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      1 #!/usr/bin/env perl
      2 #
      3 # ====================================================================
      4 # Written by Andy Polyakov <appro (at] fy.chalmers.se> for the OpenSSL
      5 # project. Rights for redistribution and usage in source and binary
      6 # forms are granted according to the OpenSSL license.
      7 # ====================================================================
      8 #
      9 # sha256/512_block procedure for x86_64.
     10 #
     11 # 40% improvement over compiler-generated code on Opteron. On EM64T
     12 # sha256 was observed to run >80% faster and sha512 - >40%. No magical
     13 # tricks, just straight implementation... I really wonder why gcc
     14 # [being armed with inline assembler] fails to generate as fast code.
     15 # The only thing which is cool about this module is that it's very
     16 # same instruction sequence used for both SHA-256 and SHA-512. In
     17 # former case the instructions operate on 32-bit operands, while in
     18 # latter - on 64-bit ones. All I had to do is to get one flavor right,
     19 # the other one passed the test right away:-)
     20 #
     21 # sha256_block runs in ~1005 cycles on Opteron, which gives you
     22 # asymptotic performance of 64*1000/1005=63.7MBps times CPU clock
     23 # frequency in GHz. sha512_block runs in ~1275 cycles, which results
     24 # in 128*1000/1275=100MBps per GHz. Is there room for improvement?
     25 # Well, if you compare it to IA-64 implementation, which maintains
     26 # X[16] in register bank[!], tends to 4 instructions per CPU clock
     27 # cycle and runs in 1003 cycles, 1275 is very good result for 3-way
     28 # issue Opteron pipeline and X[16] maintained in memory. So that *if*
     29 # there is a way to improve it, *then* the only way would be to try to
     30 # offload X[16] updates to SSE unit, but that would require "deeper"
     31 # loop unroll, which in turn would naturally cause size blow-up, not
     32 # to mention increased complexity! And once again, only *if* it's
     33 # actually possible to noticeably improve overall ILP, instruction
     34 # level parallelism, on a given CPU implementation in this case.
     35 #
     36 # Special note on Intel EM64T. While Opteron CPU exhibits perfect
     37 # perfromance ratio of 1.5 between 64- and 32-bit flavors [see above],
     38 # [currently available] EM64T CPUs apparently are far from it. On the
     39 # contrary, 64-bit version, sha512_block, is ~30% *slower* than 32-bit
     40 # sha256_block:-( This is presumably because 64-bit shifts/rotates
     41 # apparently are not atomic instructions, but implemented in microcode.
     42 
     43 #
     44 # OpenSolaris OS modifications
     45 #
     46 # Sun elects to use this software under the BSD license.
     47 #
     48 # This source originates from OpenSSL file sha512-x86_64.pl at
     49 # ftp://ftp.openssl.org/snapshot/openssl-0.9.8-stable-SNAP-20080131.tar.gz
     50 # (presumably for future OpenSSL release 0.9.8h), with these changes:
     51 #
     52 # 1. Added perl "use strict" and declared variables.
     53 #
     54 # 2. Added OpenSolaris ENTRY_NP/SET_SIZE macros from
     55 # /usr/include/sys/asm_linkage.h, .ident keywords, and lint(1B) guards.
     56 #
     57 # 3. Removed x86_64-xlate.pl script (not needed for as(1) or gas(1)
     58 # assemblers).  Replaced the .picmeup macro with assembler code.
     59 #
     60 # 4. Added 8 to $ctx, as OpenSolaris OS has an extra 4-byte field, "algotype",
     61 # at the beginning of SHA2_CTX (the next field is 8-byte aligned).
     62 #
     63 
     64 use strict;
     65 my ($code, $func, $TABLE, $SZ, @Sigma0, @Sigma1, @sigma0, @sigma1, $rounds,
     66 	@ROT, $A, $B, $C, $D, $E, $F, $G, $H, $T1, $a0, $a1, $a2, $i,
     67 	$ctx, $round, $inp, $Tbl, $_ctx, $_inp, $_end, $_rsp, $framesz);
     68 my $output = shift;
     69 open STDOUT,">$output";
     70 
     71 #
     72 # OpenSSL library:
     73 # void sha512_block_data_order(SHA512_CTX *ctx, const void *in, size_t num);
     74 # void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num);
     75 #
     76 # OpenSolaris OS:
     77 # void SHA512TransformBlocks(SHA2_CTX *ctx, const void *in, size_t num);
     78 # void SHA256TransformBlocks(SHA2_CTX *ctx, const void *in, size_t num);
     79 # Note: the OpenSolaris SHA2 structure has an extra 8 byte field at the
     80 # beginning (over OpenSSL's SHA512 or SHA256 structure).
