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Diffstat (limited to 'test/Unit/fixunsdfsi_test.c')
-rw-r--r-- | test/Unit/fixunsdfsi_test.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/test/Unit/fixunsdfsi_test.c b/test/Unit/fixunsdfsi_test.c new file mode 100644 index 000000000000..9e6b95d55500 --- /dev/null +++ b/test/Unit/fixunsdfsi_test.c @@ -0,0 +1,100 @@ +//===-- fixunsdfsi_test.c - Test __fixunsdfsi -----------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __fixunsdfsi for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" +#include <stdio.h> + +// Returns: convert a to a unsigned int, rounding toward zero. +// Negative values all become zero. + +// Assumption: double is a IEEE 64 bit floating point type +// su_int is a 32 bit integral type +// value in double is representable in su_int or is negative +// (no range checking performed) + +// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + +su_int __fixunsdfsi(double a); + +int test__fixunsdfsi(double a, su_int expected) +{ + su_int x = __fixunsdfsi(a); + if (x != expected) + printf("error in __fixunsdfsi(%A) = %X, expected %X\n", a, x, expected); + return x != expected; +} + +char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0}; +char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0}; + +int main() +{ + if (test__fixunsdfsi(0.0, 0)) + return 1; + + if (test__fixunsdfsi(0.5, 0)) + return 1; + if (test__fixunsdfsi(0.99, 0)) + return 1; + if (test__fixunsdfsi(1.0, 1)) + return 1; + if (test__fixunsdfsi(1.5, 1)) + return 1; + if (test__fixunsdfsi(1.99, 1)) + return 1; + if (test__fixunsdfsi(2.0, 2)) + return 1; + if (test__fixunsdfsi(2.01, 2)) + return 1; + if (test__fixunsdfsi(-0.5, 0)) + return 1; + if (test__fixunsdfsi(-0.99, 0)) + return 1; +#if !TARGET_LIBGCC + if (test__fixunsdfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec + return 1; + if (test__fixunsdfsi(-1.5, 0)) + return 1; + if (test__fixunsdfsi(-1.99, 0)) + return 1; + if (test__fixunsdfsi(-2.0, 0)) + return 1; + if (test__fixunsdfsi(-2.01, 0)) + return 1; +#endif + + if (test__fixunsdfsi(0x1.000000p+31, 0x80000000)) + return 1; + if (test__fixunsdfsi(0x1.FFFFFEp+31, 0xFFFFFF00)) + return 1; + if (test__fixunsdfsi(0x1.FFFFFEp+30, 0x7FFFFF80)) + return 1; + if (test__fixunsdfsi(0x1.FFFFFCp+30, 0x7FFFFF00)) + return 1; + +#if !TARGET_LIBGCC + if (test__fixunsdfsi(-0x1.FFFFFEp+30, 0)) + return 1; + if (test__fixunsdfsi(-0x1.FFFFFCp+30, 0)) + return 1; +#endif + + if (test__fixunsdfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF)) + return 1; + if (test__fixunsdfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF)) + return 1; + if (test__fixunsdfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE)) + return 1; + + return 0; +} |