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1 #!/usr/bin/env perl | |
2 | |
3 # ==================================================================== | |
4 # Written by Andy Polyakov <appro@fy.chalmers.se> 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 # ==================================================================== | |
9 | |
10 # SHA1 block procedure for s390x. | |
11 | |
12 # April 2007. | |
13 # | |
14 # Performance is >30% better than gcc 3.3 generated code. But the real | |
15 # twist is that SHA1 hardware support is detected and utilized. In | |
16 # which case performance can reach further >4.5x for larger chunks. | |
17 | |
18 # January 2009. | |
19 # | |
20 # Optimize Xupdate for amount of memory references and reschedule | |
21 # instructions to favour dual-issue z10 pipeline. On z10 hardware is | |
22 # "only" ~2.3x faster than software. | |
23 | |
24 # November 2010. | |
25 # | |
26 # Adapt for -m31 build. If kernel supports what's called "highgprs" | |
27 # feature on Linux [see /proc/cpuinfo], it's possible to use 64-bit | |
28 # instructions and achieve "64-bit" performance even in 31-bit legacy | |
29 # application context. The feature is not specific to any particular | |
30 # processor, as long as it's "z-CPU". Latter implies that the code | |
31 # remains z/Architecture specific. | |
32 | |
33 $kimdfunc=1; # magic function code for kimd instruction | |
34 | |
35 $flavour = shift; | |
36 | |
37 if ($flavour =~ /3[12]/) { | |
38 $SIZE_T=4; | |
39 $g=""; | |
40 } else { | |
41 $SIZE_T=8; | |
42 $g="g"; | |
43 } | |
44 | |
45 while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {} | |
46 open STDOUT,">$output"; | |
47 | |
48 $K_00_39="%r0"; $K=$K_00_39; | |
49 $K_40_79="%r1"; | |
50 $ctx="%r2"; $prefetch="%r2"; | |
51 $inp="%r3"; | |
52 $len="%r4"; | |
53 | |
54 $A="%r5"; | |
55 $B="%r6"; | |
56 $C="%r7"; | |
57 $D="%r8"; | |
58 $E="%r9"; @V=($A,$B,$C,$D,$E); | |
59 $t0="%r10"; | |
60 $t1="%r11"; | |
61 @X=("%r12","%r13","%r14"); | |
62 $sp="%r15"; | |
63 | |
64 $stdframe=16*$SIZE_T+4*8; | |
65 $frame=$stdframe+16*4; | |
66 | |
67 sub Xupdate { | |
68 my $i=shift; | |
69 | |
70 $code.=<<___ if ($i==15); | |
71 lg $prefetch,$stdframe($sp) ### Xupdate(16) warm-up | |
72 lr $X[0],$X[2] | |
73 ___ | |
74 return if ($i&1); # Xupdate is vectorized and executed every 2nd cycle | |
75 $code.=<<___ if ($i<16); | |
76 lg $X[0],`$i*4`($inp) ### Xload($i) | |
77 rllg $X[1],$X[0],32 | |
78 ___ | |
79 $code.=<<___ if ($i>=16); | |
80 xgr $X[0],$prefetch ### Xupdate($i) | |
81 lg $prefetch,`$stdframe+4*(($i+2)%16)`($sp) | |
82 xg $X[0],`$stdframe+4*(($i+8)%16)`($sp) | |
83 xgr $X[0],$prefetch | |
84 rll $X[0],$X[0],1 | |
85 rllg $X[1],$X[0],32 | |
86 rll $X[1],$X[1],1 | |
87 rllg $X[0],$X[1],32 | |
88 lr $X[2],$X[1] # feedback | |
89 ___ | |
90 $code.=<<___ if ($i<=70); | |
91 stg $X[0],`$stdframe+4*($i%16)`($sp) | |
92 ___ | |
93 unshift(@X,pop(@X)); | |
94 } | |
95 | |
96 sub BODY_00_19 { | |
97 my ($i,$a,$b,$c,$d,$e)=@_; | |
98 my $xi=$X[1]; | |
99 | |
100 &Xupdate($i); | |
101 $code.=<<___; | |
102 alr $e,$K ### $i | |
103 rll $t1,$a,5 | |
104 lr $t0,$d | |
105 xr $t0,$c | |
106 alr $e,$t1 | |
107 nr $t0,$b | |
108 alr $e,$xi | |
109 xr $t0,$d | |
110 rll $b,$b,30 | |
111 alr $e,$t0 | |
112 ___ | |
113 } | |
114 | |
115 sub BODY_20_39 { | |
116 my ($i,$a,$b,$c,$d,$e)=@_; | |
117 my $xi=$X[1]; | |
118 | |
