Mercurial > sdl-ios-xcode

comparison src/audio/SDL_mixer_MMX.c @ 1662:782fd950bd46 SDL-1.3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents 97d0966f4bf7
children 4da1ee79c9af
comparison
equal deleted inserted replaced
1661:281d3f4870e5 1662:782fd950bd46
34 /*********************************************** 34 /***********************************************
35 * Mixing for 16 bit signed buffers 35 * Mixing for 16 bit signed buffers
36 ***********************************************/ 36 ***********************************************/
37 37
38 #if defined(__GNUC__) && defined(__i386__) && defined(SDL_ASSEMBLY_ROUTINES) 38 #if defined(__GNUC__) && defined(__i386__) && defined(SDL_ASSEMBLY_ROUTINES)
39 void SDL_MixAudio_MMX_S16(char* dst,char* src,unsigned int size,int volume) 39 void
40 SDL_MixAudio_MMX_S16 (char *dst, char *src, unsigned int size, int volume)
40 { 41 {
41 __asm__ __volatile__ ( 42 __asm__ __volatile__ (" movl %3,%%eax\n" /* eax = volume */
42 43 " movl %2,%%edx\n" /* edx = size */
43 " movl %3,%%eax\n" /* eax = volume */ 44 " shrl $4,%%edx\n" /* process 16 bytes per iteration = 8 samples */
44 45 " 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 */
45 " movl %2,%%edx\n" /* edx = size */ 46 ".align 8\n" " .mixloopS16:\n" " movq (%1),%%mm1\n" /* mm1 = a|b|c|d */
46 47 " movq %%mm1,%%mm2\n" /* mm2 = a|b|c|d */
47 " shrl $4,%%edx\n" /* process 16 bytes per iteration = 8 samples */ 48 " movq 8(%1),%%mm4\n" /* mm4 = e|f|g|h */
48 49 /* pré charger le buffer dst dans mm7 */
49 " jz .endS16\n" 50 " movq (%0),%%mm7\n" /* mm7 = dst[0] */
50 51 /* multiplier par le volume */
51 " pxor %%mm0,%%mm0\n" 52 " pmullw %%mm0,%%mm1\n" /* mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
52 53 " pmulhw %%mm0,%%mm2\n" /* mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) */
53 " movd %%eax,%%mm0\n" 54 " movq %%mm4,%%mm5\n" /* mm5 = e|f|g|h */
54 " movq %%mm0,%%mm1\n" 55 " pmullw %%mm0,%%mm4\n" /* mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
55 " psllq $16,%%mm0\n" 56 " pmulhw %%mm0,%%mm5\n" /* mm5 = h(e*v)|h(f*v)|h(g*v)|h(h*v) */
56 " por %%mm1,%%mm0\n" 57 " movq %%mm1,%%mm3\n" /* mm3 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
57 " psllq $16,%%mm0\n" 58 " punpckhwd %%mm2,%%mm1\n" /* mm1 = a*v|b*v */
58 " por %%mm1,%%mm0\n" 59 " movq %%mm4,%%mm6\n" /* mm6 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
59 " psllq $16,%%mm0\n" 60 " punpcklwd %%mm2,%%mm3\n" /* mm3 = c*v|d*v */
60 " por %%mm1,%%mm0\n" /* mm0 = vol|vol|vol|vol */ 61 " punpckhwd %%mm5,%%mm4\n" /* mm4 = e*f|f*v */
61 62 " punpcklwd %%mm5,%%mm6\n" /* mm6 = g*v|h*v */
62 ".align 8\n" 63 /* pré charger le buffer dst dans mm5 */
63 " .mixloopS16:\n" 64 " movq 8(%0),%%mm5\n" /* mm5 = dst[1] */
64 65 /* diviser par 128 */
65 " movq (%1),%%mm1\n" /* mm1 = a|b|c|d */ 66 " psrad $7,%%mm1\n" /* mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME */
66 67 " add $16,%1\n" " psrad $7,%%mm3\n" /* mm3 = c*v/128|d*v/128 */
67 " movq %%mm1,%%mm2\n" /* mm2 = a|b|c|d */ 68 " psrad $7,%%mm4\n" /* mm4 = e*v/128|f*v/128 */
