Ley Foon Tan | 39b505c | 2014-11-06 15:19:36 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Macro used to simplify coding multi-line assembler. |
| 3 | * Some of the bit test macro can simplify down to one line |
| 4 | * depending on the mask value. |
| 5 | * |
| 6 | * Copyright (C) 2004 Microtronix Datacom Ltd. |
| 7 | * |
| 8 | * All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 18 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 19 | * details. |
| 20 | * |
| 21 | */ |
| 22 | #ifndef _ASM_NIOS2_ASMMACROS_H |
| 23 | #define _ASM_NIOS2_ASMMACROS_H |
| 24 | /* |
| 25 | * ANDs reg2 with mask and places the result in reg1. |
| 26 | * |
| 27 | * You cannnot use the same register for reg1 & reg2. |
| 28 | */ |
| 29 | |
| 30 | .macro ANDI32 reg1, reg2, mask |
| 31 | .if \mask & 0xffff |
| 32 | .if \mask & 0xffff0000 |
| 33 | movhi \reg1, %hi(\mask) |
| 34 | movui \reg1, %lo(\mask) |
| 35 | and \reg1, \reg1, \reg2 |
| 36 | .else |
| 37 | andi \reg1, \reg2, %lo(\mask) |
| 38 | .endif |
| 39 | .else |
| 40 | andhi \reg1, \reg2, %hi(\mask) |
| 41 | .endif |
| 42 | .endm |
| 43 | |
| 44 | /* |
| 45 | * ORs reg2 with mask and places the result in reg1. |
| 46 | * |
| 47 | * It is safe to use the same register for reg1 & reg2. |
| 48 | */ |
| 49 | |
| 50 | .macro ORI32 reg1, reg2, mask |
| 51 | .if \mask & 0xffff |
| 52 | .if \mask & 0xffff0000 |
| 53 | orhi \reg1, \reg2, %hi(\mask) |
| 54 | ori \reg1, \reg2, %lo(\mask) |
| 55 | .else |
| 56 | ori \reg1, \reg2, %lo(\mask) |
| 57 | .endif |
| 58 | .else |
| 59 | orhi \reg1, \reg2, %hi(\mask) |
| 60 | .endif |
| 61 | .endm |
| 62 | |
| 63 | /* |
| 64 | * XORs reg2 with mask and places the result in reg1. |
| 65 | * |
| 66 | * It is safe to use the same register for reg1 & reg2. |
| 67 | */ |
| 68 | |
| 69 | .macro XORI32 reg1, reg2, mask |
| 70 | .if \mask & 0xffff |
| 71 | .if \mask & 0xffff0000 |
| 72 | xorhi \reg1, \reg2, %hi(\mask) |
| 73 | xori \reg1, \reg1, %lo(\mask) |
| 74 | .else |
| 75 | xori \reg1, \reg2, %lo(\mask) |
| 76 | .endif |
| 77 | .else |
| 78 | xorhi \reg1, \reg2, %hi(\mask) |
| 79 | .endif |
| 80 | .endm |
| 81 | |
| 82 | /* |
| 83 | * This is a support macro for BTBZ & BTBNZ. It checks |
| 84 | * the bit to make sure it is valid 32 value. |
| 85 | * |
| 86 | * It is safe to use the same register for reg1 & reg2. |
| 87 | */ |
| 88 | |
| 89 | .macro BT reg1, reg2, bit |
| 90 | .if \bit > 31 |
| 91 | .err |
| 92 | .else |
| 93 | .if \bit < 16 |
| 94 | andi \reg1, \reg2, (1 << \bit) |
| 95 | .else |
| 96 | andhi \reg1, \reg2, (1 << (\bit - 16)) |
| 97 | .endif |
| 98 | .endif |
| 99 | .endm |
| 100 | |
| 101 | /* |
| 102 | * Tests the bit in reg2 and branches to label if the |
| 103 | * bit is zero. The result of the bit test is stored in reg1. |
| 104 | * |
| 105 | * It is safe to use the same register for reg1 & reg2. |
| 106 | */ |
| 107 | |
| 108 | .macro BTBZ reg1, reg2, bit, label |
| 109 | BT \reg1, \reg2, \bit |
| 110 | beq \reg1, r0, \label |
| 111 | .endm |
| 112 | |
| 113 | /* |
| 114 | * Tests the bit in reg2 and branches to label if the |
