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Commit | Line | Data |
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e0a65194 | 1 | #! /usr/bin/env perl |
082193ef | 2 | # Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved. |
e0a65194 | 3 | # |
0e9725bc | 4 | # Licensed under the Apache License 2.0 (the "License"). You may not use |
e0a65194 RS |
5 | # this file except in compliance with the License. You can obtain a copy |
6 | # in the file LICENSE in the source distribution or at | |
7 | # https://www.openssl.org/source/license.html | |
14e21f86 | 8 | |
4d1f3f7a DSH |
9 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; |
10 | push(@INC, "${dir}perlasm", "perlasm"); | |
14e21f86 AP |
11 | require "x86asm.pl"; |
12 | ||
0a4edb93 RL |
13 | $output = pop; |
14 | open OUT,">$output"; | |
15 | *STDOUT=*OUT; | |
16 | ||
e195c8a2 | 17 | &asm_init($ARGV[0]); |
14e21f86 | 18 | |
c5022659 AP |
19 | for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } |
20 | ||
14e21f86 AP |
21 | &function_begin("OPENSSL_ia32_cpuid"); |
22 | &xor ("edx","edx"); | |
23 | &pushf (); | |
24 | &pop ("eax"); | |
25 | &mov ("ecx","eax"); | |
26 | &xor ("eax",1<<21); | |
27 | &push ("eax"); | |
28 | &popf (); | |
29 | &pushf (); | |
30 | &pop ("eax"); | |
31 | &xor ("ecx","eax"); | |
162f677d | 32 | &xor ("eax","eax"); |
1aed5e1a AP |
33 | &mov ("esi",&wparam(0)); |
34 | &mov (&DWP(8,"esi"),"eax"); # clear extended feature flags | |
0f2ece87 AP |
35 | &bt ("ecx",21); |
36 | &jnc (&label("nocpuid")); | |
162f677d | 37 | &cpuid (); |
761393bb AP |
38 | &mov ("edi","eax"); # max value for standard query level |
39 | ||
162f677d AP |
40 | &xor ("eax","eax"); |
41 | &cmp ("ebx",0x756e6547); # "Genu" | |
42 | &setne (&LB("eax")); | |
43 | &mov ("ebp","eax"); | |
44 | &cmp ("edx",0x49656e69); # "ineI" | |
45 | &setne (&LB("eax")); | |
46 | &or ("ebp","eax"); | |
47 | &cmp ("ecx",0x6c65746e); # "ntel" | |
48 | &setne (&LB("eax")); | |
58672313 | 49 | &or ("ebp","eax"); # 0 indicates Intel CPU |
58672313 AP |
50 | &jz (&label("intel")); |
51 | ||
52 | &cmp ("ebx",0x68747541); # "Auth" | |
53 | &setne (&LB("eax")); | |
54 | &mov ("esi","eax"); | |
55 | &cmp ("edx",0x69746E65); # "enti" | |
56 | &setne (&LB("eax")); | |
57 | &or ("esi","eax"); | |
58 | &cmp ("ecx",0x444D4163); # "cAMD" | |
59 | &setne (&LB("eax")); | |
60 | &or ("esi","eax"); # 0 indicates AMD CPU | |
61 | &jnz (&label("intel")); | |
62 | ||
761393bb | 63 | # AMD specific |
58672313 AP |
64 | &mov ("eax",0x80000000); |
65 | &cpuid (); | |
b9064221 AP |
66 | &cmp ("eax",0x80000001); |
67 | &jb (&label("intel")); | |
68 | &mov ("esi","eax"); | |
69 | &mov ("eax",0x80000001); | |
70 | &cpuid (); | |
71 | &or ("ebp","ecx"); | |
72 | &and ("ebp",1<<11|1); # isolate XOP bit | |
73 | &cmp ("esi",0x80000008); | |
58672313 AP |
74 | &jb (&label("intel")); |
75 | ||
76 | &mov ("eax",0x80000008); | |
77 | &cpuid (); | |
78 | &movz ("esi",&LB("ecx")); # number of cores - 1 | |
79 | &inc ("esi"); # number of cores | |
80 | ||
761393bb | 81 | &mov ("eax",1); |
