1; Test 64-bit floating-point subtraction.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \
4; RUN:   | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s
5; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
6
7declare double @foo()
8
9; Check register subtraction.
10define double @f1(double %f1, double %f2) {
11; CHECK-LABEL: f1:
12; CHECK: sdbr %f0, %f2
13; CHECK: br %r14
14  %res = fsub double %f1, %f2
15  ret double %res
16}
17
18; Check the low end of the SDB range.
19define double @f2(double %f1, double *%ptr) {
20; CHECK-LABEL: f2:
21; CHECK: sdb %f0, 0(%r2)
22; CHECK: br %r14
23  %f2 = load double , double *%ptr
24  %res = fsub double %f1, %f2
25  ret double %res
26}
27
28; Check the high end of the aligned SDB range.
29define double @f3(double %f1, double *%base) {
30; CHECK-LABEL: f3:
31; CHECK: sdb %f0, 4088(%r2)
32; CHECK: br %r14
33  %ptr = getelementptr double, double *%base, i64 511
34  %f2 = load double , double *%ptr
35  %res = fsub double %f1, %f2
36  ret double %res
37}
38
39; Check the next doubleword up, which needs separate address logic.
40; Other sequences besides this one would be OK.
41define double @f4(double %f1, double *%base) {
42; CHECK-LABEL: f4:
43; CHECK: aghi %r2, 4096
44; CHECK: sdb %f0, 0(%r2)
45; CHECK: br %r14
46  %ptr = getelementptr double, double *%base, i64 512
47  %f2 = load double , double *%ptr
48  %res = fsub double %f1, %f2
49  ret double %res
50}
51
52; Check negative displacements, which also need separate address logic.
53define double @f5(double %f1, double *%base) {
54; CHECK-LABEL: f5:
55; CHECK: aghi %r2, -8
56; CHECK: sdb %f0, 0(%r2)
57; CHECK: br %r14
58  %ptr = getelementptr double, double *%base, i64 -1
59  %f2 = load double , double *%ptr
60  %res = fsub double %f1, %f2
61  ret double %res
62}
63
64; Check that SDB allows indices.
65define double @f6(double %f1, double *%base, i64 %index) {
66; CHECK-LABEL: f6:
67; CHECK: sllg %r1, %r3, 3
68; CHECK: sdb %f0, 800(%r1,%r2)
69; CHECK: br %r14
70  %ptr1 = getelementptr double, double *%base, i64 %index
71  %ptr2 = getelementptr double, double *%ptr1, i64 100
72  %f2 = load double , double *%ptr2
73  %res = fsub double %f1, %f2
74  ret double %res
75}
76
77; Check that subtractions of spilled values can use SDB rather than SDBR.
78define double @f7(double *%ptr0) {
79; CHECK-LABEL: f7:
80; CHECK: brasl %r14, foo@PLT
81; CHECK-SCALAR: sdb %f0, 16{{[04]}}(%r15)
82; CHECK: br %r14
83  %ptr1 = getelementptr double, double *%ptr0, i64 2
84  %ptr2 = getelementptr double, double *%ptr0, i64 4
85  %ptr3 = getelementptr double, double *%ptr0, i64 6
86  %ptr4 = getelementptr double, double *%ptr0, i64 8
87  %ptr5 = getelementptr double, double *%ptr0, i64 10
88  %ptr6 = getelementptr double, double *%ptr0, i64 12
89  %ptr7 = getelementptr double, double *%ptr0, i64 14
90  %ptr8 = getelementptr double, double *%ptr0, i64 16
91  %ptr9 = getelementptr double, double *%ptr0, i64 18
92  %ptr10 = getelementptr double, double *%ptr0, i64 20
93
94  %val0 = load double , double *%ptr0
95  %val1 = load double , double *%ptr1
96  %val2 = load double , double *%ptr2
97  %val3 = load double , double *%ptr3
98  %val4 = load double , double *%ptr4
99  %val5 = load double , double *%ptr5
100  %val6 = load double , double *%ptr6
101  %val7 = load double , double *%ptr7
102  %val8 = load double , double *%ptr8
103  %val9 = load double , double *%ptr9
104  %val10 = load double , double *%ptr10
105
106  %ret = call double @foo()
107
108  %sub0 = fsub double %ret, %val0
109  %sub1 = fsub double %sub0, %val1
110  %sub2 = fsub double %sub1, %val2
111  %sub3 = fsub double %sub2, %val3
112  %sub4 = fsub double %sub3, %val4
113  %sub5 = fsub double %sub4, %val5
114  %sub6 = fsub double %sub5, %val6
115  %sub7 = fsub double %sub6, %val7
116  %sub8 = fsub double %sub7, %val8
117  %sub9 = fsub double %sub8, %val9
118  %sub10 = fsub double %sub9, %val10
119
120  ret double %sub10
121}
122