| 115 | * bit is non-zero. The result of the bit test is stored in reg1. |
| 116 | * |
| 117 | * It is safe to use the same register for reg1 & reg2. |
| 118 | */ |
| 119 | |
| 120 | .macro BTBNZ reg1, reg2, bit, label |
| 121 | BT \reg1, \reg2, \bit |
| 122 | bne \reg1, r0, \label |
| 123 | .endm |
| 124 | |
| 125 | /* |
| 126 | * Tests the bit in reg2 and then compliments the bit in reg2. |
| 127 | * The result of the bit test is stored in reg1. |
| 128 | * |
| 129 | * It is NOT safe to use the same register for reg1 & reg2. |
| 130 | */ |
| 131 | |
| 132 | .macro BTC reg1, reg2, bit |
| 133 | .if \bit > 31 |
| 134 | .err |
| 135 | .else |
| 136 | .if \bit < 16 |
| 137 | andi \reg1, \reg2, (1 << \bit) |
| 138 | xori \reg2, \reg2, (1 << \bit) |
| 139 | .else |
| 140 | andhi \reg1, \reg2, (1 << (\bit - 16)) |
| 141 | xorhi \reg2, \reg2, (1 << (\bit - 16)) |
| 142 | .endif |
| 143 | .endif |
| 144 | .endm |
| 145 | |
| 146 | /* |
| 147 | * Tests the bit in reg2 and then sets the bit in reg2. |
| 148 | * The result of the bit test is stored in reg1. |
| 149 | * |
| 150 | * It is NOT safe to use the same register for reg1 & reg2. |
| 151 | */ |
| 152 | |
| 153 | .macro BTS reg1, reg2, bit |
| 154 | .if \bit > 31 |
| 155 | .err |
| 156 | .else |
| 157 | .if \bit < 16 |
| 158 | andi \reg1, \reg2, (1 << \bit) |
| 159 | ori \reg2, \reg2, (1 << \bit) |
| 160 | .else |
| 161 | andhi \reg1, \reg2, (1 << (\bit - 16)) |
| 162 | orhi \reg2, \reg2, (1 << (\bit - 16)) |
| 163 | .endif |
| 164 | .endif |
| 165 | .endm |
| 166 | |
| 167 | /* |
| 168 | * Tests the bit in reg2 and then resets the bit in reg2. |
| 169 | * The result of the bit test is stored in reg1. |
| 170 | * |
| 171 | * It is NOT safe to use the same register for reg1 & reg2. |
| 172 | */ |
| 173 | |
| 174 | .macro BTR reg1, reg2, bit |
| 175 | .if \bit > 31 |
| 176 | .err |
| 177 | .else |
| 178 | .if \bit < 16 |
| 179 | andi \reg1, \reg2, (1 << \bit) |
| 180 | andi \reg2, \reg2, %lo(~(1 << \bit)) |
| 181 | .else |
| 182 | andhi \reg1, \reg2, (1 << (\bit - 16)) |
| 183 | andhi \reg2, \reg2, %lo(~(1 << (\bit - 16))) |
| 184 | .endif |
| 185 | .endif |
| 186 | .endm |
| 187 | |
| 188 | /* |
| 189 | * Tests the bit in reg2 and then compliments the bit in reg2. |
| 190 | * The result of the bit test is stored in reg1. If the |
| 191 | * original bit was zero it branches to label. |
| 192 | * |
| 193 | * It is NOT safe to use the same register for reg1 & reg2. |
| 194 | */ |
| 195 | |
| 196 | .macro BTCBZ reg1, reg2, bit, label |
| 197 | BTC \reg1, \reg2, \bit |
| 198 | beq \reg1, r0, \label |
| 199 | .endm |
| 200 | |
| 201 | /* |
| 202 | * Tests the bit in reg2 and then compliments the bit in reg2. |
| 203 | * The result of the bit test is stored in reg1. If the |
| 204 | * original bit was non-zero it branches to label. |
| 205 | * |
| 206 | * It is NOT safe to use the same register for reg1 & reg2. |
| 207 | */ |
| 208 | |
| 209 | .macro BTCBNZ reg1, reg2, bit, label |
| 210 | BTC \reg1, \reg2, \bit |
