| blob | 2d10e4c08f038f0bfc13fbf3555c357dfb3f5236 |
1 /*
2 * Fast SHA-256 implementation for SPE instruction set (PPC)
3 *
4 * This code makes use of the SPE SIMD instruction set as defined in
5 * http://cache.freescale.com/files/32bit/doc/ref_manual/SPEPIM.pdf
6 * Implementation is based on optimization guide notes from
7 * http://cache.freescale.com/files/32bit/doc/app_note/AN2665.pdf
8 *
9 * Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.de>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the Free
13 * Software Foundation; either version 2 of the License, or (at your option)
14 * any later version.
15 *
16 */
18 #include <asm/ppc_asm.h>
19 #include <asm/asm-offsets.h>
21 #define rHP r3 /* pointer to hash values in memory */
22 #define rKP r24 /* pointer to round constants */
23 #define rWP r4 /* pointer to input data */
25 #define rH0 r5 /* 8 32 bit hash values in 8 registers */
26 #define rH1 r6
27 #define rH2 r7
28 #define rH3 r8
29 #define rH4 r9
30 #define rH5 r10
31 #define rH6 r11
32 #define rH7 r12
34 #define rW0 r14 /* 64 bit registers. 16 words in 8 registers */
35 #define rW1 r15
36 #define rW2 r16
37 #define rW3 r17
38 #define rW4 r18
39 #define rW5 r19
40 #define rW6 r20
41 #define rW7 r21
43 #define rT0 r22 /* 64 bit temporaries */
44 #define rT1 r23
45 #define rT2 r0 /* 32 bit temporaries */
46 #define rT3 r25
48 #define CMP_KN_LOOP
49 #define CMP_KC_LOOP \
50 cmpwi rT1,0;
52 #define INITIALIZE \
53 stwu r1,-128(r1); /* create stack frame */ \
54 evstdw r14,8(r1); /* We must save non volatile */ \
55 evstdw r15,16(r1); /* registers. Take the chance */ \
56 evstdw r16,24(r1); /* and save the SPE part too */ \
57 evstdw r17,32(r1); \
58 evstdw r18,40(r1); \
59 evstdw r19,48(r1); \
60 evstdw r20,56(r1); \
61 evstdw r21,64(r1); \
62 evstdw r22,72(r1); \
63 evstdw r23,80(r1); \
64 stw r24,88(r1); /* save normal registers */ \
65 stw r25,92(r1);
68 #define FINALIZE \
69 evldw r14,8(r1); /* restore SPE registers */ \
70 evldw r15,16(r1); \
71 evldw r16,24(r1); \
72 evldw r17,32(r1); \
73 evldw r18,40(r1); \
74 evldw r19,48(r1); \
75 evldw r20,56(r1); \
76 evldw r21,64(r1); \
77 evldw r22,72(r1); \
78 evldw r23,80(r1); \
79 lwz r24,88(r1); /* restore normal registers */ \
80 lwz r25,92(r1); \
81 xor r0,r0,r0; \
82 stw r0,8(r1); /* Delete sensitive data */ \
83 stw r0,16(r1); /* that we might have pushed */ \
84 stw r0,24(r1); /* from other context that runs */ \
85 stw r0,32(r1); /* the same code. Assume that */ \
86 stw r0,40(r1); /* the lower part of the GPRs */ \
87 stw r0,48(r1); /* was already overwritten on */ \
88 stw r0,56(r1); /* the way down to here */ \
89 stw r0,64(r1); \
90 stw r0,72(r1); \
91 stw r0,80(r1); \
92 addi r1,r1,128; /* cleanup stack frame */
94 #ifdef __BIG_ENDIAN__
95 #define LOAD_DATA(reg, off) \
96 lwz reg,off(rWP); /* load data */
97 #define NEXT_BLOCK \
98 addi rWP,rWP,64; /* increment per block */
99 #else
100 #define LOAD_DATA(reg, off) \
