1/*
 2 * Copyright 2015 Tilera Corporation. All Rights Reserved.
 3 *
 4 *   This program is free software; you can redistribute it and/or
 5 *   modify it under the terms of the GNU General Public License
 6 *   as published by the Free Software Foundation, version 2.
 7 *
 8 *   This program is distributed in the hope that it will be useful, but
 9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14#ifndef __ASM_TILE_INSN_H
15#define __ASM_TILE_INSN_H
16
17#include <arch/opcode.h>
18
19static inline tilegx_bundle_bits NOP(void)
20{
21	return create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
22		create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
23		create_Opcode_X0(RRR_0_OPCODE_X0) |
24		create_UnaryOpcodeExtension_X1(NOP_UNARY_OPCODE_X1) |
25		create_RRROpcodeExtension_X1(UNARY_RRR_0_OPCODE_X1) |
26		create_Opcode_X1(RRR_0_OPCODE_X1);
27}
28
29static inline tilegx_bundle_bits tilegx_gen_branch(unsigned long pc,
30					    unsigned long addr,
31					    bool link)
32{
33	tilegx_bundle_bits opcode_x0, opcode_x1;
34	long pcrel_by_instr = (addr - pc) >> TILEGX_LOG2_BUNDLE_SIZE_IN_BYTES;
35
36	if (link) {
37		/* opcode: jal addr */
38		opcode_x1 =
39			create_Opcode_X1(JUMP_OPCODE_X1) |
40			create_JumpOpcodeExtension_X1(JAL_JUMP_OPCODE_X1) |
41			create_JumpOff_X1(pcrel_by_instr);
42	} else {
43		/* opcode: j addr */
44		opcode_x1 =
45			create_Opcode_X1(JUMP_OPCODE_X1) |
46			create_JumpOpcodeExtension_X1(J_JUMP_OPCODE_X1) |
47			create_JumpOff_X1(pcrel_by_instr);
48	}
49
50	/* opcode: fnop */
51	opcode_x0 =
52		create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
53		create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
54		create_Opcode_X0(RRR_0_OPCODE_X0);
55
56	return opcode_x1 | opcode_x0;
57}
58
59#endif /* __ASM_TILE_INSN_H */