| ; Test 32-bit floating-point division. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \ |
| ; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s |
| |
| declare float @foo() |
| |
| ; Check register division. |
| define float @f1(float %f1, float %f2) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: debr %f0, %f2 |
| ; CHECK: br %r14 |
| %res = fdiv float %f1, %f2 |
| ret float %res |
| } |
| |
| ; Check the low end of the DEB range. |
| define float @f2(float %f1, ptr %ptr) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: deb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %f2 = load float, ptr %ptr |
| %res = fdiv float %f1, %f2 |
| ret float %res |
| } |
| |
| ; Check the high end of the aligned DEB range. |
| define float @f3(float %f1, ptr %base) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: deb %f0, 4092(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr float, ptr %base, i64 1023 |
| %f2 = load float, ptr %ptr |
| %res = fdiv float %f1, %f2 |
| ret float %res |
| } |
| |
| ; Check the next word up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define float @f4(float %f1, ptr %base) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: aghi %r2, 4096 |
| ; CHECK: deb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr float, ptr %base, i64 1024 |
| %f2 = load float, ptr %ptr |
| %res = fdiv float %f1, %f2 |
| ret float %res |
| } |
| |
| ; Check negative displacements, which also need separate address logic. |
| define float @f5(float %f1, ptr %base) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: aghi %r2, -4 |
| ; CHECK: deb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr float, ptr %base, i64 -1 |
| %f2 = load float, ptr %ptr |
| %res = fdiv float %f1, %f2 |
| ret float %res |
| } |
| |
| ; Check that DEB allows indices. |
| define float @f6(float %f1, ptr %base, i64 %index) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: sllg %r1, %r3, 2 |
| ; CHECK: deb %f0, 400(%r1,%r2) |
| ; CHECK: br %r14 |
| %ptr1 = getelementptr float, ptr %base, i64 %index |
| %ptr2 = getelementptr float, ptr %ptr1, i64 100 |
| %f2 = load float, ptr %ptr2 |
| %res = fdiv float %f1, %f2 |
| ret float %res |
| } |
| |
| ; Check that divisions of spilled values can use DEB rather than DEBR. |
| define float @f7(ptr %ptr0) { |
| ; CHECK-LABEL: f7: |
| ; CHECK: brasl %r14, foo@PLT |
| ; CHECK-SCALAR: deb %f0, 16{{[04]}}(%r15) |
| ; CHECK: br %r14 |
| %ptr1 = getelementptr float, ptr %ptr0, i64 2 |
| %ptr2 = getelementptr float, ptr %ptr0, i64 4 |
| %ptr3 = getelementptr float, ptr %ptr0, i64 6 |
| %ptr4 = getelementptr float, ptr %ptr0, i64 8 |
| %ptr5 = getelementptr float, ptr %ptr0, i64 10 |
| %ptr6 = getelementptr float, ptr %ptr0, i64 12 |
| %ptr7 = getelementptr float, ptr %ptr0, i64 14 |
| %ptr8 = getelementptr float, ptr %ptr0, i64 16 |
| %ptr9 = getelementptr float, ptr %ptr0, i64 18 |
| %ptr10 = getelementptr float, ptr %ptr0, i64 20 |
| |
| %val0 = load float, ptr %ptr0 |
| %val1 = load float, ptr %ptr1 |
| %val2 = load float, ptr %ptr2 |
| %val3 = load float, ptr %ptr3 |
| %val4 = load float, ptr %ptr4 |
| %val5 = load float, ptr %ptr5 |
| %val6 = load float, ptr %ptr6 |
| %val7 = load float, ptr %ptr7 |
| %val8 = load float, ptr %ptr8 |
| %val9 = load float, ptr %ptr9 |
| %val10 = load float, ptr %ptr10 |
| |
| %ret = call float @foo() |
| |
| %div0 = fdiv float %ret, %val0 |
| %div1 = fdiv float %div0, %val1 |
| %div2 = fdiv float %div1, %val2 |
| %div3 = fdiv float %div2, %val3 |
| %div4 = fdiv float %div3, %val4 |
| %div5 = fdiv float %div4, %val5 |
| %div6 = fdiv float %div5, %val6 |
| %div7 = fdiv float %div6, %val7 |
| %div8 = fdiv float %div7, %val8 |
| %div9 = fdiv float %div8, %val9 |
| %div10 = fdiv float %div9, %val10 |
| |
| ret float %div10 |
| } |