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b1ccc8f4 MW |
1 | /* |
2 | * Poly1305 authenticator algorithm, RFC7539, x64 AVX2 functions | |
3 | * | |
4 | * Copyright (C) 2015 Martin Willi | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/linkage.h> | |
13 | ||
14 | .data | |
15 | .align 32 | |
16 | ||
17 | ANMASK: .octa 0x0000000003ffffff0000000003ffffff | |
18 | .octa 0x0000000003ffffff0000000003ffffff | |
19 | ORMASK: .octa 0x00000000010000000000000001000000 | |
20 | .octa 0x00000000010000000000000001000000 | |
21 | ||
22 | .text | |
23 | ||
24 | #define h0 0x00(%rdi) | |
25 | #define h1 0x04(%rdi) | |
26 | #define h2 0x08(%rdi) | |
27 | #define h3 0x0c(%rdi) | |
28 | #define h4 0x10(%rdi) | |
29 | #define r0 0x00(%rdx) | |
30 | #define r1 0x04(%rdx) | |
31 | #define r2 0x08(%rdx) | |
32 | #define r3 0x0c(%rdx) | |
33 | #define r4 0x10(%rdx) | |
34 | #define u0 0x00(%r8) | |
35 | #define u1 0x04(%r8) | |
36 | #define u2 0x08(%r8) | |
37 | #define u3 0x0c(%r8) | |
38 | #define u4 0x10(%r8) | |
39 | #define w0 0x14(%r8) | |
40 | #define w1 0x18(%r8) | |
41 | #define w2 0x1c(%r8) | |
42 | #define w3 0x20(%r8) | |
43 | #define w4 0x24(%r8) | |
44 | #define y0 0x28(%r8) | |
45 | #define y1 0x2c(%r8) | |
46 | #define y2 0x30(%r8) | |
47 | #define y3 0x34(%r8) | |
48 | #define y4 0x38(%r8) | |
49 | #define m %rsi | |
50 | #define hc0 %ymm0 | |
51 | #define hc1 %ymm1 | |
52 | #define hc2 %ymm2 | |
53 | #define hc3 %ymm3 | |
54 | #define hc4 %ymm4 | |
55 | #define hc0x %xmm0 | |
56 | #define hc1x %xmm1 | |
57 | #define hc2x %xmm2 | |
58 | #define hc3x %xmm3 | |
59 | #define hc4x %xmm4 | |
60 | #define t1 %ymm5 | |
61 | #define t2 %ymm6 | |
62 | #define t1x %xmm5 | |
63 | #define t2x %xmm6 | |
64 | #define ruwy0 %ymm7 | |
65 | #define ruwy1 %ymm8 | |
66 | #define ruwy2 %ymm9 | |
67 | #define ruwy3 %ymm10 | |
68 | #define ruwy4 %ymm11 | |
69 | #define ruwy0x %xmm7 | |
70 | #define ruwy1x %xmm8 | |
71 | #define ruwy2x %xmm9 | |
72 | #define ruwy3x %xmm10 | |
73 | #define ruwy4x %xmm11 | |
74 | #define svxz1 %ymm12 | |
75 | #define svxz2 %ymm13 | |
76 | #define svxz3 %ymm14 | |
77 | #define svxz4 %ymm15 | |
78 | #define d0 %r9 | |
79 | #define d1 %r10 | |
80 | #define d2 %r11 | |
81 | #define d3 %r12 | |
82 | #define d4 %r13 | |
83 | ||
84 | ENTRY(poly1305_4block_avx2) | |
85 | # %rdi: Accumulator h[5] | |
86 | # %rsi: 64 byte input block m | |
87 | # %rdx: Poly1305 key r[5] | |
88 | # %rcx: Quadblock count | |
