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6b8aed593f
* small cleanups of unused variables in firstpass
* node_resources_fpu() created to get an approximation of the
required fpu registers
* for the moment use node_complexity in the CG until the
node_resource_int() is created
git-svn-id: trunk@8655 -
305 lines
13 KiB
ObjectPascal
305 lines
13 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate SPARC assembler for type converting nodes
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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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unit ncpucnv;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncnv,ncgcnv,defcmp;
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type
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tsparctypeconvnode = class(TCgTypeConvNode)
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protected
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{ procedure second_int_to_int;override; }
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{ procedure second_string_to_string;override; }
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{ procedure second_cstring_to_pchar;override; }
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{ procedure second_string_to_chararray;override; }
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{ procedure second_array_to_pointer;override; }
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function first_int_to_real: tnode; override;
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{ procedure second_pointer_to_array;override; }
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{ procedure second_chararray_to_string;override; }
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{ procedure second_char_to_string;override; }
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procedure second_int_to_real;override;
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{ procedure second_real_to_real;override; }
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{ procedure second_cord_to_pointer;override; }
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{ procedure second_proc_to_procvar;override; }
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{ procedure second_bool_to_int;override; }
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procedure second_int_to_bool;override;
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{ procedure second_load_smallset;override; }
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{ procedure second_ansistring_to_pchar;override; }
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{ procedure second_pchar_to_string;override; }
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{ procedure second_class_to_intf;override; }
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{ procedure second_char_to_char;override; }
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end;
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implementation
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uses
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verbose,globals,systems,globtype,
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symconst,symdef,aasmbase,aasmtai,aasmdata,
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defutil,
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cgbase,cgutils,pass_1,pass_2,
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ncon,ncal,procinfo,
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ncgutil,
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cpubase,aasmcpu,
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tgobj,cgobj;
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{*****************************************************************************
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FirstTypeConv
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*****************************************************************************}
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function tsparctypeconvnode.first_int_to_real: tnode;
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var
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fname: string[19];
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begin
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{ converting a 64bit integer to a float requires a helper }
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if is_64bitint(left.resultdef) or
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is_currency(left.resultdef) then
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begin
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{ hack to avoid double division by 10000, as it's
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already done by typecheckpass.resultdef_int_to_real }
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if is_currency(left.resultdef) then
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left.resultdef := s64inttype;
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if is_signed(left.resultdef) then
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fname := 'fpc_int64_to_double'
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else
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fname := 'fpc_qword_to_double';
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result := ccallnode.createintern(fname,ccallparanode.create(
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left,nil));
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left:=nil;
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firstpass(result);
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exit;
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end
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else
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{ other integers are supposed to be 32 bit }
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begin
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if is_signed(left.resultdef) then
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inserttypeconv(left,s32inttype)
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else
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inserttypeconv(left,u32inttype);
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firstpass(left);
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end;
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result := nil;
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expectloc:=LOC_FPUREGISTER;
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end;
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{*****************************************************************************
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SecondTypeConv
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*****************************************************************************}
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procedure tsparctypeconvnode.second_int_to_real;
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procedure loadsigned;
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begin
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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{ Load memory in fpu register }
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cg.a_loadfpu_ref_reg(current_asmdata.CurrAsmList,OS_F32,OS_F32,left.location.reference,location.register);
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tg.ungetiftemp(current_asmdata.CurrAsmList,left.location.reference);
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{ Convert value in fpu register from integer to float }
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case tfloatdef(resultdef).floattype of
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s32real:
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_FiTOs,location.register,location.register));
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s64real:
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_FiTOd,location.register,location.register));
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s128real:
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_FiTOq,location.register,location.register));
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else
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internalerror(200408011);
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end;
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end;
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var
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href : treference;
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hregister : tregister;
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l1,l2 : tasmlabel;
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begin
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resultdef));
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if is_signed(left.resultdef) then
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begin
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location.register:=cg.getfpuregister(current_asmdata.CurrAsmList,location.size);
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loadsigned;
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end
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else
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begin
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current_asmdata.getdatalabel(l1);
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current_asmdata.getjumplabel(l2);
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reference_reset_symbol(href,l1,0);
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hregister:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
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cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_32,left.location,hregister);
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{ here we need always an 64 bit register }
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location.register:=cg.getfpuregister(current_asmdata.CurrAsmList,OS_F64);
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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{ Load memory in fpu register }
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cg.a_loadfpu_ref_reg(current_asmdata.CurrAsmList,OS_F32,OS_F32,left.location.reference,location.register);
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tg.ungetiftemp(current_asmdata.CurrAsmList,left.location.reference);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_FiTOd,location.register,location.register));
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current_asmdata.CurrAsmList.concat(Taicpu.op_reg_reg(A_CMP,hregister,NR_G0));
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cg.a_jmp_flags(current_asmdata.CurrAsmList,F_GE,l2);
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case tfloatdef(resultdef).floattype of
