rtl/arm/thumb.inc


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{

    This file is part of the Free Pascal run time library.
    Copyright (c) 2013 by the Free Pascal development team.

    Processor dependent implementation for the system unit for
    ARM Thumb

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    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.

 **********************************************************************}

{$define FPC_SYSTEM_HAS_SYSINITFPU}
Procedure SysInitFPU;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$ifndef FPUNONE}
    softfloat_exception_mask:=[float_flag_underflow,float_flag_inexact,float_flag_denormal];
    softfloat_exception_flags:=[];
{$endif FPUNONE}
end;


procedure fpc_cpuinit;
begin
{$ifndef FPUNONE}
  SysInitFPU;
{$endif FPUNONE}
end;


procedure fpc_cpucodeinit;
begin
end;


{$define FPC_SYSTEM_HAS_SYSRESETFPU}
Procedure SysResetFPU;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$ifndef FPUNONE}
  softfloat_exception_flags:=[];
{$endif FPUNONE}
end;


{$IFNDEF INTERNAL_BACKTRACE}
{$define FPC_SYSTEM_HAS_GET_FRAME}
function get_frame:pointer;assembler;nostackframe;
  asm
  end;
{$ENDIF not INTERNAL_BACKTRACE}


{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer;addr:pointer=nil):pointer;assembler;
  asm
  end;


{$define FPC_SYSTEM_HAS_GET_CALLER_FRAME}
function get_caller_frame(framebp:pointer;addr:pointer=nil):pointer;assembler;
  asm
  end;


{$define FPC_SYSTEM_HAS_SPTR}
Function Sptr : pointer;assembler;
  asm
  end;


function InterLockedDecrement (var Target: longint) : longint;
  begin
    dec(Target);
    Result:=Target;
  end;


function InterLockedIncrement (var Target: longint) : longint;
  begin
    inc(Target);
    Result:=Target;
  end;


function InterLockedExchange (var Target: longint;Source : longint) : longint;
  begin
    Result:=Target;
    Target:=Source;
  end;


function InterlockedCompareExchange(var Target: longint; NewValue: longint; Comperand: longint): longint;
  begin
    Result:=Target;
    if Target=Comperand then
      Target:=NewValue;
  end;


function InterLockedExchangeAdd (var Target: longint;Source : longint) : longint;
  begin
    Result:=Target;
    inc(Target,Source);
  end;