89 | # %r8: Poly1305 derived key r^2 u[5], r^3 w[5], r^4 y[5], | |
90 | ||
91 | # This four-block variant uses loop unrolled block processing. It | |
92 | # requires 4 Poly1305 keys: r, r^2, r^3 and r^4: | |
93 | # h = (h + m) * r => h = (h + m1) * r^4 + m2 * r^3 + m3 * r^2 + m4 * r | |
94 | ||
95 | vzeroupper | |
96 | push %rbx | |
97 | push %r12 | |
98 | push %r13 | |
99 | ||
100 | # combine r0,u0,w0,y0 | |
101 | vmovd y0,ruwy0x | |
102 | vmovd w0,t1x | |
103 | vpunpcklqdq t1,ruwy0,ruwy0 | |
104 | vmovd u0,t1x | |
105 | vmovd r0,t2x | |
106 | vpunpcklqdq t2,t1,t1 | |
107 | vperm2i128 $0x20,t1,ruwy0,ruwy0 | |
108 | ||
109 | # combine r1,u1,w1,y1 and s1=r1*5,v1=u1*5,x1=w1*5,z1=y1*5 | |
110 | vmovd y1,ruwy1x | |
111 | vmovd w1,t1x | |
112 | vpunpcklqdq t1,ruwy1,ruwy1 | |
113 | vmovd u1,t1x | |
114 | vmovd r1,t2x | |
115 | vpunpcklqdq t2,t1,t1 | |
116 | vperm2i128 $0x20,t1,ruwy1,ruwy1 | |
117 | vpslld $2,ruwy1,svxz1 | |
118 | vpaddd ruwy1,svxz1,svxz1 | |
119 | ||
120 | # combine r2,u2,w2,y2 and s2=r2*5,v2=u2*5,x2=w2*5,z2=y2*5 | |
121 | vmovd y2,ruwy2x | |
122 | vmovd w2,t1x | |
123 | vpunpcklqdq t1,ruwy2,ruwy2 | |
124 | vmovd u2,t1x | |
125 | vmovd r2,t2x | |
126 | vpunpcklqdq t2,t1,t1 | |
127 | vperm2i128 $0x20,t1,ruwy2,ruwy2 | |
128 | vpslld $2,ruwy2,svxz2 | |
129 | vpaddd ruwy2,svxz2,svxz2 | |
130 | ||
131 | # combine r3,u3,w3,y3 and s3=r3*5,v3=u3*5,x3=w3*5,z3=y3*5 | |
132 | vmovd y3,ruwy3x | |
133 | vmovd w3,t1x | |
134 | vpunpcklqdq t1,ruwy3,ruwy3 | |
135 | vmovd u3,t1x | |
136 | vmovd r3,t2x | |
137 | vpunpcklqdq t2,t1,t1 | |
138 | vperm2i128 $0x20,t1,ruwy3,ruwy3 | |
139 | vpslld $2,ruwy3,svxz3 | |
140 | vpaddd ruwy3,svxz3,svxz3 | |
141 | ||
142 | # combine r4,u4,w4,y4 and s4=r4*5,v4=u4*5,x4=w4*5,z4=y4*5 | |
143 | vmovd y4,ruwy4x | |
144 | vmovd w4,t1x | |
145 | vpunpcklqdq t1,ruwy4,ruwy4 | |
146 | vmovd u4,t1x | |
147 | vmovd r4,t2x | |
148 | vpunpcklqdq t2,t1,t1 | |
149 | vperm2i128 $0x20,t1,ruwy4,ruwy4 | |
150 | vpslld $2,ruwy4,svxz4 | |
151 | vpaddd ruwy4,svxz4,svxz4 | |
152 | ||
153 | .Ldoblock4: | |
154 | # hc0 = [m[48-51] & 0x3ffffff, m[32-35] & 0x3ffffff, | |
155 | # m[16-19] & 0x3ffffff, m[ 0- 3] & 0x3ffffff + h0] | |
156 | vmovd 0x00(m),hc0x | |
157 | vmovd 0x10(m),t1x | |
158 | vpunpcklqdq t1,hc0,hc0 | |
159 | vmovd 0x20(m),t1x | |
160 | vmovd 0x30(m),t2x | |
161 | vpunpcklqdq t2,t1,t1 | |
162 | vperm2i128 $0x20,t1,hc0,hc0 | |
163 | vpand ANMASK(%rip),hc0,hc0 | |
164 | vmovd h0,t1x | |
165 | vpaddd t1,hc0,hc0 | |
