{ $Id$ Copyright (c) 1998-2002 by Florian Klaempfl Generate PowerPC assembler for type converting nodes 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 nppccnv; {$i fpcdefs.inc} interface uses node,ncnv,ncgcnv,defbase; type tppctypeconvnode = class(tcgtypeconvnode) protected { procedure second_int_to_int;override; } { procedure second_string_to_string;override; } { procedure second_cstring_to_pchar;override; } { procedure second_string_to_chararray;override; } { procedure second_array_to_pointer;override; } function first_int_to_real: tnode; override; { procedure second_pointer_to_array;override; } { procedure second_chararray_to_string;override; } { procedure second_char_to_string;override; } procedure second_int_to_real;override; procedure second_real_to_real;override; { procedure second_cord_to_pointer;override; } { procedure second_proc_to_procvar;override; } { procedure second_bool_to_int;override; } procedure second_int_to_bool;override; { procedure second_load_smallset;override; } { procedure second_ansistring_to_pchar;override; } { procedure second_pchar_to_string;override; } { procedure second_class_to_intf;override; } { procedure second_char_to_char;override; } procedure pass_2;override; procedure second_call_helper(c : tconverttype); override; end; implementation uses verbose,globals,systems, symconst,symdef,aasmbase,aasmtai, cgbase,pass_1,pass_2, ncon,ncal, cpubase,aasmcpu, rgobj,tgobj,cgobj,cginfo; {***************************************************************************** FirstTypeConv *****************************************************************************} function tppctypeconvnode.first_int_to_real: tnode; var fname: string[19]; begin { converting a 64bit integer to a float requires a helper } if is_64bitint(left.resulttype.def) then begin if is_signed(left.resulttype.def) then fname := 'fpc_int64_to_double' else fname := 'fpc_qword_to_double'; result := ccallnode.createintern(fname,ccallparanode.create( left,nil)); firstpass(result); exit; end else { other integers are supposed to be 32 bit } begin if is_signed(left.resulttype.def) then inserttypeconv(left,s32bittype) else inserttypeconv(left,u32bittype); firstpass(left); end; result := inherited first_int_to_real; end; {***************************************************************************** SecondTypeConv *****************************************************************************} procedure tppctypeconvnode.second_int_to_real; type tdummyarray = packed array[0..7] of byte; {$ifdef VER1_0} var dummy1, dummy2: int64; {$else VER1_0} const dummy1: int64 = $4330000080000000; dummy2: int64 = $4330000000000000; {$endif VER1_0} var tempconst: trealconstnode; ref: treference; valuereg, tempreg, leftreg, tmpfpureg: tregister; signed, valuereg_is_scratch: boolean; begin {$ifdef VER1_0} { the "and" is because 1.0.x will sign-extend the $80000000 to } { $ffffffff80000000 when converting it to int64 (JM) } dummy1 := int64($80000000) and (int64($43300000) shl 32); dymmy2 := int64($43300000) shl 32; {$endif VER1_0} valuereg_is_scratch := false; location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def)); { the code here comes from the PowerPC Compiler Writer's Guide } { * longint to double } { addis R0,R0,0x4330 # R0 = 0x43300000 } { stw R0,disp(R1) # store upper half } { xoris R3,R3,0x8000 # flip sign bit } { stw R3,disp+4(R1) # store lower half } { lfd FR1,disp(R1) # float load double of value } { fsub FR1,FR1,FR2 # subtract 0x4330000080000000 } { * cardinal to double } { addis R0,R0,0x4330 # R0 = 0x43300000 } { stw R0,disp(R1) # store upper half } { stw R3,disp+4(R1) # store lower half } { lfd FR1,disp(R1) # float load double of value } { fsub FR1,FR1,FR2 # subtract 0x4330000000000000 } tg.gettempofsizereference(exprasmlist,8,ref); signed := is_signed(left.resulttype.def); { we need a certain constant for the conversion, so create it here } if signed then tempconst := crealconstnode.create(double(dummy1), pbestrealtype^) else tempconst := crealconstnode.create(double(dummy2), pbestrealtype^); resulttypepass(tempconst); firstpass(tempconst); secondpass(tempconst); if (tempconst.location.loc <> LOC_CREFERENCE) or { has to be handled by a helper } is_64bitint(left.resulttype.def) then internalerror(200110011); case left.location.loc of LOC_REGISTER: begin leftreg := left.location.register; valuereg := leftreg; end; LOC_CREGISTER: begin leftreg := left.location.register; if signed then begin valuereg := cg.get_scratch_reg_int(exprasmlist); valuereg_is_scratch := true; end else valuereg := leftreg; end; LOC_REFERENCE,LOC_CREFERENCE: begin leftreg := cg.get_scratch_reg_int(exprasmlist); valuereg := leftreg; valuereg_is_scratch := true; cg.a_load_ref_reg(exprasmlist,def_cgsize(left.resulttype.def), left.location.reference,leftreg); end else internalerror(200110012); end; tempreg := cg.get_scratch_reg_int(exprasmlist); exprasmlist.concat(taicpu.op_reg_const(A_LIS,tempreg,$4330)); cg.a_load_reg_ref(exprasmlist,OS_32,tempreg,ref); cg.free_scratch_reg(exprasmlist,tempreg); if signed then exprasmlist.concat(taicpu.op_reg_reg_const(A_XORIS,valuereg, leftreg,smallint($8000))); inc(ref.offset,4); cg.a_load_reg_ref(exprasmlist,OS_32,valuereg,ref); dec(ref.offset,4); if (valuereg_is_scratch) then cg.free_scratch_reg(exprasmlist,valuereg); if (left.location.loc = LOC_REGISTER) or ((left.location.loc = LOC_CREGISTER) and not signed) then rg.ungetregister(exprasmlist,leftreg) else cg.free_scratch_reg(exprasmlist,valuereg); tmpfpureg := rg.getregisterfpu(exprasmlist); exprasmlist.concat(taicpu.op_reg_ref(A_LFD,tmpfpureg, tempconst.location.reference)); tempconst.free; location.register := rg.getregisterfpu(exprasmlist); exprasmlist.concat(taicpu.op_reg_ref(A_LFD,location.register, ref)); tg.ungetiftemp(exprasmlist,ref); exprasmlist.concat(taicpu.op_reg_reg_reg(A_FSUB,location.register, location.register,tmpfpureg)); rg.ungetregisterfpu(exprasmlist,tmpfpureg); { work around bug in some PowerPC processors } if (tfloatdef(resulttype.def).typ = s32real) then exprasmlist.concat(taicpu.op_reg_reg(A_FRSP,location.register, location.register)); end; procedure tppctypeconvnode.second_real_to_real; begin inherited second_real_to_real; { work around bug in some powerpc processors where doubles aren't } { properly converted to singles } if (tfloatdef(left.resulttype.def).typ = s64real) and (tfloatdef(resulttype.def).typ = s32real) then exprasmlist.concat(taicpu.op_reg_reg(A_FRSP,location.register, location.register)); end; procedure tppctypeconvnode.second_int_to_bool; var hreg1, hreg2 : tregister; resflags : tresflags; opsize : tcgsize; begin { byte(boolean) or word(wordbool) or longint(longbool) must } { be accepted for var parameters } if (nf_explizit in flags) and (left.resulttype.def.size=resulttype.def.size) and (left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then begin location_copy(location,left.location); exit; end; location_reset(location,LOC_REGISTER,def_cgsize(left.resulttype.def)); opsize := def_cgsize(left.resulttype.def); case left.location.loc of LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER : begin if left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then begin