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/* chacha20-s390x.S - zSeries implementation of ChaCha20 cipher
*
* Copyright (C) 2020 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
*/
#if defined (__s390x__) && __GNUC__ >= 4 && __ARCH__ >= 9
#include <config.h>
#if defined(HAVE_GCC_INLINE_ASM_S390X_VX)
#include "asm-common-s390x.h"
#include "asm-poly1305-s390x.h"
.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 CLEAR(x,...) vzero x;
#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_1(OPER, I, J) \
OPER(A##I, J);
#define DST_2(OPER, I, J) \
OPER(A##I, J); OPER(B##I, J);
#define DST_4(OPER, I, J) \
OPER(A##I, J); OPER(B##I, J); OPER(C##I, J); OPER(D##I, J);
#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);
#define DST_SRC_1(OPER, I, J) \
OPER(A##I, A##J);
#define DST_SRC_2(OPER, I, J) \
OPER(A##I, A##J); OPER(B##I, B##J);
#define DST_SRC_4(OPER, I, J) \
OPER(A##I, A##J); OPER(B##I, B##J); OPER(C##I, C##J); \
OPER(D##I, D##J);
#define DST_SRC_8(OPER, I, J) \
OPER(A##I, A##J); OPER(B##I, B##J); OPER(C##I, C##J); \
OPER(D##I, D##J); OPER(E##I, E##J); OPER(F##I, F##J); \
OPER(G##I, G##J); OPER(H##I, H##J);
/**********************************************************************
round macros
**********************************************************************/
#define QUARTERROUND4_POLY(wrot_1,wrot_2,wrot_3,op1,op2) \
op1; DST_SRC_1(PLUS, 0, 1); DST_SRC_1(XOR, 3, 0); DST_1(ROTATE, 3, 16); \
DST_SRC_1(PLUS, 2, 3); DST_SRC_1(XOR, 1, 2); DST_1(ROTATE, 1, 12); \
DST_SRC_1(PLUS, 0, 1); DST_SRC_1(XOR, 3, 0); DST_1(ROTATE, 3, 8); \
op2; DST_SRC_1(PLUS, 2, 3); DST_SRC_1(XOR, 1, 2); DST_1(ROTATE, 1, 7); \
DST_1(WORD_ROTATE, 3, wrot_3); \
DST_1(WORD_ROTATE, 2, wrot_2); \
DST_1(WORD_ROTATE, 1, wrot_1);
#define QUARTERROUND4(wrot_1,wrot_2,wrot_3) \
QUARTERROUND4_POLY(wrot_1,wrot_2,wrot_3,,)
#define QUARTERROUND4_2_POLY(wrot_1,wrot_2,wrot_3,op1,op2,op3,op4) \
op1; DST_SRC_2(PLUS, 0, 1); DST_SRC_2(XOR, 3, 0); DST_2(ROTATE, 3, 16); \
DST_SRC_2(PLUS, 2, 3); op2; DST_SRC_2(XOR, 1, 2); DST_2(ROTATE, 1, 12); \
DST_SRC_2(PLUS, 0, 1); DST_SRC_2(XOR, 3, 0); op3; DST_2(ROTATE, 3, 8); \
DST_SRC_2(PLUS, 2, 3); DST_SRC_2(XOR, 1, 2); DST_2(ROTATE, 1, 7); op4; \
DST_2(WORD_ROTATE, 3, wrot_3); \
DST_2(WORD_ROTATE, 2, wrot_2); \
DST_2(WORD_ROTATE, 1, wrot_1);
#define QUARTERROUND4_2(wrot_1,wrot_2,wrot_3) \
QUARTERROUND4_2_POLY(wrot_1,wrot_2,wrot_3,,,,)
#define QUARTERROUND4_4_POLY(wrot_1,wrot_2,wrot_3,op1,op2,op3,op4,op5,op6) \
DST_SRC_4(PLUS, 0, 1); DST_SRC_4(XOR, 3, 0); op1; DST_4(ROTATE, 3, 16); \
DST_SRC_4(PLUS, 2, 3); op2; DST_SRC_4(XOR, 1, 2); DST_4(ROTATE, 1, 12); \
op3; DST_SRC_4(PLUS, 0, 1); DST_SRC_4(XOR, 3, 0); op4; DST_4(ROTATE, 3, 8); \
