1/* Assembler macros for C-SKY.
 2   Copyright (C) 2018-2025 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