86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_fixunssfsi
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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 int, rounding toward zero.
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// Negative values all become zero.
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// Assumption: float is a IEEE 32 bit floating point type
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// su_int is a 32 bit integral type
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// value in float is representable in su_int or is negative
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// (no range checking performed)
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// seee eeee emmm mmmm mmmm mmmm mmmm mmmm
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COMPILER_RT_ABI su_int __fixunssfsi(float a);
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int test__fixunssfsi(float a, su_int expected)
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{
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su_int x = __fixunssfsi(a);
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if (x != expected)
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printf("error in __fixunssfsi(%A) = %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(float)*CHAR_BIT == 32] = {0};
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int main()
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{
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if (test__fixunssfsi(0.0F, 0))
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return 1;
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if (test__fixunssfsi(0.5F, 0))
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return 1;
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if (test__fixunssfsi(0.99F, 0))
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return 1;
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if (test__fixunssfsi(1.0F, 1))
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return 1;
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if (test__fixunssfsi(1.5F, 1))
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return 1;
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if (test__fixunssfsi(1.99F, 1))
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return 1;
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if (test__fixunssfsi(2.0F, 2))
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return 1;
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if (test__fixunssfsi(2.01F, 2))
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return 1;
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if (test__fixunssfsi(-0.5F, 0))
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return 1;
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if (test__fixunssfsi(-0.99F, 0))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunssfsi(-1.0F, 0)) // libgcc ignores "returns 0 for negative input" spec
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return 1;
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if (test__fixunssfsi(-1.5F, 0))
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return 1;
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if (test__fixunssfsi(-1.99F, 0))
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return 1;
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if (test__fixunssfsi(-2.0F, 0))
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return 1;
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if (test__fixunssfsi(-2.01F, 0))
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return 1;
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#endif
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if (test__fixunssfsi(0x1.000000p+31F, 0x80000000))
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return 1;
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if (test__fixunssfsi(0x1.000000p+32F, 0xFFFFFFFF))
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return 1;
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if (test__fixunssfsi(0x1.FFFFFEp+31F, 0xFFFFFF00))
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return 1;
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if (test__fixunssfsi(0x1.FFFFFEp+30F, 0x7FFFFF80))
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return 1;
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if (test__fixunssfsi(0x1.FFFFFCp+30F, 0x7FFFFF00))
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return 1;
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#if !TARGET_LIBGCC
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if (test__fixunssfsi(-0x1.FFFFFEp+30F, 0))
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return 1;
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if (test__fixunssfsi(-0x1.FFFFFCp+30F, 0))
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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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