Root/
| Source at commit 1270 created 12 years 8 months ago. By meklort, Add arm headers. update makefiles | |
|---|---|
| 1 | /*␊ |
| 2 | * Copyright (c) 1999-2007 Apple Inc. All rights reserved.␊ |
| 3 | */␊ |
| 4 | ␊ |
| 5 | #ifndef _OS_OSBYTEORDERARM_H␊ |
| 6 | #define _OS_OSBYTEORDERARM_H␊ |
| 7 | ␊ |
| 8 | #include <stdint.h>␊ |
| 9 | #include <arm/arch.h> /* for _ARM_ARCH_6 */␊ |
| 10 | ␊ |
| 11 | #if !defined(OS_INLINE)␊ |
| 12 | # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L␊ |
| 13 | # define OS_INLINE static inline␊ |
| 14 | # else␊ |
| 15 | # define OS_INLINE static __inline__␊ |
| 16 | # endif␊ |
| 17 | #endif␊ |
| 18 | ␊ |
| 19 | /* Generic byte swapping functions. */␊ |
| 20 | ␊ |
| 21 | OS_INLINE␊ |
| 22 | uint16_t␊ |
| 23 | _OSSwapInt16(␊ |
| 24 | uint16_t data␊ |
| 25 | )␊ |
| 26 | {␊ |
| 27 | #if defined(__llvm__)␊ |
| 28 | data = (data << 8 | data >> 8);␊ |
| 29 | #elif defined(_ARM_ARCH_6)␊ |
| 30 | __asm__ ("rev16 %0, %1\n" : "=l" (data) : "l" (data));␊ |
| 31 | #else␊ |
| 32 | data = (data << 8 | data >> 8);␊ |
| 33 | #endif␊ |
| 34 | ␊ |
| 35 | return data;␊ |
| 36 | }␊ |
| 37 | ␊ |
| 38 | OS_INLINE␊ |
| 39 | uint32_t␊ |
| 40 | _OSSwapInt32(␊ |
| 41 | uint32_t data␊ |
| 42 | )␊ |
| 43 | {␊ |
| 44 | #if defined(__llvm__)␊ |
| 45 | data = __builtin_bswap32(data);␊ |
| 46 | #elif defined(_ARM_ARCH_6)␊ |
| 47 | __asm__ ("rev %0, %1\n" : "=l" (data) : "l" (data));␊ |
| 48 | #else␊ |
| 49 | /* This actually generates the best code */␊ |
| 50 | data = (((data ^ (data >> 16 | (data << 16))) & 0xFF00FFFF) >> 8) ^ (data >> 8 | data << 24);␊ |
| 51 | #endif␊ |
| 52 | ␊ |
| 53 | return data;␊ |
| 54 | }␊ |
| 55 | ␊ |
| 56 | OS_INLINE␊ |
| 57 | uint64_t␊ |
| 58 | _OSSwapInt64(␊ |
| 59 | uint64_t data␊ |
| 60 | )␊ |
| 61 | {␊ |
| 62 | #if defined(__llvm__)␊ |
| 63 | return __builtin_bswap64(data);␊ |
| 64 | #else␊ |
| 65 | union {␊ |
| 66 | uint64_t ull;␊ |
| 67 | uint32_t ul[2];␊ |
| 68 | } u;␊ |
| 69 | ␊ |
| 70 | /* This actually generates the best code */␊ |
| 71 | u.ul[0] = (uint32_t)(data >> 32);␊ |
| 72 | u.ul[1] = (uint32_t)(data & 0xffffffff);␊ |
| 73 | u.ul[0] = _OSSwapInt32(u.ul[0]);␊ |
| 74 | u.ul[1] = _OSSwapInt32(u.ul[1]);␊ |
| 75 | return u.ull;␊ |
| 76 | #endif␊ |
| 77 | }␊ |
| 78 | ␊ |
| 79 | /* Functions for byte reversed loads. */␊ |
