| 1 | /* Configuration for libmvec routines. |
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| 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _VECMATH_CONFIG_H |
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| 20 | #define _VECMATH_CONFIG_H |
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| 21 | |
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| 22 | #include <math_private.h> |
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| 23 | |
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| 24 | /* Deprecated config option from Arm Optimized Routines which ensures |
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| 25 | fp exceptions are correctly triggered. This is not intended to be |
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| 26 | supported in GLIBC, however we keep it for ease of development. */ |
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| 27 | #define WANT_SIMD_EXCEPT 0 |
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| 28 | |
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| 29 | /* Return ptr but hide its value from the compiler so accesses through it |
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| 30 | cannot be optimized based on the contents. */ |
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| 31 | #define ptr_barrier(ptr) \ |
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| 32 | ({ \ |
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| 33 | __typeof (ptr) __ptr = (ptr); \ |
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| 34 | __asm("" : "+r"(__ptr)); \ |
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| 35 | __ptr; \ |
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| 36 | }) |
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| 37 | |
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| 38 | static inline uint64_t |
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| 39 | asuint64 (double f) |
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| 40 | { |
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| 41 | union |
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| 42 | { |
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| 43 | double f; |
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| 44 | uint64_t i; |
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| 45 | } u = { f }; |
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| 46 | return u.i; |
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| 47 | } |
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| 48 | |
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| 49 | #define V_LOG_POLY_ORDER 6 |
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| 50 | #define V_LOG_TABLE_BITS 7 |
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| 51 | extern const struct v_log_data |
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| 52 | { |
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| 53 | /* Shared data for vector log and log-derived routines (e.g. asinh). */ |
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| 54 | double poly[V_LOG_POLY_ORDER - 1]; |
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| 55 | double ln2; |
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| 56 | struct |
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| 57 | { |
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| 58 | double invc, logc; |
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| 59 | } table[1 << V_LOG_TABLE_BITS]; |
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| 60 | } __v_log_data attribute_hidden; |
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| 61 | |
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| 62 | #define V_EXP_TABLE_BITS 7 |
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| 63 | extern const uint64_t __v_exp_data[1 << V_EXP_TABLE_BITS] attribute_hidden; |
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| 64 | |
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| 65 | #define V_LOG2_TABLE_BITS 7 |
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| 66 | extern const struct v_log2_data |
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| 67 | { |
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| 68 | double poly[5]; |
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| 69 | double invln2; |
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| 70 | struct |
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| 71 | { |
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| 72 | double invc, log2c; |
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| 73 | } table[1 << V_LOG2_TABLE_BITS]; |
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| 74 | } __v_log2_data attribute_hidden; |
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| 75 | |
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| 76 | #define V_LOG10_TABLE_BITS 7 |
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| 77 | extern const struct v_log10_data |
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| 78 | { |
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| 79 | double poly[5]; |
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| 80 | double invln10, log10_2; |
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| 81 | struct |
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| 82 | { |
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| 83 | double invc, log10c; |
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| 84 | } table[1 << V_LOG10_TABLE_BITS]; |
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| 85 | } __v_log10_data attribute_hidden; |
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| 86 | |
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| 87 | #endif |
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| 88 | |
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