end; procedure thlcgwasm.a_cmp_subsetreg_reg_stack(list: TAsmList; fromsubsetsize, cmpsize: tdef; cmp_op: topcmp; const sreg: tsubsetregister; reg: tregister); var tmpreg: tregister; begin tmpreg:=getintregister(list,cmpsize); a_load_subsetreg_reg(list,fromsubsetsize,cmpsize,sreg,tmpreg); a_cmp_reg_reg_stack(list,cmpsize,cmp_op,tmpreg,reg); end; procedure thlcgwasm.a_cmp_subsetref_reg_stack(list: TAsmList; fromsubsetsize, cmpsize: tdef; cmp_op: topcmp; const sref: tsubsetreference; reg: tregister); var tmpreg: tregister; begin tmpreg:=getintregister(list,cmpsize); a_load_subsetref_reg(list,fromsubsetsize,cmpsize,sref,tmpreg); a_cmp_reg_reg_stack(list,cmpsize,cmp_op,tmpreg,reg); end; procedure thlcgwasm.a_cmp_loc_reg_stack(list: TAsmList; size: tdef; cmp_op: topcmp; const loc: tlocation; reg: tregister); begin case loc.loc of LOC_REGISTER, LOC_CREGISTER: a_cmp_reg_reg_stack(list,size,cmp_op,loc.register,reg); LOC_REFERENCE, LOC_CREFERENCE : a_cmp_ref_reg_stack(list,size,cmp_op,loc.reference,reg); LOC_CONSTANT: a_cmp_const_reg_stack(list,size,cmp_op,loc.value,reg); LOC_SUBSETREG, LOC_CSUBSETREG: a_cmp_subsetreg_reg_stack(list,size,size,cmp_op,loc.sreg,reg); LOC_SUBSETREF, LOC_CSUBSETREF: a_cmp_subsetref_reg_stack(list,size,size,cmp_op,loc.sref,reg); else internalerror(2010120431); end; end; procedure thlcgwasm.a_cmp_reg_loc_stack(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const loc: tlocation); begin a_cmp_loc_reg_stack(list,size,swap_opcmp(cmp_op),loc,reg); end; procedure thlcgwasm.a_cmp_ref_loc_stack(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; const loc: tlocation); var tmpreg: tregister; begin case loc.loc of LOC_REGISTER,LOC_CREGISTER: a_cmp_ref_reg_stack(list,size,cmp_op,ref,loc.register); LOC_REFERENCE,LOC_CREFERENCE: begin tmpreg:=getintregister(list,size); a_load_ref_reg(list,size,size,loc.reference,tmpreg); a_cmp_ref_reg_stack(list,size,cmp_op,ref,tmpreg); end; LOC_CONSTANT: begin a_cmp_const_ref_stack(list,size,swap_opcmp(cmp_op),loc.value,ref); end; LOC_SUBSETREG, LOC_CSUBSETREG: begin tmpreg:=getintregister(list,size); a_load_ref_reg(list,size,size,loc.reference,tmpreg); a_cmp_subsetreg_reg_stack(list,size,size,swap_opcmp(cmp_op),loc.sreg,tmpreg); end; LOC_SUBSETREF, LOC_CSUBSETREF: begin tmpreg:=getintregister(list,size); a_load_ref_reg(list,size,size,loc.reference,tmpreg); a_cmp_subsetref_reg_stack(list,size,size,swap_opcmp(cmp_op),loc.sref,tmpreg); end; else internalerror(2010120432); end; end; procedure thlcgwasm.a_cmp_const_ref_br(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const ref: treference; br: Integer); begin a_cmp_const_ref_stack(list,size,cmp_op,a,ref); current_asmdata.CurrAsmList.concat(taicpu.op_const(a_br_if,br)); end; procedure thlcgwasm.a_cmp_const_reg_br(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; reg: tregister; br: Integer); begin a_cmp_const_reg_stack(list,size,cmp_op,a,reg); current_asmdata.CurrAsmList.concat(taicpu.op_const(a_br_if,br)); end; procedure thlcgwasm.a_cmp_ref_reg_br(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; br: Integer); begin a_cmp_ref_reg_stack(list,size,cmp_op,ref,reg); current_asmdata.CurrAsmList.concat(taicpu.op_const(a_br_if,br)); end; procedure thlcgwasm.a_cmp_reg_ref_br(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; br: Integer); begin a_cmp_reg_ref_stack(list,size,cmp_op,reg,ref); current_asmdata.CurrAsmList.concat(taicpu.op_const(a_br_if,br)); end; procedure thlcgwasm.a_cmp_reg_reg_br(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; br: Integer); begin a_cmp_reg_reg_stack(list,size,cmp_op,reg1,reg2); current_asmdata.CurrAsmList.concat(taicpu.op_const(a_br_if,br)); end; procedure thlcgwasm.g_reference_loc(list: TAsmList; def: tdef; const fromloc: tlocation; out toloc: tlocation); begin case fromloc.loc of LOC_CREFERENCE, LOC_REFERENCE: begin toloc:=fromloc; if (fromloc.reference.base<>NR_NO) and (fromloc.reference.base<>current_procinfo.framepointer) and (fromloc.reference.base<>NR_STACK_POINTER_REG) then g_allocload_reg_reg(list,voidpointertype,fromloc.reference.base,toloc.reference.base,R_ADDRESSREGISTER); end; else inherited; end; end; procedure thlcgwasm.a_cmp_stack_stack(list: TAsmlist; size: tdef; cmp_op: topcmp); const opcmp32: array[topcmp] of tasmop = ( A_None, { OC_NONE, } a_i32_eq, { OC_EQ, equality comparison } a_i32_gt_s, { OC_GT, greater than (signed) } a_i32_lt_s, { OC_LT, less than (signed) } a_i32_ge_s, { OC_GTE, greater or equal than (signed) } a_i32_le_s, { OC_LTE, less or equal than (signed) } a_i32_ne, { OC_NE, not equal } a_i32_le_u, { OC_BE, less or equal than (unsigned) } a_i32_lt_u, { OC_B, less than (unsigned) } a_i32_ge_u, { OC_AE, greater or equal than (unsigned) } a_i32_gt_u { OC_A greater