473 lines
10 KiB
ArmAsm
473 lines
10 KiB
ArmAsm
/*
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* Cast6 Cipher 8-way parallel algorithm (AVX/x86_64)
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*
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* Copyright (C) 2012 Johannes Goetzfried
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* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
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*
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* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#include <linux/linkage.h>
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#include "glue_helper-asm-avx.S"
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.file "cast6-avx-x86_64-asm_64.S"
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.extern cast_s1
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.extern cast_s2
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.extern cast_s3
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.extern cast_s4
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/* structure of crypto context */
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#define km 0
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#define kr (12*4*4)
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/* s-boxes */
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#define s1 cast_s1
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#define s2 cast_s2
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#define s3 cast_s3
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#define s4 cast_s4
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/**********************************************************************
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8-way AVX cast6
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**********************************************************************/
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#define CTX %rdi
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#define RA1 %xmm0
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#define RB1 %xmm1
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#define RC1 %xmm2
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#define RD1 %xmm3
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#define RA2 %xmm4
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#define RB2 %xmm5
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#define RC2 %xmm6
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#define RD2 %xmm7
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#define RX %xmm8
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#define RKM %xmm9
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#define RKR %xmm10
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#define RKRF %xmm11
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#define RKRR %xmm12
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#define R32 %xmm13
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#define R1ST %xmm14
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#define RTMP %xmm15
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#define RID1 %rbp
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#define RID1d %ebp
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#define RID2 %rsi
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#define RID2d %esi
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#define RGI1 %rdx
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#define RGI1bl %dl
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#define RGI1bh %dh
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#define RGI2 %rcx
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#define RGI2bl %cl
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#define RGI2bh %ch
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#define RGI3 %rax
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#define RGI3bl %al
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#define RGI3bh %ah
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#define RGI4 %rbx
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#define RGI4bl %bl
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#define RGI4bh %bh
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#define RFS1 %r8
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#define RFS1d %r8d
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#define RFS2 %r9
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#define RFS2d %r9d
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#define RFS3 %r10
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#define RFS3d %r10d
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#define lookup_32bit(src, dst, op1, op2, op3, interleave_op, il_reg) \
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movzbl src ## bh, RID1d; \
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movzbl src ## bl, RID2d; \
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shrq $16, src; \
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movl s1(, RID1, 4), dst ## d; \
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op1 s2(, RID2, 4), dst ## d; \
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movzbl src ## bh, RID1d; \
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movzbl src ## bl, RID2d; \
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interleave_op(il_reg); \
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op2 s3(, RID1, 4), dst ## d; \
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op3 s4(, RID2, 4), dst ## d;
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#define dummy(d) /* do nothing */
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#define shr_next(reg) \
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shrq $16, reg;
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#define F_head(a, x, gi1, gi2, op0) \
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op0 a, RKM, x; \
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vpslld RKRF, x, RTMP; \
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vpsrld RKRR, x, x; \
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vpor RTMP, x, x; \
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\
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vmovq x, gi1; \
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vpextrq $1, x, gi2;
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#define F_tail(a, x, gi1, gi2, op1, op2, op3) \
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lookup_32bit(##gi1, RFS1, op1, op2, op3, shr_next, ##gi1); \
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lookup_32bit(##gi2, RFS3, op1, op2, op3, shr_next, ##gi2); \
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\
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lookup_32bit(##gi1, RFS2, op1, op2, op3, dummy, none); \
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shlq $32, RFS2; \
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orq RFS1, RFS2; \
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lookup_32bit(##gi2, RFS1, op1, op2, op3, dummy, none); \
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shlq $32, RFS1; \
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orq RFS1, RFS3; \
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\
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vmovq RFS2, x; \
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vpinsrq $1, RFS3, x, x;
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#define F_2(a1, b1, a2, b2, op0, op1, op2, op3) \
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F_head(b1, RX, RGI1, RGI2, op0); \
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F_head(b2, RX, RGI3, RGI4, op0); \
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\
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F_tail(b1, RX, RGI1, RGI2, op1, op2, op3); \
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F_tail(b2, RTMP, RGI3, RGI4, op1, op2, op3); \
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\
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vpxor a1, RX, a1; \
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vpxor a2, RTMP, a2;
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#define F1_2(a1, b1, a2, b2) \
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F_2(a1, b1, a2, b2, vpaddd, xorl, subl, addl)
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#define F2_2(a1, b1, a2, b2) \
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F_2(a1, b1, a2, b2, vpxor, subl, addl, xorl)
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#define F3_2(a1, b1, a2, b2) \
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F_2(a1, b1, a2, b2, vpsubd, addl, xorl, subl)
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#define qop(in, out, f) \
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F ## f ## _2(out ## 1, in ## 1, out ## 2, in ## 2);
