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105 lines
2.9 KiB
PHP
105 lines
2.9 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) 1999-2000 by the Free Pascal development team
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Processor dependent part of strings.pp, not shared with
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sysutils unit.
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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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function strpas(p : pchar) : string;
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begin
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asm
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movl p,%esi
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movl __RESULT,%edi
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movl %esi,%edx
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movl $1,%ecx
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andl $0x0fffffff8,%esi
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// skip length byte
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incl %edi
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subl %esi,%edx
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jz .LStrPasAligned
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movl p,%esi
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// align source to multiple of 4 (not dest, because we can't read past
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// the end of the source, since that may be past the end of the heap
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// -> sigsegv!!)
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.LStrPasAlignLoop:
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movb (%esi),%al
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incl %esi
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testb %al,%al
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jz .LStrPasDone
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incl %edi
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incb %cl
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decb %dl
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movb %al,-1(%edi)
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jne .LStrPasAlignLoop
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.balign 16
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.LStrPasAligned:
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movl (%esi),%eax
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addl $4,%esi
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// this won't overwrite data since the result = 255 char string
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// and we never process more than the first 255 chars of p
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movl %eax,(%edi)
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testl $0x0ff,%eax
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jz .LStrPasDone
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incl %ecx
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testl $0x0ff00,%eax
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jz .LStrPasDone
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incl %ecx
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testl $0x0ff0000,%eax
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jz .LStrPasDone
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incl %ecx
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testl $0x0ff000000,%eax
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jz .LStrPasDone
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incl %ecx
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addl $4,%edi
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cmpl $252,%ecx
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jbe .LStrPasAligned
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testb %cl,%cl
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jz .LStrPasDone
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movl (%esi),%eax
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.LStrPasEndLoop:
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testb %al,%al
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jz .LStrPasDone
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movb %al,(%edi)
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shrl $8,%eax
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incl %edi
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incb %cl
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jnz .LStrPasEndLoop
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.LStrPasDone:
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movl __RESULT,%edi
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addb $255,%cl
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movb %cl,(%edi)
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end ['EAX','ECX','EDX','ESI','EDI'];
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end;
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function strpcopy(d : pchar;const s : string) : pchar;assembler;
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asm
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pushl %esi // Save ESI
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cld
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movl s,%esi // Load Source adress
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movl d,%edi // load destination address
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movzbl (%esi),%ecx // load length in ECX
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incl %esi
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rep
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movsb
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movb $0,(%edi)
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movl d,%eax // return value to EAX
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popl %esi
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end ['EDI','EAX','ECX'];
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{
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$Log$
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Revision 1.2 2000-07-13 11:33:42 michael
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+ removed logs
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}
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