| ; Test strict 64-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=z13 | FileCheck %s |
| |
| declare double @foo() |
| declare double @llvm.experimental.constrained.fdiv.f64(double, double, metadata, metadata) |
| |
| ; Check register division. |
| define double @f1(double %f1, double %f2) #0 { |
| ; CHECK-LABEL: f1: |
| ; CHECK: ddbr %f0, %f2 |
| ; CHECK: br %r14 |
| %res = call double @llvm.experimental.constrained.fdiv.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check the low end of the DDB range. |
| define double @f2(double %f1, ptr %ptr) #0 { |
| ; CHECK-LABEL: f2: |
| ; CHECK: ddb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %f2 = load double, ptr %ptr |
| %res = call double @llvm.experimental.constrained.fdiv.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check the high end of the aligned DDB range. |
| define double @f3(double %f1, ptr %base) #0 { |
| ; CHECK-LABEL: f3: |
| ; CHECK: ddb %f0, 4088(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr double, ptr %base, i64 511 |
| %f2 = load double, ptr %ptr |
| %res = call double @llvm.experimental.constrained.fdiv.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check the next doubleword up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define double @f4(double %f1, ptr %base) #0 { |
| ; CHECK-LABEL: f4: |
| ; CHECK: aghi %r2, 4096 |
| ; CHECK: ddb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr double, ptr %base, i64 512 |
| %f2 = load double, ptr %ptr |
| %res = call double @llvm.experimental.constrained.fdiv.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check negative displacements, which also need separate address logic. |
| define double @f5(double %f1, ptr %base) #0 { |
| ; CHECK-LABEL: f5: |
| ; CHECK: aghi %r2, -8 |
| ; CHECK: ddb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr double, ptr %base, i64 -1 |
| %f2 = load double, ptr %ptr |
| %res = call double @llvm.experimental.constrained.fdiv.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check that DDB allows indices. |
| define double @f6(double %f1, ptr %base, i64 %index) #0 { |
| ; CHECK-LABEL: f6: |
| ; CHECK: sllg %r1, %r3, 3 |
| ; CHECK: ddb %f0, 800(%r1,%r2) |
| ; CHECK: br %r14 |
| %ptr1 = getelementptr double, ptr %base, i64 %index |
| %ptr2 = getelementptr double, ptr %ptr1, i64 100 |
| %f2 = load double, ptr %ptr2 |
| %res = call double @llvm.experimental.constrained.fdiv.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check that divisions of spilled values can use DDB rather than DDBR. |
| define double @f7(ptr %ptr0) #0 { |
| ; CHECK-LABEL: f7: |
| ; CHECK: brasl %r14, foo@PLT |
| ; CHECK-SCALAR: ddb %f0, 160(%r15) |
| ; CHECK: br %r14 |
| %ptr1 = getelementptr double, ptr %ptr0, i64 2 |
| %ptr2 = getelementptr double, ptr %ptr0, i64 4 |
| %ptr3 = getelementptr double, ptr %ptr0, i64 6 |
| %ptr4 = getelementptr double, ptr %ptr0, i64 8 |
| %ptr5 = getelementptr double, ptr %ptr0, i64 10 |
| %ptr6 = getelementptr double, ptr %ptr0, i64 12 |
| %ptr7 = getelementptr double, ptr %ptr0, i64 14 |
| %ptr8 = getelementptr double, ptr %ptr0, i64 16 |
| %ptr9 = getelementptr double, ptr %ptr0, i64 18 |
| %ptr10 = getelementptr double, ptr %ptr0, i64 20 |
| |
| %val0 = load double, ptr %ptr0 |
| %val1 = load double, ptr %ptr1 |
| %val2 = load double, ptr %ptr2 |
| %val3 = load double, ptr %ptr3 |
| %val4 = load double, ptr %ptr4 |
| %val5 = load double, ptr %ptr5 |
| %val6 = load double, ptr %ptr6 |
| %val7 = load double, ptr %ptr7 |
| %val8 = load double, ptr %ptr8 |
| %val9 = load double, ptr %ptr9 |
| %val10 = load double, ptr %ptr10 |
| |
| %ret = call double @foo() #0 |
| |
| %div0 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %ret, double %val0, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div1 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div0, double %val1, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div2 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div1, double %val2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div3 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div2, double %val3, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div4 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div3, double %val4, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div5 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div4, double %val5, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div6 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div5, double %val6, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div7 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div6, double %val7, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div8 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div7, double %val8, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div9 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div8, double %val9, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %div10 = call double @llvm.experimental.constrained.fdiv.f64( |
| double %div9, double %val10, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| |
| ret double %div10 |
| } |
| |
| attributes #0 = { strictfp } |