Import OpenSSL-1.0.1d.
[dragonfly.git] / crypto / openssl / crypto / x86cpuid.pl
1 #!/usr/bin/env perl
2
3 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
4 push(@INC, "${dir}perlasm", "perlasm");
5 require "x86asm.pl";
6
7 &asm_init($ARGV[0],"x86cpuid");
8
9 for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
10
11 &function_begin("OPENSSL_ia32_cpuid");
12         &xor    ("edx","edx");
13         &pushf  ();
14         &pop    ("eax");
15         &mov    ("ecx","eax");
16         &xor    ("eax",1<<21);
17         &push   ("eax");
18         &popf   ();
19         &pushf  ();
20         &pop    ("eax");
21         &xor    ("ecx","eax");
22         &xor    ("eax","eax");
23         &bt     ("ecx",21);
24         &jnc    (&label("nocpuid"));
25         &cpuid  ();
26         &mov    ("edi","eax");          # max value for standard query level
27
28         &xor    ("eax","eax");
29         &cmp    ("ebx",0x756e6547);     # "Genu"
30         &setne  (&LB("eax"));
31         &mov    ("ebp","eax");
32         &cmp    ("edx",0x49656e69);     # "ineI"
33         &setne  (&LB("eax"));
34         &or     ("ebp","eax");
35         &cmp    ("ecx",0x6c65746e);     # "ntel"
36         &setne  (&LB("eax"));
37         &or     ("ebp","eax");          # 0 indicates Intel CPU
38         &jz     (&label("intel"));
39
40         &cmp    ("ebx",0x68747541);     # "Auth"
41         &setne  (&LB("eax"));
42         &mov    ("esi","eax");
43         &cmp    ("edx",0x69746E65);     # "enti"
44         &setne  (&LB("eax"));
45         &or     ("esi","eax");
46         &cmp    ("ecx",0x444D4163);     # "cAMD"
47         &setne  (&LB("eax"));
48         &or     ("esi","eax");          # 0 indicates AMD CPU
49         &jnz    (&label("intel"));
50
51         # AMD specific
52         &mov    ("eax",0x80000000);
53         &cpuid  ();
54         &cmp    ("eax",0x80000001);
55         &jb     (&label("intel"));
56         &mov    ("esi","eax");
57         &mov    ("eax",0x80000001);
58         &cpuid  ();
59         &or     ("ebp","ecx");
60         &and    ("ebp",1<<11|1);        # isolate XOP bit
61         &cmp    ("esi",0x80000008);
62         &jb     (&label("intel"));
63
64         &mov    ("eax",0x80000008);
65         &cpuid  ();
66         &movz   ("esi",&LB("ecx"));     # number of cores - 1
67         &inc    ("esi");                # number of cores
68
69         &mov    ("eax",1);
70         &cpuid  ();
71         &bt     ("edx",28);
72         &jnc    (&label("generic"));
73         &shr    ("ebx",16);
74         &and    ("ebx",0xff);
75         &cmp    ("ebx","esi");
76         &ja     (&label("generic"));
77         &and    ("edx",0xefffffff);     # clear hyper-threading bit
78         &jmp    (&label("generic"));
79         
80 &set_label("intel");
81         &cmp    ("edi",4);
82         &mov    ("edi",-1);
83         &jb     (&label("nocacheinfo"));
84
85         &mov    ("eax",4);
86         &mov    ("ecx",0);              # query L1D
87         &cpuid  ();
88         &mov    ("edi","eax");
89         &shr    ("edi",14);
90         &and    ("edi",0xfff);          # number of cores -1 per L1D
91
92 &set_label("nocacheinfo");
93         &mov    ("eax",1);
94         &cpuid  ();
95         &and    ("edx",0xbfefffff);     # force reserved bits #20, #30 to 0
96         &cmp    ("ebp",0);
97         &jne    (&label("notintel"));
98         &or     ("edx",1<<30);          # set reserved bit#30 on Intel CPUs
99         &and    (&HB("eax"),15);        # familiy ID
100         &cmp    (&HB("eax"),15);        # P4?
