1 ; Test 64-bit floating-point comparison. The tests assume a z10 implementation
2 ; of select, using conditional branches rather than LOCGR.
4 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
8 ; Check comparison with registers.
9 define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
11 ; CHECK: cdbr %f0, %f2
15 %cond = fcmp oeq double %f1, %f2
16 %res = select i1 %cond, i64 %a, i64 %b
20 ; Check the low end of the CDB range.
21 define i64 @f2(i64 %a, i64 %b, double %f1, double *%ptr) {
23 ; CHECK: cdb %f0, 0(%r4)
27 %f2 = load double *%ptr
28 %cond = fcmp oeq double %f1, %f2
29 %res = select i1 %cond, i64 %a, i64 %b
33 ; Check the high end of the aligned CDB range.
34 define i64 @f3(i64 %a, i64 %b, double %f1, double *%base) {
36 ; CHECK: cdb %f0, 4088(%r4)
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
47 ; Check the next doubleword up, which needs separate address logic.
48 ; Other sequences besides this one would be OK.
49 define i64 @f4(i64 %a, i64 %b, double %f1, double *%base) {
51 ; CHECK: aghi %r4, 4096
52 ; CHECK: cdb %f0, 0(%r4)
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
63 ; Check negative displacements, which also need separate address logic.
64 define i64 @f5(i64 %a, i64 %b, double %f1, double *%base) {
67 ; CHECK: cdb %f0, 0(%r4)
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
78 ; Check that CDB allows indices.
79 define i64 @f6(i64 %a, i64 %b, double %f1, double *%base, i64 %index) {
81 ; CHECK: sllg %r1, %r5, 3
82 ; CHECK: cdb %f0, 800(%r1,%r4)
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
94 ; Check that comparisons of spilled values can use CDB rather than CDBR.
95 define double @f7(double *%ptr0) {
97 ; CHECK: brasl %r14, foo@PLT
98 ; CHECK: cdb {{%f[0-9]+}}, 160(%r15)
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
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
123 %ret = call double @foo()
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
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
152 ; Check comparison with zero.
153 define i64 @f8(i64 %a, i64 %b, double %f) {
155 ; CHECK: ltdbr %f0, %f0
157 ; CHECK: lgr %r2, %r3
159 %cond = fcmp oeq double %f, 0.0
160 %res = select i1 %cond, i64 %a, i64 %b
164 ; Check the comparison can be reversed if that allows CDB to be used,
165 define i64 @f9(i64 %a, i64 %b, double %f2, double *%ptr) {
167 ; CHECK: cdb %f0, 0(%r4)
168 ; CHECK-NEXT: jl {{\.L.*}}
169 ; CHECK: lgr %r2, %r3
171 %f1 = load double *%ptr
172 %cond = fcmp ogt double %f1, %f2
173 %res = select i1 %cond, i64 %a, i64 %b