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Diffstat (limited to 'test/Unit/clzti2_test.c')
-rw-r--r-- | test/Unit/clzti2_test.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/test/Unit/clzti2_test.c b/test/Unit/clzti2_test.c new file mode 100644 index 000000000000..e1229f1c4ad0 --- /dev/null +++ b/test/Unit/clzti2_test.c @@ -0,0 +1,88 @@ +//===-- clzti2_test.c - Test __clzti2 -------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __clzti2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#if __x86_64 + +#include "int_lib.h" +#include <stdio.h> + +// Returns: the number of leading 0-bits + +// Precondition: a != 0 + +si_int __clzti2(ti_int a); + +int test__clzti2(ti_int a, si_int expected) +{ + si_int x = __clzti2(a); + if (x != expected) + { + twords at; + at.all = a; + printf("error in __clzti2(0x%llX%.16llX) = %d, expected %d\n", + at.s.high, at.s.low, x, expected); + } + return x != expected; +} + +char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; + +#endif + +int main() +{ +#if __x86_64 + const int N = (int)(sizeof(ti_int) * CHAR_BIT); + + if (test__clzti2(0x00000001, N-1)) + return 1; + if (test__clzti2(0x00000002, N-2)) + return 1; + if (test__clzti2(0x00000003, N-2)) + return 1; + if (test__clzti2(0x00000004, N-3)) + return 1; + if (test__clzti2(0x00000005, N-3)) + return 1; + if (test__clzti2(0x0000000A, N-4)) + return 1; + if (test__clzti2(0x1000000A, N*3/4+3)) + return 1; + if (test__clzti2(0x2000000A, N*3/4+2)) + return 1; + if (test__clzti2(0x6000000A, N*3/4+1)) + return 1; + if (test__clzti2(0x8000000AuLL, N*3/4)) + return 1; + if (test__clzti2(0x000005008000000AuLL, 85)) + return 1; + if (test__clzti2(0x020005008000000AuLL, 70)) + return 1; + if (test__clzti2(0x720005008000000AuLL, 65)) + return 1; + if (test__clzti2(0x820005008000000AuLL, 64)) + return 1; + + if (test__clzti2(make_ti(0x0000000080000000LL, 0x8000000800000000LL), 32)) + return 1; + if (test__clzti2(make_ti(0x0000000100000000LL, 0x8000000800000000LL), 31)) + return 1; + if (test__clzti2(make_ti(0x1000000100000000LL, 0x8000000800000000LL), 3)) + return 1; + if (test__clzti2(make_ti(0x7000000100000000LL, 0x8000000800000000LL), 1)) + return 1; + if (test__clzti2(make_ti(0x8000000100000000LL, 0x8000000800000000LL), 0)) + return 1; +#endif + return 0; +} |