sdl-ios-xcode: src/audio/SDL_mixer

annotate src/audio/SDL_mixer_m68k.c @ 1118:65f4b2dd46b7

Date: Wed, 17 Aug 2005 11:23:40 -0400 From: Matt L <prometheus.uw@gmail.com> To: "Ryan C. Gordon" <icculus@clutteredmind.org> Subject: SDL Patch Hio, I saw your last call on the mailing list. Here's a patch which I submitted about two weeks ago which hasn't made it in. In the current sdl.m4, there's a bug where if your configure.ac, you have AC_LANG(C++) specified, it won't properly compile and link the SDL test program when you run the configure script. This is because only the default CFLAGS is overriden in sdl.m4, and in the patch below, I've fixed it so it overrides CXXFLAGS as well, allowing it to work with g++.

author	Ryan C. Gordon <icculus@icculus.org>
date	Thu, 18 Aug 2005 06:06:02 +0000
parents	b8d311d90021
children	d910939febfa

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 */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	22
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 m68k assembly mix routines
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	25
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	26 Patrice Mandin
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	27 */
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 #if defined(__M68000__) && defined(__GNUC__)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	30 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	31 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	32 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	33
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	34 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	35 " beqs stoploop_u8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	36 "mixloop_u8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	37
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	38 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	39
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	40 " moveq #0,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	41 " moveq #0,%%d1\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	42
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	43 " moveb %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	44 " sub #128,%%d0\n" /* d0 -= 128 */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	45 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	46 " moveb %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	47 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	48 " add #128,%%d0\n" /* d0 += 128 */
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 " add %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	51
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	52 " moveb %4@(%%d0:w),%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	53
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	54 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	55
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	56 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	57 " bhis mixloop_u8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	58 "stoploop_u8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	59
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	60 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	61 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	62 "a"(dst), "a"(src), "d"(len), "d"(volume), "a"(mix8)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	63 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	64 "d0", "d1", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	65 );
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 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	69 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	70 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	71
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	72 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	73 " beqs stoploop_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	74 " moveq #-128,%%d2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	75 " moveq #127,%%d3\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	76 "mixloop_s8:\n"
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 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	79
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	80 " moveq #0,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	81 " moveq #0,%%d1\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	82
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	83 " moveb %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	84 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	85 " moveb %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	86 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	87
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	88 " add %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	89
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	90 " cmp %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	91 " bges lower_limit_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	92 " move %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	93 "lower_limit_s8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	94
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	95 " cmp %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	96 " bles upper_limit_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	97 " move %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	98 "upper_limit_s8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	99 " moveb %%d0,%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	100
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	101 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	102
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	103 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	104 " bhis mixloop_s8\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	105 "stoploop_s8:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	106
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	107 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	108 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	109 "a"(dst), "a"(src), "d"(len), "d"(volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	110 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	111 "d0", "d1", "d2", "d3", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	112 );
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 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	116 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	117 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	118
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	119 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	120 " beqs stoploop_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	121 " movel #-32768,%%d2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	122 " movel #32767,%%d3\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	123 " lsrl #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	124 "mixloop_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	125
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	126 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	127
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	128 " move %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	129 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	130 " move %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	131 " extl %%d1\n" /* extend d1 to 32 bits */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	132 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	133
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	134 " addl %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	135
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	136 " cmpl %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	137 " bges lower_limit_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	138 " move %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	139 "lower_limit_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	140
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	141 " cmpl %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	142 " bles upper_limit_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	143 " move %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	144 "upper_limit_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	145 " move %%d0,%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	146
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	147 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	148
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	149 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	150 " bhis mixloop_s16msb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	151 "stoploop_s16msb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	152
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	153 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	154 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	155 "a"(dst), "a"(src), "d"(len), "d"(volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	156 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	157 "d0", "d1", "d2", "d3", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	158 );
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 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	162 {
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	163 __asm__ __volatile__ (
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	164
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	165 "tstl %2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	166 " beqs stoploop_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	167 " movel #-32768,%%d2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	168 " movel #32767,%%d3\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	169 " lsrl #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	170 "mixloop_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	171
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	172 /* Mix a sample */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	173
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	174 " move %1@+,%%d0\n" /* d0 = src++ /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	175 " rorw #8,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	176 " muls %3,%%d0\n" /* d0 = volume (0<=volume<=128) /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	177 " move %0@,%%d1\n" /* d1 = dst /
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	178 " rorw #8,%%d1\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	179 " extl %%d1\n" /* extend d1 to 32 bits */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	180 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	181
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	182 " addl %%d1,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	183
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	184 " cmpl %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	185 " bges lower_limit_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	186 " move %%d2,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	187 "lower_limit_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	188
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	189 " cmpl %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	190 " bles upper_limit_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	191 " move %%d3,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	192 "upper_limit_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	193 " rorw #8,%%d0\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	194 " move %%d0,%0@+\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	195
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	196 /* Loop till done */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	197
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	198 " subql #1,%2\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	199 " bhis mixloop_s16lsb\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	200 "stoploop_s16lsb:\n"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	201
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	202 : /* no return value */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	203 : /* input */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	204 "a"(dst), "a"(src), "d"(len), "d"(volume)
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	205 : /* clobbered registers */
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	206 "d0", "d1", "d2", "d3", "cc", "memory"
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	207 );
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 #endif
873c2598f969 Add m68k assembly mixing routines Patrice Mandin <patmandin@gmail.com> parents: diff changeset	210

Mercurial > sdl-ios-xcode

annotate src/audio/SDL_mixer_m68k.c @ 1118:65f4b2dd46b7