DST_SRC_4(PLUS, 2, 3); op5; DST_SRC_4(XOR, 1, 2); DST_4(ROTATE, 1, 7); \
op6; \
DST_4(WORD_ROTATE, 3, wrot_3); \
DST_4(WORD_ROTATE, 2, wrot_2); \
DST_4(WORD_ROTATE, 1, wrot_1);
#define QUARTERROUND4_4(wrot_1,wrot_2,wrot_3) \
QUARTERROUND4_4_POLY(wrot_1,wrot_2,wrot_3,,,,,,)
/**********************************************************************
4-way && 2-way && 1-way chacha20 ("horizontal")
**********************************************************************/
.balign 8
.globl _gcry_chacha20_s390x_vx_blocks4_2_1
ELF(.type _gcry_chacha20_s390x_vx_blocks4_2_1,@function;)
_gcry_chacha20_s390x_vx_blocks4_2_1:
/* input:
* %r2: input
* %r3: dst
* %r4: src
* %r5: nblks
*/
CFI_STARTPROC();
START_STACK(%r7);
lgr NBLKS, %r5;
/* Load constants. */
larl %r7, .Lconsts;
vl TMP0, (.Lwordswap - .Lconsts)(%r7);
vl TMP1, (.Lone - .Lconsts)(%r7);
vl TMP2, (.Lbswap128 - .Lconsts)(%r7);
/* Load state. */
vlm S0, S3, 0(INPUT);
vperm S0, S0, S0, TMP0;
vperm S1, S1, S1, TMP0;
vperm S2, S2, S2, TMP0;
vperm S3, S3, S3, TMP0;
clgijl NBLKS, 4, .Lloop2;
.balign 4
.Lloop4:
/* Process four chacha20 blocks. */
vlr TMP3, S3;
lghi ROUND, (20 / 2);
vlr A0, S0;
vlr A1, S1;
vlr A2, S2;
vlr A3, TMP3;
vag TMP3, TMP3, TMP1;
vlr B0, S0;
vlr B1, S1;
vlr B2, S2;
vlr B3, TMP3;
vag TMP3, TMP3, TMP1;
vlr C0, S0;
vlr C1, S1;
vlr C2, S2;
vlr C3, TMP3;
vlr D0, S0;
vlr D1, S1;
vlr D2, S2;
vag D3, TMP3, TMP1;
slgfi NBLKS, 4;
.balign 4
.Lround2_4:
QUARTERROUND4_4(3, 2, 1);
QUARTERROUND4_4(1, 2, 3);
brctg ROUND, .Lround2_4;
vlm IO0, IO7, 0(SRC);
PLUS(A0, S0);
PLUS(A1, S1);
PLUS(A2, S2);
PLUS(A3, S3);
vag S3, S3, TMP1; /* Update counter. */
PLUS(B0, S0);
PLUS(B1, S1);
PLUS(B2, S2);
PLUS(B3, S3);
vag S3, S3, TMP1; /* Update counter. */
vperm A0, A0, A0, TMP2;
vperm A1, A1, A1, TMP2;
vperm A2, A2, A2, TMP2;
vperm A3, A3, A3, TMP2;
vperm B0, B0, B0, TMP2;
vperm B1, B1, B1, TMP2;
vperm B2, B2, B2, TMP2;
vperm B3, B3, B3, TMP2;
PLUS(C0, S0);
PLUS(C1, S1);
PLUS(C2, S2);
PLUS(C3, S3);
vag S3, S3, TMP1; /* Update counter. */
PLUS(D0, S0);
PLUS(D1, S1);
PLUS(D2, S2);
PLUS(D3, S3);
vag S3, S3, TMP1; /* Update counter. */
vperm C0, C0, C0, TMP2;
vperm C1, C1, C1, TMP2;
vperm C2, C2, C2, TMP2;
vperm C3, C3, C3, TMP2;
vperm D0, D0, D0, TMP2;
vperm D1, D1, D1, TMP2;
vperm D2, D2, D2, TMP2;
vperm D3, D3, D3, TMP2;
XOR(IO0, A0);
XOR(IO1, A1);
XOR(IO2, A2);
XOR(IO3, A3);
XOR(IO4, B0);
XOR(IO5, B1);
XOR(IO6, B2);
XOR(IO7, B3);
vlm A0, B3, 128(SRC);
vstm IO0, IO7, 0(DST);
XOR(A0, C0);
XOR(A1, C1);
XOR(A2, C2);
XOR(A3, C3);
XOR(B0, D0);
XOR(B1, D1);
XOR(B2, D2);
XOR(B3, D3);
vstm A0, B3, 128(DST);
aghi SRC, 256;
aghi DST, 256;
clgijhe NBLKS, 4, .Lloop4;
CLEAR(C0);
CLEAR(C1);
CLEAR(C2);
CLEAR(C3);
CLEAR(D0);