than (unsigned) } ); const opcmp64: array[TOpCmp] of TAsmOp = (A_None, a_i64_eq, // OC_EQ a_i64_gt_s, a_i64_lt_s, // OC_GT, OC_LT a_i64_ge_s, a_i64_le_s, // OC_GTE, OC_LTE a_i64_ne, // OC_NE a_i64_le_u, a_i64_lt_u, // OC_BE, OC_B a_i64_ge_u, a_i64_gt_u // OC_AE, OC_A ); var cgsize: tcgsize; begin // WASM doesn't have compare+jump (to label) operation // thus even though this is a_cmp_stack_stack() // label operrand is ommited // // todo: it should NOT be ommitted when we're leaving a block // (i.e. Exit or break or continue operators) case def2regtyp(size) of R_INTREGISTER, R_ADDRESSREGISTER: begin cgsize:=def_cgsize(size); case cgsize of OS_S8,OS_8, OS_16,OS_S16, OS_S32,OS_32: begin list.concat(taicpu.op_none(opcmp32[cmp_op])); decstack(list,1); end; OS_64,OS_S64: begin list.concat(taicpu.op_none(opcmp64[cmp_op])); decstack(list,1); end; else internalerror(2010120538); end; end; else internalerror(2010120538); end; end; procedure thlcgwasm.maybe_adjust_cmp_stackval(list: TAsmlist; size: tdef; cmp_op: topcmp); begin { use cmp_op because eventually that's what indicates the signed/unsigned character of the operation, not the size... } if (cmp_op in [OC_EQ,OC_NE,OC_LT,OC_LTE,OC_GT,OC_GTE]) or (def2regtyp(size)<>R_INTREGISTER) then exit; { http://stackoverflow.com/questions/4068973/c-performing-signed-comparison-in-unsigned-variables-without-casting } case def_cgsize(size) of OS_32,OS_S32: a_op_const_stack(list,OP_XOR,size,cardinal($80000000)); OS_64,OS_S64: a_op_const_stack(list,OP_XOR,size,tcgint($8000000000000000)); else ; end; end; function thlcgwasm.maybe_adjust_cmp_constval(size: tdef; cmp_op: topcmp; a: tcgint): tcgint; begin result:=a; { use cmp_op because eventually that's what indicates the signed/unsigned character of the operation, not the size... } if (cmp_op in [OC_EQ,OC_NE,OC_LT,OC_LTE,OC_GT,OC_GTE]) or (def2regtyp(size)<>R_INTREGISTER) then exit; case def_cgsize(size) of OS_32,OS_S32: result:=a xor cardinal($80000000); OS_64,OS_S64: {$push}{$r-} result:=a xor tcgint($8000000000000000); {$pop} else ; end; end; procedure thlcgwasm.maybe_adjust_op_result(list: TAsmList; op: TOpCg; size: tdef); const overflowops = [OP_MUL,OP_SHL,OP_ADD,OP_SUB,OP_NOT,OP_NEG]; begin if (op in overflowops) and (def_cgsize(size) in [OS_8,OS_S8,OS_16,OS_S16]) then resize_stack_int_val(list,s32inttype,size,false); end; procedure thlcgwasm.gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara); begin { constructors don't return anything in Java } if pd.proctypeoption=potype_constructor then exit; { must return a value of the correct type on the evaluation stack } case def2regtyp(resdef) of R_INTREGISTER, R_ADDRESSREGISTER: a_load_const_cgpara(list,resdef,0,resloc); R_FPUREGISTER: case tfloatdef(resdef).floattype of s32real: begin list.concat(taicpu.op_single(a_f32_const, 0)); incstack(list,1); end; s64real: begin list.concat(taicpu.op_double(a_f64_const, 0)); incstack(list,1); end; else internalerror(2011010302); end else internalerror(2011010301); end; end; //procedure thlcgwasm.g_copyvalueparas(p: TObject; arg: pointer); // var // list: tasmlist; // tmpref: treference; // begin // { zero-extend < 32 bit primitive types (FPC can zero-extend when calling, // but that doesn't help when we're called from Java code or indirectly // as a procvar -- exceptions: widechar (Java-specific type) and ordinal // types whose upper bound does not set the sign bit } // if (tsym(p).typ=paravarsym) and // (tparavarsym(p).varspez in [vs_value,vs_const]) and // (tparavarsym(p).vardef.typ=orddef) and // not is_pasbool(tparavarsym(p).vardef) and // not is_widechar(tparavarsym(p).vardef) and // (tparavarsym(p).vardef.size<4) and // not is_signed(tparavarsym(p).vardef) and // (torddef(tparavarsym(p).vardef).high>=(1 shl (tparavarsym(p).vardef.size*8-1))) then // begin // list:=TAsmList(arg); // { store value in new location to keep Android verifier happy } // tg.gethltemp(list,tparavarsym(p).vardef,tparavarsym(p).vardef.size,tt_persistent,tmpref); // a_load_loc_stack(list,tparavarsym(p).vardef,tparavarsym(p).initialloc); // a_op_const_stack(list,OP_AND,tparavarsym(p).vardef,(1 shl (tparavarsym(p).vardef.size*8))-1); // a_load_stack_ref(list,tparavarsym(p).vardef,tmpref,prepare_stack_for_ref(list,tmpref,false)); // location_reset_ref(tparavarsym(p).localloc,LOC_REFERENCE,def_cgsize(tparavarsym(p).vardef),4,tmpref.volatility); // tparavarsym(p).localloc.reference:=tmpref; // end; // // inherited g_copyvalueparas(p, arg); // end; procedure thlcgwasm.inittempvariables(list: TAsmList); begin { these are automatically initialised when allocated if necessary } end; function thlcgwasm.g_call_system_proc_intern(list: TAsmList; pd: tprocdef; const paras: array of pcgpara; forceresdef: