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annotate src/audio/SDL_mixer_MMX.c @ 4515:54cbc34229f4

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Fixed compile warnings
author Sam Lantinga <slouken@libsdl.org>
date Tue, 13 Jul 2010 22:26:50 -0700
parents f7b03b6838cb
children b530ef003506
rev   line source
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d910939febfa Use consistent identifiers for the various platforms we support.
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1 /*
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2 SDL - Simple DirectMedia Layer
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f7b03b6838cb Fixed bug #926
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
d910939febfa Use consistent identifiers for the various platforms we support.
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5 This library is free software; you can redistribute it and/or
d910939febfa Use consistent identifiers for the various platforms we support.
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6 modify it under the terms of the GNU Lesser General Public
d910939febfa Use consistent identifiers for the various platforms we support.
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7 License as published by the Free Software Foundation; either
d910939febfa Use consistent identifiers for the various platforms we support.
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8 version 2.1 of the License, or (at your option) any later version.
d910939febfa Use consistent identifiers for the various platforms we support.
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9
d910939febfa Use consistent identifiers for the various platforms we support.
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10 This library is distributed in the hope that it will be useful,
d910939febfa Use consistent identifiers for the various platforms we support.
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
d910939febfa Use consistent identifiers for the various platforms we support.
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
d910939febfa Use consistent identifiers for the various platforms we support.
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13 Lesser General Public License for more details.
d910939febfa Use consistent identifiers for the various platforms we support.
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14
d910939febfa Use consistent identifiers for the various platforms we support.
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15 You should have received a copy of the GNU Lesser General Public
d910939febfa Use consistent identifiers for the various platforms we support.
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16 License along with this library; if not, write to the Free Software
d910939febfa Use consistent identifiers for the various platforms we support.
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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24 /*
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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25 MMX assembler version of SDL_MixAudio for signed little endian 16 bit samples and signed 8 bit samples
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
Sam Lantinga <slouken@libsdl.org>
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26 Copyright 2002 Stephane Marchesin (stephane.marchesin@wanadoo.fr)
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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27 This code is licensed under the LGPL (see COPYING for details)
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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28
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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29 Assumes buffer size in bytes is a multiple of 16
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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30 Assumes SDL_MIX_MAXVOLUME = 128
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31 */
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32
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33
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34 /***********************************************
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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35 * Mixing for 16 bit signed buffers
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36 ***********************************************/
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37
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4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
Ryan C. Gordon <icculus@icculus.org>
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38 #if defined(SDL_BUGGY_MMX_MIXERS) /* buggy, so we're disabling them. --ryan. */
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39 #if defined(__GNUC__) && defined(__i386__) && defined(SDL_ASSEMBLY_ROUTINES)
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40 void
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41 SDL_MixAudio_MMX_S16(char *dst, char *src, unsigned int size, int volume)
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42 {
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43 __asm__ __volatile__(" movl %3,%%eax\n" /* eax = volume */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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44 " movl %2,%%edx\n" /* edx = size */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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45 " shrl $4,%%edx\n" /* process 16 bytes per iteration = 8 samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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46 " jz .endS16\n" " pxor %%mm0,%%mm0\n" " movd %%eax,%%mm0\n" " movq %%mm0,%%mm1\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" /* mm0 = vol|vol|vol|vol */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
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47 ".align 8\n" " .mixloopS16:\n" " movq (%1),%%mm1\n" /* mm1 = a|b|c|d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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48 " movq %%mm1,%%mm2\n" /* mm2 = a|b|c|d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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49 " movq 8(%1),%%mm4\n" /* mm4 = e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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50 /* pré charger le buffer dst dans mm7 */
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51 " movq (%0),%%mm7\n" /* mm7 = dst[0] */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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52 /* multiplier par le volume */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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53 " pmullw %%mm0,%%mm1\n" /* mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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54 " pmulhw %%mm0,%%mm2\n" /* mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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55 " movq %%mm4,%%mm5\n" /* mm5 = e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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56 " pmullw %%mm0,%%mm4\n" /* mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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57 " pmulhw %%mm0,%%mm5\n" /* mm5 = h(e*v)|h(f*v)|h(g*v)|h(h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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58 " movq %%mm1,%%mm3\n" /* mm3 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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59 " punpckhwd %%mm2,%%mm1\n" /* mm1 = a*v|b*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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60 " movq %%mm4,%%mm6\n" /* mm6 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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61 " punpcklwd %%mm2,%%mm3\n" /* mm3 = c*v|d*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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62 " punpckhwd %%mm5,%%mm4\n" /* mm4 = e*f|f*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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63 " punpcklwd %%mm5,%%mm6\n" /* mm6 = g*v|h*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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64 /* pré charger le buffer dst dans mm5 */
