1; Test strict 64-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=z13 | FileCheck %s 6 7declare double @foo() 8declare double @llvm.experimental.constrained.fdiv.f64(double, double, metadata, metadata) 9 10; Check register division. 11define double @f1(double %f1, double %f2) #0 { 12; CHECK-LABEL: f1: 13; CHECK: ddbr %f0, %f2 14; CHECK: br %r14 15 %res = call double @llvm.experimental.constrained.fdiv.f64( 16 double %f1, double %f2, 17 metadata !"round.dynamic", 18 metadata !"fpexcept.strict") #0 19 ret double %res 20} 21 22; Check the low end of the DDB range. 23define double @f2(double %f1, double *%ptr) #0 { 24; CHECK-LABEL: f2: 25; CHECK: ddb %f0, 0(%r2) 26; CHECK: br %r14 27 %f2 = load double, double *%ptr 28 %res = call double @llvm.experimental.constrained.fdiv.f64( 29 double %f1, double %f2, 30 metadata !"round.dynamic", 31 metadata !"fpexcept.strict") #0 32 ret double %res 33} 34 35; Check the high end of the aligned DDB range. 36define double @f3(double %f1, double *%base) #0 { 37; CHECK-LABEL: f3: 38; CHECK: ddb %f0, 4088(%r2) 39; CHECK: br %r14 40 %ptr = getelementptr double, double *%base, i64 511 41 %f2 = load double, double *%ptr 42 %res = call double @llvm.experimental.constrained.fdiv.f64( 43 double %f1, double %f2, 44 metadata !"round.dynamic", 45 metadata !"fpexcept.strict") #0 46 ret double %res 47} 48 49; Check the next doubleword up, which needs separate address logic. 50; Other sequences besides this one would be OK. 51define double @f4(double %f1, double *%base) #0 { 52; CHECK-LABEL: f4: 53; CHECK: aghi %r2, 4096 54; CHECK: ddb %f0, 0(%r2) 55; CHECK: br %r14 56 %ptr = getelementptr double, double *%base, i64 512 57 %f2 = load double, double *%ptr 58 %res = call double @llvm.experimental.constrained.fdiv.f64( 59 double %f1, double %f2, 60 metadata !"round.dynamic", 61 metadata !"fpexcept.strict") #0 62 ret double %res 63} 64 65; Check negative displacements, which also need separate address logic. 66define double @f5(double %f1, double *%base) #0 { 67; CHECK-LABEL: f5: 68; CHECK: aghi %r2, -8 69; CHECK: ddb %f0, 0(%r2) 70; CHECK: br %r14 71 %ptr = getelementptr double, double *%base, i64 -1 72 %f2 = load double, double *%ptr 73 %res = call double @llvm.experimental.constrained.fdiv.f64( 74 double %f1, double %f2, 75 metadata !"round.dynamic", 76 metadata !"fpexcept.strict") #0 77 ret double %res 78} 79 80; Check that DDB allows indices. 81define double @f6(double %f1, double *%base, i64 %index) #0 { 82; CHECK-LABEL: f6: 83; CHECK: sllg %r1, %r3, 3 84; CHECK: ddb %f0, 800(%r1,%r2) 85; CHECK: br %r14 86 %ptr1 = getelementptr double, double *%base, i64 %index 87 %ptr2 = getelementptr double, double *%ptr1, i64 100 88 %f2 = load double, double *%ptr2 89 %res = call double @llvm.experimental.constrained.fdiv.f64( 90 double %f1, double %f2, 91 metadata !"round.dynamic", 92 metadata !"fpexcept.strict") #0 93 ret double %res 94} 95 96; Check that divisions of spilled values can use DDB rather than DDBR. 97define double @f7(double *%ptr0) #0 { 98; CHECK-LABEL: f7: 99; CHECK: brasl %r14, foo@PLT 100; CHECK-SCALAR: ddb %f0, 160(%r15) 101; CHECK: br %r14 102 %ptr1 = getelementptr double, double *%ptr0, i64 2 103 %ptr2 = getelementptr double, double *%ptr0, i64 4 104 %ptr3 = getelementptr double, double *%ptr0, i64 6 105 %ptr4 = getelementptr double, double *%ptr0, i64 8 106 %ptr5 = getelementptr double, double *%ptr0, i64 10 107 %ptr6 = getelementptr double, double *%ptr0, i64 12 108 %ptr7 = getelementptr double, double *%ptr0, i64 14 109 %ptr8 = getelementptr double, double *%ptr0, i64 16 110 %ptr9 = getelementptr double, double *%ptr0, i64 18 111 %ptr10 = getelementptr double, double *%ptr0, i64 20 112 113 %val0 = load double, double *%ptr0 114 %val1 = load double, double *%ptr1 115 %val2 = load double, double *%ptr2 116 %val3 = load double, double *%ptr3 117 %val4 = load double, double *%ptr4 118 %val5 = load double, double *%ptr5 119 %val6 = load double, double *%ptr6 120 %val7 = load double, double *%ptr7 121 %val8 = load double, double *%ptr8 122 %val9 = load double, double *%ptr9 123 %val10 = load double, double *%ptr10 124 125 %ret = call double @foo() #0 126 127 %div0 = call double @llvm.experimental.constrained.fdiv.f64( 128 double %ret, double %val0, 129 metadata !"round.dynamic", 130 metadata !"fpexcept.strict") #0 131 %div1 = call double @llvm.experimental.constrained.fdiv.f64( 132 double %div0, double %val1, 133 metadata !"round.dynamic", 134 metadata !"fpexcept.strict") #0 135 %div2 = call double @llvm.experimental.constrained.fdiv.f64( 136 double %div1, double %val2, 137 metadata !"round.dynamic", 138 metadata !"fpexcept.strict") #0 139 %div3 = call double @llvm.experimental.constrained.fdiv.f64( 140 double %div2, double %val3, 141 metadata !"round.dynamic", 142 metadata !"fpexcept.strict") #0 143 %div4 = call double @llvm.experimental.constrained.fdiv.f64( 144 double %div3, double %val4, 145 metadata !"round.dynamic", 146 metadata !"fpexcept.strict") #0 147 %div5 = call double @llvm.experimental.constrained.fdiv.f64( 148 double %div4, double %val5, 149 metadata !"round.dynamic", 150 metadata !"fpexcept.strict") #0 151 %div6 = call double @llvm.experimental.constrained.fdiv.f64( 152 double %div5, double %val6, 153 metadata !"round.dynamic", 154 metadata !"fpexcept.strict") #0 155 %div7 = call double @llvm.experimental.constrained.fdiv.f64( 156 double %div6, double %val7, 157 metadata !"round.dynamic", 158 metadata !"fpexcept.strict") #0 159 %div8 = call double @llvm.experimental.constrained.fdiv.f64( 160 double %div7, double %val8, 161 metadata !"round.dynamic", 162 metadata !"fpexcept.strict") #0 163 %div9 = call double @llvm.experimental.constrained.fdiv.f64( 164 double %div8, double %val9, 165 metadata !"round.dynamic", 166 metadata !"fpexcept.strict") #0 167 %div10 = call double @llvm.experimental.constrained.fdiv.f64( 168 double %div9, double %val10, 169 metadata !"round.dynamic", 170 metadata !"fpexcept.strict") #0 171 172 ret double %div10 173} 174 175attributes #0 = { strictfp } 176