1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/celt/arm/armcpu.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,174 @@
1.4 +/* Copyright (c) 2010 Xiph.Org Foundation
1.5 + * Copyright (c) 2013 Parrot */
1.6 +/*
1.7 + Redistribution and use in source and binary forms, with or without
1.8 + modification, are permitted provided that the following conditions
1.9 + are met:
1.10 +
1.11 + - Redistributions of source code must retain the above copyright
1.12 + notice, this list of conditions and the following disclaimer.
1.13 +
1.14 + - Redistributions in binary form must reproduce the above copyright
1.15 + notice, this list of conditions and the following disclaimer in the
1.16 + documentation and/or other materials provided with the distribution.
1.17 +
1.18 + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.19 + ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.20 + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.21 + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
1.22 + OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.23 + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.24 + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.25 + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.26 + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.27 + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.28 + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.29 +*/
1.30 +
1.31 +/* Original code from libtheora modified to suit to Opus */
1.32 +
1.33 +#ifdef HAVE_CONFIG_H
1.34 +#include "config.h"
1.35 +#endif
1.36 +
1.37 +#ifdef OPUS_HAVE_RTCD
1.38 +
1.39 +#include "armcpu.h"
1.40 +#include "cpu_support.h"
1.41 +#include "os_support.h"
1.42 +#include "opus_types.h"
1.43 +
1.44 +#define OPUS_CPU_ARM_V4 (1)
1.45 +#define OPUS_CPU_ARM_EDSP (1<<1)
1.46 +#define OPUS_CPU_ARM_MEDIA (1<<2)
1.47 +#define OPUS_CPU_ARM_NEON (1<<3)
1.48 +
1.49 +#if defined(_MSC_VER)
1.50 +/*For GetExceptionCode() and EXCEPTION_ILLEGAL_INSTRUCTION.*/
1.51 +# define WIN32_LEAN_AND_MEAN
1.52 +# define WIN32_EXTRA_LEAN
1.53 +# include <windows.h>
1.54 +
1.55 +static OPUS_INLINE opus_uint32 opus_cpu_capabilities(void){
1.56 + opus_uint32 flags;
1.57 + flags=0;
1.58 + /* MSVC has no OPUS_INLINE __asm support for ARM, but it does let you __emit
1.59 + * instructions via their assembled hex code.
1.60 + * All of these instructions should be essentially nops. */
1.61 +# if defined(OPUS_ARM_MAY_HAVE_EDSP)
1.62 + __try{
1.63 + /*PLD [r13]*/
1.64 + __emit(0xF5DDF000);
1.65 + flags|=OPUS_CPU_ARM_EDSP;
1.66 + }
1.67 + __except(GetExceptionCode()==EXCEPTION_ILLEGAL_INSTRUCTION){
1.68 + /*Ignore exception.*/
1.69 + }
1.70 +# if defined(OPUS_ARM_MAY_HAVE_MEDIA)
1.71 + __try{
1.72 + /*SHADD8 r3,r3,r3*/
1.73 + __emit(0xE6333F93);
1.74 + flags|=OPUS_CPU_ARM_MEDIA;
1.75 + }
1.76 + __except(GetExceptionCode()==EXCEPTION_ILLEGAL_INSTRUCTION){
1.77 + /*Ignore exception.*/
1.78 + }
1.79 +# if defined(OPUS_ARM_MAY_HAVE_NEON)
1.80 + __try{
1.81 + /*VORR q0,q0,q0*/
1.82 + __emit(0xF2200150);
1.83 + flags|=OPUS_CPU_ARM_NEON;
1.84 + }
1.85 + __except(GetExceptionCode()==EXCEPTION_ILLEGAL_INSTRUCTION){
1.86 + /*Ignore exception.*/
1.87 + }
1.88 +# endif
1.89 +# endif
1.90 +# endif
1.91 + return flags;
1.92 +}
1.93 +
1.94 +#elif defined(__linux__)
1.95 +/* Linux based */
1.96 +opus_uint32 opus_cpu_capabilities(void)
1.97 +{
1.98 + opus_uint32 flags = 0;
1.99 + FILE *cpuinfo;
1.100 +
1.101 + /* Reading /proc/self/auxv would be easier, but that doesn't work reliably on
1.102 + * Android */
1.103 + cpuinfo = fopen("/proc/cpuinfo", "r");
1.104 +
1.105 + if(cpuinfo != NULL)
1.106 + {
1.107 + /* 512 should be enough for anybody (it's even enough for all the flags that
1.108 + * x86 has accumulated... so far). */
1.109 + char buf[512];
1.110 +
1.111 + while(fgets(buf, 512, cpuinfo) != NULL)
1.112 + {
1.113 +# if defined(OPUS_ARM_MAY_HAVE_EDSP) || defined(OPUS_ARM_MAY_HAVE_NEON)
1.114 + /* Search for edsp and neon flag */
1.115 + if(memcmp(buf, "Features", 8) == 0)
1.116 + {
1.117 + char *p;
1.118 +# if defined(OPUS_ARM_MAY_HAVE_EDSP)
1.119 + p = strstr(buf, " edsp");
1.120 + if(p != NULL && (p[5] == ' ' || p[5] == '\n'))
1.121 + flags |= OPUS_CPU_ARM_EDSP;
1.122 +# endif
1.123 +
1.124 +# if defined(OPUS_ARM_MAY_HAVE_NEON)
1.125 + p = strstr(buf, " neon");
1.126 + if(p != NULL && (p[5] == ' ' || p[5] == '\n'))
1.127 + flags |= OPUS_CPU_ARM_NEON;
1.128 +# endif
1.129 + }
1.130 +# endif
1.131 +
1.132 +# if defined(OPUS_ARM_MAY_HAVE_MEDIA)
1.133 + /* Search for media capabilities (>= ARMv6) */
1.134 + if(memcmp(buf, "CPU architecture:", 17) == 0)
1.135 + {
1.136 + int version;
1.137 + version = atoi(buf+17);
1.138 +
1.139 + if(version >= 6)
1.140 + flags |= OPUS_CPU_ARM_MEDIA;
1.141 + }
1.142 +# endif
1.143 + }
1.144 +
1.145 + fclose(cpuinfo);
1.146 + }
1.147 + return flags;
1.148 +}
1.149 +#else
1.150 +/* The feature registers which can tell us what the processor supports are
1.151 + * accessible in priveleged modes only, so we can't have a general user-space
1.152 + * detection method like on x86.*/
1.153 +# error "Configured to use ARM asm but no CPU detection method available for " \
1.154 + "your platform. Reconfigure with --disable-rtcd (or send patches)."
1.155 +#endif
1.156 +
1.157 +int opus_select_arch(void)
1.158 +{
1.159 + opus_uint32 flags = opus_cpu_capabilities();
1.160 + int arch = 0;
1.161 +
1.162 + if(!(flags & OPUS_CPU_ARM_EDSP))
1.163 + return arch;
1.164 + arch++;
1.165 +
1.166 + if(!(flags & OPUS_CPU_ARM_MEDIA))
1.167 + return arch;
1.168 + arch++;
1.169 +
1.170 + if(!(flags & OPUS_CPU_ARM_NEON))
1.171 + return arch;
1.172 + arch++;
1.173 +
1.174 + return arch;
1.175 +}
1.176 +
1.177 +#endif
