diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/timer/mint/SDL_vbltimer.S')
| -rw-r--r-- | distrib/sdl-1.2.12/src/timer/mint/SDL_vbltimer.S | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/distrib/sdl-1.2.12/src/timer/mint/SDL_vbltimer.S b/distrib/sdl-1.2.12/src/timer/mint/SDL_vbltimer.S deleted file mode 100644 index f9c4be9..0000000 --- a/distrib/sdl-1.2.12/src/timer/mint/SDL_vbltimer.S +++ /dev/null @@ -1,159 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ - -/* - * VBL queue routine - * - * Patrice Mandin - */ - -#define _vbl_queue 0x456 -#define _hz_200 0x4ba - - .text - - .globl _SDL_AtariVblInstall - .globl _SDL_AtariVblUninstall - - .globl _SDL_MintAudio_hasfpu - -/*--- Vector installer ---*/ - -_SDL_AtariVblInstall: - movel sp@(4),my_vector - lea _my_vbl,a0 - - clrw vbl_mutex - movel _hz_200.w, _SDL_Atari_hz200 - - /* Stop interrupts */ - - movew #0x2700,sr - - /* Read vbl_queue pointer */ - movel _vbl_queue.w,a1 - - /* Search a free place */ - moveq #7,d0 -bcl_search_place: - movel (a1),d1 - beqs place_found - addql #4,a1 - dbra d0,bcl_search_place - - /* Not found */ - moveq #1,d0 - bras exit_vbl_queue - - /* Then install ourselves */ -place_found: - movel a0,(a1) - moveq #0,d0 - -exit_vbl_queue: - /* Restart interrupts */ - movew #0x2300,sr - - rts - -/*--- Vector uninstaller ---*/ - -_SDL_AtariVblUninstall: - movel sp@(4),d0 - cmpl my_vector,d0 - bnes badvector - - movel #_my_vbl,d0 - - /* Stop interrupts */ - - movew #0x2700,sr - - /* Read vbl_queue pointer */ - movel _vbl_queue.w,a1 - - /* Search where we are */ - moveq #7,d1 -bcl2_search_place: - cmpl (a1),d0 - bnes next_place - clrl (a1) - moveq #0,d1 -next_place: - addql #4,a1 - dbra d1,bcl2_search_place - - /* Restart interrupts */ - movew #0x2300,sr -badvector: - rts - -/*--- Our vbl ---*/ - -_my_vbl: - /* Update _hz_200 */ - movel _hz_200.w, _SDL_Atari_hz200 - - /* Verify if this is not already running */ - - tstw vbl_mutex - bnes vbl_end - notw vbl_mutex - - moveml d0-d7/a0-a6,sp@- - - /* Save FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_AtariVbl_nofpu1 - .chip 68060 - fsave sp@- - fmoveml fpcr/fpsr/fpiar,sp@- - fmovemx fp0-fp7,sp@- - .chip 68000 -SDL_AtariVbl_nofpu1: - - movel my_vector,a0 - jsr a0@ - - /* Restore FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_AtariVbl_Xbios_nofpu2 - .chip 68060 - fmovemx sp@+,fp0-fp7 - fmoveml sp@+,fpcr/fpsr/fpiar - frestore sp@+ - .chip 68000 -SDL_AtariVbl_Xbios_nofpu2: - - moveml sp@+,d0-d7/a0-a6 - - clrw vbl_mutex -vbl_end: - rts - - .data - .even - .comm _SDL_Atari_hz200,4*1 - .even - .comm vbl_mutex,2*1 - .even - .comm my_vector,4*1 |