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Annotation of uae/src/md-i386-gcc/support.c, revision 1.1.1.10

1.1.1.9   root        1:  /*
1.1       root        2:   * UAE - The Un*x Amiga Emulator
1.1.1.9   root        3:   *
1.1       root        4:   * Miscellaneous machine dependent support functions and definitions
                      5:   *
                      6:   * Copyright 1996 Bernd Schmidt
                      7:   */
                      8: 
                      9: 
                     10: #include "sysconfig.h"
                     11: #include "sysdeps.h"
                     12: 
                     13: #include "options.h"
                     14: #include "machdep/m68k.h"
1.1.1.3   root       15: #include "events.h"
1.1.1.5   root       16: #include "custom.h"
1.1       root       17: 
1.1.1.2   root       18: #ifndef USE_UNDERSCORE
                     19: #define LARGE_ALIGNMENT ".align 16\n"
                     20: #else
                     21: #define LARGE_ALIGNMENT ".align 4,0x90\n"
                     22: #endif
                     23: 
1.1       root       24: struct flag_struct regflags;
                     25: 
1.1.1.6   root       26: /* All the Win32 configurations handle this in od-win32/win32.c */
                     27: #ifndef _WIN32
1.1       root       28: 
1.1.1.6   root       29: #include <signal.h>
1.1.1.2   root       30: 
1.1.1.6   root       31: static volatile frame_time_t last_time, best_time;
                     32: static volatile int loops_to_go;
1.1.1.2   root       33: 
1.1.1.6   root       34: #ifndef HAVE_SETITIMER
                     35: #define TIME_UNIT 1000000
1.1.1.2   root       36: #else
1.1.1.6   root       37: #define TIME_UNIT 100000
1.1.1.2   root       38: #endif
                     39: 
1.1.1.6   root       40: static void set_alarm (void)
                     41: {
                     42: #ifndef HAVE_SETITIMER
                     43:     alarm (1);
                     44: #else
                     45:     struct itimerval t;
                     46:     t.it_value.tv_sec = 0;
                     47:     t.it_value.tv_usec = TIME_UNIT;
                     48:     t.it_interval.tv_sec = 0;
                     49:     t.it_interval.tv_usec = TIME_UNIT;
                     50:     setitimer (ITIMER_REAL, &t, NULL);
1.1.1.2   root       51: #endif
1.1       root       52: }
1.1.1.2   root       53: 
1.1.1.6   root       54: static int first_loop = 1;
1.1.1.2   root       55: 
                     56: #ifdef __cplusplus
                     57: static RETSIGTYPE alarmhandler(...)
                     58: #else
                     59: static RETSIGTYPE alarmhandler(int foo)
                     60: #endif
                     61: {
                     62:     frame_time_t bar;
                     63:     bar = read_processor_time ();
1.1.1.6   root       64:     if (! first_loop && bar - last_time < best_time)
1.1.1.2   root       65:        best_time = bar - last_time;
1.1.1.6   root       66:     first_loop = 0;
1.1.1.2   root       67:     if (--loops_to_go > 0) {
                     68:        signal (SIGALRM, alarmhandler);
                     69:        last_time = read_processor_time();
1.1.1.6   root       70:        set_alarm ();
1.1.1.8   root       71:     } else {
                     72:        alarm (0);
                     73:        signal (SIGALRM, SIG_IGN);
1.1.1.2   root       74:     }
                     75: }
                     76: 
1.1.1.4   root       77: #include <setjmp.h>
                     78: jmp_buf catch_test;
                     79: 
1.1.1.3   root       80: #ifdef __cplusplus
                     81: static RETSIGTYPE illhandler(...)
                     82: #else
                     83: static RETSIGTYPE illhandler(int foo)
                     84: #endif
                     85: {
                     86:     rpt_available = 0;
1.1.1.4   root       87:     longjmp(catch_test,1);
1.1.1.3   root       88: }
                     89: 
1.1.1.2   root       90: void machdep_init (void)
                     91: {
1.1.1.3   root       92:     rpt_available = 1;
1.1.1.7   root       93:     write_log ("Testing the RDTSC instruction ... ");
1.1.1.3   root       94:     signal (SIGILL, illhandler);
1.1.1.5   root       95:     if (setjmp (catch_test) == 0)
                     96:        read_processor_time ();
1.1.1.3   root       97:     signal (SIGILL, SIG_DFL);
1.1.1.7   root       98:     write_log ("done.\n");
1.1.1.3   root       99:     if (! rpt_available) {
1.1.1.7   root      100:        write_log ("Your processor does not support the RDTSC instruction.\n");
1.1.1.3   root      101:        return;
                    102:     }
1.1.1.7   root      103:     write_log ("Calibrating delay loop.. ");
1.1.1.3   root      104:     fflush (stderr);
1.1.1.2   root      105:     best_time = (frame_time_t)-1;
                    106:     loops_to_go = 5;
                    107:     signal (SIGALRM, alarmhandler);
                    108:     /* We want exact values... */
                    109:     sync (); sync (); sync ();
                    110:     last_time = read_processor_time();
1.1.1.6   root      111:     set_alarm ();
1.1.1.2   root      112:     while (loops_to_go != 0)
1.1.1.6   root      113:        usleep (10000);
1.1.1.7   root      114:     write_log ("ok - %.2f BogoMIPS\n",
1.1.1.6   root      115:             ((double)best_time / TIME_UNIT), best_time);
                    116:     syncbase = best_time * (1000000 / TIME_UNIT);
1.1.1.2   root      117: }
                    118: 
                    119: #endif

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