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Further optimize the math library

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The sincosf() function is now twice as fast, thanks to ARM Limited. The
same might also be true of logf() and expm1f() which have been updated.
This commit is contained in:
Justine Tunney 2023-04-28 01:17:28 -07:00
parent e8b43903b2
commit 420f889ac3
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GPG key ID: BE714B4575D6E328
22 changed files with 854 additions and 118 deletions
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39
libc/tinymath/horner_wrap.internal.h Normal file
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#ifndef COSMOPOLITAN_LIBC_TINYMATH_HORNER_WRAP_INTERNAL_H_
#define COSMOPOLITAN_LIBC_TINYMATH_HORNER_WRAP_INTERNAL_H_
/*
* Helper macros for Horner polynomial evaluation.
*
* Copyright (c) 2022-2023, Arm Limited.
* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
*/
// clang-format off
#define HORNER_1_(x, c, i) FMA(c(i + 1), x, c(i))
#define HORNER_2_(x, c, i) FMA(HORNER_1_ (x, c, i + 1), x, c(i))
#define HORNER_3_(x, c, i) FMA(HORNER_2_ (x, c, i + 1), x, c(i))
#define HORNER_4_(x, c, i) FMA(HORNER_3_ (x, c, i + 1), x, c(i))
#define HORNER_5_(x, c, i) FMA(HORNER_4_ (x, c, i + 1), x, c(i))
#define HORNER_6_(x, c, i) FMA(HORNER_5_ (x, c, i + 1), x, c(i))
#define HORNER_7_(x, c, i) FMA(HORNER_6_ (x, c, i + 1), x, c(i))
#define HORNER_8_(x, c, i) FMA(HORNER_7_ (x, c, i + 1), x, c(i))
#define HORNER_9_(x, c, i) FMA(HORNER_8_ (x, c, i + 1), x, c(i))
#define HORNER_10_(x, c, i) FMA(HORNER_9_ (x, c, i + 1), x, c(i))
#define HORNER_11_(x, c, i) FMA(HORNER_10_(x, c, i + 1), x, c(i))
#define HORNER_12_(x, c, i) FMA(HORNER_11_(x, c, i + 1), x, c(i))
#define HORNER_1(x, c) HORNER_1_ (x, c, 0)
#define HORNER_2(x, c) HORNER_2_ (x, c, 0)
#define HORNER_3(x, c) HORNER_3_ (x, c, 0)
#define HORNER_4(x, c) HORNER_4_ (x, c, 0)
#define HORNER_5(x, c) HORNER_5_ (x, c, 0)
#define HORNER_6(x, c) HORNER_6_ (x, c, 0)
#define HORNER_7(x, c) HORNER_7_ (x, c, 0)
#define HORNER_8(x, c) HORNER_8_ (x, c, 0)
#define HORNER_9(x, c) HORNER_9_ (x, c, 0)
#define HORNER_10(x, c) HORNER_10_(x, c, 0)
#define HORNER_11(x, c) HORNER_11_(x, c, 0)
#define HORNER_12(x, c) HORNER_12_(x, c, 0)
// clang-format on
#endif /* COSMOPOLITAN_LIBC_TINYMATH_HORNER_WRAP_INTERNAL_H_ */