sysdeps/unix/sysv/aix/sysdep.h

   1 /* Copyright (C) 1999, 2000 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 #include <sysdeps/unix/powerpc/sysdep.h>
  20
  21
  22 /* This seems to always be the case on PPC.  */
  23 #define ALIGNARG(log2) log2
  24
  25 /* How to define local lables.  */
  26 #define L(name) L..##name
  27
  28 /* Label in text section.  */
  29 #define C_TEXT(name) .##name
  30
  31 /* Function descriptor.  */
  32 #define FUNCDESC(real, code) \
  33   .toc;                                                                       \
  34   .csect real##[DS], 3;                                                       \
  35   .globl real;                                                                \
  36 real:                                                                         \
  37   .long code, TOC[tc0], 0;
  38
  39 /* Code to generate function entry code.  */
  40 #define ENTRY(name) \
  41   FUNCDESC (name, C_TEXT (name))                                              \
  42   .csect .text[PR], 2;                                                        \
  43   .globl C_TEXT (name);                                                       \
  44 C_TEXT (name):
  45
  46 /* XXX For now we don't define any code.  */
  47 #define CALL_MCOUNT
  48
  49 #define EALIGN_W_0  /* No words to insert.  */
  50 #define EALIGN_W_1  nop
  51 #define EALIGN_W_2  nop;nop
  52 #define EALIGN_W_3  nop;nop;nop
  53 #define EALIGN_W_4  EALIGN_W_3;nop
  54 #define EALIGN_W_5  EALIGN_W_4;nop
  55 #define EALIGN_W_6  EALIGN_W_5;nop
  56 #define EALIGN_W_7  EALIGN_W_6;nop
  57
  58 /* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
  59    past a 2^align boundary.  */
  60 #ifdef PROF
  61 #define EALIGN(name, alignt, words)                                           \
  62   FUNCDESC (name, C_TEXT (name))                                              \
  63   .csect .text[PR], 2;                                                        \
  64   .align ALIGNARG(2);                                                         \
  65   .globl C_TEXT (name);                                                       \
  66 C_TEXT (name):                                                                \
  67   CALL_MCOUNT                                                                 \
  68   b L(align_0);                                                               \
  69   .align ALIGNARG(alignt);                                                    \
  70   EALIGN_W_##words;                                                           \
  71 L(align_0):
  72 #else /* PROF */
  73 #define EALIGN(name, alignt, words)                                           \
  74   FUNCDESC (name, C_TEXT (name))                                              \
  75   .csect .text[PR], 2;                                                        \
  76   .align ALIGNARG(alignt);                                                    \
  77   EALIGN_W_##words;                                                           \
  78   .globl C_TEXT (name);                                                       \
  79 C_TEXT (name):
  80 #endif
  81
  82 /* No special end code for now.  We will eventually add to usual prolog
  83    with function length etc.  */
  84 #define END(name)
  85
  86
  87 /* Jumping to another function.  We are jumping to the TOC entry.  */
  88 #define JUMPTARGET(name) C_TEXT (name)