Subversion Repositories openrisc_2011-10-31

/* { dg-do compile } */

/* { dg-require-effective-target ilp32 } */

/* { dg-options "-O" } */

typedef unsigned char u8;

struct __large_struct { unsigned long buf[100]; };

static inline __attribute__((always_inline)) unsigned long

__copy_from_user_inatomic(void *to, const void *from, unsigned long n)

{

  unsigned long ret = 0;

  asm volatile("1:      mov""b"" %2,%""b""1\n" "2:\n"

               ".section .fixup,\"ax\"\n"

               "3:      mov %3,%0\n"

               "        xor""b"" %""b""1,%""b""1\n"

               "        jmp 2b\n"

               ".previous\n"

               " .section __ex_table,\"a\"\n"

               " " ".balign 4" " " "\n"

               " " ".long" " " "1b" "," "3b" "\n"

               " .previous\n"

               : "=r" (ret), "=q"(*(u8 *)to)

               : "m" ((*(struct __large_struct *)(from))), "i" (1), "0" (ret));

  return ret;

}

void romchecksum(const unsigned char *rom, unsigned char c)

{

  unsigned char sum;

  for (sum = 0;

       !__copy_from_user_inatomic(&(c), ( typeof(c) *)(rom++), sizeof(c));)

    sum += c;

}