201 lines
9.6 KiB
C
201 lines
9.6 KiB
C
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/* $NetBSD: aeabi.h,v 1.2 2012/08/11 16:21:26 matt Exp $ */
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ARM_AEABI_H_
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#define _ARM_AEABI_H_
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#include <stddef.h>
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#define __value_in_regs /* nothing */
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/*
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* Standard double precision floating-point arithmetic helper functions
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*/
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double __aeabi_dadd(double, double); // double-precision addition
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double __aeabi_ddiv(double n, double d); // double-precision division, n / d
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double __aeabi_dmul(double, double); // double-precision multiplication
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double __aeabi_drsub(double x, double y); // double-precision reverse subtraction, y - x
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double __aeabi_dsub(double x, double y); // double-precision subtraction, x - y
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double __aeabi_dneg(double); // double-precision negation (obsolete, to be removed in r2.09)
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/*
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* Double precision floating-point comparison helper functions
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*/
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void __aeabi_cdcmpeq(double, double); // non-excepting equality comparison [1], result in PSR ZC flags
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void __aeabi_cdcmple(double, double); // 3-way (<, =, >) compare [1], result in PSR ZC flags
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void __aeabi_cdrcmple(double, double); // reversed 3-way (<, =, >) compare [1], result in PSR ZC flags
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int __aeabi_dcmpeq(double, double); // result (1, 0) denotes (=, <>) [2], use for C == and !=
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int __aeabi_dcmplt(double, double); // result (1, 0) denotes (<, >=) [2], use for C <
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int __aeabi_dcmple(double, double); // result (1, 0) denotes (<=, >) [2], use for C <=
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int __aeabi_dcmpge(double, double); // result (1, 0) denotes (>=, <) [2], use for C >=
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int __aeabi_dcmpgt(double, double); // result (1, 0) denotes (>, <=) [2], use for C >
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int __aeabi_dcmpun(double, double); // result (1, 0) denotes (?, <=>) [2], use for C99 isunordered()
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/*
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* Standard single precision floating-point arithmetic helper functions
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*/
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float __aeabi_fadd(float, float); // single-precision addition
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float __aeabi_fdiv(float n, float d); // single-precision division, n / d
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float __aeabi_fmul(float, float); // single-precision multiplication
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float __aeabi_frsub(float x, float y); // single-precision reverse subtraction, y - x
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float __aeabi_fsub(float x, float y); // single-precision subtraction, x - y
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float __aeabi_fneg(float); // single-precision negation (obsolete, to be removed in r2.09)
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/*
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* Standard single precision floating-point comparison helper functions
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*/
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void __aeabi_cfcmpeq(float, float); // non-excepting equality comparison [1], result in PSR ZC flags
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void __aeabi_cfcmple(float, float); // 3-way (<, =, ?>) compare [1], result in PSR ZC flags
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void __aeabi_cfrcmple(float, float); // reversed 3-way (<, =, ?>) compare [1], result in PSR ZC flags
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int __aeabi_fcmpeq(float, float); // result (1, 0) denotes (=, <>) [2], use for C == and !=
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int __aeabi_fcmplt(float, float); // result (1, 0) denotes (<, >=) [2], use for C <
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int __aeabi_fcmple(float, float); // result (1, 0) denotes (<=, >) [2], use for C <=
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int __aeabi_fcmpge(float, float); // result (1, 0) denotes (>=, <) [2], use for C >=
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int __aeabi_fcmpgt(float, float); // result (1, 0) denotes (>, <=) [2], use for C >
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int __aeabi_fcmpun(float, float); // result (1, 0) denotes (?, <=>) [2], use for C99 isunordered()
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/*
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* Standard conversions between floating types
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*/
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float __aeabi_d2f(double); // double to float (single precision) conversion
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double __aeabi_f2d(float); // float (single precision) to double conversion
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float __aeabi_h2f(short hf); // IEEE 754 binary16 storage format (VFP half precision) to binary32 (float) conversion [4, 5]
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short __aeabi_f2h(float f); // IEEE 754 binary32 (float) to binary16 storage format (VFP half precision) conversion [4, 6]
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float __aeabi_h2f_alt(short hf); // __aeabi_h2f_alt converts from VFP alternative format [7].
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short __aeabi_f2h_alt(float f); // __aeabi_f2h_alt converts to VFP alternative format [8].
