| blob | 8457cdd47f751167a2321ebf063eb18bdb4ef8aa |
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 */
12 #include <linux/linkage.h>
14 .section .rodata.cst32.ANMASK, "aM", @progbits, 32
15 .align 32
16 ANMASK: .octa 0x0000000003ffffff0000000003ffffff
17 .octa 0x0000000003ffffff0000000003ffffff
19 .section .rodata.cst32.ORMASK, "aM", @progbits, 32
20 .align 32
21 ORMASK: .octa 0x00000000010000000000000001000000
22 .octa 0x00000000010000000000000001000000
24 .text
26 #define h0 0x00(%rdi)
27 #define h1 0x04(%rdi)
28 #define h2 0x08(%rdi)
29 #define h3 0x0c(%rdi)
30 #define h4 0x10(%rdi)
31 #define r0 0x00(%rdx)
32 #define r1 0x04(%rdx)
33 #define r2 0x08(%rdx)
34 #define r3 0x0c(%rdx)
35 #define r4 0x10(%rdx)
36 #define u0 0x00(%r8)
37 #define u1 0x04(%r8)
38 #define u2 0x08(%r8)
39 #define u3 0x0c(%r8)
40 #define u4 0x10(%r8)
41 #define w0 0x14(%r8)
42 #define w1 0x18(%r8)
43 #define w2 0x1c(%r8)
44 #define w3 0x20(%r8)
45 #define w4 0x24(%r8)
46 #define y0 0x28(%r8)
47 #define y1 0x2c(%r8)
48 #define y2 0x30(%r8)
49 #define y3 0x34(%r8)
50 #define y4 0x38(%r8)
51 #define m %rsi
52 #define hc0 %ymm0
53 #define hc1 %ymm1
54 #define hc2 %ymm2
55 #define hc3 %ymm3
56 #define hc4 %ymm4
57 #define hc0x %xmm0
58 #define hc1x %xmm1
59 #define hc2x %xmm2
60 #define hc3x %xmm3
61 #define hc4x %xmm4
62 #define t1 %ymm5
63 #define t2 %ymm6
64 #define t1x %xmm5
65 #define t2x %xmm6
66 #define ruwy0 %ymm7
67 #define ruwy1 %ymm8
68 #define ruwy2 %ymm9
69 #define ruwy3 %ymm10
70 #define ruwy4 %ymm11
71 #define ruwy0x %xmm7
72 #define ruwy1x %xmm8
73 #define ruwy2x %xmm9
74 #define ruwy3x %xmm10
75 #define ruwy4x %xmm11
76 #define svxz1 %ymm12
77 #define svxz2 %ymm13
78 #define svxz3 %ymm14
79 #define svxz4 %ymm15
80 #define d0 %r9
81 #define d1 %r10
82 #define d2 %r11
83 #define d3 %r12
84 #define d4 %r13
86 ENTRY(poly1305_4block_avx2)
87 # %rdi: Accumulator h[5]
88 # %rsi: 64 byte input block m
89 # %rdx: Poly1305 key r[5]
90 # %rcx: Quadblock count
91 # %r8: Poly1305 derived key r^2 u[5], r^3 w[5], r^4 y[5],
93 # This four-block variant uses loop unrolled block processing. It
94 # requires 4 Poly1305 keys: r, r^2, r^3 and r^4:
95 # h = (h + m) * r => h = (h + m1) * r^4 + m2 * r^3 + m3 * r^2 + m4 * r
97 vzeroupper
98 push %rbx
99 push %r12
100 push %r13
102 # combine r0,u0,w0,y0
103 vmovd y0,ruwy0x
104 vmovd w0,t1x
105 vpunpcklqdq t1,ruwy0,ruwy0
106 vmovd u0,t1x
107 vmovd r0,t2x
108 vpunpcklqdq t2,t1,t1
109 vperm2i128 $0x20,t1,ruwy0,ruwy0
111 # combine r1,u1,w1,y1 and s1=r1*5,v1=u1*5,x1=w1*5,z1=y1*5
112 vmovd y1,ruwy1x
113 vmovd w1,t1x
114 vpunpcklqdq t1,ruwy1,ruwy1
