21 lines
445 B
Plaintext
21 lines
445 B
Plaintext
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// polynomial for approximating cbrt(x) in single precision
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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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deg = 3;
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a = 0.5;
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b = 1;
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f = x^(1/3);
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poly = fpminimax(f, deg, [|single ...|], [a;b]);
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display = hexadecimal;
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print("rel error:", accurateinfnorm(1-poly(x)/f(x), [a;b], 30));
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print("in [",a,b,"]");
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print("coeffs:");
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for i from 0 to deg do round(coeff(poly,i), SG, RN);
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