| // RUN: %clang_builtins %s %librt -o %t && %run %t |
| |
| #define DOUBLE_PRECISION |
| #include <fenv.h> |
| #include <float.h> |
| #include <limits.h> |
| #include <math.h> |
| #include <stdio.h> |
| #include "fp_lib.h" |
| |
| int test__compiler_rt_scalbn(const char *mode, fp_t x, int y) { |
| #if defined(__ve__) |
| if (fpclassify(x) == FP_SUBNORMAL) |
| return 0; |
| #endif |
| fp_t crt_value = __compiler_rt_scalbn(x, y); |
| fp_t libm_value = scalbn(x, y); |
| // Consider +/-0 unequal, but disregard the sign/payload of NaN. |
| if (toRep(crt_value) != toRep(libm_value) && |
| !(crt_isnan(crt_value) && crt_isnan(libm_value))) { |
| printf("error: [%s] in __compiler_rt_scalbn(%a [%llX], %d) = %a [%llX] " |
| "!= %a [%llX]\n", |
| mode, x, (unsigned long long)toRep(x), y, |
| crt_value, (unsigned long long)toRep(crt_value), |
| libm_value, (unsigned long long)toRep(libm_value)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| fp_t cases[] = { |
| -NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2, |
| DBL_TRUE_MIN, DBL_TRUE_MIN*7, DBL_MIN, DBL_MAX, |
| -1.001, 1.001, -1.002, 1.002, 1.e-6, -1.e-6, |
| 0x1.0p-1021, |
| 0x1.0p-1022, |
| 0x1.0p-1023, // subnormal |
| 0x1.0p-1024, // subnormal |
| }; |
| |
| int iterate_cases(const char *mode) { |
| const unsigned N = sizeof(cases) / sizeof(cases[0]); |
| unsigned i; |
| for (i = 0; i < N; ++i) { |
| int j; |
| for (j = -5; j <= 5; ++j) { |
| if (test__compiler_rt_scalbn(mode, cases[i], j)) return 1; |
| } |
| if (test__compiler_rt_scalbn(mode, cases[i], -10000)) return 1; |
| if (test__compiler_rt_scalbn(mode, cases[i], 10000)) return 1; |
| if (test__compiler_rt_scalbn(mode, cases[i], INT_MIN)) return 1; |
| if (test__compiler_rt_scalbn(mode, cases[i], INT_MAX)) return 1; |
| } |
| return 0; |
| } |
| |
| int main() { |
| if (iterate_cases("default")) return 1; |
| |
| // Rounding mode tests on supported architectures. __compiler_rt_scalbn |
| // should have the same rounding behavior as double-precision multiplication. |
| #if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \ |
| defined(__i386__) || defined(__x86_64__) |
| // Skip these tests for MSVC because its scalbn function always behaves as if |
| // the default rounding mode is set (FE_TONEAREST). |
| #ifndef _MSC_VER |
| fesetround(FE_UPWARD); |
| if (iterate_cases("FE_UPWARD")) return 1; |
| |
| fesetround(FE_DOWNWARD); |
| if (iterate_cases("FE_DOWNWARD")) return 1; |
| |
| fesetround(FE_TOWARDZERO); |
| if (iterate_cases("FE_TOWARDZERO")) return 1; |
| #endif |
| |
| fesetround(FE_TONEAREST); |
| if (iterate_cases("FE_TONEAREST")) return 1; |
| #endif |
| |
| return 0; |
| } |