176 lines
6.7 KiB
LLVM
176 lines
6.7 KiB
LLVM
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; Test 32-bit floating-point strict 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=z14 | FileCheck %s
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declare float @foo()
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declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata)
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; Check register subtraction.
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define float @f1(float %f1, float %f2) #0 {
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; CHECK-LABEL: f1:
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; CHECK: sebr %f0, %f2
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; CHECK: br %r14
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%res = call float @llvm.experimental.constrained.fsub.f32(
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float %f1, float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %res
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}
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; Check the low end of the SEB range.
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define float @f2(float %f1, float *%ptr) #0 {
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; CHECK-LABEL: f2:
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; CHECK: seb %f0, 0(%r2)
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; CHECK: br %r14
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%f2 = load float, float *%ptr
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%res = call float @llvm.experimental.constrained.fsub.f32(
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float %f1, float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %res
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}
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; Check the high end of the aligned SEB range.
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define float @f3(float %f1, float *%base) #0 {
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; CHECK-LABEL: f3:
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; CHECK: seb %f0, 4092(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float, float *%base, i64 1023
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%f2 = load float, float *%ptr
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%res = call float @llvm.experimental.constrained.fsub.f32(
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float %f1, float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %res
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define float @f4(float %f1, float *%base) #0 {
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; CHECK-LABEL: f4:
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; CHECK: aghi %r2, 4096
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; CHECK: seb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float, float *%base, i64 1024
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%f2 = load float, float *%ptr
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%res = call float @llvm.experimental.constrained.fsub.f32(
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float %f1, float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %res
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}
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; Check negative displacements, which also need separate address logic.
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define float @f5(float %f1, float *%base) #0 {
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; CHECK-LABEL: f5:
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; CHECK: aghi %r2, -4
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; CHECK: seb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float, float *%base, i64 -1
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%f2 = load float, float *%ptr
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%res = call float @llvm.experimental.constrained.fsub.f32(
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float %f1, float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %res
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}
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; Check that SEB allows indices.
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define float @f6(float %f1, float *%base, i64 %index) #0 {
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; CHECK-LABEL: f6:
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; CHECK: sllg %r1, %r3, 2
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; CHECK: seb %f0, 400(%r1,%r2)
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; CHECK: br %r14
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%ptr1 = getelementptr float, float *%base, i64 %index
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%ptr2 = getelementptr float, float *%ptr1, i64 100
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%f2 = load float, float *%ptr2
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%res = call float @llvm.experimental.constrained.fsub.f32(
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float %f1, float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %res
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}
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; Check that subtractions of spilled values can use SEB rather than SEBR.
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define float @f7(float *%ptr0) #0 {
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; CHECK-LABEL: f7:
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; CHECK: brasl %r14, foo@PLT
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; CHECK-SCALAR: seb %f0, 16{{[04]}}(%r15)
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; CHECK: br %r14
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%ptr1 = getelementptr float, float *%ptr0, i64 2
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%ptr2 = getelementptr float, float *%ptr0, i64 4
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%ptr3 = getelementptr float, float *%ptr0, i64 6
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%ptr4 = getelementptr float, float *%ptr0, i64 8
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%ptr5 = getelementptr float, float *%ptr0, i64 10
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%ptr6 = getelementptr float, float *%ptr0, i64 12
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%ptr7 = getelementptr float, float *%ptr0, i64 14
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%ptr8 = getelementptr float, float *%ptr0, i64 16
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%ptr9 = getelementptr float, float *%ptr0, i64 18
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%ptr10 = getelementptr float, float *%ptr0, i64 20
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%val0 = load float, float *%ptr0
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%val1 = load float, float *%ptr1
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%val2 = load float, float *%ptr2
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%val3 = load float, float *%ptr3
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%val4 = load float, float *%ptr4
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%val5 = load float, float *%ptr5
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%val6 = load float, float *%ptr6
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%val7 = load float, float *%ptr7
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%val8 = load float, float *%ptr8
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%val9 = load float, float *%ptr9
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%val10 = load float, float *%ptr10
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%ret = call float @foo() #0
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%sub0 = call float @llvm.experimental.constrained.fsub.f32(
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float %ret, float %val0,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub1 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub0, float %val1,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub2 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub1, float %val2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub3 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub2, float %val3,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub4 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub3, float %val4,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub5 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub4, float %val5,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub6 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub5, float %val6,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub7 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub6, float %val7,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub8 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub7, float %val8,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub9 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub8, float %val9,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sub10 = call float @llvm.experimental.constrained.fsub.f32(
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float %sub9, float %val10,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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ret float %sub10
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}
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attributes #0 = { strictfp }
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