101         &jne    (&label("notintel"));
102         &or     ("edx",1<<20);          # set reserved bit#20 to engage RC4_CHAR
103 &set_label("notintel");
104         &bt     ("edx",28);             # test hyper-threading bit
105         &jnc    (&label("generic"));
106         &and    ("edx",0xefffffff);
107         &cmp    ("edi",0);
108         &je     (&label("generic"));
109
110         &or     ("edx",0x10000000);
111         &shr    ("ebx",16);
112         &cmp    (&LB("ebx"),1);
113         &ja     (&label("generic"));
114         &and    ("edx",0xefffffff);     # clear hyper-threading bit if not
115
116 &set_label("generic");
117         &and    ("ebp",1<<11);          # isolate AMD XOP flag
118         &and    ("ecx",0xfffff7ff);     # force 11th bit to 0
119         &mov    ("esi","edx");
120         &or     ("ebp","ecx");          # merge AMD XOP flag
121
122         &bt     ("ecx",27);             # check OSXSAVE bit
123         &jnc    (&label("clear_avx"));
124         &xor    ("ecx","ecx");
125         &data_byte(0x0f,0x01,0xd0);     # xgetbv
126         &and    ("eax",6);
127         &cmp    ("eax",6);
128         &je     (&label("done"));
129         &cmp    ("eax",2);
130         &je     (&label("clear_avx"));
131 &set_label("clear_xmm");
132         &and    ("ebp",0xfdfffffd);     # clear AESNI and PCLMULQDQ bits
133         &and    ("esi",0xfeffffff);     # clear FXSR
134 &set_label("clear_avx");
135         &and    ("ebp",0xefffe7ff);     # clear AVX, FMA and AMD XOP bits
136 &set_label("done");
137         &mov    ("eax","esi");
138         &mov    ("edx","ebp");
139 &set_label("nocpuid");
140 &function_end("OPENSSL_ia32_cpuid");
141
142 &external_label("OPENSSL_ia32cap_P");
143
144 &function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
145         &xor    ("eax","eax");
146         &xor    ("edx","edx");
147         &picmeup("ecx","OPENSSL_ia32cap_P");
148         &bt     (&DWP(0,"ecx"),4);
149         &jnc    (&label("notsc"));
150         &rdtsc  ();
151 &set_label("notsc");
152         &ret    ();
153 &function_end_B("OPENSSL_rdtsc");
154
155 # This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host],
156 # but it's safe to call it on any [supported] 32-bit platform...
157 # Just check for [non-]zero return value...
158 &function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
159         &picmeup("ecx","OPENSSL_ia32cap_P");
160         &bt     (&DWP(0,"ecx"),4);
161         &jnc    (&label("nohalt"));     # no TSC
162
163         &data_word(0x9058900e);         # push %cs; pop %eax
164         &and    ("eax",3);
165         &jnz    (&label("nohalt"));     # not enough privileges
166
167         &pushf  ();
168         &pop    ("eax");
169         &bt     ("eax",9);
170         &jnc    (&label("nohalt"));     # interrupts are disabled
171
172         &rdtsc  ();
173         &push   ("edx");
174         &push   ("eax");
175         &halt   ();
176         &rdtsc  ();
177
178         &sub    ("eax",&DWP(0,"esp"));
179         &sbb    ("edx",&DWP(4,"esp"));
180         &add    ("esp",8);
181         &ret    ();
182
183 &set_label("nohalt");
184         &xor    ("eax","eax");
185         &xor    ("edx","edx");
186         &ret    ();
187 &function_end_B("OPENSSL_instrument_halt");
188
189 # Essentially there is only one use for this function. Under DJGPP:
190 #
191 #       #include <go32.h>
192 #       ...
193 #       i=OPENSSL_far_spin(_dos_ds,0x46c);
194 #       ...
195 # to obtain the number of spins till closest timer interrupt.
196
197 &function_begin_B("OPENSSL_far_spin");
198         &pushf  ();
199         &pop    ("eax")
200         &bt     ("eax",9);
201         &jnc    (&label("nospin"));     # interrupts are disabled
202
203         &mov    ("eax",&DWP(4,"esp"));
204         &mov    ("ecx",&DWP(8,"esp"));
205         &data_word (0x90d88e1e);        # push %ds, mov %eax,%ds
206         &xor    ("eax","eax");
207         &mov    ("edx",&DWP(0,"ecx"));
208         &jmp    (&label("spin"));
209
210         &align  (16);
211 &set_label("spin");
212         &inc    ("eax");
213         &cmp    ("edx",&DWP(0,"ecx"));
214         &je     (&label("spin"));
215
216         &data_word (0x1f909090);        # pop   %ds
217         &ret    ();
218
219 &set_label("nospin");
220         &xor    ("eax","eax");
221         &xor    ("edx","edx");
222         &ret    ();
223 &function_end_B("OPENSSL_far_spin");
224
225 &function_begin_B("OPENSSL_wipe_cpu","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
226         &xor    ("eax","eax");
227         &xor    ("edx","edx");
228         &picmeup("ecx","OPENSSL_ia32cap_P");
229         &mov    ("ecx",&DWP(0,"ecx"));
230         &bt     (&DWP(0,"ecx"),1);
231         &jnc    (&label("no_x87"));
232         if ($sse2) {
233                 &and    ("ecx",1<<26|1<<24);    # check SSE2 and FXSR bits
234                 &cmp    ("ecx",1<<26|1<<24);
235                 &jne    (&label("no_sse2"));
236                 &pxor   ("xmm0","xmm0");
237                 &pxor   ("xmm1","xmm1");
238                 &pxor   ("xmm2","xmm2");
239                 &pxor   ("xmm3","xmm3");
240                 &pxor   ("xmm4","xmm4");
241                 &pxor   ("xmm5","xmm5");
242                 &pxor   ("xmm6","xmm6");
243                 &pxor   ("xmm7","xmm7");
244         &set_label("no_sse2");
245         }
246         # just a bunch of fldz to zap the fp/mm bank followed by finit...