CLEAR(D1);
CLEAR(D2);
CLEAR(D3);
.balign 4
.Lloop2:
clgijl NBLKS, 2, .Lloop1;
/* Process two chacha20 blocks. */
lghi ROUND, (20 / 2);
vlr A0, S0;
vlr A1, S1;
vlr A2, S2;
vlr A3, S3;
vlr B0, S0;
vlr B1, S1;
vlr B2, S2;
vag B3, S3, TMP1;
slgfi NBLKS, 2;
.balign 4
.Lround2_2:
QUARTERROUND4_2(3, 2, 1);
QUARTERROUND4_2(1, 2, 3);
brctg ROUND, .Lround2_2;
vlm IO0, IO7, 0(SRC);
PLUS(A0, S0);
PLUS(A1, S1);
PLUS(A2, S2);
PLUS(A3, S3);
vag S3, S3, TMP1; /* Update counter. */
PLUS(B0, S0);
PLUS(B1, S1);
PLUS(B2, S2);
PLUS(B3, S3);
vag S3, S3, TMP1; /* Update counter. */
vperm A0, A0, A0, TMP2;
vperm A1, A1, A1, TMP2;
vperm A2, A2, A2, TMP2;
vperm A3, A3, A3, TMP2;
vperm B0, B0, B0, TMP2;
vperm B1, B1, B1, TMP2;
vperm B2, B2, B2, TMP2;
vperm B3, B3, B3, TMP2;
XOR(IO0, A0);
XOR(IO1, A1);
XOR(IO2, A2);
XOR(IO3, A3);
XOR(IO4, B0);
XOR(IO5, B1);
XOR(IO6, B2);
XOR(IO7, B3);
vstm IO0, IO7, 0(DST);
aghi SRC, 128;
aghi DST, 128;
clgijhe NBLKS, 2, .Lloop2;
CLEAR(B0);
CLEAR(B1);
CLEAR(B2);
CLEAR(B3);
.balign 4
.Lloop1:
clgijl NBLKS, 1, .Ldone;
/* Process one chacha20 block.*/
lghi ROUND, (20 / 2);
vlr A0, S0;
vlr A1, S1;
vlr A2, S2;
vlr A3, S3;
slgfi NBLKS, 1;
.balign 4
.Lround2_1:
QUARTERROUND4(3, 2, 1);
QUARTERROUND4(1, 2, 3);
brct ROUND, .Lround2_1;
vlm IO0, IO3, 0(SRC);
PLUS(A0, S0);
PLUS(A1, S1);
PLUS(A2, S2);
PLUS(A3, S3);
vag S3, S3, TMP1; /* Update counter. */
vperm A0, A0, A0, TMP2;
vperm A1, A1, A1, TMP2;
vperm A2, A2, A2, TMP2;
vperm A3, A3, A3, TMP2;
XOR(IO0, A0);
XOR(IO1, A1);
XOR(IO2, A2);
XOR(IO3, A3);
vstm IO0, IO3, 0(DST);
aghi SRC, 64;
aghi DST, 64;
clgijhe NBLKS, 1, .Lloop1;
.balign 4
.Ldone:
/* Store counter. */
vperm S3, S3, S3, TMP0;
vst S3, (48)(INPUT);
/* Clear the used vector registers. */
CLEAR(A0);
CLEAR(A1);
CLEAR(A2);
CLEAR(A3);
CLEAR(IO0);
CLEAR(IO1);
CLEAR(IO2);
CLEAR(IO3);
CLEAR(IO4);
CLEAR(IO5);
CLEAR(IO6);
CLEAR(IO7);
CLEAR(TMP0);
CLEAR(TMP1);
CLEAR(TMP2);
END_STACK(%r7);
xgr %r2, %r2;
br %r14;
CFI_ENDPROC();
ELF(.size _gcry_chacha20_s390x_vx_blocks4_2_1,
.-_gcry_chacha20_s390x_vx_blocks4_2_1;)
/**********************************************************************
4-way && 2-way && 1-way stitched chacha20-poly1305 ("horizontal")
**********************************************************************/
.balign 8
.globl _gcry_chacha20_poly1305_s390x_vx_blocks4_2_1
ELF(.type _gcry_chacha20_poly1305_s390x_vx_blocks4_2_1,@function;)
_gcry_chacha20_poly1305_s390x_vx_blocks4_2_1:
/* input:
* %r2: input
* %r3: dst
* %r4: src
* %r5: nblks
* %r6: poly1305 state
* 160(%r15): poly1305 src
*/
CFI_STARTPROC();
START_STACK(%r14);
lgr NBLKS, %r5;
/* Load constants. */
larl %r8, .Lconsts;
vl TMP0, (.Lwordswap - .Lconsts)(%r8);