5702e965 | 82 | &xor ("ecx","ecx"); |
761393bb AP |
83 | &cpuid (); |
84 | &bt ("edx",28); | |
b9064221 | 85 | &jnc (&label("generic")); |
761393bb AP |
86 | &shr ("ebx",16); |
87 | &and ("ebx",0xff); | |
88 | &cmp ("ebx","esi"); | |
b9064221 | 89 | &ja (&label("generic")); |
761393bb | 90 | &and ("edx",0xefffffff); # clear hyper-threading bit |
b9064221 | 91 | &jmp (&label("generic")); |
609b0852 | 92 | |
58672313 | 93 | &set_label("intel"); |
761393bb | 94 | &cmp ("edi",4); |
1aed5e1a | 95 | &mov ("esi",-1); |
761393bb AP |
96 | &jb (&label("nocacheinfo")); |
97 | ||
98 | &mov ("eax",4); | |
99 | &mov ("ecx",0); # query L1D | |
100 | &cpuid (); | |
1aed5e1a AP |
101 | &mov ("esi","eax"); |
102 | &shr ("esi",14); | |
103 | &and ("esi",0xfff); # number of cores -1 per L1D | |
761393bb AP |
104 | |
105 | &set_label("nocacheinfo"); | |
14e21f86 | 106 | &mov ("eax",1); |
5702e965 | 107 | &xor ("ecx","ecx"); |
14e21f86 | 108 | &cpuid (); |
18f5603c | 109 | &and ("edx",0xbfefffff); # force reserved bits #20, #30 to 0 |
162f677d | 110 | &cmp ("ebp",0); |
4bb90087 AP |
111 | &jne (&label("notintel")); |
112 | &or ("edx",1<<30); # set reserved bit#30 on Intel CPUs | |
46f4e1be | 113 | &and (&HB("eax"),15); # family ID |
3df2eff4 | 114 | &cmp (&HB("eax"),15); # P4? |
4bb90087 AP |
115 | &jne (&label("notintel")); |
116 | &or ("edx",1<<20); # set reserved bit#20 to engage RC4_CHAR | |
117 | &set_label("notintel"); | |
3df2eff4 | 118 | &bt ("edx",28); # test hyper-threading bit |
b9064221 | 119 | &jnc (&label("generic")); |
761393bb | 120 | &and ("edx",0xefffffff); |
1aed5e1a | 121 | &cmp ("esi",0); |
b9064221 | 122 | &je (&label("generic")); |
761393bb AP |
123 | |
124 | &or ("edx",0x10000000); | |
162f677d | 125 | &shr ("ebx",16); |
761393bb | 126 | &cmp (&LB("ebx"),1); |
b9064221 | 127 | &ja (&label("generic")); |
b1e8b4e6 | 128 | &and ("edx",0xefffffff); # clear hyper-threading bit if not |
b9064221 AP |
129 | |
130 | &set_label("generic"); | |
131 | &and ("ebp",1<<11); # isolate AMD XOP flag | |
18f5603c | 132 | &and ("ecx",0xfffff7ff); # force 11th bit to 0 |
1aed5e1a | 133 | &mov ("esi","edx"); # %ebp:%esi is copy of %ecx:%edx |
b9064221 AP |
134 | &or ("ebp","ecx"); # merge AMD XOP flag |
135 | ||
1aed5e1a AP |
136 | &cmp ("edi",7); |
137 | &mov ("edi",&wparam(0)); | |
138 | &jb (&label("no_extended_info")); | |
139 | &mov ("eax",7); | |
140 | &xor ("ecx","ecx"); | |
141 | &cpuid (); | |
142 | &mov (&DWP(8,"edi"),"ebx"); # save extended feature flag | |
143 | &set_label("no_extended_info"); | |
144 | ||
145 | &bt ("ebp",27); # check OSXSAVE bit | |
e879dd43 | 146 | &jnc (&label("clear_avx")); |
b9064221 AP |
147 | &xor ("ecx","ecx"); |
148 | &data_byte(0x0f,0x01,0xd0); # xgetbv | |
149 | &and ("eax",6); | |
150 | &cmp ("eax",6); | |
151 | &je (&label("done")); | |
152 | &cmp ("eax",2); | |
153 | &je (&label("clear_avx")); | |
154 | &set_label("clear_xmm"); | |
18f5603c AP |
155 | &and ("ebp",0xfdfffffd); # clear AESNI and PCLMULQDQ bits |
156 | &and ("esi",0xfeffffff); # clear FXSR | |
b9064221 | 157 | &set_label("clear_avx"); |
