1; Test 64-bit floating-point comparison.  The tests assume a z10 implementation
2; of select, using conditional branches rather than LOCGR.
3;
4; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
5
6declare double @foo()
7
8; Check comparison with registers.
9define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
10; CHECK-LABEL: f1:
11; CHECK: cdbr %f0, %f2
12; CHECK-NEXT: je
13; CHECK: lgr %r2, %r3
14; CHECK: br %r14
15  %cond = fcmp oeq double %f1, %f2
16  %res = select i1 %cond, i64 %a, i64 %b
17  ret i64 %res
18}
19
20; Check the low end of the CDB range.
21define i64 @f2(i64 %a, i64 %b, double %f1, double *%ptr) {
22; CHECK-LABEL: f2:
23; CHECK: cdb %f0, 0(%r4)
24; CHECK-NEXT: je
25; CHECK: lgr %r2, %r3
26; CHECK: br %r14
27  %f2 = load double *%ptr
28  %cond = fcmp oeq double %f1, %f2
29  %res = select i1 %cond, i64 %a, i64 %b
30  ret i64 %res
31}
32
33; Check the high end of the aligned CDB range.
34define i64 @f3(i64 %a, i64 %b, double %f1, double *%base) {
35; CHECK-LABEL: f3:
36; CHECK: cdb %f0, 4088(%r4)
37; CHECK-NEXT: je
38; CHECK: lgr %r2, %r3
39; CHECK: br %r14
40  %ptr = getelementptr double *%base, i64 511
41  %f2 = load double *%ptr
42  %cond = fcmp oeq double %f1, %f2
43  %res = select i1 %cond, i64 %a, i64 %b
44  ret i64 %res
45}
46
47; Check the next doubleword up, which needs separate address logic.
48; Other sequences besides this one would be OK.
49define i64 @f4(i64 %a, i64 %b, double %f1, double *%base) {
50; CHECK-LABEL: f4:
51; CHECK: aghi %r4, 4096
52; CHECK: cdb %f0, 0(%r4)
53; CHECK-NEXT: je
54; CHECK: lgr %r2, %r3
55; CHECK: br %r14
56  %ptr = getelementptr double *%base, i64 512
57  %f2 = load double *%ptr
58  %cond = fcmp oeq double %f1, %f2
59  %res = select i1 %cond, i64 %a, i64 %b
60  ret i64 %res
61}
62
63; Check negative displacements, which also need separate address logic.
64define i64 @f5(i64 %a, i64 %b, double %f1, double *%base) {
65; CHECK-LABEL: f5:
66; CHECK: aghi %r4, -8
67; CHECK: cdb %f0, 0(%r4)
68; CHECK-NEXT: je
69; CHECK: lgr %r2, %r3
70; CHECK: br %r14
71  %ptr = getelementptr double *%base, i64 -1
72  %f2 = load double *%ptr
73  %cond = fcmp oeq double %f1, %f2
74  %res = select i1 %cond, i64 %a, i64 %b
75  ret i64 %res
76}
77
78; Check that CDB allows indices.
79define i64 @f6(i64 %a, i64 %b, double %f1, double *%base, i64 %index) {
80; CHECK-LABEL: f6:
81; CHECK: sllg %r1, %r5, 3
82; CHECK: cdb %f0, 800(%r1,%r4)
83; CHECK-NEXT: je
84; CHECK: lgr %r2, %r3
85; CHECK: br %r14
86  %ptr1 = getelementptr double *%base, i64 %index
87  %ptr2 = getelementptr double *%ptr1, i64 100
88  %f2 = load double *%ptr2
89  %cond = fcmp oeq double %f1, %f2
90  %res = select i1 %cond, i64 %a, i64 %b
91  ret i64 %res
92}
93
94; Check that comparisons of spilled values can use CDB rather than CDBR.
