fpc/rtl/arm/arm.inc

157 lines
3.5 KiB
PHP

{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 2003 by the Free Pascal development team.
Processor dependent implementation for the system unit for
ARM
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.
**********************************************************************}
{$asmmode gas}
procedure fpc_cpuinit;
begin
asm
rfs r0
and r0,r0,#0xffe0ffff
orr r0,r0,#0x00020000
wfs r0
end;
end;
{****************************************************************************
stack frame related stuff
****************************************************************************}
{$define FPC_SYSTEM_HAS_GET_FRAME}
function get_frame:pointer;assembler;nostackframe;{$ifdef SYSTEMINLINE}inline;{$endif}
asm
mov r0,r11
end ['R0'];
{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer):pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
asm
movs r0,r0
beq .Lg_a_null
ldr r0,[r0,#-4]
.Lg_a_null:
end ['R0'];
{$define FPC_SYSTEM_HAS_GET_CALLER_FRAME}
function get_caller_frame(framebp:pointer):pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
asm
movs r0,r0
beq .Lgnf_null
ldr r0,[r0,#-12]
.Lgnf_null:
end ['R0'];
{$define FPC_SYSTEM_HAS_SPTR}
Function Sptr : pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
asm
mov r0,sp
end ['R0'];
{$define FPC_SYSTEM_HAS_FILLCHAR}
Procedure FillChar(var x;count:longint;value:byte);assembler;nostackframe;
asm
// less than 0?
cmp r1,#0
movlt pc,lr
mov r3,r0
cmp r1,#8 // at least 8 bytes to do?
blt .LFillchar2
orr r2,r2,r2,lsl #8
orr r2,r2,r2,lsl #16
.LFillchar0:
tst r3,#3 // aligned yet?
strneb r2,[r3],#1
subne r1,r1,#1
bne .LFillchar0
mov ip,r2
.LFillchar1:
cmp r1,#8 // 8 bytes still to do?
blt .LFillchar2
stmia r3!,{r2,ip}
sub r1,r1,#8
cmp r1,#8 // 8 bytes still to do?
blt .LFillchar2
stmia r3!,{r2,ip}
sub r1,r1,#8
cmp r1,#8 // 8 bytes still to do?
blt .LFillchar2
stmia r3!,{r2,ip}
sub r1,r1,#8
cmp r1,#8 // 8 bytes still to do?
stmgeia r3!,{r2,ip}
subge r1,r1,#8
bge .LFillchar1
.LFillchar2:
movs r1,r1 // anything left?
moveq pc,lr
rsb r1,r1,#7
add pc,pc,r1,lsl #2
mov r0,r0
strb r2,[r3],#1
strb r2,[r3],#1
strb r2,[r3],#1
strb r2,[r3],#1
strb r2,[r3],#1
strb r2,[r3],#1
strb r2,[r3],#1
mov pc,lr
end;
{
$Log$
Revision 1.10 2005-01-05 15:59:02 florian
+ added nostackframe directive to get_frame
Revision 1.9 2005/01/05 15:21:14 florian
* fillchar fixed; it's used now
Revision 1.8 2005/01/04 16:46:38 florian
+ correct setting of FPU exception mask
Revision 1.7 2004/03/23 21:03:10 florian
+ assembler implementation of fpc_mul_qword
* fpu exceptions are now generated
Revision 1.6 2004/03/14 21:45:11 florian
* draft for qword mul
Revision 1.5 2004/01/21 23:12:07 florian
+ get_caller_addr/frame implemented
Revision 1.4 2004/01/20 21:01:57 florian
* fixed setjump
* fixed syscalls
Revision 1.3 2003/11/21 00:40:06 florian
* some arm issues fixed
Revision 1.2 2003/09/03 14:09:37 florian
* arm fixes to the common rtl code
* some generic math code fixed
* ...
Revision 1.1 2003/08/21 16:41:54 florian
* empty dummy files
+ [long|set]jmp implemented
}