sdl-ios-xcode: src/audio/SDL_mixer

annotate src/audio/SDL_mixer_m68k.c @ 2318:0c653886cce7

HandleEvent() returns done each time it is called. If done was set to 0 the program should quit, but because done is not checked until *all* events are handled a following event can reset done to 1 and prevent the program from terminating when told to. I fixed the while loop that handles events to check for the state of done after handling each event. That could leave some events unhandled when the program exits, but it ensures that the program will exit.

author	Bob Pendleton <bob@pendleton.com>
date	Wed, 20 Feb 2008 23:27:33 +0000
parents	c121d94672cb
children	99210400e8b9

rev	line source
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	1 /*
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	2 SDL - Simple DirectMedia Layer
769 b8d311d90021 Updated copyright information for 2004 (Happy New Year!) Sam Lantinga <slouken@libsdl.org> parents: 633 diff changeset	3 Copyright (C) 1997-2004 Sam Lantinga
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	4
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	5 This library is free software; you can redistribute it and/or
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	6 modify it under the terms of the GNU Library General Public
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	7 License as published by the Free Software Foundation; either
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	8 version 2 of the License, or (at your option) any later version.
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	9
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	13 Library General Public License for more details.
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	14
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	15 You should have received a copy of the GNU Library General Public
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	16 License along with this library; if not, write to the Free
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	18
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	19 Sam Lantinga
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	20 slouken@libsdl.org
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	21 */
1402 d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	22 #include "SDL_config.h"
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	23
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	24 /*
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	25 m68k assembly mix routines
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	26
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	27 Patrice Mandin
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	28 */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	29
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	30 #if defined(__M68000__) && defined(__GNUC__)
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	31 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	32 SDL_MixAudio_m68k_U8(char dst, char src, long len, long volume, char *mix8)
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	33 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	34 __asm__ __volatile__("tstl %2\n" " beqs stoploop_u8\n" "mixloop_u8:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	35 /* Mix a sample */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	36 " moveq #0,%%d0\n" " moveq #0,%%d1\n" " moveb %1@+,%%d0\n" /* d0 = src++ /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	37 " sub #128,%%d0\n" /* d0 -= 128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	38 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	39 " moveb %0@,%%d1\n" /* d1 = dst /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	40 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	41 " add #128,%%d0\n" /* d0 += 128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	42 " add %%d1,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	43 " moveb %4@(%%d0:w),%0@+\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	44 /* Loop till done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	45 " subql #1,%2\n" " bhis mixloop_u8\n" "stoploop_u8:\n": /* no return value */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	46 : /* input */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	47 "a"(dst), "a"(src), "d"(len), "d"(volume), "a"(mix8): /* clobbered registers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	48 "d0", "d1", "cc", "memory");
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	49 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	50
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	51 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	52 SDL_MixAudio_m68k_S8(char dst, char src, long len, long volume)
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	53 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	54 __asm__ __volatile__("tstl %2\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	55 " beqs stoploop_s8\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	56 " moveq #-128,%%d2\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	57 " moveq #127,%%d3\n" "mixloop_s8:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	58 /* Mix a sample */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	59 " moveq #0,%%d0\n" " moveq #0,%%d1\n" " moveb %1@+,%%d0\n" /* d0 = src++ /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	60 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	61 " moveb %0@,%%d1\n" /* d1 = dst /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	62 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	63 " add %%d1,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	64 " cmp %%d2,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	65 " bges lower_limit_s8\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	66 " move %%d2,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	67 "lower_limit_s8:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	68 " cmp %%d3,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	69 " bles upper_limit_s8\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	70 " move %%d3,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	71 "upper_limit_s8:\n" " moveb %%d0,%0@+\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	72 /* Loop till done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	73 " subql #1,%2\n" " bhis mixloop_s8\n" "stoploop_s8:\n": /* no return value */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	74 : /* input */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	75 "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	76 "d0", "d1", "d2", "d3", "cc", "memory");
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	77 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	78
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	79 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	80 SDL_MixAudio_m68k_S16MSB(short dst, short src, long len, long volume)
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	81 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	82 __asm__ __volatile__("tstl %2\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	83 " beqs stoploop_s16msb\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	84 " movel #-32768,%%d2\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	85 " movel #32767,%%d3\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	86 " lsrl #1,%2\n" "mixloop_s16msb:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	87 /* Mix a sample */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	88 " move %1@+,%%d0\n" /* d0 = src++ /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	89 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	90 " move %0@,%%d1\n" /* d1 = dst /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	91 " extl %%d1\n" /* extend d1 to 32 bits */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	92 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	93 " addl %%d1,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	94 " cmpl %%d2,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	95 " bges lower_limit_s16msb\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	96 " move %%d2,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	97 "lower_limit_s16msb:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	98 " cmpl %%d3,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	99 " bles upper_limit_s16msb\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	100 " move %%d3,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	101 "upper_limit_s16msb:\n" " move %%d0,%0@+\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	102 /* Loop till done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	103 " subql #1,%2\n" " bhis mixloop_s16msb\n" "stoploop_s16msb:\n": /* no return value */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	104 : /* input */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	105 "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	106 "d0", "d1", "d2", "d3", "cc", "memory");
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	107 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	108
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	109 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	110 SDL_MixAudio_m68k_S16LSB(short dst, short src, long len, long volume)
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	111 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	112 __asm__ __volatile__("tstl %2\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	113 " beqs stoploop_s16lsb\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	114 " movel #-32768,%%d2\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	115 " movel #32767,%%d3\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	116 " lsrl #1,%2\n" "mixloop_s16lsb:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	117 /* Mix a sample */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	118 " move %1@+,%%d0\n" /* d0 = src++ /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	119 " rorw #8,%%d0\n" " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	120 " move %0@,%%d1\n" /* d1 = dst /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	121 " rorw #8,%%d1\n" " extl %%d1\n" /* extend d1 to 32 bits */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	122 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	123 " addl %%d1,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	124 " cmpl %%d2,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	125 " bges lower_limit_s16lsb\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	126 " move %%d2,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	127 "lower_limit_s16lsb:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	128 " cmpl %%d3,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	129 " bles upper_limit_s16lsb\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	130 " move %%d3,%%d0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	131 "upper_limit_s16lsb:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	132 " rorw #8,%%d0\n" " move %%d0,%0@+\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	133 /* Loop till done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	134 " subql #1,%2\n" " bhis mixloop_s16lsb\n" "stoploop_s16lsb:\n": /* no return value */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	135 : /* input */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	136 "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	137 "d0", "d1", "d2", "d3", "cc", "memory");
633 873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	138 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	139 #endif
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	140 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/SDL_mixer_m68k.c @ 2318:0c653886cce7