tdef): tcgpara; begin result:=inherited; pd.init_paraloc_info(callerside); g_adjust_stack_after_call(list,pd,pd.callerargareasize,forceresdef); end; function thlcgwasm.prepare_stack_for_ref(list: TAsmList; var ref: treference; dup: boolean): longint; begin result:=0; { fake location that indicates the value is already on the stack? } if (ref.base=NR_EVAL_STACK_BASE) or (ref.base=NR_LOCAL_STACK_POINTER_REG) then exit; // setting up memory offset if assigned(ref.symbol) and (ref.base=NR_NO) and (ref.index=NR_NO) then begin list.Concat(taicpu.op_const(a_i32_const,0)); incstack(list,1); if dup then begin list.Concat(taicpu.op_const(a_i32_const,0)); incstack(list,1); end; result:=1; end else if ref.index <> NR_NO then // array access begin // it's just faster to sum two of those together list.Concat(taicpu.op_reg(a_get_local, ref.base)); list.Concat(taicpu.op_reg(a_get_local, ref.index)); list.Concat(taicpu.op_none(a_i32_add)); incstack(list,1); if dup then begin list.Concat(taicpu.op_reg(a_get_local, ref.base)); list.Concat(taicpu.op_reg(a_get_local, ref.index)); list.Concat(taicpu.op_none(a_i32_add)); incstack(list,1); end; ref.base:=NR_NO; ref.index:=NR_NO; result:=1; end else if (ref.base<>NR_NO) then begin if (ref.base<>NR_STACK_POINTER_REG) then begin { regular field -> load self on the stack } a_load_reg_stack(list,voidpointertype,ref.base); if dup then a_load_reg_stack(list,voidpointertype,ref.base); { field name/type encoded in symbol, no index/offset } result:=1; ref.base:=NR_NO; end else // if (ref.base = NR_FRAME_POINTER_REG) then begin list.Concat(taicpu.op_sym(a_get_local, current_asmdata.RefAsmSymbol(FRAME_POINTER_SYM,AT_ADDR) )); end; end else begin { static field -> nothing to do here, except for validity check } {if not assigned(ref.symbol) or (ref.offset<>0) then begin internalerror(2010120525); end;} end; end; procedure thlcgwasm.a_load_const_reg(list: TAsmList; tosize: tdef; a: tcgint; register: tregister); begin a_load_const_stack(list,tosize,a,def2regtyp(tosize)); a_load_stack_reg(list,tosize,register); end; procedure thlcgwasm.a_load_const_ref(list: TAsmList; tosize: tdef; a: tcgint; const ref: treference); var extra_slots: longint; tmpref: treference; begin tmpref:=ref; extra_slots:=prepare_stack_for_ref(list,tmpref,false); a_load_const_stack(list,tosize,a,def2regtyp(tosize)); a_load_stack_ref(list,tosize,tmpref,extra_slots); end; procedure thlcgwasm.a_load_reg_ref(list: TAsmList; fromsize, tosize: tdef; register: tregister; const ref: treference); var extra_slots: longint; tmpref: treference; begin tmpref:=ref; extra_slots:=prepare_stack_for_ref(list,tmpref,false); a_load_reg_stack(list,fromsize,register); if def2regtyp(fromsize)=R_INTREGISTER then resize_stack_int_val(list,fromsize,tosize,assigned(tmpref.symbol)); a_load_stack_ref(list,tosize,tmpref,extra_slots); end; procedure thlcgwasm.a_load_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister); begin a_load_reg_stack(list,fromsize,reg1); if def2regtyp(fromsize)=R_INTREGISTER then resize_stack_int_val(list,fromsize,tosize,false); a_load_stack_reg(list,tosize,reg2); end; procedure thlcgwasm.a_load_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; register: tregister); var extra_slots: longint; tmpref: treference; begin tmpref:=ref; extra_slots:=prepare_stack_for_ref(list,tmpref,false); a_load_ref_stack(list,fromsize,tmpref,extra_slots); if def2regtyp(fromsize)=R_INTREGISTER then resize_stack_int_val(list,fromsize,tosize,false); a_load_stack_reg(list,tosize,register); end; procedure thlcgwasm.a_load_ref_ref(list: TAsmList; fromsize, tosize: tdef; const sref: treference; const dref: treference); var extra_sslots, extra_dslots: longint; tmpsref, tmpdref: treference; begin if sref.base<>NR_EVAL_STACK_BASE then begin tmpsref:=sref; tmpdref:=dref; { make sure the destination reference is on top, since in the end the order has to be "destref, value" -> first create "destref, sourceref" } extra_dslots:=prepare_stack_for_ref(list,tmpdref,false); extra_sslots:=prepare_stack_for_ref(list,tmpsref,false); a_load_ref_stack(list,fromsize,tmpsref,extra_sslots); if def2regtyp(fromsize)=R_INTREGISTER then resize_stack_int_val(list,fromsize,tosize,assigned(tmpdref.symbol)); a_load_stack_ref(list,tosize,tmpdref,extra_dslots); end else inherited; end; procedure thlcgwasm.a_loadaddr_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; r: tregister); var tmpref: treference; begin { you can't take the address of references, that are on the local stack } if (ref.base=NR_EVAL_STACK_BASE) or (ref.index=NR_EVAL_STACK_BASE) or (ref.base=NR_LOCAL_STACK_POINTER_REG) or (ref.index=NR_LOCAL_STACK_POINTER_REG) then internalerror(2021010101); tmpref:=ref; tmpref.base:=NR_NO; tmpref.index:=NR_NO; list.Concat(taicpu.op_ref(a_i32_const, tmpref)); if