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/*
* Mesa 3-D graphics library
* Version: 4.0
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* DOS/DJGPP device driver v1.3 for Mesa
*
* Copyright (C) 2002 - Borca Daniel
* Email : dborca@yahoo.com
* Web : http://www.geocities.com/dborca
*/
.file "blit.S"
/*
* extern unsigned int vesa_gran_mask, vesa_gran_shift;
* extern int vl_video_selector;
* extern void *vl_current_draw_buffer;
* extern int vl_current_stride, vl_current_height;
* extern int vl_current_offset, vl_current_delta;
*/
.text
/* Desc: VESA bank switching routine (BIOS)
*
* In : EBX=0, EDX = bank number
* Out : -
*
* Note: thrashes EAX
*/
.p2align 5,,31
_vesa_swbankBIOS:
movw $0x4f05, %ax
int $0x10
ret
.p2align 2,,3
.global _vesa_swbank
_vesa_swbank: .long _vesa_swbankBIOS
/* Desc: void vesa_b_dump_virtual (void);
*
* In : -
* Out : -
*
* Note: uses current draw buffer
*/
.p2align 5,,31
.global _vesa_b_dump_virtual
_vesa_b_dump_virtual:
cld
pushl %es
pushl %ebx
pushl %esi
pushl %edi
pushl %ebp
movl _vl_video_selector, %es
movl _vl_current_draw_buffer, %esi
movl _vl_current_offset, %edi
movl _vesa_gran_shift, %ecx
movl _vesa_gran_mask, %ebp
movl %edi, %edx
xorl %ebx, %ebx
andl %ebp, %edi
shrl %cl, %edx
incl %ebp
call *_vesa_swbank
movl _vl_current_stride, %ecx
movl _vl_current_height, %eax
movl _vl_current_delta, %ebx
shrl $2, %ecx
.balign 4
0:
pushl %ecx
.balign 4
1:
cmpl %ebp, %edi
jb 2f
pushl %eax
pushl %ebx
incl %edx
xorl %ebx, %ebx
call *_vesa_swbank
popl %ebx
popl %eax
subl %ebp, %edi
.balign 4
2:
movsl
decl %ecx
jnz 1b
popl %ecx
addl %ebx, %edi
decl %eax
jnz 0b
popl %ebp
popl %edi
popl %esi
popl %ebx
popl %es
ret
/* Desc: void vesa_l_dump_virtual (void);
*
* In : -
* Out : -
*
* Note: uses current draw buffer
*/
.p2align 5,,31
.global _vesa_l_dump_virtual
_vesa_l_dump_virtual:
cld
pushl %es
pushl %esi
pushl %edi
movl _vl_video_selector, %es
movl _vl_current_draw_buffer, %esi
movl _vl_current_offset, %edi
movl _vl_current_stride, %ecx
movl _vl_current_height, %edx
movl _vl_current_delta, %eax
shrl $2, %ecx
.balign 4
0:
pushl %ecx
rep; movsl
popl %ecx
addl %eax, %edi
decl %edx
jnz 0b
popl %edi
popl %esi
popl %es
ret
/* Desc: void vesa_l_dump_virtual_mmx (void);
*
* In : -
* Out : -
*
* Note: uses current draw buffer
*/
.p2align 5,,31
.global _vesa_l_dump_virtual_mmx
_vesa_l_dump_virtual_mmx:
#ifdef USE_MMX_ASM
pushl %esi
pushl %edi
movl _vl_video_selector, %fs
movl _vl_current_draw_buffer, %esi
movl _vl_current_offset, %edi
movl _vl_current_stride, %ecx
movl _vl_current_height, %edx
movl _vl_current_delta, %eax
shrl $3, %ecx
.balign 4
0:
pushl %ecx
.balign 4
1:
movq (%esi), %mm0
addl $8, %esi
movq %mm0, %fs:(%edi)
addl $8, %edi
decl %ecx
jnz 1b
popl %ecx
addl %eax, %edi
decl %edx
jnz 0b
popl %edi
popl %esi
emms
#endif
ret
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