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91 lines
2.9 KiB
ObjectPascal
91 lines
2.9 KiB
ObjectPascal
{
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Copyright (c) 2005 by Florian Klaempfl
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Code generation for const nodes on the AArch64
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit ncpucon;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncgcon,cpubase;
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type
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taarch64realconstnode = class(tcgrealconstnode)
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function pass_1 : tnode;override;
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procedure pass_generate_code;override;
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end;
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implementation
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uses
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verbose,
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globtype,globals,
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cpuinfo,
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aasmbase,aasmtai,aasmdata,aasmcpu,
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symdef,
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defutil,
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cgbase,cgutils,cgobj,
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procinfo,
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ncon;
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{*****************************************************************************
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TARMREALCONSTNODE
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*****************************************************************************}
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function taarch64realconstnode.pass_1 : tnode;
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begin
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result:=nil;
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if IsFloatImmediate(tfloatdef(resultdef).floattype,value_real) then
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expectloc:=LOC_MMREGISTER
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else
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result:=Inherited pass_1;
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end;
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procedure taarch64realconstnode.pass_generate_code;
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var
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hreg : TRegister;
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begin
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if IsFloatImmediate(tfloatdef(resultdef).floattype,value_real) then
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begin
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location_reset(location,LOC_MMREGISTER,def_cgsize(resultdef));
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location.register:=cg.getmmregister(current_asmdata.CurrAsmList,location.size);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_realconst(A_FMOV,
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location.register,value_real));
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end
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{ cast and compare the bit pattern as we cannot handle -0.0 }
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else if bestrealrec(value_real).Data=0 then
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begin
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location_reset(location,LOC_MMREGISTER,def_cgsize(resultdef));
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location.register:=cg.getmmregister(current_asmdata.CurrAsmList,location.size);
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hreg:=newreg(R_MMREGISTER,getsupreg(location.register),R_SUBMM16B);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_EOR,
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hreg,hreg,hreg));
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end
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else
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Inherited pass_generate_code;
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end;
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begin
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crealconstnode:=taarch64realconstnode;
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end.
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