96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_fixunsxfsi
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#include "int_lib.h"
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#include <stdio.h>
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#if HAS_80_BIT_LONG_DOUBLE
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// Returns: convert a to a unsigned int, rounding toward zero.
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// Negative values all become zero.
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// Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
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// su_int is a 32 bit integral type
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// value in long double is representable in su_int or is negative
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// (no range checking performed)
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// gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
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// 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
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COMPILER_RT_ABI su_int __fixunsxfsi(long double a);
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int test__fixunsxfsi(long double a, su_int expected)
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{
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su_int x = __fixunsxfsi(a);
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if (x != expected)
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printf("error in __fixunsxfsi(%LA) = %X, expected %X\n", a, x, expected);
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return x != expected;
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}
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char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
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char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
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#endif
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int main()
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{
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#if HAS_80_BIT_LONG_DOUBLE
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if (test__fixunsxfsi(0.0, 0))
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return 1;
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if (test__fixunsxfsi(0.5, 0))
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return 1;
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if (test__fixunsxfsi(0.99, 0))
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return 1;
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if (test__fixunsxfsi(1.0, 1))
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return 1;
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if (test__fixunsxfsi(1.5, 1))
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return 1;
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if (test__fixunsxfsi(1.99, 1))
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return 1;
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if (test__fixunsxfsi(2.0, 2))
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return 1;
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if (test__fixunsxfsi(2.01, 2))
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return 1;
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if (test__fixunsxfsi(-0.5, 0))
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return 1;
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if (test__fixunsxfsi(-0.99, 0))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunsxfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
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return 1;
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if (test__fixunsxfsi(-1.5, 0))
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return 1;
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if (test__fixunsxfsi(-1.99, 0))
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return 1;
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if (test__fixunsxfsi(-2.0, 0))
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return 1;
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if (test__fixunsxfsi(-2.01, 0))
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return 1;
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#endif
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if (test__fixunsxfsi(0x1.000000p+31, 0x80000000))
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return 1;
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if (test__fixunsxfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
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return 1;
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if (test__fixunsxfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
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return 1;
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if (test__fixunsxfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunsxfsi(-0x1.FFFFFEp+30, 0))
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return 1;
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if (test__fixunsxfsi(-0x1.FFFFFCp+30, 0))
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return 1;
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#endif
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if (test__fixunsxfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
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return 1;
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if (test__fixunsxfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
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return 1;
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if (test__fixunsxfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
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return 1;
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#endif
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return 0;
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}
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