1; Test 64-bit floating-point subtraction. 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 subtraction. 10define double @f1(double %f1, double %f2) { 11; CHECK-LABEL: f1: 12; CHECK: sdbr %f0, %f2 13; CHECK: br %r14 14 %res = fsub double %f1, %f2 15 ret double %res 16} 17 18; Check the low end of the SDB range. 19define double @f2(double %f1, double *%ptr) { 20; CHECK-LABEL: f2: 21; CHECK: sdb %f0, 0(%r2) 22; CHECK: br %r14 23 %f2 = load double, double *%ptr 24 %res = fsub double %f1, %f2 25 ret double %res 26} 27 28; Check the high end of the aligned SDB range. 29define double @f3(double %f1, double *%base) { 30; CHECK-LABEL: f3: 31; CHECK: sdb %f0, 4088(%r2) 32; CHECK: br %r14 33 %ptr = getelementptr double, double *%base, i64 511 34 %f2 = load double, double *%ptr 35 %res = fsub 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: sdb %f0, 0(%r2) 45; CHECK: br %r14 46 %ptr = getelementptr double, double *%base, i64 512 47 %f2 = load double, double *%ptr 48 %res = fsub 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: sdb %f0, 0(%r2) 57; CHECK: br %r14 58 %ptr = getelementptr double, double *%base, i64 -1 59 %f2 = load double, double *%ptr 60 %res = fsub double %f1, %f2 61 ret double %res 62} 63 64; Check that SDB allows indices. 65define double @f6(double %f1, double *%base, i64 %index) { 66; CHECK-LABEL: f6: 67; CHECK: sllg %r1, %r3, 3 68; CHECK: sdb %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 = fsub double %f1, %f2 74 ret double %res 75} 76 77; Check that subtractions of spilled values can use SDB rather than SDBR. 78define double @f7(double *%ptr0) { 79; CHECK-LABEL: f7: 80; CHECK: brasl %r14, foo@PLT 81; CHECK-SCALAR: sdb %f0, 16{{[04]}}(%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 %sub0 = fsub double %ret, %val0 109 %sub1 = fsub double %sub0, %val1 110 %sub2 = fsub double %sub1, %val2 111 %sub3 = fsub double %sub2, %val3 112 %sub4 = fsub double %sub3, %val4 113 %sub5 = fsub double %sub4, %val5 114 %sub6 = fsub double %sub5, %val6 115 %sub7 = fsub double %sub6, %val7 116 %sub8 = fsub double %sub7, %val8 117 %sub9 = fsub double %sub8, %val9 118 %sub10 = fsub double %sub9, %val10 119 120 ret double %sub10 121} 122