/* $NetBSD: aeabi.h,v 1.5 2013/08/01 22:20:40 matt Exp $ */ /*- * Copyright (c) 2012 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _ARM_AEABI_H_ #define _ARM_AEABI_H_ #if defined(_KERNEL) || defined(_STANDALONE) #include #else #include #endif #define __value_in_regs /* nothing */ #define __aapcs __attribute__((__pcs__("aapcs"))) /* * Standard double precision floating-point arithmetic helper functions */ double __aeabi_dadd(double, double) __aapcs; // double-precision addition double __aeabi_ddiv(double n, double d) __aapcs; // double-precision division, n / d double __aeabi_dmul(double, double) __aapcs; // double-precision multiplication double __aeabi_drsub(double x, double y) __aapcs; // double-precision reverse subtraction, y - x double __aeabi_dsub(double x, double y) __aapcs; // double-precision subtraction, x - y double __aeabi_dneg(double) __aapcs; // double-precision negation (obsolete, to be removed in r2.09) /* * Double precision floating-point comparison helper functions */ void __aeabi_cdcmpeq(double, double) __aapcs; // non-excepting equality comparison [1], result in PSR ZC flags void __aeabi_cdcmple(double, double) __aapcs; // 3-way (<, =, >) compare [1], result in PSR ZC flags void __aeabi_cdrcmple(double, double) __aapcs; // reversed 3-way (<, =, >) compare [1], result in PSR ZC flags int __aeabi_dcmpeq(double, double) __aapcs; // result (1, 0) denotes (=, <>) [2], use for C == and != int __aeabi_dcmplt(double, double) __aapcs; // result (1, 0) denotes (<, >=) [2], use for C < int __aeabi_dcmple(double, double) __aapcs; // result (1, 0) denotes (<=, >) [2], use for C <= int __aeabi_dcmpge(double, double) __aapcs; // result (1, 0) denotes (>=, <) [2], use for C >= int __aeabi_dcmpgt(double, double) __aapcs; // result (1, 0) denotes (>, <=) [2], use for C > int __aeabi_dcmpun(double, double) __aapcs; // result (1, 0) denotes (?, <=>) [2], use for C99 isunordered() /* * Standard single precision floating-point arithmetic helper functions */ float __aeabi_fadd(float, float) __aapcs; // single-precision addition float __aeabi_fdiv(float n, float d) __aapcs; // single-precision division, n / d float __aeabi_fmul(float, float) __aapcs; // single-precision multiplication float __aeabi_frsub(float x, float y) __aapcs; // single-precision reverse subtraction, y - x float __aeabi_fsub(float x, float y) __aapcs; // single-precision subtraction, x - y float __aeabi_fneg(float) __aapcs; // single-precision negation (obsolete, to be removed in r2.09) /* * Standard single precision floating-point comparison helper functions */ void __aeabi_cfcmpeq(float, float) __aapcs; // non-excepting equality comparison [1], result in PSR ZC flags void __aeabi_cfcmple(float, float) __aapcs; // 3-way (<, =, ?>) compare [1], result in PSR ZC flags void __aeabi_cfrcmple(float, float) __aapcs; // reversed 3-way (<, =, ?>) compare [1], result in PSR ZC flags int __aeabi_fcmpeq(float, float) __aapcs; // result (1, 0) denotes (=, <>) [2], use for C == and != int __aeabi_fcmplt(float, float) __aapcs; // result (1, 0) denotes (<, >=) [2], use for C < int __aeabi_fcmple(float, float) __aapcs; // result (1, 0) denotes (<=, >) [2], use for C <= int __aeabi_fcmpge(float, float) __aapcs; // result (1, 0) denotes (>=, <) [2], use for C >= int __aeabi_fcmpgt(float, float) __aapcs; // result (1, 0) denotes (>, <=) [2], use for C > int __aeabi_fcmpun(float, float) __aapcs; // result (1, 0) denotes (?, <=>) [2], use for C99 isunordered() /* * Standard conversions between floating types */ float __aeabi_d2f(double) __aapcs; // double to float (single precision) conversion double __aeabi_f2d(float) __aapcs; // float (single precision) to double conversion float __aeabi_h2f(short hf) __aapcs; // IEEE 754 binary16 storage format (VFP half precision) to binary32 (float) conversion [4, 5] short __aeabi_f2h(float f) __aapcs; // IEEE 754 binary32 (float) to binary16 storage format (VFP half precision) conversion [4, 6] float __aeabi_h2f_alt(short hf) __aapcs; // __aeabi_h2f_alt converts from VFP alternative format [7]. short __aeabi_f2h_alt(float f) __aapcs; // __aeabi_f2h_alt converts to VFP alternative format [8]. /* * Standard floating-point to integer conversions */ int __aeabi_d2iz(double) __aapcs; // double to integer C-style conversion [3] unsigned __aeabi_d2uiz(double) __aapcs; // double to unsigned C-style conversion [3] long