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/* Test program to test bit field operations */
/* For non-ANSI compilers, use plain ints for the signed bit fields. However,
whether they actually end up signed or not is implementation defined, so
this may cause some tests to fail. But at least we can still compile
the test program and run the tests... */
#ifndef __STDC__
#define signed /**/
#endif
struct fields
{
unsigned char uc ;
signed int s1 : 1;
unsigned int u1 : 1;
signed int s2 : 2;
unsigned int u2 : 2;
signed int s3 : 3;
unsigned int u3 : 3;
signed int s9 : 9;
unsigned int u9 : 9;
signed char sc ;
} flags;
void break1 ()
{
}
void break2 ()
{
}
void break3 ()
{
}
void break4 ()
{
}
void break5 ()
{
}
void break6 ()
{
}
void break7 ()
{
}
void break8 ()
{
}
void break9 ()
{
}
void break10 ()
{
}
/* This is used by bitfields.exp to determine if the target understands
signed bitfields. */
int i;
int main ()
{
/* For each member, set that member to 1, allow gdb to verify that the
member (and only that member) is 1, and then reset it back to 0. */
#ifdef usestubs
set_debug_traps();
breakpoint();
#endif
flags.uc = 1;
break1 ();
flags.uc = 0;
flags.s1 = 1;
break1 ();
flags.s1 = 0;
flags.u1 = 1;
break1 ();
flags.u1 = 0;
flags.s2 = 1;
break1 ();
flags.s2 = 0;
flags.u2 = 1;
break1 ();
flags.u2 = 0;
flags.s3 = 1;
break1 ();
flags.s3 = 0;
flags.u3 = 1;
break1 ();
flags.u3 = 0;
flags.s9 = 1;
break1 ();
flags.s9 = 0;
flags.u9 = 1;
break1 ();
flags.u9 = 0;
flags.sc = 1;
break1 ();
flags.sc = 0;
/* Fill alternating fields with all 1's and verify that none of the bits
"bleed over" to the other fields. */
flags.uc = 0xFF;
flags.u1 = 0x1;
flags.u2 = 0x3;
flags.u3 = 0x7;
flags.u9 = 0x1FF;
break2 ();
flags.uc = 0;
flags.u1 = 0;
flags.u2 = 0;
flags.u3 = 0;
flags.u9 = 0;
flags.s1 = 0x1;
flags.s2 = 0x3;
flags.s3 = 0x7;
flags.s9 = 0x1FF;
flags.sc = 0xFF;
break2 ();
flags.s1 = 0;
flags.s2 = 0;
flags.s3 = 0;
flags.s9 = 0;
flags.sc = 0;
/* Fill the unsigned fields with the maximum positive value and verify
that the values are printed correctly. */
/* Maximum positive values */
flags.u1 = 0x1;
flags.u2 = 0x3;
flags.u3 = 0x7;
flags.u9 = 0x1FF;
break3 ();
flags.u1 = 0;
flags.u2 = 0;
flags.u3 = 0;
flags.u9 = 0;
/* Fill the signed fields with the maximum positive value, then the maximally
negative value, then -1, and verify in each case that the values are
printed correctly. */
/* Maximum positive values */
flags.s1 = 0x0;
flags.s2 = 0x1;
flags.s3 = 0x3;
flags.s9 = 0xFF;
break4 ();
/* Maximally negative values */
flags.s1 = 0x1;
flags.s2 = 0x2;
flags.s3 = 0x4;
flags.s9 = 0x100;
/* Extract bitfield value so that bitfield.exp can check if the target
understands signed bitfields. */
i = flags.s9;
break4 ();
/* -1 */
flags.s1 = 0x1;
flags.s2 = 0x3;
flags.s3 = 0x7;
flags.s9 = 0x1FF;
break4 ();
flags.s1 = 0;
flags.s2 = 0;
flags.s3 = 0;
flags.s9 = 0;
return 0;
}
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