3 # ====================================================================
4 # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
5 # project. The module is, however, dual licensed under OpenSSL and
6 # CRYPTOGAMS licenses depending on where you obtain it. For further
7 # details see http://www.openssl.org/~appro/cryptogams/.
8 # ====================================================================
12 # The module implements "4-bit" GCM GHASH function and underlying
13 # single multiplication operation in GF(2^128). "4-bit" means that it
14 # uses 256 bytes per-key table [+128 bytes shared table]. Performance
15 # results are for streamed GHASH subroutine and are expressed in
16 # cycles per processed byte, less is better:
20 # Opteron 18.5 10.2 +80%
21 # Core2 17.5 11.0 +59%
25 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
27 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
29 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
30 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
31 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
32 die "can't locate x86_64-xlate.pl";
34 open STDOUT,"| $^X $xlate $flavour $output";
36 # common register layout
47 # per-function register layout
51 sub lo() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/;
52 $r =~ s/%[er]([sd]i)/%\1l/;
53 $r =~ s/%(r[0-9]+)[d]?/%\1b/; $r; }
63 mov `&lo("$Zlo")`,`&lo("$nlo")`
64 mov `&lo("$Zlo")`,`&lo("$nhi")`
67 mov 8($Htbl,$nlo),$Zlo
69 and \$0xf0,`&lo("$nhi")`
78 mov ($inp,$cnt),`&lo("$nlo")`
80 xor 8($Htbl,$nhi),$Zlo
83 mov `&lo("$nlo")`,`&lo("$nhi")`
84 xor ($rem_4bit,$rem,8),$Zhi
95 xor 8($Htbl,$nlo),$Zlo
98 and \$0xf0,`&lo("$nhi")`
99 xor ($rem_4bit,$rem,8),$Zhi
110 xor 8($Htbl,$nlo),$Zlo
112 xor ($Htbl,$nlo),$Zhi
113 and \$0xf0,`&lo("$nhi")`
114 xor ($rem_4bit,$rem,8),$Zhi
122 xor 8($Htbl,$nhi),$Zlo
124 xor ($Htbl,$nhi),$Zhi
126 xor ($rem_4bit,$rem,8),$Zhi
136 .globl gcm_gmult_4bit
137 .type gcm_gmult_4bit,\@function,2
141 push %rbp # %rbp and %r12 are pushed exclusively in
142 push %r12 # order to reuse Win64 exception handler...
146 lea .Lrem_4bit(%rip),$rem_4bit
157 .size gcm_gmult_4bit,.-gcm_gmult_4bit
161 # per-function register layout
169 .globl gcm_ghash_4bit
170 .type gcm_ghash_4bit,\@function,4
181 lea .Lrem_4bit(%rip),$rem_4bit
205 .size gcm_ghash_4bit,.-gcm_ghash_4bit
208 .type rem_4bit,\@object
210 .long 0,`0x0000<<16`,0,`0x1C20<<16`,0,`0x3840<<16`,0,`0x2460<<16`
211 .long 0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
212 .long 0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
213 .long 0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
214 .asciz "GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
218 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
219 # CONTEXT *context,DISPATCHER_CONTEXT *disp)
227 .extern __imp_RtlVirtualUnwind
228 .type se_handler,\@abi-omnipotent
242 mov 120($context),%rax # pull context->Rax
243 mov 248($context),%rbx # pull context->Rip
245 mov 8($disp),%rsi # disp->ImageBase
246 mov 56($disp),%r11 # disp->HandlerData
248 mov 0(%r11),%r10d # HandlerData[0]
249 lea (%rsi,%r10),%r10 # prologue label
250 cmp %r10,%rbx # context->Rip<prologue label
253 mov 152($context),%rax # pull context->Rsp
255 mov 4(%r11),%r10d # HandlerData[1]
256 lea (%rsi,%r10),%r10 # epilogue label
257 cmp %r10,%rbx # context->Rip>=epilogue label
260 lea 24(%rax),%rax # adjust "rsp"
265 mov %rbx,144($context) # restore context->Rbx
266 mov %rbp,160($context) # restore context->Rbp
267 mov %r12,216($context) # restore context->R12
272 mov %rax,152($context) # restore context->Rsp
273 mov %rsi,168($context) # restore context->Rsi
274 mov %rdi,176($context) # restore context->Rdi
276 mov 40($disp),%rdi # disp->ContextRecord
277 mov $context,%rsi # context
278 mov \$`1232/8`,%ecx # sizeof(CONTEXT)
279 .long 0xa548f3fc # cld; rep movsq
282 xor %rcx,%rcx # arg1, UNW_FLAG_NHANDLER
283 mov 8(%rsi),%rdx # arg2, disp->ImageBase
284 mov 0(%rsi),%r8 # arg3, disp->ControlPc
285 mov 16(%rsi),%r9 # arg4, disp->FunctionEntry
286 mov 40(%rsi),%r10 # disp->ContextRecord
287 lea 56(%rsi),%r11 # &disp->HandlerData
288 lea 24(%rsi),%r12 # &disp->EstablisherFrame
289 mov %r10,32(%rsp) # arg5
290 mov %r11,40(%rsp) # arg6
291 mov %r12,48(%rsp) # arg7
292 mov %rcx,56(%rsp) # arg8, (NULL)
293 call *__imp_RtlVirtualUnwind(%rip)
295 mov \$1,%eax # ExceptionContinueSearch
307 .size se_handler,.-se_handler
311 .rva .LSEH_begin_gcm_gmult_4bit
312 .rva .LSEH_end_gcm_gmult_4bit
313 .rva .LSEH_info_gcm_gmult_4bit
315 .rva .LSEH_begin_gcm_ghash_4bit
316 .rva .LSEH_end_gcm_ghash_4bit
317 .rva .LSEH_info_gcm_ghash_4bit
321 .LSEH_info_gcm_gmult_4bit:
324 .rva .Lgmult_prologue,.Lgmult_epilogue # HandlerData
325 .LSEH_info_gcm_ghash_4bit:
328 .rva .Lghash_prologue,.Lghash_epilogue # HandlerData
331 $code =~ s/\`([^\`]*)\`/eval($1)/gem;