1 files changed, 83 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/fp-mul-02.ll b/test/CodeGen/SystemZ/fp-mul-02.ll
new file mode 100644
index 0000000..ec51a4c
--- /dev/null
+++ b/test/CodeGen/SystemZ/fp-mul-02.ll
@@ -0,0 +1,83 @@
+; Test multiplication of two f32s, producing an f64 result.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check register multiplication.
+define double @f1(float %f1, float %f2) {
+; CHECK: f1:
+; CHECK: mdebr %f0, %f2
+; CHECK: br %r14
+  %f1x = fpext float %f1 to double
+  %f2x = fpext float %f2 to double
+  %res = fmul double %f1x, %f2x
+  ret double %res
+}
+
+; Check the low end of the MDEB range.
+define double @f2(float %f1, float *%ptr) {
+; CHECK: f2:
+; CHECK: mdeb %f0, 0(%r2)
+; CHECK: br %r14
+  %f2 = load float *%ptr
+  %f1x = fpext float %f1 to double
+  %f2x = fpext float %f2 to double
+  %res = fmul double %f1x, %f2x
+  ret double %res
+}
+
+; Check the high end of the aligned MDEB range.
+define double @f3(float %f1, float *%base) {
+; CHECK: f3:
+; CHECK: mdeb %f0, 4092(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 1023
+  %f2 = load float *%ptr
+  %f1x = fpext float %f1 to double
+  %f2x = fpext float %f2 to double
+  %res = fmul double %f1x, %f2x
+  ret double %res
+}
+
+; Check the next word up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define double @f4(float %f1, float *%base) {
+; CHECK: f4:
+; CHECK: aghi %r2, 4096
+; CHECK: mdeb %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 1024
+  %f2 = load float *%ptr
+  %f1x = fpext float %f1 to double
+  %f2x = fpext float %f2 to double
+  %res = fmul double %f1x, %f2x
+  ret double %res
+}
+
+; Check negative displacements, which also need separate address logic.
+define double @f5(float %f1, float *%base) {
+; CHECK: f5:
+; CHECK: aghi %r2, -4
+; CHECK: mdeb %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 -1
+  %f2 = load float *%ptr
+  %f1x = fpext float %f1 to double
+  %f2x = fpext float %f2 to double
+  %res = fmul double %f1x, %f2x
+  ret double %res
+}
+
+; Check that MDEB allows indices.
+define double @f6(float %f1, float *%base, i64 %index) {
+; CHECK: f6:
+; CHECK: sllg %r1, %r3, 2
+; CHECK: mdeb %f0, 400(%r1,%r2)
+; CHECK: br %r14
+  %ptr1 = getelementptr float *%base, i64 %index
+  %ptr2 = getelementptr float *%ptr1, i64 100
+  %f2 = load float *%ptr2
+  %f1x = fpext float %f1 to double
+  %f2x = fpext float %f2 to double
+  %res = fmul double %f1x, %f2x
+  ret double %res
+}