1// Copyright 2016 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package ssa
6
7import "testing"
8
9// We generate memmove for copy(x[1:], x[:]), however we may change it to OpMove,
10// because size is known. Check that OpMove is alias-safe, or we did call memmove.
11func TestMove(t *testing.T) {
12	x := [...]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40}
13	copy(x[1:], x[:])
14	for i := 1; i < len(x); i++ {
15		if int(x[i]) != i {
16			t.Errorf("Memmove got converted to OpMove in alias-unsafe way. Got %d instead of %d in position %d", int(x[i]), i, i+1)
17		}
18	}
19}
20
21func TestMoveSmall(t *testing.T) {
22	x := [...]byte{1, 2, 3, 4, 5, 6, 7}
23	copy(x[1:], x[:])
24	for i := 1; i < len(x); i++ {
25		if int(x[i]) != i {
26			t.Errorf("Memmove got converted to OpMove in alias-unsafe way. Got %d instead of %d in position %d", int(x[i]), i, i+1)
27		}
28	}
29}
30
31func TestSubFlags(t *testing.T) {
32	if !subFlags32(0, 1).lt() {
33		t.Errorf("subFlags32(0,1).lt() returned false")
34	}
35	if !subFlags32(0, 1).ult() {
36		t.Errorf("subFlags32(0,1).ult() returned false")
37	}
38}
39
40func TestIsPPC64WordRotateMask(t *testing.T) {
41	tests := []struct {
42		input    int64
43		expected bool
44	}{
45		{0x00000001, true},
46		{0x80000001, true},
47		{0x80010001, false},
48		{0xFFFFFFFA, false},
49		{0xF0F0F0F0, false},
50		{0xFFFFFFFD, true},
51		{0x80000000, true},
52		{0x00000000, false},
53		{0xFFFFFFFF, true},
54		{0x0000FFFF, true},
55		{0xFF0000FF, true},
56		{0x00FFFF00, true},
57	}
58
59	for _, v := range tests {
60		if v.expected != isPPC64WordRotateMask(v.input) {
61			t.Errorf("isPPC64WordRotateMask(0x%x) failed", v.input)
62		}
63	}
64}
65
66func TestEncodeDecodePPC64WordRotateMask(t *testing.T) {
67	tests := []struct {
68		rotate int64
69		mask   uint64
70		nbits,
71		mb,
72		me,
73		encoded int64
74	}{
75		{1, 0x00000001, 32, 31, 31, 0x20011f20},
76		{2, 0x80000001, 32, 31, 0, 0x20021f01},
77		{3, 0xFFFFFFFD, 32, 31, 29, 0x20031f1e},
78		{4, 0x80000000, 32, 0, 0, 0x20040001},
79		{5, 0xFFFFFFFF, 32, 0, 31, 0x20050020},
80		{6, 0x0000FFFF, 32, 16, 31, 0x20061020},
81		{7, 0xFF0000FF, 32, 24, 7, 0x20071808},
82		{8, 0x00FFFF00, 32, 8, 23, 0x20080818},
83
84		{9, 0x0000000000FFFF00, 64, 40, 55, 0x40092838},
85		{10, 0xFFFF000000000000, 64, 0, 15, 0x400A0010},
86		{10, 0xFFFF000000000001, 64, 63, 15, 0x400A3f10},
87	}
88
89	for i, v := range tests {
90		result := encodePPC64RotateMask(v.rotate, int64(v.mask), v.nbits)
91		if result != v.encoded {
92			t.Errorf("encodePPC64RotateMask(%d,0x%x,%d) = 0x%x, expected 0x%x", v.rotate, v.mask, v.nbits, result, v.encoded)
93		}
94		rotate, mb, me, mask := DecodePPC64RotateMask(result)
95		if rotate != v.rotate || mb != v.mb || me != v.me || mask != v.mask {
96			t.Errorf("DecodePPC64Failure(Test %d) got (%d, %d, %d, %x) expected (%d, %d, %d, %x)", i, rotate, mb, me, mask, v.rotate, v.mb, v.me, v.mask)
97		}
98	}
99}
100
101func TestMergePPC64ClrlsldiSrw(t *testing.T) {
102	tests := []struct {
103		clrlsldi int32
104		srw      int64
105		valid    bool
106		rotate   int64
107		mask     uint64
108	}{
109		// ((x>>4)&0xFF)<<4
110		{newPPC64ShiftAuxInt(4, 56, 63, 64), 4, true, 0, 0xFF0},
111		// ((x>>4)&0xFFFF)<<4
112		{newPPC64ShiftAuxInt(4, 48, 63, 64), 4, true, 0, 0xFFFF0},
113		// ((x>>4)&0xFFFF)<<17
114		{newPPC64ShiftAuxInt(17, 48, 63, 64), 4, false, 0, 0},
115		// ((x>>4)&0xFFFF)<<16
116		{newPPC64ShiftAuxInt(16, 48, 63, 64), 4, true, 12, 0xFFFF0000},
117		// ((x>>32)&0xFFFF)<<17
118		{newPPC64ShiftAuxInt(17, 48, 63, 64), 32, false, 0, 0},
119	}
120	for i, v := range tests {
121		result := mergePPC64ClrlsldiSrw(int64(v.clrlsldi), v.srw)