115 vmovd u1,t1x
116 vmovd r1,t2x
117 vpunpcklqdq t2,t1,t1
118 vperm2i128 $0x20,t1,ruwy1,ruwy1
119 vpslld $2,ruwy1,svxz1
120 vpaddd ruwy1,svxz1,svxz1
122 # combine r2,u2,w2,y2 and s2=r2*5,v2=u2*5,x2=w2*5,z2=y2*5
123 vmovd y2,ruwy2x
124 vmovd w2,t1x
125 vpunpcklqdq t1,ruwy2,ruwy2
126 vmovd u2,t1x
127 vmovd r2,t2x
128 vpunpcklqdq t2,t1,t1
129 vperm2i128 $0x20,t1,ruwy2,ruwy2
130 vpslld $2,ruwy2,svxz2
131 vpaddd ruwy2,svxz2,svxz2
133 # combine r3,u3,w3,y3 and s3=r3*5,v3=u3*5,x3=w3*5,z3=y3*5
134 vmovd y3,ruwy3x
135 vmovd w3,t1x
136 vpunpcklqdq t1,ruwy3,ruwy3
137 vmovd u3,t1x
138 vmovd r3,t2x
139 vpunpcklqdq t2,t1,t1
140 vperm2i128 $0x20,t1,ruwy3,ruwy3
141 vpslld $2,ruwy3,svxz3
142 vpaddd ruwy3,svxz3,svxz3
144 # combine r4,u4,w4,y4 and s4=r4*5,v4=u4*5,x4=w4*5,z4=y4*5
145 vmovd y4,ruwy4x
146 vmovd w4,t1x
147 vpunpcklqdq t1,ruwy4,ruwy4
148 vmovd u4,t1x
149 vmovd r4,t2x
150 vpunpcklqdq t2,t1,t1
151 vperm2i128 $0x20,t1,ruwy4,ruwy4
152 vpslld $2,ruwy4,svxz4
153 vpaddd ruwy4,svxz4,svxz4
155 .Ldoblock4:
156 # hc0 = [m[48-51] & 0x3ffffff, m[32-35] & 0x3ffffff,
157 # m[16-19] & 0x3ffffff, m[ 0- 3] & 0x3ffffff + h0]
158 vmovd 0x00(m),hc0x
159 vmovd 0x10(m),t1x
160 vpunpcklqdq t1,hc0,hc0
161 vmovd 0x20(m),t1x
162 vmovd 0x30(m),t2x
163 vpunpcklqdq t2,t1,t1
164 vperm2i128 $0x20,t1,hc0,hc0
165 vpand ANMASK(%rip),hc0,hc0
166 vmovd h0,t1x
167 vpaddd t1,hc0,hc0
168 # hc1 = [(m[51-54] >> 2) & 0x3ffffff, (m[35-38] >> 2) & 0x3ffffff,
169 # (m[19-22] >> 2) & 0x3ffffff, (m[ 3- 6] >> 2) & 0x3ffffff + h1]
170 vmovd 0x03(m),hc1x
171 vmovd 0x13(m),t1x
172 vpunpcklqdq t1,hc1,hc1
173 vmovd 0x23(m),t1x
174 vmovd 0x33(m),t2x
175 vpunpcklqdq t2,t1,t1
176 vperm2i128 $0x20,t1,hc1,hc1
177 vpsrld $2,hc1,hc1
178 vpand ANMASK(%rip),hc1,hc1
179 vmovd h1,t1x
180 vpaddd t1,hc1,hc1
181 # hc2 = [(m[54-57] >> 4) & 0x3ffffff, (m[38-41] >> 4) & 0x3ffffff,
182 # (m[22-25] >> 4) & 0x3ffffff, (m[ 6- 9] >> 4) & 0x3ffffff + h2]
183 vmovd 0x06(m),hc2x
184 vmovd 0x16(m),t1x
185 vpunpcklqdq t1,hc2,hc2
186 vmovd 0x26(m),t1x
187 vmovd 0x36(m),t2x
188 vpunpcklqdq t2,t1,t1
189 vperm2i128 $0x20,t1,hc2,hc2
190 vpsrld $4,hc2,hc2
191 vpand ANMASK(%rip),hc2,hc2
192 vmovd h2,t1x
193 vpaddd t1,hc2,hc2
194 # hc3 = [(m[57-60] >> 6) & 0x3ffffff, (m[41-44] >> 6) & 0x3ffffff,
195 # (m[25-28] >> 6) & 0x3ffffff, (m[ 9-12] >> 6) & 0x3ffffff + h3]
196 vmovd 0x09(m),hc3x
197 vmovd 0x19(m),t1x
198 vpunpcklqdq t1,hc3,hc3
199 vmovd 0x29(m),t1x
200 vmovd 0x39(m),t2x
201 vpunpcklqdq t2,t1,t1
202 vperm2i128 $0x20,t1,hc3,hc3
203 vpsrld $6,hc3,hc3
204 vpand ANMASK(%rip),hc3,hc3
205 vmovd h3,t1x
206 vpaddd t1,hc3,hc3
207 # hc4 = [(m[60-63] >> 8) | (1<<24), (m[44-47] >> 8) | (1<<24),