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65 " movq 8(%0),%%mm5\n" /* mm5 = dst[1] */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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66 /* diviser par 128 */
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67 " psrad $7,%%mm1\n" /* mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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68 " add $16,%1\n" " psrad $7,%%mm3\n" /* mm3 = c*v/128|d*v/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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69 " psrad $7,%%mm4\n" /* mm4 = e*v/128|f*v/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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70 /* mm1 = le sample avec le volume modifié */
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71 " packssdw %%mm1,%%mm3\n" /* mm3 = s(a*v|b*v|c*v|d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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72 " psrad $7,%%mm6\n" /* mm6= g*v/128|h*v/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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73 " paddsw %%mm7,%%mm3\n" /* mm3 = adjust_volume(src)+dst */
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74 /* mm4 = le sample avec le volume modifié */
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75 " packssdw %%mm4,%%mm6\n" /* mm6 = s(e*v|f*v|g*v|h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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76 " movq %%mm3,(%0)\n" " paddsw %%mm5,%%mm6\n" /* mm6 = adjust_volume(src)+dst */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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77 " movq %%mm6,8(%0)\n"
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78 " add $16,%0\n"
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79 " dec %%edx\n"
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80 " jnz .mixloopS16\n"
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81 " emms\n"
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82 ".endS16:\n"::"r"(dst), "r"(src),
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83 "m"(size), "m"(volume):"eax", "edx", "memory");
539
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84 }
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85
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86
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87
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88 /*////////////////////////////////////////////// */
97d0966f4bf7 Fixed some ultra-pedantic gcc warnings
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89 /* Mixing for 8 bit signed buffers */
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90 /*////////////////////////////////////////////// */
539
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91
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92 void
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93 SDL_MixAudio_MMX_S8(char *dst, char *src, unsigned int size, int volume)
539
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94 {
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95 __asm__ __volatile__(" movl %3,%%eax\n" /* eax = volume */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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96 " movd %%eax,%%mm0\n" " movq %%mm0,%%mm1\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " movl %2,%%edx\n" /* edx = size */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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97 " shr $3,%%edx\n" /* process 8 bytes per iteration = 8 samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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98 " cmp $0,%%edx\n" " je .endS8\n" ".align 8\n" " .mixloopS8:\n" " pxor %%mm2,%%mm2\n" /* mm2 = 0 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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99 " movq (%1),%%mm1\n" /* mm1 = a|b|c|d|e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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100 " movq %%mm1,%%mm3\n" /* mm3 = a|b|c|d|e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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101 /* on va faire le "sign extension" en faisant un cmp avec 0 qui retourne 1 si <0, 0 si >0 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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102 " pcmpgtb %%mm1,%%mm2\n" /* mm2 = 11111111|00000000|00000000.... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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103 " punpckhbw %%mm2,%%mm1\n" /* mm1 = 0|a|0|b|0|c|0|d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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104 " punpcklbw %%mm2,%%mm3\n" /* mm3 = 0|e|0|f|0|g|0|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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105 " movq (%0),%%mm2\n" /* mm2 = destination */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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106 " pmullw %%mm0,%%mm1\n" /* mm1 = v*a|v*b|v*c|v*d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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107 " add $8,%1\n" " pmullw %%mm0,%%mm3\n" /* mm3 = v*e|v*f|v*g|v*h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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108 " psraw $7,%%mm1\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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109 " psraw $7,%%mm3\n" /* mm3 = v*e/128|v*f/128|v*g/128|v*h/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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110 " packsswb %%mm1,%%mm3\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128|v*e/128|v*f/128|v*g/128|v*h/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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111 " paddsb %%mm2,%%mm3\n" /* add to destination buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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112 " movq %%mm3,(%0)\n" /* store back to ram */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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113 " add $8,%0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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114 " dec %%edx\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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115 " jnz .mixloopS8\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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116 ".endS8:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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117 " emms\n"::"r"(dst), "r"(src), "m"(size),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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118 "m"(volume):"eax", "edx", "memory");
539
a9e38f3b8e4d Added MMX audio mixing code for gcc (thanks Stephane!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
119 }
a9e38f3b8e4d Added MMX audio mixing code for gcc (thanks Stephane!)
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parents:
diff changeset
120 #endif
3628
4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
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121
4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
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122 #endif /* SDL_BUGGY_MMX_MIXERS */
4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
diff changeset
123
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
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124 /* vi: set ts=4 sw=4 expandtab: */