diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_it.S')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_it.S | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_it.S b/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_it.S deleted file mode 100644 index c751a59..0000000 --- a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_it.S +++ /dev/null @@ -1,281 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public - License as published by the Free Software Foundation; either - version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with this library; if not, write to the Free - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - Sam Lantinga - slouken@libsdl.org -*/ - -/* - Audio interrupts - - Patrice Mandin, Didier Méquignon - */ - - .text - - .globl _SDL_MintAudio_Callback - - .globl _SDL_MintAudio_XbiosInterrupt - .globl _SDL_MintAudio_XbiosInterruptMeasureClock - .globl _SDL_MintAudio_Dma8Interrupt - .globl _SDL_MintAudio_StfaInterrupt - - .globl _SDL_MintAudio_mutex - .globl _SDL_MintAudio_audiobuf - .globl _SDL_MintAudio_numbuf - .globl _SDL_MintAudio_audiosize - .globl _SDL_MintAudio_clocktics - .globl _SDL_MintAudio_hasfpu - - .globl _SDL_MintAudio_stfa - -/* - How it works: - - Audio is playing buffer #0 (resp. #1) - - We must calculate a sample in buffer #1 (resp. #0) - so we first call the callback to do it - - Then we swap the buffers -*/ - -#define savptr 0x4a2 -#define savamt 0x46 - -/*--- Xbios interrupt vector to measure Falcon external clock ---*/ - -_SDL_MintAudio_XbiosInterruptMeasureClock: /* 1 mS */ - - btst #0,0xFFFF8901:w /* state DMA sound */ - beqs SDL_MintAudio_EndIntMeasure - addql #1,_SDL_MintAudio_clocktics -SDL_MintAudio_EndIntMeasure: - bclr #5,0xFFFFFA0F:w /* Clear service bit */ - rte - -/*--- Xbios interrupt vector ---*/ - -_SDL_MintAudio_XbiosInterrupt: - - /* Reenable interrupts, so other interrupts can work */ - movew #0x2300,sr - - /* Clear service bit, so other MFP interrupts can work */ - bclr #5,0xfffffa0f:w - - /* Check if we are not already running */ - tstw _SDL_MintAudio_mutex - bne SDL_MintAudio_XbiosEnd - notw _SDL_MintAudio_mutex - - /* Swap buffers */ - eorw #1,_SDL_MintAudio_numbuf - - moveml d0-d7/a0-a6,sp@- - - /* Save FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_MintAudio_Xbios_nofpu1 - .chip 68060 - fsave sp@- - fmoveml fpcr/fpsr/fpiar,sp@- - fmovemx fp0-fp7,sp@- - .chip 68000 -SDL_MintAudio_Xbios_nofpu1: - - /* Callback */ - jsr _SDL_MintAudio_Callback - - /* Restore FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_MintAudio_Xbios_nofpu2 - .chip 68060 - fmovemx sp@+,fp0-fp7 - fmoveml sp@+,fpcr/fpsr/fpiar - frestore sp@+ - .chip 68000 -SDL_MintAudio_Xbios_nofpu2: - - /* Reserve space for registers */ - subl #savamt,savptr - - /* Set new buffer */ - - moveq #0,d0 - movel _SDL_MintAudio_audiosize,d1 - - movew _SDL_MintAudio_numbuf,d0 - lsll #2,d0 - lea _SDL_MintAudio_audiobuf,a0 - movel a0@(d0:l),a1 - - lea a1@(d1:l),a2 - - movel a2,sp@- - movel