1 files changed, 89 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/fp-conv-04.ll b/test/CodeGen/SystemZ/fp-conv-04.ll
new file mode 100644
index 0000000..b7b5166
--- /dev/null
+++ b/test/CodeGen/SystemZ/fp-conv-04.ll
@@ -0,0 +1,89 @@
+; Test extensions of f64 to f128.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check register extension.
+define void @f1(fp128 *%dst, double %val) {
+; CHECK: f1:
+; CHECK: lxdbr %f0, %f0
+; CHECK: std %f0, 0(%r2)
+; CHECK: std %f2, 8(%r2)
+; CHECK: br %r14
+  %res = fpext double %val to fp128
+  store fp128 %res, fp128 *%dst
+  ret void
+}
+
+; Check the low end of the LXDB range.
+define void @f2(fp128 *%dst, double *%ptr) {
+; CHECK: f2:
+; CHECK: lxdb %f0, 0(%r3)
+; CHECK: std %f0, 0(%r2)
+; CHECK: std %f2, 8(%r2)
+; CHECK: br %r14
+  %val = load double *%ptr
+  %res = fpext double %val to fp128
+  store fp128 %res, fp128 *%dst
+  ret void
+}
+
+; Check the high end of the aligned LXDB range.
+define void @f3(fp128 *%dst, double *%base) {
+; CHECK: f3:
+; CHECK: lxdb %f0, 4088(%r3)
+; CHECK: std %f0, 0(%r2)
+; CHECK: std %f2, 8(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 511
+  %val = load double *%ptr
+  %res = fpext double %val to fp128
+  store fp128 %res, fp128 *%dst
+  ret void
+}
+
+; Check the next doubleword up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define void @f4(fp128 *%dst, double *%base) {
+; CHECK: f4:
+; CHECK: aghi %r3, 4096
+; CHECK: lxdb %f0, 0(%r3)
+; CHECK: std %f0, 0(%r2)
+; CHECK: std %f2, 8(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 512
+  %val = load double *%ptr
+  %res = fpext double %val to fp128
+  store fp128 %res, fp128 *%dst
+  ret void
+}
+
+; Check negative displacements, which also need separate address logic.
+define void @f5(fp128 *%dst, double *%base) {
+; CHECK: f5:
+; CHECK: aghi %r3, -8
+; CHECK: lxdb %f0, 0(%r3)
+; CHECK: std %f0, 0(%r2)
+; CHECK: std %f2, 8(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 -1
+  %val = load double *%ptr
+  %res = fpext double %val to fp128
+  store fp128 %res, fp128 *%dst
+  ret void
+}
+
+; Check that LXDB allows indices.
+define void @f6(fp128 *%dst, double *%base, i64 %index) {
+; CHECK: f6:
+; CHECK: sllg %r1, %r4, 3
+; CHECK: lxdb %f0, 800(%r1,%r3)
+; CHECK: std %f0, 0(%r2)
+; CHECK: std %f2, 8(%r2)
+; CHECK: br %r14
+  %ptr1 = getelementptr double *%base, i64 %index
+  %ptr2 = getelementptr double *%ptr1, i64 100
+  %val = load double *%ptr2
+  %res = fpext double %val to fp128
+  store fp128 %res, fp128 *%dst
+  ret void
+}