1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
; Test XORs of a constant into a byte of memory.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check the lowest useful constant, expressed as a signed integer.
define void @f1(i8 *%ptr) {
; CHECK-LABEL: f1:
; CHECK: xi 0(%r2), 1
; CHECK: br %r14
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, -255
store i8 %xor, i8 *%ptr
ret void
}
; Check the highest useful constant, expressed as a signed integer.
define void @f2(i8 *%ptr) {
; CHECK-LABEL: f2:
; CHECK: xi 0(%r2), 254
; CHECK: br %r14
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, -2
store i8 %xor, i8 *%ptr
ret void
}
; Check the lowest useful constant, expressed as an unsigned integer.
define void @f3(i8 *%ptr) {
; CHECK-LABEL: f3:
; CHECK: xi 0(%r2), 1
; CHECK: br %r14
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 1
store i8 %xor, i8 *%ptr
ret void
}
; Check the highest useful constant, expressed as a unsigned integer.
define void @f4(i8 *%ptr) {
; CHECK-LABEL: f4:
; CHECK: xi 0(%r2), 254
; CHECK: br %r14
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 254
store i8 %xor, i8 *%ptr
ret void
}
; Check the high end of the XI range.
define void @f5(i8 *%src) {
; CHECK-LABEL: f5:
; CHECK: xi 4095(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 4095
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check the next byte up, which should use XIY instead of XI.
define void @f6(i8 *%src) {
; CHECK-LABEL: f6:
; CHECK: xiy 4096(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 4096
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check the high end of the XIY range.
define void @f7(i8 *%src) {
; CHECK-LABEL: f7:
; CHECK: xiy 524287(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 524287
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check the next byte up, which needs separate address logic.
; Other sequences besides this one would be OK.
define void @f8(i8 *%src) {
; CHECK-LABEL: f8:
; CHECK: agfi %r2, 524288
; CHECK: xi 0(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 524288
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check the high end of the negative XIY range.
define void @f9(i8 *%src) {
; CHECK-LABEL: f9:
; CHECK: xiy -1(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 -1
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check the low end of the XIY range.
define void @f10(i8 *%src) {
; CHECK-LABEL: f10:
; CHECK: xiy -524288(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 -524288
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check the next byte down, which needs separate address logic.
; Other sequences besides this one would be OK.
define void @f11(i8 *%src) {
; CHECK-LABEL: f11:
; CHECK: agfi %r2, -524289
; CHECK: xi 0(%r2), 127
; CHECK: br %r14
%ptr = getelementptr i8, i8 *%src, i64 -524289
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check that XI does not allow an index
define void @f12(i64 %src, i64 %index) {
; CHECK-LABEL: f12:
; CHECK: agr %r2, %r3
; CHECK: xi 4095(%r2), 127
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 4095
%ptr = inttoptr i64 %add2 to i8 *
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
; Check that XIY does not allow an index
define void @f13(i64 %src, i64 %index) {
; CHECK-LABEL: f13:
; CHECK: agr %r2, %r3
; CHECK: xiy 4096(%r2), 127
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 4096
%ptr = inttoptr i64 %add2 to i8 *
%val = load i8 , i8 *%ptr
%xor = xor i8 %val, 127
store i8 %xor, i8 *%ptr
ret void
}
|
