forked from OSchip/llvm-project
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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#define QUAD_PRECISION
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#include <fenv.h>
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#include <float.h>
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#include <limits.h>
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#include <math.h>
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#include <stdio.h>
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#include "fp_lib.h"
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#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
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int test__compiler_rt_scalbnl(const char *mode, fp_t x, int y) {
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fp_t crt_value = __compiler_rt_scalbnl(x, y);
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fp_t libm_value = scalbnl(x, y);
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// Consider +/-0 unequal, but disregard the sign/payload of NaN.
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if (toRep(crt_value) != toRep(libm_value) &&
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!(crt_isnan(crt_value) && crt_isnan(libm_value))) {
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// Split expected values into two for printf
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twords x_t, crt_value_t, libm_value_t;
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x_t.all = toRep(x);
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crt_value_t.all = toRep(crt_value);
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libm_value_t.all = toRep(libm_value);
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printf(
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"error: [%s] in __compiler_rt_scalbnl([%llX %llX], %d) = "
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"[%llX %llX] != [%llX %llX]\n",
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mode, (unsigned long long)x_t.s.high, (unsigned long long)x_t.s.low, y,
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(unsigned long long)crt_value_t.s.high,
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(unsigned long long)crt_value_t.s.low,
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(unsigned long long)libm_value_t.s.high,
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(unsigned long long)libm_value_t.s.low);
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return 1;
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}
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return 0;
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}
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fp_t cases[] = {
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-NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2,
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LDBL_TRUE_MIN, LDBL_MIN, LDBL_MAX,
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-1.001, 1.001, -1.002, 1.002, 1.e-6, -1.e-6,
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0x1.0p-16381L,
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0x1.0p-16382L,
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0x1.0p-16383L, // subnormal
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0x1.0p-16384L, // subnormal
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};
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int iterate_cases(const char *mode) {
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const unsigned N = sizeof(cases) / sizeof(cases[0]);
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unsigned i;
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for (i = 0; i < N; ++i) {
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int j;
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for (j = -5; j <= 5; ++j) {
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if (test__compiler_rt_scalbnl(mode, cases[i], j)) return 1;
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}
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if (test__compiler_rt_scalbnl(mode, cases[i], -100000)) return 1;
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if (test__compiler_rt_scalbnl(mode, cases[i], 100000)) return 1;
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if (test__compiler_rt_scalbnl(mode, cases[i], INT_MIN)) return 1;
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if (test__compiler_rt_scalbnl(mode, cases[i], INT_MAX)) return 1;
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}
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return 0;
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}
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#endif
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int main() {
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#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
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if (iterate_cases("default")) return 1;
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// Skip rounding mode tests (fesetround) because compiler-rt's quad-precision
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// multiply also ignores the current rounding mode.
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#else
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printf("skipped\n");
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#endif
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return 0;
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}
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