libgcc/config/riscv/save-restore.S

   1 /* Callee-saved register spill and fill routines for RISC-V.
   2
   3    Copyright (C) 2016-2017 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "riscv-asm.h"
  27
  28   .text
  29
  30 #if __riscv_xlen == 64
  31
  32 FUNC_BEGIN (__riscv_save_12)
  33   .cfi_startproc
  34   # __riscv_save_* routine use t0/x5 as return address
  35   .cfi_return_column 5
  36   addi sp, sp, -112
  37   .cfi_def_cfa_offset 112
  38   li t1, 0
  39   sd s11, 8(sp)
  40   .cfi_offset 27, -104
  41   j .Ls10
  42
  43 FUNC_BEGIN (__riscv_save_11)
  44 FUNC_BEGIN (__riscv_save_10)
  45   .cfi_restore 27
  46   addi sp, sp, -112
  47   .cfi_def_cfa_offset 112
  48   li t1, -16
  49 .Ls10:
  50   sd s10, 16(sp)
  51   .cfi_offset 26, -96
  52   sd s9, 24(sp)
  53   .cfi_offset 25, -88
  54   j .Ls8
  55
  56 FUNC_BEGIN (__riscv_save_9)
  57 FUNC_BEGIN (__riscv_save_8)
  58   .cfi_restore 25
  59   .cfi_restore 26
  60   .cfi_restore 27
  61   addi sp, sp, -112
  62   .cfi_def_cfa_offset 112
  63   li t1, -32
  64 .Ls8:
  65   sd s8, 32(sp)
  66   .cfi_offset 24, -80
  67   sd s7, 40(sp)
  68   .cfi_offset 23, -72
  69   j .Ls6
  70
  71 FUNC_BEGIN (__riscv_save_7)
  72 FUNC_BEGIN (__riscv_save_6)
  73   .cfi_restore 23
  74   .cfi_restore 24
  75   .cfi_restore 25
  76   .cfi_restore 26
  77   .cfi_restore 27
  78   addi sp, sp, -112
  79   .cfi_def_cfa_offset 112
  80   li t1, -48
  81 .Ls6:
  82   sd s6, 48(sp)
  83   .cfi_offset 22, -64
  84   sd s5, 56(sp)
  85   .cfi_offset 21, -56
  86   j .Ls4
  87
  88 FUNC_BEGIN (__riscv_save_5)
  89 FUNC_BEGIN (__riscv_save_4)
  90   .cfi_restore 21
  91   .cfi_restore 22
  92   .cfi_restore 24
  93   .cfi_restore 25
  94   .cfi_restore 26
  95   .cfi_restore 27
  96   .cfi_restore 24
  97   .cfi_restore 25
  98   .cfi_restore 26
  99   .cfi_restore 27
 100   addi sp, sp, -112
 101   .cfi_def_cfa_offset 112
 102   li t1, -64
 103 .Ls4:
 104   sd s4, 64(sp)
 105   .cfi_offset 20, -48
 106   sd s3, 72(sp)
 107   .cfi_offset 19, -40
 108   j .Ls2
 109
 110 FUNC_BEGIN (__riscv_save_3)
 111 FUNC_BEGIN (__riscv_save_2)
 112   .cfi_restore 19
 113   .cfi_restore 20
 114   .cfi_restore 21
 115   .cfi_restore 22
 116   .cfi_restore 24
 117   .cfi_restore 25
 118   .cfi_restore 26
 119   .cfi_restore 27
 120   .cfi_restore 24
 121   .cfi_restore 25
 122   .cfi_restore 26
 123   .cfi_restore 27
 124   addi sp, sp, -112
 125   .cfi_def_cfa_offset 112
 126   li t1, -80
 127 .Ls2:
 128   sd s2, 80(sp)
 129   .cfi_offset 18, -32
 130   sd s1, 88(sp)
 131   .cfi_offset 9, -24
 132   sd s0, 96(sp)
 133   .cfi_offset 8, -16
 134   sd ra, 104(sp)
 135   .cfi_offset 1, -8
 136   # CFA info is not correct in next 2 instruction since t1's
 137   # value is depend on how may register really save.
