1; Test 64-bit floating-point subtraction.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5declare double @foo()
6
7; Check register subtraction.
8define double @f1(double %f1, double %f2) {
9; CHECK-LABEL: f1:
10; CHECK: sdbr %f0, %f2
11; CHECK: br %r14
12  %res = fsub double %f1, %f2
13  ret double %res
14}
15
16; Check the low end of the SDB range.
17define double @f2(double %f1, double *%ptr) {
18; CHECK-LABEL: f2:
19; CHECK: sdb %f0, 0(%r2)
20; CHECK: br %r14
21  %f2 = load double , double *%ptr
22  %res = fsub double %f1, %f2
23  ret double %res
24}
25
26; Check the high end of the aligned SDB range.
27define double @f3(double %f1, double *%base) {
28; CHECK-LABEL: f3:
29; CHECK: sdb %f0, 4088(%r2)
30; CHECK: br %r14
31  %ptr = getelementptr double, double *%base, i64 511
32  %f2 = load double , double *%ptr
33  %res = fsub double %f1, %f2
34  ret double %res
35}
36
37; Check the next doubleword up, which needs separate address logic.
38; Other sequences besides this one would be OK.
39define double @f4(double %f1, double *%base) {
40; CHECK-LABEL: f4:
41; CHECK: aghi %r2, 4096
42; CHECK: sdb %f0, 0(%r2)
43; CHECK: br %r14
44  %ptr = getelementptr double, double *%base, i64 512
45  %f2 = load double , double *%ptr
46  %res = fsub double %f1, %f2
47  ret double %res
48}
49
50; Check negative displacements, which also need separate address logic.
51define double @f5(double %f1, double *%base) {
52; CHECK-LABEL: f5:
53; CHECK: aghi %r2, -8
54; CHECK: sdb %f0, 0(%r2)
55; CHECK: br %r14
56  %ptr = getelementptr double, double *%base, i64 -1
57  %f2 = load double , double *%ptr
58  %res = fsub double %f1, %f2
59  ret double %res
60}
61
62; Check that SDB allows indices.
63define double @f6(double %f1, double *%base, i64 %index) {
64; CHECK-LABEL: f6:
65; CHECK: sllg %r1, %r3, 3
66; CHECK: sdb %f0, 800(%r1,%r2)
67; CHECK: br %r14
68  %ptr1 = getelementptr double, double *%base, i64 %index
69  %ptr2 = getelementptr double, double *%ptr1, i64 100
70  %f2 = load double , double *%ptr2
71  %res = fsub double %f1, %f2
72  ret double %res
73}
74
75; Check that subtractions of spilled values can use SDB rather than SDBR.
76define double @f7(double *%ptr0) {
77; CHECK-LABEL: f7:
78; CHECK: brasl %r14, foo@PLT
79; CHECK: sdb %f0, 16{{[04]}}(%r15)
80; CHECK: br %r14
81  %ptr1 = getelementptr double, double *%ptr0, i64 2
82  %ptr2 = getelementptr double, double *%ptr0, i64 4
83  %ptr3 = getelementptr double, double *%ptr0, i64 6
84  %ptr4 = getelementptr double, double *%ptr0, i64 8
85  %ptr5 = getelementptr double, double *%ptr0, i64 10
86  %ptr6 = getelementptr double, double *%ptr0, i64 12
87  %ptr7 = getelementptr double, double *%ptr0, i64 14
88  %ptr8 = getelementptr double, double *%ptr0, i64 16
89  %ptr9 = getelementptr double, double *%ptr0, i64 18
90  %ptr10 = getelementptr double, double *%ptr0, i64 20
91
92  %val0 = load double , double *%ptr0
93  %val1 = load double , double *%ptr1
94  %val2 = load double , double *%ptr2
95  %val3 = load double , double *%ptr3
96  %val4 = load double , double *%ptr4
97  %val5 = load double , double *%ptr5
98  %val6 = load double , double *%ptr6
99  %val7 = load double , double *%ptr7
100  %val8 = load double , double *%ptr8
101  %val9 = load double , double *%ptr9
102  %val10 = load double , double *%ptr10
103
104  %ret = call double @foo()
105
106  %sub0 = fsub double %ret, %val0
107  %sub1 = fsub double %sub0, %val1
108  %sub2 = fsub double %sub1, %val2
109  %sub3 = fsub double %sub2, %val3
110  %sub4 = fsub double %sub3, %val4
111  %sub5 = fsub double %sub4, %val5
112  %sub6 = fsub double %sub5, %val6
113  %sub7 = fsub double %sub6, %val7
114  %sub8 = fsub double %sub7, %val8
115  %sub9 = fsub double %sub8, %val9
116  %sub10 = fsub double %sub9, %val10
117
118  ret double %sub10
119}
120