1 | /* strcat with SSE2 |
2 | Copyright (C) 2011-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <isa-level.h> |
20 | |
21 | /* MINIMUM_X86_ISA_LEVEL <= 2 because there is no V2 implementation |
22 | so we need this to build for ISA V2 builds. */ |
23 | #if ISA_SHOULD_BUILD (2) |
24 | |
25 | |
26 | # include <sysdep.h> |
27 | |
28 | # ifndef STRCAT |
29 | # define STRCAT __strcat_sse2_unaligned |
30 | # endif |
31 | |
32 | # define USE_AS_STRCAT |
33 | |
34 | .text |
35 | ENTRY (STRCAT) |
36 | mov %rdi, %r9 |
37 | # ifdef USE_AS_STRNCAT |
38 | mov %rdx, %r8 |
39 | # endif |
40 | |
41 | /* Inline corresponding strlen file, temporary until new strcpy |
42 | implementation gets merged. */ |
43 | |
44 | xor %rax, %rax |
45 | mov %edi, %ecx |
46 | and $0x3f, %ecx |
47 | pxor %xmm0, %xmm0 |
48 | cmp $0x30, %ecx |
49 | ja L(next) |
50 | movdqu (%rdi), %xmm1 |
51 | pcmpeqb %xmm1, %xmm0 |
52 | pmovmskb %xmm0, %edx |
53 | test %edx, %edx |
54 | jnz L(exit_less16) |
55 | mov %rdi, %rax |
56 | and $-16, %rax |
57 | jmp L(align16_start) |
58 | L(next): |
59 | mov %rdi, %rax |
60 | and $-16, %rax |
61 | pcmpeqb (%rax), %xmm0 |
62 | mov $-1, %r10d |
63 | sub %rax, %rcx |
64 | shl %cl, %r10d |
65 | pmovmskb %xmm0, %edx |
66 | and %r10d, %edx |
67 | jnz L(exit) |
68 | |
69 | L(align16_start): |
70 | pxor %xmm0, %xmm0 |
71 | pxor %xmm1, %xmm1 |
72 | pxor %xmm2, %xmm2 |
73 | pxor %xmm3, %xmm3 |
74 | pcmpeqb 16(%rax), %xmm0 |
75 | pmovmskb %xmm0, %edx |
76 | test %edx, %edx |
77 | jnz L(exit16) |
78 | |
79 | pcmpeqb 32(%rax), %xmm1 |
80 | pmovmskb %xmm1, %edx |
81 | test %edx, %edx |
82 | jnz L(exit32) |
83 | |
84 | pcmpeqb 48(%rax), %xmm2 |
85 | pmovmskb %xmm2, %edx |
86 | test %edx, %edx |
87 | jnz L(exit48) |
88 | |
89 | pcmpeqb 64(%rax), %xmm3 |
90 | pmovmskb %xmm3, %edx |
91 | test %edx, %edx |
92 | jnz L(exit64) |
93 | |
94 | pcmpeqb 80(%rax), %xmm0 |
95 | add $64, %rax |
96 | pmovmskb %xmm0, %edx |
97 | test %edx, %edx |
98 | jnz L(exit16) |
99 | |
100 | pcmpeqb 32(%rax), %xmm1 |
101 | pmovmskb %xmm1, %edx |
102 | test %edx, %edx |
103 | jnz L(exit32) |
104 | |
105 | pcmpeqb 48(%rax), %xmm2 |
106 | pmovmskb %xmm2, %edx |
107 | test %edx, %edx |
108 | jnz L(exit48) |
109 | |
110 | pcmpeqb 64(%rax), %xmm3 |
111 | pmovmskb %xmm3, %edx |
112 | test %edx, %edx |
113 | jnz L(exit64) |
114 | |
115 | pcmpeqb 80(%rax), %xmm0 |
116 | add $64, %rax |
117 | pmovmskb %xmm0, %edx |
118 | test %edx, %edx |
119 | jnz L(exit16) |
120 | |
121 | pcmpeqb 32(%rax), %xmm1 |
122 | pmovmskb %xmm1, %edx |
123 | test %edx, %edx |
124 | jnz L(exit32) |
125 | |
126 | pcmpeqb 48(%rax), %xmm2 |
127 | pmovmskb %xmm2, %edx |
128 | test %edx, %edx |
129 | jnz L(exit48) |
130 | |
131 | pcmpeqb 64(%rax), %xmm3 |
132 | pmovmskb %xmm3, %edx |
133 | test %edx, %edx |
134 | jnz L(exit64) |
135 | |
136 | pcmpeqb 80(%rax), %xmm0 |
137 | add $64, %rax |
138 | pmovmskb %xmm0, %edx |
139 | test %edx, %edx |
140 | jnz L(exit16) |
141 | |
142 | pcmpeqb 32(%rax), %xmm1 |
143 | pmovmskb %xmm1, %edx |
144 | test %edx, %edx |
145 | jnz L(exit32) |
146 | |
