1  /* Assembler macros for C-SKY.
       2     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <sysdeps/generic/sysdep.h>
      20  #include <features.h>
      21  
      22  #ifdef __ASSEMBLER__
      23  
      24  # define ASM_SIZE_DIRECTIVE(name) .size name,.-name
      25  
      26  /* Define an entry point visible from C.  */
      27  # define ENTRY(name)		\
      28  	.globl name;		\
      29  	.type name,@function;	\
      30  	.align 4;		\
      31  	name##:;		\
      32  	cfi_startproc;		\
      33  	CALL_MCOUNT
      34  
      35  # undef  END
      36  # define END(name)		\
      37  	cfi_endproc;		\
      38  	ASM_SIZE_DIRECTIVE(name)
      39  
      40  /* If compiled for profiling, call `mcount' at the start of each function.  */
      41  # ifdef PROF
      42  #  ifdef __PIC__
      43  #   define CALL_MCOUNT				\
      44  	subi	sp, 4;				\
      45  	stw	lr, (sp, 0);			\
      46  	grs	t0, .Lgetpc;			\
      47  .Lgetpc:					\
      48  	lrw	gb, .Lgetpc@GOTPC;		\
      49  	addu	gb, t0;				\
      50  	lrw	t1, _mcount@PLT;		\
      51  	ldr.w	t0, (gb, t1 << 0);		\
      52  	jmp	t0;
      53  #  else
      54  #   define CALL_MCOUNT				\
      55  	subi	sp, 4;				\
      56  	stw	lr, (sp, 0);			\
      57  	jbsr	_mcount;
      58  #  endif
      59  # else
      60  #  define CALL_MCOUNT	/* Do nothing.  */
      61  # endif
      62  
      63  # if defined (__CK860__)
      64  /* Instruction fetch will be faster when the label is 16 bytes aligned.
      65     Filling with nop instruction to avoid extra jump.  */
      66  #  define LABLE_ALIGN	\
      67  	.balignw 16, 0x6c03
      68  
      69  #  define PRE_BNEZAD(R)
      70  
      71  #  define BNEZAD(R, L)	\
      72  	bnezad	R, L
      73  # else
      74  #  define LABLE_ALIGN	\
      75  	.balignw 8, 0x6c03
      76  
      77  #  define PRE_BNEZAD(R)	\
      78  	subi	R, 1
      79  
      80  #  define BNEZAD(R, L)	\
      81  	bnez	R, L
      82  # endif
      83  
      84  #endif