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jeremybenn |
/* Test arithmetics on bitfields. */
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extern void abort (void);
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extern void exit (int);
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unsigned int
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myrnd (void)
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{
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static unsigned int s = 1388815473;
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s *= 1103515245;
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s += 12345;
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return (s / 65536) % 2048;
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}
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#define T(S) \
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struct S s##S; \
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struct S retme##S (struct S x) \
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{ \
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return x; \
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} \
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\
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unsigned int fn1##S (unsigned int x) \
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{ \
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struct S y = s##S; \
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y.k += x; \
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y = retme##S (y); \
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return y.k; \
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} \
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\
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unsigned int fn2##S (unsigned int x) \
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{ \
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struct S y = s##S; \
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y.k += x; \
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y.k %= 15; \
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return y.k; \
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} \
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\
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unsigned int retit##S (void) \
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{ \
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return s##S.k; \
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} \
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\
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unsigned int fn3##S (unsigned int x) \
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{ \
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s##S.k += x; \
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return retit##S (); \
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} \
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\
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void test##S (void) \
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{ \
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int i; \
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unsigned int mask, v, a, r; \
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struct S x; \
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char *p = (char *) &s##S; \
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for (i = 0; i < sizeof (s##S); ++i) \
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*p++ = myrnd (); \
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if (__builtin_classify_type (s##S.l) == 8) \
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s##S.l = 5.25; \
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s##S.k = -1; \
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mask = s##S.k; \
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v = myrnd (); \
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a = myrnd (); \
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s##S.k = v; \
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x = s##S; \
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r = fn1##S (a); \
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if (x.i != s##S.i || x.j != s##S.j \
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|| x.k != s##S.k || x.l != s##S.l \
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|| ((v + a) & mask) != r) \
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abort (); \
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v = myrnd (); \
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a = myrnd (); \
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s##S.k = v; \
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x = s##S; \
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r = fn2##S (a); \
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if (x.i != s##S.i || x.j != s##S.j \
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|| x.k != s##S.k || x.l != s##S.l \
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|| ((((v + a) & mask) % 15) & mask) != r) \
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abort (); \
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v = myrnd (); \
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a = myrnd (); \
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s##S.k = v; \
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x = s##S; \
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r = fn3##S (a); \
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if (x.i != s##S.i || x.j != s##S.j \
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|| s##S.k != r || x.l != s##S.l \
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|| ((v + a) & mask) != r) \
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abort (); \
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}
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struct A { unsigned int i : 6, l : 1, j : 10, k : 15; }; T(A)
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struct B { unsigned int i : 6, j : 11, k : 15; unsigned int l; }; T(B)
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struct C { unsigned int l; unsigned int i : 6, j : 11, k : 15; }; T(C)
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struct D { unsigned long long l : 6, i : 6, j : 23, k : 29; }; T(D)
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struct E { unsigned long long l, i : 12, j : 23, k : 29; }; T(E)
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struct F { unsigned long long i : 12, j : 23, k : 29, l; }; T(F)
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struct G { unsigned int i : 12, j : 13, k : 7; unsigned long long l; }; T(G)
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struct H { unsigned int i : 12, j : 11, k : 9; unsigned long long l; }; T(H)
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struct I { unsigned short i : 1, j : 6, k : 9; unsigned long long l; }; T(I)
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struct J { unsigned short i : 1, j : 8, k : 7; unsigned short l; }; T(J)
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struct K { unsigned int k : 6, l : 1, j : 10, i : 15; }; T(K)
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struct L { unsigned int k : 6, j : 11, i : 15; unsigned int l; }; T(L)
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struct M { unsigned int l; unsigned int k : 6, j : 11, i : 15; }; T(M)
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struct N { unsigned long long l : 6, k : 6, j : 23, i : 29; }; T(N)
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struct O { unsigned long long l, k : 12, j : 23, i : 29; }; T(O)
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struct P { unsigned long long k : 12, j : 23, i : 29, l; }; T(P)
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struct Q { unsigned int k : 12, j : 13, i : 7; unsigned long long l; }; T(Q)
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struct R { unsigned int k : 12, j : 11, i : 9; unsigned long long l; }; T(R)
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struct S { unsigned short k : 1, j : 6, i : 9; unsigned long long l; }; T(S)
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struct T { unsigned short k : 1, j : 8, i : 7; unsigned short l; }; T(T)
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struct U { unsigned short j : 6, k : 1, i : 9; unsigned long long l; }; T(U)
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struct V { unsigned short j : 8, k : 1, i : 7; unsigned short l; }; T(V)
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struct W { long double l; unsigned int k : 12, j : 13, i : 7; }; T(W)
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struct X { unsigned int k : 12, j : 13, i : 7; long double l; }; T(X)
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struct Y { unsigned int k : 12, j : 11, i : 9; long double l; }; T(Y)
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struct Z { long double l; unsigned int j : 13, i : 7, k : 12; }; T(Z)
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int
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main (void)
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{
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testA ();
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testB ();
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testC ();
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testD ();
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testE ();
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testF ();
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testG ();
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testH ();
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testI ();
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testJ ();
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testK ();
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testL ();
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testM ();
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testN ();
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testO ();
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testP ();
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testQ ();
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testR ();
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testS ();
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testT ();
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testU ();
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testV ();
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testW ();
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testX ();
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testY ();
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testZ ();
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exit (0);
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}
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