18f5603c | 158 | &and ("ebp",0xefffe7ff); # clear AVX, FMA and AMD XOP bits |
c5cd28bd | 159 | &and (&DWP(8,"edi"),0xffffffdf); # clear AVX2 |
3df2eff4 | 160 | &set_label("done"); |
b9064221 AP |
161 | &mov ("eax","esi"); |
162 | &mov ("edx","ebp"); | |
0f2ece87 | 163 | &set_label("nocpuid"); |
14e21f86 AP |
164 | &function_end("OPENSSL_ia32_cpuid"); |
165 | ||
2b247cf8 | 166 | &external_label("OPENSSL_ia32cap_P"); |
14e21f86 | 167 | |
2b247cf8 | 168 | &function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); |
14e21f86 AP |
169 | &xor ("eax","eax"); |
170 | &xor ("edx","edx"); | |
2b247cf8 | 171 | &picmeup("ecx","OPENSSL_ia32cap_P"); |
14e21f86 AP |
172 | &bt (&DWP(0,"ecx"),4); |
173 | &jnc (&label("notsc")); | |
174 | &rdtsc (); | |
175 | &set_label("notsc"); | |
176 | &ret (); | |
177 | &function_end_B("OPENSSL_rdtsc"); | |
178 | ||
f642ebc1 | 179 | # This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host], |
c85c5c40 AP |
180 | # but it's safe to call it on any [supported] 32-bit platform... |
181 | # Just check for [non-]zero return value... | |
182 | &function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); | |
183 | &picmeup("ecx","OPENSSL_ia32cap_P"); | |
184 | &bt (&DWP(0,"ecx"),4); | |
185 | &jnc (&label("nohalt")); # no TSC | |
186 | ||
187 | &data_word(0x9058900e); # push %cs; pop %eax | |
188 | &and ("eax",3); | |
189 | &jnz (&label("nohalt")); # not enough privileges | |
190 | ||
191 | &pushf (); | |
f9c5e5d9 | 192 | &pop ("eax"); |
c85c5c40 AP |
193 | &bt ("eax",9); |
194 | &jnc (&label("nohalt")); # interrupts are disabled | |
195 | ||
196 | &rdtsc (); | |
197 | &push ("edx"); | |
198 | &push ("eax"); | |
199 | &halt (); | |
200 | &rdtsc (); | |
201 | ||
202 | &sub ("eax",&DWP(0,"esp")); | |
203 | &sbb ("edx",&DWP(4,"esp")); | |
204 | &add ("esp",8); | |
205 | &ret (); | |
206 | ||
207 | &set_label("nohalt"); | |
208 | &xor ("eax","eax"); | |
209 | &xor ("edx","edx"); | |
210 | &ret (); | |
211 | &function_end_B("OPENSSL_instrument_halt"); | |
212 | ||
f642ebc1 RS |
213 | # Essentially there is only one use for this function. Under DJGPP: |
214 | # | |
215 | # #include <go32.h> | |
216 | # ... | |
217 | # i=OPENSSL_far_spin(_dos_ds,0x46c); | |
218 | # ... | |
219 | # to obtain the number of spins till closest timer interrupt. | |
220 | ||
221 | &function_begin_B("OPENSSL_far_spin"); | |
222 | &pushf (); | |
223 | &pop ("eax"); | |
224 | &bt ("eax",9); | |
225 | &jnc (&label("nospin")); # interrupts are disabled | |
226 | ||
227 | &mov ("eax",&DWP(4,"esp")); | |
228 | &mov ("ecx",&DWP(8,"esp")); | |
229 | &data_word (0x90d88e1e); # push %ds, mov %eax,%ds | |
230 | &xor ("eax","eax"); | |
231 | &mov ("edx",&DWP(0,"ecx")); | |
232 | &jmp (&label("spin")); | |
233 | ||
234 | &align (16); | |
235 | &set_label("spin"); | |
236 | &inc ("eax"); | |
237 | &cmp ("edx",&DWP(0,"ecx")); | |
238 | &je (&label("spin")); | |
239 | ||
240 | &data_word (0x1f909090); # pop %ds | |
241 | &ret (); | |
242 | ||
243 | &set_label("nospin"); | |
244 | &xor ("eax","eax"); | |
