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75 lines
3.2 KiB
75 lines
3.2 KiB
4 months ago
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/*
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* Copyright (c) 2014 Advanced Micro Devices, Inc.
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* Copyright (c) 2016 Aaron Watry
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#define __CLC_AS_GENTYPE __CLC_XCONCAT(as_, __CLC_GENTYPE)
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#define __CLC_AS_INTN __CLC_XCONCAT(as_, __CLC_INTN)
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#if __CLC_FPSIZE == 32
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_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE frexp(__CLC_GENTYPE x, __CLC_ADDRESS_SPACE __CLC_INTN *ep) {
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__CLC_INTN i = __CLC_AS_INTN(x);
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__CLC_INTN ai = i & 0x7fffffff;
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__CLC_INTN d = ai > 0 & ai < 0x00800000;
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/* scale subnormal by 2^26 without multiplying */
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__CLC_GENTYPE s = __CLC_AS_GENTYPE(ai | 0x0d800000) - 0x1.0p-100f;
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ai = select(ai, __CLC_AS_INTN(s), d);
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__CLC_INTN e = (ai >> 23) - 126 - select((__CLC_INTN)0, (__CLC_INTN)26, d);
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__CLC_INTN t = ai == (__CLC_INTN)0 | e == (__CLC_INTN)129;
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i = (i & (__CLC_INTN)0x80000000) | (__CLC_INTN)0x3f000000 | (ai & 0x007fffff);
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*ep = select(e, (__CLC_INTN)0, t);
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return select(__CLC_AS_GENTYPE(i), x, t);
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}
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#endif
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#if __CLC_FPSIZE == 64
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#ifdef __CLC_SCALAR
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#define __CLC_AS_LONGN as_long
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#define __CLC_LONGN long
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#define __CLC_CONVERT_INTN convert_int
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#else
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#define __CLC_AS_LONGN __CLC_XCONCAT(as_long, __CLC_VECSIZE)
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#define __CLC_LONGN __CLC_XCONCAT(long, __CLC_VECSIZE)
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#define __CLC_CONVERT_INTN __CLC_XCONCAT(convert_int, __CLC_VECSIZE)
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#endif
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_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE frexp(__CLC_GENTYPE x, __CLC_ADDRESS_SPACE __CLC_INTN *ep) {
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__CLC_LONGN i = __CLC_AS_LONGN(x);
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__CLC_LONGN ai = i & 0x7fffffffffffffffL;
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__CLC_LONGN d = ai > 0 & ai < 0x0010000000000000L;
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// scale subnormal by 2^54 without multiplying
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__CLC_GENTYPE s = __CLC_AS_GENTYPE(ai | 0x0370000000000000L) - 0x1.0p-968;
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ai = select(ai, __CLC_AS_LONGN(s), d);
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__CLC_LONGN e = (ai >> 52) - (__CLC_LONGN)1022 - select((__CLC_LONGN)0, (__CLC_LONGN)54, d);
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__CLC_LONGN t = ai == 0 | e == 1025;
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i = (i & (__CLC_LONGN)0x8000000000000000L) | (__CLC_LONGN)0x3fe0000000000000L | (ai & (__CLC_LONGN)0x000fffffffffffffL);
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*ep = __CLC_CONVERT_INTN(select(e, 0L, t));
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return select(__CLC_AS_GENTYPE(i), x, t);
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}
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#undef __CLC_AS_LONGN
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#undef __CLC_LONGN
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#undef __CLC_CONVERT_INTN
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#endif
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#undef __CLC_AS_GENTYPE
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#undef __CLC_AS_INTN
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