1 /* $NetBSD: aeabi.h,v 1.6 2021/10/06 05:33:15 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #ifndef _ARM_AEABI_H_ 32 #define _ARM_AEABI_H_ 33 34 #if defined(_KERNEL) || defined(_STANDALONE) 35 #include <sys/types.h> 36 #else 37 #include <stddef.h> 38 #endif 39 40 #define __value_in_regs /* nothing */ 41 #define __aapcs __attribute__((__pcs__("aapcs"))) 42 43 /* 44 * Standard double precision floating-point arithmetic helper functions 45 */ 46 double __aeabi_dadd(double, double) __aapcs; // double-precision addition 47 double __aeabi_ddiv(double n, double d) __aapcs; // double-precision division, n / d 48 double __aeabi_dmul(double, double) __aapcs; // double-precision multiplication 49 double __aeabi_drsub(double x, double y) __aapcs; // double-precision reverse subtraction, y - x 50 double __aeabi_dsub(double x, double y) __aapcs; // double-precision subtraction, x - y 51 double __aeabi_dneg(double) __aapcs; // double-precision negation (obsolete, to be removed in r2.09) 52 53 /* 54 * Double precision floating-point comparison helper functions 55 */ 56 void __aeabi_cdcmpeq(double, double) __aapcs; // non-excepting equality comparison [1], result in PSR ZC flags 57 void __aeabi_cdcmple(double, double) __aapcs; // 3-way (<, =, >) compare [1], result in PSR ZC flags 58 void __aeabi_cdrcmple(double, double) __aapcs; // reversed 3-way (<, =, >) compare [1], result in PSR ZC flags 59 int __aeabi_dcmpeq(double, double) __aapcs; // result (1, 0) denotes (=, <>) [2], use for C == and != 60 int __aeabi_dcmplt(double, double) __aapcs; // result (1, 0) denotes (<, >=) [2], use for C < 61 int __aeabi_dcmple(double, double) __aapcs; // result (1, 0) denotes (<=, >) [2], use for C <= 62 int __aeabi_dcmpge(double, double) __aapcs; // result (1, 0) denotes (>=, <) [2], use for C >= 63 int __aeabi_dcmpgt(double, double) __aapcs; // result (1, 0) denotes (>, <=) [2], use for C > 64 int __aeabi_dcmpun(double, double) __aapcs; // result (1, 0) denotes (?, <=>) [2], use for C99 isunordered() 65 66 /* 67 * Standard single precision floating-point arithmetic helper functions 68 */ 69 float __aeabi_fadd(float, float) __aapcs; // single-precision addition 70 float __aeabi_fdiv(float n, float d) __aapcs; // single-precision division, n / d 71 float __aeabi_fmul(float, float) __aapcs; // single-precision multiplication 72 float __aeabi_frsub(float x, float y) __aapcs; // single-precision reverse subtraction, y - x 73 float __aeabi_fsub(float x, float y) __aapcs; // single-precision subtraction, x - y 74 float __aeabi_fneg(float) __aapcs; // single-precision negation (obsolete, to be removed in r2.09) 75 76 /* 77 * Standard single precision floating-point comparison helper functions 78 */ 79 void __aeabi_cfcmpeq(float, float) __aapcs; // non-excepting equality comparison [1], result in PSR ZC flags 80 void __aeabi_cfcmple(float, float) __aapcs; // 3-way (<, =, ?>) compare [1], result in PSR ZC flags 81 void __aeabi_cfrcmple(float, float) __aapcs; // reversed 3-way (<, =, ?>) compare [1], result in PSR ZC flags 82 int __aeabi_fcmpeq(float, float) __aapcs; // result (1, 0) denotes (=, <>) [2], use for C == and != 83 int __aeabi_fcmplt(float, float) __aapcs; // result (1, 0) denotes (<, >=) [2], use for C < 84 int __aeabi_fcmple(float, float) __aapcs; // result (1, 0) denotes (<=, >) [2], use for C <= 85 int __aeabi_fcmpge(float, float) __aapcs; // result (1, 0) denotes (>=, <) [2], use for C >= 86 int __aeabi_fcmpgt(float, float) __aapcs; // result (1, 0) denotes (>, <=) [2], use for C > 87 int __aeabi_fcmpun(float, float) __aapcs; // result (1, 0) denotes (?, <=>) [2], use for C99 isunordered() 88 89 /* 90 * Standard conversions between floating types 91 */ 92 float __aeabi_d2f(double) __aapcs; // double to float (single precision) conversion 93 double __aeabi_f2d(float) __aapcs; // float (single precision) to double conversion 94 float __aeabi_h2f(short hf) __aapcs; // IEEE 754 binary16 storage format (VFP half precision) to binary32 (float) conversion [4, 5] 95 short __aeabi_f2h(float f) __aapcs; // IEEE 754 binary32 (float) to binary16 storage format (VFP half precision) conversion [4, 6] 96 float __aeabi_h2f_alt(short hf) __aapcs; // __aeabi_h2f_alt converts from VFP alternative format [7]. 97 short __aeabi_f2h_alt(float f) __aapcs; // __aeabi_f2h_alt converts to VFP alternative format [8]. 