| 1 | // RUN: %clang_builtins %s %librt -o %t && %run %t |
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| 2 | // REQUIRES: librt_has_subtf3 |
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| 3 | |
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| 4 | #include <fenv.h> |
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| 5 | #include <stdio.h> |
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| 6 | |
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| 7 | #if __LDBL_MANT_DIG__ == 113 |
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| 8 | |
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| 9 | #include "int_lib.h" |
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| 10 | #include "fp_test.h" |
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| 11 | |
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| 12 | // Returns: a - b |
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| 13 | COMPILER_RT_ABI long double __subtf3(long double a, long double b); |
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| 14 | |
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| 15 | int test__subtf3(long double a, long double b, |
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| 16 | uint64_t expectedHi, uint64_t expectedLo) |
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| 17 | { |
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| 18 | long double x = __subtf3(a, b); |
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| 19 | int ret = compareResultF128(x, expectedHi, expectedLo); |
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| 20 | |
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| 21 | if (ret){ |
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| 22 | printf("error in test__subtf3(%.20Lf, %.20Lf) = %.20Lf, " |
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| 23 | "expected %.20Lf\n" , a, b, x, |
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| 24 | fromRep128(expectedHi, expectedLo)); |
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| 25 | } |
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| 26 | return ret; |
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| 27 | } |
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| 28 | |
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| 29 | char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0}; |
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| 30 | |
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| 31 | #endif |
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| 32 | |
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| 33 | int main() |
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| 34 | { |
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| 35 | #if __LDBL_MANT_DIG__ == 113 |
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| 36 | // qNaN - any = qNaN |
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| 37 | if (test__subtf3(makeQNaN128(), |
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| 38 | 0x1.23456789abcdefp+5L, |
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| 39 | UINT64_C(0x7fff800000000000), |
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| 40 | UINT64_C(0x0))) |
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| 41 | return 1; |
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| 42 | // NaN - any = NaN |
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| 43 | if (test__subtf3(makeNaN128(UINT64_C(0x800030000000)), |
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| 44 | 0x1.23456789abcdefp+5L, |
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| 45 | UINT64_C(0x7fff800000000000), |
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| 46 | UINT64_C(0x0))) |
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| 47 | return 1; |
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| 48 | // inf - any = inf |
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| 49 | if (test__subtf3(makeInf128(), |
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| 50 | 0x1.23456789abcdefp+5L, |
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| 51 | UINT64_C(0x7fff000000000000), |
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| 52 | UINT64_C(0x0))) |
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| 53 | return 1; |
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| 54 | // any - any |
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| 55 | if (test__subtf3(0x1.234567829a3bcdef5678ade36734p+5L, |
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| 56 | 0x1.ee9d7c52354a6936ab8d7654321fp-1L, |
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| 57 | UINT64_C(0x40041b8af1915166), |
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| 58 | UINT64_C(0xa44a7bca780a166c))) |
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| 59 | return 1; |
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| 60 | |
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| 61 | #if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \ |
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| 62 | defined(i386) || defined(__x86_64__) || (defined(__loongarch__) && \ |
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| 63 | __loongarch_frlen != 0) |
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| 64 | // Rounding mode tests on supported architectures |
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| 65 | const long double m = 1234.02L, n = 0.01L; |
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| 66 | |
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| 67 | fesetround(FE_UPWARD); |
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| 68 | if (test__subtf3(m, n, |
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| 69 | UINT64_C(0x40093480a3d70a3d), |
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| 70 | UINT64_C(0x70a3d70a3d70a3d7))) |
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| 71 | return 1; |
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| 72 | |
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| 73 | fesetround(FE_DOWNWARD); |
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| 74 | if (test__subtf3(m, n, |
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| 75 | UINT64_C(0x40093480a3d70a3d), |
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| 76 | UINT64_C(0x70a3d70a3d70a3d6))) |
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| 77 | return 1; |
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| 78 | |
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| 79 | fesetround(FE_TOWARDZERO); |
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| 80 | if (test__subtf3(m, n, |
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| 81 | UINT64_C(0x40093480a3d70a3d), |
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| 82 | UINT64_C(0x70a3d70a3d70a3d6))) |
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| 83 | return 1; |
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| 84 | |
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| 85 | fesetround(FE_TONEAREST); |
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| 86 | if (test__subtf3(m, n, |
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| 87 | UINT64_C(0x40093480a3d70a3d), |
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| 88 | UINT64_C(0x70a3d70a3d70a3d7))) |
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| 89 | return 1; |
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| 90 | #endif |
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| 91 | |
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| 92 | #else |
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| 93 | printf(format: "skipped\n" ); |
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| 94 | |
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| 95 | #endif |
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| 96 | return 0; |
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| 97 | } |
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| 98 | |
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