1 | /* Compare two memory blocks for differences in the first COUNT bytes. |
2 | For SPARC v9. |
3 | Copyright (C) 1998-2024 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <https://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <sysdep.h> |
21 | #include <asm/asi.h> |
22 | #ifndef XCC |
23 | #define XCC xcc |
24 | #define USE_BPR |
25 | .register %g2, #scratch |
26 | .register %g3, #scratch |
27 | #endif |
28 | |
29 | .text |
30 | .align 32 |
31 | ENTRY(memcmp) |
32 | #ifdef USE_BPR |
33 | brz,pn %o2, 3f /* CTI+IEU1 Group */ |
34 | #else |
35 | tst %o2 /* IEU1 Group */ |
36 | be,pn %XCC, 3f /* CTI */ |
37 | #endif |
38 | andcc %o0, 7, %g0 /* IEU1 Group */ |
39 | bne,pn %icc, 8f /* CTI */ |
40 | 1: andcc %o1, 7, %g1 /* IEU1 Group */ |
41 | |
42 | bne,pn %icc, 10f /* CTI */ |
43 | mov 64, %g3 /* IEU0 */ |
44 | ldx [%o0], %g1 /* Load Group */ |
45 | sub %o1, %o0, %o1 /* IEU0 */ |
46 | |
47 | ldx [%o0 + %o1], %g2 /* Load Group */ |
48 | add %o0, 8, %o0 /* IEU0 */ |
49 | 2: mov %g1, %o3 /* IEU0 Group */ |
50 | subcc %o2, 8, %o2 /* IEU1 */ |
51 | |
52 | bcs,pn %XCC, 5f /* CTI */ |
53 | ldxa [%o0] ASI_PNF, %g1 /* Load Group */ |
54 | mov %g2, %o4 /* IEU0 */ |
55 | ldxa [%o0 + %o1] ASI_PNF, %g2 /* Load Group */ |
56 | |
57 | cmp %o3, %o4 /* IEU1 */ |
58 | be,pt %xcc, 2b /* CTI */ |
59 | add %o0, 8, %o0 /* IEU0 */ |
60 | 7: mov -1, %o0 /* IEU1 */ |
61 | |
62 | retl /* CTI+IEU1 Group */ |
63 | movgu %xcc, 1, %o0 /* Single Group */ |
64 | 3: retl /* CTI+IEU1 Group */ |
65 | clr %o0 /* IEU0 */ |
66 | |
67 | .align 16 |
68 | 5: mov %g2, %o4 /* IEU0 */ |
69 | 6: cmp %o2, -8 /* IEU1 */ |
70 | be,pn %XCC, 3b /* CTI */ |
71 | sub %g0, %o2, %o2 /* IEU0 Group */ |
72 | |
73 | sllx %o2, 3, %o2 /* IEU0 Group */ |
74 | srlx %o3, %o2, %o3 /* IEU0 Group */ |
75 | srlx %o4, %o2, %o4 /* IEU0 Group */ |
76 | clr %o0 /* IEU1 */ |
77 | |
78 | cmp %o3, %o4 /* IEU1 Group */ |
79 | movgu %xcc, 1, %o0 /* Single Group */ |
80 | retl /* CTI+IEU1 Group */ |
81 | movlu %xcc, -1, %o0 /* Single Group */ |
82 | |
83 | 8: ldub [%o0], %o3 /* Load */ |
84 | add %o0, 1, %o0 /* IEU0 */ |
85 | ldub [%o1], %o4 /* Load Group */ |
86 | add %o1, 1, %o1 /* IEU0 */ |
87 | |
88 | 9: cmp %o3, %o4 /* IEU1 Group */ |
89 | bne,pn %xcc, 12f /* CTI */ |
90 | subcc %o2, 1, %o2 /* IEU1 Group */ |
91 | be,pn %XCC, 3b /* CTI */ |
92 | |
93 | lduba [%o0] ASI_PNF, %o3 /* Load */ |
94 | andcc %o0, 7, %g0 /* IEU1 Group */ |
95 | be,pn %icc, 1b /* CTI */ |
96 | lduba [%o1] ASI_PNF, %o4 /* Load */ |
97 | |
98 | add %o0, 1, %o0 /* IEU0 Group */ |
99 | ba,pt %xcc, 9b /* CTI */ |
100 | add %o1, 1, %o1 /* IEU1 */ |
101 | |
102 | .align 16 |
103 | 12: mov -1, %o0 /* IEU0 Group */ |
104 | cmp %o3, %o4 /* IEU1 */ |
105 | retl /* CTI+IEU1 Group */ |
106 | movgu %xcc, 1, %o0 /* Single Group */ |
107 | |
108 | .align 16 |
109 | nop /* Stub */ |
110 | 10: sllx %g1, 3, %g2 /* IEU0 Group */ |
111 | sub %o1, %g1, %o1 /* IEU1 */ |
112 | sub %g3, %g2, %g3 /* IEU0 Group */ |
113 | |
114 | ldxa [%o0] ASI_PNF, %g5 /* Load */ |
115 | sub %o1, %o0, %o1 /* IEU1 */ |
116 | ldxa [%o0 + %o1] ASI_PNF, %g4 /* Load Group */ |
117 | add %o0, 8, %o0 /* IEU0 */ |
118 | |
119 | 11: sllx %g4, %g2, %o4 /* IEU0 Group */ |
120 | ldxa [%o0 + %o1] ASI_PNF, %g4 /* Load */ |
121 | srlx %g4, %g3, %o5 /* IEU0 Group */ |
122 | mov %g5, %o3 /* IEU1 */ |
123 | |
124 | ldxa [%o0] ASI_PNF, %g5 /* Load */ |
125 | subcc %o2, 8, %o2 /* IEU1 Group */ |
126 | bcs,pn %XCC, 6b /* CTI */ |
127 | or %o4, %o5, %o4 /* IEU0 */ |
128 | |
129 | cmp %o3, %o4 /* IEU1 Group */ |
130 | be,pt %xcc, 11b /* CTI */ |
131 | add %o0, 8, %o0 /* IEU0 */ |
132 | mov -1, %o0 /* IEU0 */ |
133 | |
134 | retl /* CTI+IEU1 Group */ |
135 | movgu %xcc, 1, %o0 /* Single Group */ |
136 | END(memcmp) |
137 | |
138 | #undef bcmp |
139 | weak_alias (memcmp, bcmp) |
140 | #undef __memcmpeq |
141 | strong_alias (memcmp, __memcmpeq) |
142 | libc_hidden_builtin_def (memcmp) |
143 | libc_hidden_def (__memcmpeq) |
144 | |