208 # (m[28-31] >> 8) | (1<<24), (m[12-15] >> 8) | (1<<24) + h4]
209 vmovd 0x0c(m),hc4x
210 vmovd 0x1c(m),t1x
211 vpunpcklqdq t1,hc4,hc4
212 vmovd 0x2c(m),t1x
213 vmovd 0x3c(m),t2x
214 vpunpcklqdq t2,t1,t1
215 vperm2i128 $0x20,t1,hc4,hc4
216 vpsrld $8,hc4,hc4
217 vpor ORMASK(%rip),hc4,hc4
218 vmovd h4,t1x
219 vpaddd t1,hc4,hc4
221 # t1 = [ hc0[3] * r0, hc0[2] * u0, hc0[1] * w0, hc0[0] * y0 ]
222 vpmuludq hc0,ruwy0,t1
223 # t1 += [ hc1[3] * s4, hc1[2] * v4, hc1[1] * x4, hc1[0] * z4 ]
224 vpmuludq hc1,svxz4,t2
225 vpaddq t2,t1,t1
226 # t1 += [ hc2[3] * s3, hc2[2] * v3, hc2[1] * x3, hc2[0] * z3 ]
227 vpmuludq hc2,svxz3,t2
228 vpaddq t2,t1,t1
229 # t1 += [ hc3[3] * s2, hc3[2] * v2, hc3[1] * x2, hc3[0] * z2 ]
230 vpmuludq hc3,svxz2,t2
231 vpaddq t2,t1,t1
232 # t1 += [ hc4[3] * s1, hc4[2] * v1, hc4[1] * x1, hc4[0] * z1 ]
233 vpmuludq hc4,svxz1,t2
234 vpaddq t2,t1,t1
235 # d0 = t1[0] + t1[1] + t[2] + t[3]
236 vpermq $0xee,t1,t2
237 vpaddq t2,t1,t1
238 vpsrldq $8,t1,t2
239 vpaddq t2,t1,t1
240 vmovq t1x,d0
242 # t1 = [ hc0[3] * r1, hc0[2] * u1,hc0[1] * w1, hc0[0] * y1 ]
243 vpmuludq hc0,ruwy1,t1
244 # t1 += [ hc1[3] * r0, hc1[2] * u0, hc1[1] * w0, hc1[0] * y0 ]
245 vpmuludq hc1,ruwy0,t2
246 vpaddq t2,t1,t1
247 # t1 += [ hc2[3] * s4, hc2[2] * v4, hc2[1] * x4, hc2[0] * z4 ]
248 vpmuludq hc2,svxz4,t2
249 vpaddq t2,t1,t1
250 # t1 += [ hc3[3] * s3, hc3[2] * v3, hc3[1] * x3, hc3[0] * z3 ]
251 vpmuludq hc3,svxz3,t2
252 vpaddq t2,t1,t1
253 # t1 += [ hc4[3] * s2, hc4[2] * v2, hc4[1] * x2, hc4[0] * z2 ]
254 vpmuludq hc4,svxz2,t2
255 vpaddq t2,t1,t1
256 # d1 = t1[0] + t1[1] + t1[3] + t1[4]
257 vpermq $0xee,t1,t2
258 vpaddq t2,t1,t1
259 vpsrldq $8,t1,t2
260 vpaddq t2,t1,t1
261 vmovq t1x,d1
263 # t1 = [ hc0[3] * r2, hc0[2] * u2, hc0[1] * w2, hc0[0] * y2 ]
264 vpmuludq hc0,ruwy2,t1
265 # t1 += [ hc1[3] * r1, hc1[2] * u1, hc1[1] * w1, hc1[0] * y1 ]
266 vpmuludq hc1,ruwy1,t2
267 vpaddq t2,t1,t1
268 # t1 += [ hc2[3] * r0, hc2[2] * u0, hc2[1] * w0, hc2[0] * y0 ]
269 vpmuludq hc2,ruwy0,t2
270 vpaddq t2,t1,t1
271 # t1 += [ hc3[3] * s4, hc3[2] * v4, hc3[1] * x4, hc3[0] * z4 ]
272 vpmuludq hc3,svxz4,t2
273 vpaddq t2,t1,t1
274 # t1 += [ hc4[3] * s3, hc4[2] * v3, hc4[1] * x3, hc4[0] * z3 ]
275 vpmuludq hc4,svxz3,t2
276 vpaddq t2,t1,t1
277 # d2 = t1[0] + t1[1] + t1[2] + t1[3]
278 vpermq $0xee,t1,t2
279 vpaddq t2,t1,t1
280 vpsrldq $8,t1,t2
281 vpaddq t2,t1,t1
282 vmovq t1x,d2
284 # t1 = [ hc0[3] * r3, hc0[2] * u3, hc0[1] * w3, hc0[0] * y3 ]
285 vpmuludq hc0,ruwy3,t1
286 # t1 += [ hc1[3] * r2, hc1[2] * u2, hc1[1] * w2, hc1[0] * y2 ]
287 vpmuludq hc1,ruwy2,t2
288 vpaddq t2,t1,t1
