From patchwork Wed Jul 13 17:36:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 590069 Delivered-To: patch@linaro.org Received: by 2002:a05:7000:5817:0:0:0:0 with SMTP id j23csp783038max; Wed, 13 Jul 2022 10:38:08 -0700 (PDT) X-Google-Smtp-Source: AGRyM1vIpnGAr6JP4NcXSZoMg2zkqdDOrzVrGssX4KINfgqPSR0UgBs4012HHvJa6IoqlwZ99H/Y X-Received: by 2002:a17:907:2c44:b0:72b:6160:c64c with SMTP id hf4-20020a1709072c4400b0072b6160c64cmr4683037ejc.55.1657733888639; Wed, 13 Jul 2022 10:38:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1657733888; cv=none; d=google.com; s=arc-20160816; b=OpPJ66UZt/9QxqHDG/o2k3r5mXW0iz9UGVHgcqtc4Coy9gvqlRmP0jytJM0ir6evTD yybsokhgbm7mb4HzFeRmkTSZGsF6cg7Vfisp3VIUXb/3nX3OSP4obLgfB+9+DMp6nm8I rbuwKmmArWCf9mBDZWD+95yPvzMM15ylTesXSk0ce1ziUSugfeGPpCmn/lvfh8y48pYH M3F9yRTGgqy8T9ez+2MkLNmVyNgLjUTNHANasP4LoXjkYDZKFxkWBTaSsGBpTKd1dmTp zE1MBR1P1Hd3RVIWw0PNSX2aawIdFZiMtHMOSB81jVZbw1S6IrxTtOkFQKTd2O+pPVNp vf9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:reply-to:from:list-subscribe:list-help:list-post :list-archive:list-unsubscribe:list-id:precedence :content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:dmarc-filter:delivered-to:dkim-signature :dkim-filter; bh=P3eKuvKsS1qRL0REo84oxRHFMWGdCxW6edMjH2ssmYQ=; b=D2eKFLIFYCFLq0rnbdv/eHrfzA5ZlwTb8S14CLofoRmYI2HBFbSI9HohgcEUpme3B+ YJFSncNtalC1RmicmEHy8zO9CzLrYHJNyT08XbIxUXjkmbzhUPyDVm7nfUmiNxV75MlC tCc1AyaYzRJXejD2ULgq8Y10/N4dIzufYkOyovUzwe7vGg/m7J+86Tf32Z6MVO0mzcDE TGrfWz3uGfqTwTr+mISo6X5mHFVHu2NYpR6tSWfvDstjc4K+HQViVTRjhnmvuTCaxiq+ QmyrP86kcMGLQd7o5kwY8B7gzleoWUyR1QoBW/r8KCW5WK8C9jOWft6ufcZz2nbcLjaE 1NzQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@sourceware.org header.s=default header.b=CF9cNDzd; spf=pass (google.com: domain of libc-alpha-bounces+patch=linaro.org@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="libc-alpha-bounces+patch=linaro.org@sourceware.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=sourceware.org Return-Path: Received: from sourceware.org (server2.sourceware.org. [2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id hs16-20020a1709073e9000b0072ed9ed7276si107717ejc.203.2022.07.13.10.38.08 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 10:38:08 -0700 (PDT) Received-SPF: pass (google.com: domain of libc-alpha-bounces+patch=linaro.org@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@sourceware.org header.s=default header.b=CF9cNDzd; spf=pass (google.com: domain of libc-alpha-bounces+patch=linaro.org@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="libc-alpha-bounces+patch=linaro.org@sourceware.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 336EE388DF3D for ; Wed, 13 Jul 2022 17:38:07 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 336EE388DF3D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1657733887; bh=P3eKuvKsS1qRL0REo84oxRHFMWGdCxW6edMjH2ssmYQ=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=CF9cNDzd3ZYuc4cXLfuqt6xKDRCVlPpptpi70eS2wlii2VyQcl0NL5VeGjlyFWwpB CYJX7H27V+wt1d/o+awSxp8raNvMNRBJYIWPQHwCP5KoKXJB7NuLQ56XKo/St2bUwv uxUEi4oV9DNEW3gdA1hp7QpAdOgGP9B2O4g1DQvA= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-oi1-x230.google.com (mail-oi1-x230.google.com [IPv6:2607:f8b0:4864:20::230]) by sourceware.org (Postfix) with ESMTPS id 189263885532 for ; Wed, 13 Jul 2022 17:37:16 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 189263885532 Received: by mail-oi1-x230.google.com with SMTP id w184so8968273oie.3 for ; Wed, 13 Jul 2022 10:37:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=P3eKuvKsS1qRL0REo84oxRHFMWGdCxW6edMjH2ssmYQ=; b=eyM0Wh0XLRrmLftngAnpt7EeRI60jYu4+KXPsCfL9nhESWoGMUst9x3E0k1J5ro6u1 mDWkTzF18S5p9+wQNkFbCKYW9s4+ifRn2Orl9Y1zA0xOco8d2s3aMv1q5RO5b7/1GqeQ D/TMay67oO0Y/0oDjhRZIR9c07LtKiBUJf1DR8oFiXVfbky+oQh9mK9K3LTsrNAbx+hp fVAOYHgJVfAy9uKswprxkrRFge5KKgASSu9OLpmrTBovSRgftAA8UfwSCUGPgLUS9T/R mJ7Xb8XfCiFUHVyDt7lz/sphMj0ffH9mGfYHrYm8nprCGW0kPfEoIVlvNgSF+PFVbqhy Hamw== X-Gm-Message-State: AJIora8jx1CzrbsZHqBv20S9rKrXx2msmIgoHt5KFU+uoRDGHkahrmDy +G6B6A28U/fp7MCQ92QV+Il3v53Us4UkaQ== X-Received: by 2002:aca:1208:0:b0:32b:7fb5:f443 with SMTP id 8-20020aca1208000000b0032b7fb5f443mr1412593ois.269.1657733835068; Wed, 13 Jul 2022 10:37:15 -0700 (PDT) Received: from mandiga.. ([2804:431:c7ca:19c3:4d5a:3028:34cf:1669]) by smtp.gmail.com with ESMTPSA id o127-20020aca4185000000b00339c7af0e8esm5488651oia.51.2022.07.13.10.37.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 10:37:14 -0700 (PDT) To: libc-alpha@sourceware.org, Florian Weimer Subject: [PATCH v9 5/9] x86: Add SSE2 optimized chacha20 Date: Wed, 13 Jul 2022 14:36:53 -0300 Message-Id: <20220713173657.516725-6-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220713173657.516725-1-adhemerval.zanella@linaro.org> References: <20220713173657.516725-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-10.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_ASCII_DIVIDERS, KAM_NUMSUBJECT, KAM_SHORT, RCVD_IN_DNSWL_NONE, SCC_10_SHORT_WORD_LINES, SCC_5_SHORT_WORD_LINES, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Errors-To: libc-alpha-bounces+patch=linaro.org@sourceware.org Sender: "Libc-alpha" From: Adhemerval Zanella Netto It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-amd64-ssse3.S. It replaces the ROTATE_SHUF_2 (which uses pshufb) by ROTATE2 and thus making the original implementation SSE2. As for generic implementation, the last step that XOR with the input is omited. The final state register clearing is also omitted. On a Ryzen 9 5900X it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 443.11 arc4random_buf(16) [single-thread] 552.27 arc4random_buf(32) [single-thread] 626.86 arc4random_buf(48) [single-thread] 649.81 arc4random_buf(64) [single-thread] 663.95 arc4random_buf(80) [single-thread] 674.78 arc4random_buf(96) [single-thread] 675.17 arc4random_buf(112) [single-thread] 680.69 arc4random_buf(128) [single-thread] 683.20 ----------------------------------------------- SSE MB/s ----------------------------------------------- arc4random [single-thread] 704.25 arc4random_buf(16) [single-thread] 1018.17 arc4random_buf(32) [single-thread] 1315.27 arc4random_buf(48) [single-thread] 1449.36 arc4random_buf(64) [single-thread] 1511.16 arc4random_buf(80) [single-thread] 1539.48 arc4random_buf(96) [single-thread] 1571.06 arc4random_buf(112) [single-thread] 