147 | pcmpeqb 48(%rax), %xmm2 |
148 | pmovmskb %xmm2, %edx |
149 | test %edx, %edx |
150 | jnz L(exit48) |
151 | |
152 | pcmpeqb 64(%rax), %xmm3 |
153 | pmovmskb %xmm3, %edx |
154 | test %edx, %edx |
155 | jnz L(exit64) |
156 | |
157 | test $0x3f, %rax |
158 | jz L(align64_loop) |
159 | |
160 | pcmpeqb 80(%rax), %xmm0 |
161 | add $80, %rax |
162 | pmovmskb %xmm0, %edx |
163 | test %edx, %edx |
164 | jnz L(exit) |
165 | |
166 | test $0x3f, %rax |
167 | jz L(align64_loop) |
168 | |
169 | pcmpeqb 16(%rax), %xmm1 |
170 | add $16, %rax |
171 | pmovmskb %xmm1, %edx |
172 | test %edx, %edx |
173 | jnz L(exit) |
174 | |
175 | test $0x3f, %rax |
176 | jz L(align64_loop) |
177 | |
178 | pcmpeqb 16(%rax), %xmm2 |
179 | add $16, %rax |
180 | pmovmskb %xmm2, %edx |
181 | test %edx, %edx |
182 | jnz L(exit) |
183 | |
184 | test $0x3f, %rax |
185 | jz L(align64_loop) |
186 | |
187 | pcmpeqb 16(%rax), %xmm3 |
188 | add $16, %rax |
189 | pmovmskb %xmm3, %edx |
190 | test %edx, %edx |
191 | jnz L(exit) |
192 | |
193 | add $16, %rax |
194 | .p2align 4 |
195 | L(align64_loop): |
196 | movaps (%rax), %xmm4 |
197 | pminub 16(%rax), %xmm4 |
198 | movaps 32(%rax), %xmm5 |
199 | pminub 48(%rax), %xmm5 |
200 | add $64, %rax |
201 | pminub %xmm4, %xmm5 |
202 | pcmpeqb %xmm0, %xmm5 |
203 | pmovmskb %xmm5, %edx |
204 | test %edx, %edx |
205 | jz L(align64_loop) |
206 | |
207 | pcmpeqb -64(%rax), %xmm0 |
208 | sub $80, %rax |
209 | pmovmskb %xmm0, %edx |
210 | test %edx, %edx |
211 | jnz L(exit16) |
212 | |
213 | pcmpeqb 32(%rax), %xmm1 |
214 | pmovmskb %xmm1, %edx |
215 | test %edx, %edx |
216 | jnz L(exit32) |
217 | |
218 | pcmpeqb 48(%rax), %xmm2 |
219 | pmovmskb %xmm2, %edx |
220 | test %edx, %edx |
221 | jnz L(exit48) |
222 | |
223 | pcmpeqb 64(%rax), %xmm3 |
224 | pmovmskb %xmm3, %edx |
225 | sub %rdi, %rax |
226 | bsf %rdx, %rdx |
227 | add %rdx, %rax |
228 | add $64, %rax |
229 | jmp L(StartStrcpyPart) |
230 | |
231 | .p2align 4 |
232 | L(exit): |
233 | sub %rdi, %rax |
234 | L(exit_less16): |
235 | bsf %rdx, %rdx |
236 | add %rdx, %rax |
237 | jmp L(StartStrcpyPart) |
238 | |
239 | .p2align 4 |
240 | L(exit16): |
241 | sub %rdi, %rax |
242 | bsf %rdx, %rdx |
243 | add %rdx, %rax |
244 | add $16, %rax |
245 | jmp L(StartStrcpyPart) |
246 | |
247 | .p2align 4 |
248 | L(exit32): |
249 | sub %rdi, %rax |
250 | bsf %rdx, %rdx |
251 | add %rdx, %rax |
252 | add $32, %rax |
253 | jmp L(StartStrcpyPart) |
254 | |
255 | .p2align 4 |
256 | L(exit48): |
257 | sub %rdi, %rax |
258 | bsf %rdx, %rdx |
259 | add %rdx, %rax |
260 | add $48, %rax |
261 | jmp L(StartStrcpyPart) |
262 | |
263 | .p2align 4 |
264 | L(exit64): |
265 | sub %rdi, %rax |
266 | bsf %rdx, %rdx |
267 | add %rdx, %rax |
268 | add $64, %rax |
269 | |
270 | .p2align 4 |
271 | L(StartStrcpyPart): |
272 | lea (%r9, %rax), %rdi |
273 | mov %rsi, %rcx |
274 | mov %r9, %rax /* save result */ |
275 | |
276 | # ifdef USE_AS_STRNCAT |
277 | test %r8, %r8 |
278 | jz L(ExitZero) |
279 | # define USE_AS_STRNCPY |
280 | # endif |
281 | |
282 | # include "strcpy-sse2-unaligned.S" |
283 | #endif |
284 | |