| 1 | /* |
| 2 | * Portable interface to the CPU cycle counter |
| 3 | * |
| 4 | * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine |
| 5 | * |
| 6 | * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> |
| 7 | * |
| 8 | * All rights reserved. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * |
| 14 | * * Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * * Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * * Neither the names of PolarSSL or XySSL nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 24 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 25 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 26 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 27 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 28 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
| 29 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 30 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | #include "polarssl/config.h" |
| 37 | |
| 38 | #if defined(POLARSSL_TIMING_C) |
| 39 | |
| 40 | #include "polarssl/timing.h" |
| 41 | |
| 42 | #if defined(WIN32) |
| 43 | |
| 44 | #include <windows.h> |
| 45 | #include <winbase.h> |
| 46 | |
| 47 | struct _hr_time |
| 48 | { |
| 49 | LARGE_INTEGER start; |
| 50 | }; |
| 51 | |
| 52 | #else |
| 53 | |
| 54 | #include <unistd.h> |
| 55 | #include <sys/types.h> |
| 56 | #include <sys/time.h> |
| 57 | #include <signal.h> |
| 58 | #include <time.h> |
| 59 | |
| 60 | struct _hr_time |
| 61 | { |
| 62 | struct timeval start; |
| 63 | }; |
| 64 | |
| 65 | #endif |
| 66 | |
| 67 | #if (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) |
| 68 | |
| 69 | unsigned long hardclock( void ) |
| 70 | { |
| 71 | unsigned long tsc; |
| 72 | __asm rdtsc |
| 73 | __asm mov [tsc], eax |
| 74 | return( tsc ); |
| 75 | } |
| 76 | |
| 77 | #else |
| 78 | #if defined(__GNUC__) && defined(__i386__) |
| 79 | |
| 80 | unsigned long hardclock( void ) |
| 81 | { |
| 82 | unsigned long tsc; |
| 83 | asm( "rdtsc" : "=a" (tsc) ); |
| 84 | return( tsc ); |
| 85 | } |
| 86 | |
| 87 | #else |
| 88 | #if defined(__GNUC__) && (defined(__amd64__) || defined(__x86_64__)) |
| 89 | |
| 90 | unsigned long hardclock( void ) |
| 91 | { |
| 92 | unsigned long lo, hi; |
| 93 | asm( "rdtsc" : "=a" (lo), "=d" (hi) ); |
| 94 | return( lo | (hi << 32) ); |
| 95 | } |
| 96 | |
| 97 | #else |
| 98 | #if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__)) |
| 99 | |
| 100 | unsigned long hardclock( void ) |
| 101 | { |
| 102 | unsigned long tbl, tbu0, tbu1; |
| 103 | |
| 104 | do |
| 105 | { |
| 106 | asm( "mftbu %0" : "=r" (tbu0) ); |
| 107 | asm( "mftb %0" : "=r" (tbl ) ); |
| 108 | asm( "mftbu %0" : "=r" (tbu1) ); |
| 109 | } |
| 110 | while( tbu0 != tbu1 ); |
| 111 | |
| 112 | return( tbl ); |
| 113 | } |
| 114 | |
| 115 | #else |
| 116 | #if defined(__GNUC__) && defined(__sparc__) |
| 117 | |
| 118 | unsigned long hardclock( void ) |
| 119 | { |
| 120 | unsigned long tick; |
| 121 | asm( ".byte 0x83, 0x41, 0x00, 0x00" ); |
| 122 | asm( "mov %%g1, %0" : "=r" (tick) ); |
| 123 | return( tick ); |
| 124 | } |
| 125 | |
| 126 | #else |
| 127 | #if defined(__GNUC__) && defined(__alpha__) |
| 128 | |
| 129 | unsigned long hardclock( void ) |
| 130 | { |
| 131 | unsigned long cc; |
| 132 | asm( "rpcc %0" : "=r" (cc) ); |
| 133 | return( cc & 0xFFFFFFFF ); |
| 134 | } |
| 135 | |
| 136 | #else |
