mmx_main.asm
1
2
3
4
5
6
7
8
9
10
11
;
; 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
12
%include "common.inc"
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
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]
jmp [ebp+32]
_mmxreturn:
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
74
75
76
%ifidn __OUTPUT_FORMAT__,elf
section .note.GNU-stack noalloc noexec nowrite progbits
%endif