d2ce3e9621
GCC provides these functions (e.g. __addtf3, etc.) in libgcc on x86_64. Since Clang supports float128, we can also enable the existing code by using float128 for fp_t if either __FLOAT128__ or __SIZEOF_FLOAT128__ is defined instead of only supporting these builtins for platforms with 128-bit IEEE long doubles. This commit defines a new tf_float typedef that matches a float with attribute((mode(TF)) on each given architecture. There are more tests that could be enabled for x86, but to keep the diff smaller, I restricted test changes to ones that started failing as part of this refactoring. This change has been tested on x86 (natively) and aarch64,powerpc64,riscv64 and sparc64 via qemu-user. This supersedes https://reviews.llvm.org/D98261 and should also cover the changes from https://github.com/llvm/llvm-project/pull/68041.
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_floatditf
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#include "int_lib.h"
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#include <complex.h>
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#include <math.h>
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#include <stdio.h>
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// The testcase currently assumes IEEE TF format, once that has been
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// fixed the defined(CRT_HAS_IEEE_TF) guard can be removed to enable it for
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// IBM 128 floats as well.
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#if defined(CRT_HAS_IEEE_TF)
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# include "fp_test.h"
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// Returns: long integer converted to tf_float
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COMPILER_RT_ABI tf_float __floatditf(di_int a);
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int test__floatditf(di_int a, uint64_t expectedHi, uint64_t expectedLo) {
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tf_float x = __floatditf(a);
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int ret = compareResultF128(x, expectedHi, expectedLo);
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if (ret)
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printf("error in __floatditf(%Ld) = %.20Lf, "
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"expected %.20Lf\n",
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a, x, fromRep128(expectedHi, expectedLo));
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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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#if defined(CRT_HAS_IEEE_TF)
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if (test__floatditf(0x7fffffffffffffff, UINT64_C(0x403dffffffffffff),
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UINT64_C(0xfffc000000000000)))
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return 1;
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if (test__floatditf(0x123456789abcdef1, UINT64_C(0x403b23456789abcd),
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UINT64_C(0xef10000000000000)))
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return 1;
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if (test__floatditf(0x2, UINT64_C(0x4000000000000000), UINT64_C(0x0)))
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return 1;
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if (test__floatditf(0x1, UINT64_C(0x3fff000000000000), UINT64_C(0x0)))
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return 1;
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if (test__floatditf(0x0, UINT64_C(0x0), UINT64_C(0x0)))
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return 1;
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if (test__floatditf(0xffffffffffffffff, UINT64_C(0xbfff000000000000),
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UINT64_C(0x0)))
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return 1;
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if (test__floatditf(0xfffffffffffffffe, UINT64_C(0xc000000000000000),
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UINT64_C(0x0)))
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return 1;
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if (test__floatditf(-0x123456789abcdef1, UINT64_C(0xc03b23456789abcd),
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UINT64_C(0xef10000000000000)))
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return 1;
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if (test__floatditf(0x8000000000000000, UINT64_C(0xc03e000000000000),
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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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