From 3b56f944c5398114486d6abd60c465682b802072 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Netto Date: Thu, 21 Jul 2022 10:05:06 -0300 Subject: [PATCH] s390x: Add optimized chacha20 It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-s390x.S. The final state register clearing is omitted. On a z15 it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 198.92 arc4random_buf(16) [single-thread] 244.49 arc4random_buf(32) [single-thread] 282.73 arc4random_buf(48) [single-thread] 286.64 arc4random_buf(64) [single-thread] 320.06 arc4random_buf(80) [single-thread] 297.43 arc4random_buf(96) [single-thread] 310.96 arc4random_buf(112) [single-thread] 308.10 arc4random_buf(128) [single-thread] 309.90 ----------------------------------------------- VX. MB/s ----------------------------------------------- arc4random [single-thread] 430.26 arc4random_buf(16) [single-thread] 735.14 arc4random_buf(32) [single-thread] 1029.99 arc4random_buf(48) [single-thread] 1206.76 arc4random_buf(64) [single-thread] 1311.92 arc4random_buf(80) [single-thread] 1378.74 arc4random_buf(96) [single-thread] 1445.06 arc4random_buf(112) [single-thread] 1484.32 arc4random_buf(128) [single-thread] 1517.30 ----------------------------------------------- Checked on s390x-linux-gnu. --- LICENSES | 3 +- sysdeps/s390/s390-64/Makefile | 6 + sysdeps/s390/s390-64/chacha20-s390x.S | 573 ++++++++++++++++++++++++++++++++++ sysdeps/s390/s390-64/chacha20_arch.h | 45 +++ 4 files changed, 626 insertions(+), 1 deletion(-) create mode 100644 sysdeps/s390/s390-64/chacha20-s390x.S create mode 100644 sysdeps/s390/s390-64/chacha20_arch.h diff --git a/LICENSES b/LICENSES index e177af6..cd04fb6 100644 --- a/LICENSES +++ b/LICENSES @@ -392,7 +392,8 @@ Copyright 2001 by Stephen L. Moshier sysdeps/aarch64/chacha20-aarch64.S, sysdeps/x86_64/chacha20-amd64-sse2.S, sysdeps/x86_64/chacha20-amd64-avx2.S, and -sysdeps/powerpc/powerpc64/power8/chacha20-ppc.c imports code from libgcrypt, +sysdeps/powerpc/powerpc64/power8/chacha20-ppc.c, and +sysdeps/s390/s390-64/chacha20-s390x.S imports code from libgcrypt, with the following notices: Copyright (C) 2017-2019 Jussi Kivilinna diff --git a/sysdeps/s390/s390-64/Makefile b/sysdeps/s390/s390-64/Makefile index 66ed844..96c110f 100644 --- a/sysdeps/s390/s390-64/Makefile +++ b/sysdeps/s390/s390-64/Makefile @@ -67,3 +67,9 @@ tests-container += tst-glibc-hwcaps-cache endif endif # $(subdir) == elf + +ifeq ($(subdir),stdlib) +sysdep_routines += \ + chacha20-s390x \ + # sysdep_routines +endif diff --git a/sysdeps/s390/s390-64/chacha20-s390x.S b/sysdeps/s390/s390-64/chacha20-s390x.S new file mode 100644 index 0000000..e38504d --- /dev/null +++ b/sysdeps/s390/s390-64/chacha20-s390x.S @@ -0,0 +1,573 @@ +/* Optimized s390x 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-s390x.S - zSeries implementation of ChaCha20 cipher + + Copyright (C) 2020 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 . + */ + +#include + +#ifdef HAVE_S390_VX_ASM_SUPPORT + +/* CFA expressions are used for pointing CFA and registers to + * SP relative offsets. */ +# define DW_REGNO_SP 15 + +/* Fixed length encoding used for integers for now. */ +# define DW_SLEB128_7BIT(value) \ + 0x00|((value) & 0x7f) +# define DW_SLEB128_28BIT(value) \ + 0x80|((value)&0x7f), \ + 0x80|(((value)>>7)&0x7f), \ + 0x80|(((value)>>14)&0x7f), \ + 0x00|(((value)>>21)&0x7f) + +# define cfi_cfa_on_stack(rsp_offs,cfa_depth) \ + .cfi_escape \ + 0x0f, /* DW_CFA_def_cfa_expression */ \ + DW_SLEB128_7BIT(11), /* length */ \ + 0x7f, /* DW_OP_breg15, rsp + constant */ \ + DW_SLEB128_28BIT(rsp_offs), \ + 0x06, /* DW_OP_deref */ \ + 0x23, /* DW_OP_plus_constu */ \ + DW_SLEB128_28BIT((cfa_depth)+160) + +.machine "z13+vx" +.text + +.balign 16 +.Lconsts: +.Lwordswap: + .byte 12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3 +.Lbswap128: + .byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 +.Lbswap32: + .byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12 +.Lone: + .long 0, 0, 0, 1 +.Ladd_counter_0123: + .long 0, 1, 2, 3 +.Ladd_counter_4567: + .long 4, 5, 6, 7 + +/* register macros */ +#define INPUT %r2 +#define DST %r3 +#define SRC %r4 +#define NBLKS %r0 +#define ROUND %r1 + +/* stack structure */ + +#define STACK_FRAME_STD (8 * 16 + 8 * 4) +#define STACK_FRAME_F8_F15 (8 * 8) +#define STACK_FRAME_Y0_Y15 (16 * 16) +#define STACK_FRAME_CTR (4 * 16) +#define STACK_FRAME_PARAMS (6 * 8) + +#define STACK_MAX (STACK_FRAME_STD + STACK_FRAME_F8_F15 + \ + STACK_FRAME_Y0_Y15 + STACK_FRAME_CTR + \ + STACK_FRAME_PARAMS) + +#define STACK_F8 (STACK_MAX - STACK_FRAME_F8_F15) +#define STACK_F9 (STACK_F8 + 8) +#define STACK_F10 (STACK_F9 + 8) +#define STACK_F11 (STACK_F10 + 8) +#define STACK_F12 (STACK_F11 + 8) +#define STACK_F13 (STACK_F12 + 8) +#define STACK_F14 (STACK_F13 + 8) +#define STACK_F15 (STACK_F14 + 8) +#define STACK_Y0_Y15 (STACK_F8 - STACK_FRAME_Y0_Y15) +#define STACK_CTR (STACK_Y0_Y15 - STACK_FRAME_CTR) +#define STACK_INPUT (STACK_CTR - STACK_FRAME_PARAMS) +#define STACK_DST (STACK_INPUT + 8) +#define STACK_SRC (STACK_DST + 8) +#define STACK_NBLKS (STACK_SRC + 8) +#define STACK_POCTX (STACK_NBLKS + 8) +#define STACK_POSRC (STACK_POCTX + 8) + +#define STACK_G0_H3 STACK_Y0_Y15 + +/* vector registers */ +#define A0 %v0 +#define A1 %v1 +#define A2 %v2 +#define A3 %v3 + +#define B0 %v4 +#define B1 %v5 +#define B2 %v6 +#define B3 %v7 + +#define C0 %v8 +#define C1 %v9 +#define C2 %v10 +#define C3 %v11 + +#define D0 %v12 +#define D1 %v13 +#define D2 %v14 +#define D3 %v15 + +#define E0 %v16 +#define E1 %v17 +#define E2 %v18 +#define E3 %v19 + +#define F0 %v20 +#define F1 %v21 +#define F2 %v22 +#define F3 %v23 + +#define G0 %v24 +#define G1 %v25 +#define G2 %v26 +#define G3 %v27 + +#define H0 %v28 +#define H1 %v29 +#define H2 %v30 +#define H3 %v31 + +#define IO0 E0 +#define IO1 E1 +#define IO2 E2 +#define IO3 E3 +#define IO4 F0 +#define IO5 F1 +#define IO6 F2 +#define IO7 F3 + +#define S0 G0 +#define S1 G1 +#define S2 G2 +#define S3 G3 + +#define TMP0 H0 +#define TMP1 H1 +#define TMP2 H2 +#define TMP3 H3 + +#define X0 A0 +#define X1 A1 +#define X2 A2 +#define X3 A3 +#define X4 B0 +#define X5 B1 +#define X6 B2 +#define X7 B3 +#define X8 C0 +#define X9 C1 +#define X10 C2 +#define X11 C3 +#define X12 D0 +#define X13 D1 +#define X14 D2 +#define X15 D3 + +#define Y0 E0 +#define Y1 E1 +#define Y2 E2 +#define Y3 E3 +#define Y4 F0 +#define Y5 F1 +#define Y6 F2 +#define Y7 F3 +#define Y8 G0 +#define Y9 G1 +#define Y10 G2 +#define Y11 G3 +#define Y12 H0 +#define Y13 H1 +#define Y14 H2 +#define Y15 H3 + +/********************************************************************** + helper macros + **********************************************************************/ + +#define _ /*_*/ + +#define START_STACK(last_r) \ + lgr %r0, %r15; \ + lghi %r1, ~15; \ + stmg %r6, last_r, 6 * 8(%r15); \ + aghi %r0, -STACK_MAX; \ + ngr %r0, %r1; \ + lgr %r1, %r15; \ + cfi_def_cfa_register(1); \ + lgr %r15, %r0; \ + stg %r1, 0(%r15); \ + cfi_cfa_on_stack(0, 0); \ + std %f8, STACK_F8(%r15); \ + std %f9, STACK_F9(%r15); \ + std %f10, STACK_F10(%r15); \ + std %f11, STACK_F11(%r15); \ + std %f12, STACK_F12(%r15); \ + std %f13, STACK_F13(%r15); \ + std %f14, STACK_F14(%r15); \ + std %f15, STACK_F15(%r15); + +#define END_STACK(last_r) \ + lg %r1, 0(%r15); \ + ld %f8, STACK_F8(%r15); \ + ld %f9, STACK_F9(%r15); \ + ld %f10, STACK_F10(%r15); \ + ld %f11, STACK_F11(%r15); \ + ld %f12, STACK_F12(%r15); \ + ld %f13, STACK_F13(%r15); \ + ld %f14, STACK_F14(%r15); \ + ld %f15, STACK_F15(%r15); \ + lmg %r6, last_r, 6 * 8(%r1); \ + lgr %r15, %r1; \ + cfi_def_cfa_register(DW_REGNO_SP); + +#define PLUS(dst,src) \ + vaf dst, dst, src; + +#define XOR(dst,src) \ + vx dst, dst, src; + +#define ROTATE(v1,c) \ + verllf v1, v1, (c)(0); + +#define WORD_ROTATE(v1,s) \ + vsldb v1, v1, v1, ((s) * 4); + +#define DST_8(OPER, I, J) \ + OPER(A##I, J); OPER(B##I, J); OPER(C##I, J); OPER(D##I, J); \ + OPER(E##I, J); OPER(F##I, J); OPER(G##I, J); OPER(H##I, J); + +/********************************************************************** + round