68 69 /* mm1 = le sample avec le volume modifié */
69 " movq 8(%1),%%mm4\n" /* mm4 = e|f|g|h */ 70 " packssdw %%mm1,%%mm3\n" /* mm3 = s(a*v|b*v|c*v|d*v) */
70 71 " psrad $7,%%mm6\n" /* mm6= g*v/128|h*v/128 */
71 /* pré charger le buffer dst dans mm7 */ 72 " paddsw %%mm7,%%mm3\n" /* mm3 = adjust_volume(src)+dst */
72 " movq (%0),%%mm7\n" /* mm7 = dst[0] */ 73 /* mm4 = le sample avec le volume modifié */
73 74 " packssdw %%mm4,%%mm6\n" /* mm6 = s(e*v|f*v|g*v|h*v) */
74 /* multiplier par le volume */ 75 " movq %%mm3,(%0)\n" " paddsw %%mm5,%%mm6\n" /* mm6 = adjust_volume(src)+dst */
75 " pmullw %%mm0,%%mm1\n" /* mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */ 76 " movq %%mm6,8(%0)\n"
76 77 " add $16,%0\n"
77 " pmulhw %%mm0,%%mm2\n" /* mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) */ 78 " dec %%edx\n"
78 " movq %%mm4,%%mm5\n" /* mm5 = e|f|g|h */ 79 " jnz .mixloopS16\n"
79 80 " emms\n"
80 " pmullw %%mm0,%%mm4\n" /* mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */ 81 ".endS16:\n"::"r" (dst), "r" (src),
81 82 "m" (size), "m" (volume):"eax", "edx", "memory");
82 " pmulhw %%mm0,%%mm5\n" /* mm5 = h(e*v)|h(f*v)|h(g*v)|h(h*v) */
83 " movq %%mm1,%%mm3\n" /* mm3 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
84
85 " punpckhwd %%mm2,%%mm1\n" /* mm1 = a*v|b*v */
86
87 " movq %%mm4,%%mm6\n" /* mm6 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
88 " punpcklwd %%mm2,%%mm3\n" /* mm3 = c*v|d*v */
89
90 " punpckhwd %%mm5,%%mm4\n" /* mm4 = e*f|f*v */
91
92 " punpcklwd %%mm5,%%mm6\n" /* mm6 = g*v|h*v */
93
94 /* pré charger le buffer dst dans mm5 */
95 " movq 8(%0),%%mm5\n" /* mm5 = dst[1] */
96
97 /* diviser par 128 */
98 " psrad $7,%%mm1\n" /* mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME */
99 " add $16,%1\n"
100
101 " psrad $7,%%mm3\n" /* mm3 = c*v/128|d*v/128 */
102
103 " psrad $7,%%mm4\n" /* mm4 = e*v/128|f*v/128 */
104
105 /* mm1 = le sample avec le volume modifié */
106 " packssdw %%mm1,%%mm3\n" /* mm3 = s(a*v|b*v|c*v|d*v) */
107
108 " psrad $7,%%mm6\n" /* mm6= g*v/128|h*v/128 */
109 " paddsw %%mm7,%%mm3\n" /* mm3 = adjust_volume(src)+dst */
110
111 /* mm4 = le sample avec le volume modifié */
112 " packssdw %%mm4,%%mm6\n" /* mm6 = s(e*v|f*v|g*v|h*v) */
113 " movq %%mm3,(%0)\n"
114
115 " paddsw %%mm5,%%mm6\n" /* mm6 = adjust_volume(src)+dst */
116
117 " movq %%mm6,8(%0)\n"
118
119 " add $16,%0\n"
120
121 " dec %%edx\n"
122
123 " jnz .mixloopS16\n"
124
125 " emms\n"
126
127 ".endS16:\n"
128 :
129 : "r" (dst), "r"(src),"m"(size),
130 "m"(volume)
131 : "eax","edx","memory"
132 );
133 } 83 }
134 84
135 85
136 86
137 /*////////////////////////////////////////////// */ 87 /*////////////////////////////////////////////// */
138 /* Mixing for 8 bit signed buffers */ 88 /* Mixing for 8 bit signed buffers */
139 /*////////////////////////////////////////////// */ 89 /*////////////////////////////////////////////// */
140 90
141 void SDL_MixAudio_MMX_S8(char* dst,char* src,unsigned int size,int volume) 91 void
92 SDL_MixAudio_MMX_S8 (char *dst, char *src, unsigned int size, int volume)
142 { 93 {
