sdl-ios-xcode: src/audio/SDL_mixer

annotate src/audio/SDL_mixer_m68k.c @ 1888:488eba319a25

------- Comment #5 From Marc Peter 2006-06-25 18:03 [reply] ------- Created an attachment (id=142) [edit] updated makefiles for 1.2.11 release The new Watcom-Win32.zip - includes the new testcursor test, and - doesn't link to dxguid.lib anymore (by defining INITGUID for SDL_dx5events.c), to fix issue with stack calling convention (-6s can now be used instead of -6r in CFLAGS). ------- Comment #6 From Marc Peter 2006-06-25 18:12 [reply] ------- Created an attachment (id=143) [edit] updated README.Watcom for 1.2.11 - lists new testcursor test - mentions possibility to build with -6s (stack calling convention) instead of -6r (register calling convention)

author	Sam Lantinga <slouken@libsdl.org>
date	Mon, 26 Jun 2006 01:33:53 +0000
parents	d910939febfa
children	782fd950bd46 c121d94672cb a1b03ba2fcd0

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__)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	31 void SDL_MixAudio_m68k_U8(char* dst, char* src, long len, long volume, char* mix8)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	32 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	33 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	34
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	35 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	36 " beqs stoploop_u8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	37 "mixloop_u8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	38
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	39 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	40
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	41 " moveq #0,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	42 " moveq #0,%%d1\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	43
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	44 " moveb %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	45 " sub #128,%%d0\n" /* d0 -= 128 */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	46 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	47 " moveb %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	48 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	49 " add #128,%%d0\n" /* d0 += 128 */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	50
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	51 " add %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	52
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	53 " moveb %4@(%%d0:w),%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	54
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	55 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	56
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	57 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	58 " bhis mixloop_u8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	59 "stoploop_u8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	60
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	61 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	62 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	63 "a"(dst), "a"(src), "d"(len), "d"(volume), "a"(mix8)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	64 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	65 "d0", "d1", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	66 );
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	67 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	68
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	69 void SDL_MixAudio_m68k_S8(char* dst, char* src, long len, long volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	70 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	71 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	72
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	73 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	74 " beqs stoploop_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	75 " moveq #-128,%%d2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	76 " moveq #127,%%d3\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	77 "mixloop_s8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	78
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	79 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	80
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	81 " moveq #0,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	82 " moveq #0,%%d1\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	83
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	84 " moveb %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	85 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	86 " moveb %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	87 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	88
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	89 " add %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	90
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	91 " cmp %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	92 " bges lower_limit_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	93 " move %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	94 "lower_limit_s8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	95
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	96 " cmp %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	97 " bles upper_limit_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	98 " move %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	99 "upper_limit_s8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	100 " moveb %%d0,%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	101
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	102 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	103
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	104 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	105 " bhis mixloop_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	106 "stoploop_s8:\n"
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 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	109 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	110 "a"(dst), "a"(src), "d"(len), "d"(volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	111 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	112 "d0", "d1", "d2", "d3", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	113 );
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	114 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	115
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	116 void SDL_MixAudio_m68k_S16MSB(short* dst, short* src, long len, long volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	117 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	118 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	119
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	120 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	121 " beqs stoploop_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	122 " movel #-32768,%%d2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	123 " movel #32767,%%d3\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	124 " lsrl #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	125 "mixloop_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	126
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	127 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	128
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	129 " move %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	130 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	131 " move %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	132 " extl %%d1\n" /* extend d1 to 32 bits */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	133 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	134
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	135 " addl %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	136
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	137 " cmpl %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	138 " bges lower_limit_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	139 " move %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	140 "lower_limit_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	141
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	142 " cmpl %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	143 " bles upper_limit_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	144 " move %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	145 "upper_limit_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	146 " move %%d0,%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	147
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	148 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	149
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	150 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	151 " bhis mixloop_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	152 "stoploop_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	153
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	154 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	155 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	156 "a"(dst), "a"(src), "d"(len), "d"(volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	157 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	158 "d0", "d1", "d2", "d3", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	159 );
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	160 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	161
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	162 void SDL_MixAudio_m68k_S16LSB(short* dst, short* src, long len, long volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	163 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	164 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	165
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	166 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	167 " beqs stoploop_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	168 " movel #-32768,%%d2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	169 " movel #32767,%%d3\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	170 " lsrl #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	171 "mixloop_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	172
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	173 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	174
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	175 " move %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	176 " rorw #8,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	177 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	178 " move %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	179 " rorw #8,%%d1\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	180 " extl %%d1\n" /* extend d1 to 32 bits */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	181 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	182
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	183 " addl %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	184
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	185 " cmpl %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	186 " bges lower_limit_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	187 " move %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	188 "lower_limit_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	189
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	190 " cmpl %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	191 " bles upper_limit_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	192 " move %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	193 "upper_limit_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	194 " rorw #8,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	195 " move %%d0,%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	196
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	197 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	198
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	199 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	200 " bhis mixloop_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	201 "stoploop_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	202
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	203 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	204 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	205 "a"(dst), "a"(src), "d"(len), "d"(volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	206 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	207 "d0", "d1", "d2", "d3", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	208 );
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	209 }
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	210 #endif
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	211

Mercurial > sdl-ios-xcode

annotate src/audio/SDL_mixer_m68k.c @ 1888:488eba319a25