122		if v.valid && result == 0 {
123			t.Errorf("mergePPC64ClrlsldiSrw(Test %d) did not merge", i)
124		} else if !v.valid && result != 0 {
125			t.Errorf("mergePPC64ClrlsldiSrw(Test %d) should return 0", i)
126		} else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m {
127			t.Errorf("mergePPC64ClrlsldiSrw(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask)
128		}
129	}
130}
131
132func TestMergePPC64ClrlsldiRlwinm(t *testing.T) {
133	tests := []struct {
134		clrlsldi int32
135		rlwinm   int64
136		valid    bool
137		rotate   int64
138		mask     uint64
139	}{
140		// ((x<<4)&0xFF00)<<4
141		{newPPC64ShiftAuxInt(4, 56, 63, 64), encodePPC64RotateMask(4, 0xFF00, 32), false, 0, 0},
142		// ((x>>4)&0xFF)<<4
143		{newPPC64ShiftAuxInt(4, 56, 63, 64), encodePPC64RotateMask(28, 0x0FFFFFFF, 32), true, 0, 0xFF0},
144		// ((x>>4)&0xFFFF)<<4
145		{newPPC64ShiftAuxInt(4, 48, 63, 64), encodePPC64RotateMask(28, 0xFFFF, 32), true, 0, 0xFFFF0},
146		// ((x>>4)&0xFFFF)<<17
147		{newPPC64ShiftAuxInt(17, 48, 63, 64), encodePPC64RotateMask(28, 0xFFFF, 32), false, 0, 0},
148		// ((x>>4)&0xFFFF)<<16
149		{newPPC64ShiftAuxInt(16, 48, 63, 64), encodePPC64RotateMask(28, 0xFFFF, 32), true, 12, 0xFFFF0000},
150		// ((x>>4)&0xF000FFFF)<<16
151		{newPPC64ShiftAuxInt(16, 48, 63, 64), encodePPC64RotateMask(28, 0xF000FFFF, 32), true, 12, 0xFFFF0000},
152	}
153	for i, v := range tests {
154		result := mergePPC64ClrlsldiRlwinm(v.clrlsldi, v.rlwinm)
155		if v.valid && result == 0 {
156			t.Errorf("mergePPC64ClrlsldiRlwinm(Test %d) did not merge", i)
157		} else if !v.valid && result != 0 {
158			t.Errorf("mergePPC64ClrlsldiRlwinm(Test %d) should return 0", i)
159		} else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m {
160			t.Errorf("mergePPC64ClrlsldiRlwinm(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask)
161		}
162	}
163}
164
165func TestMergePPC64SldiSrw(t *testing.T) {
166	tests := []struct {
167		sld    int64
168		srw    int64
169		valid  bool
170		rotate int64
171		mask   uint64
172	}{
173		{4, 4, true, 0, 0xFFFFFFF0},
174		{4, 8, true, 28, 0x0FFFFFF0},
175		{0, 0, true, 0, 0xFFFFFFFF},
176		{8, 4, false, 0, 0},
177		{0, 32, false, 0, 0},
178		{0, 31, true, 1, 0x1},
179		{31, 31, true, 0, 0x80000000},
180		{32, 32, false, 0, 0},
181	}
182	for i, v := range tests {
183		result := mergePPC64SldiSrw(v.sld, v.srw)
184		if v.valid && result == 0 {
185			t.Errorf("mergePPC64SldiSrw(Test %d) did not merge", i)
186		} else if !v.valid && result != 0 {
187			t.Errorf("mergePPC64SldiSrw(Test %d) should return 0", i)
188		} else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m {
189			t.Errorf("mergePPC64SldiSrw(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask)
190		}
191	}
192}
193
194func TestMergePPC64AndSrwi(t *testing.T) {
195	tests := []struct {
196		and    int64
197		srw    int64
198		valid  bool
199		rotate int64
200		mask   uint64
201	}{
202		{0x000000FF, 8, true, 24, 0xFF},
203		{0xF00000FF, 8, true, 24, 0xFF},
204		{0x0F0000FF, 4, false, 0, 0},
205		{0x00000000, 4, false, 0, 0},
206		{0xF0000000, 4, false, 0, 0},
207		{0xF0000000, 32, false, 0, 0},
208		{0xFFFFFFFF, 0, true, 0, 0xFFFFFFFF},
209	}
210	for i, v := range tests {
211		result := mergePPC64AndSrwi(v.and, v.srw)
212		if v.valid && result == 0 {
213			t.Errorf("mergePPC64AndSrwi(Test %d) did not merge", i)
214		} else if !v.valid && result != 0 {
215			t.Errorf("mergePPC64AndSrwi(Test %d) should return 0", i)
216		} else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m {
217			t.Errorf("mergePPC64AndSrwi(Test %d) got (%d,0x%x) expected (%d,0x%x)", i, r, m, v.rotate, v.mask)
218		}
219	}
220}
221