Mercurial > sdl-ios-xcode
diff src/audio/SDL_mixer_m68k.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 10 Jul 2006 21:04:37 +0000 |
| parents | d910939febfa |
| children | 99210400e8b9 |
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--- a/src/audio/SDL_mixer_m68k.c Thu Jul 06 18:01:37 2006 +0000 +++ b/src/audio/SDL_mixer_m68k.c Mon Jul 10 21:04:37 2006 +0000 @@ -28,184 +28,113 @@ */ #if defined(__M68000__) && defined(__GNUC__) -void SDL_MixAudio_m68k_U8(char* dst, char* src, long len, long volume, char* mix8) +void +SDL_MixAudio_m68k_U8(char *dst, char *src, long len, long volume, char *mix8) { - __asm__ __volatile__ ( - - "tstl %2\n" -" beqs stoploop_u8\n" -"mixloop_u8:\n" - - /* Mix a sample */ - -" moveq #0,%%d0\n" -" moveq #0,%%d1\n" - -" moveb %1@+,%%d0\n" /* d0 = *src++ */ -" sub #128,%%d0\n" /* d0 -= 128 */ -" muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ -" moveb %0@,%%d1\n" /* d1 = *dst */ -" asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ -" add #128,%%d0\n" /* d0 += 128 */ - -" add %%d1,%%d0\n" - -" moveb %4@(%%d0:w),%0@+\n" - - /* Loop till done */ - -" subql #1,%2\n" -" bhis mixloop_u8\n" -"stoploop_u8:\n" - - : /* no return value */ - : /* input */ - "a"(dst), "a"(src), "d"(len), "d"(volume), "a"(mix8) - : /* clobbered registers */ - "d0", "d1", "cc", "memory" - ); + __asm__ __volatile__("tstl %2\n" " beqs stoploop_u8\n" "mixloop_u8:\n" + /* Mix a sample */ + " moveq #0,%%d0\n" " moveq #0,%%d1\n" " moveb %1@+,%%d0\n" /* d0 = *src++ */ + " sub #128,%%d0\n" /* d0 -= 128 */ + " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ + " moveb %0@,%%d1\n" /* d1 = *dst */ + " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ + " add #128,%%d0\n" /* d0 += 128 */ + " add %%d1,%%d0\n" + " moveb %4@(%%d0:w),%0@+\n" + /* Loop till done */ + " subql #1,%2\n" " bhis mixloop_u8\n" "stoploop_u8:\n": /* no return value */ + : /* input */ + "a"(dst), "a"(src), "d"(len), "d"(volume), "a"(mix8): /* clobbered registers */ + "d0", "d1", "cc", "memory"); } -void SDL_MixAudio_m68k_S8(char* dst, char* src, long len, long volume) +void +SDL_MixAudio_m68k_S8(char *dst, char *src, long len, long volume) { - __asm__ __volatile__ ( - - "tstl %2\n" -" beqs stoploop_s8\n" -" moveq #-128,%%d2\n" -" moveq #127,%%d3\n" -"mixloop_s8:\n" - - /* Mix a sample */ - -" moveq #0,%%d0\n" -" moveq #0,%%d1\n" - -" moveb %1@+,%%d0\n" /* d0 = *src++ */ -" muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ -" moveb %0@,%%d1\n" /* d1 = *dst */ -" asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ - -" add %%d1,%%d0\n" - -" cmp %%d2,%%d0\n" -" bges lower_limit_s8\n" -" move %%d2,%%d0\n" -"lower_limit_s8:\n" - -" cmp %%d3,%%d0\n" -" bles upper_limit_s8\n" -" move %%d3,%%d0\n" -"upper_limit_s8:\n" -" moveb %%d0,%0@+\n" - - /* Loop till done */ - -" subql #1,%2\n" -" bhis mixloop_s8\n" -"stoploop_s8:\n" - - : /* no return value */ - : /* input */ - "a"(dst), "a"(src), "d"(len), "d"(volume) - : /* clobbered registers */ - "d0", "d1", "d2", "d3", "cc", "memory" - ); + __asm__ __volatile__("tstl %2\n" + " beqs stoploop_s8\n" + " moveq #-128,%%d2\n" + " moveq #127,%%d3\n" "mixloop_s8:\n" + /* Mix a sample */ + " moveq #0,%%d0\n" " moveq #0,%%d1\n" " moveb %1@+,%%d0\n" /* d0 = *src++ */ + " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ + " moveb %0@,%%d1\n" /* d1 = *dst */ + " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ + " add %%d1,%%d0\n" + " cmp %%d2,%%d0\n" + " bges lower_limit_s8\n" + " move %%d2,%%d0\n" + "lower_limit_s8:\n" + " cmp %%d3,%%d0\n" + " bles upper_limit_s8\n" + " move %%d3,%%d0\n" + "upper_limit_s8:\n" " moveb %%d0,%0@+\n" + /* Loop till done */ + " subql #1,%2\n" " bhis mixloop_s8\n" "stoploop_s8:\n": /* no return value */ + : /* input */ + "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */ + "d0", "d1", "d2", "d3", "cc", "memory"); } -void SDL_MixAudio_m68k_S16MSB(short* dst, short* src, long len, long volume) +void +SDL_MixAudio_m68k_S16MSB(short *dst, short *src, long len, long volume) { - __asm__ __volatile__ ( - - "tstl %2\n" -" beqs stoploop_s16msb\n" -" movel #-32768,%%d2\n" -" movel #32767,%%d3\n" -" lsrl #1,%2\n" -"mixloop_s16msb:\n" - - /* Mix a sample */ - -" move %1@+,%%d0\n" /* d0 = *src++ */ -" muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ -" move %0@,%%d1\n" /* d1 = *dst */ -" extl %%d1\n" /* extend d1 to 32 bits */ -" asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ - -" addl %%d1,%%d0\n" - -" cmpl %%d2,%%d0\n" -" bges lower_limit_s16msb\n" -" move %%d2,%%d0\n" -"lower_limit_s16msb:\n" - -" cmpl %%d3,%%d0\n" -" bles upper_limit_s16msb\n" -" move %%d3,%%d0\n" -"upper_limit_s16msb:\n" -" move %%d0,%0@+\n" - - /* Loop till done */ - -" subql #1,%2\n" -" bhis mixloop_s16msb\n" -"stoploop_s16msb:\n" - - : /* no return value */ - : /* input */ - "a"(dst), "a"(src), "d"(len), "d"(volume) - : /* clobbered registers */ - "d0", "d1", "d2", "d3", "cc", "memory" - ); + __asm__ __volatile__("tstl %2\n" + " beqs stoploop_s16msb\n" + " movel #-32768,%%d2\n" + " movel #32767,%%d3\n" + " lsrl #1,%2\n" "mixloop_s16msb:\n" + /* Mix a sample */ + " move %1@+,%%d0\n" /* d0 = *src++ */ + " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ + " move %0@,%%d1\n" /* d1 = *dst */ + " extl %%d1\n" /* extend d1 to 32 bits */ + " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ + " addl %%d1,%%d0\n" + " cmpl %%d2,%%d0\n" + " bges lower_limit_s16msb\n" + " move %%d2,%%d0\n" + "lower_limit_s16msb:\n" + " cmpl %%d3,%%d0\n" + " bles upper_limit_s16msb\n" + " move %%d3,%%d0\n" + "upper_limit_s16msb:\n" " move %%d0,%0@+\n" + /* Loop till done */ + " subql #1,%2\n" " bhis mixloop_s16msb\n" "stoploop_s16msb:\n": /* no return value */ + : /* input */ + "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */ + "d0", "d1", "d2", "d3", "cc", "memory"); } -void SDL_MixAudio_m68k_S16LSB(short* dst, short* src, long len, long volume) +void +SDL_MixAudio_m68k_S16LSB(short *dst, short *src, long len, long volume) { - __asm__ __volatile__ ( - - "tstl %2\n" -" beqs stoploop_s16lsb\n" -" movel #-32768,%%d2\n" -" movel #32767,%%d3\n" -" lsrl #1,%2\n" -"mixloop_s16lsb:\n" - - /* Mix a sample */ - -" move %1@+,%%d0\n" /* d0 = *src++ */ -" rorw #8,%%d0\n" -" muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ -" move %0@,%%d1\n" /* d1 = *dst */ -" rorw #8,%%d1\n" -" extl %%d1\n" /* extend d1 to 32 bits */ -" asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ - -" addl %%d1,%%d0\n" - -" cmpl %%d2,%%d0\n" -" bges lower_limit_s16lsb\n" -" move %%d2,%%d0\n" -"lower_limit_s16lsb:\n" - -" cmpl %%d3,%%d0\n" -" bles upper_limit_s16lsb\n" -" move %%d3,%%d0\n" -"upper_limit_s16lsb:\n" -" rorw #8,%%d0\n" -" move %%d0,%0@+\n" - - /* Loop till done */ - -" subql #1,%2\n" -" bhis mixloop_s16lsb\n" -"stoploop_s16lsb:\n" - - : /* no return value */ - : /* input */ - "a"(dst), "a"(src), "d"(len), "d"(volume) - : /* clobbered registers */ - "d0", "d1", "d2", "d3", "cc", "memory" - ); + __asm__ __volatile__("tstl %2\n" + " beqs stoploop_s16lsb\n" + " movel #-32768,%%d2\n" + " movel #32767,%%d3\n" + " lsrl #1,%2\n" "mixloop_s16lsb:\n" + /* Mix a sample */ + " move %1@+,%%d0\n" /* d0 = *src++ */ + " rorw #8,%%d0\n" " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */ + " move %0@,%%d1\n" /* d1 = *dst */ + " rorw #8,%%d1\n" " extl %%d1\n" /* extend d1 to 32 bits */ + " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */ + " addl %%d1,%%d0\n" + " cmpl %%d2,%%d0\n" + " bges lower_limit_s16lsb\n" + " move %%d2,%%d0\n" + "lower_limit_s16lsb:\n" + " cmpl %%d3,%%d0\n" + " bles upper_limit_s16lsb\n" + " move %%d3,%%d0\n" + "upper_limit_s16lsb:\n" + " rorw #8,%%d0\n" " move %%d0,%0@+\n" + /* Loop till done */ + " subql #1,%2\n" " bhis mixloop_s16lsb\n" "stoploop_s16lsb:\n": /* no return value */ + : /* input */ + "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */ + "d0", "d1", "d2", "d3", "cc", "memory"); } #endif - +/* vi: set ts=4 sw=4 expandtab: */