Szabolcs NagyandRich Felker
db505b794c
from https://github.com/ARM-software/optimized-routines, commit 04884bd04eac4b251da4026900010ea7d8850edc, with minor changes to better fit into musl. code size change: +289 bytes. benchmark on x86_64 before, after, speedup: -Os: logf rthruput: 8.40 ns/call 6.14 ns/call 1.37x logf latency: 31.79 ns/call 24.33 ns/call 1.31x -O3: logf rthruput: 8.43 ns/call 5.58 ns/call 1.51x logf latency: 32.04 ns/call 20.88 ns/call 1.53x
21 lines
406 B
C
21 lines
406 B
C
/*
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* Copyright (c) 2017-2018, Arm Limited.
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* SPDX-License-Identifier: MIT
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*/
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#ifndef _LOGF_DATA_H
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#define _LOGF_DATA_H
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#include <features.h>
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#define LOGF_TABLE_BITS 4
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#define LOGF_POLY_ORDER 4
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extern hidden const struct logf_data {
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struct {
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double invc, logc;
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} tab[1 << LOGF_TABLE_BITS];
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double ln2;
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double poly[LOGF_POLY_ORDER - 1]; /* First order coefficient is 1. */
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} __logf_data;
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#endif
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