1 files changed, 165 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-mul-10.ll b/test/CodeGen/SystemZ/int-mul-10.ll
new file mode 100644
index 000000000000..a4d80af36a3c
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-mul-10.ll
@@ -0,0 +1,165 @@
+; Test signed high-part i64->i128 multiplications on z14.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s
+
+declare i64 @foo()
+
+; Check sign-extended multiplication in which only the high part is used.
+define i64 @f1(i64 %dummy, i64 %a, i64 %b) {
+; CHECK-LABEL: f1:
+; CHECK-NOT: {{%r[234]}}
+; CHECK: mgrk %r2, %r3, %r4
+; CHECK: br %r14
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check sign-extended multiplication in which only part of the high half
+; is used.
+define i64 @f2(i64 %dummy, i64 %a, i64 %b) {
+; CHECK-LABEL: f2:
+; CHECK-NOT: {{%r[234]}}
+; CHECK: mgrk [[REG:%r[0-9]+]], %r3, %r4
+; CHECK: srlg %r2, [[REG]], 3
+; CHECK: br %r14
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 67
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check sign-extended multiplication in which the result is split into
+; high and low halves.
+define i64 @f3(i64 %dummy, i64 %a, i64 %b) {
+; CHECK-LABEL: f3:
+; CHECK-NOT: {{%r[234]}}
+; CHECK: mgrk %r2, %r3, %r4
+; CHECK: ogr %r2, %r3
+; CHECK: br %r14
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  %low = trunc i128 %mulx to i64
+  %or = or i64 %high, %low
+  ret i64 %or
+}
+
+; Check MG with no displacement.
+define i64 @f4(i64 %dummy, i64 %a, i64 *%src) {
+; CHECK-LABEL: f4:
+; CHECK-NOT: {{%r[234]}}
+; CHECK: mg %r2, 0(%r4)
+; CHECK: br %r14
+  %b = load i64 , i64 *%src
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check the high end of the aligned MG range.
+define i64 @f5(i64 %dummy, i64 %a, i64 *%src) {
+; CHECK-LABEL: f5:
+; CHECK: mg %r2, 524280(%r4)
+; CHECK: br %r14
+  %ptr = getelementptr i64, i64 *%src, i64 65535
+  %b = load i64 , i64 *%ptr
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check the next doubleword up, which requires separate address logic.
+; Other sequences besides this one would be OK.
+define i64 @f6(i64 %dummy, i64 %a, i64 *%src) {
+; CHECK-LABEL: f6:
+; CHECK: agfi %r4, 524288
+; CHECK: mg %r2, 0(%r4)
+; CHECK: br %r14
+  %ptr = getelementptr i64, i64 *%src, i64 65536
+  %b = load i64 , i64 *%ptr
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check the high end of the negative aligned MG range.
+define i64 @f7(i64 %dummy, i64 %a, i64 *%src) {
+; CHECK-LABEL: f7:
+; CHECK: mg %r2, -8(%r4)
+; CHECK: br %r14
+  %ptr = getelementptr i64, i64 *%src, i64 -1
+  %b = load i64 , i64 *%ptr
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check the low end of the MG range.
+define i64 @f8(i64 %dummy, i64 %a, i64 *%src) {
+; CHECK-LABEL: f8:
+; CHECK: mg %r2, -524288(%r4)
+; CHECK: br %r14
+  %ptr = getelementptr i64, i64 *%src, i64 -65536
+  %b = load i64 , i64 *%ptr
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check the next doubleword down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i64 @f9(i64 *%dest, i64 %a, i64 *%src) {
+; CHECK-LABEL: f9:
+; CHECK: agfi %r4, -524296
+; CHECK: mg %r2, 0(%r4)
+; CHECK: br %r14
+  %ptr = getelementptr i64, i64 *%src, i64 -65537
+  %b = load i64 , i64 *%ptr
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+
+; Check that MG allows an index.
+define i64 @f10(i64 *%dest, i64 %a, i64 %src, i64 %index) {
+; CHECK-LABEL: f10:
+; CHECK: mg %r2, 524287(%r5,%r4)
+; CHECK: br %r14
+  %add1 = add i64 %src, %index
+  %add2 = add i64 %add1, 524287
+  %ptr = inttoptr i64 %add2 to i64 *
+  %b = load i64 , i64 *%ptr
+  %ax = sext i64 %a to i128
+  %bx = sext i64 %b to i128
+  %mulx = mul i128 %ax, %bx
+  %highx = lshr i128 %mulx, 64
+  %high = trunc i128 %highx to i64
+  ret i64 %high
+}
+