derek.holloway
7502bf64a4
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75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_ffsti2
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// REQUIRES: int128
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#include "int_lib.h"
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#include <stdio.h>
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#ifdef CRT_HAS_128BIT
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// Returns: the index of the least significant 1-bit in a, or
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// the value zero if a is zero. The least significant bit is index one.
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COMPILER_RT_ABI int __ffsti2(ti_int a);
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int test__ffsti2(ti_int a, int expected)
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{
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int x = __ffsti2(a);
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if (x != expected)
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{
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twords at;
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at.all = a;
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printf("error in __ffsti2(0x%llX%.16llX) = %d, expected %d\n",
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at.s.high, at.s.low, x, expected);
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}
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return x != expected;
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}
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char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
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#endif
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int main()
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{
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#ifdef CRT_HAS_128BIT
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if (test__ffsti2(0x00000000, 0))
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return 1;
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if (test__ffsti2(0x00000001, 1))
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return 1;
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if (test__ffsti2(0x00000002, 2))
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return 1;
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if (test__ffsti2(0x00000003, 1))
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return 1;
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if (test__ffsti2(0x00000004, 3))
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return 1;
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if (test__ffsti2(0x00000005, 1))
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return 1;
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if (test__ffsti2(0x0000000A, 2))
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return 1;
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if (test__ffsti2(0x10000000, 29))
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return 1;
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if (test__ffsti2(0x20000000, 30))
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return 1;
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if (test__ffsti2(0x60000000, 30))
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return 1;
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if (test__ffsti2(0x80000000uLL, 32))
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return 1;
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if (test__ffsti2(0x0000050000000000uLL, 41))
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return 1;
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if (test__ffsti2(0x0200080000000000uLL, 44))
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return 1;
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if (test__ffsti2(0x7200000000000000uLL, 58))
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return 1;
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if (test__ffsti2(0x8000000000000000uLL, 64))
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return 1;
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if (test__ffsti2(make_ti(0x8000000800000000uLL, 0), 100))
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return 1;
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if (test__ffsti2(make_ti(0x8000000000000000uLL, 0), 128))
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return 1;
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#else
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printf("skipped\n");
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#endif
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return 0;
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}
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