1/* Tests the jump instructions.
2
3   Copyright (C) 2017-2023 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program 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
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18# mach: or1k
19# output: report(0x48000000);\n
20# output: report(0x00000005);\n
21# output: report(0x00000000);\n
22# output: report(0x00000000);\n
23# output: report(0x00000000);\n
24# output: \n
25# output: report(0x48000000);\n
26# output: report(0x00000009);\n
27# output: report(0x00000000);\n
28# output: report(0x00000001);\n
29# output: report(0x00000000);\n
30# output: \n
31# output: report(0x44000000);\n
32# output: report(0x00000005);\n
33# output: report(0x00000000);\n
34# output: report(0x00000000);\n
35# output: report(0x00000000);\n
36# output: \n
37# output: report(0x44000000);\n
38# output: report(0x00000009);\n
39# output: report(0x00000000);\n
40# output: report(0x00000000);\n
41# output: report(0x00000000);\n
42# output: \n
43# output: exit(0)\n
44
45#include "or1k-asm-test-helpers.h"
46
47/* Tests a jump instruction using a register destination.
48   Checks whether the jump succeeds, or whether an exception is triggered
49   (but not if the right exception was triggered yet).
50
51   We manually construct the opcode, to allow us to force R9 into the
52   destination field, to test exception handling.  Usually the assembler
53   would prevent this.
54
55   Do not specify R31 as the register to use for the jump, as it's used
56   internally.  */
57
58	.macro TEST_JUMP  opcode_value  dest_register_number  alignment_offset
59	REPORT_IMMEDIATE_TO_CONSOLE \opcode_value
60	REPORT_IMMEDIATE_TO_CONSOLE \dest_register_number
61	REPORT_IMMEDIATE_TO_CONSOLE \alignment_offset
62	LOAD_IMMEDIATE r\dest_register_number, 51f + \alignment_offset
63	/* Generate the jump opcode.  */
64\@1$:	OR1K_DELAYED_NOP \
65	  (.word  ( \opcode_value | (\dest_register_number << 11) ))
66	/* If the jump failed, we land here.  */
67	REPORT_IMMEDIATE_TO_CONSOLE 1
68	OR1K_DELAYED_NOP (l.j 52f)
69	/* If the jump succeeds, we land here.  */
7051:	REPORT_IMMEDIATE_TO_CONSOLE 0
7152:	REPORT_EXCEPTION \@1$
72	PRINT_NEWLINE_TO_CONSOLE
73	.endm
74
75	STANDARD_TEST_ENVIRONMENT
76
77	.section .text
78start_tests:
79	PUSH LINK_REGISTER_R9
80
81	/* Test l.jalr (jump and link register)  */
82	TEST_JUMP 0x48000000, 5, 0
83	/* TODO: The sim does not support unaligned memory access yet.
84	TEST_JUMP 0x48000000, 5, 1
85	TEST_JUMP 0x48000000, 5, 2
86	TEST_JUMP 0x48000000, 5, 3
87	*/
88
89	/* Test with link register as the destination.  This is not
90	   allowed.  */
91	TEST_JUMP 0x48000000, 9, 0
92
93	/* Test l.jr (jump register)  */
94	TEST_JUMP 0x44000000, 5, 0
95	/* TODO: The sim does not support unaligned memory access yet.
96	TEST_JUMP 0x44000000, 5, 1
97	TEST_JUMP 0x44000000, 5, 2
98	TEST_JUMP 0x44000000, 5, 3
99	*/
100
101	/* Test with link register as the destination.   */
102	TEST_JUMP 0x44000000, 9, 0
103
104	POP LINK_REGISTER_R9
105	RETURN_TO_LINK_REGISTER_R9
106