/
mmx_main.asm
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/
mmx_main.asm
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;
; mmx format converter main loops for HERMES
; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk)
; This source code is licensed under the GNU LGPL
;
; Please refer to the file COPYING.LIB contained in the distribution for
; licensing conditions
;
BITS 32
%include "common.inc"
SDL_FUNC _ConvertMMX
SECTION .text
;; _ConvertMMX:
;; [ESP+8] ConverterInfo*
;; --------------------------------------------------------------------------
;; ConverterInfo (ebp+..)
;; 0: void *s_pixels
;; 4: int s_width
;; 8: int s_height
;; 12: int s_add
;; 16: void *d_pixels
;; 20: int d_width
;; 24: int d_height
;; 28: int d_add
;; 32: void (*converter_function)()
;; 36: int32 *lookup
_ConvertMMX:
push ebp
mov ebp,esp
; Save the registers used by the blitters, necessary for optimized code
pusha
mov eax,[ebp+8]
cmp dword [eax+4],BYTE 0
je endconvert
mov ebp,eax
mov esi,[ebp+0]
mov edi,[ebp+16]
y_loop:
mov ecx,[ebp+4]
call [ebp+32]
add esi,[ebp+12]
add edi,[ebp+28]
dec dword [ebp+8]
jnz y_loop
; Restore the registers used by the blitters, necessary for optimized code
popa
pop ebp
endconvert:
emms
ret
%ifidn __OUTPUT_FORMAT__,elf32
section .note.GNU-stack noalloc noexec nowrite progbits
%endif