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comparison src/video/riscos/SDL_riscosASM.s @ 1035:974ba6ae0fa3

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Date: Wed, 26 Jan 2005 13:37:09 GMT From: Peter Naulls Subject: RISC OS SDL Patches Sam, I've attached a diff of the latest changes to libSDL for RISC OS support. These changes are by Alan Buckley and myself. The most significant of these are: Optimised assembler blit rountines - I've attached the file src/video/riscos/SDL_riscosASM.s which is needed for this. Move to using /dev/dsp instead of its own audio implementation. This means that src/audio/riscos/SDL_drenderer.c should be removed Typo fixes. Mainly correct spelling of "RISC OS", but some from elsewhere too.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 12 Feb 2005 18:01:31 +0000
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children 7eeb3324d37d
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1034:2eca15c3f609 1035:974ba6ae0fa3
1 Date: Wed, 26 Jan 2005 13:37:09 GMT
2 From: Peter Naulls <peter@chocky.org>
3 To: slouken@libsdl.org
4 Subject: RISC OS SDL Patches
5
6 ;
7 ; SDL - Simple DirectMedia Layer
8 ; Copyright (C) 1997-2004 Sam Lantinga
9 ;
10 ; This library is free software; you can redistribute it and/or
11 ; modify it under the terms of the GNU Library General Public
12 ; License as published by the Free Software Foundation; either
13 ; version 2 of the License, or (at your option) any later version.
14 ;
15 ; This library is distributed in the hope that it will be useful,
16 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ; Library General Public License for more details.
19 ;
20 ; You should have received a copy of the GNU Library General Public
21 ; License along with this library; if not, write to the Free
22 ; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 ;
24 ; Sam Lantinga
25 ; slouken@devolution.com
26 ;
27 ; Assembler routines for RISC OS display
28 ;
29
30 AREA |C$$CODE|
31
32 EXPORT |RISCOS_Put32|
33
34 ; Display 32bpp to 32bpp, 1:1
35 ;
36 ; Code provided by Adrain Lees
37 ;
38 ; entry a1 -> destination
39 ; a2 = dest width in pixels
40 ; a3 = dest line length in bytes
41 ; a4 = dest height in scanlines
42 ; arg5 -> source
43 ; arg6 = byte offset from end of source line to start of next
44
45 Arg5 * 10*4
46 Arg6 * Arg5+4
47
48 RISCOS_Put32 ROUT
49 STMFD sp!,{a2,v1-v6,sl,fp,lr}
50 LDR ip,[sp,#Arg5]
51 MOV lr,a1
52 B ucp64lp
53
54 00 ;tail strip of 1-15 pixels
55
56 LDR v1,[ip],#4
57 01 SUBS a2,a2,#1
58 STR v1,[lr],#4
59 LDRHI v1,[ip],#4
60 BHI %01
61 B %02
62
63 ucp64end ADDS a2,a2,#16
64 BNE %00
65
66 02 SUBS a4,a4,#1 ;height--
67 LDRHI v1,[sp,#Arg6]
68 LDRHI a2,[sp] ;reload width
69 BLS %03
70
71 ;move to start of next scanline
72
73 ADD lr,a1,a3
74 ADD a1,a1,a3
75 ADD ip,ip,v1
76
77 ucp64lp SUBS a2,a2,#16
78 BLO ucp64end
79
80 PLD [ip,#64]
81
82 LDR v1,[ip],#4
83 LDR v2,[ip],#4
84 LDR v3,[ip],#4
85 LDR v4,[ip],#4
86 LDR v5,[ip],#4
87 LDR v6,[ip],#4
88 LDR sl,[ip],#4
89 LDR fp,[ip],#4
90 STR v1,[lr],#4
91 STR v2,[lr],#4
92 STR v3,[lr],#4
93 STR v4,[lr],#4
94 STR v5,[lr],#4
95 STR v6,[lr],#4
96 STR sl,[lr],#4
97 STR fp,[lr],#4
98
99 PLD [ip,#64]
100
101 LDR v1,[ip],#4
102 LDR v2,[ip],#4
103 LDR v3,[ip],#4
104 LDR v4,[ip],#4
105 LDR v5,[ip],#4
106 LDR v6,[ip],#4
107 LDR sl,[ip],#4
108 LDR fp,[ip],#4
109 STR v1,[lr],#4
110 STR v2,[lr],#4
111 STR v3,[lr],#4
112 STR v4,[lr],#4
113 STR v5,[lr],#4
114 STR v6,[lr],#4
115 STR sl,[lr],#4
116 STR fp,[lr],#4
117
118 B ucp64lp
119
120 03 LDMFD sp!,{a2,v1-v6,sl,fp,pc}
121