macros + **********************************************************************/ + +/********************************************************************** + 8-way chacha20 ("vertical") + **********************************************************************/ + +#define QUARTERROUND4_V8_POLY(x0,x1,x2,x3,x4,x5,x6,x7,\ + x8,x9,x10,x11,x12,x13,x14,x15,\ + y0,y1,y2,y3,y4,y5,y6,y7,\ + y8,y9,y10,y11,y12,y13,y14,y15,\ + op1,op2,op3,op4,op5,op6,op7,op8,\ + op9,op10,op11,op12) \ + op1; \ + PLUS(x0, x1); PLUS(x4, x5); \ + PLUS(x8, x9); PLUS(x12, x13); \ + PLUS(y0, y1); PLUS(y4, y5); \ + PLUS(y8, y9); PLUS(y12, y13); \ + op2; \ + XOR(x3, x0); XOR(x7, x4); \ + XOR(x11, x8); XOR(x15, x12); \ + XOR(y3, y0); XOR(y7, y4); \ + XOR(y11, y8); XOR(y15, y12); \ + op3; \ + ROTATE(x3, 16); ROTATE(x7, 16); \ + ROTATE(x11, 16); ROTATE(x15, 16); \ + ROTATE(y3, 16); ROTATE(y7, 16); \ + ROTATE(y11, 16); ROTATE(y15, 16); \ + op4; \ + PLUS(x2, x3); PLUS(x6, x7); \ + PLUS(x10, x11); PLUS(x14, x15); \ + PLUS(y2, y3); PLUS(y6, y7); \ + PLUS(y10, y11); PLUS(y14, y15); \ + op5; \ + XOR(x1, x2); XOR(x5, x6); \ + XOR(x9, x10); XOR(x13, x14); \ + XOR(y1, y2); XOR(y5, y6); \ + XOR(y9, y10); XOR(y13, y14); \ + op6; \ + ROTATE(x1,12); ROTATE(x5,12); \ + ROTATE(x9,12); ROTATE(x13,12); \ + ROTATE(y1,12); ROTATE(y5,12); \ + ROTATE(y9,12); ROTATE(y13,12); \ + op7; \ + PLUS(x0, x1); PLUS(x4, x5); \ + PLUS(x8, x9); PLUS(x12, x13); \ + PLUS(y0, y1); PLUS(y4, y5); \ + PLUS(y8, y9); PLUS(y12, y13); \ + op8; \ + XOR(x3, x0); XOR(x7, x4); \ + XOR(x11, x8); XOR(x15, x12); \ + XOR(y3, y0); XOR(y7, y4); \ + XOR(y11, y8); XOR(y15, y12); \ + op9; \ + ROTATE(x3,8); ROTATE(x7,8); \ + ROTATE(x11,8); ROTATE(x15,8); \ + ROTATE(y3,8); ROTATE(y7,8); \ + ROTATE(y11,8); ROTATE(y15,8); \ + op10; \ + PLUS(x2, x3); PLUS(x6, x7); \ + PLUS(x10, x11); PLUS(x14, x15); \ + PLUS(y2, y3); PLUS(y6, y7); \ + PLUS(y10, y11); PLUS(y14, y15); \ + op11; \ + XOR(x1, x2); XOR(x5, x6); \ + XOR(x9, x10); XOR(x13, x14); \ + XOR(y1, y2); XOR(y5, y6); \ + XOR(y9, y10); XOR(y13, y14); \ + op12; \ + ROTATE(x1,7); ROTATE(x5,7); \ + ROTATE(x9,7); ROTATE(x13,7); \ + ROTATE(y1,7); ROTATE(y5,7); \ + ROTATE(y9,7); ROTATE(y13,7); + +#define QUARTERROUND4_V8(x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,\ + y0,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10,y11,y12,y13,y14,y15) \ + QUARTERROUND4_V8_POLY(x0,x1,x2,x3,x4,x5,x6,x7,\ + x8,x9,x10,x11,x12,x13,x14,x15,\ + y0,y1,y2,y3,y4,y5,y6,y7,\ + y8,y9,y10,y11,y12,y13,y14,y15,\ + ,,,,,,,,,,,) + +#define TRANSPOSE_4X4_2(v0,v1,v2,v3,va,vb,vc,vd,tmp0,tmp1,tmp2,tmpa,tmpb,tmpc) \ + vmrhf tmp0, v0, v1; \ + vmrhf tmp1, v2, v3; \ + vmrlf tmp2, v0, v1; \ + vmrlf v3, v2, v3; \ + vmrhf tmpa, va, vb; \ + vmrhf tmpb, vc, vd; \ + vmrlf tmpc, va, vb; \ + vmrlf vd, vc, vd; \ + vpdi v0, tmp0, tmp1, 0; \ + vpdi v1, tmp0, tmp1, 5; \ + vpdi v2, tmp2, v3, 0; \ + vpdi v3, tmp2, v3, 5; \ + vpdi va, tmpa, tmpb, 0; \ + vpdi vb, tmpa, tmpb, 5; \ + vpdi vc, tmpc, vd, 0; \ + vpdi vd, tmpc, vd, 5; + +.balign 8 +.globl __chacha20_s390x_vx_blocks8 +ENTRY (__chacha20_s390x_vx_blocks8) + /* input: + * %r2: input + * %r3: dst + * %r4: src + * %r5: nblks (multiple of 8) + */ + + START_STACK(%r8); + lgr NBLKS, %r5; + + larl %r7, .Lconsts; + + /* Load counter. */ + lg %r8, (12 * 4)(INPUT); + rllg %r8, %r8, 32; + +.balign 4 + /* Process eight chacha20 blocks per loop. */ +.Lloop8: + vlm Y0, Y3, 0(INPUT); + + slgfi NBLKS, 8; + lghi ROUND, (20 / 2); + + /* Construct counter vectors X12/X13 & Y12/Y13. */ + vl X4, (.Ladd_counter_0123 - .Lconsts)(%r7); + vl Y4, (.Ladd_counter_4567 - .Lconsts)(%r7); + vrepf Y12, Y3, 0; + vrepf Y13, Y3, 1; + vaccf X5, Y12, X4; + vaccf Y5, Y12, Y4; + vaf X12, Y12, X4; + vaf Y12, Y12, Y4; + vaf X13, Y13, X5; + vaf Y13, Y13, Y5; + + vrepf X0, Y0, 0; + vrepf X1, Y0, 1; + vrepf X2, Y0, 2; + vrepf X3, Y0, 3; + vrepf X4, Y1, 0; + vrepf X5, Y1, 1; + vrepf X6, Y1, 2; + vrepf X7, Y1, 3; + vrepf X8, Y2, 0; + vrepf X9, Y2, 1; + vrepf X10, Y2, 2; + vrepf X11, Y2, 3; + vrepf X14, Y3, 2; + vrepf X15, Y3, 3; + + /* Store counters for blocks 0-7. */ + vstm X12, X13, (STACK_CTR + 0 * 16)(%r15); + vstm Y12, Y13, (STACK_CTR + 2 * 16)(%r15); + + vlr Y0, X0; + vlr Y1, X1; + vlr Y2, X2; + vlr Y3, X3; + vlr Y4, X4; + vlr Y5, X5; + vlr Y6, X6; + vlr Y7, X7; + vlr Y8, X8; + vlr Y9, X9; + vlr Y10, X10; + vlr Y11, X11; + vlr Y14, X14; + vlr Y15, X15; + + /* Update and store counter. */ + agfi %r8, 8; + rllg %r5, %r8, 32; + stg %r5, (12 * 4)(INPUT); + +.balign 4 +.Lround2_8: + QUARTERROUND4_V8(X0, X4, X8, X12, X1, X5, X9, X13, + X2, X6, X10, X14, X3, X7, X11, X15, + Y0, Y4, Y8, Y12, Y1, Y5, Y9, Y13, + Y2, Y6, Y10, Y14, Y3, Y7, Y11, Y15); + QUARTERROUND4_V8(X0, X5, X10, X15, X1, X6, X11, X12, + X2, X7, X8, X13, X3, X4, X9, X14, + Y0, Y5, Y10, Y15, Y1, Y6, Y11, Y12, + Y2, Y7, Y8, Y13, Y3, Y4, Y9, Y14); + brctg ROUND, .Lround2_8; + + /* Store blocks 4-7. */ + vstm Y0, Y15, STACK_Y0_Y15(%r15); + + /* Load counters for blocks 0-3. */ + vlm Y0, Y1, (STACK_CTR + 0 * 16)(%r15); + + lghi ROUND, 1; + j .Lfirst_output_4blks_8; + +.balign 4 +.Lsecond_output_4blks_8: + /* Load blocks 4-7. */ + vlm X0, X15, STACK_Y0_Y15(%r15); + + /* Load counters for blocks 4-7. */ + vlm Y0, Y1, (STACK_CTR + 2 * 16)(%r15); + + lghi ROUND, 0; + +.balign 4 + /* Output four chacha20 