166 | # hc1 = [(m[51-54] >> 2) & 0x3ffffff, (m[35-38] >> 2) & 0x3ffffff, | |
167 | # (m[19-22] >> 2) & 0x3ffffff, (m[ 3- 6] >> 2) & 0x3ffffff + h1] | |
168 | vmovd 0x03(m),hc1x | |
169 | vmovd 0x13(m),t1x | |
170 | vpunpcklqdq t1,hc1,hc1 | |
171 | vmovd 0x23(m),t1x | |
172 | vmovd 0x33(m),t2x | |
173 | vpunpcklqdq t2,t1,t1 | |
174 | vperm2i128 $0x20,t1,hc1,hc1 | |
175 | vpsrld $2,hc1,hc1 | |
176 | vpand ANMASK(%rip),hc1,hc1 | |
177 | vmovd h1,t1x | |
178 | vpaddd t1,hc1,hc1 | |
179 | # hc2 = [(m[54-57] >> 4) & 0x3ffffff, (m[38-41] >> 4) & 0x3ffffff, | |
180 | # (m[22-25] >> 4) & 0x3ffffff, (m[ 6- 9] >> 4) & 0x3ffffff + h2] | |
181 | vmovd 0x06(m),hc2x | |
182 | vmovd 0x16(m),t1x | |
183 | vpunpcklqdq t1,hc2,hc2 | |
184 | vmovd 0x26(m),t1x | |
185 | vmovd 0x36(m),t2x | |
186 | vpunpcklqdq t2,t1,t1 | |
187 | vperm2i128 $0x20,t1,hc2,hc2 | |
188 | vpsrld $4,hc2,hc2 | |
189 | vpand ANMASK(%rip),hc2,hc2 | |
190 | vmovd h2,t1x | |
191 | vpaddd t1,hc2,hc2 | |
192 | # hc3 = [(m[57-60] >> 6) & 0x3ffffff, (m[41-44] >> 6) & 0x3ffffff, | |
193 | # (m[25-28] >> 6) & 0x3ffffff, (m[ 9-12] >> 6) & 0x3ffffff + h3] | |
194 | vmovd 0x09(m),hc3x | |
195 | vmovd 0x19(m),t1x | |
196 | vpunpcklqdq t1,hc3,hc3 | |
197 | vmovd 0x29(m),t1x | |
198 | vmovd 0x39(m),t2x | |
199 | vpunpcklqdq t2,t1,t1 | |
200 | vperm2i128 $0x20,t1,hc3,hc3 | |
201 | vpsrld $6,hc3,hc3 | |
202 | vpand ANMASK(%rip),hc3,hc3 | |
203 | vmovd h3,t1x | |
204 | vpaddd t1,hc3,hc3 | |
205 | # hc4 = [(m[60-63] >> 8) | (1<<24), (m[44-47] >> 8) | (1<<24), | |
206 | # (m[28-31] >> 8) | (1<<24), (m[12-15] >> 8) | (1<<24) + h4] | |
207 | vmovd 0x0c(m),hc4x | |
208 | vmovd 0x1c(m),t1x | |
209 | vpunpcklqdq t1,hc4,hc4 | |
210 | vmovd 0x2c(m),t1x | |
211 | vmovd 0x3c(m),t2x | |
212 | vpunpcklqdq t2,t1,t1 | |
213 | vperm2i128 $0x20,t1,hc4,hc4 | |
214 | vpsrld $8,hc4,hc4 | |
215 | vpor ORMASK(%rip),hc4,hc4 | |
216 | vmovd h4,t1x | |
217 | vpaddd t1,hc4,hc4 | |
218 | ||
219 | # t1 = [ hc0[3] * r0, hc0[2] * u0, hc0[1] * w0, hc0[0] * y0 ] | |
220 | vpmuludq hc0,ruwy0,t1 | |
221 | # t1 += [ hc1[3] * s4, hc1[2] * v4, hc1[1] * x4, hc1[0] * z4 ] | |
222 | vpmuludq hc1,svxz4,t2 | |
223 | vpaddq t2,t1,t1 | |
224 | # t1 += [ hc2[3] * s3, hc2[2] * v3, hc2[1] * x3, hc2[0] * z3 ] | |
225 | vpmuludq hc2,svxz3,t2 | |
226 | vpaddq t2,t1,t1 | |
227 | # t1 += [ hc3[3] * s2, hc3[2] * v2, hc3[1] * x2, hc3[0] * z2 ] | |
228 | vpmuludq hc3,svxz2,t2 | |
229 | vpaddq t2,t1,t1 | |
230 | # t1 += [ hc4[3] * s1, hc4[2] * v1, hc4[1] * x1, hc4[0] * z1 ] | |
