1 files changed, 71 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/fp-div-02.ll b/test/CodeGen/SystemZ/fp-div-02.ll
new file mode 100644
index 0000000..c5cae15
--- /dev/null
+++ b/test/CodeGen/SystemZ/fp-div-02.ll
@@ -0,0 +1,71 @@
+; Test 64-bit floating-point division.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check register division.
+define double @f1(double %f1, double %f2) {
+; CHECK: f1:
+; CHECK: ddbr %f0, %f2
+; CHECK: br %r14
+  %res = fdiv double %f1, %f2
+  ret double %res
+}
+
+; Check the low end of the DDB range.
+define double @f2(double %f1, double *%ptr) {
+; CHECK: f2:
+; CHECK: ddb %f0, 0(%r2)
+; CHECK: br %r14
+  %f2 = load double *%ptr
+  %res = fdiv double %f1, %f2
+  ret double %res
+}
+
+; Check the high end of the aligned DDB range.
+define double @f3(double %f1, double *%base) {
+; CHECK: f3:
+; CHECK: ddb %f0, 4088(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 511
+  %f2 = load double *%ptr
+  %res = fdiv double %f1, %f2
+  ret double %res
+}
+
+; Check the next doubleword up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define double @f4(double %f1, double *%base) {
+; CHECK: f4:
+; CHECK: aghi %r2, 4096
+; CHECK: ddb %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 512
+  %f2 = load double *%ptr
+  %res = fdiv double %f1, %f2
+  ret double %res
+}
+
+; Check negative displacements, which also need separate address logic.
+define double @f5(double %f1, double *%base) {
+; CHECK: f5:
+; CHECK: aghi %r2, -8
+; CHECK: ddb %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 -1
+  %f2 = load double *%ptr
+  %res = fdiv double %f1, %f2
+  ret double %res
+}
+
+; Check that DDB allows indices.
+define double @f6(double %f1, double *%base, i64 %index) {
+; CHECK: f6:
+; CHECK: sllg %r1, %r3, 3
+; CHECK: ddb %f0, 800(%r1,%r2)
+; CHECK: br %r14
+  %ptr1 = getelementptr double *%base, i64 %index
+  %ptr2 = getelementptr double *%ptr1, i64 100
+  %f2 = load double *%ptr2
+  %res = fdiv double %f1, %f2
+  ret double %res
+}