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Diffstat (limited to 'test/Unit/fixunsdfdi_test.c')
-rw-r--r-- | test/Unit/fixunsdfdi_test.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/test/Unit/fixunsdfdi_test.c b/test/Unit/fixunsdfdi_test.c new file mode 100644 index 00000000..fbdf3682 --- /dev/null +++ b/test/Unit/fixunsdfdi_test.c @@ -0,0 +1,106 @@ +//===-- fixunsdfdi_test.c - Test __fixunsdfdi -----------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __fixunsdfdi for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" +#include <stdio.h> + +// Returns: convert a to a unsigned long long, rounding toward zero. +// Negative values all become zero. + +// Assumption: double is a IEEE 64 bit floating point type +// du_int is a 64 bit integral type +// value in double is representable in du_int or is negative +// (no range checking performed) + +// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + +du_int __fixunsdfdi(double a); + +int test__fixunsdfdi(double a, du_int expected) +{ + du_int x = __fixunsdfdi(a); + if (x != expected) + printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected); + return x != expected; +} + +char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0}; +char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0}; +char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0}; + +int main() +{ + if (test__fixunsdfdi(0.0, 0)) + return 1; + + if (test__fixunsdfdi(0.5, 0)) + return 1; + if (test__fixunsdfdi(0.99, 0)) + return 1; + if (test__fixunsdfdi(1.0, 1)) + return 1; + if (test__fixunsdfdi(1.5, 1)) + return 1; + if (test__fixunsdfdi(1.99, 1)) + return 1; + if (test__fixunsdfdi(2.0, 2)) + return 1; + if (test__fixunsdfdi(2.01, 2)) + return 1; + if (test__fixunsdfdi(-0.5, 0)) + return 1; + if (test__fixunsdfdi(-0.99, 0)) + return 1; +#if !TARGET_LIBGCC + if (test__fixunsdfdi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec + return 1; + if (test__fixunsdfdi(-1.5, 0)) + return 1; + if (test__fixunsdfdi(-1.99, 0)) + return 1; + if (test__fixunsdfdi(-2.0, 0)) + return 1; + if (test__fixunsdfdi(-2.01, 0)) + return 1; +#endif + + if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL)) + return 1; + if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL)) + return 1; + +#if !TARGET_LIBGCC + if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0)) + return 1; + if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0)) + return 1; +#endif + + if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL)) + return 1; + if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL)) + return 1; + if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL)) + return 1; + if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL)) + return 1; + +#if !TARGET_LIBGCC + if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0)) + return 1; + if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0)) + return 1; +#endif + + return 0; +} |