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{ converting dword to s64real first and cut off at the end avoids precision loss }
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s32real,
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s64real:
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begin
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hregister:=cg.getfpuregister(current_asmdata.CurrAsmList,OS_F64);
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current_asmdata.asmlists[al_typedconsts].concat(tai_align.create(const_align(8)));
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current_asmdata.asmlists[al_typedconsts].concat(Tai_label.Create(l1));
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{ I got this constant from a test program (FK) }
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current_asmdata.asmlists[al_typedconsts].concat(Tai_const.Create_32bit($41f00000));
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current_asmdata.asmlists[al_typedconsts].concat(Tai_const.Create_32bit(0));
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cg.a_loadfpu_ref_reg(current_asmdata.CurrAsmList,OS_F64,OS_F64,href,hregister);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_FADDD,location.register,hregister,location.register));
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cg.a_label(current_asmdata.CurrAsmList,l2);
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{ cut off if we should convert to single }
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if tfloatdef(resultdef).floattype=s32real then
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begin
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hregister:=location.register;
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location.register:=cg.getfpuregister(current_asmdata.CurrAsmList,location.size);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_FDTOS,hregister,location.register));
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end;
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end;
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else
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internalerror(200410031);
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end;
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end;
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end;
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(*
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procedure tsparctypeconvnode.second_real_to_real;
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const
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conv_op : array[tfloattype,tfloattype] of tasmop = (
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{ from: s32 s64 s80 c64 cur f128 }
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{ s32 } ( A_FMOVS,A_FDTOS,A_NONE, A_NONE, A_NONE, A_NONE ),
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{ s64 } ( A_FSTOD,A_FMOVD,A_NONE, A_NONE, A_NONE, A_NONE ),
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{ s80 } ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE ),
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{ c64 } ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE ),
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{ cur } ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE ),
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{ f128 } ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE )
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);
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var
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op : tasmop;
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begin
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resultdef));
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location_force_fpureg(current_asmdata.CurrAsmList,left.location,false);
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{ Convert value in fpu register from integer to float }
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op:=conv_op[tfloatdef(resultdef).floattype,tfloatdef(left.resultdef).floattype];
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if op=A_NONE then
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internalerror(200401121);
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location.register:=cg.getfpuregister(current_asmdata.CurrAsmList,location.size);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(op,left.location.register,location.register));
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end;
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*)
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procedure tsparctypeconvnode.second_int_to_bool;
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var
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hreg1,hreg2 : tregister;
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resflags : tresflags;
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opsize : tcgsize;
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hlabel,oldTrueLabel,oldFalseLabel : tasmlabel;
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begin
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oldTrueLabel:=current_procinfo.CurrTrueLabel;
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oldFalseLabel:=current_procinfo.CurrFalseLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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secondpass(left);
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if codegenerror then
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exit;
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{ byte(boolean) or word(wordbool) or longint(longbool) must }
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{ be accepted for var parameters }
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if (nf_explicit in flags)and
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(left.resultdef.size=resultdef.size)and
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(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
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begin
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location_copy(location,left.location);
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current_procinfo.CurrTrueLabel:=oldTrueLabel;
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current_procinfo.CurrFalseLabel:=oldFalseLabel;
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exit;
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end;
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location_reset(location,LOC_REGISTER,def_cgsize(resultdef));
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opsize:=def_cgsize(left.resultdef);
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case left.location.loc of
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LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER:
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begin
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if left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
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begin
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hreg2:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
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cg.a_load_ref_reg(current_asmdata.CurrAsmList,opsize,opsize,left.location.reference,hreg2);
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end
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else
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hreg2:=left.location.register;
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{$ifndef cpu64bit}
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if left.location.size in [OS_64,OS_S64] then
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begin
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hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
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cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,OP_OR,OS_32,hreg2,tregister(succ(longint(hreg2))),hreg1);
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hreg2:=hreg1;
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opsize:=OS_32;
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end;
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{$endif cpu64bit}
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_SUBCC,NR_G0,hreg2,NR_G0));
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hreg1:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_const_reg(A_ADDX,NR_G0,0,hreg1));
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end;
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LOC_FLAGS :
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begin
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hreg1:=cg.GetIntRegister(current_asmdata.CurrAsmList,location.size);
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resflags:=left.location.resflags;
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cg.g_flags2reg(current_asmdata.CurrAsmList,location.size,resflags,hreg1);
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end;
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LOC_JUMP :
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begin
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hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
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current_asmdata.getjumplabel(hlabel);
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
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cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,1,hreg1);
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cg.a_jmp_always(current_asmdata.CurrAsmList,hlabel);
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
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cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,0,hreg1);
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cg.a_label(current_asmdata.CurrAsmList,hlabel);
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end;
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else
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internalerror(10062);
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end;
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location.register:=hreg1;
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if location.size in [OS_64, OS_S64] then
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internalerror(200408241);
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current_procinfo.CurrTrueLabel:=oldTrueLabel;
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current_procinfo.CurrFalseLabel:=oldFalseLabel;
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end;
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begin
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ctypeconvnode:=tsparctypeconvnode;
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end.
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