910a4bf5b7
This patch implements __extendxftf2 (long double -> f128) and __trunctfxf2 (f128 -> long double) on x86_64. This is a preparation to unblock https://reviews.llvm.org/D53608, We intentionally do not modify compiler-rt/lib/builtins/fp_lib.h in this PR (in particular, to limit the scope and avoid exposing other functions on X86_64 in this PR). Instead, TODOs were added to use fp_lib.h once it is available. Test plan: 1. ninja check-compiler-rt (verified on X86_64 and on Aarch64) In particular, new tests (extendxftf2_test.c and trunctfxf2_test.c) were added. 2. compared the results of conversions with what other compilers (gcc) produce.
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_multf3
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#include <stdio.h>
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#if __LDBL_MANT_DIG__ == 113
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#include "int_lib.h"
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#include "fp_test.h"
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// Returns: a * b
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COMPILER_RT_ABI long double __multf3(long double a, long double b);
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int test__multf3(long double a, long double b,
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uint64_t expectedHi, uint64_t expectedLo)
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{
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long double x = __multf3(a, b);
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int ret = compareResultF128(x, expectedHi, expectedLo);
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if (ret){
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printf("error in test__multf3(%.20Lf, %.20Lf) = %.20Lf, "
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"expected %.20Lf\n", a, b, x,
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fromRep128(expectedHi, expectedLo));
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}
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return ret;
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}
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char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
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#endif
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int main()
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{
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#if __LDBL_MANT_DIG__ == 113
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// qNaN * any = qNaN
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if (test__multf3(makeQNaN128(),
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0x1.23456789abcdefp+5L,
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UINT64_C(0x7fff800000000000),
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UINT64_C(0x0)))
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return 1;
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// NaN * any = NaN
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if (test__multf3(makeNaN128(UINT64_C(0x800030000000)),
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0x1.23456789abcdefp+5L,
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UINT64_C(0x7fff800000000000),
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UINT64_C(0x0)))
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return 1;
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// inf * any = inf
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if (test__multf3(makeInf128(),
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0x1.23456789abcdefp+5L,
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UINT64_C(0x7fff000000000000),
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UINT64_C(0x0)))
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return 1;
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// any * any
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if (test__multf3(0x1.2eab345678439abcdefea56782346p+5L,
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0x1.edcb34a235253948765432134674fp-1L,
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UINT64_C(0x400423e7f9e3c9fc),
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UINT64_C(0xd906c2c2a85777c4)))
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return 1;
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if (test__multf3(0x1.353e45674d89abacc3a2ebf3ff4ffp-50L,
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0x1.ed8764648369535adf4be3214567fp-9L,
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UINT64_C(0x3fc52a163c6223fc),
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UINT64_C(0xc94c4bf0430768b4)))
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return 1;
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if (test__multf3(0x1.234425696abcad34a35eeffefdcbap+456L,
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0x451.ed98d76e5d46e5f24323dff21ffp+600L,
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UINT64_C(0x44293a91de5e0e94),
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UINT64_C(0xe8ed17cc2cdf64ac)))
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return 1;
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if (test__multf3(0x1.4356473c82a9fabf2d22ace345defp-234L,
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0x1.eda98765476743ab21da23d45678fp-455L,
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UINT64_C(0x3d4f37c1a3137cae),
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UINT64_C(0xfc6807048bc2836a)))
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return 1;
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// underflow
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if (test__multf3(0x1.23456734245345p-10000L,
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0x1.edcba524498724p-6497L,
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UINT64_C(0x0),
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UINT64_C(0x0)))
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return 1;
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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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