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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 # SHA256 block procedure for ARMv4. May 2007. | |
11 | |
12 # Performance is ~2x better than gcc 3.4 generated code and in "abso- | |
13 # lute" terms is ~2250 cycles per 64-byte block or ~35 cycles per | |
14 # byte [on single-issue Xscale PXA250 core]. | |
15 | |
16 # July 2010. | |
17 # | |
18 # Rescheduling for dual-issue pipeline resulted in 22% improvement on | |
19 # Cortex A8 core and ~20 cycles per processed byte. | |
20 | |
21 # February 2011. | |
22 # | |
23 # Profiler-assisted and platform-specific optimization resulted in 16% | |
24 # improvement on Cortex A8 core and ~17 cycles per processed byte. | |
25 | |
26 while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {} | |
27 open STDOUT,">$output"; | |
28 | |
29 $ctx="r0"; $t0="r0"; | |
30 $inp="r1"; $t3="r1"; | |
31 $len="r2"; $t1="r2"; | |
32 $T1="r3"; | |
33 $A="r4"; | |
34 $B="r5"; | |
35 $C="r6"; | |
36 $D="r7"; | |
37 $E="r8"; | |
38 $F="r9"; | |
39 $G="r10"; | |
40 $H="r11"; | |
41 @V=($A,$B,$C,$D,$E,$F,$G,$H); | |
42 $t2="r12"; | |
43 $Ktbl="r14"; | |
44 | |
45 @Sigma0=( 2,13,22); | |
46 @Sigma1=( 6,11,25); | |
47 @sigma0=( 7,18, 3); | |
48 @sigma1=(17,19,10); | |
49 | |
50 sub BODY_00_15 { | |
51 my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_; | |
52 | |
53 $code.=<<___ if ($i<16); | |
54 #if __ARM_ARCH__>=7 | |
55 ldr $T1,[$inp],#4 | |
56 #else | |
57 ldrb $T1,[$inp,#3] @ $i | |
58 ldrb $t2,[$inp,#2] | |
59 ldrb $t1,[$inp,#1] | |
60 ldrb $t0,[$inp],#4 | |
61 orr $T1,$T1,$t2,lsl#8 | |
62 orr $T1,$T1,$t1,lsl#16 | |
63 orr $T1,$T1,$t0,lsl#24 | |
64 #endif | |
65 ___ | |
66 $code.=<<___; | |
67 mov $t0,$e,ror#$Sigma1[0] | |
68 ldr $t2,[$Ktbl],#4 @ *K256++ | |
69 eor $t0,$t0,$e,ror#$Sigma1[1] | |
70 eor $t1,$f,$g | |
71 #if $i>=16 | |
72 add $T1,$T1,$t3 @ from BODY_16_xx | |
73 #elif __ARM_ARCH__>=7 && defined(__ARMEL__) | |
74 rev $T1,$T1 | |
75 #endif | |
76 #if $i==15 | |
77 str $inp,[sp,#17*4] @ leave room for $t3 | |
78 #endif | |
79 eor $t0,$t0,$e,ror#$Sigma1[2] @ Sigma1(e) | |
80 and $t1,$t1,$e | |
81 str $T1,[sp,#`$i%16`*4] | |
82 add $T1,$T1,$t0 | |
83 eor $t1,$t1,$g @ Ch(e,f,g) | |
84 add $T1,$T1,$h | |
85 mov $h,$a,ror#$Sigma0[0] | |
86 add $T1,$T1,$t1 | |
87 eor $h,$h,$a,ror#$Sigma0[1] | |
88 add $T1,$T1,$t2 | |
89 eor $h,$h,$a,ror#$Sigma0[2] @ Sigma0(a) | |
90 #if $i>=15 | |
91 ldr $t3,[sp,#`($i+2)%16`*4] @ from BODY_16_xx | |
92 #endif | |
93 orr $t0,$a,$b | |
94 and $t1,$a,$b | |
95 and $t0,$t0,$c | |
96 add $h,$h,$T1 | |
97 orr $t0,$t0,$t1 @ Maj(a,b,c) | |
98 add $d,$d,$T1 | |
99 add $h,$h,$t0 | |
100 ___ | |
101 } | |
102 | |
103 sub BODY_16_XX { | |
104 my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_; | |
105 | |
106 $code.=<<___; | |
107 @ ldr $t3,[sp,#`($i+1)%16`*4] @ $i | |
108 ldr $t2,[sp,#`($i+14)%16`*4] | |
109 mov $t0,$t3,ror#$sigma0[0] | |
110 ldr $T1,[sp,#`($i+0)%16`*4] | |
111 eor $t0,$t0,$t3,ror#$sigma0[1] | |
112 ldr $t1,[sp,#`($i+9)%16`*4] | |
113 eor $t0,$t0,$t3,lsr#$sigma0[2] @ sigma0(X[i+1]) | |
114 mov $t3,$t2,ror#$sigma1[0] | |
115 add $T1,$T1,$t0 | |
116 eor $t3,$t3,$t2,ror#$sigma1[1] | |
117 add $T1,$T1,$t1 | |
118 eor $t3,$t3,$t2,lsr#$sigma1[2] @ sigma1(X[i+14]) | |
119 @ add $T1,$T1,$t3 | |
120 ___ | |
121 &BODY_00_15(@_); | |
122 } | |
123 | |
124 $code=<<___; | |
