; 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, float *%ptr) #0 {
; CHECK-LABEL: f2:
; CHECK: seb %f0, 0(%r2)
; CHECK: br %r14
%f2 = load float, float *%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, float *%base) #0 {
; CHECK-LABEL: f3:
; CHECK: seb %f0, 4092(%r2)
; CHECK: br %r14
%ptr = getelementptr float, float *%base, i64 1023
%f2 = load float, float *%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, float *%base) #0 {
; CHECK-LABEL: f4:
; CHECK: aghi %r2, 4096
; CHECK: seb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr float, float *%base, i64 1024
%f2 = load float, float *%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, float *%base) #0 {
; CHECK-LABEL: f5:
; CHECK: aghi %r2, -4
; CHECK: seb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr float, float *%base, i64 -1
%f2 = load float, float *%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, float *%base, i64 %index) #0 {
; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r3, 2
; CHECK: seb %f0, 400(%r1,%r2)
; CHECK: br %r14
%ptr1 = getelementptr float, float *%base, i64 %index
%ptr2 = getelementptr float, float *%ptr1, i64 100
%f2 = load float, float *%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(float *%ptr0) #0 {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK-SCALAR: seb %f0, 16{{[04]}}(%r15)
; CHECK: br %r14
%ptr1 = getelementptr float, float *%ptr0, i64 2
%ptr2 = getelementptr float, float *%ptr0, i64 4
%ptr3 = getelementptr float, float *%ptr0, i64 6
%ptr4 = getelementptr float, float *%ptr0, i64 8
%ptr5 = getelementptr float, float *%ptr0, i64 10
%ptr6 = getelementptr float, float *%ptr0, i64 12
%ptr7 = getelementptr float, float *%ptr0, i64 14
%ptr8 = getelementptr float, float *%ptr0, i64 16
%ptr9 = getelementptr float, float *%ptr0, i64 18
%ptr10 = getelementptr float, float *%ptr0, i64 20
%val0 = load float, float *%ptr0
%val1 = load float, float *%ptr1
%val2 = load float, float *%ptr2
%val3 = load float, float *%ptr3
%val4 = load float, float *%ptr4
%val5 = load float, float *%ptr5
%val6 = load float, float *%ptr6
%val7 = load float, float *%ptr7
%val8 = load float, float *%ptr8
%val9 = load float, float *%ptr9
%val10 = load float, float *%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 }