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/*
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* Standard floating-point to integer conversions
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*/
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int __aeabi_d2iz(double); // double to integer C-style conversion [3]
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unsigned __aeabi_d2uiz(double); // double to unsigned C-style conversion [3]
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long long __aeabi_d2lz(double); // double to long long C-style conversion [3]
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unsigned long long __aeabi_d2ulz(double); // double to unsigned long long C-style conversion [3]
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int __aeabi_f2iz(float); // float (single precision) to integer C-style conversion [3]
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unsigned __aeabi_f2uiz(float); // float (single precision) to unsigned C-style conversion [3]
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long long __aeabi_f2lz(float); // float (single precision) to long long C-style conversion [3]
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unsigned long long __aeabi_f2ulz(float); // float to unsigned long long C-style conversion [3]
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/*
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* Standard integer to floating-point conversions
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*/
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double __aeabi_i2d(int); // integer to double conversion
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double __aeabi_ui2d(unsigned); // unsigned to double conversion
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double __aeabi_l2d(long long); // long long to double conversion
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double __aeabi_ul2d(unsigned long long); // unsigned long long to double conversion
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float __aeabi_i2f(int); // integer to float (single precision) conversion
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float __aeabi_ui2f(unsigned); // unsigned to float (single precision) conversion
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float __aeabi_l2f(long long); // long long to float (single precision) conversion
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float __aeabi_ul2f(unsigned long long); // unsigned long long to float (single precision) conversion
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/*
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* Long long functions
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*/
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long long __aeabi_lmul(long long, long long); // multiplication
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/*
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* A pair of (unsigned) long longs is returned in {{r0, r1}, {r2, r3}},
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* the quotient in {r0, r1}, and the remainder in {r2, r3}.
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*/
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typedef struct { long long quot; long long rem; } lldiv_t;
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__value_in_regs lldiv_t __aeabi_ldivmod(long long n, long long d); // signed long long division and remainder, {q, r} = n / d [2]
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typedef struct { unsigned long long quot; unsigned long long rem; } ulldiv_t;
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__value_in_regs ulldiv_t __aeabi_uldivmod(unsigned long long n, unsigned long long d); // unsigned signed ll division, remainder, {q, r} = n / d [2]
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/*
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* Because of 2's complement number representation, these functions work
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* identically with long long replaced uniformly by unsigned long long.
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* Each returns its result in {r0, r1}, as specified by the [AAPCS].
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*/
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long long __aeabi_llsl(long long, int); // logical shift left [1]
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long long __aeabi_llsr(long long, int); // logical shift right [1]
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long long __aeabi_lasr(long long, int); // arithmetic shift right [1]
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/*
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* The comparison functions return negative, zero, or a positive integer
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* according to whether the comparison result is <, ==, or >, respectively
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* (like strcmp).
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*/
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int __aeabi_lcmp(long long, long long); // signed long long comparison
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int __aeabi_ulcmp(unsigned long long, unsigned long long); // unsigned long long comparison
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int __aeabi_idiv(int numerator, int denominator);
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unsigned __aeabi_uidiv(unsigned numerator, unsigned denominator);
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typedef struct { int quot, rem; } idiv_return;
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typedef struct { unsigned int quot, rem; } uidiv_return;
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__value_in_regs idiv_return __aeabi_idivmod(int, int);
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__value_in_regs uidiv_return __aeabi_uidivmod(unsigned int, unsigned int);
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/*
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* Division by zero
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*
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* If an integer or long long division helper function is called upon to
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* divide by 0, it should return as quotient the value returned by a call
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* to __aeabi_idiv0 or __aeabi_ldiv0, respectively. A *divmod helper should
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* return as remainder either 0 or the original numerator.
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*/
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int __aeabi_idiv0(int);
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long long __aeabi_ldiv0(long long);
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/*
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* These functions read and write 4-byte and 8-byte values at arbitrarily
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* aligned addresses. Write functions return the value written,
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* read functions the value read.
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*/
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int __aeabi_uread4(void *);
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int __aeabi_uwrite4(int, void *);
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long long __aeabi_uread8(void *);
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long long __aeabi_uwrite8(long long, void *);
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/*
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* Memory copying, clearing, and setting
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*/
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void __aeabi_memcpy8(void *, const void *, size_t);
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void __aeabi_memcpy4(void *, const void *, size_t);
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void __aeabi_memcpy(void *, const void *, size_t);
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void __aeabi_memmove8(void *, const void *, size_t);
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void __aeabi_memmove4(void *, const void *, size_t);
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void __aeabi_memmove(void *, const void *, size_t);
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/*
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* Memory clearing and setting
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*/
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void __aeabi_memset8(void *, size_t, int);
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void __aeabi_memset4(void *, size_t, int);
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void __aeabi_memset(void *, size_t, int);
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void __aeabi_memclr8(void *, size_t);
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void __aeabi_memclr4(void *, size_t);
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void __aeabi_memclr(void *, size_t);
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void *__aeabi_read_tp(void); // return the value of $tp
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#endif /* _ARM_AEABI_H_ */
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