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1; Test signed high-part i64->i128 multiplications on z14.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -asm-verbose=0 | FileCheck %s
4
5declare i64 @foo()
6
7; Check sign-extended multiplication in which only the high part is used.
8define i64 @f1(i64 %dummy, i64 %a, i64 %b) {
9; CHECK-LABEL: f1:
10; CHECK-NOT: {{%r[234]}}
11; CHECK: mgrk %r2, %r3, %r4
12; CHECK: br %r14
13  %ax = sext i64 %a to i128
14  %bx = sext i64 %b to i128
15  %mulx = mul i128 %ax, %bx
16  %highx = lshr i128 %mulx, 64
17  %high = trunc i128 %highx to i64
18  ret i64 %high
19}
20
21; Check sign-extended multiplication in which only part of the high half
22; is used.
23define i64 @f2(i64 %dummy, i64 %a, i64 %b) {
24; CHECK-LABEL: f2:
25; CHECK-NOT: {{%r[234]}}
26; CHECK: mgrk [[REG:%r[0-9]+]], %r3, %r4
27; CHECK: srlg %r2, [[REG]], 3
28; CHECK: br %r14
29  %ax = sext i64 %a to i128
30  %bx = sext i64 %b to i128
31  %mulx = mul i128 %ax, %bx
32  %highx = lshr i128 %mulx, 67
33  %high = trunc i128 %highx to i64
34  ret i64 %high
35}
36
37; Check sign-extended multiplication in which the result is split into
38; high and low halves.
39define i64 @f3(i64 %dummy, i64 %a, i64 %b) {
40; CHECK-LABEL: f3:
41; CHECK-NOT: {{%r[234]}}
42; CHECK: mgrk %r2, %r3, %r4
43; CHECK: ogr %r2, %r3
44; CHECK: br %r14
45  %ax = sext i64 %a to i128
46  %bx = sext i64 %b to i128
47  %mulx = mul i128 %ax, %bx
48  %highx = lshr i128 %mulx, 64
49  %high = trunc i128 %highx to i64
50  %low = trunc i128 %mulx to i64
51  %or = or i64 %high, %low
52  ret i64 %or
53}
54
55; Check MG with no displacement.
56define i64 @f4(i64 %dummy, i64 %a, i64 *%src) {
57; CHECK-LABEL: f4:
58; CHECK-NOT: {{%r[234]}}
59; CHECK: mg %r2, 0(%r4)
60; CHECK: br %r14
61  %b = load i64, i64 *%src
62  %ax = sext i64 %a to i128
63  %bx = sext i64 %b to i128
64  %mulx = mul i128 %ax, %bx
65  %highx = lshr i128 %mulx, 64
66  %high = trunc i128 %highx to i64
67  ret i64 %high
68}
69
70; Check the high end of the aligned MG range.
71define i64 @f5(i64 %dummy, i64 %a, i64 *%src) {
72; CHECK-LABEL: f5:
73; CHECK: mg %r2, 524280(%r4)
74; CHECK: br %r14
75  %ptr = getelementptr i64, i64 *%src, i64 65535
76  %b = load i64, i64 *%ptr
77  %ax = sext i64 %a to i128
78  %bx = sext i64 %b to i128
79  %mulx = mul i128 %ax, %bx
80  %highx = lshr i128 %mulx, 64
81  %high = trunc i128 %highx to i64
82  ret i64 %high
83}
84
85; Check the next doubleword up, which requires separate address logic.
86; Other sequences besides this one would be OK.
87define i64 @f6(i64 %dummy, i64 %a, i64 *%src) {
88; CHECK-LABEL: f6:
89; CHECK: agfi %r4, 524288
90; CHECK: mg %r2, 0(%r4)
91; CHECK: br %r14
92  %ptr = getelementptr i64, i64 *%src, i64 65536
93  %b = load i64, i64 *%ptr
94  %ax = sext i64 %a to i128
95  %bx = sext i64 %b to i128
96  %mulx = mul i128 %ax, %bx
97  %highx = lshr i128 %mulx, 64
98  %high = trunc i128 %highx to i64
99  ret i64 %high
100}
101
102; Check the high end of the negative aligned MG range.
103define i64 @f7(i64 %dummy, i64 %a, i64 *%src) {
104; CHECK-LABEL: f7:
105; CHECK: mg %r2, -8(%r4)
106; CHECK: br %r14
107  %ptr = getelementptr i64, i64 *%src, i64 -1
108  %b = load i64, i64 *%ptr
109  %ax = sext i64 %a to i128
110  %bx = sext i64 %b to i128
111  %mulx = mul i128 %ax, %bx
112  %highx = lshr i128 %mulx, 64
113  %high = trunc i128 %highx to i64
114  ret i64 %high
115}
116
117; Check the low end of the MG range.
118define i64 @f8(i64 %dummy, i64 %a, i64 *%src) {
119; CHECK-LABEL: f8:
120; CHECK: mg %r2, -524288(%r4)
121; CHECK: br %r14
122  %ptr = getelementptr i64, i64 *%src, i64 -65536
123  %b = load i64, i64 *%ptr
124  %ax = sext i64 %a to i128
125  %bx = sext i64 %b to i128
126  %mulx = mul i128 %ax, %bx
127  %highx = lshr i128 %mulx, 64
128  %high = trunc i128 %highx to i64
129  ret i64 %high
130}
131
132; Check the next doubleword down, which needs separate address logic.
133; Other sequences besides this one would be OK.
134define i64 @f9(i64 *%dest, i64 %a, i64 *%src) {
135; CHECK-LABEL: f9:
136; CHECK: agfi %r4, -524296
137; CHECK: mg %r2, 0(%r4)
138; CHECK: br %r14
139  %ptr = getelementptr i64, i64 *%src, i64 -65537
140  %b = load i64, i64 *%ptr
141  %ax = sext i64 %a to i128
142  %bx = sext i64 %b to i128
143  %mulx = mul i128 %ax, %bx
144  %highx = lshr i128 %mulx, 64
145  %high = trunc i128 %highx to i64
146  ret i64 %high
147}
148
149; Check that MG allows an index.
150define i64 @f10(i64 *%dest, i64 %a, i64 %src, i64 %index) {
151; CHECK-LABEL: f10:
152; CHECK: mg %r2, 524287(%r5,%r4)
153; CHECK: br %r14
154  %add1 = add i64 %src, %index
155  %add2 = add i64 %add1, 524287
156  %ptr = inttoptr i64 %add2 to i64 *
157  %b = load i64, i64 *%ptr
158  %ax = sext i64 %a to i128
159  %bx = sext i64 %b to i128
160  %mulx = mul i128 %ax, %bx
161  %highx = lshr i128 %mulx, 64
162  %high = trunc i128 %highx to i64
163  ret i64 %high
164}
165
166