| 137 | #if defined(__GNUC__) && defined(__ia64__) |
| 138 | |
| 139 | unsigned long hardclock( void ) |
| 140 | { |
| 141 | unsigned long itc; |
| 142 | asm( "mov %0 = ar.itc" : "=r" (itc) ); |
| 143 | return( itc ); |
| 144 | } |
| 145 | |
| 146 | #else |
| 147 | |
| 148 | static int hardclock_init = 0; |
| 149 | static struct timeval tv_init; |
| 150 | |
| 151 | unsigned long hardclock( void ) |
| 152 | { |
| 153 | struct timeval tv_cur; |
| 154 | |
| 155 | if( hardclock_init == 0 ) |
| 156 | { |
| 157 | gettimeofday( &tv_init, NULL ); |
| 158 | hardclock_init = 1; |
| 159 | } |
| 160 | |
| 161 | gettimeofday( &tv_cur, NULL ); |
| 162 | return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000 |
| 163 | + ( tv_cur.tv_usec - tv_init.tv_usec ) ); |
| 164 | } |
| 165 | |
| 166 | #endif /* generic */ |
| 167 | #endif /* IA-64 */ |
| 168 | #endif /* Alpha */ |
| 169 | #endif /* SPARC8 */ |
| 170 | #endif /* PowerPC */ |
| 171 | #endif /* AMD64 */ |
| 172 | #endif /* i586+ */ |
| 173 | |
| 174 | int alarmed = 0; |
| 175 | |
| 176 | #if defined(WIN32) |
| 177 | |
| 178 | unsigned long get_timer( struct hr_time *val, int reset ) |
| 179 | { |
| 180 | unsigned long delta; |
| 181 | LARGE_INTEGER offset, hfreq; |
| 182 | struct _hr_time *t = (struct _hr_time *) val; |
| 183 | |
| 184 | QueryPerformanceCounter( &offset ); |
| 185 | QueryPerformanceFrequency( &hfreq ); |
| 186 | |
| 187 | delta = (unsigned long)( ( 1000 * |
| 188 | ( offset.QuadPart - t->start.QuadPart ) ) / |
| 189 | hfreq.QuadPart ); |
| 190 | |
| 191 | if( reset ) |
| 192 | QueryPerformanceCounter( &t->start ); |
| 193 | |
| 194 | return( delta ); |
| 195 | } |
| 196 | |
| 197 | DWORD WINAPI TimerProc( LPVOID uElapse ) |
| 198 | { |
| 199 | Sleep( (DWORD) uElapse ); |
| 200 | alarmed = 1; |
| 201 | return( TRUE ); |
| 202 | } |
| 203 | |
| 204 | void set_alarm( int seconds ) |
| 205 | { |
| 206 | DWORD ThreadId; |
| 207 | |
| 208 | alarmed = 0; |
| 209 | CloseHandle( CreateThread( NULL, 0, TimerProc, |
| 210 | (LPVOID) ( seconds * 1000 ), 0, &ThreadId ) ); |
| 211 | } |
| 212 | |
| 213 | void m_sleep( int milliseconds ) |
| 214 | { |
| 215 | Sleep( milliseconds ); |
| 216 | } |
| 217 | |
| 218 | #else |
| 219 | |
| 220 | unsigned long get_timer( struct hr_time *val, int reset ) |
| 221 | { |
| 222 | unsigned long delta; |
| 223 | struct timeval offset; |
| 224 | struct _hr_time *t = (struct _hr_time *) val; |
| 225 | |
| 226 | gettimeofday( &offset, NULL ); |
| 227 | |
| 228 | delta = ( offset.tv_sec - t->start.tv_sec ) * 1000 |
| 229 | + ( offset.tv_usec - t->start.tv_usec ) / 1000; |
| 230 | |
| 231 | if( reset ) |
| 232 | { |
| 233 | t->start.tv_sec = offset.tv_sec; |
| 234 | t->start.tv_usec = offset.tv_usec; |
| 235 | } |
| 236 | |
| 237 | return( delta ); |
| 238 | } |
| 239 | |
| 240 | static void sighandler( int signum ) |
| 241 | { |
| 242 | alarmed = 1; |
| 243 | signal( signum, sighandler ); |
| 244 | } |
| 245 | |
| 246 | void set_alarm( int seconds ) |
| 247 | { |
| 248 | alarmed = 0; |
| 249 | signal( SIGALRM, sighandler ); |
| 250 | alarm( seconds ); |
| 251 | } |
| 252 | |
| 253 | void m_sleep( int milliseconds ) |
| 254 | { |
| 255 | struct timeval tv; |
| 256 | |
| 257 | tv.tv_sec = milliseconds / 1000; |
| 258 | tv.tv_usec = milliseconds * 1000; |
| 259 | |
| 260 | select( 0, NULL, NULL, NULL, &tv ); |
| 261 | } |
| 262 | |
| 263 | #endif |
| 264 | |
| 265 | #endif |
| 266 | |