247         &data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9,0x90e3db9b);
248 &set_label("no_x87");
249         &lea    ("eax",&DWP(4,"esp"));
250         &ret    ();
251 &function_end_B("OPENSSL_wipe_cpu");
252
253 &function_begin_B("OPENSSL_atomic_add");
254         &mov    ("edx",&DWP(4,"esp"));  # fetch the pointer, 1st arg
255         &mov    ("ecx",&DWP(8,"esp"));  # fetch the increment, 2nd arg
256         &push   ("ebx");
257         &nop    ();
258         &mov    ("eax",&DWP(0,"edx"));
259 &set_label("spin");
260         &lea    ("ebx",&DWP(0,"eax","ecx"));
261         &nop    ();
262         &data_word(0x1ab10ff0); # lock; cmpxchg %ebx,(%edx)     # %eax is envolved and is always reloaded
263         &jne    (&label("spin"));
264         &mov    ("eax","ebx");  # OpenSSL expects the new value
265         &pop    ("ebx");
266         &ret    ();
267 &function_end_B("OPENSSL_atomic_add");
268
269 # This function can become handy under Win32 in situations when
270 # we don't know which calling convention, __stdcall or __cdecl(*),
271 # indirect callee is using. In C it can be deployed as
272 #
273 #ifdef OPENSSL_CPUID_OBJ
274 #       type OPENSSL_indirect_call(void *f,...);
275 #       ...
276 #       OPENSSL_indirect_call(func,[up to $max arguments]);
277 #endif
278 #
279 # (*)   it's designed to work even for __fastcall if number of
280 #       arguments is 1 or 2!
281 &function_begin_B("OPENSSL_indirect_call");
282         {
283         my ($max,$i)=(7,);      # $max has to be chosen as 4*n-1
284                                 # in order to preserve eventual
285                                 # stack alignment
286         &push   ("ebp");
287         &mov    ("ebp","esp");
288         &sub    ("esp",$max*4);
289         &mov    ("ecx",&DWP(12,"ebp"));
290         &mov    (&DWP(0,"esp"),"ecx");
291         &mov    ("edx",&DWP(16,"ebp"));
292         &mov    (&DWP(4,"esp"),"edx");
293         for($i=2;$i<$max;$i++)
294                 {
295                 # Some copies will be redundant/bogus...
296                 &mov    ("eax",&DWP(12+$i*4,"ebp"));
297                 &mov    (&DWP(0+$i*4,"esp"),"eax");
298                 }
299         &call_ptr       (&DWP(8,"ebp"));# make the call...
300         &mov    ("esp","ebp");  # ... and just restore the stack pointer
301                                 # without paying attention to what we called,
302                                 # (__cdecl *func) or (__stdcall *one).
303         &pop    ("ebp");
304         &ret    ();
305         }
306 &function_end_B("OPENSSL_indirect_call");
307
308 &function_begin_B("OPENSSL_cleanse");
309         &mov    ("edx",&wparam(0));
310         &mov    ("ecx",&wparam(1));
311         &xor    ("eax","eax");
312         &cmp    ("ecx",7);
313         &jae    (&label("lot"));
314         &cmp    ("ecx",0);
315         &je     (&label("ret"));
316 &set_label("little");
317         &mov    (&BP(0,"edx"),"al");
318         &sub    ("ecx",1);
319         &lea    ("edx",&DWP(1,"edx"));
320         &jnz    (&label("little"));
321 &set_label("ret");
322         &ret    ();
323
324 &set_label("lot",16);
325         &test   ("edx",3);
326         &jz     (&label("aligned"));
327         &mov    (&BP(0,"edx"),"al");
328         &lea    ("ecx",&DWP(-1,"ecx"));
329         &lea    ("edx",&DWP(1,"edx"));
330         &jmp    (&label("lot"));
331 &set_label("aligned");
332         &mov    (&DWP(0,"edx"),"eax");
333         &lea    ("ecx",&DWP(-4,"ecx"));
334         &test   ("ecx",-4);
335         &lea    ("edx",&DWP(4,"edx"));
336         &jnz    (&label("aligned"));
337         &cmp    ("ecx",0);
338         &jne    (&label("little"));
339         &ret    ();
340 &function_end_B("OPENSSL_cleanse");
341
342 &function_begin_B("OPENSSL_ia32_rdrand");
343         &mov    ("ecx",8);
344 &set_label("loop");
345         &rdrand ("eax");
346         &jc     (&label("break"));
347         &loop   (&label("loop"));
348 &set_label("break");
349         &cmp    ("eax",0);
350         &cmove  ("eax","ecx");
351         &ret    ();
352 &function_end_B("OPENSSL_ia32_rdrand");
353
354 &initseg("OPENSSL_cpuid_setup");
355
356 &asm_finish();