e14743d1 |
1 | ; |
2 | ; x86 format converters for HERMES |
3 | ; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at) |
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 | ; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission |
10 | ; |
11 | |
12 | BITS 32 |
13 | |
14 | %include "common.inc" |
15 | |
16 | SDL_FUNC _ConvertX86 |
17 | |
18 | SECTION .text |
19 | |
20 | ;; _ConvertX86: |
21 | ;; [ESP+8] ConverterInfo* |
22 | ;; -------------------------------------------------------------------------- |
23 | ;; ConverterInfo (ebp+..) |
24 | ;; 0: void *s_pixels |
25 | ;; 4: int s_width |
26 | ;; 8: int s_height |
27 | ;; 12: int s_add |
28 | ;; 16: void *d_pixels |
29 | ;; 20: int d_width |
30 | ;; 24: int d_height |
31 | ;; 28: int d_add |
32 | ;; 32: void (*converter_function)() |
33 | ;; 36: int32 *lookup |
34 | |
35 | _ConvertX86: |
36 | push ebp |
37 | mov ebp,esp |
38 | |
39 | ; Save the registers used by the blitters, necessary for optimized code |
40 | pusha |
41 | |
42 | mov eax,[ebp+8] |
43 | |
44 | cmp dword [eax+4],BYTE 0 |
45 | je endconvert |
46 | |
47 | mov ebp,eax |
48 | |
49 | mov esi,[ebp+0] |
50 | mov edi,[ebp+16] |
51 | |
52 | y_loop: |
53 | mov ecx,[ebp+4] |
54 | |
55 | call [ebp+32] |
56 | |
57 | add esi,[ebp+12] |
58 | add edi,[ebp+28] |
59 | |
60 | dec dword [ebp+8] |
61 | jnz y_loop |
62 | |
63 | ; Restore the registers used by the blitters, necessary for optimized code |
64 | popa |
65 | |
66 | pop ebp |
67 | |
68 | endconvert: |
69 | ret |
70 | |
71 | |
72 | |
73 | %ifidn __OUTPUT_FORMAT__,elf |
74 | section .note.GNU-stack noalloc noexec nowrite progbits |
75 | %endif |