forked from OSchip/llvm-project
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
//===-- clzti2_test.c - Test __clzti2 -------------------------------------===//
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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 __clzti2 for the compiler_rt library.
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//
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//===----------------------------------------------------------------------===//
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#if __x86_64
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#include "int_lib.h"
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#include <stdio.h>
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// Returns: the number of leading 0-bits
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// Precondition: a != 0
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si_int __clzti2(ti_int a);
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int test__clzti2(ti_int a, si_int expected)
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{
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si_int x = __clzti2(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 __clzti2(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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#if __x86_64
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const int N = (int)(sizeof(ti_int) * CHAR_BIT);
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if (test__clzti2(0x00000001, N-1))
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return 1;
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if (test__clzti2(0x00000002, N-2))
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return 1;
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if (test__clzti2(0x00000003, N-2))
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return 1;
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if (test__clzti2(0x00000004, N-3))
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return 1;
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if (test__clzti2(0x00000005, N-3))
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return 1;
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if (test__clzti2(0x0000000A, N-4))
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return 1;
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if (test__clzti2(0x1000000A, N*3/4+3))
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return 1;
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if (test__clzti2(0x2000000A, N*3/4+2))
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return 1;
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if (test__clzti2(0x6000000A, N*3/4+1))
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return 1;
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if (test__clzti2(0x8000000AuLL, N*3/4))
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return 1;
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if (test__clzti2(0x000005008000000AuLL, 85))
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return 1;
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if (test__clzti2(0x020005008000000AuLL, 70))
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return 1;
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if (test__clzti2(0x720005008000000AuLL, 65))
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return 1;
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if (test__clzti2(0x820005008000000AuLL, 64))
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return 1;
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if (test__clzti2(make_ti(0x0000000080000000LL, 0x8000000800000000LL), 32))
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return 1;
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if (test__clzti2(make_ti(0x0000000100000000LL, 0x8000000800000000LL), 31))
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return 1;
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if (test__clzti2(make_ti(0x1000000100000000LL, 0x8000000800000000LL), 3))
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return 1;
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if (test__clzti2(make_ti(0x7000000100000000LL, 0x8000000800000000LL), 1))
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return 1;
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if (test__clzti2(make_ti(0x8000000100000000LL, 0x8000000800000000LL), 0))
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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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