861dc75906
The implementations use the x86_64 FPU instructions. These instructions are extremely slow compared to a polynomial based software implementation. Also, their accuracy falls drastically once the input goes beyond 2PI. To improve both the speed and accuracy, we will be taking the following approach going forward: 1. As a follow up to this CL, we will implement a range reduction algorithm which will expand the accuracy to the entire double precision range. 2. After that, we will replace the HW instructions with a polynomial implementation to improve the run time. After step 2, the implementations will be accurate, performant and target architecture independent. Reviewed By: lntue Differential Revision: https://reviews.llvm.org/D102384
19 lines
548 B
C++
19 lines
548 B
C++
//===-- Implementation header for sin ---------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_SRC_MATH_SIN_H
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#define LLVM_LIBC_SRC_MATH_SIN_H
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namespace __llvm_libc {
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double sin(double x);
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} // namespace __llvm_libc
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#endif // LLVM_LIBC_SRC_MATH_SIN_H
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