289 # t1 += [ hc2[3] * r1, hc2[2] * u1, hc2[1] * w1, hc2[0] * y1 ]
290 vpmuludq hc2,ruwy1,t2
291 vpaddq t2,t1,t1
292 # t1 += [ hc3[3] * r0, hc3[2] * u0, hc3[1] * w0, hc3[0] * y0 ]
293 vpmuludq hc3,ruwy0,t2
294 vpaddq t2,t1,t1
295 # t1 += [ hc4[3] * s4, hc4[2] * v4, hc4[1] * x4, hc4[0] * z4 ]
296 vpmuludq hc4,svxz4,t2
297 vpaddq t2,t1,t1
298 # d3 = t1[0] + t1[1] + t1[2] + t1[3]
299 vpermq $0xee,t1,t2
300 vpaddq t2,t1,t1
301 vpsrldq $8,t1,t2
302 vpaddq t2,t1,t1
303 vmovq t1x,d3
305 # t1 = [ hc0[3] * r4, hc0[2] * u4, hc0[1] * w4, hc0[0] * y4 ]
306 vpmuludq hc0,ruwy4,t1
307 # t1 += [ hc1[3] * r3, hc1[2] * u3, hc1[1] * w3, hc1[0] * y3 ]
308 vpmuludq hc1,ruwy3,t2
309 vpaddq t2,t1,t1
310 # t1 += [ hc2[3] * r2, hc2[2] * u2, hc2[1] * w2, hc2[0] * y2 ]
311 vpmuludq hc2,ruwy2,t2
312 vpaddq t2,t1,t1
313 # t1 += [ hc3[3] * r1, hc3[2] * u1, hc3[1] * w1, hc3[0] * y1 ]
314 vpmuludq hc3,ruwy1,t2
315 vpaddq t2,t1,t1
316 # t1 += [ hc4[3] * r0, hc4[2] * u0, hc4[1] * w0, hc4[0] * y0 ]
317 vpmuludq hc4,ruwy0,t2
318 vpaddq t2,t1,t1
319 # d4 = t1[0] + t1[1] + t1[2] + t1[3]
320 vpermq $0xee,t1,t2
321 vpaddq t2,t1,t1
322 vpsrldq $8,t1,t2
323 vpaddq t2,t1,t1
324 vmovq t1x,d4
326 # Now do a partial reduction mod (2^130)-5, carrying h0 -> h1 -> h2 ->
327 # h3 -> h4 -> h0 -> h1 to get h0,h2,h3,h4 < 2^26 and h1 < 2^26 + a small
328 # amount. Careful: we must not assume the carry bits 'd0 >> 26',
329 # 'd1 >> 26', 'd2 >> 26', 'd3 >> 26', and '(d4 >> 26) * 5' fit in 32-bit
330 # integers. It's true in a single-block implementation, but not here.
332 # d1 += d0 >> 26
333 mov d0,%rax
334 shr $26,%rax
335 add %rax,d1
336 # h0 = d0 & 0x3ffffff
337 mov d0,%rbx
338 and $0x3ffffff,%ebx
340 # d2 += d1 >> 26
341 mov d1,%rax
342 shr $26,%rax
343 add %rax,d2
344 # h1 = d1 & 0x3ffffff
345 mov d1,%rax
346 and $0x3ffffff,%eax
347 mov %eax,h1
349 # d3 += d2 >> 26
350 mov d2,%rax
351 shr $26,%rax
352 add %rax,d3
353 # h2 = d2 & 0x3ffffff
354 mov d2,%rax
355 and $0x3ffffff,%eax
356 mov %eax,h2
358 # d4 += d3 >> 26
359 mov d3,%rax
360 shr $26,%rax
361 add %rax,d4
362 # h3 = d3 & 0x3ffffff
363 mov d3,%rax
364 and $0x3ffffff,%eax
365 mov %eax,h3
367 # h0 += (d4 >> 26) * 5
368 mov d4,%rax
369 shr $26,%rax
370 lea (%rax,%rax,4),%rax
371 add %rax,%rbx
372 # h4 = d4 & 0x3ffffff
373 mov d4,%rax
374 and $0x3ffffff,%eax
375 mov %eax,h4
377 # h1 += h0 >> 26
378 mov %rbx,%rax
379 shr $26,%rax
380 add %eax,h1
381 # h0 = h0 & 0x3ffffff
382 andl $0x3ffffff,%ebx
383 mov %ebx,h0
385 add $0x40,m
386 dec %rcx
387 jnz .Ldoblock4
389 vzeroupper
390 pop %r13
391 pop %r12
392 pop %rbx
393 ret
394 ENDPROC(poly1305_4block_avx2)