| ; Test 32-bit floating-point strict subtraction. |
| ; |
| ; 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() |
| declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata) |
| |
| ; Check register subtraction. |
| define float @f1(float %f1, float %f2) #0 { |
| ; CHECK-LABEL: f1: |
| ; CHECK: sebr %f0, %f2 |
| ; CHECK: br %r14 |
| %res = call float @llvm.experimental.constrained.fsub.f32( |
| float %f1, float %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret float %res |
| } |
| |
| ; Check the low end of the SEB range. |
| define float @f2(float %f1, ptr %ptr) #0 { |
| ; CHECK-LABEL: f2: |
| ; CHECK: seb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %f2 = load float, ptr %ptr |
| %res = call float @llvm.experimental.constrained.fsub.f32( |
| float %f1, float %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret float %res |
| } |
| |
| ; Check the high end of the aligned SEB range. |
| define float @f3(float %f1, ptr %base) #0 { |
| ; CHECK-LABEL: f3: |
| ; CHECK: seb %f0, 4092(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr float, ptr %base, i64 1023 |
| %f2 = load float, ptr %ptr |
| %res = call float @llvm.experimental.constrained.fsub.f32( |
| float %f1, float %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| 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) #0 { |
| ; CHECK-LABEL: f4: |
| ; CHECK: aghi %r2, 4096 |
| ; CHECK: seb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr float, ptr %base, i64 1024 |
| %f2 = load float, ptr %ptr |
| %res = call float @llvm.experimental.constrained.fsub.f32( |
| float %f1, float %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret float %res |
| } |
| |
| ; Check negative displacements, which also need separate address logic. |
| define float @f5(float %f1, ptr %base) #0 { |
| ; CHECK-LABEL: f5: |
| ; CHECK: aghi %r2, -4 |
| ; CHECK: seb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr float, ptr %base, i64 -1 |
| %f2 = load float, ptr %ptr |
| %res = call float @llvm.experimental.constrained.fsub.f32( |
| float %f1, float %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret float %res |
| } |
| |
| ; Check that SEB allows indices. |
| define float @f6(float %f1, ptr %base, i64 %index) #0 { |
| ; CHECK-LABEL: f6: |
| ; CHECK: sllg %r1, %r3, 2 |
| ; CHECK: seb %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 = call float @llvm.experimental.constrained.fsub.f32( |
| float %f1, float %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret float %res |
| } |
| |
| ; Check that subtractions of spilled values can use SEB rather than SEBR. |
| define float @f7(ptr %ptr0) #0 { |
| ; CHECK-LABEL: f7: |
| ; CHECK: brasl %r14, foo@PLT |
| ; CHECK-SCALAR: seb %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() #0 |
| |
| %sub0 = call float @llvm.experimental.constrained.fsub.f32( |
| float %ret, float %val0, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub1 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub0, float %val1, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub2 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub1, float %val2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub3 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub2, float %val3, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub4 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub3, float %val4, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub5 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub4, float %val5, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub6 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub5, float %val6, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub7 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub6, float %val7, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub8 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub7, float %val8, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub9 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub8, float %val9, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub10 = call float @llvm.experimental.constrained.fsub.f32( |
| float %sub9, float %val10, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| |
| ret float %sub10 |
| } |
| |
| attributes #0 = { strictfp } |