paweld/lazarus
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/lazarus/lazarus.git synced 2025-08-14 09:59:20 +02:00
Code Issues Packages Projects Releases Wiki Activity

aggpas: replaced some asm with pas

Browse Source 
git-svn-id: trunk@35845 -
This commit is contained in:
mattias 2012-03-09 14:46:05 +00:00
parent 65c87531be
commit f5e46fffd7
1 changed files with 10 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
components/aggpas/src/agg_basics.pas
View File

@ -365,11 +365,9 @@ type
// to be. // to be.
procedure NoP; procedure NoP;
// SHR for signed integers is differently implemented in pascal compilers { These implementations have changed to use FPC's Sar*() functions, so should
// than in c++ compilers. On the assembler level, c++ is using the SAR and now support all platforms with ASM code. At a later date these functions
// pascal is using SHR. That gives completely different result, when the could be removed completely. }
// number is negative. We have to be compatible with c++ implementation,
// thus instead of directly using SHR we emulate c++ solution.
function shr_int8 (i ,shift : int8 ) : int8; function shr_int8 (i ,shift : int8 ) : int8;
function shr_int16(i ,shift : int16 ) : int16; function shr_int16(i ,shift : int16 ) : int16;
function shr_int32(i ,shift : int ) : int; function shr_int32(i ,shift : int ) : int;
@ -1591,90 +1589,22 @@ begin
end; end;
{ SHR_INT8 } { SHR_INT8 }
function shr_int8; function shr_int8(i ,shift : int8 ) : int8;
begin begin
{$IFDEF AGG_CPU_386 } Result := SarShortint(i, shift);
asm
mov al ,byte ptr [i ]
mov cl ,byte ptr [shift ]
sar al ,cl
mov byte ptr [result ] ,al
end;
{$ENDIF }
{$IFDEF AGG_CPU_PPC }
asm
lbz r2,i
extsb r2,r2
lbz r3,shift
extsb r3,r3
sraw r2,r2,r3
extsb r2,r2
stb r2,result
end;
{$ENDIF }
end; end;
{ SHR_INT16 } { SHR_INT16 }
function shr_int16; function shr_int16(i ,shift : int16 ) : int16;
begin begin
{$IFDEF AGG_CPU_386 } Result := SarSmallint(i, shift);
asm
mov ax ,word ptr [i ]
mov cx ,word ptr [shift ]
sar ax ,cl
mov word ptr [result ] ,ax
end;
{$ENDIF }
{$IFDEF AGG_CPU_PPC }
asm
lha r2,i
lha r3,shift
sraw r2,r2,r3
extsh r2,r2
sth r2,result
end;
{$ENDIF }
end; end;
{ SHR_INT32 } { SHR_INT32 }
function shr_int32; function shr_int32(i, shift: int): int;
begin begin
{$IFDEF AGG_CPU_386 } Result := SarLongint(i, shift);
asm
mov eax ,dword ptr [i ]
mov ecx ,dword ptr [shift ]
sar eax ,cl
mov dword ptr [result ] ,eax
end;
{$ENDIF }
{$IFDEF AGG_CPU_PPC }
asm
lwz r3,i
lwz r2,shift
sraw r3,r3,r2
stw r3,result
end;
{$ENDIF }
end; end;
END. end.