ref.base<>NR_NO then begin list.Concat(taicpu.op_reg(a_get_local,ref.base)); list.Concat(taicpu.op_none(a_i32_add)); end; if ref.index<>NR_NO then begin list.Concat(taicpu.op_reg(a_get_local,ref.index)); if ref.scalefactor>1 then begin list.Concat(taicpu.op_const(a_i32_const,ref.scalefactor)); list.Concat(taicpu.op_none(a_i32_mul)); end; list.Concat(taicpu.op_none(a_i32_add)); end; incstack(list, 1); a_load_stack_reg(list, tosize, r); end; procedure thlcgwasm.a_op_const_reg(list: TAsmList; Op: TOpCG; size: tdef; a: tcgint; reg: TRegister); begin a_op_const_reg_reg(list,op,size,a,reg,reg); end; procedure thlcgwasm.a_op_const_reg_reg(list: TAsmList; op: TOpCg; size: tdef; a: tcgint; src, dst: tregister); begin a_load_reg_stack(list,size,src); a_op_const_stack(list,op,size,a); a_load_stack_reg(list,size,dst); end; procedure thlcgwasm.a_op_const_ref(list: TAsmList; Op: TOpCG; size: tdef; a: tcgint; const ref: TReference); var extra_slots: longint; tmpref: treference; begin tmpref:=ref; extra_slots:=prepare_stack_for_ref(list,tmpref,true); { TODO, here or in peepholeopt: use iinc when possible } a_load_ref_stack(list,size,tmpref,extra_slots); a_op_const_stack(list,op,size,a); { for android verifier } if (def2regtyp(size)=R_INTREGISTER) and (assigned(tmpref.symbol)) then resize_stack_int_val(list,size,size,true); a_load_stack_ref(list,size,tmpref,extra_slots); end; procedure thlcgwasm.a_op_ref_reg(list: TAsmList; Op: TOpCG; size: tdef; const ref: TReference; reg: TRegister); begin if not(op in [OP_NOT,OP_NEG]) then a_load_reg_stack(list,size,reg); a_op_ref_stack(list,op,size,ref); a_load_stack_reg(list,size,reg); end; procedure thlcgwasm.a_op_reg_reg_reg(list: TAsmList; op: TOpCg; size: tdef; src1, src2, dst: tregister); begin if not(op in [OP_NOT,OP_NEG]) then a_load_reg_stack(list,size,src2); a_op_reg_stack(list,op,size,src1); a_load_stack_reg(list,size,dst); end; procedure thlcgwasm.a_op_reg_reg(list: TAsmList; Op: TOpCG; size: tdef; reg1, reg2: TRegister); begin a_op_reg_reg_reg(list,op,size,reg1,reg2,reg2); end; procedure thlcgwasm.a_op_const_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tdef; a: tcgint; src, dst: tregister; setflags: boolean; var ovloc: tlocation); var tmpreg: tregister; begin if not setflags then begin inherited; exit; end; tmpreg:=getintregister(list,size); a_load_const_reg(list,size,a,tmpreg); a_op_reg_reg_reg_checkoverflow(list,op,size,tmpreg,src,dst,true,ovloc); end; procedure thlcgwasm.a_op_reg_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tdef; src1, src2, dst: tregister; setflags: boolean; var ovloc: tlocation); var orgsrc1, orgsrc2: tregister; docheck: boolean; lab: tasmlabel; begin if not setflags then begin inherited; exit; end; { anything else cannot overflow } docheck:=size.size in [4,8]; if docheck then begin orgsrc1:=src1; orgsrc2:=src2; if src1=dst then begin orgsrc1:=getintregister(list,size); a_load_reg_reg(list,size,size,src1,orgsrc1); end; if src2=dst then begin orgsrc2:=getintregister(list,size); a_load_reg_reg(list,size,size,src2,orgsrc2); end; end; a_op_reg_reg_reg(list,op,size,src1,src2,dst); if docheck then begin { * signed overflow for addition iff - src1 and src2 are negative and result is positive (excep in case of subtraction, then sign of src1 has to be inverted) - src1 and src2 are positive and result is negative -> Simplified boolean equivalent (in terms of sign bits): not(src1 xor src2) and (src1 xor dst) for subtraction, multiplication: invert src1 sign bit for division: handle separately (div by zero, low(inttype) div -1), not supported by this code * unsigned overflow iff carry out, aka dst < src1 or dst < src2 } location_reset(ovloc,LOC_REGISTER,OS_S32); { not pasbool8, because then we'd still have to convert the integer to a boolean via branches for Dalvik} ovloc.register:=getintregister(list,s32inttype); if not ((size.typ=pointerdef) or ((size.typ=orddef) and (torddef(size).ordtype in [u64bit,u16bit,u32bit,u8bit,uchar, pasbool1,pasbool8,pasbool16,pasbool32,pasbool64]))) then begin a_load_reg_stack(list,size,src1); if op in [OP_SUB,OP_IMUL] then a_op_stack(list,OP_NOT,size,false); a_op_reg_stack(list,OP_XOR,size,src2); a_op_stack(list,OP_NOT,size,false); a_load_reg_stack(list,size,src1); a_op_reg_stack(list,OP_XOR,size,dst); a_op_stack(list,OP_AND,size,false); a_op_const_stack(list,OP_SHR,size,(size.size*8)-1); if size.size=8 then begin //todo: any operands needed? list.concat(taicpu.op_none(a_i32_wrap_i64)); end; end else begin a_load_const_stack(list,s32inttype,0,R_INTREGISTER); current_asmdata.getjumplabel(lab); { can be optimized by removing duplicate xor'ing to convert dst from signed to unsigned quadrant } a_cmp_reg_reg_label(list,size,OC_B,dst,src1,lab); a_cmp_reg_reg_label(list,size,OC_B,dst,src2,lab); a_op_const_stack(list,OP_XOR,s32inttype,1); a_label(list,lab); end; a_load_stack_reg(list,s32inttype,ovloc.register); end else ovloc.loc:=LOC_VOID; end; procedure thlcgwasm.a_cmp_const_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; const ref: treference; l: tasmlabel); begin internalerror(2021011802); end; procedure thlcgwasm.a_cmp_const_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: tcgint; reg: tregister; l: tasmlabel); begin internalerror(2021011802); end; procedure thlcgwasm.a_cmp_ref_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; l: tasmlabel); begin internalerror(2021011802); end; procedure thlcgwasm.a_cmp_reg_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; l: tasmlabel); begin internalerror(2021011802); end; procedure thlcgwasm.a_cmp_reg_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; l: tasmlabel); begin internalerror(2021011802); end; procedure thlcgwasm.a_jmp_always(list: TAsmList; l: tasmlabel); begin if l=current_procinfo.CurrBreakLabel then list.concat(taicpu.op_const(a_br,br_blocks-loopBreakBr)) else if l=current_procinfo.CurrContinueLabel then list.concat(taicpu.op_const(a_br,br_blocks-loopContBr)) else if l=current_procinfo.CurrExitLabel then list.concat(taicpu.op_const(a_br,br_blocks-exitBr)) else Internalerror(2019091806); // unexpected jump end; procedure thlcgwasm.a_loadfpu_ref_ref(list: TAsmList; fromsize, tosize: tdef; const ref1, ref2: treference); var dstack_slots: longint; tmpref1, tmpref2: treference; begin tmpref1:=ref1; tmpref2:=ref2; dstack_slots:=prepare_stack_for_ref(list,tmpref2,false); a_load_ref_stack(list,fromsize,tmpref1,prepare_stack_for_ref(list,tmpref1,false)); resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize)); a_load_stack_ref(list,tosize,tmpref2,dstack_slots); end; procedure thlcgwasm.a_loadfpu_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; reg: tregister); var tmpref: treference; begin tmpref:=ref; a_load_ref_stack(list,fromsize,tmpref,prepare_stack_for_ref(list,tmpref,false)); resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize)); a_load_stack_reg(list,tosize,reg); end; procedure thlcgwasm.a_loadfpu_reg_ref(list: TAsmList; fromsize, tosize: tdef; reg: tregister; const ref: treference); var dstack_slots: longint; tmpref: treference; begin tmpref:=ref; dstack_slots:=prepare_stack_for_ref(list,tmpref,false); a_load_reg_stack(list,fromsize,reg); resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize)); a_load_stack_ref(list,tosize,tmpref,dstack_slots); end; procedure thlcgwasm.a_loadfpu_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister); begin a_load_reg_stack(list,fromsize,reg1); resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize)); a_load_stack_reg(list,tosize,reg2); end; procedure thlcgwasm.g_concatcopy(list: TAsmList; size: tdef; const source, dest: treference); var pd: tprocdef; cgpara1,cgpara2,cgpara3 : TCGPara; begin if (source.base=NR_EVAL_STACK_BASE) or (source.base=NR_LOCAL_STACK_POINTER_REG) or (source.index=NR_EVAL_STACK_BASE) or (source.index=NR_LOCAL_STACK_POINTER_REG) or (dest.base=NR_EVAL_STACK_BASE) or (dest.base=NR_LOCAL_STACK_POINTER_REG) or (dest.index=NR_EVAL_STACK_BASE) or (dest.index=NR_LOCAL_STACK_POINTER_REG) or (size.size in [1,2,4,8]) then inherited else begin pd:=search_system_proc('MOVE'); cgpara1.init; cgpara2.init; cgpara3.init; paramanager.getcgtempparaloc(list,pd,1,cgpara1); paramanager.getcgtempparaloc(list,pd,2,cgpara2); paramanager.getcgtempparaloc(list,pd,3,cgpara3); if pd.is_pushleftright then begin { load source } a_loadaddr_ref_cgpara(list,voidtype,source,cgpara1); { load destination } a_loadaddr_ref_cgpara(list,voidtype,dest,cgpara2); { load size } a_load_const_cgpara(list,sizesinttype,size.size,cgpara3); end else begin { load size } a_load_const_cgpara(list,sizesinttype,size.size,cgpara3); { load destination } a_loadaddr_ref_cgpara(list,voidtype,dest,cgpara2); { load source } a_loadaddr_ref_cgpara(list,voidtype,source,cgpara1); end; paramanager.freecgpara(list,cgpara3); paramanager.freecgpara(list,cgpara2); paramanager.freecgpara(list,cgpara1); g_call_system_proc(list,pd,[@cgpara1,@cgpara2,@cgpara3],nil).resetiftemp; cgpara3.done; cgpara2.done; cgpara1.done; end; end; procedure thlcgwasm.g_proc_entry(list: TAsmList; localsize: longint; nostackframe: boolean); var pd: tcpuprocdef; begin pd:=tcpuprocdef(current_procinfo.procdef); g_procdef(list,pd); ttgwasm(tg).allocframepointer(list,pd.frame_pointer_ref); ttgwasm(tg).allocbasepointer(list,pd.base_pointer_ref); { the localsize is based on tg.lasttemp -> already in terms of stack slots rather than bytes } //list.concat(tai_directive.Create(asd_jlimit,'locals '+tostr(localsize))); { we insert the unit initialisation code afterwards in the proginit code, and it uses one stack slot } //if (current_procinfo.procdef.proctypeoption=potype_proginit) then //fmaxevalstackheight:=max(1,fmaxevalstackheight); list.Concat(tai_local.create(wbt_i32,FRAME_POINTER_SYM)); //TWasmBasicType list.Concat(tai_local.create(wbt_i32,BASE_POINTER_SYM)); //TWasmBasicType list.Concat(taicpu.op_sym(a_get_global,current_asmdata.RefAsmSymbol(STACK_POINTER_SYM,AT_LABEL))); incstack(list,1); list.Concat(taicpu.op_ref(a_set_local,pd.base_pointer_ref)); decstack(list,1); if (localsize>0) then begin list.Concat(taicpu.op_ref(a_get_local,pd.base_pointer_ref)); incstack(list,1); list.concat(taicpu.op_const(a_i32_const, localsize )); incstack(list,1); list.concat(taicpu.op_none(a_i32_sub)); decstack(list,1); list.Concat(taicpu.op_ref(a_set_local,pd.frame_pointer_ref)); decstack(list,1); list.Concat(taicpu.op_ref(a_get_local,pd.frame_pointer_ref)); incstack(list,1); list.Concat(taicpu.op_sym(a_set_global,current_asmdata.RefAsmSymbol(STACK_POINTER_SYM,AT_LABEL))); decstack(list,1); end; //list.concat(tai_directive.Create(asd_jlimit,'stack '+tostr(fmaxevalstackheight))); end; procedure thlcgwasm.g_proc_exit(list: TAsmList; parasize: longint; nostackframe: boolean); var pd: tcpuprocdef; begin pd:=tcpuprocdef(current_procinfo.procdef); list.Concat(taicpu.op_ref(a_get_local,pd.base_pointer_ref)); incstack(list,1); list.Concat(taicpu.op_sym(a_set_global,current_asmdata.RefAsmSymbol(STACK_POINTER_SYM,AT_LABEL))); decstack(list,1); list.concat(taicpu.op_none(a_return)); list.concat(taicpu.op_none(a_end_function)); end; procedure thlcgwasm.record_generated_code_for_procdef(pd: tprocdef; code, data: TAsmList); begin { add something to the al_procedures list as well, because if all al_* lists are empty, the assembler writer isn't called } if not code.empty and current_asmdata.asmlists[al_procedures].empty then current_asmdata.asmlists[al_procedures].concat(tai_align.Create(4)); tcpuprocdef(pd).exprasmlist:=TAsmList.create; new_section(tcpuprocdef(pd).exprasmlist,sec_code,lower(pd.mangledname),current_settings.alignment.procalign); tcpuprocdef(pd).exprasmlist.concatlist(code); if assigned(data) and not data.empty then internalerror(2010122801); end; procedure thlcgwasm.g_overflowcheck(list: TAsmList; const Loc: tlocation; def: tdef); begin { not possible, need the original operands } internalerror(2012102101); end; procedure thlcgwasm.g_overflowCheck_loc(List: TAsmList; const Loc: TLocation; def: TDef; var ovloc: tlocation); var hl : tasmlabel; begin if not(cs_check_overflow in current_settings.localswitches) then exit; current_asmdata.getjumplabel(hl); a_cmp_const_loc_label(list,s32inttype,OC_EQ,0,ovloc,hl); g_call_system_proc(list,'fpc_overflow',[],nil); a_label(list,hl); end; procedure thlcgwasm.maybe_change_load_node_reg(list: TAsmList; var n: tnode; reload: boolean); begin { don't do anything, all registers become stack locations anyway } end; procedure thlcgwasm.gen_entry_code(list: TAsmList); begin list.concat(Tai_force_line.Create); { todo: inherited? } list.concat(taicpu.op_none(a_block)); incblock; exitBr:=br_blocks; end; procedure thlcgwasm.gen_exit_code(list: TAsmList); begin list.concat(taicpu.op_none(a_end_block)); decblock; { todo: inherited? } end; procedure thlcgwasm.a_bit_scan_reg_reg(list: TAsmList; reverse: boolean; srcsize, dstsize: tdef; src, dst: tregister); begin internalerror(2012090201); end; procedure thlcgwasm.a_loadmm_loc_reg(list: TAsmList; fromsize, tosize: tdef; const loc: tlocation; const reg: tregister; shuffle: pmmshuffle); begin internalerror(2012090202); end; procedure thlcgwasm.a_loadmm_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister; shuffle: pmmshuffle); begin internalerror(2012060130); end; procedure thlcgwasm.a_loadmm_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; reg: tregister; shuffle: pmmshuffle); begin internalerror(2012060131); end; procedure thlcgwasm.a_loadmm_reg_ref(list: TAsmList; fromsize, tosize: tdef; reg: tregister; const ref: treference; shuffle: pmmshuffle); begin internalerror(2012060132); end; procedure thlcgwasm.a_opmm_reg_reg(list: TAsmList; Op: TOpCG; size: tdef; src, dst: tregister; shuffle: pmmshuffle); begin internalerror(2012060133); end; procedure thlcgwasm.a_loadmm_intreg_reg(list: TAsmList; fromsize, tosize: tdef; intreg, mmreg: tregister; shuffle: pmmshuffle); begin internalerror(2012060134); end; procedure thlcgwasm.a_loadmm_reg_intreg(list: TAsmList; fromsize, tosize: tdef; mmreg, intreg: tregister; shuffle: pmmshuffle); begin internalerror(2012060135); end; procedure thlcgwasm.g_stackpointer_alloc(list: TAsmList; size: longint); begin