101 lwbrx reg,0,rWP; /* load data */ \
102 addi rWP,rWP,4; /* increment per word */
103 #define NEXT_BLOCK /* nothing to do */
104 #endif
106 #define R_LOAD_W(a, b, c, d, e, f, g, h, w, off) \
107 LOAD_DATA(w, off) /* 1: W */ \
108 rotrwi rT0,e,6; /* 1: S1 = e rotr 6 */ \
109 rotrwi rT1,e,11; /* 1: S1' = e rotr 11 */ \
110 rotrwi rT2,e,25; /* 1: S1" = e rotr 25 */ \
111 xor rT0,rT0,rT1; /* 1: S1 = S1 xor S1' */ \
112 and rT3,e,f; /* 1: ch = e and f */ \
113 xor rT0,rT0,rT2; /* 1: S1 = S1 xor S1" */ \
114 andc rT1,g,e; /* 1: ch' = ~e and g */ \
115 lwz rT2,off(rKP); /* 1: K */ \
116 xor rT3,rT3,rT1; /* 1: ch = ch xor ch' */ \
117 add h,h,rT0; /* 1: temp1 = h + S1 */ \
118 add rT3,rT3,w; /* 1: temp1' = ch + w */ \
119 rotrwi rT0,a,2; /* 1: S0 = a rotr 2 */ \
120 add h,h,rT3; /* 1: temp1 = temp1 + temp1' */ \
121 rotrwi rT1,a,13; /* 1: S0' = a rotr 13 */ \
122 add h,h,rT2; /* 1: temp1 = temp1 + K */ \
123 rotrwi rT3,a,22; /* 1: S0" = a rotr 22 */ \
124 xor rT0,rT0,rT1; /* 1: S0 = S0 xor S0' */ \
125 add d,d,h; /* 1: d = d + temp1 */ \
126 xor rT3,rT0,rT3; /* 1: S0 = S0 xor S0" */ \
127 evmergelo w,w,w; /* shift W */ \
128 or rT2,a,b; /* 1: maj = a or b */ \
129 and rT1,a,b; /* 1: maj' = a and b */ \
130 and rT2,rT2,c; /* 1: maj = maj and c */ \
131 LOAD_DATA(w, off+4) /* 2: W */ \
132 or rT2,rT1,rT2; /* 1: maj = maj or maj' */ \
133 rotrwi rT0,d,6; /* 2: S1 = e rotr 6 */ \
134 add rT3,rT3,rT2; /* 1: temp2 = S0 + maj */ \
135 rotrwi rT1,d,11; /* 2: S1' = e rotr 11 */ \
136 add h,h,rT3; /* 1: h = temp1 + temp2 */ \
137 rotrwi rT2,d,25; /* 2: S1" = e rotr 25 */ \
138 xor rT0,rT0,rT1; /* 2: S1 = S1 xor S1' */ \
139 and rT3,d,e; /* 2: ch = e and f */ \
140 xor rT0,rT0,rT2; /* 2: S1 = S1 xor S1" */ \
141 andc rT1,f,d; /* 2: ch' = ~e and g */ \
142 lwz rT2,off+4(rKP); /* 2: K */ \
143 xor rT3,rT3,rT1; /* 2: ch = ch xor ch' */ \
144 add g,g,rT0; /* 2: temp1 = h + S1 */ \
145 add rT3,rT3,w; /* 2: temp1' = ch + w */ \
146 rotrwi rT0,h,2; /* 2: S0 = a rotr 2 */ \
147 add g,g,rT3; /* 2: temp1 = temp1 + temp1' */ \
148 rotrwi rT1,h,13; /* 2: S0' = a rotr 13 */ \
149 add g,g,rT2; /* 2: temp1 = temp1 + K */ \
150 rotrwi rT3,h,22; /* 2: S0" = a rotr 22 */ \
151 xor rT0,rT0,rT1; /* 2: S0 = S0 xor S0' */ \
152 or rT2,h,a; /* 2: maj = a or b */ \
153 xor rT3,rT0,rT3; /* 2: S0 = S0 xor S0" */ \
154 and rT1,h,a; /* 2: maj' = a and b */ \
155 and rT2,rT2,b; /* 2: maj = maj and c */ \
156 add c,c,g; /* 2: d = d + temp1 */ \
157 or rT2,rT1,rT2; /* 2: maj = maj or maj' */ \
158 add rT3,rT3,rT2; /* 2: temp2 = S0 + maj */ \
159 add g,g,rT3 /* 2: h = temp1 + temp2 */
161 #define R_CALC_W(a, b, c, d, e, f, g, h, w0, w1, w4, w5, w7, k, off) \
162 rotrwi rT2,e,6; /* 1: S1 = e rotr 6 */ \
163 evmergelohi rT0,w0,w1; /* w[-15] */ \
164 rotrwi rT3,e,11; /* 1: S1' = e rotr 11 */ \
165 evsrwiu rT1,rT0,3; /* s0 = w[-15] >> 3 */ \
166 xor rT2,rT2,rT3; /* 1: S1 = S1 xor S1' */ \
167 evrlwi rT0,rT0,25; /* s0' = w[-15] rotr 7 */ \
