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1// RUN: %clang_builtins %s %librt -o %t && %run %t2 3#define SINGLE_PRECISION4#include <fenv.h>5#include <float.h>6#include <limits.h>7#include <math.h>8#include <stdio.h>9#include "fp_lib.h"10 11int test__compiler_rt_scalbnf(const char *mode, fp_t x, int y) {12#if defined(__ve__)13 if (fpclassify(x) == FP_SUBNORMAL)14 return 0;15#endif16 fp_t crt_value = __compiler_rt_scalbnf(x, y);17 fp_t libm_value = scalbnf(x, y);18 // Consider +/-0 unequal, but disregard the sign/payload of NaN.19 if (toRep(crt_value) != toRep(libm_value) &&20 !(crt_isnan(crt_value) && crt_isnan(libm_value))) {21 printf("error: [%s] in __compiler_rt_scalbnf(%a [%X], %d) = %a [%X] "22 "!= %a [%X]\n",23 mode, x, toRep(x), y, crt_value, toRep(crt_value),24 libm_value, toRep(libm_value));25 return 1;26 }27 return 0;28}29 30fp_t cases[] = {31 -NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2,32 FLT_TRUE_MIN, FLT_TRUE_MIN*7, FLT_MIN, FLT_MAX,33 -1.001, 1.001, -1.002, 1.002, 1.e-6, -1.e-6,34 0x1.0p-125,35 0x1.0p-126,36 0x1.0p-127, // subnormal37 0x1.0p-128, // subnormal38};39 40int iterate_cases(const char *mode) {41 const unsigned N = sizeof(cases) / sizeof(cases[0]);42 unsigned i;43 for (i = 0; i < N; ++i) {44 int j;45 for (j = -5; j <= 5; ++j) {46 if (test__compiler_rt_scalbnf(mode, cases[i], j)) return 1;47 }48 if (test__compiler_rt_scalbnf(mode, cases[i], -1000)) return 1;49 if (test__compiler_rt_scalbnf(mode, cases[i], 1000)) return 1;50 if (test__compiler_rt_scalbnf(mode, cases[i], INT_MIN)) return 1;51 if (test__compiler_rt_scalbnf(mode, cases[i], INT_MAX)) return 1;52 }53 return 0;54}55 56int main() {57 if (iterate_cases("default")) return 1;58 59 // Rounding mode tests on supported architectures. __compiler_rt_scalbnf60 // should have the same rounding behavior as single-precision multiplication.61#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \62 defined(__i386__) || defined(__x86_64__)63// Skip these tests on Windows because the UCRT scalbnf function always behaves64// as if the default rounding mode is set (FE_TONEAREST).65// Also skip for newlib because although its scalbnf function does respect the66// rounding mode, where the tests trigger an underflow or overflow using a67// large exponent the result is rounded in the opposite direction to that which68// would be expected in the (FE_UPWARD) and (FE_DOWNWARD) modes.69# if !defined(_WIN32) && !defined(_NEWLIB_VERSION)70 fesetround(FE_UPWARD);71 if (iterate_cases("FE_UPWARD")) return 1;72 73 fesetround(FE_DOWNWARD);74 if (iterate_cases("FE_DOWNWARD")) return 1;75 76 fesetround(FE_TOWARDZERO);77 if (iterate_cases("FE_TOWARDZERO")) return 1;78#endif79 80 fesetround(FE_TONEAREST);81 if (iterate_cases("FE_TONEAREST")) return 1;82#endif83 84 return 0;85}86