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* implemented several i8086 procs, some are stubs/not yet implemented

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git-svn-id: branches/i8086@23862 -
This commit is contained in:
nickysn 2013-03-16 13:52:28 +00:00
parent 8cb0f96200
commit d2cd13a5c9
1 changed files with 72 additions and 0 deletions
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72
rtl/i8086/i8086.inc
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@ -17,3 +17,75 @@
procedure fpc_cpuinit;
begin
end;
{$define FPC_SYSTEM_HAS_SPTR}
Function Sptr : Pointer;assembler;nostackframe;
asm
mov ax, sp
end;
{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer;addr:pointer=nil):pointer;nostackframe;assembler;
asm
or ax, ax
jz @@Lg_a_null
xchg ax, bx
mov bx, [bx+2]
xchg ax, bx
@@Lg_a_null:
end;
{$define FPC_SYSTEM_HAS_GET_CALLER_FRAME}
function get_caller_frame(framebp:pointer;addr:pointer=nil):pointer;nostackframe;assembler;
asm
or ax, ax
jz @@Lgnf_null
xchg ax, bx
mov bx, [bx]
xchg ax, bx
@@Lgnf_null:
end;
{TODO: fix, use smallint?}
function InterLockedDecrement (var Target: longint) : longint; assembler;
asm
push bx
mov bx, ax
sub word [bx], 1
sbb word [bx+2], 0
mov ax, [bx]
mov dx, [bx+2]
pop bx
end;
{TODO: fix, use smallint?}
function InterLockedIncrement (var Target: longint) : longint; assembler;
asm
push bx
mov bx, ax
add word [bx], 1
adc word [bx+2], 0
mov ax, [bx]
mov dx, [bx+2]
pop bx
end;
{TODO: fix, use smallint?}
function InterLockedExchange (var Target: longint;Source : longint) : longint;
begin
InterLockedExchange := Target;
Target := Source;
end;
{TODO: implement}
function InterLockedExchangeAdd (var Target: longint;Source : longint) : longint;
begin
runerror(304);
end;
{TODO: implement}
function InterlockedCompareExchange(var Target: longint; NewValue: longint; Comperand: longint): longint;
begin
runerror(304);
end;