168 rotrwi rT3,e,25; /* 1: S1' = e rotr 25 */ \
169 evxor rT1,rT1,rT0; /* s0 = s0 xor s0' */ \
170 xor rT2,rT2,rT3; /* 1: S1 = S1 xor S1' */ \
171 evrlwi rT0,rT0,21; /* s0' = w[-15] rotr 18 */ \
172 add h,h,rT2; /* 1: temp1 = h + S1 */ \
173 evxor rT0,rT0,rT1; /* s0 = s0 xor s0' */ \
174 and rT2,e,f; /* 1: ch = e and f */ \
175 evaddw w0,w0,rT0; /* w = w[-16] + s0 */ \
176 andc rT3,g,e; /* 1: ch' = ~e and g */ \
177 evsrwiu rT0,w7,10; /* s1 = w[-2] >> 10 */ \
178 xor rT2,rT2,rT3; /* 1: ch = ch xor ch' */ \
179 evrlwi rT1,w7,15; /* s1' = w[-2] rotr 17 */ \
180 add h,h,rT2; /* 1: temp1 = temp1 + ch */ \
181 evxor rT0,rT0,rT1; /* s1 = s1 xor s1' */ \
182 rotrwi rT2,a,2; /* 1: S0 = a rotr 2 */ \
183 evrlwi rT1,w7,13; /* s1' = w[-2] rotr 19 */ \
184 rotrwi rT3,a,13; /* 1: S0' = a rotr 13 */ \
185 evxor rT0,rT0,rT1; /* s1 = s1 xor s1' */ \
186 xor rT2,rT2,rT3; /* 1: S0 = S0 xor S0' */ \
187 evldw rT1,off(rKP); /* k */ \
188 rotrwi rT3,a,22; /* 1: S0' = a rotr 22 */ \
189 evaddw w0,w0,rT0; /* w = w + s1 */ \
190 xor rT2,rT2,rT3; /* 1: S0 = S0 xor S0' */ \
191 evmergelohi rT0,w4,w5; /* w[-7] */ \
192 and rT3,a,b; /* 1: maj = a and b */ \
193 evaddw w0,w0,rT0; /* w = w + w[-7] */ \
194 CMP_K##k##_LOOP \
195 add rT2,rT2,rT3; /* 1: temp2 = S0 + maj */ \
196 evaddw rT1,rT1,w0; /* wk = w + k */ \
197 xor rT3,a,b; /* 1: maj = a xor b */ \
198 evmergehi rT0,rT1,rT1; /* wk1/wk2 */ \
199 and rT3,rT3,c; /* 1: maj = maj and c */ \
200 add h,h,rT0; /* 1: temp1 = temp1 + wk */ \
201 add rT2,rT2,rT3; /* 1: temp2 = temp2 + maj */ \
202 add g,g,rT1; /* 2: temp1 = temp1 + wk */ \
203 add d,d,h; /* 1: d = d + temp1 */ \
204 rotrwi rT0,d,6; /* 2: S1 = e rotr 6 */ \
205 add h,h,rT2; /* 1: h = temp1 + temp2 */ \
206 rotrwi rT1,d,11; /* 2: S1' = e rotr 11 */ \
207 rotrwi rT2,d,25; /* 2: S" = e rotr 25 */ \
208 xor rT0,rT0,rT1; /* 2: S1 = S1 xor S1' */ \
209 and rT3,d,e; /* 2: ch = e and f */ \
210 xor rT0,rT0,rT2; /* 2: S1 = S1 xor S1" */ \
211 andc rT1,f,d; /* 2: ch' = ~e and g */ \
212 add g,g,rT0; /* 2: temp1 = h + S1 */ \
213 xor rT3,rT3,rT1; /* 2: ch = ch xor ch' */ \
214 rotrwi rT0,h,2; /* 2: S0 = a rotr 2 */ \
215 add g,g,rT3; /* 2: temp1 = temp1 + ch */ \
216 rotrwi rT1,h,13; /* 2: S0' = a rotr 13 */ \
217 rotrwi rT3,h,22; /* 2: S0" = a rotr 22 */ \
218 xor rT0,rT0,rT1; /* 2: S0 = S0 xor S0' */ \
219 or rT2,h,a; /* 2: maj = a or b */ \
220 and rT1,h,a; /* 2: maj' = a and b */ \
221 and rT2,rT2,b; /* 2: maj = maj and c */ \
222 xor rT3,rT0,rT3; /* 2: S0 = S0 xor S0" */ \
223 or rT2,rT1,rT2; /* 2: maj = maj or maj' */ \
224 add c,c,g; /* 2: d = d + temp1 */ \
225 add rT3,rT3,rT2; /* 2: temp2 = S0 + maj */ \
226 add g,g,rT3 /* 2: h = temp1 + temp2 */
228 _GLOBAL(ppc_spe_sha256_transform)
229 INITIALIZE
231 mtctr r5
232 lwz rH0,0(rHP)
233 lwz rH1,4(rHP)
234 lwz rH2,8(rHP)
235 lwz rH3,12(rHP)
236 lwz rH4,16(rHP)
237 lwz rH5,20(rHP)
238 lwz rH6,24(rHP)
239 lwz rH7,28(rHP)
241 ppc_spe_sha256_main:
242 lis rKP,PPC_SPE_SHA256_K@ha
243 addi rKP,rKP,PPC_SPE_SHA256_K@l
245 R_LOAD_W(rH0, rH1, rH2, rH3, rH4, rH5, rH6, rH7, rW0, 0)
246 R_LOAD_W(rH6, rH7, rH0, rH1, rH2, rH3, rH4, rH5, rW1, 8)
247 R_LOAD_W(rH4, rH5, rH6, rH7, rH0, rH1, rH2, rH3, rW2, 16)
248 R_LOAD_W(rH2, rH3, rH4, rH5, rH6, rH7, rH0, rH1, rW3, 24)
249 R_LOAD_W(rH0, rH1, rH2, rH3, rH4, rH5, rH6, rH7, rW4, 32)
250 R_LOAD_W(rH6, rH7, rH0, rH1, rH2, rH3, rH4, rH5, rW5, 40)
251 R_LOAD_W(rH4, rH5, rH6, rH7, rH0, rH1, rH2, rH3, rW6, 48)
252 R_LOAD_W(rH2, rH3, rH4, rH5, rH6, rH7, rH0, rH1, rW7, 56)
253 ppc_spe_sha256_16_rounds:
254 addi rKP,rKP,64
255 R_CALC_W(rH0, rH1, rH2, rH3, rH4, rH5, rH6, rH7,
256 rW0, rW1, rW4, rW5, rW7, N, 0)
257 R_CALC_W(rH6, rH7, rH0, rH1, rH2, rH3, rH4, rH5,
258 rW1, rW2, rW5, rW6, rW0, N, 8)
259 R_CALC_W(rH4, rH5, rH6, rH7, rH0, rH1, rH2, rH3,
260 rW2, rW3, rW6, rW7, rW1, N, 16)
261 R_CALC_W(rH2, rH3, rH4, rH5, rH6, rH7, rH0, rH1,
262 rW3, rW4, rW7, rW0, rW2, N, 24)
263 R_CALC_W(rH0, rH1, rH2, rH3, rH4, rH5, rH6, rH7,
264 rW4, rW5, rW0, rW1, rW3, N, 32)
265 R_CALC_W(rH6, rH7, rH0, rH1, rH2, rH3, rH4, rH5,
266 rW5, rW6, rW1, rW2, rW4, N, 40)
267 R_CALC_W(rH4, rH5, rH6, rH7, rH0, rH1, rH2, rH3,
268 rW6, rW7, rW2, rW3, rW5, N, 48)
269 R_CALC_W(rH2, rH3, rH4, rH5, rH6, rH7, rH0, rH1,
270 rW7, rW0, rW3, rW4, rW6, C, 56)
271 bt gt,ppc_spe_sha256_16_rounds
273 lwz rW0,0(rHP)
274 NEXT_BLOCK
275 lwz rW1,4(rHP)
276 lwz rW2,8(rHP)
277 lwz rW3,12(rHP)
278 lwz rW4,16(rHP)
279 lwz rW5,20(rHP)
280 lwz rW6,24(rHP)
281 lwz rW7,28(rHP)
283 add rH0,rH0,rW0
284 stw rH0,0(rHP)
285 add rH1,rH1,rW1
286 stw rH1,4(rHP)
287 add rH2,rH2,rW2
288 stw rH2,8(rHP)
289 add rH3,rH3,rW3
290 stw rH3,12(rHP)
291 add rH4,rH4,rW4
292 stw rH4,16(rHP)
293 add rH5,rH5,rW5
294 stw rH5,20(rHP)
295 add rH6,rH6,rW6
296 stw rH6,24(rHP)
297 add rH7,rH7,rW7
298 stw rH7,28(rHP)
300 bdnz ppc_spe_sha256_main
302 FINALIZE
303 blr
305 .data
306 .align 5
307 PPC_SPE_SHA256_K:
308 .long 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
309 .long 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
310 .long 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
311 .long 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
312 .long 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
313 .long 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
314 .long 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
315 .long 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
316 .long 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
317 .long 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
318 .long 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
319 .long 0xd192e819,0xd6990624,0xf40e3585,0x106aa070
320 .long 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
321 .long 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
322 .long 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
323 .long 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2