245 | &xor ("edx","edx"); | |
246 | &ret (); | |
247 | &function_end_B("OPENSSL_far_spin"); | |
cee73df3 AP |
248 | |
249 | &function_begin_B("OPENSSL_wipe_cpu","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); | |
250 | &xor ("eax","eax"); | |
251 | &xor ("edx","edx"); | |
252 | &picmeup("ecx","OPENSSL_ia32cap_P"); | |
253 | &mov ("ecx",&DWP(0,"ecx")); | |
254 | &bt (&DWP(0,"ecx"),1); | |
255 | &jnc (&label("no_x87")); | |
c5022659 | 256 | if ($sse2) { |
b9064221 AP |
257 | &and ("ecx",1<<26|1<<24); # check SSE2 and FXSR bits |
258 | &cmp ("ecx",1<<26|1<<24); | |
259 | &jne (&label("no_sse2")); | |
c5022659 AP |
260 | &pxor ("xmm0","xmm0"); |
261 | &pxor ("xmm1","xmm1"); | |
262 | &pxor ("xmm2","xmm2"); | |
263 | &pxor ("xmm3","xmm3"); | |
264 | &pxor ("xmm4","xmm4"); | |
265 | &pxor ("xmm5","xmm5"); | |
266 | &pxor ("xmm6","xmm6"); | |
267 | &pxor ("xmm7","xmm7"); | |
268 | &set_label("no_sse2"); | |
269 | } | |
c49a0aa0 AP |
270 | # just a bunch of fldz to zap the fp/mm bank followed by finit... |
271 | &data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9,0x90e3db9b); | |
cee73df3 AP |
272 | &set_label("no_x87"); |
273 | &lea ("eax",&DWP(4,"esp")); | |
274 | &ret (); | |
275 | &function_end_B("OPENSSL_wipe_cpu"); | |
276 | ||
277 | &function_begin_B("OPENSSL_atomic_add"); | |
278 | &mov ("edx",&DWP(4,"esp")); # fetch the pointer, 1st arg | |
279 | &mov ("ecx",&DWP(8,"esp")); # fetch the increment, 2nd arg | |
280 | &push ("ebx"); | |
281 | &nop (); | |
282 | &mov ("eax",&DWP(0,"edx")); | |
283 | &set_label("spin"); | |
284 | &lea ("ebx",&DWP(0,"eax","ecx")); | |
285 | &nop (); | |
69687aa8 | 286 | &data_word(0x1ab10ff0); # lock; cmpxchg %ebx,(%edx) # %eax is involved and is always reloaded |
cee73df3 AP |
287 | &jne (&label("spin")); |
288 | &mov ("eax","ebx"); # OpenSSL expects the new value | |
289 | &pop ("ebx"); | |
290 | &ret (); | |
291 | &function_end_B("OPENSSL_atomic_add"); | |
292 | ||
b2dba9bf AP |
293 | &function_begin_B("OPENSSL_cleanse"); |
294 | &mov ("edx",&wparam(0)); | |
295 | &mov ("ecx",&wparam(1)); | |
296 | &xor ("eax","eax"); | |
297 | &cmp ("ecx",7); | |
298 | &jae (&label("lot")); | |
7676eebf AP |
299 | &cmp ("ecx",0); |
300 | &je (&label("ret")); | |
b2dba9bf AP |
301 | &set_label("little"); |
302 | &mov (&BP(0,"edx"),"al"); | |
303 | &sub ("ecx",1); | |
304 | &lea ("edx",&DWP(1,"edx")); | |
305 | &jnz (&label("little")); | |
7676eebf | 306 | &set_label("ret"); |
b2dba9bf AP |
307 | &ret (); |
308 | ||
309 | &set_label("lot",16); | |
310 | &test ("edx",3); | |
311 | &jz (&label("aligned")); | |
312 | &mov (&BP(0,"edx"),"al"); | |
313 | &lea ("ecx",&DWP(-1,"ecx")); | |
314 | &lea ("edx",&DWP(1,"edx")); | |
315 | &jmp (&label("lot")); | |
316 | &set_label("aligned"); | |
317 | &mov (&DWP(0,"edx"),"eax"); | |
318 | &lea ("ecx",&DWP(-4,"ecx")); | |
319 | &test ("ecx",-4); | |
320 | &lea ("edx",&DWP(4,"edx")); | |
321 | &jnz (&label("aligned")); | |
322 | &cmp ("ecx",0); | |
323 | &jne (&label("little")); | |
324 | &ret (); | |
325 | &function_end_B("OPENSSL_cleanse"); | |
