1 /*
2 * Copyright (C) 2023 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "gtest/gtest.h"
18
19 #include "berberis/calling_conventions/calling_conventions_arm64.h"
20
21 namespace berberis::arm64 {
22
23 namespace {
24
TEST(CallingConventions_arm64,Smoke)25 TEST(CallingConventions_arm64, Smoke) {
26 CallingConventions conv;
27 ArgLocation loc;
28
29 loc = conv.GetNextIntArgLoc(4, 4);
30 EXPECT_EQ(loc.kind, kArgLocationInt);
31 EXPECT_EQ(loc.offset, 0u);
32
33 loc = conv.GetNextIntArgLoc(16, 16);
34 EXPECT_EQ(loc.kind, kArgLocationInt);
35 EXPECT_EQ(loc.offset, 2u);
36
37 loc = conv.GetNextIntArgLoc(8, 8);
38 EXPECT_EQ(loc.kind, kArgLocationInt);
39 EXPECT_EQ(loc.offset, 4u);
40
41 loc = conv.GetNextIntArgLoc(16, 16);
42 EXPECT_EQ(loc.kind, kArgLocationInt);
43 EXPECT_EQ(loc.offset, 6u);
44
45 loc = conv.GetNextIntArgLoc(4, 4);
46 EXPECT_EQ(loc.kind, kArgLocationStack);
47 EXPECT_EQ(loc.offset, 0u);
48
49 loc = conv.GetNextIntArgLoc(4, 4);
50 EXPECT_EQ(loc.kind, kArgLocationStack);
51 EXPECT_EQ(loc.offset, 8u);
52
53 loc = conv.GetNextFpArgLoc(16, 16);
54 EXPECT_EQ(loc.kind, kArgLocationSimd);
55 EXPECT_EQ(loc.offset, 0u);
56
57 loc = conv.GetNextFpArgLoc(16, 16);
58 EXPECT_EQ(loc.kind, kArgLocationSimd);
59 EXPECT_EQ(loc.offset, 1u);
60
61 loc = conv.GetIntResLoc(1);
62 EXPECT_EQ(loc.kind, kArgLocationInt);
63 EXPECT_EQ(loc.offset, 0u);
64 }
65
TEST(CallingConventions_arm64,LastIntRegNotUsed)66 TEST(CallingConventions_arm64, LastIntRegNotUsed) {
67 CallingConventions conv;
68 ArgLocation loc;
69
70 // Use 7 of 8 int regs.
71 conv.GetNextIntArgLoc(4, 4);
72 conv.GetNextIntArgLoc(4, 4);
73 conv.GetNextIntArgLoc(4, 4);
74 conv.GetNextIntArgLoc(4, 4);
75 conv.GetNextIntArgLoc(4, 4);
76 conv.GetNextIntArgLoc(4, 4);
77 loc = conv.GetNextIntArgLoc(4, 4);
78 EXPECT_EQ(loc.kind, kArgLocationInt);
79 EXPECT_EQ(loc.offset, 6u);
80
81 // Add param that doesn't fit in the last reg.
82 loc = conv.GetNextIntArgLoc(16, 16);
83 EXPECT_EQ(loc.kind, kArgLocationStack);
84 EXPECT_EQ(loc.offset, 0u);
85
86 // Add param that can fit in the last reg, but still goes to stack.
87 loc = conv.GetNextIntArgLoc(4, 4);
88 EXPECT_EQ(loc.kind, kArgLocationStack);
89 EXPECT_EQ(loc.offset, 16u);
90 }
91
92 } // namespace
93
94 } // namespace berberis::arm64
95