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151 lines
3.3 KiB
PHP
151 lines
3.3 KiB
PHP
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 2003 by the Free Pascal development team.
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Processor dependent implementation for the system unit for
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ARM
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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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.
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**********************************************************************}
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{$asmmode gas}
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procedure fpc_cpuinit;
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begin
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asm
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rfs r0
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orr r0,r0,#0x1f0000
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wfs r0
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end;
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end;
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{****************************************************************************
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stack frame related stuff
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****************************************************************************}
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{$define FPC_SYSTEM_HAS_GET_FRAME}
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function get_frame:pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
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asm
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mov r0,r11
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end ['R0'];
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{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
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function get_caller_addr(framebp:pointer):pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
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asm
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movs r0,r0
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beq .Lg_a_null
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ldr r0,[r0,#-4]
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.Lg_a_null:
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end ['R0'];
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{$define FPC_SYSTEM_HAS_GET_CALLER_FRAME}
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function get_caller_frame(framebp:pointer):pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
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asm
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movs r0,r0
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beq .Lgnf_null
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ldr r0,[r0,#-12]
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.Lgnf_null:
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end ['R0'];
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{$define FPC_SYSTEM_HAS_SPTR}
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Function Sptr : pointer;assembler;{$ifdef SYSTEMINLINE}inline;{$endif}
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asm
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mov r0,sp
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end ['R0'];
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{
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{$define FPC_SYSTEM_HAS_FILLCHAR}
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Procedure FillChar(var x;count:longint;value:byte);assembler;
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* void *memset (dstpp, c, len) */
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asm
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mov a4, a1
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cmp a2, $8 // at least 8 bytes to do?
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blt .Fillchar2
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orr a3, a3, a3, lsl $8
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orr a3, a3, a3, lsl $16
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.Fillchar0:
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tst a4, $3 // aligned yet?
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strneb a3, [a4], $1
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subne a2, a2, $1
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bne .Fillchar0
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mov ip, a3
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.Fillchar1:
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cmp a2, $8 // 8 bytes still to do?
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blt .Fillchar2
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stmia a4!, {a3, ip}
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sub a2, a2, $8
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cmp a2, $8 // 8 bytes still to do?
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blt .Fillchar2
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stmia a4!, {a3, ip}
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sub a2, a2, $8
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cmp a2, $8 // 8 bytes still to do?
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blt .Fillchar2
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stmia a4!, {a3, ip}
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sub a2, a2, $8
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cmp a2, $8 // 8 bytes still to do?
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stmgeia a4!, {a3, ip}
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subge a2, a2, $8
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bge .Fillchar1
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.Fillchar2:
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movs a2, a2 // anything left?
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RETINSTR(moveq,pc,lr) // nope
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rsb a2, a2, $7
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add pc, pc, a2, lsl $2
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mov r0, r0
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strb a3, [a4], $1
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strb a3, [a4], $1
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strb a3, [a4], $1
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strb a3, [a4], $1
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strb a3, [a4], $1
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strb a3, [a4], $1
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strb a3, [a4], $1
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RETINSTR(mov,pc,lr)
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end;
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}
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{
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$Log$
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Revision 1.7 2004-03-23 21:03:10 florian
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+ assembler implementation of fpc_mul_qword
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* fpu exceptions are now generated
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Revision 1.6 2004/03/14 21:45:11 florian
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* draft for qword mul
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Revision 1.5 2004/01/21 23:12:07 florian
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+ get_caller_addr/frame implemented
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Revision 1.4 2004/01/20 21:01:57 florian
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* fixed setjump
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* fixed syscalls
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Revision 1.3 2003/11/21 00:40:06 florian
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* some arm issues fixed
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Revision 1.2 2003/09/03 14:09:37 florian
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* arm fixes to the common rtl code
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* some generic math code fixed
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* ...
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Revision 1.1 2003/08/21 16:41:54 florian
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* empty dummy files
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+ [long|set]jmp implemented
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}
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