326 | ||
e33826f0 AP |
327 | &function_begin_B("CRYPTO_memcmp"); |
328 | &push ("esi"); | |
329 | &push ("edi"); | |
330 | &mov ("esi",&wparam(0)); | |
331 | &mov ("edi",&wparam(1)); | |
332 | &mov ("ecx",&wparam(2)); | |
333 | &xor ("eax","eax"); | |
334 | &xor ("edx","edx"); | |
335 | &cmp ("ecx",0); | |
336 | &je (&label("no_data")); | |
337 | &set_label("loop"); | |
338 | &mov ("dl",&BP(0,"esi")); | |
339 | &lea ("esi",&DWP(1,"esi")); | |
340 | &xor ("dl",&BP(0,"edi")); | |
341 | &lea ("edi",&DWP(1,"edi")); | |
342 | &or ("al","dl"); | |
343 | &dec ("ecx"); | |
344 | &jnz (&label("loop")); | |
345 | &neg ("eax"); | |
346 | &shr ("eax",31); | |
347 | &set_label("no_data"); | |
348 | &pop ("edi"); | |
349 | &pop ("esi"); | |
350 | &ret (); | |
351 | &function_end_B("CRYPTO_memcmp"); | |
5fabb88a AP |
352 | { |
353 | my $lasttick = "esi"; | |
354 | my $lastdiff = "ebx"; | |
355 | my $out = "edi"; | |
356 | my $cnt = "ecx"; | |
357 | my $max = "ebp"; | |
358 | ||
359 | &function_begin("OPENSSL_instrument_bus"); | |
360 | &mov ("eax",0); | |
361 | if ($sse2) { | |
362 | &picmeup("edx","OPENSSL_ia32cap_P"); | |
363 | &bt (&DWP(0,"edx"),4); | |
364 | &jnc (&label("nogo")); # no TSC | |
365 | &bt (&DWP(0,"edx"),19); | |
366 | &jnc (&label("nogo")); # no CLFLUSH | |
367 | ||
368 | &mov ($out,&wparam(0)); # load arguments | |
369 | &mov ($cnt,&wparam(1)); | |
370 | ||
371 | # collect 1st tick | |
372 | &rdtsc (); | |
373 | &mov ($lasttick,"eax"); # lasttick = tick | |
374 | &mov ($lastdiff,0); # lastdiff = 0 | |
375 | &clflush(&DWP(0,$out)); | |
b9064221 | 376 | &data_byte(0xf0); # lock |
5fabb88a AP |
377 | &add (&DWP(0,$out),$lastdiff); |
378 | &jmp (&label("loop")); | |
379 | ||
380 | &set_label("loop",16); | |
381 | &rdtsc (); | |
382 | &mov ("edx","eax"); # put aside tick (yes, I neglect edx) | |
383 | &sub ("eax",$lasttick); # diff | |
384 | &mov ($lasttick,"edx"); # lasttick = tick | |
385 | &mov ($lastdiff,"eax"); # lastdiff = diff | |
386 | &clflush(&DWP(0,$out)); | |
b9064221 | 387 | &data_byte(0xf0); # lock |
5fabb88a AP |
388 | &add (&DWP(0,$out),"eax"); # accumulate diff |
389 | &lea ($out,&DWP(4,$out)); # ++$out | |
390 | &sub ($cnt,1); # --$cnt | |
391 | &jnz (&label("loop")); | |
392 | ||
393 | &mov ("eax",&wparam(1)); | |
394 | &set_label("nogo"); | |
395 | } | |
396 | &function_end("OPENSSL_instrument_bus"); | |
397 | ||
398 | &function_begin("OPENSSL_instrument_bus2"); | |
399 | &mov ("eax",0); | |
400 | if ($sse2) { | |
401 | &picmeup("edx","OPENSSL_ia32cap_P"); | |
402 | &bt (&DWP(0,"edx"),4); | |
403 | &jnc (&label("nogo")); # no TSC | |
404 | &bt (&DWP(0,"edx"),19); | |
405 | &jnc (&label("nogo")); # no CLFLUSH | |
406 | ||
407 | &mov ($out,&wparam(0)); # load arguments | |
408 | &mov ($cnt,&wparam(1)); | |
409 | &mov ($max,&wparam(2)); | |
410 | ||
411 | &rdtsc (); # collect 1st tick | |
412 | &mov ($lasttick,"eax"); # lasttick = tick | |
413 | &mov ($lastdiff,0); # lastdiff = 0 | |
414 | ||
415 | &clflush(&DWP(0,$out)); | |
b9064221 | 416 | &data_byte(0xf0); # lock |
5fabb88a AP |
