1 /* 2 * optimized mixing code for i386 3 */ 4 5 #define MIX_AREAS_16 mix_areas_16 6 #define MIX_AREAS_16_MMX mix_areas_16_mmx 7 #define MIX_AREAS_32 mix_areas_32 8 #define MIX_AREAS_24 mix_areas_24 9 #define MIX_AREAS_24_CMOV mix_areas_24_cmov 10 #define LOCK_PREFIX "" 11 #define XADD "addl" 12 #define XSUB "subl" 13 #include "pcm_dmix_i386.h" 14 #undef MIX_AREAS_16 15 #undef MIX_AREAS_16_MMX 16 #undef MIX_AREAS_32 17 #undef MIX_AREAS_24 18 #undef MIX_AREAS_24_CMOV 19 #undef LOCK_PREFIX 20 #undef XADD 21 #undef XSUB 22 23 #define MIX_AREAS_16 remix_areas_16 24 #define MIX_AREAS_16_MMX remix_areas_16_mmx 25 #define MIX_AREAS_32 remix_areas_32 26 #define MIX_AREAS_24 remix_areas_24 27 #define MIX_AREAS_24_CMOV remix_areas_24_cmov 28 #define LOCK_PREFIX "" 29 #define XADD "subl" 30 #define XSUB "addl" 31 #include "pcm_dmix_i386.h" 32 #undef MIX_AREAS_16 33 #undef MIX_AREAS_16_MMX 34 #undef MIX_AREAS_32 35 #undef MIX_AREAS_24 36 #undef MIX_AREAS_24_CMOV 37 #undef LOCK_PREFIX 38 #undef XADD 39 #undef XSUB 40 41 #define MIX_AREAS_16 mix_areas_16_smp 42 #define MIX_AREAS_16_MMX mix_areas_16_smp_mmx 43 #define MIX_AREAS_32 mix_areas_32_smp 44 #define MIX_AREAS_24 mix_areas_24_smp 45 #define MIX_AREAS_24_CMOV mix_areas_24_smp_cmov 46 #define LOCK_PREFIX "lock ; " 47 #define XADD "addl" 48 #define XSUB "subl" 49 #include "pcm_dmix_i386.h" 50 #undef MIX_AREAS_16 51 #undef MIX_AREAS_16_MMX 52 #undef MIX_AREAS_32 53 #undef MIX_AREAS_24 54 #undef MIX_AREAS_24_CMOV 55 #undef LOCK_PREFIX 56 #undef XADD 57 #undef XSUB 58 59 #define MIX_AREAS_16 remix_areas_16_smp 60 #define MIX_AREAS_16_MMX remix_areas_16_smp_mmx 61 #define MIX_AREAS_32 remix_areas_32_smp 62 #define MIX_AREAS_24 remix_areas_24_smp 63 #define MIX_AREAS_24_CMOV remix_areas_24_smp_cmov 64 #define LOCK_PREFIX "lock ; " 65 #define XADD "subl" 66 #define XSUB "addl" 67 #include "pcm_dmix_i386.h" 68 #undef MIX_AREAS_16 69 #undef MIX_AREAS_16_MMX 70 #undef MIX_AREAS_32 71 #undef MIX_AREAS_24 72 #undef MIX_AREAS_24_CMOV 73 #undef LOCK_PREFIX 74 #undef XADD 75 #undef XSUB 76 77 #define i386_dmix_supported_format \ 78 ((1ULL << SND_PCM_FORMAT_S16_LE) |\ 79 (1ULL << SND_PCM_FORMAT_S32_LE) |\ 80 (1ULL << SND_PCM_FORMAT_S24_3LE)) 81 82 #define dmix_supported_format \ 83 (i386_dmix_supported_format | generic_dmix_supported_format) 84 85 static void mix_select_callbacks(snd_pcm_direct_t *dmix) 86 { 87 static int smp = 0, mmx = 0, cmov = 0; 88 89 if (!((1ULL<< dmix->shmptr->s.format) & i386_dmix_supported_format)) { 90 generic_mix_select_callbacks(dmix); 91 return; 92 } 93 94 if (!smp) { 95 FILE *in; 96 char line[255]; 97 98 /* try to determine the capabilities of the CPU */ 99 in = fopen("/proc/cpuinfo", "r"); 100 if (in) { 101 while (!feof(in)) { 102 fgets(line, sizeof(line), in); 103 if (!strncmp(line, "processor", 9)) 104 smp++; 105 else if (!strncmp(line, "flags", 5)) { 106 if (strstr(line, " mmx")) 107 mmx = 1; 108 if (strstr(line, " cmov")) 109 cmov = 1; 110 } 111 } 112 fclose(in); 113 } 114 } 115 116 if (mmx) { 117 dmix->u.dmix.mix_areas_16 = smp > 1 ? mix_areas_16_smp_mmx : mix_areas_16_mmx; 118 dmix->u.dmix.remix_areas_16 = smp > 1 ? remix_areas_16_smp_mmx : remix_areas_16_mmx; 119 } else { 120 dmix->u.dmix.mix_areas_16 = smp > 1 ? mix_areas_16_smp : mix_areas_16; 121 dmix->u.dmix.remix_areas_16 = smp > 1 ? remix_areas_16_smp : remix_areas_16; 122 } 123 dmix->u.dmix.mix_areas_32 = smp > 1 ? mix_areas_32_smp : mix_areas_32; 124 dmix->u.dmix.remix_areas_32 = smp > 1 ? remix_areas_32_smp : remix_areas_32; 125 if (cmov) { 126 dmix->u.dmix.mix_areas_24 = smp > 1 ? mix_areas_24_smp_cmov : mix_areas_24_cmov; 127 dmix->u.dmix.remix_areas_24 = smp > 1 ? remix_areas_24_smp_cmov : remix_areas_24_cmov; 128 } else { 129 dmix->u.dmix.mix_areas_24 = smp > 1 ? mix_areas_24_smp: mix_areas_24; 130 dmix->u.dmix.remix_areas_24 = smp > 1 ? remix_areas_24_smp: remix_areas_24; 131 } 132 } 133