blocks per loop. */ +.Lfirst_output_4blks_8: + vlm Y12, Y15, 0(INPUT); + PLUS(X12, Y0); + PLUS(X13, Y1); + vrepf Y0, Y12, 0; + vrepf Y1, Y12, 1; + vrepf Y2, Y12, 2; + vrepf Y3, Y12, 3; + vrepf Y4, Y13, 0; + vrepf Y5, Y13, 1; + vrepf Y6, Y13, 2; + vrepf Y7, Y13, 3; + vrepf Y8, Y14, 0; + vrepf Y9, Y14, 1; + vrepf Y10, Y14, 2; + vrepf Y11, Y14, 3; + vrepf Y14, Y15, 2; + vrepf Y15, Y15, 3; + PLUS(X0, Y0); + PLUS(X1, Y1); + PLUS(X2, Y2); + PLUS(X3, Y3); + PLUS(X4, Y4); + PLUS(X5, Y5); + PLUS(X6, Y6); + PLUS(X7, Y7); + PLUS(X8, Y8); + PLUS(X9, Y9); + PLUS(X10, Y10); + PLUS(X11, Y11); + PLUS(X14, Y14); + PLUS(X15, Y15); + + vl Y15, (.Lbswap32 - .Lconsts)(%r7); + TRANSPOSE_4X4_2(X0, X1, X2, X3, X4, X5, X6, X7, + Y9, Y10, Y11, Y12, Y13, Y14); + TRANSPOSE_4X4_2(X8, X9, X10, X11, X12, X13, X14, X15, + Y9, Y10, Y11, Y12, Y13, Y14); + + vlm Y0, Y14, 0(SRC); + vperm X0, X0, X0, Y15; + vperm X1, X1, X1, Y15; + vperm X2, X2, X2, Y15; + vperm X3, X3, X3, Y15; + vperm X4, X4, X4, Y15; + vperm X5, X5, X5, Y15; + vperm X6, X6, X6, Y15; + vperm X7, X7, X7, Y15; + vperm X8, X8, X8, Y15; + vperm X9, X9, X9, Y15; + vperm X10, X10, X10, Y15; + vperm X11, X11, X11, Y15; + vperm X12, X12, X12, Y15; + vperm X13, X13, X13, Y15; + vperm X14, X14, X14, Y15; + vperm X15, X15, X15, Y15; + vl Y15, (15 * 16)(SRC); + + XOR(Y0, X0); + XOR(Y1, X4); + XOR(Y2, X8); + XOR(Y3, X12); + XOR(Y4, X1); + XOR(Y5, X5); + XOR(Y6, X9); + XOR(Y7, X13); + XOR(Y8, X2); + XOR(Y9, X6); + XOR(Y10, X10); + XOR(Y11, X14); + XOR(Y12, X3); + XOR(Y13, X7); + XOR(Y14, X11); + XOR(Y15, X15); + vstm Y0, Y15, 0(DST); + + aghi SRC, 256; + aghi DST, 256; + + clgije ROUND, 1, .Lsecond_output_4blks_8; + + clgijhe NBLKS, 8, .Lloop8; + + + END_STACK(%r8); + xgr %r2, %r2; + br %r14; +END (__chacha20_s390x_vx_blocks8) + +#endif /* HAVE_S390_VX_ASM_SUPPORT */ diff --git a/sysdeps/s390/s390-64/chacha20_arch.h b/sysdeps/s390/s390-64/chacha20_arch.h new file mode 100644 index 0000000..0c6abf7 --- /dev/null +++ b/sysdeps/s390/s390-64/chacha20_arch.h @@ -0,0 +1,45 @@ +/* s390x optimization for ChaCha20.VE_S390_VX_ASM_SUPPORT + 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_s390x_vx_blocks8 (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) +{ +#ifdef HAVE_S390_VX_ASM_SUPPORT + _Static_assert (CHACHA20_BUFSIZE % 8 == 0, + "CHACHA20_BUFSIZE not multiple of 8"); + _Static_assert (CHACHA20_BUFSIZE >= CHACHA20_BLOCK_SIZE * 8, + "CHACHA20_BUFSIZE < CHACHA20_BLOCK_SIZE * 8"); + + if (GLRO(dl_hwcap) & HWCAP_S390_VX) + { + __chacha20_s390x_vx_blocks8 (state, dst, src, + CHACHA20_BUFSIZE / CHACHA20_BLOCK_SIZE); + return; + } +#endif + chacha20_crypt_generic (state, dst, src, bytes); +} -- 2.7.4