1596.16 arc4random_buf(128) [single-thread] 1613.48 ----------------------------------------------- Checked on x86_64-linux-gnu. --- LICENSES | 4 +- sysdeps/x86_64/Makefile | 6 + sysdeps/x86_64/chacha20-amd64-sse2.S | 306 +++++++++++++++++++++++++++ sysdeps/x86_64/chacha20_arch.h | 38 ++++ 4 files changed, 352 insertions(+), 2 deletions(-) create mode 100644 sysdeps/x86_64/chacha20-amd64-sse2.S create mode 100644 sysdeps/x86_64/chacha20_arch.h diff --git a/LICENSES b/LICENSES index a94ea89d0d..47e9cd8e31 100644 --- a/LICENSES +++ b/LICENSES @@ -390,8 +390,8 @@ Copyright 2001 by Stephen L. Moshier License along with this library; if not, see . */ -sysdeps/aarch64/chacha20-aarch64.S imports code from libgcrypt, with -the following notices: +sysdeps/aarch64/chacha20-aarch64.S and sysdeps/x86_64/chacha20-amd64-sse2.S +imports code from libgcrypt, with the following notices: Copyright (C) 2017-2019 Jussi Kivilinna diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile index e597a4855f..a2e5af3ca9 100644 --- a/sysdeps/x86_64/Makefile +++ b/sysdeps/x86_64/Makefile @@ -5,6 +5,12 @@ ifeq ($(subdir),csu) gen-as-const-headers += link-defines.sym endif +ifeq ($(subdir),stdlib) +sysdep_routines += \ + chacha20-amd64-sse2 \ + # sysdep_routines +endif + ifeq ($(subdir),gmon) sysdep_routines += _mcount # We cannot compile _mcount.S with -pg because that would create diff --git a/sysdeps/x86_64/chacha20-amd64-sse2.S b/sysdeps/x86_64/chacha20-amd64-sse2.S new file mode 100644 index 0000000000..7b30f61446 --- /dev/null +++ b/sysdeps/x86_64/chacha20-amd64-sse2.S @@ -0,0 +1,306 @@ +/* Optimized SSE2 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 + . */ + +/* chacha20-amd64-ssse3.S - SSSE3 implementation of ChaCha20 cipher + + Copyright (C) 2017-2019 Jussi Kivilinna + + 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 . +*/ + +/* 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 + +#ifdef PIC +# define rRIP (%rip) +#else +# define rRIP +#endif + +/* 'ret' instruction replacement for straight-line speculation mitigation */ +#define ret_spec_stop \ + ret; int3; + +/* register macros */ +#define INPUT %rdi +#define DST %rsi +#define SRC %rdx +#define NBLKS %rcx +#define ROUND %eax + +/* stack structure */ +#define STACK_VEC_X12 (16) +#define STACK_VEC_X13 (16 + STACK_VEC_X12) +#define STACK_TMP (16 + STACK_VEC_X13) +#define STACK_TMP1 (16 + STACK_TMP) +#define STACK_TMP2 (16 + STACK_TMP1) + +#define STACK_MAX (16 + STACK_TMP2) + +/* vector registers */ +#define X0 %xmm0 +#define X1 %xmm1 +#define X2 %xmm2 +#define X3 %xmm3 +#define X4 %xmm4 +#define X5 %xmm5 +#define X6 %xmm6 +#define X7 %xmm7 +#define X8 %xmm8 +#define X9 %xmm9 +#define X10 %xmm10 +#define X11 %xmm11 +#define X12 %xmm12 +#define X13 %xmm13 +#define X14 %xmm14 +#define X15 %xmm15 + +/********************************************************************** + helper macros + **********************************************************************/ + +/* 4x4 32-bit integer matrix transpose */ +#define TRANSPOSE_4x4(x0, x1, x2, x3, t1, t2, t3) \ + movdqa x0, t2; \ + punpckhdq x1, t2; \ + punpckldq x1, x0; \ + \ + movdqa x2, t1; \ + punpckldq x3, t1; \ + punpckhdq x3, x2; \ + \ + movdqa x0, x1; \ + punpckhqdq t1, x1; \ + punpcklqdq t1, x0; \ + \ + movdqa t2, x3; \ + punpckhqdq x2, x3; \ + punpcklqdq x2, t2; \ + movdqa t2, x2; + +/* fill xmm register with 32-bit value from memory */ +#define PBROADCASTD(mem32, xreg) \ + movd mem32, xreg; \ + pshufd $0, xreg, xreg; + +/********************************************************************** + 4-way chacha20 + **********************************************************************/ + +#define ROTATE2(v1,v2,c,tmp1,tmp2) \ + movdqa v1, tmp1; \ + movdqa v2, tmp2; \ + psrld $(32 - (c)), v1; \ + pslld $(c), tmp1; \ + paddb tmp1, v1; \ + psrld $(32 - (c)), v2; \ + pslld $(c), tmp2; \ + paddb tmp2, v2; + +#define XOR(ds,s) \ + pxor s, ds; + +#define PLUS(ds,s) \ + paddd s, ds; + +#define QUARTERROUND2(a1,b1,c1,d1,a2,b2,c2,d2,ign,tmp1,tmp2) \ + PLUS(a1,b1); PLUS(a2,b2); XOR(d1,a1); XOR(d2,a2); \ + ROTATE2(d1, d2, 16, tmp1, tmp2); \ + PLUS(c1,d1); PLUS(c2,d2); XOR(b1,c1); XOR(b2,c2); \ + ROTATE2(b1, b2, 12, tmp1, tmp2); \ + PLUS(a1,b1); PLUS(a2,b2); XOR(d1,a1); XOR(d2,a2); \ + ROTATE2(d1, d2, 8, tmp1, tmp2); \ + PLUS(c1,d1); PLUS(c2,d2); XOR(b1,c1); XOR(b2,c2); \ + ROTATE2(b1, b2, 7, tmp1, tmp2); + + .section .text.sse2,"ax",@progbits + +chacha20_data: + .align 16 +L(counter1): + .long 1,0,0,0 +L(inc_counter): + .long 0,1,2,3 +L(unsigned_cmp): + .long 0x80000000,0x80000000,0x80000000,0x80000000 + + .hidden __chacha20_sse2_blocks4 +ENTRY (__chacha20_sse2_blocks4) + /* input: + * %rdi: input + * %rsi: dst + * %rdx: src + * %rcx: nblks (multiple of 4) + */ + + 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 $~15, %rsp; + +L(loop4): + mov $20, ROUND; + + /* Construct counter vectors X12 and X13 */ + movdqa L(inc_counter) rRIP, X0; + movdqa L(unsigned_cmp) rRIP, X2; + PBROADCASTD((12 * 4)(INPUT), X12); + PBROADCASTD((13 * 4)(INPUT), X13); + paddd X0, X12; + movdqa X12, X1; + pxor X2, X0; + pxor X2, X1; + pcmpgtd X1, X0; + psubd X0, X13; + movdqa X12, (STACK_VEC_X12)(%rsp); + movdqa X13, (STACK_VEC_X13)(%rsp); + + /* Load vectors */ + PBROADCASTD((0 * 4)(INPUT), X0); + PBROADCASTD((1 * 4)(INPUT), X1); + PBROADCASTD((2 * 4)(INPUT), X2); + PBROADCASTD((3 * 4)(INPUT), X3); + PBROADCASTD((4 * 4)(INPUT), X4); + PBROADCASTD((5 * 4)(INPUT), X5); + PBROADCASTD((6 * 4)(INPUT), X6); + PBROADCASTD((7 * 4)(INPUT), X7); + PBROADCASTD((8 * 4)(INPUT), X8); + PBROADCASTD((9 * 4)(INPUT), X9); + PBROADCASTD((10 * 4)(INPUT), X10); + PBROADCASTD((11 * 4)(INPUT), X11); + PBROADCASTD((14 * 4)(INPUT), X14); + PBROADCASTD((15 * 4)(INPUT), X15); + movdqa X11, (STACK_TMP)(%rsp); + movdqa X15, (STACK_TMP1)(%rsp); + +L(round2_4): + QUARTERROUND2(X0, X4, X8, X12, X1, X5, X9, X13, tmp:=,X11,X15) + movdqa (STACK_TMP)(%rsp), X11; + movdqa (STACK_TMP1)(%rsp), X15; + movdqa X8, (STACK_TMP)(%rsp); + movdqa X9, (STACK_TMP1)(%rsp); + QUARTERROUND2(X2, X6, X10, X14, X3, X7, X11, X15, tmp:=,X8,X9) + QUARTERROUND2(X0, X5, X10, X15, X1, X6, X11, X12, tmp:=,X8,X9) + movdqa (STACK_TMP)(%rsp), X8; + movdqa (STACK_TMP1)(%rsp), X9; + movdqa X11, (STACK_TMP)(%rsp); + movdqa X15, (STACK_TMP1)(%rsp); + QUARTERROUND2(X2, X7, X8, X13, X3, X4, X9, X14, tmp:=,X11,X15) + sub $2, ROUND; + jnz L(round2_4); + + /* tmp := X15 */ + movdqa (STACK_TMP)(%rsp), X11; + PBROADCASTD((0 * 4)(INPUT), X15); + PLUS(X0, X15); + PBROADCASTD((1 * 4)(INPUT), X15); + PLUS(X1, X15); + PBROADCASTD((2 * 4)(INPUT), X15); + PLUS(X2, X15); + PBROADCASTD((3 * 4)(INPUT), X15); + PLUS(X3, X15); + PBROADCASTD((4 * 4)(INPUT), X15); + PLUS(X4, X15); + PBROADCASTD((5 * 4)(INPUT), X15); + PLUS(X5, X15); + PBROADCASTD((6 * 4)(INPUT), X15); + PLUS(X6, X15); + PBROADCASTD((7 * 4)(INPUT), X15); + PLUS(X7, X15); + PBROADCASTD((8 * 4)(INPUT), X15); + PLUS(X8, X15); + PBROADCASTD((9 * 4)(INPUT), X15); + PLUS(X9, X15); + PBROADCASTD((10 * 4)(INPUT), X15); + PLUS(X10, X15); + PBROADCASTD((11 * 4)(INPUT), X15); + PLUS(X11, X15); + movdqa (STACK_VEC_X12)(%rsp), X15; + PLUS(X12, X15); + movdqa (STACK_VEC_X13)(%rsp), X15; + PLUS(X13, X15); + movdqa X13, (STACK_TMP)(%rsp); + PBROADCASTD((14 * 4)(INPUT), X15); + PLUS(X14, X15); + movdqa (STACK_TMP1)(%rsp), X15; + movdqa X14, (STACK_TMP1)(%rsp); + PBROADCASTD((15 * 4)(INPUT), X13); + PLUS(X15, X13); + movdqa X15, (STACK_TMP2)(%rsp); + + /* Update counter */ + addq $4, (12 * 4)(INPUT); + + TRANSPOSE_4x4(X0, X1, X2, X3, X13, X14, X15); + movdqu X0, (64 * 0 + 16 * 0)(DST) + movdqu X1, (64 * 1 + 16 * 0)(DST) + movdqu X2, (64 * 2 + 16 * 0)(DST) + movdqu X3, (64 * 3 + 16 * 0)(DST) + TRANSPOSE_4x4(X4, X5, X6, X7, X0, X1, X2); + movdqa (STACK_TMP)(%rsp), X13; + movdqa (STACK_TMP1)(%rsp), X14; + movdqa (STACK_TMP2)(%rsp), X15; + movdqu X4, (64 * 0 + 16 * 1)(DST) + movdqu X5, (64 * 1 + 16 * 1)(DST) + movdqu X6, (64 * 2 + 16 * 1)(DST) + movdqu X7, (64 * 3 + 16 * 1)(DST) + TRANSPOSE_4x4(X8, X9, X10, X11, X0, X1, X2); + movdqu X8, (64 * 0 + 16 * 2)(DST) + movdqu X9, (64 * 1 + 16 * 2)(DST) + movdqu X10, (64 * 2 + 16 * 2)(DST) + movdqu X11, (64 * 3 + 16 * 2)(DST) + TRANSPOSE_4x4(X12, X13, X14, X15, X0, X1, X2); + movdqu X12, (64 * 0 + 16 * 3)(DST) + movdqu X13, (64 * 1 + 16 * 3)(DST) + movdqu X14, (64 * 2 + 16 * 3)(DST) + movdqu X15, (64 * 3 + 16 * 3)(DST) + + sub $4, NBLKS; + lea (4 * 64)(DST), DST; + lea (4 * 64)(SRC), SRC; + jnz L(loop4); + + /* eax zeroed by round loop. */ + leave; + cfi_adjust_cfa_offset(-8) + cfi_def_cfa_register(%rsp); + ret_spec_stop; +END (__chacha20_sse2_blocks4) diff --git a/sysdeps/x86_64/chacha20_arch.h b/sysdeps/x86_64/chacha20_arch.h new file mode 100644 index 0000000000..5738c840a9 --- /dev/null +++ b/sysdeps/x86_64/chacha20_arch.h @@ -0,0 +1,38 @@ +/* Chacha20 implementation, used on arc4random. + 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 + . */ + +#include +#include +#include + +unsigned int __chacha20_sse2_blocks4 (uint32_t *state, uint8_t *dst, + const uint8_t *src, size_t nblks) + attribute_hidden; + +static inline void +chacha20_crypt (uint32_t *state, uint8_t *dst, const uint8_t *src, + size_t bytes) +{ + _Static_assert (CHACHA20_BUFSIZE % 4 == 0, + "CHACHA20_BUFSIZE not multiple of 4"); + _Static_assert (CHACHA20_BUFSIZE >= CHACHA20_BLOCK_SIZE * 4, + "CHACHA20_BUFSIZE <= CHACHA20_BLOCK_SIZE * 4"); + + __chacha20_sse2_blocks4 (state, dst, src, + CHACHA20_BUFSIZE / CHACHA20_BLOCK_SIZE); +}