; Test 32-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=z14 | FileCheck %s
declare float @foo()
; Check register subtraction.
define float @f1(float %f1, float %f2) {
; CHECK-LABEL: f1:
; CHECK: sebr %f0, %f2
; CHECK: br %r14
%res = fsub float %f1, %f2
ret float %res
}
; Check the low end of the SEB range.
define float @f2(float %f1, ptr %ptr) {
; CHECK-LABEL: f2:
; CHECK: seb %f0, 0(%r2)
; CHECK: br %r14
%f2 = load float, ptr %ptr
%res = fsub float %f1, %f2
ret float %res
}
; Check the high end of the aligned SEB range.
define float @f3(float %f1, ptr %base) {
; CHECK-LABEL: f3:
; CHECK: seb %f0, 4092(%r2)
; CHECK: br %r14
%ptr = getelementptr float, ptr %base, i64 1023
%f2 = load float, ptr %ptr
%res = fsub float %f1, %f2
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, ptr %base) {
; CHECK-LABEL: f4:
; CHECK: aghi %r2, 4096
; CHECK: seb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr float, ptr %base, i64 1024
%f2 = load float, ptr %ptr
%res = fsub float %f1, %f2
ret float %res
}
; Check negative displacements, which also need separate address logic.
define float @f5(float %f1, ptr %base) {
; CHECK-LABEL: f5:
; CHECK: aghi %r2, -4
; CHECK: seb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr float, ptr %base, i64 -1
%f2 = load float, ptr %ptr
%res = fsub float %f1, %f2
ret float %res
}
; Check that SEB allows indices.
define float @f6(float %f1, ptr %base, i64 %index) {
; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r3, 2
; CHECK: seb %f0, 400(%r1,%r2)
; CHECK: br %r14
%ptr1 = getelementptr float, ptr %base, i64 %index
%ptr2 = getelementptr float, ptr %ptr1, i64 100
%f2 = load float, ptr %ptr2
%res = fsub float %f1, %f2
ret float %res
}
; Check that subtractions of spilled values can use SEB rather than SEBR.
define float @f7(ptr %ptr0) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK-SCALAR: seb %f0, 16{{[04]}}(%r15)
; CHECK: br %r14
%ptr1 = getelementptr float, ptr %ptr0, i64 2
%ptr2 = getelementptr float, ptr %ptr0, i64 4
%ptr3 = getelementptr float, ptr %ptr0, i64 6
%ptr4 = getelementptr float, ptr %ptr0, i64 8
%ptr5 = getelementptr float, ptr %ptr0, i64 10
%ptr6 = getelementptr float, ptr %ptr0, i64 12
%ptr7 = getelementptr float, ptr %ptr0, i64 14
%ptr8 = getelementptr float, ptr %ptr0, i64 16
%ptr9 = getelementptr float, ptr %ptr0, i64 18
%ptr10 = getelementptr float, ptr %ptr0, i64 20
%val0 = load float, ptr %ptr0
%val1 = load float, ptr %ptr1
%val2 = load float, ptr %ptr2
%val3 = load float, ptr %ptr3
%val4 = load float, ptr %ptr4
%val5 = load float, ptr %ptr5
%val6 = load float, ptr %ptr6
%val7 = load float, ptr %ptr7
%val8 = load float, ptr %ptr8
%val9 = load float, ptr %ptr9
%val10 = load float, ptr %ptr10
%ret = call float @foo()
%sub0 = fsub float %ret, %val0
%sub1 = fsub float %sub0, %val1
%sub2 = fsub float %sub1, %val2
%sub3 = fsub float %sub2, %val3
%sub4 = fsub float %sub3, %val4
%sub5 = fsub float %sub4, %val5
%sub6 = fsub float %sub5, %val6
%sub7 = fsub float %sub6, %val7
%sub8 = fsub float %sub7, %val8
%sub9 = fsub float %sub8, %val9
%sub10 = fsub float %sub9, %val10
ret float %sub10
}
; Check that reassociation flags do not get in the way of SEB.
define float @f8(ptr %x) {
; CHECK-LABEL: f8:
; CHECK: seb %f0
entry:
%0 = load float, ptr %x, align 8
%arrayidx1 = getelementptr inbounds float, ptr %x, i64 1
%1 = load float, ptr %arrayidx1, align 8
%add = fsub reassoc nsz arcp contract afn float %1, %0
ret float %add
}
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