1 ; Test 16-bit compare and swap.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-MAIN
4 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT
6 ; Check compare and swap with a variable.
7 ; - CHECK is for the main loop.
8 ; - CHECK-SHIFT makes sure that the negated shift count used by the second
9 ; RLL is set up correctly. The negation is independent of the NILL and L
10 ; tested in CHECK. CHECK-SHIFT also checks that %r3 is not modified before
11 ; being used in the RISBG (in contrast to things like atomic addition,
12 ; which shift %r3 left so that %b is at the high end of the word).
13 define i16 @f1(i16 %dummy, i16 *%src, i16 %cmp, i16 %swap) {
14 ; CHECK-MAIN-LABEL: f1:
15 ; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r3, 0, 189, 0{{$}}
16 ; CHECK-MAIN-DAG: sll %r3, 3
17 ; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
18 ; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
19 ; CHECK-MAIN: rll %r2, [[OLD]], 16(%r3)
20 ; CHECK-MAIN: risbg %r4, %r2, 32, 47, 0
21 ; CHECK-MAIN: crjlh %r2, %r4, [[EXIT:\.[^ ]*]]
22 ; CHECK-MAIN: risbg %r5, %r2, 32, 47, 0
23 ; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -16({{%r[1-9]+}})
24 ; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
25 ; CHECK-MAIN: jl [[LOOP]]
26 ; CHECK-MAIN: [[EXIT]]:
30 ; CHECK-SHIFT-LABEL: f1:
31 ; CHECK-SHIFT: sll %r3, 3
32 ; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r3
34 ; CHECK-SHIFT: rll {{%r[0-9]+}}, %r5, -16([[NEGSHIFT]])
35 %pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
36 %res = extractvalue { i16, i1 } %pair, 0
40 ; Check compare and swap with constants. We should force the constants into
41 ; registers and use the sequence above.
42 define i16 @f2(i16 *%src) {
44 ; CHECK: lhi [[CMP:%r[0-9]+]], 42
45 ; CHECK: risbg [[CMP]], {{%r[0-9]+}}, 32, 47, 0
49 ; CHECK-SHIFT-LABEL: f2:
50 ; CHECK-SHIFT: lhi [[SWAP:%r[0-9]+]], 88
52 ; CHECK-SHIFT: risbg [[SWAP]], {{%r[0-9]+}}, 32, 47, 0
53 ; CHECK-SHIFT: br %r14
54 %pair = cmpxchg i16 *%src, i16 42, i16 88 seq_cst seq_cst
55 %res = extractvalue { i16, i1 } %pair, 0
59 ; Check generating the comparison result.
60 define i32 @f3(i16 %dummy, i16 *%src, i16 %cmp, i16 %swap) {
61 ; CHECK-MAIN-LABEL: f3:
62 ; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r3, 0, 189, 0{{$}}
63 ; CHECK-MAIN-DAG: sll %r3, 3
64 ; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
65 ; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
66 ; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 16(%r3)
67 ; CHECK-MAIN: risbg %r4, [[TMP]], 32, 47, 0
68 ; CHECK-MAIN: cr [[TMP]], %r4
69 ; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
70 ; CHECK-MAIN: risbg %r5, [[TMP]], 32, 47, 0
71 ; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -16({{%r[1-9]+}})
72 ; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
73 ; CHECK-MAIN: jl [[LOOP]]
74 ; CHECK-MAIN: [[EXIT]]:
75 ; CHECK-MAIN-NEXT: ipm %r2
76 ; CHECK-MAIN-NEXT: afi %r2, -268435456
77 ; CHECK-MAIN-NEXT: srl %r2, 31
81 ; CHECK-SHIFT-LABEL: f3:
82 ; CHECK-SHIFT: sll %r3, 3
83 ; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r3
85 ; CHECK-SHIFT: rll {{%r[0-9]+}}, %r5, -16([[NEGSHIFT]])
86 %pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
87 %val = extractvalue { i16, i1 } %pair, 1
88 %res = zext i1 %val to i32
94 ; Check using the comparison result for a branch.
96 ; CHECK-MAIN-LABEL: f4:
97 ; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
98 ; CHECK-MAIN-DAG: sll %r2, 3
99 ; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
100 ; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
101 ; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 16(%r2)
102 ; CHECK-MAIN: risbg %r3, [[TMP]], 32, 47, 0
103 ; CHECK-MAIN: cr [[TMP]], %r3
104 ; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
105 ; CHECK-MAIN: risbg %r4, [[TMP]], 32, 47, 0
106 ; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r4, -16({{%r[1-9]+}})
107 ; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
108 ; CHECK-MAIN: jl [[LOOP]]
109 ; CHECK-MAIN: [[EXIT]]:
110 ; CHECK-MAIN-NEXT: jlh [[LABEL:\.[^ ]*]]
112 ; CHECK-MAIN: [[LABEL]]:
113 ; CHECK-MAIN: br %r14
115 ; CHECK-SHIFT-LABEL: f4:
116 ; CHECK-SHIFT: sll %r2, 3
117 ; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2
119 ; CHECK-SHIFT: rll {{%r[0-9]+}}, %r4, -16([[NEGSHIFT]])
120 define void @f4(i16 *%src, i16 %cmp, i16 %swap) {
121 %pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
122 %cond = extractvalue { i16, i1 } %pair, 1
123 br i1 %cond, label %call, label %exit
133 ; ... and the same with the inverted direction.
134 ; CHECK-MAIN-LABEL: f5:
135 ; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
136 ; CHECK-MAIN-DAG: sll %r2, 3
137 ; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
138 ; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
139 ; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 16(%r2)
140 ; CHECK-MAIN: risbg %r3, [[TMP]], 32, 47, 0
141 ; CHECK-MAIN: cr [[TMP]], %r3
142 ; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
143 ; CHECK-MAIN: risbg %r4, [[TMP]], 32, 47, 0
144 ; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r4, -16({{%r[1-9]+}})
145 ; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
146 ; CHECK-MAIN: jl [[LOOP]]
147 ; CHECK-MAIN: [[EXIT]]:
148 ; CHECK-MAIN-NEXT: jlh [[LABEL:\.[^ ]*]]
149 ; CHECK-MAIN: br %r14
150 ; CHECK-MAIN: [[LABEL]]:
153 ; CHECK-SHIFT-LABEL: f5:
154 ; CHECK-SHIFT: sll %r2, 3
155 ; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2
157 ; CHECK-SHIFT: rll {{%r[0-9]+}}, %r4, -16([[NEGSHIFT]])
158 define void @f5(i16 *%src, i16 %cmp, i16 %swap) {
159 %pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
160 %cond = extractvalue { i16, i1 } %pair, 1
161 br i1 %cond, label %exit, label %call