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{
This file is part of the Free Pascal run time library.
Copyright (c) 2000 by Jonas Maebe, member of the
Free Pascal development team
Processor dependent part of strings.pp, that can be shared with
sysutils unit.
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.
**********************************************************************}
{$ifndef CPUTHUMB}
{$ifndef FPC_UNIT_HAS_STRUPPER}
{$define FPC_UNIT_HAS_STRUPPER}
function strupper(p : pchar) : pchar;assembler;nostackframe;
asm
mov ip, r0 // Don't change r0, because thats our return value
ldrb r1, [ip] // First loop does not postindex
.LByteLoop:
cmp r1, #0
{$if defined(cputhumb2)}
it eq
{$endif}
{$if not defined(CPUARM_HAS_BX)}
moveq pc, lr
{$else}
bxeq lr
{$endif}
sub r2, r1, #97 // Normalize to zero
cmp r2, #25 // temp >= 0 and temp <=25
{$if defined(cputhumb2)}
itt ls
{$endif}
subls r1, r1, #32 // is lowercase, make uppercase
strlsb r1, [ip] // Store only on change
ldrb r1, [ip, #1]! // Loading here utilizes a load delay slot
b .LByteLoop
end;
{$endif FPC_UNIT_HAS_STRUPPER}
{$ifndef FPC_UNIT_HAS_STRLOWER}
{$define FPC_UNIT_HAS_STRLOWER}
function strlower(p : pchar) : pchar;assembler;nostackframe;
asm
mov ip, r0 // Don't change r0, because thats our return value
ldrb r1, [ip] // First loop does not postindex
.LByteLoop:
cmp r1, #0
{$if defined(cputhumb2)}
it eq
{$endif}
{$if not defined(CPUARM_HAS_BX)}
moveq pc, lr
{$else}
bxeq lr
{$endif}
sub r2, r1, #65 // Normalize to zero
cmp r2, #25 // temp >= 0 and temp <=25
{$if defined(cputhumb2)}
itt ls
{$endif}
addls r1, r1, #32 // Is uppercase, make lowercase
strlsb r1, [ip] // Store only on change
ldrb r1, [ip, #1]! // Loading here utilizes a load delay slot
b .LByteLoop
end;
{$endif FPC_UNIT_HAS_STRLOWER}
{$endif CPUTHUMB}
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