internalerror(2012090203); end; procedure thlcgwasm.g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint); begin internalerror(2012090204); end; procedure thlcgwasm.g_adjust_self_value(list: TAsmList; procdef: tprocdef; ioffset: aint); begin internalerror(2012090205); end; procedure thlcgwasm.g_local_unwind(list: TAsmList; l: TAsmLabel); begin internalerror(2012090206); end; procedure thlcgwasm.g_procdef(list: TAsmList; pd: tprocdef); begin list.Concat(tai_functype.create(pd.mangledname,tcpuprocdef(pd).create_functype)); end; procedure thlcgwasm.a_load_stack_reg(list: TAsmList; size: tdef; reg: tregister); var opc: tasmop; finishandval: tcgint; begin opc:=loadstoreopc(size,false,false,finishandval); list.concat(taicpu.op_reg(opc,reg)); { avoid problems with getting the size of an open array etc } if wasmAlwayInMem(size) then size:=ptruinttype; decstack(list,1); end; procedure thlcgwasm.a_load_stack_ref(list: TAsmList; size: tdef; const ref: treference; extra_slots: longint); var opc: tasmop; finishandval: tcgint; begin { fake location that indicates the value has to remain on the stack } if ref.base=NR_EVAL_STACK_BASE then exit; opc:=loadstoreopcref(size,false,ref,finishandval); list.concat(taicpu.op_ref(opc,ref)); { avoid problems with getting the size of an open array etc } if wasmAlwayInMem(size) then size:=ptruinttype; decstack(list,1+extra_slots); end; procedure thlcgwasm.a_load_reg_stack(list: TAsmList; size: tdef; reg: tregister); var opc: tasmop; finishandval: tcgint; begin opc:=loadstoreopc(size,true,false,finishandval); list.concat(taicpu.op_reg(opc,reg)); { avoid problems with getting the size of an open array etc } if wasmAlwayInMem(size) then size:=ptruinttype; incstack(list,1); if finishandval<>-1 then a_op_const_stack(list,OP_AND,size,finishandval); end; procedure thlcgwasm.a_load_ref_stack(list: TAsmList; size: tdef; const ref: treference; extra_slots: longint); var opc: tasmop; finishandval: tcgint; begin { fake location that indicates the value is already on the stack? } if (ref.base=NR_EVAL_STACK_BASE) then exit; opc:=loadstoreopcref(size,true,ref,finishandval); list.concat(taicpu.op_ref(opc,ref)); { avoid problems with getting the size of an open array etc } if wasmAlwayInMem(size) then size:=ptruinttype; incstack(list,1-extra_slots); if finishandval<>-1 then a_op_const_stack(list,OP_AND,size,finishandval); // there's no cast check in Wasm //if ref.checkcast then // gen_typecheck(list,a_checkcast,size); end; function thlcgwasm.loadstoreopcref(def: tdef; isload: boolean; const ref: treference; out finishandval: tcgint): tasmop; const {iisload} {issigned} getputmem8 : array [boolean, boolean] of TAsmOp = ((a_i32_store8, a_i32_store8), (a_i32_load8_u, a_i32_load8_s)); getputmem16 : array [boolean, boolean] of TAsmOp = ((a_i32_store16, a_i32_store16), (a_i32_load16_u ,a_i32_load16_s)); getputmem32 : array [boolean, boolean] of TAsmOp = ((a_i32_store, a_i32_store), (a_i32_load, a_i32_load)); getputmem64 : array [boolean, boolean] of TAsmOp = ((a_i64_store, a_i64_store), (a_i64_load, a_i64_load)); getputmemf32 : array [boolean] of TAsmOp = (a_f32_store, a_f32_load); getputmemf64 : array [boolean] of TAsmOp = (a_f64_store, a_f64_load); begin if (ref.base<>NR_LOCAL_STACK_POINTER_REG) or assigned(ref.symbol) then begin { -> either a global (static) field, or a regular field. If a regular field, then ref.base contains the self pointer, otherwise ref.base=NR_NO. In both cases, the symbol contains all other information (combined field name and type descriptor) } case def.size of 1: result := getputmem8[isload, is_signed(def)]; 2: result := getputmem16[isload, is_signed(def)]; 4: if is_single(def) then result := getputmemf32[isload] else result := getputmem32[isload, is_signed(def)]; 8: if is_double(def) then result := getputmemf64[isload] else result := getputmem64[isload, is_signed(def)]; else Internalerror(2019091501); end; //result:=getputopc[isload,ref.base=NR_NO]; finishandval:=-1; { erase sign extension for byte/smallint loads } if (def2regtyp(def)=R_INTREGISTER) and not is_signed(def) and (def.typ=orddef) and not is_widechar(def) then case def.size of 1: if (torddef(def).high>127) then finishandval:=255; 2: if (torddef(def).high>32767) then finishandval:=65535; end; end else result:=loadstoreopc(def,isload,false,finishandval); end; function thlcgwasm.loadstoreopc(def: tdef; isload, isarray: boolean; out finishandval: tcgint): tasmop; var size: longint; begin finishandval:=-1; if isload then result := a_get_local else result := a_set_local; {case def2regtyp(def) of R_INTREGISTER: begin size:=def.size; case size of 1,2,3,4: if isload then result:=a_i32_load else result:=a_i32_store; 8: if isload then result:=a_i64_load else