125 #include "arm_arch.h" | |
126 | |
127 .text | |
128 .code 32 | |
129 | |
130 .type K256,%object | |
131 .align 5 | |
132 K256: | |
133 .word 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5 | |
134 .word 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5 | |
135 .word 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3 | |
136 .word 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174 | |
137 .word 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc | |
138 .word 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da | |
139 .word 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7 | |
140 .word 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967 | |
141 .word 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13 | |
142 .word 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85 | |
143 .word 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3 | |
144 .word 0xd192e819,0xd6990624,0xf40e3585,0x106aa070 | |
145 .word 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5 | |
146 .word 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3 | |
147 .word 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208 | |
148 .word 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2 | |
149 .size K256,.-K256 | |
150 | |
151 .global sha256_block_data_order | |
152 .type sha256_block_data_order,%function | |
153 sha256_block_data_order: | |
154 sub r3,pc,#8 @ sha256_block_data_order | |
155 add $len,$inp,$len,lsl#6 @ len to point at the end of inp | |
156 stmdb sp!,{$ctx,$inp,$len,r4-r11,lr} | |
157 ldmia $ctx,{$A,$B,$C,$D,$E,$F,$G,$H} | |
158 sub $Ktbl,r3,#256 @ K256 | |
159 sub sp,sp,#16*4 @ alloca(X[16]) | |
160 .Loop: | |
161 ___ | |
162 for($i=0;$i<16;$i++) { &BODY_00_15($i,@V); unshift(@V,pop(@V)); } | |
163 $code.=".Lrounds_16_xx:\n"; | |
164 for (;$i<32;$i++) { &BODY_16_XX($i,@V); unshift(@V,pop(@V)); } | |
165 $code.=<<___; | |
166 and $t2,$t2,#0xff | |
167 cmp $t2,#0xf2 | |
168 bne .Lrounds_16_xx | |
169 | |
170 ldr $T1,[sp,#16*4] @ pull ctx | |
171 ldr $t0,[$T1,#0] | |
172 ldr $t1,[$T1,#4] | |
173 ldr $t2,[$T1,#8] | |
174 add $A,$A,$t0 | |
175 ldr $t0,[$T1,#12] | |
176 add $B,$B,$t1 | |
177 ldr $t1,[$T1,#16] | |
178 add $C,$C,$t2 | |
179 ldr $t2,[$T1,#20] | |
180 add $D,$D,$t0 | |
181 ldr $t0,[$T1,#24] | |
182 add $E,$E,$t1 | |
183 ldr $t1,[$T1,#28] | |
184 add $F,$F,$t2 | |
185 ldr $inp,[sp,#17*4] @ pull inp | |
186 ldr $t2,[sp,#18*4] @ pull inp+len | |
187 add $G,$G,$t0 | |
188 add $H,$H,$t1 | |
189 stmia $T1,{$A,$B,$C,$D,$E,$F,$G,$H} | |
190 cmp $inp,$t2 | |
191 sub $Ktbl,$Ktbl,#256 @ rewind Ktbl | |
192 bne .Loop | |
193 | |
194 add sp,sp,#`16+3`*4 @ destroy frame | |
195 #if __ARM_ARCH__>=5 | |
196 ldmia sp!,{r4-r11,pc} | |
197 #else | |
198 ldmia sp!,{r4-r11,lr} | |
199 tst lr,#1 | |
200 moveq pc,lr @ be binary compatible with V4, yet | |
201 bx lr @ interoperable with Thumb ISA:-) | |
202 #endif | |
203 .size sha256_block_data_order,.-sha256_block_data_order | |
204 .asciz "SHA256 block transform for ARMv4, CRYPTOGAMS by <appro\@openssl.org>" | |
205 .align 2 | |
206 ___ | |
207 | |
208 $code =~ s/\`([^\`]*)\`/eval $1/gem; | |
209 $code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm; # make it possible to compile wi
th -march=armv4 | |
210 print $code; | |
211 close STDOUT; # enforce flush | |
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