fp-div-01.ll
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; Test 32-bit floating-point division.
;
; 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 division.
define float @f1(float %f1, float %f2) {
; CHECK-LABEL: f1:
; CHECK: debr %f0, %f2
; CHECK: br %r14
%res = fdiv float %f1, %f2
ret float %res
}
; Check the low end of the DEB range.
define float @f2(float %f1, float *%ptr) {
; CHECK-LABEL: f2:
; CHECK: deb %f0, 0(%r2)
; CHECK: br %r14
%f2 = load float, float *%ptr
%res = fdiv float %f1, %f2
ret float %res
}
; Check the high end of the aligned DEB range.
define float @f3(float %f1, float *%base) {
; CHECK-LABEL: f3:
; CHECK: deb %f0, 4092(%r2)
; CHECK: br %r14
%ptr = getelementptr float, float *%base, i64 1023
%f2 = load float, float *%ptr
%res = fdiv 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, float *%base) {
; CHECK-LABEL: f4:
; CHECK: aghi %r2, 4096
; CHECK: deb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr float, float *%base, i64 1024
%f2 = load float, float *%ptr
%res = fdiv float %f1, %f2
ret float %res
}
; Check negative displacements, which also need separate address logic.
define float @f5(float %f1, float *%base) {
; CHECK-LABEL: f5:
; CHECK: aghi %r2, -4
; CHECK: deb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr float, float *%base, i64 -1
%f2 = load float, float *%ptr
%res = fdiv float %f1, %f2
ret float %res
}
; Check that DEB allows indices.
define float @f6(float %f1, float *%base, i64 %index) {
; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r3, 2
; CHECK: deb %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 = fdiv float %f1, %f2
ret float %res
}
; Check that divisions of spilled values can use DEB rather than DEBR.
define float @f7(float *%ptr0) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK-SCALAR: deb %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()
%div0 = fdiv float %ret, %val0
%div1 = fdiv float %div0, %val1
%div2 = fdiv float %div1, %val2
%div3 = fdiv float %div2, %val3
%div4 = fdiv float %div3, %val4
%div5 = fdiv float %div4, %val5
%div6 = fdiv float %div5, %val6
%div7 = fdiv float %div6, %val7
%div8 = fdiv float %div7, %val8
%div9 = fdiv float %div8, %val9
%div10 = fdiv float %div9, %val10
ret float %div10
}