 138   sub sp, sp, t1
 139   jr t0
 140   .cfi_endproc
 141 FUNC_END (__riscv_save_12)
 142 FUNC_END (__riscv_save_11)
 143 FUNC_END (__riscv_save_10)
 144 FUNC_END (__riscv_save_9)
 145 FUNC_END (__riscv_save_8)
 146 FUNC_END (__riscv_save_7)
 147 FUNC_END (__riscv_save_6)
 148 FUNC_END (__riscv_save_5)
 149 FUNC_END (__riscv_save_4)
 150 FUNC_END (__riscv_save_3)
 151 FUNC_END (__riscv_save_2)
 152
 153 FUNC_BEGIN (__riscv_save_1)
 154 FUNC_BEGIN (__riscv_save_0)
 155   .cfi_startproc
 156   # __riscv_save_* routine use t0/x5 as return address
 157   .cfi_return_column 5
 158   addi sp, sp, -16
 159   .cfi_def_cfa_offset 16
 160   sd s0, 0(sp)
 161   .cfi_offset 8, -16
 162   sd ra, 8(sp)
 163   .cfi_offset 1, -8
 164   jr t0
 165   .cfi_endproc
 166 FUNC_END (__riscv_save_1)
 167 FUNC_END (__riscv_save_0)
 168
 169 FUNC_BEGIN (__riscv_restore_12)
 170   .cfi_startproc
 171   .cfi_def_cfa_offset 112
 172   .cfi_offset 27, -104
 173   .cfi_offset 26, -96
 174   .cfi_offset 25, -88
 175   .cfi_offset 24, -80
 176   .cfi_offset 23, -72
 177   .cfi_offset 22, -64
 178   .cfi_offset 21, -56
 179   .cfi_offset 20, -48
 180   .cfi_offset 19, -40
 181   .cfi_offset 18, -32
 182   .cfi_offset 9, -24
 183   .cfi_offset 8, -16
 184   .cfi_offset 1, -8
 185   ld s11, 8(sp)
 186   .cfi_restore 27
 187   addi sp, sp, 16
 188
 189 FUNC_BEGIN (__riscv_restore_11)
 190 FUNC_BEGIN (__riscv_restore_10)
 191   .cfi_restore 27
 192   .cfi_def_cfa_offset 96
 193   ld s10, 0(sp)
 194   .cfi_restore 26
 195   ld s9, 8(sp)
 196   .cfi_restore 25
 197   addi sp, sp, 16
 198
 199 FUNC_BEGIN (__riscv_restore_9)
 200 FUNC_BEGIN (__riscv_restore_8)
 201   .cfi_restore 25
 202   .cfi_restore 26
 203   .cfi_restore 27
 204   .cfi_def_cfa_offset 80
 205   ld s8, 0(sp)
 206   .cfi_restore 24
 207   ld s7, 8(sp)
 208   .cfi_restore 23
 209   addi sp, sp, 16
 210
 211 FUNC_BEGIN (__riscv_restore_7)
 212 FUNC_BEGIN (__riscv_restore_6)
 213   .cfi_restore 23
 214   .cfi_restore 24
 215   .cfi_restore 25
 216   .cfi_restore 26
 217   .cfi_restore 27
 218   .cfi_def_cfa_offset 64
 219   ld s6, 0(sp)
 220   .cfi_restore 22
 221   ld s5, 8(sp)
 222   .cfi_restore 21
 223   addi sp, sp, 16
 224
 225 FUNC_BEGIN (__riscv_restore_5)
 226 FUNC_BEGIN (__riscv_restore_4)
 227   .cfi_restore 21
 228   .cfi_restore 22
 229   .cfi_restore 23
 230   .cfi_restore 24
 231   .cfi_restore 25
 232   .cfi_restore 26
 233   .cfi_restore 27
 234   .cfi_def_cfa_offset 48
 235   ld s4, 0(sp)
 236   .cfi_restore 20
 237   ld s3, 8(sp)
 238   .cfi_restore 19
 239   addi sp, sp, 16
 240
 241 FUNC_BEGIN (__riscv_restore_3)
 242 FUNC_BEGIN (__riscv_restore_2)
 243   .cfi_restore 19
 244   .cfi_restore 20
 245   .cfi_restore 21
 246   .cfi_restore 22
 247   .cfi_restore 23
 248   .cfi_restore 24
