1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/* ScummVMDS - Scumm Interpreter DS Port
* Copyright (C) 2002-2004 The ScummVM project and Neil Millstone
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include "stdafx.h"
#define CHARSET_MASK_TRANSPARENCY 253
namespace DS {
void asmDrawStripToScreen(int height, int width, byte const* text, byte const* src, byte* dst,
int vsPitch, int vmScreenWidth, int textSurfacePitch) {
if (height <= 0) height = 1;
if (width < 4) return;
width &= ~4;
// src = (const byte *) (((int) (src)) & (~4));
// dst = (byte *) (((int) (dst)) & (~4));
// text = (const byte *) (((int) (text)) & (~4));
asm ( "mov r5, %0\n" // Height
"yLoop:\n"
"mov r3, #0\n" // X pos
"xLoop:\n"
"ldr r4, [%2, r3]\n" // Load text layer word
"cmp r4, %5\n"
"bne singleByteCompare\n"
"ldr r4, [%3, r3]\n"
"str r4, [%4, r3]\n"
"add r3, r3, #4\n"
"cmp r3, %1\n" // x == width?
"blt xLoop\n"
"add %2, %2, %8\n" // src += vs->pitch
"add %3, %3, %6\n" // dst += _vm->_screenWidth
"add %4, %4, %7\n" // text += _textSurface.pitch
"sub r5, r5, #1\n" // y -= 1
"cmp r5, #0\n" // y == 0?
"bne yLoop\n"
"b end\n"
"singleByteCompare:\n"
"ldrb r4, [%2, r3]\n" // Load text byte
"cmps r4, %5, lsr #24\n" // Compare with mask
"strneb r4, [%4, r3]\n" // Store if not equal
"ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
"streqb r4, [%4, r3]\n" // Store it
"add r3, r3, #1\n"
"ldrb r4, [%2, r3]\n" // Load text byte
"cmps r4, %5, lsr #24\n" // Compare with mask
"strneb r4, [%4, r3]\n" // Store if not equal
"ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
"streqb r4, [%4, r3]\n" // Store it
"add r3, r3, #1\n"
"ldrb r4, [%2, r3]\n" // Load text byte
"cmps r4, %5, lsr #24\n" // Compare with mask
"strneb r4, [%4, r3]\n" // Store if not equal
"ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
"streqb r4, [%4, r3]\n" // Store it
"add r3, r3, #1\n"
"ldrb r4, [%2, r3]\n" // Load text byte
"cmps r4, %5, lsr #24\n" // Compare with mask
"strneb r4, [%4, r3]\n" // Store if not equal
"ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
"streqb r4, [%4, r3]\n" // Store it
"add r3, r3, #1\n"
"cmps r3, %1\n" // x == width?
"blt xLoop\n" // Repeat
"add %2, %2, %8\n" // src += vs->pitch
"add %3, %3, %6\n" // dst += _vm->_screenWidth
"add %4, %4, %7\n" // text += _textSurface.pitch
"sub r5, r5, #1\n" // y -= 1
"cmp r5, #0\n" // y == 0?
"bne yLoop\n"
"end:\n"
: /* no output registers */
: "r" (height), "r" (width), "r" (text), "r" (src), "r" (dst), "r" (CHARSET_MASK_TRANSPARENCY | (CHARSET_MASK_TRANSPARENCY << 8) | (CHARSET_MASK_TRANSPARENCY << 16) | (CHARSET_MASK_TRANSPARENCY << 24)),
"r" (vsPitch), "r" (vmScreenWidth), "r" (textSurfacePitch)
: "r5", "r3", "r4", "%2", "%3", "%4", "memory");
}
void asmCopy8Col(byte* dst, int dstPitch, const byte* src, int height) {
asm("ands r0, %3, #1\n"
"addne %3, %3, #1\n"
"bne roll2\n"
"yLoop2:\n"
"ldr r0, [%2, #0]\n"
"str r0, [%0, #0]\n"
"ldr r0, [%2, #4]\n"
"str r0, [%0, #4]\n"
"add %0, %0, %1\n"
"add %2, %2, %1\n"
"roll2:\n"
"ldr r0, [%2, #0]\n"
"str r0, [%0, #0]\n"
"ldr r0, [%2, #4]\n"
"str r0, [%0, #4]\n"
"add %0, %0, %1\n"
"add %2, %2, %1\n"
"subs %3, %3, #2\n"
"bne yLoop2\n"
: /* no output registers */
: "r" (dst), "r" (dstPitch), "r" (src), "r" (height)
: "r0", "%0", "%2", "%3");
}
}
|
