sysdeps/powerpc/gprrest0.S

   1 /* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /*
  20     General Purpose Register (GPR) restore routine
  21     when Floating Point Registers (FPRs) are not saved
  22
  23     Note: This restore routine must not be called when GPR30 or
  24     GPR31, or both, are the only registers beings saved. In these
  25     cases, the saving and restoring must be done inline.
  26 */
  27
  28 #include <sysdep.h>
  29
  30 ENTRY(_restgpr0_all)
  31                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_13)
  32 C_TEXT(_restgpr0_13):   lwz     r13,-76(r1)
  33                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_14)
  34 C_TEXT(_restgpr0_14):   lwz     r14,-72(r1)
  35                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_15)
  36 C_TEXT(_restgpr0_15):   lwz     r15,-68(r1)
  37                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_16)
  38 C_TEXT(_restgpr0_16):   lwz     r16,-64(r1)
  39                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_17)
  40 C_TEXT(_restgpr0_17):   lwz     r17,-60(r1)
  41                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_18)
  42 C_TEXT(_restgpr0_18):   lwz     r18,-56(r1)
  43                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_19)
  44 C_TEXT(_restgpr0_19):   lwz     r19,-52(r1)
  45                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_20)
  46 C_TEXT(_restgpr0_20):   lwz     r20,-48(r1)
  47                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_21)
  48 C_TEXT(_restgpr0_21):   lwz     r21,-44(r1)
  49                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_22)
  50 C_TEXT(_restgpr0_22):   lwz     r22,-40(r1)
  51                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_23)
  52 C_TEXT(_restgpr0_23):   lwz     r23,-36(r1)
  53                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_24)
  54 C_TEXT(_restgpr0_24):   lwz     r24,-32(r1)
  55                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_25)
  56 C_TEXT(_restgpr0_25):   lwz     r25,-28(r1)
  57                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_26)
  58 C_TEXT(_restgpr0_26):   lwz     r26,-24(r1)
  59                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_27)
  60 C_TEXT(_restgpr0_27):   lwz     r27,-20(r1)
  61                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_28)
  62 C_TEXT(_restgpr0_28):   lwz     r28,-16(r1)
  63                 ASM_GLOBAL_DIRECTIVE C_TEXT(_restgpr0_29)
  64 C_TEXT(_restgpr0_29):   lwz     r0,8(r1)        #get return address from frame
  65                         lwz     r29,-12(r1)     #restore r29
  66                         mtlr    r0              #move return address to LR
  67                         lwz     r30,-8(r1)      #restore r30
  68                         lwz     r31,-4(r1)      #restore r31
  69                         blr                     #return