db61b1844e
This patch adds both extendhftf2 and trunctfhf2 to support conversion between half-precision and quad-precision floating-point values. They are built iff the compiler supports _Float16. Some notes on ARM plaforms: while fp16 is supported on all architectures, _Float16 is supported only for 32-bit ARM, 64-bit ARM, and SPIR (as indicated by clang/docs/LanguageExtensions.rst). Also, fp16 is a storage format and 64-bit ARM supports floating-point convert precision to half as base armv8-a instruction. This patch does not change the ABI for 32-bit ARM, it will continue to pass _Float16 as uint16. This re-enabled revert done by https://reviews.llvm.org/rGb534beabeed3ba1777cd0ff9ce552d077e496726 Differential Revision: https://reviews.llvm.org/D92242
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_extendhftf2
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#include "int_lib.h"
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#include <stdio.h>
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#if __LDBL_MANT_DIG__ == 113 && defined(COMPILER_RT_HAS_FLOAT16)
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#include "fp_test.h"
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COMPILER_RT_ABI long double __extendhftf2(TYPE_FP16 a);
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int test__extendhftf2(TYPE_FP16 a, uint64_t expectedHi, uint64_t expectedLo) {
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long double x = __extendhftf2(a);
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int ret = compareResultLD(x, expectedHi, expectedLo);
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if (ret) {
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printf("error in test__extendhftf2(%#.4x) = %.20Lf, "
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"expected %.20Lf\n",
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toRep16(a), 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(TYPE_FP16) * CHAR_BIT == 16] = {0};
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#endif
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int main() {
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#if __LDBL_MANT_DIG__ == 113 && defined(COMPILER_RT_HAS_FLOAT16)
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// qNaN
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if (test__extendhftf2(makeQNaN16(),
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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
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if (test__extendhftf2(makeNaN16(UINT16_C(0x0100)),
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UINT64_C(0x7fff400000000000),
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UINT64_C(0x0)))
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return 1;
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// inf
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if (test__extendhftf2(makeInf16(),
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UINT64_C(0x7fff000000000000),
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UINT64_C(0x0)))
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return 1;
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if (test__extendhftf2(-makeInf16(),
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UINT64_C(0xffff000000000000),
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UINT64_C(0x0)))
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return 1;
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// zero
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if (test__extendhftf2(fromRep16(0x0U),
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UINT64_C(0x0), UINT64_C(0x0)))
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return 1;
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if (test__extendhftf2(fromRep16(0x8000U),
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UINT64_C(0x8000000000000000),
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UINT64_C(0x0)))
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return 1;
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// denormal
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if (test__extendhftf2(fromRep16(0x0010U),
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UINT64_C(0x3feb000000000000),
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UINT64_C(0x0000000000000000)))
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return 1;
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if (test__extendhftf2(fromRep16(0x0001U),
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UINT64_C(0x3fe7000000000000),
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UINT64_C(0x0000000000000000)))
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return 1;
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if (test__extendhftf2(fromRep16(0x8001U),
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UINT64_C(0xbfe7000000000000),
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UINT64_C(0x0000000000000000)))
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return 1;
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// pi
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if (test__extendhftf2(fromRep16(0x4248U),
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UINT64_C(0x4000920000000000),
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UINT64_C(0x0000000000000000)))
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return 1;
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if (test__extendhftf2(fromRep16(0xc248U),
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UINT64_C(0xc000920000000000),
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UINT64_C(0x0000000000000000)))
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return 1;
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if (test__extendhftf2(fromRep16(0x508cU),
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UINT64_C(0x4004230000000000),
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UINT64_C(0x0)))
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return 1;
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if (test__extendhftf2(fromRep16(0x1bb7U),
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UINT64_C(0x3ff6edc000000000),
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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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