     81 #
     82 
     83 if ($output =~ /512/) {
     84 	$func="SHA512TransformBlocks";
     85 	$TABLE="K512";
     86 	$SZ=8;
     87 	@ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx",
     88 					"%r8", "%r9", "%r10","%r11");
     89 	($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15");
     90 	@Sigma0=(28,34,39);
     91 	@Sigma1=(14,18,41);
     92 	@sigma0=(1,  8, 7);
     93 	@sigma1=(19,61, 6);
     94 	$rounds=80;
     95 } else {
     96 	$func="SHA256TransformBlocks";
     97 	$TABLE="K256";
     98 	$SZ=4;
     99 	@ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx",
    100 					"%r8d","%r9d","%r10d","%r11d");
    101 	($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d");
    102 	@Sigma0=( 2,13,22);
    103 	@Sigma1=( 6,11,25);
    104 	@sigma0=( 7,18, 3);
    105 	@sigma1=(17,19,10);
    106 	$rounds=64;
    107 }
    108 
    109 $ctx="%rdi";	# 1st arg
    110 $round="%rdi";	# zaps $ctx
    111 $inp="%rsi";	# 2nd arg
    112 $Tbl="%rbp";
    113 
    114 $_ctx="16*$SZ+0*8(%rsp)";
    115 $_inp="16*$SZ+1*8(%rsp)";
    116 $_end="16*$SZ+2*8(%rsp)";
    117 $_rsp="16*$SZ+3*8(%rsp)";
    118 $framesz="16*$SZ+4*8";
    119 
    120 
    121 sub ROUND_00_15()
    122 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
    123 
    124 $code.=<<___;
    125 	mov	$e,$a0
    126 	mov	$e,$a1
    127 	mov	$f,$a2
    128 
    129 	ror	\$$Sigma1[0],$a0
    130 	ror	\$$Sigma1[1],$a1
    131 	xor	$g,$a2			# f^g
    132 
    133 	xor	$a1,$a0
    134 	ror	\$`$Sigma1[2]-$Sigma1[1]`,$a1
    135 	and	$e,$a2			# (f^g)&e
    136 	mov	$T1,`$SZ*($i&0xf)`(%rsp)
    137 
    138 	xor	$a1,$a0			# Sigma1(e)
    139 	xor	$g,$a2			# Ch(e,f,g)=((f^g)&e)^g
    140 	add	$h,$T1			# T1+=h
    141 
    142 	mov	$a,$h
    143 	add	$a0,$T1			# T1+=Sigma1(e)
    144 
    145 	add	$a2,$T1			# T1+=Ch(e,f,g)
    146 	mov	$a,$a0
    147 	mov	$a,$a1
    148 
    149 	ror	\$$Sigma0[0],$h
    150 	ror	\$$Sigma0[1],$a0
    151 	mov	$a,$a2
    152 	add	($Tbl,$round,$SZ),$T1	# T1+=K[round]
    153 
    154 	xor	$a0,$h
    155 	ror	\$`$Sigma0[2]-$Sigma0[1]`,$a0
    156 	or	$c,$a1			# a|c
    157 
    158 	xor	$a0,$h			# h=Sigma0(a)
    159 	and	$c,$a2			# a&c
    160 	add	$T1,$d			# d+=T1
    161 
    162 	and	$b,$a1			# (a|c)&b
    163 	add	$T1,$h			# h+=T1
    164 
    165 	or	$a2,$a1			# Maj(a,b,c)=((a|c)&b)|(a&c)
    166 	lea	1($round),$round	# round++
    167 
    168 	add	$a1,$h			# h+=Maj(a,b,c)
    169 ___
    170 }
    171 
    172 sub ROUND_16_XX()
    173 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
    174 
    175 $code.=<<___;
    176 	mov	`$SZ*(($i+1)&0xf)`(%rsp),$a0
    177 	mov	`$SZ*(($i+14)&0xf)`(%rsp),$T1
    178 
    179 	mov	$a0,$a2
    180 
    181 	shr	\$$sigma0[2],$a0
    182 	ror	\$$sigma0[0],$a2
    183 
    184 	xor	$a2,$a0
    185 	ror	\$`$sigma0[1]-$sigma0[0]`,$a2
    186 
    187 	xor	$a2,$a0			# sigma0(X[(i+1)&0xf])
    188 	mov	$T1,$a1
    189 
    190 	shr	\$$sigma1[2],$T1
    191 	ror	\$$sigma1[0],$a1
    192 
    193 	xor	$a1,$T1
    194 	ror	\$`$sigma1[1]-$sigma1[0]`,$a1
    195 
    196 	xor	$a1,$T1			# sigma1(X[(i+14)&0xf])
    197 
    198 	add	$a0,$T1
    199 
    200 	add	`$SZ*(($i+9)&0xf)`(%rsp),$T1
    201 
    202 	add	`$SZ*($i&0xf)`(%rsp),$T1
    203 ___
    204 	&ROUND_00_15(@_);
    205 }
    206 
    207 #
    208 # Execution begins here
    209 #
    210 
