diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.target/i386/980709-1.c')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.target/i386/980709-1.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.target/i386/980709-1.c b/gcc-4.9/gcc/testsuite/gcc.target/i386/980709-1.c new file mode 100644 index 000000000..595b7cbaa --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.target/i386/980709-1.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options -O2 } */ + +extern __inline__ int test_and_set_bit(int nr, volatile void * addr) +{ + int oldbit; + __asm__ __volatile__( "" + "btsl %2,%1\n\tsbbl %0,%0" + :"=r" (oldbit),"=m" (addr) + :"ir" (nr)); + return oldbit; +} +struct buffer_head { + unsigned long b_state; +}; +extern void lock_buffer(struct buffer_head * bh) +{ + while (test_and_set_bit(2 , &bh->b_state)) + __wait_on_buffer(bh); +} |