a1,sp@- - clrw sp@- - movew #131,sp@- - trap #14 - lea sp@(12),sp - - /* Restore registers space */ - addl #savamt,savptr - - moveml sp@+,d0-d7/a0-a6 - - clrw _SDL_MintAudio_mutex -SDL_MintAudio_XbiosEnd: - rte - -/*--- DMA 8 bits interrupt vector ---*/ - -_SDL_MintAudio_Dma8Interrupt: - - /* Reenable interrupts, so other interrupts can work */ - movew #0x2300,sr - - /* Clear service bit, so other MFP interrupts can work */ - bclr #5,0xfffffa0f:w - - /* Check if we are not already running */ - tstw _SDL_MintAudio_mutex - bne SDL_MintAudio_Dma8End - notw _SDL_MintAudio_mutex - - /* Swap buffers */ - eorw #1,_SDL_MintAudio_numbuf - - moveml d0-d1/a0-a1,sp@- - - /* Save FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_MintAudio_Dma8_nofpu1 - .chip 68060 - fsave sp@- - fmoveml fpcr/fpsr/fpiar,sp@- - fmovemx fp0-fp7,sp@- - .chip 68000 -SDL_MintAudio_Dma8_nofpu1: - - /* Callback */ - jsr _SDL_MintAudio_Callback - - /* Restore FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_MintAudio_Dma8_nofpu2 - .chip 68060 - fmovemx sp@+,fp0-fp7 - fmoveml sp@+,fpcr/fpsr/fpiar - frestore sp@+ - .chip 68000 -SDL_MintAudio_Dma8_nofpu2: - - /* Set new buffer */ - - moveq #0,d0 - - movew _SDL_MintAudio_numbuf,d0 - lslw #2,d0 - lea _SDL_MintAudio_audiobuf,a0 - movel a0@(d0:w),d1 - - /* Modify DMA addresses */ - lea 0xffff8900:w,a0 - - moveb d1,a0@(0x07) /* Start address */ - rorl #8,d1 - moveb d1,a0@(0x05) - rorl #8,d1 - moveb d1,a0@(0x03) - swap d1 - - addl _SDL_MintAudio_audiosize,d1 - - moveb d1,a0@(0x13) /* End address */ - rorl #8,d1 - moveb d1,a0@(0x11) - rorl #8,d1 - moveb d1,a0@(0x0f) - - moveml sp@+,d0-d1/a0-a1 - - clrw _SDL_MintAudio_mutex -SDL_MintAudio_Dma8End: - rte - -/*--- STFA interrupt vector ---*/ - -STFA_SOUND_START = 6 -STFA_SOUND_END = STFA_SOUND_START+8 - -_SDL_MintAudio_StfaInterrupt: - - /* Reenable interrupts, so other interrupts can work */ - movew #0x2300,sr - - /* Check if we are not already running */ - tstw _SDL_MintAudio_mutex - bnes SDL_MintAudio_StfaEnd - notw _SDL_MintAudio_mutex - - /* Swap buffers */ - eorw #1,_SDL_MintAudio_numbuf - - moveml d0-d7/a0-a6,sp@- - - /* Save FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_MintAudio_Stfa_nofpu1 - .chip 68060 - fsave sp@- - fmoveml fpcr/fpsr/fpiar,sp@- - fmovemx fp0-fp7,sp@- - .chip 68000 -SDL_MintAudio_Stfa_nofpu1: - - /* Callback */ - jsr _SDL_MintAudio_Callback - - /* Restore FPU if needed */ - tstw _SDL_MintAudio_hasfpu - beqs SDL_MintAudio_Stfa_nofpu2 - .chip 68060 - fmovemx sp@+,fp0-fp7 - fmoveml sp@+,fpcr/fpsr/fpiar - frestore sp@+ - .chip 68000 -SDL_MintAudio_Stfa_nofpu2: - - /* Set new buffer */ - - moveq #0,d0 - movel _SDL_MintAudio_stfa,a1 - - movew _SDL_MintAudio_numbuf,d0 - lslw #2,d0 - lea _SDL_MintAudio_audiobuf,a0 - movel a0@(d0:w),d1 - - /* Modify STFA replay buffers */ - movel d1,a1@(STFA_SOUND_START) - addl _SDL_MintAudio_audiosize,d1 - movel d1,a1@(STFA_SOUND_END) - - moveml sp@+,d0-d7/a0-a6 - - clrw _SDL_MintAudio_mutex -SDL_MintAudio_StfaEnd: - rte |