417 | &add (&DWP(0,$out),$lastdiff); |
418 | ||
419 | &rdtsc (); # collect 1st diff | |
420 | &mov ("edx","eax"); # put aside tick (yes, I neglect edx) | |
421 | &sub ("eax",$lasttick); # diff | |
422 | &mov ($lasttick,"edx"); # lasttick = tick | |
423 | &mov ($lastdiff,"eax"); # lastdiff = diff | |
424 | &jmp (&label("loop2")); | |
425 | ||
426 | &set_label("loop2",16); | |
427 | &clflush(&DWP(0,$out)); | |
b9064221 | 428 | &data_byte(0xf0); # lock |
5fabb88a AP |
429 | &add (&DWP(0,$out),"eax"); # accumulate diff |
430 | ||
431 | &sub ($max,1); | |
432 | &jz (&label("done2")); | |
433 | ||
434 | &rdtsc (); | |
435 | &mov ("edx","eax"); # put aside tick (yes, I neglect edx) | |
436 | &sub ("eax",$lasttick); # diff | |
437 | &mov ($lasttick,"edx"); # lasttick = tick | |
438 | &cmp ("eax",$lastdiff); | |
439 | &mov ($lastdiff,"eax"); # lastdiff = diff | |
440 | &mov ("edx",0); | |
441 | &setne ("dl"); | |
442 | &sub ($cnt,"edx"); # conditional --$cnt | |
443 | &lea ($out,&DWP(0,$out,"edx",4)); # conditional ++$out | |
444 | &jnz (&label("loop2")); | |
445 | ||
446 | &set_label("done2"); | |
447 | &mov ("eax",&wparam(1)); | |
448 | &sub ("eax",$cnt); | |
449 | &set_label("nogo"); | |
450 | } | |
451 | &function_end("OPENSSL_instrument_bus2"); | |
452 | } | |
453 | ||
9c940446 AP |
454 | sub gen_random { |
455 | my $rdop = shift; | |
9c940446 AP |
456 | &function_begin_B("OPENSSL_ia32_${rdop}_bytes"); |
457 | &push ("edi"); | |
458 | &push ("ebx"); | |
459 | &xor ("eax","eax"); # return value | |
460 | &mov ("edi",&wparam(0)); | |
461 | &mov ("ebx",&wparam(1)); | |
462 | ||
463 | &cmp ("ebx",0); | |
464 | &je (&label("done")); | |
301799b8 | 465 | |
f4d45640 AP |
466 | &mov ("ecx",8); |
467 | &set_label("loop"); | |
9c940446 | 468 | &${rdop}("edx"); |
f4d45640 AP |
469 | &jc (&label("break")); |
470 | &loop (&label("loop")); | |
9c940446 AP |
471 | &jmp (&label("done")); |
472 | ||
473 | &set_label("break",16); | |
474 | &cmp ("ebx",4); | |
475 | &jb (&label("tail")); | |
476 | &mov (&DWP(0,"edi"),"edx"); | |
477 | &lea ("edi",&DWP(4,"edi")); | |
478 | &add ("eax",4); | |
479 | &sub ("ebx",4); | |
480 | &jz (&label("done")); | |
481 | &mov ("ecx",8); | |
482 | &jmp (&label("loop")); | |
483 | ||
484 | &set_label("tail",16); | |
485 | &mov (&BP(0,"edi"),"dl"); | |
486 | &lea ("edi",&DWP(1,"edi")); | |
487 | &inc ("eax"); | |
488 | &shr ("edx",8); | |
489 | &dec ("ebx"); | |
490 | &jnz (&label("tail")); | |
491 | ||
492 | &set_label("done"); | |
082193ef | 493 | &xor ("edx","edx"); # Clear random value from registers |
9c940446 AP |
494 | &pop ("ebx"); |
495 | &pop ("edi"); | |
f4d45640 | 496 | &ret (); |
9c940446 AP |
497 | &function_end_B("OPENSSL_ia32_${rdop}_bytes"); |
498 | } | |
499 | &gen_random("rdrand"); | |
500 | &gen_random("rdseed"); | |
f4d45640 | 501 | |
2b247cf8 | 502 | &initseg("OPENSSL_cpuid_setup"); |
14e21f86 | 503 | |
6206682a AP |
504 | &hidden("OPENSSL_cpuid_setup"); |
505 | &hidden("OPENSSL_ia32cap_P"); | |
506 | ||
14e21f86 | 507 | &asm_finish(); |
0a4edb93 RL |
508 | |
509 | close STDOUT; |