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{
x86 format converters for HERMES
Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version
with the following modification:
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules,and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms
and conditions of the license of that module. An independent module is a
module which is not derived from or based on this library. If you modify
this library, you may extend this exception to your version of the library,
but you are not obligated to do so. If you do not wish to do so, delete this
exception statement from your version.
This library 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. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
}
label
_x86return, _x86return_S;
var
cpu_flags: DWord = 0;
{ _ConvertX86:
[ESP+8] ConverterInfo*
--------------------------------------------------------------------------
ConvertX86Stretch 'abuses' the following info structure fields:
- d_pitch for the y increment
- s_add for the x increment
because they're unused anyway and this is thread safe.. (it's a per
converter handle structure)
}
procedure ConvertX86Stretch(hci: PHermesConverterInterface); cdecl; assembler;
label
endconvert_S;
asm
pushl %ebp
movl 8(%ebp),%ebp
movl 8(%ebp),%eax // s_height
sall $16,%eax
cltd
idivl 24(%ebp) // d_height
movl %eax,44(%ebp) // d_pitch
movl 4(%ebp),%eax // s_width
sall $16,%eax
cltd
idivl 20(%ebp) // d_width
movl %eax,12(%ebp) // s_add
movl $0,8(%ebp) // s_height
movl 16(%ebp),%edi // d_pixels
movl 0(%ebp),%esi // s_pixels
movl 12(%ebp),%edx // s_add
movl 20(%ebp),%ecx // d_width
jmp *32(%ebp) // conv_func
.balign 8
_x86return_S:
decl 24(%ebp) // d_height
jz endconvert_S
movl 8(%ebp),%eax // s_height
addl 28(%ebp),%edi // d_add
addl 44(%ebp),%eax // d_pitch
movl %eax,%ebx
shrl $16,%eax
mull 40(%ebp) // s_pitch
andl $0x0ffff,%ebx
movl %ebx,8(%ebp) // s_height
addl %eax,%esi
movl 12(%ebp),%edx // s_add
movl 20(%ebp),%ecx // d_width
jmp *32(%ebp) // conv_func
endconvert_S:
popl %ebp
end;
procedure ConvertX86(hci: PHermesConverterInterface); cdecl; assembler;
label
endconvert;
asm
pushl %ebp
movl 8(%ebp),%ebp
movl 0(%ebp),%esi // s_pixels
movl 20(%ebp),%ecx // d_width
movl 16(%ebp),%edi // d_pixels
jmp *32(%ebp)
.balign 8
_x86return:
decl 8(%ebp) // s_height
jz endconvert
movl 20(%ebp),%ecx // d_width
addl 12(%ebp),%esi // s_add
addl 28(%ebp),%edi // d_add
jmp *32(%ebp)
endconvert:
popl %ebp
end;
// Hermes_X86_CPU returns the CPUID flags in eax
function Hermes_X86_CPU: Integer; cdecl; assembler;
asm
pushfl
popl %eax
movl %eax,%ecx
xorl $0x040000,%eax
pushl %eax
popfl
pushfl
popl %eax
xorl %ecx,%eax
jz .L1 // Processor is 386
pushl %ecx
popfl
movl %ecx,%eax
xorl $0x200000,%eax
pushl %eax
popfl
pushfl
popl %eax
xorl %ecx,%eax
je .L1
pusha
movl $1,%eax
cpuid
movl %edx,cpu_flags
popa
movl cpu_flags,%eax
.L1:
end;
|