143 __asm__ __volatile__ ( 94 __asm__ __volatile__ (" movl %3,%%eax\n" /* eax = volume */
144 95 " 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 */
145 " movl %3,%%eax\n" /* eax = volume */ 96 " shr $3,%%edx\n" /* process 8 bytes per iteration = 8 samples */
146 97 " cmp $0,%%edx\n" " je .endS8\n" ".align 8\n" " .mixloopS8:\n" " pxor %%mm2,%%mm2\n" /* mm2 = 0 */
147 " movd %%eax,%%mm0\n" 98 " movq (%1),%%mm1\n" /* mm1 = a|b|c|d|e|f|g|h */
148 " movq %%mm0,%%mm1\n" 99 " movq %%mm1,%%mm3\n" /* mm3 = a|b|c|d|e|f|g|h */
149 " psllq $16,%%mm0\n" 100 /* on va faire le "sign extension" en faisant un cmp avec 0 qui retourne 1 si <0, 0 si >0 */
150 " por %%mm1,%%mm0\n" 101 " pcmpgtb %%mm1,%%mm2\n" /* mm2 = 11111111|00000000|00000000.... */
151 " psllq $16,%%mm0\n" 102 " punpckhbw %%mm2,%%mm1\n" /* mm1 = 0|a|0|b|0|c|0|d */
152 " por %%mm1,%%mm0\n" 103 " punpcklbw %%mm2,%%mm3\n" /* mm3 = 0|e|0|f|0|g|0|h */
153 " psllq $16,%%mm0\n" 104 " movq (%0),%%mm2\n" /* mm2 = destination */
154 " por %%mm1,%%mm0\n" 105 " pmullw %%mm0,%%mm1\n" /* mm1 = v*a|v*b|v*c|v*d */
155 106 " add $8,%1\n" " pmullw %%mm0,%%mm3\n" /* mm3 = v*e|v*f|v*g|v*h */
156 " movl %2,%%edx\n" /* edx = size */ 107 " psraw $7,%%mm1\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128 */
157 " shr $3,%%edx\n" /* process 8 bytes per iteration = 8 samples */ 108 " psraw $7,%%mm3\n" /* mm3 = v*e/128|v*f/128|v*g/128|v*h/128 */
158 109 " 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 */
159 " cmp $0,%%edx\n" 110 " paddsb %%mm2,%%mm3\n" /* add to destination buffer */
160 " je .endS8\n" 111 " movq %%mm3,(%0)\n" /* store back to ram */
161 112 " add $8,%0\n"
162 ".align 8\n" 113 " dec %%edx\n"
163 " .mixloopS8:\n" 114 " jnz .mixloopS8\n"
164 115 ".endS8:\n"
165 " pxor %%mm2,%%mm2\n" /* mm2 = 0 */ 116 " emms\n"::"r" (dst), "r" (src), "m" (size),
166 " movq (%1),%%mm1\n" /* mm1 = a|b|c|d|e|f|g|h */ 117 "m" (volume):"eax", "edx", "memory");
167
168 " movq %%mm1,%%mm3\n" /* mm3 = a|b|c|d|e|f|g|h */
169
170 /* on va faire le "sign extension" en faisant un cmp avec 0 qui retourne 1 si <0, 0 si >0 */
171 " pcmpgtb %%mm1,%%mm2\n" /* mm2 = 11111111|00000000|00000000.... */
172
173 " punpckhbw %%mm2,%%mm1\n" /* mm1 = 0|a|0|b|0|c|0|d */
174
175 " punpcklbw %%mm2,%%mm3\n" /* mm3 = 0|e|0|f|0|g|0|h */
176 " movq (%0),%%mm2\n" /* mm2 = destination */
177
178 " pmullw %%mm0,%%mm1\n" /* mm1 = v*a|v*b|v*c|v*d */
179 " add $8,%1\n"
180
181 " pmullw %%mm0,%%mm3\n" /* mm3 = v*e|v*f|v*g|v*h */
182 " psraw $7,%%mm1\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128 */
183
184 " psraw $7,%%mm3\n" /* mm3 = v*e/128|v*f/128|v*g/128|v*h/128 */
185
186 " 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 */
187
188 " paddsb %%mm2,%%mm3\n" /* add to destination buffer */
189
190 " movq %%mm3,(%0)\n" /* store back to ram */
191 " add $8,%0\n"
192
193 " dec %%edx\n"
194
195 " jnz .mixloopS8\n"
196
197 ".endS8:\n"
198 " emms\n"
199 :
200 : "r" (dst), "r"(src),"m"(size),
201 "m"(volume)
202 : "eax","edx","memory"
203 );
204 } 118 }
205 #endif 119 #endif
206 120 /* vi: set ts=4 sw=4 expandtab: */