| 80 | ␊ |
| 81 | OS_INLINE␊ |
| 82 | uint16_t␊ |
| 83 | OSReadSwapInt16(␊ |
| 84 | const volatile void * base,␊ |
| 85 | uintptr_t offset␊ |
| 86 | )␊ |
| 87 | {␊ |
| 88 | uint16_t result;␊ |
| 89 | ␊ |
| 90 | result = *(volatile uint16_t *)((volatile uintptr_t)base + offset);␊ |
| 91 | return _OSSwapInt16(result);␊ |
| 92 | }␊ |
| 93 | ␊ |
| 94 | OS_INLINE␊ |
| 95 | uint32_t␊ |
| 96 | OSReadSwapInt32(␊ |
| 97 | const volatile void * base,␊ |
| 98 | uintptr_t offset␊ |
| 99 | )␊ |
| 100 | {␊ |
| 101 | uint32_t result;␊ |
| 102 | ␊ |
| 103 | result = *(volatile uint32_t *)((volatile uintptr_t)base + offset);␊ |
| 104 | return _OSSwapInt32(result);␊ |
| 105 | }␊ |
| 106 | ␊ |
| 107 | OS_INLINE␊ |
| 108 | uint64_t␊ |
| 109 | OSReadSwapInt64(␊ |
| 110 | const volatile void * base,␊ |
| 111 | uintptr_t offset␊ |
| 112 | )␊ |
| 113 | {␊ |
| 114 | volatile uint32_t * inp;␊ |
| 115 | union ullc {␊ |
| 116 | uint64_t ull;␊ |
| 117 | uint32_t ul[2];␊ |
| 118 | } outv;␊ |
| 119 | ␊ |
| 120 | inp = (volatile uint32_t *)((volatile uintptr_t)base + offset);␊ |
| 121 | outv.ul[0] = inp[1];␊ |
| 122 | outv.ul[1] = inp[0];␊ |
| 123 | outv.ul[0] = _OSSwapInt32(outv.ul[0]);␊ |
| 124 | outv.ul[1] = _OSSwapInt32(outv.ul[1]);␊ |
| 125 | return outv.ull;␊ |
| 126 | }␊ |
| 127 | ␊ |
| 128 | /* Functions for byte reversed stores. */␊ |
| 129 | ␊ |
| 130 | OS_INLINE␊ |
| 131 | void␊ |
| 132 | OSWriteSwapInt16(␊ |
| 133 | volatile void * base,␊ |
| 134 | uintptr_t offset,␊ |
| 135 | uint16_t data␊ |
| 136 | )␊ |
| 137 | {␊ |
| 138 | *(volatile uint16_t *)((volatile uintptr_t)base + offset) = _OSSwapInt16(data);␊ |
| 139 | }␊ |
| 140 | ␊ |
| 141 | OS_INLINE␊ |
| 142 | void␊ |
| 143 | OSWriteSwapInt32(␊ |
| 144 | volatile void * base,␊ |
| 145 | uintptr_t offset,␊ |
| 146 | uint32_t data␊ |
| 147 | )␊ |
| 148 | {␊ |
| 149 | *(volatile uint32_t *)((volatile uintptr_t)base + offset) = _OSSwapInt32(data);␊ |
| 150 | }␊ |
| 151 | ␊ |
| 152 | OS_INLINE␊ |
| 153 | void␊ |
| 154 | OSWriteSwapInt64(␊ |
| 155 | volatile void * base,␊ |
| 156 | uintptr_t offset,␊ |
| 157 | uint64_t data␊ |
| 158 | )␊ |
| 159 | {␊ |
| 160 | *(volatile uint64_t *)((volatile uintptr_t)base + offset) = _OSSwapInt64(data);␊ |
| 161 | }␊ |
| 162 | ␊ |
| 163 | #endif /* ! _OS_OSBYTEORDERARM_H */␊ |
| 164 | |