result:=a_i64_store; else internalerror(2011032814); end; end; R_ADDRESSREGISTER: if isload then result:=a_i32_load else result:=a_i32_store; R_FPUREGISTER: begin case tfloatdef(def).floattype of s32real: if isload then result:=a_f32_load else result:=a_f32_store; s64real: if isload then result:=a_f32_load else result:=a_f32_store else internalerror(2010120504); end end else internalerror(2010120502); end;} end; procedure thlcgwasm.resize_stack_int_val(list: TAsmList; fromsize, tosize: tdef; formemstore: boolean); var fromcgsize, tocgsize: tcgsize; begin { When storing to an array, field or global variable, make sure the static type verification can determine that the stored value fits within the boundaries of the declared type (to appease the Dalvik VM). Local variables either get their type upgraded in the debug info, or have no type information at all } if formemstore and (tosize.typ=orddef) then if (torddef(tosize).ordtype in [u8bit,uchar]) then tosize:=s8inttype else if torddef(tosize).ordtype=u16bit then tosize:=s16inttype; fromcgsize:=def_cgsize(fromsize); tocgsize:=def_cgsize(tosize); if fromcgsize in [OS_S64,OS_64] then begin if not(tocgsize in [OS_S64,OS_64]) then begin { truncate } list.concat(taicpu.op_none(a_i32_wrap_i64)); end; end else if tocgsize in [OS_S64,OS_64] then begin { extend } case fromcgsize of OS_8: begin a_op_const_stack(list,OP_AND,s32inttype,255); list.concat(taicpu.op_none(a_i64_extend_u_i32)); end; OS_S8: list.concat(taicpu.op_none(a_i64_extend_s_8)); OS_16: begin a_op_const_stack(list,OP_AND,s32inttype,65535); list.concat(taicpu.op_none(a_i64_extend_u_i32)); end; OS_S16: list.concat(taicpu.op_none(a_i64_extend_s_16)); OS_32: list.concat(taicpu.op_none(a_i64_extend_u_i32)); OS_S32: list.concat(taicpu.op_none(a_i64_extend_s_i32)); OS_64,OS_S64: ; else internalerror(2021010301); end; end; { Conversions between 32 and 64 bit types have been completely handled above. We still may have to truncate or sign extend in case the destination type is smaller that the source type, or has a different sign. In case the destination is a widechar and the source is not, we also have to insert a conversion to widechar. } case fromcgsize of OS_8: a_op_const_stack(list,OP_AND,s32inttype,255); OS_S8: list.concat(taicpu.op_none(a_i32_extend_s_8)); OS_16: a_op_const_stack(list,OP_AND,s32inttype,65535); OS_S16: list.concat(taicpu.op_none(a_i32_extend_s_16)); OS_32,OS_S32,OS_64,OS_S64: ; else internalerror(2021010302); end; end; procedure thlcgwasm.maybe_resize_stack_para_val(list: TAsmList; retdef: tdef; callside: boolean); var convsize: tdef; begin if (retdef.typ=orddef) then begin if (torddef(retdef).ordtype in [u8bit,u16bit,uchar]) and (torddef(retdef).high>=(1 shl (retdef.size*8-1))) then begin convsize:=nil; if callside then if torddef(retdef).ordtype in [u8bit,uchar] then convsize:=s8inttype else convsize:=s16inttype else if torddef(retdef).ordtype in [u8bit,uchar] then convsize:=u8inttype else convsize:=u16inttype; if assigned(convsize) then resize_stack_int_val(list,s32inttype,convsize,false); end; end; end; procedure thlcgwasm.g_adjust_stack_after_call(list: TAsmList; pd: tabstractprocdef; paraheight: longint; forceresdef: tdef); var totalremovesize: longint; realresdef: tdef; begin if not assigned(forceresdef) then realresdef:=pd.returndef else realresdef:=forceresdef; { a constructor doesn't actually return a value in the jvm } if (tabstractprocdef(pd).proctypeoption=potype_constructor) then totalremovesize:=paraheight else { even a byte takes up a full stackslot -> align size to multiple of 4 } totalremovesize:=paraheight-(align(realresdef.size,4) shr 2); { remove parameters from internal evaluation stack counter (in case of e.g. no parameters and a result, it can also increase) } if totalremovesize>0 then decstack(list,totalremovesize) else if totalremovesize<0 then incstack(list,-totalremovesize); end; procedure thlcgwasm.resizestackfpuval(list: TAsmList; fromsize, tosize: tcgsize); begin if (fromsize=OS_F32) and (tosize=OS_F64) then begin list.concat(taicpu.op_none(a_f64_promote_f32)); end else if (fromsize=OS_F64) and (tosize=OS_F32) then begin list.concat(taicpu.op_none(a_f32_demote_f64)); end; end; procedure thlcgwasm.maybepreparedivu32(list: TAsmList; var op: topcg; size: tdef; out isdivu32: boolean); begin if (op=OP_DIV) and (def_cgsize(size)=OS_32) then begin { needs zero-extension to 64 bit, because the JVM only supports signed divisions } resize_stack_int_val(list,u32inttype,s64inttype,false); op:=OP_IDIV; isdivu32:=true; end else isdivu32:=false; end; procedure create_hlcodegen_cpu; begin hlcg:=thlcgwasm.create; create_codegen; end; initialization chlcgobj:=thlcgwasm; create_hlcodegen:=@create_hlcodegen_cpu; end.