1; Test 32-bit floating-point division.
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=z14 | FileCheck %s
6
7declare float @foo()
8
9; Check register division.
10define float @f1(float %f1, float %f2) {
11; CHECK-LABEL: f1:
12; CHECK: debr %f0, %f2
13; CHECK: br %r14
14  %res = fdiv float %f1, %f2
15  ret float %res
16}
17
18; Check the low end of the DEB range.
19define float @f2(float %f1, float *%ptr) {
20; CHECK-LABEL: f2:
21; CHECK: deb %f0, 0(%r2)
22; CHECK: br %r14
23  %f2 = load float, float *%ptr
24  %res = fdiv float %f1, %f2
25  ret float %res
26}
27
28; Check the high end of the aligned DEB range.
29define float @f3(float %f1, float *%base) {
30; CHECK-LABEL: f3:
31; CHECK: deb %f0, 4092(%r2)
32; CHECK: br %r14
33  %ptr = getelementptr float, float *%base, i64 1023
34  %f2 = load float, float *%ptr
35  %res = fdiv float %f1, %f2
36  ret float %res
37}
38
39; Check the next word up, which needs separate address logic.
40; Other sequences besides this one would be OK.
41define float @f4(float %f1, float *%base) {
42; CHECK-LABEL: f4:
43; CHECK: aghi %r2, 4096
44; CHECK: deb %f0, 0(%r2)
45; CHECK: br %r14
46  %ptr = getelementptr float, float *%base, i64 1024
47  %f2 = load float, float *%ptr
48  %res = fdiv float %f1, %f2
49  ret float %res
50}
51
52; Check negative displacements, which also need separate address logic.
53define float @f5(float %f1, float *%base) {
54; CHECK-LABEL: f5:
55; CHECK: aghi %r2, -4
56; CHECK: deb %f0, 0(%r2)
57; CHECK: br %r14
58  %ptr = getelementptr float, float *%base, i64 -1
59  %f2 = load float, float *%ptr
60  %res = fdiv float %f1, %f2
61  ret float %res
62}
63
64; Check that DEB allows indices.
65define float @f6(float %f1, float *%base, i64 %index) {
66; CHECK-LABEL: f6:
67; CHECK: sllg %r1, %r3, 2
68; CHECK: deb %f0, 400(%r1,%r2)
69; CHECK: br %r14
70  %ptr1 = getelementptr float, float *%base, i64 %index
71  %ptr2 = getelementptr float, float *%ptr1, i64 100
72  %f2 = load float, float *%ptr2
73  %res = fdiv float %f1, %f2
74  ret float %res
75}
76
77; Check that divisions of spilled values can use DEB rather than DEBR.
78define float @f7(float *%ptr0) {
79; CHECK-LABEL: f7:
80; CHECK: brasl %r14, foo@PLT
81; CHECK-SCALAR: deb %f0, 16{{[04]}}(%r15)
82; CHECK: br %r14
83  %ptr1 = getelementptr float, float *%ptr0, i64 2
84  %ptr2 = getelementptr float, float *%ptr0, i64 4
85  %ptr3 = getelementptr float, float *%ptr0, i64 6
86  %ptr4 = getelementptr float, float *%ptr0, i64 8
87  %ptr5 = getelementptr float, float *%ptr0, i64 10
88  %ptr6 = getelementptr float, float *%ptr0, i64 12
89  %ptr7 = getelementptr float, float *%ptr0, i64 14
90  %ptr8 = getelementptr float, float *%ptr0, i64 16
91  %ptr9 = getelementptr float, float *%ptr0, i64 18
92  %ptr10 = getelementptr float, float *%ptr0, i64 20
93
94  %val0 = load float, float *%ptr0
95  %val1 = load float, float *%ptr1
96  %val2 = load float, float *%ptr2
97  %val3 = load float, float *%ptr3
98  %val4 = load float, float *%ptr4
99  %val5 = load float, float *%ptr5
100  %val6 = load float, float *%ptr6
101  %val7 = load float, float *%ptr7
102  %val8 = load float, float *%ptr8
103  %val9 = load float, float *%ptr9
104  %val10 = load float, float *%ptr10
105
106  %ret = call float @foo()
107
108  %div0 = fdiv float %ret, %val0
109  %div1 = fdiv float %div0, %val1
110  %div2 = fdiv float %div1, %val2
111  %div3 = fdiv float %div2, %val3
112  %div4 = fdiv float %div3, %val4
113  %div5 = fdiv float %div4, %val5
114  %div6 = fdiv float %div5, %val6
115  %div7 = fdiv float %div6, %val7
116  %div8 = fdiv float %div7, %val8
117  %div9 = fdiv float %div8, %val9
118  %div10 = fdiv float %div9, %val10
119
120  ret float %div10
121}
122