/* Assembly macros for 32-bit PowerPC.

   Copyright (C) 1999-2018 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, see

   <http://www.gnu.org/licenses/>.  */

#include <sysdeps/powerpc/sysdep.h>

#ifdef __ASSEMBLER__

/* 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.  */

# define CALL_MCOUNT							      \

  mflr  r0;								      \

  stw   r0,4(r1);							      \

  cfi_offset (lr, 4);							      \

  bl    JUMPTARGET(_mcount);

#else  /* PROF */

# define CALL_MCOUNT		/* Do nothing.  */

#endif /* PROF */

#define	ENTRY(name)							      \

  .globl C_SYMBOL_NAME(name);						      \

  .type C_SYMBOL_NAME(name),@function;					      \

  .align ALIGNARG(2);							      \

  C_LABEL(name)								      \

  cfi_startproc;							      \

  CALL_MCOUNT

#define ENTRY_TOCLESS(name) ENTRY(name)

/* helper macro for accessing the 32-bit powerpc GOT. */

#define	SETUP_GOT_ACCESS(regname,GOT_LABEL)				      \

	bcl	20,31,GOT_LABEL	;					      \

GOT_LABEL:			;					      \

	mflr	(regname)

#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)					      \

  .globl C_SYMBOL_NAME(name);						      \

  .type C_SYMBOL_NAME(name),@function;					      \

  .align ALIGNARG(2);							      \

  C_LABEL(name)								      \

  cfi_startproc;							      \

  CALL_MCOUNT								      \

  b 0f;									      \

  .align ALIGNARG(alignt);						      \

  EALIGN_W_##words;							      \

  0:

#else /* PROF */

# define EALIGN(name, alignt, words)					      \

  .globl C_SYMBOL_NAME(name);						      \

  .type C_SYMBOL_NAME(name),@function;					      \

  .align ALIGNARG(alignt);						      \

  EALIGN_W_##words;							      \

  C_LABEL(name)								      \

  cfi_startproc;

#endif

#undef	END

#define END(name)							      \

  cfi_endproc;								      \

  ASM_SIZE_DIRECTIVE(name)

#define DO_CALL(syscall)						      \

    li 0,syscall;							      \

    sc

#undef JUMPTARGET

#ifdef PIC

# define JUMPTARGET(name) name##@plt

#else

# define JUMPTARGET(name) name

#endif

#if defined SHARED && defined PIC && !defined NO_HIDDEN

# undef HIDDEN_JUMPTARGET

# define HIDDEN_JUMPTARGET(name) __GI_##name##@local

#endif

#define PSEUDO(name, syscall_name, args)				      \

  .section ".text";							      \

  ENTRY (name)								      \

    DO_CALL (SYS_ify (syscall_name));

#define PSEUDO_RET							      \

    bnslr+;								      \

    b __syscall_error@local

#define ret PSEUDO_RET

#undef	PSEUDO_END

#define	PSEUDO_END(name)						      \

  END (name)

#define PSEUDO_NOERRNO(name, syscall_name, args)			      \

  .section ".text";							      \

  ENTRY (name)								      \

    DO_CALL (SYS_ify (syscall_name));

#define PSEUDO_RET_NOERRNO						      \

    blr

#define ret_NOERRNO PSEUDO_RET_NOERRNO

#undef	PSEUDO_END_NOERRNO

#define	PSEUDO_END_NOERRNO(name)					      \

  END (name)

#define PSEUDO_ERRVAL(name, syscall_name, args)				      \

  .section ".text";							      \

  ENTRY (name)								      \

    DO_CALL (SYS_ify (syscall_name));

#define PSEUDO_RET_ERRVAL						      \

    blr

#define ret_ERRVAL PSEUDO_RET_ERRVAL

#undef	PSEUDO_END_ERRVAL

#define	PSEUDO_END_ERRVAL(name)						      \

  END (name)

/* Local labels stripped out by the linker.  */

#undef L

#define L(x) .L##x

#define XGLUE(a,b) a##b

#define GLUE(a,b) XGLUE (a,b)

#define GENERATE_GOT_LABEL(name) GLUE (.got_label, name)

/* Label in text section.  */

#define C_TEXT(name) name

#endif	/* __ASSEMBLER__ */