c288715e95
On AArch64 it allows use the native FP16 ABI (although libcalls are not emitted for fptrunc/fpext lowering), while on other architectures the expected current semantic is preserved (arm for instance). For testing the _Float16 usage is enabled by architecture base, currently only for arm, aarch64, and arm64. This re-enabled revert done by https://reviews.llvm.org/rGb534beabeed3ba1777cd0ff9ce552d077e496726 Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D92241
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_truncdfhf2
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#include <stdio.h>
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#include "fp_test.h"
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TYPE_FP16 __truncdfhf2(double a);
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int test__truncdfhf2(double a, uint16_t expected)
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{
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TYPE_FP16 x = __truncdfhf2(a);
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int ret = compareResultH(x, expected);
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if (ret){
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printf("error in test__truncdfhf2(%lf) = %#.4x, "
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"expected %#.4x\n", a, toRep16(x), expected);
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}
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return ret;
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}
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char assumption_1[sizeof(__fp16) * CHAR_BIT == 16] = {0};
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int main()
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{
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// qNaN
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if (test__truncdfhf2(makeQNaN64(),
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UINT16_C(0x7e00)))
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return 1;
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// NaN
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if (test__truncdfhf2(makeNaN64(UINT64_C(0x8000)),
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UINT16_C(0x7e00)))
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return 1;
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// inf
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if (test__truncdfhf2(makeInf64(),
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UINT16_C(0x7c00)))
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return 1;
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if (test__truncdfhf2(-makeInf64(),
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UINT16_C(0xfc00)))
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return 1;
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// zero
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if (test__truncdfhf2(0.0, UINT16_C(0x0)))
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return 1;
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if (test__truncdfhf2(-0.0, UINT16_C(0x8000)))
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return 1;
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if (test__truncdfhf2(3.1415926535,
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UINT16_C(0x4248)))
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return 1;
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if (test__truncdfhf2(-3.1415926535,
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UINT16_C(0xc248)))
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return 1;
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if (test__truncdfhf2(0x1.987124876876324p+1000,
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UINT16_C(0x7c00)))
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return 1;
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if (test__truncdfhf2(0x1.987124876876324p+12,
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UINT16_C(0x6e62)))
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return 1;
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if (test__truncdfhf2(0x1.0p+0,
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UINT16_C(0x3c00)))
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return 1;
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if (test__truncdfhf2(0x1.0p-14,
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UINT16_C(0x0400)))
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return 1;
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// denormal
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if (test__truncdfhf2(0x1.0p-20,
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UINT16_C(0x0010)))
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return 1;
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if (test__truncdfhf2(0x1.0p-24,
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UINT16_C(0x0001)))
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return 1;
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if (test__truncdfhf2(-0x1.0p-24,
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UINT16_C(0x8001)))
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return 1;
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if (test__truncdfhf2(0x1.5p-25,
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UINT16_C(0x0001)))
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return 1;
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// and back to zero
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if (test__truncdfhf2(0x1.0p-25,
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UINT16_C(0x0000)))
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return 1;
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if (test__truncdfhf2(-0x1.0p-25,
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UINT16_C(0x8000)))
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return 1;
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// max (precise)
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if (test__truncdfhf2(65504.0,
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UINT16_C(0x7bff)))
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return 1;
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// max (rounded)
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if (test__truncdfhf2(65519.0,
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UINT16_C(0x7bff)))
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return 1;
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// max (to +inf)
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if (test__truncdfhf2(65520.0,
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UINT16_C(0x7c00)))
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return 1;
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if (test__truncdfhf2(-65520.0,
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UINT16_C(0xfc00)))
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return 1;
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if (test__truncdfhf2(65536.0,
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UINT16_C(0x7c00)))
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return 1;
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return 0;
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}
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