forked from OSchip/llvm-project
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
//===-- popcountti2_test.c - Test __popcountti2 ----------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file tests __popcountti2 for the compiler_rt library.
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//
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//===----------------------------------------------------------------------===//
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#include "int_lib.h"
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef CRT_HAS_128BIT
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// Returns: count of 1 bits
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COMPILER_RT_ABI si_int __popcountti2(ti_int a);
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int naive_popcount(ti_int a)
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{
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int r = 0;
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for (; a; a = (tu_int)a >> 1)
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r += a & 1;
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return r;
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}
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int test__popcountti2(ti_int a)
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{
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si_int x = __popcountti2(a);
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si_int expected = naive_popcount(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 __popcountti2(0x%.16llX%.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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char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {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__popcountti2(0))
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return 1;
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if (test__popcountti2(1))
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return 1;
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if (test__popcountti2(2))
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return 1;
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if (test__popcountti2(0xFFFFFFFFFFFFFFFDLL))
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return 1;
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if (test__popcountti2(0xFFFFFFFFFFFFFFFELL))
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return 1;
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if (test__popcountti2(0xFFFFFFFFFFFFFFFFLL))
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return 1;
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if (test__popcountti2(make_ti(0xFFFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFDLL)))
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return 1;
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if (test__popcountti2(make_ti(0xFFFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFELL)))
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return 1;
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if (test__popcountti2(make_ti(0xFFFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
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return 1;
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int i;
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for (i = 0; i < 10000; ++i)
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if (test__popcountti2(((ti_int)rand() << 96) | ((ti_int)rand() << 64) |
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((ti_int)rand() << 32) | rand()))
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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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