 249   .cfi_restore 25
 250   .cfi_restore 26
 251   .cfi_restore 27
 252   .cfi_def_cfa_offset 32
 253   ld s2, 0(sp)
 254   .cfi_restore 18
 255   ld s1, 8(sp)
 256   .cfi_restore 9
 257   addi sp, sp, 16
 258
 259 FUNC_BEGIN (__riscv_restore_1)
 260 FUNC_BEGIN (__riscv_restore_0)
 261   .cfi_restore 9
 262   .cfi_restore 18
 263   .cfi_restore 19
 264   .cfi_restore 20
 265   .cfi_restore 21
 266   .cfi_restore 22
 267   .cfi_restore 23
 268   .cfi_restore 24
 269   .cfi_restore 25
 270   .cfi_restore 26
 271   .cfi_restore 27
 272   .cfi_def_cfa_offset 16
 273   ld s0, 0(sp)
 274   .cfi_restore 8
 275   ld ra, 8(sp)
 276   .cfi_restore 1
 277   addi sp, sp, 16
 278   .cfi_def_cfa_offset 0
 279   ret
 280   .cfi_endproc
 281 FUNC_END (__riscv_restore_12)
 282 FUNC_END (__riscv_restore_11)
 283 FUNC_END (__riscv_restore_10)
 284 FUNC_END (__riscv_restore_9)
 285 FUNC_END (__riscv_restore_8)
 286 FUNC_END (__riscv_restore_7)
 287 FUNC_END (__riscv_restore_6)
 288 FUNC_END (__riscv_restore_5)
 289 FUNC_END (__riscv_restore_4)
 290 FUNC_END (__riscv_restore_3)
 291 FUNC_END (__riscv_restore_2)
 292 FUNC_END (__riscv_restore_1)
 293 FUNC_END (__riscv_restore_0)
 294
 295 #else
 296
 297 FUNC_BEGIN (__riscv_save_12)
 298   .cfi_startproc
 299   # __riscv_save_* routine use t0/x5 as return address
 300   .cfi_return_column 5
 301   addi sp, sp, -64
 302   .cfi_def_cfa_offset 64
 303   li t1, 0
 304   sw s11, 12(sp)
 305   .cfi_offset 27, -52
 306   j .Ls10
 307
 308 FUNC_BEGIN (__riscv_save_11)
 309 FUNC_BEGIN (__riscv_save_10)
 310 FUNC_BEGIN (__riscv_save_9)
 311 FUNC_BEGIN (__riscv_save_8)
 312   .cfi_restore 27
 313   addi sp, sp, -64
 314   .cfi_def_cfa_offset 64
 315   li t1, -16
 316 .Ls10:
 317   sw s10, 16(sp)
 318   .cfi_offset 26, -48
 319   sw s9, 20(sp)
 320   .cfi_offset 25, -44
 321   sw s8, 24(sp)
 322   .cfi_offset 24, -40
 323   sw s7, 28(sp)
 324   .cfi_offset 23, -36
 325   j .Ls6
 326
 327 FUNC_BEGIN (__riscv_save_7)
 328 FUNC_BEGIN (__riscv_save_6)
 329 FUNC_BEGIN (__riscv_save_5)
 330 FUNC_BEGIN (__riscv_save_4)
 331   .cfi_restore 23
 332   .cfi_restore 24
 333   .cfi_restore 25
 334   .cfi_restore 26
 335   .cfi_restore 27
 336   addi sp, sp, -64
 337   .cfi_def_cfa_offset 64
 338   li t1, -32
 339 .Ls6:
 340   sw s6, 32(sp)
 341   .cfi_offset 22, -32
 342   sw s5, 36(sp)
 343   .cfi_offset 21, -28
 344   sw s4, 40(sp)
 345   .cfi_offset 20, -24
 346   sw s3, 44(sp)
 347   .cfi_offset 19, -20
 348   sw s2, 48(sp)
 349   .cfi_offset 18, -16
 350   sw s1, 52(sp)
 351   .cfi_offset 9, -12
 352   sw s0, 56(sp)
 353   .cfi_offset 8, -8
 354   sw ra, 60(sp)
 355   .cfi_offset 1, -4
 356   # CFA info is not correct in next 2 instruction since t1's
 357   # value is depend on how may register really save.
