1 ;

     2 ; mmx format converter main loops for HERMES

     3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk)

     4 ; This source code is licensed under the GNU LGPL

     5 ; 

     6 ; Please refer to the file COPYING.LIB contained in the distribution for

     7 ; licensing conditions		

     8 ;

     9 

    10 BITS 32

    11 

    12 %include "common.inc"

    13 

    14 SDL_FUNC _ConvertMMX

    15 

    16 SECTION .text

    17 		

    18 ;; _ConvertMMX:	 

    19 ;; [ESP+8] ConverterInfo*

    20 ;; --------------------------------------------------------------------------

    21 ;; ConverterInfo (ebp+..)

    22 ;;   0:	void *s_pixels

    23 ;;   4:	int s_width

    24 ;;   8:	int s_height

    25 ;;  12:	int s_add

    26 ;;  16:	void *d_pixels

    27 ;;  20:	int d_width

    28 ;;  24:	int d_height

    29 ;;  28:	int d_add

    30 ;;  32:	void (*converter_function)() 

    31 ;;  36: int32 *lookup

    32 	

    33 _ConvertMMX:

    34 	push ebp

    35 	mov ebp,esp

    36 

    37 ; Save the registers used by the blitters, necessary for optimized code

    38 	pusha

    39 

    40 	mov eax,[ebp+8]

    41 

    42         cmp dword [eax+4],BYTE 0

    43 	je endconvert

    44 	

    45 	mov ebp,eax

    46 	

    47 	mov esi,[ebp+0]

    48 	mov edi,[ebp+16]

    49 	

    50 y_loop:	

    51 	mov ecx,[ebp+4]

    52 

    53 	call [ebp+32]

    54 

    55 	add esi,[ebp+12]

    56 	add edi,[ebp+28]

    57 	

    58 	dec dword  [ebp+8]

    59 	jnz y_loop

    60 

    61 	

    62 ; Restore the registers used by the blitters, necessary for optimized code

    63 	popa

    64 

    65 	pop ebp

    66 

    67 endconvert:

    68 	emms

    69 	

    70 	ret		

    71 

    72 %ifidn __OUTPUT_FORMAT__,elf

    73 section .note.GNU-stack noalloc noexec nowrite progbits

    74 %endif