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#define get_round_keys(nn) \
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vbroadcastss (km+(4*(nn)))(CTX), RKM; \
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vpand R1ST, RKR, RKRF; \
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vpsubq RKRF, R32, RKRR; \
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vpsrldq $1, RKR, RKR;
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#define Q(n) \
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get_round_keys(4*n+0); \
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qop(RD, RC, 1); \
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\
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get_round_keys(4*n+1); \
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qop(RC, RB, 2); \
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\
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get_round_keys(4*n+2); \
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qop(RB, RA, 3); \
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\
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get_round_keys(4*n+3); \
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qop(RA, RD, 1);
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#define QBAR(n) \
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get_round_keys(4*n+3); \
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qop(RA, RD, 1); \
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\
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get_round_keys(4*n+2); \
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qop(RB, RA, 3); \
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\
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get_round_keys(4*n+1); \
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qop(RC, RB, 2); \
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\
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get_round_keys(4*n+0); \
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qop(RD, RC, 1);
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#define shuffle(mask) \
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vpshufb mask, RKR, RKR;
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#define preload_rkr(n, do_mask, mask) \
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vbroadcastss .L16_mask, RKR; \
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/* add 16-bit rotation to key rotations (mod 32) */ \
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vpxor (kr+n*16)(CTX), RKR, RKR; \
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do_mask(mask);
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#define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
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vpunpckldq x1, x0, t0; \
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vpunpckhdq x1, x0, t2; \
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vpunpckldq x3, x2, t1; \
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vpunpckhdq x3, x2, x3; \
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\
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vpunpcklqdq t1, t0, x0; \
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vpunpckhqdq t1, t0, x1; \
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vpunpcklqdq x3, t2, x2; \
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vpunpckhqdq x3, t2, x3;
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#define inpack_blocks(x0, x1, x2, x3, t0, t1, t2, rmask) \
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vpshufb rmask, x0, x0; \
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vpshufb rmask, x1, x1; \
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vpshufb rmask, x2, x2; \
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vpshufb rmask, x3, x3; \
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\
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transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
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#define outunpack_blocks(x0, x1, x2, x3, t0, t1, t2, rmask) \
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transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
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\
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vpshufb rmask, x0, x0; \
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vpshufb rmask, x1, x1; \
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vpshufb rmask, x2, x2; \
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vpshufb rmask, x3, x3;
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.data
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.align 16
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.Lxts_gf128mul_and_shl1_mask:
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.byte 0x87, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0
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.Lbswap_mask:
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.byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
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.Lbswap128_mask:
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.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
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.Lrkr_enc_Q_Q_QBAR_QBAR:
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.byte 0, 1, 2, 3, 4, 5, 6, 7, 11, 10, 9, 8, 15, 14, 13, 12
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.Lrkr_enc_QBAR_QBAR_QBAR_QBAR:
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.byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
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.Lrkr_dec_Q_Q_Q_Q:
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.byte 12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3
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.Lrkr_dec_Q_Q_QBAR_QBAR:
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.byte 12, 13, 14, 15, 8, 9, 10, 11, 7, 6, 5, 4, 3, 2, 1, 0
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.Lrkr_dec_QBAR_QBAR_QBAR_QBAR:
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.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
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.L16_mask:
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.byte 16, 16, 16, 16
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.L32_mask:
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.byte 32, 0, 0, 0
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.Lfirst_mask:
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.byte 0x1f, 0, 0, 0
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.text
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.align 8
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__cast6_enc_blk8:
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/* input:
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* %rdi: ctx, CTX
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* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: blocks
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* output:
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* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: encrypted blocks
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*/
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pushq %rbp;
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pushq %rbx;
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vmovdqa .Lbswap_mask, RKM;
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vmovd .Lfirst_mask, R1ST;
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vmovd .L32_mask, R32;
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inpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM);
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inpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM);
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preload_rkr(0, dummy, none);
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Q(0);
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Q(1);
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Q(2);
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Q(3);
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preload_rkr(1, shuffle, .Lrkr_enc_Q_Q_QBAR_QBAR);
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Q(4);
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Q(5);
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QBAR(6);
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QBAR(7);
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preload_rkr(2, shuffle, .Lrkr_enc_QBAR_QBAR_QBAR_QBAR);
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QBAR(8);
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QBAR(9);
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QBAR(10);
