123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_fixunsdfti
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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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// Returns: convert a to a unsigned long long, rounding toward zero.
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// Negative values all become zero.
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// Assumption: double is a IEEE 64 bit floating point type
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// tu_int is a 64 bit integral type
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// value in double is representable in tu_int or is negative
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// (no range checking performed)
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// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
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#ifdef CRT_HAS_128BIT
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COMPILER_RT_ABI tu_int __fixunsdfti(double a);
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int test__fixunsdfti(double a, tu_int expected)
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{
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tu_int x = __fixunsdfti(a);
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if (x != expected)
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{
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utwords xt;
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xt.all = x;
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utwords expectedt;
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expectedt.all = expected;
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printf("error in __fixunsdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
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a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
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}
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return x != expected;
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}
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char assumption_1[sizeof(tu_int) == 2*sizeof(du_int)] = {0};
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char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
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char assumption_3[sizeof(double)*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__fixunsdfti(0.0, 0))
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return 1;
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if (test__fixunsdfti(0.5, 0))
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return 1;
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if (test__fixunsdfti(0.99, 0))
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return 1;
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if (test__fixunsdfti(1.0, 1))
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return 1;
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if (test__fixunsdfti(1.5, 1))
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return 1;
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if (test__fixunsdfti(1.99, 1))
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return 1;
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if (test__fixunsdfti(2.0, 2))
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return 1;
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if (test__fixunsdfti(2.01, 2))
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return 1;
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if (test__fixunsdfti(-0.5, 0))
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return 1;
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if (test__fixunsdfti(-0.99, 0))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunsdfti(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
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return 1;
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if (test__fixunsdfti(-1.5, 0))
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return 1;
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if (test__fixunsdfti(-1.99, 0))
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return 1;
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if (test__fixunsdfti(-2.0, 0))
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return 1;
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if (test__fixunsdfti(-2.01, 0))
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return 1;
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#endif
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if (test__fixunsdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
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return 1;
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if (test__fixunsdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunsdfti(-0x1.FFFFFEp+62, 0))
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return 1;
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if (test__fixunsdfti(-0x1.FFFFFCp+62, 0))
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return 1;
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#endif
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if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800ULL))
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return 1;
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if (test__fixunsdfti(0x1.0000000000000p+63, 0x8000000000000000ULL))
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return 1;
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if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00ULL))
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return 1;
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if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800ULL))
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return 1;
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if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+127, make_ti(0xFFFFFFFFFFFFF800ULL, 0)))
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return 1;
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if (test__fixunsdfti(0x1.0000000000000p+127, make_ti(0x8000000000000000ULL, 0)))
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return 1;
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if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00ULL, 0)))
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return 1;
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if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800ULL, 0)))
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return 1;
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if (test__fixunsdfti(0x1.0000000000000p+128, make_ti(0xFFFFFFFFFFFFFFFFULL,
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0xFFFFFFFFFFFFFFFFULL)))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunsdfti(-0x1.FFFFFFFFFFFFFp+62, 0))
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return 1;
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if (test__fixunsdfti(-0x1.FFFFFFFFFFFFEp+62, 0))
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return 1;
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#endif
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#endif
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return 0;
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}
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