| 211 | bne \reg1, r0, \label |
| 212 | .endm |
| 213 | |
| 214 | /* |
| 215 | * Tests the bit in reg2 and then sets the bit in reg2. |
| 216 | * The result of the bit test is stored in reg1. If the |
| 217 | * original bit was zero it branches to label. |
| 218 | * |
| 219 | * It is NOT safe to use the same register for reg1 & reg2. |
| 220 | */ |
| 221 | |
| 222 | .macro BTSBZ reg1, reg2, bit, label |
| 223 | BTS \reg1, \reg2, \bit |
| 224 | beq \reg1, r0, \label |
| 225 | .endm |
| 226 | |
| 227 | /* |
| 228 | * Tests the bit in reg2 and then sets the bit in reg2. |
| 229 | * The result of the bit test is stored in reg1. If the |
| 230 | * original bit was non-zero it branches to label. |
| 231 | * |
| 232 | * It is NOT safe to use the same register for reg1 & reg2. |
| 233 | */ |
| 234 | |
| 235 | .macro BTSBNZ reg1, reg2, bit, label |
| 236 | BTS \reg1, \reg2, \bit |
| 237 | bne \reg1, r0, \label |
| 238 | .endm |
| 239 | |
| 240 | /* |
| 241 | * Tests the bit in reg2 and then resets the bit in reg2. |
| 242 | * The result of the bit test is stored in reg1. If the |
| 243 | * original bit was zero it branches to label. |
| 244 | * |
| 245 | * It is NOT safe to use the same register for reg1 & reg2. |
| 246 | */ |
| 247 | |
| 248 | .macro BTRBZ reg1, reg2, bit, label |
| 249 | BTR \reg1, \reg2, \bit |
| 250 | bne \reg1, r0, \label |
| 251 | .endm |
| 252 | |
| 253 | /* |
| 254 | * Tests the bit in reg2 and then resets the bit in reg2. |
| 255 | * The result of the bit test is stored in reg1. If the |
| 256 | * original bit was non-zero it branches to label. |
| 257 | * |
| 258 | * It is NOT safe to use the same register for reg1 & reg2. |
| 259 | */ |
| 260 | |
| 261 | .macro BTRBNZ reg1, reg2, bit, label |
| 262 | BTR \reg1, \reg2, \bit |
| 263 | bne \reg1, r0, \label |
| 264 | .endm |
| 265 | |
| 266 | /* |
| 267 | * Tests the bits in mask against reg2 stores the result in reg1. |
| 268 | * If the all the bits in the mask are zero it branches to label. |
| 269 | * |
| 270 | * It is safe to use the same register for reg1 & reg2. |
| 271 | */ |
| 272 | |
| 273 | .macro TSTBZ reg1, reg2, mask, label |
| 274 | ANDI32 \reg1, \reg2, \mask |
| 275 | beq \reg1, r0, \label |
| 276 | .endm |
| 277 | |
| 278 | /* |
| 279 | * Tests the bits in mask against reg2 stores the result in reg1. |
| 280 | * If the any of the bits in the mask are 1 it branches to label. |
| 281 | * |
| 282 | * It is safe to use the same register for reg1 & reg2. |
| 283 | */ |
| 284 | |
| 285 | .macro TSTBNZ reg1, reg2, mask, label |
| 286 | ANDI32 \reg1, \reg2, \mask |
| 287 | bne \reg1, r0, \label |
| 288 | .endm |
| 289 | |
| 290 | /* |
| 291 | * Pushes reg onto the stack. |
| 292 | */ |
| 293 | |
| 294 | .macro PUSH reg |
| 295 | addi sp, sp, -4 |
| 296 | stw \reg, 0(sp) |
| 297 | .endm |
| 298 | |
| 299 | /* |
| 300 | * Pops the top of the stack into reg. |
| 301 | */ |
| 302 | |
| 303 | .macro POP reg |
| 304 | ldw \reg, 0(sp) |
| 305 | addi sp, sp, 4 |
| 306 | .endm |
| 307 | |
| 308 | |
| 309 | #endif /* _ASM_NIOS2_ASMMACROS_H */ |