1# See LICENSE for license details.
2
3#*****************************************************************************
4# lbu.S
5#-----------------------------------------------------------------------------
6#
7# Test lbu instruction.
8#
9
10#include "riscv_test.h"
11#include "test_macros.h"
12
13RVTEST_RV64U
14RVTEST_CODE_BEGIN
15
16  #-------------------------------------------------------------
17  # Basic tests
18  #-------------------------------------------------------------
19
20  TEST_LD_OP( 2, lbu, 0x00000000000000ff, 0,  tdat );
21  TEST_LD_OP( 3, lbu, 0x0000000000000000, 1,  tdat );
22  TEST_LD_OP( 4, lbu, 0x00000000000000f0, 2,  tdat );
23  TEST_LD_OP( 5, lbu, 0x000000000000000f, 3, tdat );
24
25  # Test with negative offset
26
27  TEST_LD_OP( 6, lbu, 0x00000000000000ff, -3, tdat4 );
28  TEST_LD_OP( 7, lbu, 0x0000000000000000, -2,  tdat4 );
29  TEST_LD_OP( 8, lbu, 0x00000000000000f0, -1,  tdat4 );
30  TEST_LD_OP( 9, lbu, 0x000000000000000f, 0,   tdat4 );
31
32  # Test with a negative base
33
34  TEST_CASE( 10, x5, 0x00000000000000ff, \
35    la  x1, tdat; \
36    addi x1, x1, -32; \
37    lbu x5, 32(x1); \
38  )
39
40  # Test with unaligned base
41
42  TEST_CASE( 11, x5, 0x0000000000000000, \
43    la  x1, tdat; \
44    addi x1, x1, -6; \
45    lbu x5, 7(x1); \
46  )
47
48  #-------------------------------------------------------------
49  # Bypassing tests
50  #-------------------------------------------------------------
51
52  TEST_LD_DEST_BYPASS( 12, 0, lbu, 0x00000000000000f0, 1, tdat2 );
53  TEST_LD_DEST_BYPASS( 13, 1, lbu, 0x000000000000000f, 1, tdat3 );
54  TEST_LD_DEST_BYPASS( 14, 2, lbu, 0x0000000000000000, 1, tdat1 );
55
56  TEST_LD_SRC1_BYPASS( 15, 0, lbu, 0x00000000000000f0, 1, tdat2 );
57  TEST_LD_SRC1_BYPASS( 16, 1, lbu, 0x000000000000000f, 1, tdat3 );
58  TEST_LD_SRC1_BYPASS( 17, 2, lbu, 0x0000000000000000, 1, tdat1 );
59
60  #-------------------------------------------------------------
61  # Test write-after-write hazard
62  #-------------------------------------------------------------
63
64  TEST_CASE( 18, x2, 2, \
65    la  x5, tdat; \
66    lbu  x2, 0(x5); \
67    li  x2, 2; \
68  )
69
70  TEST_CASE( 19, x2, 2, \
71    la  x5, tdat; \
72    lbu  x2, 0(x5); \
73    nop; \
74    li  x2, 2; \
75  )
76
77  TEST_PASSFAIL
78
79RVTEST_CODE_END
80
81  .data
82RVTEST_DATA_BEGIN
83
84  TEST_DATA
85
86tdat:
87tdat1:  .byte 0xff
88tdat2:  .byte 0x00
89tdat3:  .byte 0xf0
90tdat4:  .byte 0x0f
91
92RVTEST_DATA_END
93