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 6 declare double @foo() 7 8 ; Check comparison with registers. 9 define 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. 21 define 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. 34 define 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. 49 define 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. 64 define 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. 79 define 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. 95 define 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. 153 define 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, 165 define 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
