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39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
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#ifndef COSMOPOLITAN_LIBC_TINYMATH_HORNER_WRAP_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_TINYMATH_HORNER_WRAP_INTERNAL_H_
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/*
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* Helper macros for Horner polynomial evaluation.
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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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#define HORNER_1_(x, c, i) FMA(c(i + 1), x, c(i))
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#define HORNER_2_(x, c, i) FMA(HORNER_1_ (x, c, i + 1), x, c(i))
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#define HORNER_3_(x, c, i) FMA(HORNER_2_ (x, c, i + 1), x, c(i))
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#define HORNER_4_(x, c, i) FMA(HORNER_3_ (x, c, i + 1), x, c(i))
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#define HORNER_5_(x, c, i) FMA(HORNER_4_ (x, c, i + 1), x, c(i))
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#define HORNER_6_(x, c, i) FMA(HORNER_5_ (x, c, i + 1), x, c(i))
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#define HORNER_7_(x, c, i) FMA(HORNER_6_ (x, c, i + 1), x, c(i))
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#define HORNER_8_(x, c, i) FMA(HORNER_7_ (x, c, i + 1), x, c(i))
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#define HORNER_9_(x, c, i) FMA(HORNER_8_ (x, c, i + 1), x, c(i))
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#define HORNER_10_(x, c, i) FMA(HORNER_9_ (x, c, i + 1), x, c(i))
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#define HORNER_11_(x, c, i) FMA(HORNER_10_(x, c, i + 1), x, c(i))
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#define HORNER_12_(x, c, i) FMA(HORNER_11_(x, c, i + 1), x, c(i))
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#define HORNER_1(x, c) HORNER_1_ (x, c, 0)
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#define HORNER_2(x, c) HORNER_2_ (x, c, 0)
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#define HORNER_3(x, c) HORNER_3_ (x, c, 0)
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#define HORNER_4(x, c) HORNER_4_ (x, c, 0)
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#define HORNER_5(x, c) HORNER_5_ (x, c, 0)
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#define HORNER_6(x, c) HORNER_6_ (x, c, 0)
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#define HORNER_7(x, c) HORNER_7_ (x, c, 0)
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#define HORNER_8(x, c) HORNER_8_ (x, c, 0)
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#define HORNER_9(x, c) HORNER_9_ (x, c, 0)
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#define HORNER_10(x, c) HORNER_10_(x, c, 0)
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#define HORNER_11(x, c) HORNER_11_(x, c, 0)
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#define HORNER_12(x, c) HORNER_12_(x, c, 0)
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// clang-format on
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#endif /* COSMOPOLITAN_LIBC_TINYMATH_HORNER_WRAP_INTERNAL_H_ */
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