reference_release(exprasmlist,left.location.reference); hreg2:=rg.getregisterint(exprasmlist); cg.a_load_ref_reg(exprasmlist,opsize, left.location.reference,hreg2); end else hreg2 := left.location.register; hreg1 := rg.getregisterint(exprasmlist); exprasmlist.concat(taicpu.op_reg_reg_const(A_SUBIC,hreg1, hreg2,1)); exprasmlist.concat(taicpu.op_reg_reg_reg(A_SUBFE,hreg1,hreg1, hreg2)); rg.ungetregister(exprasmlist,hreg2); end; LOC_FLAGS : begin hreg1:=rg.getregisterint(exprasmlist); resflags:=left.location.resflags; cg.g_flags2reg(exprasmlist,resflags,hreg1); end; else internalerror(10062); end; location.register := hreg1; end; procedure tppctypeconvnode.second_call_helper(c : tconverttype); const secondconvert : array[tconverttype] of pointer = ( @second_nothing, {equal} @second_nothing, {not_possible} @second_nothing, {second_string_to_string, handled in resulttype pass } @second_char_to_string, @second_nothing, {char_to_charray} @second_nothing, { pchar_to_string, handled in resulttype pass } @second_nothing, {cchar_to_pchar} @second_cstring_to_pchar, @second_ansistring_to_pchar, @second_string_to_chararray, @second_nothing, { chararray_to_string, handled in resulttype pass } @second_array_to_pointer, @second_pointer_to_array, @second_int_to_int, @second_int_to_bool, @second_bool_to_int, { bool_to_bool } @second_bool_to_int, @second_real_to_real, @second_int_to_real, @second_proc_to_procvar, @second_nothing, { arrayconstructor_to_set } @second_nothing, { second_load_smallset, handled in first pass } @second_cord_to_pointer, @second_nothing, { interface 2 string } @second_nothing, { interface 2 guid } @second_class_to_intf, @second_char_to_char, @second_nothing, { normal_2_smallset } @second_nothing { dynarray_2_openarray } ); type tprocedureofobject = procedure of object; var r : packed record proc : pointer; obj : pointer; end; begin { this is a little bit dirty but it works } { and should be quite portable too } r.proc:=secondconvert[c]; r.obj:=self; tprocedureofobject(r){$ifdef FPC}();{$endif FPC} end; procedure tppctypeconvnode.pass_2; {$ifdef TESTOBJEXT2} var r : preference; nillabel : plabel; {$endif TESTOBJEXT2} begin { this isn't good coding, I think tc_bool_2_int, shouldn't be } { type conversion (FK) } if not(convtype in [tc_bool_2_int,tc_bool_2_bool]) then begin secondpass(left); location_copy(location,left.location); if codegenerror then exit; end; second_call_helper(convtype); end; begin ctypeconvnode:=tppctypeconvnode; end. { $Log$ Revision 1.15 2002-07-21 16:57:22 jonas * hopefully final fix for second_int_to_real() Revision 1.14 2002/07/20 11:58:05 florian * types.pas renamed to defbase.pas because D6 contains a types unit so this would conflicts if D6 programms are compiled + Willamette/SSE2 instructions to assembler added Revision 1.13 2002/07/13 06:49:39 jonas * fixed fpu constants in second_int_to_real (fpu values are also stored in big endian) Revision 1.12 2002/07/12 22:02:22 florian * fixed to compile with 1.1 Revision 1.11 2002/07/11 14:41:34 florian * start of the new generic parameter handling Revision 1.10 2002/07/11 07:42:31 jonas * fixed nppccnv and enabled it - removed PPC specific second_int_to_int and use the generic one instead Revision 1.9 2002/05/20 13:30:42 carl * bugfix of hdisponen (base must be set, not index) * more portability fixes Revision 1.8 2002/05/18 13:34:26 peter * readded missing revisions Revision 1.7 2002/05/16 19:46:53 carl + defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand + try to fix temp allocation (still in ifdef) + generic constructor calls + start of tassembler / tmodulebase class cleanup Revision 1.5 2002/04/06 18:13:02 jonas * several powerpc-related additions and fixes }