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58 lines
1.4 KiB
58 lines
1.4 KiB
7 months ago
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// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_ctzdi2
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#include "int_lib.h"
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#include <stdio.h>
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// Returns: the number of trailing 0-bits
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// Precondition: a != 0
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COMPILER_RT_ABI int __ctzdi2(di_int a);
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int test__ctzdi2(di_int a, int expected)
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{
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int x = __ctzdi2(a);
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if (x != expected)
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printf("error in __ctzdi2(0x%llX) = %d, expected %d\n", a, x, expected);
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return x != expected;
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}
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char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
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int main()
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{
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// if (test__ctzdi2(0x00000000, N)) // undefined
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// return 1;
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if (test__ctzdi2(0x00000001, 0))
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return 1;
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if (test__ctzdi2(0x00000002, 1))
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return 1;
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if (test__ctzdi2(0x00000003, 0))
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return 1;
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if (test__ctzdi2(0x00000004, 2))
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return 1;
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if (test__ctzdi2(0x00000005, 0))
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return 1;
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if (test__ctzdi2(0x0000000A, 1))
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return 1;
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if (test__ctzdi2(0x10000000, 28))
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return 1;
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if (test__ctzdi2(0x20000000, 29))
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return 1;
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if (test__ctzdi2(0x60000000, 29))
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return 1;
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if (test__ctzdi2(0x80000000uLL, 31))
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return 1;
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if (test__ctzdi2(0x0000050000000000uLL, 40))
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return 1;
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if (test__ctzdi2(0x0200080000000000uLL, 43))
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return 1;
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if (test__ctzdi2(0x7200000000000000uLL, 57))
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return 1;
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if (test__ctzdi2(0x8000000000000000uLL, 63))
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return 1;
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return 0;
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}
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