    211 $code=<<___;
    212 #if defined(lint) || defined(__lint)
    213 #include <sys/stdint.h>
    214 #include <sys/sha2.h>
    215 
    216 /* ARGSUSED */
    217 void
    218 $func(SHA2_CTX *ctx, const void *in, size_t num)
    219 {
    220 }
    221 
    222 
    223 #else
    224 #include <sys/asm_linkage.h>
    225 
    226 ENTRY_NP($func)
    227 	push	%rbx
    228 	push	%rbp
    229 	push	%r12
    230 	push	%r13
    231 	push	%r14
    232 	push	%r15
    233 	mov	%rsp,%rbp		# copy %rsp
    234 	shl	\$4,%rdx		# num*16
    235 	sub	\$$framesz,%rsp
    236 	lea	($inp,%rdx,$SZ),%rdx	# inp+num*16*$SZ
    237 	and	\$-64,%rsp		# align stack frame
    238 	add	\$8,$ctx		# Skip OpenSolaris field, "algotype"
    239 	mov	$ctx,$_ctx		# save ctx, 1st arg
    240 	mov	$inp,$_inp		# save inp, 2nd arg
    241 	mov	%rdx,$_end		# save end pointer, "3rd" arg
    242 	mov	%rbp,$_rsp		# save copy of %rsp
    243 
    244 	/.picmeup $Tbl
    245 	/ The .picmeup pseudo-directive, from perlasm/x86_64_xlate.pl, puts
    246 	/ the address of the "next" instruction into the target register
    247 	/ ($Tbl).  This generates these 2 instructions:
    248 	lea	.Llea(%rip),$Tbl
    249 	/nop	/ .picmeup generates a nop for mod 8 alignment--not needed here
    250 
    251 .Llea:
    252 	lea	$TABLE-.($Tbl),$Tbl
    253 
    254 	mov	$SZ*0($ctx),$A
    255 	mov	$SZ*1($ctx),$B
    256 	mov	$SZ*2($ctx),$C
    257 	mov	$SZ*3($ctx),$D
    258 	mov	$SZ*4($ctx),$E
    259 	mov	$SZ*5($ctx),$F
    260 	mov	$SZ*6($ctx),$G
    261 	mov	$SZ*7($ctx),$H
    262 	jmp	.Lloop
    263 
    264 .align	16
    265 .Lloop:
    266 	xor	$round,$round
    267 ___
    268 	for($i=0;$i<16;$i++) {
    269 		$code.="	mov	$SZ*$i($inp),$T1\n";
    270 		$code.="	bswap	$T1\n";
    271 		&ROUND_00_15($i,@ROT);
    272 		unshift(@ROT,pop(@ROT));
    273 	}
    274 $code.=<<___;
    275 	jmp	.Lrounds_16_xx
    276 .align	16
    277 .Lrounds_16_xx:
    278 ___
    279 	for(;$i<32;$i++) {
    280 		&ROUND_16_XX($i,@ROT);
    281 		unshift(@ROT,pop(@ROT));
    282 	}
    283 
    284 $code.=<<___;
    285 	cmp	\$$rounds,$round
    286 	jb	.Lrounds_16_xx
    287 
    288 	mov	$_ctx,$ctx
    289 	lea	16*$SZ($inp),$inp
    290 
    291 	add	$SZ*0($ctx),$A
    292 	add	$SZ*1($ctx),$B
    293 	add	$SZ*2($ctx),$C
    294 	add	$SZ*3($ctx),$D
    295 	add	$SZ*4($ctx),$E
    296 	add	$SZ*5($ctx),$F
    297 	add	$SZ*6($ctx),$G
    298 	add	$SZ*7($ctx),$H
    299 
    300 	cmp	$_end,$inp
    301 
    302 	mov	$A,$SZ*0($ctx)
    303 	mov	$B,$SZ*1($ctx)
    304 	mov	$C,$SZ*2($ctx)
    305 	mov	$D,$SZ*3($ctx)
    306 	mov	$E,$SZ*4($ctx)
    307 	mov	$F,$SZ*5($ctx)
    308 	mov	$G,$SZ*6($ctx)
    309 	mov	$H,$SZ*7($ctx)
    310 	jb	.Lloop
    311 
    312 	mov	$_rsp,%rsp
    313 	pop	%r15
    314 	pop	%r14
    315 	pop	%r13
    316 	pop	%r12
    317 	pop	%rbp
    318 	pop	%rbx
    319 
    320 	ret
    321 SET_SIZE($func)
    322 
    323 ___
    324 
    325 if ($SZ==4) {
    326 # SHA256
    327 $code.=<<___;
    328 .align	64
    329 .type	$TABLE,\@object
    330 $TABLE:
    331 	.long	0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
    332 	.long	0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
    333 	.long	0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
    334 	.long	0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
    335 	.long	0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
