mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-05-01 13:53:57 +02:00
48 lines
1.3 KiB
PHP
48 lines
1.3 KiB
PHP
{
|
|
$Id$
|
|
This file is part of the Free Pascal run time library.
|
|
Copyright (c) 1999-2000 by the Free Pascal development team
|
|
|
|
Processor specific implementation of strlen
|
|
|
|
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.
|
|
|
|
**********************************************************************}
|
|
|
|
{ in: p in r3 }
|
|
{ out: result (length) in r3 }
|
|
asm
|
|
{ load the begin of the string in the data cache }
|
|
dcbt 0,r3
|
|
{ empty/invalid string? }
|
|
cmpli cr0,r3,0
|
|
{ if yes, do nothing }
|
|
beq LStrLenDone
|
|
subi r29,r3,1
|
|
LStrLenLoop:
|
|
lbzu r30,1(r29)
|
|
cmpli cr0,r30,0
|
|
bne LStrLenLoop
|
|
sub r3,r29,r3
|
|
LStrLenDone:
|
|
end ['R3','R4','R29','R30','CR0'];
|
|
|
|
{
|
|
$Log$
|
|
Revision 1.4 2002-09-07 16:01:26 peter
|
|
* old logs removed and tabs fixed
|
|
|
|
Revision 1.3 2002/08/18 21:37:48 florian
|
|
* several errors in inline assembler fixed
|
|
|
|
Revision 1.2 2002/08/10 17:14:36 jonas
|
|
* various fixes, mostly changing the names of the modifies registers to
|
|
upper case since that seems to be required by the compiler
|
|
|
|
}
|