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comparison src/timer/mint/SDL_vbltimer.S @ 4381:5425a6fbacf8 SDL-1.2

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Adapt timer code for Coldfire
author Patrice Mandin <patmandin@gmail.com>
date Sat, 07 Nov 2009 20:56:09 +0000
parents a1b03ba2fcd0
children
comparison
equal deleted inserted replaced
4380:66aea42c3541 4381:5425a6fbacf8
34 .globl _SDL_AtariVblInstall 34 .globl _SDL_AtariVblInstall
35 .globl _SDL_AtariVblUninstall 35 .globl _SDL_AtariVblUninstall
36 36
37 .globl _SDL_MintAudio_hasfpu 37 .globl _SDL_MintAudio_hasfpu
38 38
39 /*--- Save/restore FPU context ---*/
40
41 #if defined(__mcoldfire__)
42
43 #define SAVE_FPU_CONTEXT \
44 lea sp@(-216),sp; \
45 fsave sp@; \
46 fmovel fpiar,sp@-; \
47 lea sp@(-64),sp; \
48 fmovemd fp0-fp7,sp@
49
50 #define RESTORE_FPU_CONTEXT \
51 fmovemd sp@,fp0-fp7; \
52 lea sp@(64),sp; \
53 fmovel sp@+,fpiar; \
54 frestore sp@; \
55 lea sp@(216),sp
56
57 #else
58
59 #define SAVE_FPU_CONTEXT \
60 .chip 68k/68881; \
61 fsave sp@-; \
62 fmoveml fpcr/fpsr/fpiar,sp@-; \
63 fmovemx fp0-fp7,sp@-; \
64 .chip 68k
65
66 #define RESTORE_FPU_CONTEXT \
67 .chip 68k/68881; \
68 fmovemx sp@+,fp0-fp7; \
69 fmoveml sp@+,fpcr/fpsr/fpiar; \
70 frestore sp@+; \
71 .chip 68k
72
73 #endif
74
39 /*--- Vector installer ---*/ 75 /*--- Vector installer ---*/
40 76
41 _SDL_AtariVblInstall: 77 _SDL_AtariVblInstall:
78 #if defined(__mcoldfire__)
79 movel sp@(4),d0
80 movel d0,my_vector
81 #else
42 movel sp@(4),my_vector 82 movel sp@(4),my_vector
83 #endif
84
43 lea _my_vbl,a0 85 lea _my_vbl,a0
44 86
45 clrw vbl_mutex 87 clrw vbl_mutex
88 #if defined(__mcoldfire__)
89 movel _hz_200.w,d0
90 movel d0, _SDL_Atari_hz200
91 #else
46 movel _hz_200.w, _SDL_Atari_hz200 92 movel _hz_200.w, _SDL_Atari_hz200
93 #endif
47 94
48 /* Stop interrupts */ 95 /* Stop interrupts */
49 96
50 movew #0x2700,sr 97 movew #0x2700,sr
51 98
56 moveq #7,d0 103 moveq #7,d0
57 bcl_search_place: 104 bcl_search_place:
58 movel (a1),d1 105 movel (a1),d1
59 beqs place_found 106 beqs place_found
60 addql #4,a1 107 addql #4,a1
108 #if defined(__mcoldfire__)
109 subql #1,d0
110 bpls bcl_search_place
111 #else
61 dbra d0,bcl_search_place 112 dbra d0,bcl_search_place
113 #endif
62 114
63 /* Not found */ 115 /* Not found */
64 moveq #1,d0 116 moveq #1,d0
65 bras exit_vbl_queue 117 bras exit_vbl_queue
66 118
98 bnes next_place 150 bnes next_place
99 clrl (a1) 151 clrl (a1)
100 moveq #0,d1 152 moveq #0,d1
101 next_place: 153 next_place:
102 addql #4,a1 154 addql #4,a1
155 #if defined(__mcoldfire__)
156 subql #1,d1
157 bpls bcl_search_place
158 #else
103 dbra d1,bcl2_search_place 159 dbra d1,bcl2_search_place
160 #endif
104 161
105 /* Restart interrupts */ 162 /* Restart interrupts */
106 movew #0x2300,sr 163 movew #0x2300,sr
107 badvector: 164 badvector:
108 rts 165 rts
109 166
110 /*--- Our vbl ---*/ 167 /*--- Our vbl ---*/
111 168
112 _my_vbl: 169 _my_vbl:
170 #if defined(__mcoldfire__)
171 lea sp@(-60),sp
172 moveml d0-d7/a0-a6,sp@
173 #else
174 moveml d0-d7/a0-a6,sp@-
175 #endif
176
113 /* Update _hz_200 */ 177 /* Update _hz_200 */
178 #if defined(__mcoldfire__)
179 movel _hz_200.w,d0
180 movel d0, _SDL_Atari_hz200
181 #else
114 movel _hz_200.w, _SDL_Atari_hz200 182 movel _hz_200.w, _SDL_Atari_hz200
183 #endif
115 184
116 /* Verify if this is not already running */ 185 /* Verify if this is not already running */
117 186
118 tstw vbl_mutex 187 tstw vbl_mutex
119 bnes vbl_end 188 bnes vbl_end
189 #if defined(__mcoldfire__)
190 movew vbl_mutex,d0
191 notl d0
192 movew d0,vbl_mutex
193 #else
120 notw vbl_mutex 194 notw vbl_mutex
121 195 #endif
122 moveml d0-d7/a0-a6,sp@-
123 196
124 /* Save FPU if needed */ 197 /* Save FPU if needed */
125 tstw _SDL_MintAudio_hasfpu 198 tstw _SDL_MintAudio_hasfpu
126 beqs SDL_AtariVbl_nofpu1 199 beqs SDL_AtariVbl_nofpu1
127 .chip 68060 200 SAVE_FPU_CONTEXT
128 fsave sp@-
129 fmoveml fpcr/fpsr/fpiar,sp@-
130 fmovemx fp0-fp7,sp@-
131 .chip 68000
132 SDL_AtariVbl_nofpu1: 201 SDL_AtariVbl_nofpu1:
133 202
134 movel my_vector,a0 203 movel my_vector,a0
135 jsr a0@ 204 jsr a0@
136 205
137 /* Restore FPU if needed */ 206 /* Restore FPU if needed */
138 tstw _SDL_MintAudio_hasfpu 207 tstw _SDL_MintAudio_hasfpu
139 beqs SDL_AtariVbl_Xbios_nofpu2 208 beqs SDL_AtariVbl_Xbios_nofpu2
140 .chip 68060 209 RESTORE_FPU_CONTEXT
141 fmovemx sp@+,fp0-fp7
142 fmoveml sp@+,fpcr/fpsr/fpiar
143 frestore sp@+
144 .chip 68000
145 SDL_AtariVbl_Xbios_nofpu2: 210 SDL_AtariVbl_Xbios_nofpu2:
146
147 moveml sp@+,d0-d7/a0-a6
148 211
149 clrw vbl_mutex 212 clrw vbl_mutex
150 vbl_end: 213 vbl_end:
214 #if defined(__mcoldfire__)
215 moveml sp@,d0-d7/a0-a6
216 lea sp@(60),sp
217 #else
218 moveml sp@+,d0-d7/a0-a6
219 #endif
151 rts 220 rts
152 221
153 .data 222 .data
154 .even 223 .even
155 .comm _SDL_Atari_hz200,4*1 224 .comm _SDL_Atari_hz200,4*1