    336 	.long	0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
    337 	.long	0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
    338 	.long	0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
    339 	.long	0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
    340 	.long	0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
    341 	.long	0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
    342 	.long	0xd192e819,0xd6990624,0xf40e3585,0x106aa070
    343 	.long	0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
    344 	.long	0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
    345 	.long	0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
    346 	.long	0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
    347 ___
    348 } else {
    349 # SHA512
    350 $code.=<<___;
    351 .align	64
    352 .type	$TABLE,\@object
    353 $TABLE:
    354 	.quad	0x428a2f98d728ae22,0x7137449123ef65cd
    355 	.quad	0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
    356 	.quad	0x3956c25bf348b538,0x59f111f1b605d019
    357 	.quad	0x923f82a4af194f9b,0xab1c5ed5da6d8118
    358 	.quad	0xd807aa98a3030242,0x12835b0145706fbe
    359 	.quad	0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
    360 	.quad	0x72be5d74f27b896f,0x80deb1fe3b1696b1
    361 	.quad	0x9bdc06a725c71235,0xc19bf174cf692694
    362 	.quad	0xe49b69c19ef14ad2,0xefbe4786384f25e3
    363 	.quad	0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
    364 	.quad	0x2de92c6f592b0275,0x4a7484aa6ea6e483
    365 	.quad	0x5cb0a9dcbd41fbd4,0x76f988da831153b5
    366 	.quad	0x983e5152ee66dfab,0xa831c66d2db43210
    367 	.quad	0xb00327c898fb213f,0xbf597fc7beef0ee4
    368 	.quad	0xc6e00bf33da88fc2,0xd5a79147930aa725
    369 	.quad	0x06ca6351e003826f,0x142929670a0e6e70
    370 	.quad	0x27b70a8546d22ffc,0x2e1b21385c26c926
    371 	.quad	0x4d2c6dfc5ac42aed,0x53380d139d95b3df
    372 	.quad	0x650a73548baf63de,0x766a0abb3c77b2a8
    373 	.quad	0x81c2c92e47edaee6,0x92722c851482353b
    374 	.quad	0xa2bfe8a14cf10364,0xa81a664bbc423001
    375 	.quad	0xc24b8b70d0f89791,0xc76c51a30654be30
    376 	.quad	0xd192e819d6ef5218,0xd69906245565a910
    377 	.quad	0xf40e35855771202a,0x106aa07032bbd1b8
    378 	.quad	0x19a4c116b8d2d0c8,0x1e376c085141ab53
    379 	.quad	0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
    380 	.quad	0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
    381 	.quad	0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
    382 	.quad	0x748f82ee5defb2fc,0x78a5636f43172f60
    383 	.quad	0x84c87814a1f0ab72,0x8cc702081a6439ec
    384 	.quad	0x90befffa23631e28,0xa4506cebde82bde9
    385 	.quad	0xbef9a3f7b2c67915,0xc67178f2e372532b
    386 	.quad	0xca273eceea26619c,0xd186b8c721c0c207
    387 	.quad	0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
    388 	.quad	0x06f067aa72176fba,0x0a637dc5a2c898a6
    389 	.quad	0x113f9804bef90dae,0x1b710b35131c471b
    390 	.quad	0x28db77f523047d84,0x32caab7b40c72493
    391 	.quad	0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
    392 	.quad	0x4cc5d4becb3e42b6,0x597f299cfc657e2a
    393 	.quad	0x5fcb6fab3ad6faec,0x6c44198c4a475817
    394 ___
    395 }
    396 $code.=<<___;
    397 #endif /* !lint && !__lint */
    398 ___
    399 
    400 $code =~ s/\`([^\`]*)\`/eval $1/gem;
    401 print $code;
    402 close STDOUT;
    403