172 lines
2.7 KiB
C
172 lines
2.7 KiB
C
/* Test program to test bit field operations on bit fields of large
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integer types. */
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/* This file is expected to fail to compile if the type long long int
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is not supported, but in that case it is irrelevant. */
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#include <stdlib.h>
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#include <string.h>
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#if !defined(__STDC__) && !defined(__cplusplus)
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#define signed /**/
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#endif
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struct fields
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{
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unsigned long long u1 : 15;
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unsigned long long u2 : 33;
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unsigned long long u3 : 16;
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signed long long s1 : 15;
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signed long long s2 : 33;
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signed long long s3 : 16;
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} flags;
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void break1 ()
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{
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}
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void break2 ()
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{
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}
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void break3 ()
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{
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}
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void break4 ()
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{
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}
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void break5 ()
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{
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}
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void break6 ()
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{
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}
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void break7 ()
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{
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}
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void break8 ()
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{
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}
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void break9 ()
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{
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}
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void break10 ()
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{
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}
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/* This is used by bitfields.exp to determine if the target understands
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signed bitfields. */
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int i;
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void tester ()
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{
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memset ((char *) &flags, 0, sizeof (flags));
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/* For each member, set that member to 1, allow gdb to verify that the
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member (and only that member) is 1, and then reset it back to 0. */
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flags.s1 = 1;
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break1 ();
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flags.s1 = 0;
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flags.u1 = 1;
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break1 ();
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flags.u1 = 0;
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flags.s2 = 1;
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break1 ();
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flags.s2 = 0;
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flags.u2 = 1;
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break1 ();
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flags.u2 = 0;
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flags.s3 = 1;
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break1 ();
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flags.s3 = 0;
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flags.u3 = 1;
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break1 ();
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flags.u3 = 0;
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/* Fill alternating fields with all 1's and verify that none of the bits
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"bleed over" to the other fields. */
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flags.u1 = 0x7FFF;
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flags.u3 = 0xFFFF;
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flags.s2 = -1LL;
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break2 ();
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flags.u1 = 0;
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flags.u3 = 0;
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flags.s2 = 0;
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flags.u2 = 0x1FFFFFFFFLL;
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flags.s1 = -1;
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flags.s3 = -1;
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break2 ();
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flags.u2 = 0;
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flags.s1 = 0;
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flags.s3 = 0;
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/* Fill the unsigned fields with the maximum positive value and verify
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that the values are printed correctly. */
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flags.u1 = 0x7FFF;
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flags.u2 = 0x1FFFFFFFFLL;
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flags.u3 = 0xFFFF;
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break3 ();
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flags.u1 = 0;
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flags.u2 = 0;
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flags.u3 = 0;
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/* Fill the signed fields with the maximum positive value, then the maximally
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negative value, then -1, and verify in each case that the values are
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printed correctly. */
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/* Maximum positive values */
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flags.s1 = 0x3FFF;
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flags.s2 = 0xFFFFFFFFLL;
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flags.s3 = 0x7FFF;
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break4 ();
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/* Maximally negative values */
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flags.s1 = -0x4000;
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flags.s2 = -0x100000000LL;
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flags.s3 = -0x8000;
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/* Extract bitfield value so that bitfield.exp can check if the target
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understands signed bitfields. */
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i = flags.s3;
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break4 ();
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/* -1 */
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flags.s1 = -1;
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flags.s2 = -1;
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flags.s3 = -1;
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break4 ();
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flags.s1 = 0;
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flags.s2 = 0;
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flags.s3 = 0;
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break5 ();
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}
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int main ()
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{
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int i;
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#ifdef usestubs
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set_debug_traps();
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breakpoint();
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#endif
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for (i = 0; i < 5; i += 1)
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tester ();
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return 0;
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}
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