176 lines
6.8 KiB
LLVM
176 lines
6.8 KiB
LLVM
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; Test strict 64-bit floating-point subtraction.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \
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; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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declare double @foo()
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declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata)
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; Check register subtraction.
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define double @f1(double %f1, double %f2) #0 {
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; CHECK-LABEL: f1:
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; CHECK: sdbr %f0, %f2
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; CHECK: br %r14
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%res = call double @llvm.experimental.constrained.fsub.f64(
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double %f1, double %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %res
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}
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; Check the low end of the SDB range.
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define double @f2(double %f1, double *%ptr) #0 {
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; CHECK-LABEL: f2:
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; CHECK: sdb %f0, 0(%r2)
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; CHECK: br %r14
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%f2 = load double, double *%ptr
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%res = call double @llvm.experimental.constrained.fsub.f64(
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double %f1, double %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %res
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}
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; Check the high end of the aligned SDB range.
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define double @f3(double %f1, double *%base) #0 {
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; CHECK-LABEL: f3:
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; CHECK: sdb %f0, 4088(%r2)
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; CHECK: br %r14
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%ptr = getelementptr double, double *%base, i64 511
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%f2 = load double, double *%ptr
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%res = call double @llvm.experimental.constrained.fsub.f64(
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double %f1, double %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %res
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}
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; Check the next doubleword up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define double @f4(double %f1, double *%base) #0 {
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; CHECK-LABEL: f4:
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; CHECK: aghi %r2, 4096
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; CHECK: sdb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr double, double *%base, i64 512
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%f2 = load double, double *%ptr
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%res = call double @llvm.experimental.constrained.fsub.f64(
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double %f1, double %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %res
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}
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; Check negative displacements, which also need separate address logic.
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define double @f5(double %f1, double *%base) #0 {
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; CHECK-LABEL: f5:
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; CHECK: aghi %r2, -8
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; CHECK: sdb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr double, double *%base, i64 -1
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%f2 = load double, double *%ptr
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%res = call double @llvm.experimental.constrained.fsub.f64(
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double %f1, double %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %res
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}
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; Check that SDB allows indices.
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define double @f6(double %f1, double *%base, i64 %index) #0 {
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; CHECK-LABEL: f6:
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; CHECK: sllg %r1, %r3, 3
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; CHECK: sdb %f0, 800(%r1,%r2)
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; CHECK: br %r14
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%ptr1 = getelementptr double, double *%base, i64 %index
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%ptr2 = getelementptr double, double *%ptr1, i64 100
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%f2 = load double, double *%ptr2
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%res = call double @llvm.experimental.constrained.fsub.f64(
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double %f1, double %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %res
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}
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; Check that subtractions of spilled values can use SDB rather than SDBR.
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define double @f7(double *%ptr0) #0 {
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; CHECK-LABEL: f7:
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; CHECK: brasl %r14, foo@PLT
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; CHECK-SCALAR: sdb %f0, 16{{[04]}}(%r15)
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; CHECK: br %r14
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%ptr1 = getelementptr double, double *%ptr0, i64 2
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%ptr2 = getelementptr double, double *%ptr0, i64 4
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%ptr3 = getelementptr double, double *%ptr0, i64 6
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%ptr4 = getelementptr double, double *%ptr0, i64 8
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%ptr5 = getelementptr double, double *%ptr0, i64 10
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%ptr6 = getelementptr double, double *%ptr0, i64 12
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%ptr7 = getelementptr double, double *%ptr0, i64 14
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%ptr8 = getelementptr double, double *%ptr0, i64 16
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%ptr9 = getelementptr double, double *%ptr0, i64 18
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%ptr10 = getelementptr double, double *%ptr0, i64 20
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%val0 = load double, double *%ptr0
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%val1 = load double, double *%ptr1
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%val2 = load double, double *%ptr2
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%val3 = load double, double *%ptr3
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%val4 = load double, double *%ptr4
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%val5 = load double, double *%ptr5
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%val6 = load double, double *%ptr6
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%val7 = load double, double *%ptr7
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%val8 = load double, double *%ptr8
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%val9 = load double, double *%ptr9
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%val10 = load double, double *%ptr10
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%ret = call double @foo() #0
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%sub0 = call double @llvm.experimental.constrained.fsub.f64(
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double %ret, double %val0,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub1 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub0, double %val1,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub2 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub1, double %val2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub3 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub2, double %val3,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub4 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub3, double %val4,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub5 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub4, double %val5,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub6 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub5, double %val6,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub7 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub6, double %val7,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub8 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub7, double %val8,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub9 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub8, double %val9,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub10 = call double @llvm.experimental.constrained.fsub.f64(
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double %sub9, double %val10,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret double %sub10
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}
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attributes #0 = { strictfp }
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