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QBAR(11);
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popq %rbx;
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popq %rbp;
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vmovdqa .Lbswap_mask, RKM;
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outunpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM);
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outunpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM);
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ret;
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ENDPROC(__cast6_enc_blk8)
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.align 8
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__cast6_dec_blk8:
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/* input:
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* %rdi: ctx, CTX
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* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: encrypted blocks
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* output:
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* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: decrypted blocks
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*/
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pushq %rbp;
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pushq %rbx;
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vmovdqa .Lbswap_mask, RKM;
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vmovd .Lfirst_mask, R1ST;
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vmovd .L32_mask, R32;
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inpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM);
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inpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM);
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preload_rkr(2, shuffle, .Lrkr_dec_Q_Q_Q_Q);
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Q(11);
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Q(10);
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Q(9);
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Q(8);
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preload_rkr(1, shuffle, .Lrkr_dec_Q_Q_QBAR_QBAR);
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Q(7);
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Q(6);
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QBAR(5);
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QBAR(4);
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preload_rkr(0, shuffle, .Lrkr_dec_QBAR_QBAR_QBAR_QBAR);
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QBAR(3);
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QBAR(2);
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QBAR(1);
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QBAR(0);
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popq %rbx;
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popq %rbp;
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vmovdqa .Lbswap_mask, RKM;
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outunpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM);
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outunpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM);
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ret;
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ENDPROC(__cast6_dec_blk8)
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ENTRY(cast6_ecb_enc_8way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src
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*/
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movq %rsi, %r11;
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load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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call __cast6_enc_blk8;
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store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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ret;
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ENDPROC(cast6_ecb_enc_8way)
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ENTRY(cast6_ecb_dec_8way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src
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*/
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movq %rsi, %r11;
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load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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call __cast6_dec_blk8;
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store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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ret;
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ENDPROC(cast6_ecb_dec_8way)
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ENTRY(cast6_cbc_dec_8way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src
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*/
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pushq %r12;
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movq %rsi, %r11;
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movq %rdx, %r12;
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load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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call __cast6_dec_blk8;
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store_cbc_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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popq %r12;
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ret;
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ENDPROC(cast6_cbc_dec_8way)
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ENTRY(cast6_ctr_8way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src
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* %rcx: iv (little endian, 128bit)
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*/
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pushq %r12;
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movq %rsi, %r11;
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movq %rdx, %r12;
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load_ctr_8way(%rcx, .Lbswap128_mask, RA1, RB1, RC1, RD1, RA2, RB2, RC2,
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RD2, RX, RKR, RKM);
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call __cast6_enc_blk8;
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store_ctr_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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popq %r12;
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ret;
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ENDPROC(cast6_ctr_8way)
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ENTRY(cast6_xts_enc_8way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src
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* %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
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*/
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movq %rsi, %r11;
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/* regs <= src, dst <= IVs, regs <= regs xor IVs */
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load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2,
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RX, RKR, RKM, .Lxts_gf128mul_and_shl1_mask);
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call __cast6_enc_blk8;
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/* dst <= regs xor IVs(in dst) */
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store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
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ret;
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ENDPROC(cast6_xts_enc_8way)
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ENTRY(cast6_xts_dec_8way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src
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* %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
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*/
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movq %rsi, %r11;
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/* regs <= src, dst <= IVs, regs <= regs xor IVs */
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load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2,
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RX, RKR, RKM, .Lxts_gf128mul_and_shl1_mask);
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call __cast6_dec_blk8;
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|
||
/* dst <= regs xor IVs(in dst) */
|
||
store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
|
||
|
||
ret;
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||
ENDPROC(cast6_xts_dec_8way)
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