119 &Xupdate($i); | |
120 $code.=<<___; | |
121 alr $e,$K ### $i | |
122 rll $t1,$a,5 | |
123 lr $t0,$b | |
124 alr $e,$t1 | |
125 xr $t0,$c | |
126 alr $e,$xi | |
127 xr $t0,$d | |
128 rll $b,$b,30 | |
129 alr $e,$t0 | |
130 ___ | |
131 } | |
132 | |
133 sub BODY_40_59 { | |
134 my ($i,$a,$b,$c,$d,$e)=@_; | |
135 my $xi=$X[1]; | |
136 | |
137 &Xupdate($i); | |
138 $code.=<<___; | |
139 alr $e,$K ### $i | |
140 rll $t1,$a,5 | |
141 lr $t0,$b | |
142 alr $e,$t1 | |
143 or $t0,$c | |
144 lr $t1,$b | |
145 nr $t0,$d | |
146 nr $t1,$c | |
147 alr $e,$xi | |
148 or $t0,$t1 | |
149 rll $b,$b,30 | |
150 alr $e,$t0 | |
151 ___ | |
152 } | |
153 | |
154 $code.=<<___; | |
155 .text | |
156 .align 64 | |
157 .type Ktable,\@object | |
158 Ktable: .long 0x5a827999,0x6ed9eba1,0x8f1bbcdc,0xca62c1d6 | |
159 .skip 48 #.long 0,0,0,0,0,0,0,0,0,0,0,0 | |
160 .size Ktable,.-Ktable | |
161 .globl sha1_block_data_order | |
162 .type sha1_block_data_order,\@function | |
163 sha1_block_data_order: | |
164 ___ | |
165 $code.=<<___ if ($kimdfunc); | |
166 larl %r1,OPENSSL_s390xcap_P | |
167 lg %r0,0(%r1) | |
168 tmhl %r0,0x4000 # check for message-security assist | |
169 jz .Lsoftware | |
170 lghi %r0,0 | |
171 la %r1,`2*$SIZE_T`($sp) | |
172 .long 0xb93e0002 # kimd %r0,%r2 | |
173 lg %r0,`2*$SIZE_T`($sp) | |
174 tmhh %r0,`0x8000>>$kimdfunc` | |
175 jz .Lsoftware | |
176 lghi %r0,$kimdfunc | |
177 lgr %r1,$ctx | |
178 lgr %r2,$inp | |
179 sllg %r3,$len,6 | |
180 .long 0xb93e0002 # kimd %r0,%r2 | |
181 brc 1,.-4 # pay attention to "partial completion" | |
182 br %r14 | |
183 .align 16 | |
184 .Lsoftware: | |
185 ___ | |
186 $code.=<<___; | |
187 lghi %r1,-$frame | |
188 st${g} $ctx,`2*$SIZE_T`($sp) | |
189 stm${g} %r6,%r15,`6*$SIZE_T`($sp) | |
190 lgr %r0,$sp | |
191 la $sp,0(%r1,$sp) | |
192 st${g} %r0,0($sp) | |
193 | |
194 larl $t0,Ktable | |
195 llgf $A,0($ctx) | |
196 llgf $B,4($ctx) | |
197 llgf $C,8($ctx) | |
198 llgf $D,12($ctx) | |
199 llgf $E,16($ctx) | |
200 | |
201 lg $K_00_39,0($t0) | |
202 lg $K_40_79,8($t0) | |
203 | |
204 .Lloop: | |
205 rllg $K_00_39,$K_00_39,32 | |
206 ___ | |
207 for ($i=0;$i<20;$i++) { &BODY_00_19($i,@V); unshift(@V,pop(@V)); } | |
208 $code.=<<___; | |
209 rllg $K_00_39,$K_00_39,32 | |
210 ___ | |
211 for (;$i<40;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); } | |
212 $code.=<<___; $K=$K_40_79; | |
213 rllg $K_40_79,$K_40_79,32 | |
214 ___ | |
215 for (;$i<60;$i++) { &BODY_40_59($i,@V); unshift(@V,pop(@V)); } | |
216 $code.=<<___; | |
217 rllg $K_40_79,$K_40_79,32 | |
218 ___ | |
219 for (;$i<80;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); } | |
220 $code.=<<___; | |
221 | |
222 l${g} $ctx,`$frame+2*$SIZE_T`($sp) | |
223 la $inp,64($inp) | |
224 al $A,0($ctx) | |
225 al $B,4($ctx) | |
226 al $C,8($ctx) | |
227 al $D,12($ctx) | |
228 al $E,16($ctx) | |
229 st $A,0($ctx) | |
230 st $B,4($ctx) | |
231 st $C,8($ctx) | |
232 st $D,12($ctx) | |
233 st $E,16($ctx) | |
234 brct${g} $len,.Lloop | |
235 | |
236 lm${g} %r6,%r15,`$frame+6*$SIZE_T`($sp) | |
237 br %r14 | |
238 .size sha1_block_data_order,.-sha1_block_data_order | |
239 .string "SHA1 block transform for s390x, CRYPTOGAMS by <appro\@openssl.org>" | |
240 .comm OPENSSL_s390xcap_P,16,8 | |
241 ___ | |
242 | |
243 $code =~ s/\`([^\`]*)\`/eval $1/gem; | |
244 | |
245 print $code; | |
246 close STDOUT; | |
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