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23 lines
1,007 B
C
23 lines
1,007 B
C
/*
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* Double-precision polynomial coefficients for scalar asinh(x)
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*
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* Copyright (c) 2022-2023, Arm Limited.
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* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
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*/
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#include "math_config.h"
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/* asinh(x) is odd, and the first term of the Taylor expansion is x, so we can
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approximate the function by x + x^3 * P(x^2), where P(z) has the form:
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C0 + C1 * z + C2 * z^2 + C3 * z^3 + ...
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Note P is evaluated on even powers of x only. See tools/asinh.sollya for the
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algorithm used to generate these coefficients. */
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const struct asinh_data __asinh_data
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= {.poly
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= {-0x1.55555555554a7p-3, 0x1.3333333326c7p-4, -0x1.6db6db68332e6p-5,
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0x1.f1c71b26fb40dp-6, -0x1.6e8b8b654a621p-6, 0x1.1c4daa9e67871p-6,
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-0x1.c9871d10885afp-7, 0x1.7a16e8d9d2ecfp-7, -0x1.3ddca533e9f54p-7,
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0x1.0becef748dafcp-7, -0x1.b90c7099dd397p-8, 0x1.541f2bb1ffe51p-8,
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-0x1.d217026a669ecp-9, 0x1.0b5c7977aaf7p-9, -0x1.e0f37daef9127p-11,
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0x1.388b5fe542a6p-12, -0x1.021a48685e287p-14, 0x1.93d4ba83d34dap-18}};
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