long __aeabi_d2lz(double) __aapcs; // double to long long C-style conversion [3] unsigned long long __aeabi_d2ulz(double) __aapcs; // double to unsigned long long C-style conversion [3] int __aeabi_f2iz(float) __aapcs; // float (single precision) to integer C-style conversion [3] unsigned __aeabi_f2uiz(float) __aapcs; // float (single precision) to unsigned C-style conversion [3] long long __aeabi_f2lz(float) __aapcs; // float (single precision) to long long C-style conversion [3] unsigned long long __aeabi_f2ulz(float) __aapcs; // float to unsigned long long C-style conversion [3] /* * Standard integer to floating-point conversions */ double __aeabi_i2d(int) __aapcs; // integer to double conversion double __aeabi_ui2d(unsigned) __aapcs; // unsigned to double conversion double __aeabi_l2d(long long) __aapcs; // long long to double conversion double __aeabi_ul2d(unsigned long long) __aapcs; // unsigned long long to double conversion float __aeabi_i2f(int) __aapcs; // integer to float (single precision) conversion float __aeabi_ui2f(unsigned) __aapcs; // unsigned to float (single precision) conversion float __aeabi_l2f(long long) __aapcs; // long long to float (single precision) conversion float __aeabi_ul2f(unsigned long long) __aapcs; // unsigned long long to float (single precision) conversion /* * Long long functions */ long long __aeabi_lmul(long long, long long); // multiplication /* * A pair of (unsigned) long longs is returned in {{r0, r1}, {r2, r3}}, * the quotient in {r0, r1}, and the remainder in {r2, r3}. */ typedef struct { long long quot; long long rem; } lldiv_t; __value_in_regs lldiv_t __aeabi_ldivmod(long long n, long long d); // signed long long division and remainder, {q, r} = n / d [2] typedef struct { unsigned long long quot; unsigned long long rem; } ulldiv_t; __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] /* * Because of 2's complement number representation, these functions work * identically with long long replaced uniformly by unsigned long long. * Each returns its result in {r0, r1}, as specified by the [AAPCS]. */ long long __aeabi_llsl(long long, int); // logical shift left [1] long long __aeabi_llsr(long long, int); // logical shift right [1] long long __aeabi_lasr(long long, int); // arithmetic shift right [1] /* * The comparison functions return negative, zero, or a positive integer * according to whether the comparison result is <, ==, or >, respectively * (like strcmp). */ int __aeabi_lcmp(long long, long long); // signed long long comparison int __aeabi_ulcmp(unsigned long long, unsigned long long); // unsigned long long comparison int __aeabi_idiv(int numerator, int denominator); unsigned __aeabi_uidiv(unsigned numerator, unsigned denominator); typedef struct { int quot, rem; } idiv_return; typedef struct { unsigned int quot, rem; } uidiv_return; __value_in_regs idiv_return __aeabi_idivmod(int, int); __value_in_regs uidiv_return __aeabi_uidivmod(unsigned int, unsigned int); /* * Division by zero * * If an integer or long long division helper function is called upon to * divide by 0, it should return as quotient the value returned by a call * to __aeabi_idiv0 or __aeabi_ldiv0, respectively. A *divmod helper should * return as remainder either 0 or the original numerator. */ int __aeabi_idiv0(int); long long __aeabi_ldiv0(long long); /* * These functions read and write 4-byte and 8-byte values at arbitrarily * aligned addresses. Write functions return the value written, * read functions the value read. */ int __aeabi_uread4(void *); int __aeabi_uwrite4(int, void *); long long __aeabi_uread8(void *); long long __aeabi_uwrite8(long long, void *); /* * Memory copying, clearing, and setting */ void __aeabi_memcpy8(void *, const void *, size_t); void __aeabi_memcpy4(void *, const void *, size_t); void __aeabi_memcpy(void *, const void *, size_t); void __aeabi_memmove8(void *, const void *, size_t); void __aeabi_memmove4(void *, const void *, size_t); void __aeabi_memmove(void *, const void *, size_t); /* * Memory clearing and setting */ void __aeabi_memset8(void *, size_t, int); void __aeabi_memset4(void *, size_t, int); void __aeabi_memset(void *, size_t, int); void __aeabi_memclr8(void *, size_t); void __aeabi_memclr4(void *, size_t); void __aeabi_memclr(void *, size_t); void *__aeabi_read_tp(void); // return the value of $tp #undef __aapcs #endif /* _ARM_AEABI_H_ */