231 | vpmuludq hc4,svxz1,t2 | |
232 | vpaddq t2,t1,t1 | |
233 | # d0 = t1[0] + t1[1] + t[2] + t[3] | |
234 | vpermq $0xee,t1,t2 | |
235 | vpaddq t2,t1,t1 | |
236 | vpsrldq $8,t1,t2 | |
237 | vpaddq t2,t1,t1 | |
238 | vmovq t1x,d0 | |
239 | ||
240 | # t1 = [ hc0[3] * r1, hc0[2] * u1,hc0[1] * w1, hc0[0] * y1 ] | |
241 | vpmuludq hc0,ruwy1,t1 | |
242 | # t1 += [ hc1[3] * r0, hc1[2] * u0, hc1[1] * w0, hc1[0] * y0 ] | |
243 | vpmuludq hc1,ruwy0,t2 | |
244 | vpaddq t2,t1,t1 | |
245 | # t1 += [ hc2[3] * s4, hc2[2] * v4, hc2[1] * x4, hc2[0] * z4 ] | |
246 | vpmuludq hc2,svxz4,t2 | |
247 | vpaddq t2,t1,t1 | |
248 | # t1 += [ hc3[3] * s3, hc3[2] * v3, hc3[1] * x3, hc3[0] * z3 ] | |
249 | vpmuludq hc3,svxz3,t2 | |
250 | vpaddq t2,t1,t1 | |
251 | # t1 += [ hc4[3] * s2, hc4[2] * v2, hc4[1] * x2, hc4[0] * z2 ] | |
252 | vpmuludq hc4,svxz2,t2 | |
253 | vpaddq t2,t1,t1 | |
254 | # d1 = t1[0] + t1[1] + t1[3] + t1[4] | |
255 | vpermq $0xee,t1,t2 | |
256 | vpaddq t2,t1,t1 | |
257 | vpsrldq $8,t1,t2 | |
258 | vpaddq t2,t1,t1 | |
259 | vmovq t1x,d1 | |
260 | ||
261 | # t1 = [ hc0[3] * r2, hc0[2] * u2, hc0[1] * w2, hc0[0] * y2 ] | |
262 | vpmuludq hc0,ruwy2,t1 | |
263 | # t1 += [ hc1[3] * r1, hc1[2] * u1, hc1[1] * w1, hc1[0] * y1 ] | |
264 | vpmuludq hc1,ruwy1,t2 | |
265 | vpaddq t2,t1,t1 | |
266 | # t1 += [ hc2[3] * r0, hc2[2] * u0, hc2[1] * w0, hc2[0] * y0 ] | |
267 | vpmuludq hc2,ruwy0,t2 | |
268 | vpaddq t2,t1,t1 | |
269 | # t1 += [ hc3[3] * s4, hc3[2] * v4, hc3[1] * x4, hc3[0] * z4 ] | |
270 | vpmuludq hc3,svxz4,t2 | |
271 | vpaddq t2,t1,t1 | |
272 | # t1 += [ hc4[3] * s3, hc4[2] * v3, hc4[1] * x3, hc4[0] * z3 ] | |
273 | vpmuludq hc4,svxz3,t2 | |
274 | vpaddq t2,t1,t1 | |
275 | # d2 = t1[0] + t1[1] + t1[2] + t1[3] | |
276 | vpermq $0xee,t1,t2 | |
277 | vpaddq t2,t1,t1 | |
278 | vpsrldq $8,t1,t2 | |
279 | vpaddq t2,t1,t1 | |
280 | vmovq t1x,d2 | |
281 | ||
282 | # t1 = [ hc0[3] * r3, hc0[2] * u3, hc0[1] * w3, hc0[0] * y3 ] | |
283 | vpmuludq hc0,ruwy3,t1 | |
284 | # t1 += [ hc1[3] * r2, hc1[2] * u2, hc1[1] * w2, hc1[0] * y2 ] | |
285 | vpmuludq hc1,ruwy2,t2 | |
286 | vpaddq t2,t1,t1 | |
287 | # t1 += [ hc2[3] * r1, hc2[2] * u1, hc2[1] * w1, hc2[0] * y1 ] | |
288 | vpmuludq hc2,ruwy1,t2 | |
289 | vpaddq t2,t1,t1 | |
290 | # t1 += [ hc3[3] * r0, hc3[2] * u0, hc3[1] * w0, hc3[0] * y0 ] | |
291 | vpmuludq hc3,ruwy0,t2 | |
292 | vpaddq t2,t1,t1 | |
293 | # t1 += [ hc4[3] * s4, hc4[2] * v4, hc4[1] * x4, hc4[0] * z4 ] | |
294 | vpmuludq hc4,svxz4,t2 | |
