1 ; Test 32-bit floating-point subtraction. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 declare float @foo() 6 7 ; Check register subtraction. 8 define float @f1(float %f1, float %f2) { 9 ; CHECK-LABEL: f1: 10 ; CHECK: sebr %f0, %f2 11 ; CHECK: br %r14 12 %res = fsub float %f1, %f2 13 ret float %res 14 } 15 16 ; Check the low end of the SEB range. 17 define float @f2(float %f1, float *%ptr) { 18 ; CHECK-LABEL: f2: 19 ; CHECK: seb %f0, 0(%r2) 20 ; CHECK: br %r14 21 %f2 = load float *%ptr 22 %res = fsub float %f1, %f2 23 ret float %res 24 } 25 26 ; Check the high end of the aligned SEB range. 27 define float @f3(float %f1, float *%base) { 28 ; CHECK-LABEL: f3: 29 ; CHECK: seb %f0, 4092(%r2) 30 ; CHECK: br %r14 31 %ptr = getelementptr float *%base, i64 1023 32 %f2 = load float *%ptr 33 %res = fsub float %f1, %f2 34 ret float %res 35 } 36 37 ; Check the next word up, which needs separate address logic. 38 ; Other sequences besides this one would be OK. 39 define float @f4(float %f1, float *%base) { 40 ; CHECK-LABEL: f4: 41 ; CHECK: aghi %r2, 4096 42 ; CHECK: seb %f0, 0(%r2) 43 ; CHECK: br %r14 44 %ptr = getelementptr float *%base, i64 1024 45 %f2 = load float *%ptr 46 %res = fsub float %f1, %f2 47 ret float %res 48 } 49 50 ; Check negative displacements, which also need separate address logic. 51 define float @f5(float %f1, float *%base) { 52 ; CHECK-LABEL: f5: 53 ; CHECK: aghi %r2, -4 54 ; CHECK: seb %f0, 0(%r2) 55 ; CHECK: br %r14 56 %ptr = getelementptr float *%base, i64 -1 57 %f2 = load float *%ptr 58 %res = fsub float %f1, %f2 59 ret float %res 60 } 61 62 ; Check that SEB allows indices. 63 define float @f6(float %f1, float *%base, i64 %index) { 64 ; CHECK-LABEL: f6: 65 ; CHECK: sllg %r1, %r3, 2 66 ; CHECK: seb %f0, 400(%r1,%r2) 67 ; CHECK: br %r14 68 %ptr1 = getelementptr float *%base, i64 %index 69 %ptr2 = getelementptr float *%ptr1, i64 100 70 %f2 = load float *%ptr2 71 %res = fsub float %f1, %f2 72 ret float %res 73 } 74 75 ; Check that subtractions of spilled values can use SEB rather than SEBR. 76 define float @f7(float *%ptr0) { 77 ; CHECK-LABEL: f7: 78 ; CHECK: brasl %r14, foo@PLT 79 ; CHECK: seb %f0, 16{{[04]}}(%r15) 80 ; CHECK: br %r14 81 %ptr1 = getelementptr float *%ptr0, i64 2 82 %ptr2 = getelementptr float *%ptr0, i64 4 83 %ptr3 = getelementptr float *%ptr0, i64 6 84 %ptr4 = getelementptr float *%ptr0, i64 8 85 %ptr5 = getelementptr float *%ptr0, i64 10 86 %ptr6 = getelementptr float *%ptr0, i64 12 87 %ptr7 = getelementptr float *%ptr0, i64 14 88 %ptr8 = getelementptr float *%ptr0, i64 16 89 %ptr9 = getelementptr float *%ptr0, i64 18 90 %ptr10 = getelementptr float *%ptr0, i64 20 91 92 %val0 = load float *%ptr0 93 %val1 = load float *%ptr1 94 %val2 = load float *%ptr2 95 %val3 = load float *%ptr3 96 %val4 = load float *%ptr4 97 %val5 = load float *%ptr5 98 %val6 = load float *%ptr6 99 %val7 = load float *%ptr7 100 %val8 = load float *%ptr8 101 %val9 = load float *%ptr9 102 %val10 = load float *%ptr10 103 104 %ret = call float @foo() 105 106 %sub0 = fsub float %ret, %val0 107 %sub1 = fsub float %sub0, %val1 108 %sub2 = fsub float %sub1, %val2 109 %sub3 = fsub float %sub2, %val3 110 %sub4 = fsub float %sub3, %val4 111 %sub5 = fsub float %sub4, %val5 112 %sub6 = fsub float %sub5, %val6 113 %sub7 = fsub float %sub6, %val7 114 %sub8 = fsub float %sub7, %val8 115 %sub9 = fsub float %sub8, %val9 116 %sub10 = fsub float %sub9, %val10 117 118 ret float %sub10 119 } 120