 358   sub sp, sp, t1
 359   jr t0
 360   .cfi_endproc
 361 FUNC_END (__riscv_save_12)
 362 FUNC_END (__riscv_save_11)
 363 FUNC_END (__riscv_save_10)
 364 FUNC_END (__riscv_save_9)
 365 FUNC_END (__riscv_save_8)
 366 FUNC_END (__riscv_save_7)
 367 FUNC_END (__riscv_save_6)
 368 FUNC_END (__riscv_save_5)
 369 FUNC_END (__riscv_save_4)
 370
 371 FUNC_BEGIN (__riscv_save_3)
 372 FUNC_BEGIN (__riscv_save_2)
 373 FUNC_BEGIN (__riscv_save_1)
 374 FUNC_BEGIN (__riscv_save_0)
 375   .cfi_startproc
 376   # __riscv_save_* routine use t0/x5 as return address
 377   .cfi_return_column 5
 378   addi sp, sp, -16
 379   .cfi_def_cfa_offset 16
 380   sw s2, 0(sp)
 381   sw s1, 4(sp)
 382   .cfi_offset 9, -16
 383   sw s0, 8(sp)
 384   .cfi_offset 8, -8
 385   sw ra, 12(sp)
 386   .cfi_offset 1, -4
 387   jr t0
 388   .cfi_endproc
 389 FUNC_END (__riscv_save_3)
 390 FUNC_END (__riscv_save_2)
 391 FUNC_END (__riscv_save_1)
 392 FUNC_END (__riscv_save_0)
 393
 394 FUNC_BEGIN (__riscv_restore_12)
 395   .cfi_startproc
 396   .cfi_def_cfa_offset 64
 397   .cfi_offset 27, -52
 398   .cfi_offset 26, -48
 399   .cfi_offset 25, -44
 400   .cfi_offset 24, -40
 401   .cfi_offset 23, -36
 402   .cfi_offset 22, -32
 403   .cfi_offset 21, -28
 404   .cfi_offset 20, -24
 405   .cfi_offset 19, -20
 406   .cfi_offset 18, -16
 407   .cfi_offset 9, -12
 408   .cfi_offset 8, -8
 409   .cfi_offset 1, -4
 410   lw s11, 12(sp)
 411   .cfi_restore 27
 412   addi sp, sp, 16
 413
 414 FUNC_BEGIN (__riscv_restore_11)
 415 FUNC_BEGIN (__riscv_restore_10)
 416 FUNC_BEGIN (__riscv_restore_9)
 417 FUNC_BEGIN (__riscv_restore_8)
 418   .cfi_restore 27
 419   .cfi_def_cfa_offset 48
 420   lw s10, 0(sp)
 421   .cfi_restore 26
 422   lw s9, 4(sp)
 423   .cfi_restore 25
 424   lw s8, 8(sp)
 425   .cfi_restore 24
 426   lw s7, 12(sp)
 427   .cfi_restore 23
 428   addi sp, sp, 16
 429
 430 FUNC_BEGIN (__riscv_restore_7)
 431 FUNC_BEGIN (__riscv_restore_6)
 432 FUNC_BEGIN (__riscv_restore_5)
 433 FUNC_BEGIN (__riscv_restore_4)
 434   .cfi_restore 23
 435   .cfi_restore 24
 436   .cfi_restore 25
 437   .cfi_restore 26
 438   .cfi_restore 27
 439   .cfi_def_cfa_offset 32
 440   lw s6, 0(sp)
 441   .cfi_restore 22
 442   lw s5, 4(sp)
 443   .cfi_restore 21
 444   lw s4, 8(sp)
 445   .cfi_restore 20
 446   lw s3, 12(sp)
 447   .cfi_restore 19
 448   addi sp, sp, 16
 449
 450 FUNC_BEGIN (__riscv_restore_3)
 451 FUNC_BEGIN (__riscv_restore_2)
 452 FUNC_BEGIN (__riscv_restore_1)
 453 FUNC_BEGIN (__riscv_restore_0)
 454   .cfi_restore 19
 455   .cfi_restore 20
 456   .cfi_restore 21
 457   .cfi_restore 22
 458   .cfi_restore 24
 459   .cfi_restore 25
 460   .cfi_restore 26
 461   .cfi_restore 27
 462   .cfi_def_cfa_offset 16
 463   lw s2, 0(sp)
 464   .cfi_restore 18
 465   lw s1, 4(sp)
 466   .cfi_restore 9
 467   lw s0, 8(sp)
 468   .cfi_restore 8
 469   lw ra, 12(sp)
 470   .cfi_restore 1
 471   addi sp, sp, 16
 472   .cfi_def_cfa_offset 0
 473   ret
 474   .cfi_endproc
 475 FUNC_END (__riscv_restore_12)
 476 FUNC_END (__riscv_restore_11)
 477 FUNC_END (__riscv_restore_10)
 478 FUNC_END (__riscv_restore_9)
 479 FUNC_END (__riscv_restore_8)
 480 FUNC_END (__riscv_restore_7)
 481 FUNC_END (__riscv_restore_6)
 482 FUNC_END (__riscv_restore_5)
 483 FUNC_END (__riscv_restore_4)
 484 FUNC_END (__riscv_restore_3)
 485 FUNC_END (__riscv_restore_2)
 486 FUNC_END (__riscv_restore_1)
 487 FUNC_END (__riscv_restore_0)
 488
 489 #endif