295 | vpaddq t2,t1,t1 | |
296 | # d3 = t1[0] + t1[1] + t1[2] + t1[3] | |
297 | vpermq $0xee,t1,t2 | |
298 | vpaddq t2,t1,t1 | |
299 | vpsrldq $8,t1,t2 | |
300 | vpaddq t2,t1,t1 | |
301 | vmovq t1x,d3 | |
302 | ||
303 | # t1 = [ hc0[3] * r4, hc0[2] * u4, hc0[1] * w4, hc0[0] * y4 ] | |
304 | vpmuludq hc0,ruwy4,t1 | |
305 | # t1 += [ hc1[3] * r3, hc1[2] * u3, hc1[1] * w3, hc1[0] * y3 ] | |
306 | vpmuludq hc1,ruwy3,t2 | |
307 | vpaddq t2,t1,t1 | |
308 | # t1 += [ hc2[3] * r2, hc2[2] * u2, hc2[1] * w2, hc2[0] * y2 ] | |
309 | vpmuludq hc2,ruwy2,t2 | |
310 | vpaddq t2,t1,t1 | |
311 | # t1 += [ hc3[3] * r1, hc3[2] * u1, hc3[1] * w1, hc3[0] * y1 ] | |
312 | vpmuludq hc3,ruwy1,t2 | |
313 | vpaddq t2,t1,t1 | |
314 | # t1 += [ hc4[3] * r0, hc4[2] * u0, hc4[1] * w0, hc4[0] * y0 ] | |
315 | vpmuludq hc4,ruwy0,t2 | |
316 | vpaddq t2,t1,t1 | |
317 | # d4 = t1[0] + t1[1] + t1[2] + t1[3] | |
318 | vpermq $0xee,t1,t2 | |
319 | vpaddq t2,t1,t1 | |
320 | vpsrldq $8,t1,t2 | |
321 | vpaddq t2,t1,t1 | |
322 | vmovq t1x,d4 | |
323 | ||
324 | # d1 += d0 >> 26 | |
325 | mov d0,%rax | |
326 | shr $26,%rax | |
327 | add %rax,d1 | |
328 | # h0 = d0 & 0x3ffffff | |
329 | mov d0,%rbx | |
330 | and $0x3ffffff,%ebx | |
331 | ||
332 | # d2 += d1 >> 26 | |
333 | mov d1,%rax | |
334 | shr $26,%rax | |
335 | add %rax,d2 | |
336 | # h1 = d1 & 0x3ffffff | |
337 | mov d1,%rax | |
338 | and $0x3ffffff,%eax | |
339 | mov %eax,h1 | |
340 | ||
341 | # d3 += d2 >> 26 | |
342 | mov d2,%rax | |
343 | shr $26,%rax | |
344 | add %rax,d3 | |
345 | # h2 = d2 & 0x3ffffff | |
346 | mov d2,%rax | |
347 | and $0x3ffffff,%eax | |
348 | mov %eax,h2 | |
349 | ||
350 | # d4 += d3 >> 26 | |
351 | mov d3,%rax | |
352 | shr $26,%rax | |
353 | add %rax,d4 | |
354 | # h3 = d3 & 0x3ffffff | |
355 | mov d3,%rax | |
356 | and $0x3ffffff,%eax | |
357 | mov %eax,h3 | |
358 | ||
359 | # h0 += (d4 >> 26) * 5 | |
360 | mov d4,%rax | |
361 | shr $26,%rax | |
362 | lea (%eax,%eax,4),%eax | |
363 | add %eax,%ebx | |
364 | # h4 = d4 & 0x3ffffff | |
365 | mov d4,%rax | |
366 | and $0x3ffffff,%eax | |
367 | mov %eax,h4 | |
368 | ||
369 | # h1 += h0 >> 26 | |
370 | mov %ebx,%eax | |
371 | shr $26,%eax | |
372 | add %eax,h1 | |
373 | # h0 = h0 & 0x3ffffff | |
374 | andl $0x3ffffff,%ebx | |
375 | mov %ebx,h0 | |
376 | ||
377 | add $0x40,m | |
378 | dec %rcx | |
379 | jnz .Ldoblock4 | |
380 | ||
381 | vzeroupper | |
382 | pop %r13 | |
383 | pop %r12 | |
384 | pop %rbx | |
385 | ret | |
386 | ENDPROC(poly1305_4block_avx2) |