gcc/testsuite/gcc.dg/asmreg-1.c

   1 /* { dg-do compile { target cris-*-* } } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-final { scan-assembler "\\\.ifnc \\\$r9-\\\$r10-\\\$r11-\\\$r12" } } */
   4
   5 /* Sanity check for asm register operands in syscall failed for
   6    cris-axis-linux-gnu due to regmove bug.
   7    Hans-Peter Nilsson <hp@axis.com>.  */
   8
   9 extern void lseek64 (int, long long, int);
  10 extern int *__errno_location (void);
  11 struct dirent64
  12 {
  13   long long d_off;
  14   unsigned short int d_reclen;
  15   char d_name[256];
  16 };
  17 struct kernel_dirent64
  18 {
  19   long long d_off;
  20   unsigned short d_reclen;
  21   char d_name[256];
  22 };
  23
  24 static inline int __attribute__ ((__always_inline__))
  25 __syscall_getdents64 (int fd, char * dirp, unsigned count)
  26 {
  27   register unsigned long __sys_res asm ("r10");
  28   register unsigned long __r10 __asm__ ("r10") = (unsigned long) fd;
  29   register unsigned long __r11 __asm__ ("r11") = (unsigned long) dirp;
  30   register unsigned long __r12 __asm__ ("r12") = (unsigned long) count;
  31   register unsigned long __callno asm ("r9") = (220);
  32   asm volatile (".ifnc %1-%0-%3-%4,$r9-$r10-$r11-$r12\n\t"
  33                 ".err\n\t"
  34                 ".endif\n\t"
  35                 "break 13"
  36                 : "=r" (__sys_res)
  37                 : "r" (__callno), "0" (__r10), "r" (__r11), "r" (__r12)
  38                 : "memory");
  39   if (__sys_res >= (unsigned long) -4096)
  40     {
  41       (*__errno_location ()) = - __sys_res;
  42       __sys_res = -1;
  43     }
  44   return __sys_res;
  45 }
  46
  47 int
  48 __getdents64 (int fd, char *buf, unsigned nbytes)
  49 {
  50   struct dirent64 *dp;
  51   long long last_offset = -1;
  52   int retval;
  53   struct kernel_dirent64 *skdp, *kdp;
  54   dp = (struct dirent64 *) buf;
  55   skdp = kdp = __builtin_alloca (nbytes);
  56   retval = __syscall_getdents64(fd, (char *)kdp, nbytes);
  57   if (retval == -1)
  58     return -1;
  59   while ((char *) kdp < (char *) skdp + retval)
  60     {
  61       if ((char *) dp > buf + nbytes)
  62         {
  63           lseek64(fd, last_offset, 0);
  64           break;
  65         }
  66       last_offset = kdp->d_off;
  67       __builtin_memcpy (dp->d_name, kdp->d_name, kdp->d_reclen - 10);
  68       dp = (struct dirent64 *) ((char *) dp + sizeof (*dp));
  69       kdp = (struct kernel_dirent64 *) (((char *) kdp) + kdp->d_reclen);
  70     }
  71
  72   return (char *) dp - buf;
  73 }