| ; Test strict 64-bit floating-point 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=z13 | FileCheck %s |
| |
| declare double @foo() |
| declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata) |
| |
| ; Check register subtraction. |
| define double @f1(double %f1, double %f2) #0 { |
| ; CHECK-LABEL: f1: |
| ; CHECK: sdbr %f0, %f2 |
| ; CHECK: br %r14 |
| %res = call double @llvm.experimental.constrained.fsub.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check the low end of the SDB range. |
| define double @f2(double %f1, double *%ptr) #0 { |
| ; CHECK-LABEL: f2: |
| ; CHECK: sdb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %f2 = load double, double *%ptr |
| %res = call double @llvm.experimental.constrained.fsub.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check the high end of the aligned SDB range. |
| define double @f3(double %f1, double *%base) #0 { |
| ; CHECK-LABEL: f3: |
| ; CHECK: sdb %f0, 4088(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr double, double *%base, i64 511 |
| %f2 = load double, double *%ptr |
| %res = call double @llvm.experimental.constrained.fsub.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, double *%base) #0 { |
| ; CHECK-LABEL: f4: |
| ; CHECK: aghi %r2, 4096 |
| ; CHECK: sdb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr double, double *%base, i64 512 |
| %f2 = load double, double *%ptr |
| %res = call double @llvm.experimental.constrained.fsub.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, double *%base) #0 { |
| ; CHECK-LABEL: f5: |
| ; CHECK: aghi %r2, -8 |
| ; CHECK: sdb %f0, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr double, double *%base, i64 -1 |
| %f2 = load double, double *%ptr |
| %res = call double @llvm.experimental.constrained.fsub.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check that SDB allows indices. |
| define double @f6(double %f1, double *%base, i64 %index) #0 { |
| ; CHECK-LABEL: f6: |
| ; CHECK: sllg %r1, %r3, 3 |
| ; CHECK: sdb %f0, 800(%r1,%r2) |
| ; CHECK: br %r14 |
| %ptr1 = getelementptr double, double *%base, i64 %index |
| %ptr2 = getelementptr double, double *%ptr1, i64 100 |
| %f2 = load double, double *%ptr2 |
| %res = call double @llvm.experimental.constrained.fsub.f64( |
| double %f1, double %f2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| ret double %res |
| } |
| |
| ; Check that subtractions of spilled values can use SDB rather than SDBR. |
| define double @f7(double *%ptr0) #0 { |
| ; CHECK-LABEL: f7: |
| ; CHECK: brasl %r14, foo@PLT |
| ; CHECK-SCALAR: sdb %f0, 16{{[04]}}(%r15) |
| ; CHECK: br %r14 |
| %ptr1 = getelementptr double, double *%ptr0, i64 2 |
| %ptr2 = getelementptr double, double *%ptr0, i64 4 |
| %ptr3 = getelementptr double, double *%ptr0, i64 6 |
| %ptr4 = getelementptr double, double *%ptr0, i64 8 |
| %ptr5 = getelementptr double, double *%ptr0, i64 10 |
| %ptr6 = getelementptr double, double *%ptr0, i64 12 |
| %ptr7 = getelementptr double, double *%ptr0, i64 14 |
| %ptr8 = getelementptr double, double *%ptr0, i64 16 |
| %ptr9 = getelementptr double, double *%ptr0, i64 18 |
| %ptr10 = getelementptr double, double *%ptr0, i64 20 |
| |
| %val0 = load double, double *%ptr0 |
| %val1 = load double, double *%ptr1 |
| %val2 = load double, double *%ptr2 |
| %val3 = load double, double *%ptr3 |
| %val4 = load double, double *%ptr4 |
| %val5 = load double, double *%ptr5 |
| %val6 = load double, double *%ptr6 |
| %val7 = load double, double *%ptr7 |
| %val8 = load double, double *%ptr8 |
| %val9 = load double, double *%ptr9 |
| %val10 = load double, double *%ptr10 |
| |
| %ret = call double @foo() #0 |
| |
| %sub0 = call double @llvm.experimental.constrained.fsub.f64( |
| double %ret, double %val0, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub1 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub0, double %val1, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub2 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub1, double %val2, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub3 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub2, double %val3, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub4 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub3, double %val4, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub5 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub4, double %val5, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub6 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub5, double %val6, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub7 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub6, double %val7, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub8 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub7, double %val8, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub9 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub8, double %val9, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %sub10 = call double @llvm.experimental.constrained.fsub.f64( |
| double %sub9, double %val10, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| |
| ret double %sub10 |
| } |
| |
| attributes #0 = { strictfp } |