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Annotation of uae/src/md-amiga/support.c, revision 1.1.1.1

1.1       root        1:  /* 
                      2:   * UAE - The Un*x Amiga Emulator
                      3:   * 
                      4:   * Miscellaneous machine dependent support functions and definitions
                      5:   *
                      6:   * Copyright 1996 Samuel Devulder
                      7:   */
                      8: 
                      9: #include "sysconfig.h"
                     10: #include "sysdeps.h"
                     11: 
                     12: #include "config.h"
                     13: #include "options.h"
                     14: #include "machdep/m68k.h"
                     15: 
                     16: struct flag_struct regflags;
                     17: 
                     18: /* Not used anyway */
                     19: int fast_memcmp(const void *foo, const void *bar, int len)
                     20: {
                     21:     return memcmp(foo, bar, len);
                     22: }
                     23: 
                     24: int memcmpy(void *foo, const void *bar, int len)
                     25: {
                     26:     /*    if(((int)foo)&1 || ((int)foo)&1) goto notaligned;
                     27:      * 
                     28:      */
                     29:     while((((short)len) -= 4) >= 0)
                     30:        if(*((long*)foo)++ != *((long*)bar)++)
                     31:            goto diff4;
                     32:     ((short)len) += 4;
                     33:     
                     34:     notaligned:
                     35:     while(((short)len)--) {  /* ((short)len)-- will produce dbra => great ! */
                     36:        if (*((char*)foo)++ != *((char*)bar)++) { ((char*)foo)[-1] = ((char*)bar)[-1];
                     37:            goto diff1;
                     38:        }
                     39:     }
                     40:     return 0;
                     41:     
                     42:     diff4:
                     43:     ((long*)foo)[-1] = ((long*)bar)[-1];
                     44:     while((((short)len)-=4) >= 0)
                     45:        *((long*)foo)++ = *((long*)bar)++;
                     46:     ((short)len) += 4;
                     47:     
                     48:     diff1:
                     49:     while(((short)len)--)
                     50:        *((char*)foo)++ = *((char*)bar)++;
                     51:     return 1;
                     52:     
                     53: }

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