/* Copyright (C) 1999, 2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include_next <sysdep.h>

#ifdef __ASSEMBLER__

/* Symbolic names for the registers.  The only portable way to write asm
   code is to use number but this produces really unreadable code.
   Therefore these symbolic names.  */

/* Integer registers.  */
#define r0      0
#define r1      1
#define r2      2
#define r3      3
#define r4      4
#define r5      5
#define r6      6
#define r7      7
#define r8      8
#define r9      9
#define r10     10
#define r11     11
#define r12     12
#define r13     13
#define r14     14
#define r15     15
#define r16     16
#define r17     17
#define r18     18
#define r19     19
#define r20     20
#define r21     21
#define r22     22
#define r23     23
#define r24     24
#define r25     25
#define r26     26
#define r27     27
#define r28     28
#define r29     29
#define r30     30
#define r31     31

/* Floating-point registers.  */
#define fp0     0
#define fp1     1
#define fp2     2
#define fp3     3
#define fp4     4
#define fp5     5
#define fp6     6
#define fp7     7
#define fp8     8
#define fp9     9
#define fp10    10
#define fp11    11
#define fp12    12
#define fp13    13
#define fp14    14
#define fp15    15
#define fp16    16
#define fp17    17
#define fp18    18
#define fp19    19
#define fp20    20
#define fp21    21
#define fp22    22
#define fp23    23
#define fp24    24
#define fp25    25
#define fp26    26
#define fp27    27
#define fp28    28
#define fp29    29
#define fp30    30
#define fp31    31

/* Condition code registers.  */
#define cr0     0
#define cr1     1
#define cr2     2
#define cr3     3
#define cr4     4
#define cr5     5
#define cr6     6
#define cr7     7


#ifdef __ELF__

/* This seems to always be the case on PPC.  */
#define ALIGNARG(log2) log2
/* For ELF we need the `.type' directive to make shared libs work right.  */
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name

/* If compiled for profiling, call `_mcount' at the start of each function.  */
#ifdef  PROF
/* The mcount code relies on a the return address being on the stack
   to locate our caller and so it can restore it; so store one just
   for its benefit.  */
#ifdef PIC
#define CALL_MCOUNT                                                           \
  .pushsection;                                                               \
  .section ".data";                                                           \
  .align ALIGNARG(2);                                                         \
0:.long 0;                                                                    \
  .previous;                                                                  \
  mflr  r0;                                                                   \
  stw   r0,4(r1);                                                             \
  bl    _GLOBAL_OFFSET_TABLE_@local-4;                                        \
  mflr  r11;                                                                  \
  lwz   r0,0b@got(r11);                                                       \
  bl    JUMPTARGET(_mcount);
#else  /* PIC */
#define CALL_MCOUNT                                                           \
  .section ".data";                                                           \
  .align ALIGNARG(2);                                                         \
0:.long 0;                                                                    \
  .previous;                                                                  \
  mflr  r0;                                                                   \
  lis   r11,0b@ha;                                                            \
  stw   r0,4(r1);                                                             \
  addi  r0,r11,0b@l;                                                          \
  bl    JUMPTARGET(_mcount);
#endif /* PIC */
#else  /* PROF */
#define CALL_MCOUNT             /* Do nothing.  */
#endif /* PROF */

#define ENTRY(name)                                                           \
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
  .align ALIGNARG(2);                                                         \
  C_LABEL(name)                                                               \
  CALL_MCOUNT

#define EALIGN_W_0  /* No words to insert.  */
#define EALIGN_W_1  nop
#define EALIGN_W_2  nop;nop
#define EALIGN_W_3  nop;nop;nop
#define EALIGN_W_4  EALIGN_W_3;nop
#define EALIGN_W_5  EALIGN_W_4;nop
#define EALIGN_W_6  EALIGN_W_5;nop
#define EALIGN_W_7  EALIGN_W_6;nop

/* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
   past a 2^align boundary.  */
#ifdef PROF
#define EALIGN(name, alignt, words)                                           \
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
  .align ALIGNARG(2);                                                         \
  C_LABEL(name)                                                               \
  CALL_MCOUNT                                                                 \
  b 0f;                                                                       \
  .align ALIGNARG(alignt);                                                    \
  EALIGN_W_##words;                                                           \
  0:
#else /* PROF */
#define EALIGN(name, alignt, words)                                           \
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
  .align ALIGNARG(alignt);                                                    \
  EALIGN_W_##words;                                                           \
  C_LABEL(name)
#endif

#undef  END
#define END(name)                                                             \
  ASM_SIZE_DIRECTIVE(name)

#define DO_CALL(syscall)                                                      \
    li 0,syscall;                                                             \
    sc

#ifdef PIC
#define JUMPTARGET(name) name##@plt
#else
#define JUMPTARGET(name) name
#endif

#define PSEUDO(name, syscall_name, args)                                      \
  .section ".text";                                                           \
  ENTRY (name)                                                                \
    DO_CALL (SYS_ify (syscall_name));

#define PSEUDO_RET                                                            \
    bnslr;                                                                    \
    b JUMPTARGET(__syscall_error)
#define ret PSEUDO_RET

#undef  PSEUDO_END
#define PSEUDO_END(name)                                                      \
  END (name)

/* Local labels stripped out by the linker.  */
#undef L
#define L(x) .L##x

/* Label in text section.  */
#define C_TEXT(name) name

#endif /* __ELF__ */


#endif  /* __ASSEMBLER__ */