47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_ffssi2
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#include "int_lib.h"
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#include <stdio.h>
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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 __ffssi2(si_int a);
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int test__ffssi2(si_int a, int expected)
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{
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int x = __ffssi2(a);
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if (x != expected)
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printf("error in __ffssi2(0x%X) = %d, expected %d\n", a, x, expected);
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return x != expected;
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}
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int main()
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{
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if (test__ffssi2(0x00000000, 0))
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return 1;
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if (test__ffssi2(0x00000001, 1))
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return 1;
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if (test__ffssi2(0x00000002, 2))
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return 1;
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if (test__ffssi2(0x00000003, 1))
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return 1;
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if (test__ffssi2(0x00000004, 3))
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return 1;
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if (test__ffssi2(0x00000005, 1))
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return 1;
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if (test__ffssi2(0x0000000A, 2))
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return 1;
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if (test__ffssi2(0x10000000, 29))
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return 1;
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if (test__ffssi2(0x20000000, 30))
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return 1;
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if (test__ffssi2(0x60000000, 30))
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return 1;
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if (test__ffssi2(0x80000000u, 32))
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return 1;
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return 0;
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}
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