1; Test 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() 8 9; Check register division. 10define double @f1(double %f1, double %f2) { 11; CHECK-LABEL: f1: 12; CHECK: ddbr %f0, %f2 13; CHECK: br %r14 14 %res = fdiv double %f1, %f2 15 ret double %res 16} 17 18; Check the low end of the DDB range. 19define double @f2(double %f1, double *%ptr) { 20; CHECK-LABEL: f2: 21; CHECK: ddb %f0, 0(%r2) 22; CHECK: br %r14 23 %f2 = load double , double *%ptr 24 %res = fdiv double %f1, %f2 25 ret double %res 26} 27 28; Check the high end of the aligned DDB range. 29define double @f3(double %f1, double *%base) { 30; CHECK-LABEL: f3: 31; CHECK: ddb %f0, 4088(%r2) 32; CHECK: br %r14 33 %ptr = getelementptr double, double *%base, i64 511 34 %f2 = load double , double *%ptr 35 %res = fdiv 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: ddb %f0, 0(%r2) 45; CHECK: br %r14 46 %ptr = getelementptr double, double *%base, i64 512 47 %f2 = load double , double *%ptr 48 %res = fdiv 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: ddb %f0, 0(%r2) 57; CHECK: br %r14 58 %ptr = getelementptr double, double *%base, i64 -1 59 %f2 = load double , double *%ptr 60 %res = fdiv double %f1, %f2 61 ret double %res 62} 63 64; Check that DDB allows indices. 65define double @f6(double %f1, double *%base, i64 %index) { 66; CHECK-LABEL: f6: 67; CHECK: sllg %r1, %r3, 3 68; CHECK: ddb %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 = fdiv double %f1, %f2 74 ret double %res 75} 76 77; Check that divisions of spilled values can use DDB rather than DDBR. 78define double @f7(double *%ptr0) { 79; CHECK-LABEL: f7: 80; CHECK: brasl %r14, foo@PLT 81; CHECK-SCALAR: ddb %f0, 160(%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 %div0 = fdiv double %ret, %val0 109 %div1 = fdiv double %div0, %val1 110 %div2 = fdiv double %div1, %val2 111 %div3 = fdiv double %div2, %val3 112 %div4 = fdiv double %div3, %val4 113 %div5 = fdiv double %div4, %val5 114 %div6 = fdiv double %div5, %val6 115 %div7 = fdiv double %div6, %val7 116 %div8 = fdiv double %div7, %val8 117 %div9 = fdiv double %div8, %val9 118 %div10 = fdiv double %div9, %val10 119 120 ret double %div10 121} 122