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
|
; Test 64-bit multiplication in which the second operand is constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check multiplication by 2, which should use shifts.
define i64 @f1(i64 %a, i64 *%dest) {
; CHECK: f1:
; CHECK: sllg %r2, %r2, 1
; CHECK: br %r14
%mul = mul i64 %a, 2
ret i64 %mul
}
; Check multiplication by 3.
define i64 @f2(i64 %a, i64 *%dest) {
; CHECK: f2:
; CHECK: mghi %r2, 3
; CHECK: br %r14
%mul = mul i64 %a, 3
ret i64 %mul
}
; Check the high end of the MGHI range.
define i64 @f3(i64 %a, i64 *%dest) {
; CHECK: f3:
; CHECK: mghi %r2, 32767
; CHECK: br %r14
%mul = mul i64 %a, 32767
ret i64 %mul
}
; Check the next value up, which should use shifts.
define i64 @f4(i64 %a, i64 *%dest) {
; CHECK: f4:
; CHECK: sllg %r2, %r2, 15
; CHECK: br %r14
%mul = mul i64 %a, 32768
ret i64 %mul
}
; Check the next value up again, which can use MSGFI.
define i64 @f5(i64 %a, i64 *%dest) {
; CHECK: f5:
; CHECK: msgfi %r2, 32769
; CHECK: br %r14
%mul = mul i64 %a, 32769
ret i64 %mul
}
; Check the high end of the MSGFI range.
define i64 @f6(i64 %a, i64 *%dest) {
; CHECK: f6:
; CHECK: msgfi %r2, 2147483647
; CHECK: br %r14
%mul = mul i64 %a, 2147483647
ret i64 %mul
}
; Check the next value up, which should use shifts.
define i64 @f7(i64 %a, i64 *%dest) {
; CHECK: f7:
; CHECK: sllg %r2, %r2, 31
; CHECK: br %r14
%mul = mul i64 %a, 2147483648
ret i64 %mul
}
; Check the next value up again, which cannot use a constant multiplicatoin.
define i64 @f8(i64 %a, i64 *%dest) {
; CHECK: f8:
; CHECK-NOT: msgfi
; CHECK: br %r14
%mul = mul i64 %a, 2147483649
ret i64 %mul
}
; Check multiplication by -1, which is a negation.
define i64 @f9(i64 %a, i64 *%dest) {
; CHECK: f9:
; CHECK: lcgr {{%r[0-5]}}, %r2
; CHECK: br %r14
%mul = mul i64 %a, -1
ret i64 %mul
}
; Check multiplication by -2, which should use shifts.
define i64 @f10(i64 %a, i64 *%dest) {
; CHECK: f10:
; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 1
; CHECK: lcgr %r2, [[SHIFTED]]
; CHECK: br %r14
%mul = mul i64 %a, -2
ret i64 %mul
}
; Check multiplication by -3.
define i64 @f11(i64 %a, i64 *%dest) {
; CHECK: f11:
; CHECK: mghi %r2, -3
; CHECK: br %r14
%mul = mul i64 %a, -3
ret i64 %mul
}
; Check the lowest useful MGHI value.
define i64 @f12(i64 %a, i64 *%dest) {
; CHECK: f12:
; CHECK: mghi %r2, -32767
; CHECK: br %r14
%mul = mul i64 %a, -32767
ret i64 %mul
}
; Check the next value down, which should use shifts.
define i64 @f13(i64 %a, i64 *%dest) {
; CHECK: f13:
; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 15
; CHECK: lcgr %r2, [[SHIFTED]]
; CHECK: br %r14
%mul = mul i64 %a, -32768
ret i64 %mul
}
; Check the next value down again, which can use MSGFI.
define i64 @f14(i64 %a, i64 *%dest) {
; CHECK: f14:
; CHECK: msgfi %r2, -32769
; CHECK: br %r14
%mul = mul i64 %a, -32769
ret i64 %mul
}
; Check the lowest useful MSGFI value.
define i64 @f15(i64 %a, i64 *%dest) {
; CHECK: f15:
; CHECK: msgfi %r2, -2147483647
; CHECK: br %r14
%mul = mul i64 %a, -2147483647
ret i64 %mul
}
; Check the next value down, which should use shifts.
define i64 @f16(i64 %a, i64 *%dest) {
; CHECK: f16:
; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 31
; CHECK: lcgr %r2, [[SHIFTED]]
; CHECK: br %r14
%mul = mul i64 %a, -2147483648
ret i64 %mul
}
; Check the next value down again, which cannot use constant multiplication
define i64 @f17(i64 %a, i64 *%dest) {
; CHECK: f17:
; CHECK-NOT: msgfi
; CHECK: br %r14
%mul = mul i64 %a, -2147483649
ret i64 %mul
}
|