95define double @f7(double *%ptr0) {
96; CHECK-LABEL: f7:
97; CHECK: brasl %r14, foo@PLT
98; CHECK: cdb {{%f[0-9]+}}, 160(%r15)
99; CHECK: br %r14
100  %ptr1 = getelementptr double *%ptr0, i64 2
101  %ptr2 = getelementptr double *%ptr0, i64 4
102  %ptr3 = getelementptr double *%ptr0, i64 6
103  %ptr4 = getelementptr double *%ptr0, i64 8
104  %ptr5 = getelementptr double *%ptr0, i64 10
105  %ptr6 = getelementptr double *%ptr0, i64 12
106  %ptr7 = getelementptr double *%ptr0, i64 14
107  %ptr8 = getelementptr double *%ptr0, i64 16
108  %ptr9 = getelementptr double *%ptr0, i64 18
109  %ptr10 = getelementptr double *%ptr0, i64 20
110
111  %val0 = load double *%ptr0
112  %val1 = load double *%ptr1
113  %val2 = load double *%ptr2
114  %val3 = load double *%ptr3
115  %val4 = load double *%ptr4
116  %val5 = load double *%ptr5
117  %val6 = load double *%ptr6
118  %val7 = load double *%ptr7
119  %val8 = load double *%ptr8
120  %val9 = load double *%ptr9
121  %val10 = load double *%ptr10
122
123  %ret = call double @foo()
124
125  %cmp0 = fcmp olt double %ret, %val0
126  %cmp1 = fcmp olt double %ret, %val1
127  %cmp2 = fcmp olt double %ret, %val2
128  %cmp3 = fcmp olt double %ret, %val3
129  %cmp4 = fcmp olt double %ret, %val4
130  %cmp5 = fcmp olt double %ret, %val5
131  %cmp6 = fcmp olt double %ret, %val6
132  %cmp7 = fcmp olt double %ret, %val7
133  %cmp8 = fcmp olt double %ret, %val8
134  %cmp9 = fcmp olt double %ret, %val9
135  %cmp10 = fcmp olt double %ret, %val10
136
137  %sel0 = select i1 %cmp0, double %ret, double 0.0
138  %sel1 = select i1 %cmp1, double %sel0, double 1.0
139  %sel2 = select i1 %cmp2, double %sel1, double 2.0
140  %sel3 = select i1 %cmp3, double %sel2, double 3.0
141  %sel4 = select i1 %cmp4, double %sel3, double 4.0
142  %sel5 = select i1 %cmp5, double %sel4, double 5.0
143  %sel6 = select i1 %cmp6, double %sel5, double 6.0
144  %sel7 = select i1 %cmp7, double %sel6, double 7.0
145  %sel8 = select i1 %cmp8, double %sel7, double 8.0
146  %sel9 = select i1 %cmp9, double %sel8, double 9.0
147  %sel10 = select i1 %cmp10, double %sel9, double 10.0
148
149  ret double %sel10
150}
151
152; Check comparison with zero.
153define i64 @f8(i64 %a, i64 %b, double %f) {
154; CHECK-LABEL: f8:
155; CHECK: ltdbr %f0, %f0
156; CHECK-NEXT: je
157; CHECK: lgr %r2, %r3
158; CHECK: br %r14
159  %cond = fcmp oeq double %f, 0.0
160  %res = select i1 %cond, i64 %a, i64 %b
161  ret i64 %res
162}
163
164; Check the comparison can be reversed if that allows CDB to be used,
165define i64 @f9(i64 %a, i64 %b, double %f2, double *%ptr) {
166; CHECK-LABEL: f9:
167; CHECK: cdb %f0, 0(%r4)
168; CHECK-NEXT: jl {{\.L.*}}
169; CHECK: lgr %r2, %r3
170; CHECK: br %r14
171  %f1 = load double *%ptr
172  %cond = fcmp ogt double %f1, %f2
173  %res = select i1 %cond, i64 %a, i64 %b
174  ret i64 %res
175}
176