98 99 /* 100 * Standard floating-point to integer conversions 101 */ 102 int __aeabi_d2iz(double) __aapcs; // double to integer C-style conversion [3] 103 unsigned __aeabi_d2uiz(double) __aapcs; // double to unsigned C-style conversion [3] 104 long long __aeabi_d2lz(double) __aapcs; // double to long long C-style conversion [3] 105 unsigned long long __aeabi_d2ulz(double) __aapcs; // double to unsigned long long C-style conversion [3] 106 int __aeabi_f2iz(float) __aapcs; // float (single precision) to integer C-style conversion [3] 107 unsigned __aeabi_f2uiz(float) __aapcs; // float (single precision) to unsigned C-style conversion [3] 108 long long __aeabi_f2lz(float) __aapcs; // float (single precision) to long long C-style conversion [3] 109 unsigned long long __aeabi_f2ulz(float) __aapcs; // float to unsigned long long C-style conversion [3] 110 111 /* 112 * Standard integer to floating-point conversions 113 */ 114 double __aeabi_i2d(int) __aapcs; // integer to double conversion 115 double __aeabi_ui2d(unsigned) __aapcs; // unsigned to double conversion 116 double __aeabi_l2d(long long) __aapcs; // long long to double conversion 117 double __aeabi_ul2d(unsigned long long) __aapcs; // unsigned long long to double conversion 118 float __aeabi_i2f(int) __aapcs; // integer to float (single precision) conversion 119 float __aeabi_ui2f(unsigned) __aapcs; // unsigned to float (single precision) conversion 120 float __aeabi_l2f(long long) __aapcs; // long long to float (single precision) conversion 121 float __aeabi_ul2f(unsigned long long) __aapcs; // unsigned long long to float (single precision) conversion 122 123 /* 124 * Long long functions 125 */ 126 long long __aeabi_lmul(long long, long long); // multiplication 127 128 /* 129 * A pair of (unsigned) long longs is returned in {{r0, r1}, {r2, r3}}, 130 * the quotient in {r0, r1}, and the remainder in {r2, r3}. 131 */ 132 typedef struct { long long quot; long long rem; } lldiv_t; 133 __value_in_regs lldiv_t __aeabi_ldivmod(long long n, long long d); // signed long long division and remainder, {q, r} = n / d [2] 134 135 typedef struct { unsigned long long quot; unsigned long long rem; } ulldiv_t; 136 __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] 137 138 /* 139 * Because of 2's complement number representation, these functions work 140 * identically with long long replaced uniformly by unsigned long long. 141 * Each returns its result in {r0, r1}, as specified by the [AAPCS]. 142 */ 143 long long __aeabi_llsl(long long, int); // logical shift left [1] 144 long long __aeabi_llsr(long long, int); // logical shift right [1] 145 long long __aeabi_lasr(long long, int); // arithmetic shift right [1] 146 147 /* 148 * The comparison functions return negative, zero, or a positive integer 149 * according to whether the comparison result is <, ==, or >, respectively 150 * (like strcmp). 151 */ 152 int __aeabi_lcmp(long long, long long); // signed long long comparison 153 int __aeabi_ulcmp(unsigned long long, unsigned long long); // unsigned long long comparison 154 155 int __aeabi_idiv(int numerator, int denominator); 156 unsigned __aeabi_uidiv(unsigned numerator, unsigned denominator); 157 typedef struct { int quot, rem; } idiv_return; 158 typedef struct { unsigned int quot, rem; } uidiv_return; 159 __value_in_regs idiv_return __aeabi_idivmod(int, int); 160 __value_in_regs uidiv_return __aeabi_uidivmod(unsigned int, unsigned int); 161 162 /* 163 * Division by zero 164 * 165 * If an integer or long long division helper function is called upon to 166 * divide by 0, it should return as quotient the value returned by a call 167 * to __aeabi_idiv0 or __aeabi_ldiv0, respectively. A *divmod helper should 168 * return as remainder either 0 or the original numerator. 169 */ 170 int __aeabi_idiv0(int); 171 long long __aeabi_ldiv0(long long); 172 173 /* 174 * These functions read and write 4-byte and 8-byte values at arbitrarily 175 * aligned addresses. Write functions return the value written, 176 * read functions the value read. 177 */ 178 int __aeabi_uread4(void *); 179 int __aeabi_uwrite4(int, void *); 180 long long __aeabi_uread8(void *); 181 long long __aeabi_uwrite8(long long, void *); 182 183 /* 184 * Memory copying, clearing, and setting 185 */ 186 void __aeabi_memcpy8(void *, const void *, size_t); 187 void __aeabi_memcpy4(void *, const void *, size_t); 188 void __aeabi_memcpy(void *, const void *, size_t); 189 void __aeabi_memmove8(void *, const void *, size_t); 190 void __aeabi_memmove4(void *, const void *, size_t); 191 void __aeabi_memmove(void *, const void *, size_t); 192 193 /* 194 * Memory clearing and setting 195 */ 196 void __aeabi_memset8(void *, size_t, int); 197 void __aeabi_memset4(void *, size_t, int); 198 void __aeabi_memset(void *, size_t, int); 199 void __aeabi_memclr8(void *, size_t); 200 void __aeabi_memclr4(void *, size_t); 201 void __aeabi_memclr(void *, size_t); 202 203 void *__aeabi_read_tp(void); // return the value of $tp 204 205 #undef __aapcs 206 207 #endif /* _ARM_AEABI_H_ */ 208
Indexes created Sat Sep 20 22:09:52 GMT 2025