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Diffstat (limited to 'sysdeps/x86_64/chacha20-amd64-avx2.S')
| -rw-r--r-- | sysdeps/x86_64/chacha20-amd64-avx2.S | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/sysdeps/x86_64/chacha20-amd64-avx2.S b/sysdeps/x86_64/chacha20-amd64-avx2.S new file mode 100644 index 0000000000..aefd1cdbd0 --- /dev/null +++ b/sysdeps/x86_64/chacha20-amd64-avx2.S @@ -0,0 +1,328 @@ +/* Optimized AVX2 implementation of ChaCha20 cipher. + Copyright (C) 2022 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +/* chacha20-amd64-avx2.S - AVX2 implementation of ChaCha20 cipher + + Copyright (C) 2017-2019 Jussi Kivilinna <jussi.kivilinna@iki.fi> + + This file is part of Libgcrypt. + + Libgcrypt is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of + the License, or (at your option) any later version. + + Libgcrypt is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this program; if not, see <https://www.gnu.org/licenses/>. +*/ + +/* Based on D. J. Bernstein reference implementation at + http://cr.yp.to/chacha.html: + + chacha-regs.c version 20080118 + D. J. Bernstein + Public domain. */ + +#include <sysdep.h> + +#ifdef PIC +# define rRIP (%rip) +#else +# define rRIP +#endif + +/* register macros */ +#define INPUT %rdi +#define DST %rsi +#define SRC %rdx +#define NBLKS %rcx +#define ROUND %eax + +/* stack structure */ +#define STACK_VEC_X12 (32) +#define STACK_VEC_X13 (32 + STACK_VEC_X12) +#define STACK_TMP (32 + STACK_VEC_X13) +#define STACK_TMP1 (32 + STACK_TMP) + +#define STACK_MAX (32 + STACK_TMP1) + +/* vector registers */ +#define X0 %ymm0 +#define X1 %ymm1 +#define X2 %ymm2 +#define X3 %ymm3 +#define X4 %ymm4 +#define X5 %ymm5 +#define X6 %ymm6 +#define X7 %ymm7 +#define X8 %ymm8 +#define X9 %ymm9 +#define X10 %ymm10 +#define X11 %ymm11 +#define X12 %ymm12 +#define X13 %ymm13 +#define X14 %ymm14 +#define X15 %ymm15 + +#define X0h %xmm0 +#define X1h %xmm1 +#define X2h %xmm2 +#define X3h %xmm3 +#define X4h %xmm4 +#define X5h %xmm5 +#define X6h %xmm6 +#define X7h %xmm7 +#define X8h %xmm8 +#define X9h %xmm9 +#define X10h %xmm10 +#define X11h %xmm11 +#define X12h %xmm12 +#define X13h %xmm13 +#define X14h %xmm14 +#define X15h %xmm15 + +/********************************************************************** + helper macros + **********************************************************************/ + +/* 4x4 32-bit integer matrix transpose */ +#define transpose_4x4(x0,x1,x2,x3,t1,t2) \ + vpunpckhdq x1, x0, t2; \ + vpunpckldq x1, x0, x0; \ + \ + vpunpckldq x3, x2, t1; \ + vpunpckhdq x3, x2, x2; \ + \ + vpunpckhqdq t1, x0, x1; \ + vpunpcklqdq t1, x0, x0; \ + \ + vpunpckhqdq x2, t2, x3; \ + vpunpcklqdq x2, t2, x2; + +/* 2x2 128-bit matrix transpose */ +#define transpose_16byte_2x2(x0,x1,t1) \ + vmovdqa x0, t1; \ + vperm2i128 $0x20, x1, x0, x0; \ + vperm2i128 $0x31, x1, t1, x1; + +/********************************************************************** + 8-way chacha20 + **********************************************************************/ + +#define ROTATE2(v1,v2,c,tmp) \ + vpsrld $(32 - (c)), v1, tmp; \ + vpslld $(c), v1, v1; \ + vpaddb tmp, v1, v1; \ + vpsrld $(32 - (c)), v2, tmp; \ + vpslld $(c), v2, v2; \ + vpaddb tmp, v2, v2; + +#define ROTATE_SHUF_2(v1,v2,shuf) \ + vpshufb shuf, v1, v1; \ + vpshufb shuf, v2, v2; + +#define XOR(ds,s) \ + vpxor s, ds, ds; + +#define PLUS(ds,s) \ + vpaddd s, ds, ds; + +#define QUARTERROUND2(a1,b1,c1,d1,a2,b2,c2,d2,ign,tmp1,\ + interleave_op1,interleave_op2,\ + interleave_op3,interleave_op4) \ + vbroadcasti128 .Lshuf_rol16 rRIP, tmp1; \ + interleave_op1; \ + PLUS(a1,b1); PLUS(a2,b2); XOR(d1,a1); XOR(d2,a2); \ + ROTATE_SHUF_2(d1, d2, tmp1); \ + interleave_op2; \ + PLUS(c1,d1); PLUS(c2,d2); XOR(b1,c1); XOR(b2,c2); \ + ROTATE2(b1, b2, 12, tmp1); \ + vbroadcasti128 .Lshuf_rol8 rRIP, tmp1; \ + interleave_op3; \ + PLUS(a1,b1); PLUS(a2,b2); XOR(d1,a1); XOR(d2,a2); \ + ROTATE_SHUF_2(d1, d2, tmp1); \ + interleave_op4; \ + PLUS(c1,d1); PLUS(c2,d2); XOR(b1,c1); XOR(b2,c2); \ + ROTATE2(b1, b2, 7, tmp1); + + .section .text.avx2, "ax", @progbits + .align 32 +chacha20_data: +L(shuf_rol16): + .byte 2,3,0,1,6,7,4,5,10,11,8,9,14,15,12,13 +L(shuf_rol8): + .byte 3,0,1,2,7,4,5,6,11,8,9,10,15,12,13,14 +L(inc_counter): + .byte 0,1,2,3,4,5,6,7 +L(unsigned_cmp): + .long 0x80000000 + + .hidden __chacha20_avx2_blocks8 +ENTRY (__chacha20_avx2_blocks8) + /* input: + * %rdi: input + * %rsi: dst + * %rdx: src + * %rcx: nblks (multiple of 8) + */ + vzeroupper; + + pushq %rbp; + cfi_adjust_cfa_offset(8); + cfi_rel_offset(rbp, 0) + movq %rsp, %rbp; + cfi_def_cfa_register(rbp); + + subq $STACK_MAX, %rsp; + andq $~31, %rsp; + +L(loop8): + mov $20, ROUND; + + /* Construct counter vectors X12 and X13 */ + vpmovzxbd L(inc_counter) rRIP, X0; + vpbroadcastd L(unsigned_cmp) rRIP, X2; + vpbroadcastd (12 * 4)(INPUT), X12; + vpbroadcastd (13 * 4)(INPUT), X13; + vpaddd X0, X12, X12; + vpxor X2, X0, X0; + vpxor X2, X12, X1; + vpcmpgtd X1, X0, X0; + vpsubd X0, X13, X13; + vmovdqa X12, (STACK_VEC_X12)(%rsp); + vmovdqa X13, (STACK_VEC_X13)(%rsp); + + /* Load vectors */ + vpbroadcastd (0 * 4)(INPUT), X0; + vpbroadcastd (1 * 4)(INPUT), X1; + vpbroadcastd (2 * 4)(INPUT), X2; + vpbroadcastd (3 * 4)(INPUT), X3; + vpbroadcastd (4 * 4)(INPUT), X4; + vpbroadcastd (5 * 4)(INPUT), X5; + vpbroadcastd (6 * 4)(INPUT), X6; + vpbroadcastd (7 * 4)(INPUT), X7; + vpbroadcastd (8 * 4)(INPUT), X8; + vpbroadcastd (9 * 4)(INPUT), X9; + vpbroadcastd (10 * 4)(INPUT), X10; + vpbroadcastd (11 * 4)(INPUT), X11; + vpbroadcastd (14 * 4)(INPUT), X14; + vpbroadcastd (15 * 4)(INPUT), X15; + vmovdqa X15, (STACK_TMP)(%rsp); + +L(round2): + QUARTERROUND2(X0, X4, X8, X12, X1, X5, X9, X13, tmp:=,X15,,,,) + vmovdqa (STACK_TMP)(%rsp), X15; + vmovdqa X8, (STACK_TMP)(%rsp); + QUARTERROUND2(X2, X6, X10, X14, X3, X7, X11, X15, tmp:=,X8,,,,) + QUARTERROUND2(X0, X5, X10, X15, X1, X6, X11, X12, tmp:=,X8,,,,) + vmovdqa (STACK_TMP)(%rsp), X8; + vmovdqa X15, (STACK_TMP)(%rsp); + QUARTERROUND2(X2, X7, X8, X13, X3, X4, X9, X14, tmp:=,X15,,,,) + sub $2, ROUND; + jnz L(round2); + + vmovdqa X8, (STACK_TMP1)(%rsp); + + /* tmp := X15 */ + vpbroadcastd (0 * 4)(INPUT), X15; + PLUS(X0, X15); + vpbroadcastd (1 * 4)(INPUT), X15; + PLUS(X1, X15); + vpbroadcastd (2 * 4)(INPUT), X15; + PLUS(X2, X15); + vpbroadcastd (3 * 4)(INPUT), X15; + PLUS(X3, X15); + vpbroadcastd (4 * 4)(INPUT), X15; + PLUS(X4, X15); + vpbroadcastd (5 * 4)(INPUT), X15; + PLUS(X5, X15); + vpbroadcastd (6 * 4)(INPUT), X15; + PLUS(X6, X15); + vpbroadcastd (7 * 4)(INPUT), X15; + PLUS(X7, X15); + transpose_4x4(X0, X1, X2, X3, X8, X15); + transpose_4x4(X4, X5, X6, X7, X8, X15); + vmovdqa (STACK_TMP1)(%rsp), X8; + transpose_16byte_2x2(X0, X4, X15); + transpose_16byte_2x2(X1, X5, X15); + transpose_16byte_2x2(X2, X6, X15); + transpose_16byte_2x2(X3, X7, X15); + vmovdqa (STACK_TMP)(%rsp), X15; + vmovdqu X0, (64 * 0 + 16 * 0)(DST) + vmovdqu X1, (64 * 1 + 16 * 0)(DST) + vpbroadcastd (8 * 4)(INPUT), X0; + PLUS(X8, X0); + vpbroadcastd (9 * 4)(INPUT), X0; + PLUS(X9, X0); + vpbroadcastd (10 * 4)(INPUT), X0; + PLUS(X10, X0); + vpbroadcastd (11 * 4)(INPUT), X0; + PLUS(X11, X0); + vmovdqa (STACK_VEC_X12)(%rsp), X0; + PLUS(X12, X0); + vmovdqa (STACK_VEC_X13)(%rsp), X0; + PLUS(X13, X0); + vpbroadcastd (14 * 4)(INPUT), X0; + PLUS(X14, X0); + vpbroadcastd (15 * 4)(INPUT), X0; + PLUS(X15, X0); + vmovdqu X2, (64 * 2 + 16 * 0)(DST) + vmovdqu X3, (64 * 3 + 16 * 0)(DST) + + /* Update counter */ + addq $8, (12 * 4)(INPUT); + + transpose_4x4(X8, X9, X10, X11, X0, X1); + transpose_4x4(X12, X13, X14, X15, X0, X1); + vmovdqu X4, (64 * 4 + 16 * 0)(DST) + vmovdqu X5, (64 * 5 + 16 * 0)(DST) + transpose_16byte_2x2(X8, X12, X0); + transpose_16byte_2x2(X9, X13, X0); + transpose_16byte_2x2(X10, X14, X0); + transpose_16byte_2x2(X11, X15, X0); + vmovdqu X6, (64 * 6 + 16 * 0)(DST) + vmovdqu X7, (64 * 7 + 16 * 0)(DST) + vmovdqu X8, (64 * 0 + 16 * 2)(DST) + vmovdqu X9, (64 * 1 + 16 * 2)(DST) + vmovdqu X10, (64 * 2 + 16 * 2)(DST) + vmovdqu X11, (64 * 3 + 16 * 2)(DST) + vmovdqu X12, (64 * 4 + 16 * 2)(DST) + vmovdqu X13, (64 * 5 + 16 * 2)(DST) + vmovdqu X14, (64 * 6 + 16 * 2)(DST) + vmovdqu X15, (64 * 7 + 16 * 2)(DST) + + sub $8, NBLKS; + lea (8 * 64)(DST), DST; + lea (8 * 64)(SRC), SRC; + jnz L(loop8); + + vzeroupper; + + /* eax zeroed by round loop. */ + leave; + cfi_adjust_cfa_offset(-8) + cfi_def_cfa_register(%rsp); + ret; + int3; +END(__chacha20_avx2_blocks8) |