vl TMP1, (.Lone - .Lconsts)(%r8);
vl TMP2, (.Lbswap128 - .Lconsts)(%r8);
/* Load state. */
vlm S0, S3, 0(INPUT);
vperm S0, S0, S0, TMP0;
vperm S1, S1, S1, TMP0;
vperm S2, S2, S2, TMP0;
vperm S3, S3, S3, TMP0;
/* Store parameters to stack. */
stmg %r2, %r6, STACK_INPUT(%r15);
lgr POLY_RSTATE, %r6;
lgr NBLKS, %r5;
lg POLY_RSRC, 0(%r15);
lg POLY_RSRC, 160(POLY_RSRC);
stg POLY_RSRC, STACK_POSRC(%r15);
/* Load poly1305 state */
POLY1305_LOAD_STATE();
clgijl NBLKS, 4, .Lloop2_poly;
.balign 4
.Lloop4_poly:
/* Process four chacha20 blocks and 16 poly1305 blocks. */
vlr TMP3, S3;
lghi ROUND, (20 / 4);
vlr A0, S0;
vlr A1, S1;
vlr A2, S2;
vlr A3, TMP3;
vag TMP3, TMP3, TMP1;
vlr B0, S0;
vlr B1, S1;
vlr B2, S2;
vlr B3, TMP3;
vag TMP3, TMP3, TMP1;
vlr C0, S0;
vlr C1, S1;
vlr C2, S2;
vlr C3, TMP3;
vlr D0, S0;
vlr D1, S1;
vlr D2, S2;
vag D3, TMP3, TMP1;
slgfi NBLKS, 4;
.balign 4
.Lround4_4_poly:
/* Total 15 poly1305 blocks processed by this loop. */
QUARTERROUND4_4_POLY(3, 2, 1,
POLY1305_BLOCK_PART1(0 * 16),
POLY1305_BLOCK_PART2(),
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4(),
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6());
QUARTERROUND4_4_POLY(1, 2, 3,
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8(),
POLY1305_BLOCK_PART1(1 * 16),
POLY1305_BLOCK_PART2(),
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4());
QUARTERROUND4_4_POLY(3, 2, 1,
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6(),
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8(),
POLY1305_BLOCK_PART1(2 * 16);
INC_POLY1305_SRC(3 * 16),
POLY1305_BLOCK_PART2());
QUARTERROUND4_4_POLY(1, 2, 3,
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4(),
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6(),
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8());
brctg ROUND, .Lround4_4_poly;
POLY1305_BLOCK_PART1(0 * 16);
INC_POLY1305_SRC(1 * 16);
stg POLY_RSRC, STACK_POSRC(%r15);
lg %r14, STACK_SRC(%r15);
vlm IO0, IO7, 0(%r14);
PLUS(A0, S0);
PLUS(A1, S1);
PLUS(A2, S2);
PLUS(A3, S3);
vag S3, S3, TMP1; /* Update counter. */
POLY1305_BLOCK_PART2();
PLUS(B0, S0);
PLUS(B1, S1);
PLUS(B2, S2);
PLUS(B3, S3);
vag S3, S3, TMP1; /* Update counter. */
POLY1305_BLOCK_PART3();
vperm A0, A0, A0, TMP2;
vperm A1, A1, A1, TMP2;
vperm A2, A2, A2, TMP2;
vperm A3, A3, A3, TMP2;
vperm B0, B0, B0, TMP2;
vperm B1, B1, B1, TMP2;
vperm B2, B2, B2, TMP2;
vperm B3, B3, B3, TMP2;
POLY1305_BLOCK_PART4();
PLUS(C0, S0);
PLUS(C1, S1);
PLUS(C2, S2);
PLUS(C3, S3);
vag S3, S3, TMP1; /* Update counter. */
PLUS(D0, S0);
PLUS(D1, S1);
PLUS(D2, S2);
PLUS(D3, S3);
vag S3, S3, TMP1; /* Update counter. */
POLY1305_BLOCK_PART5();
vperm C0, C0, C0, TMP2;
vperm C1, C1, C1, TMP2;
vperm C2, C2, C2, TMP2;
vperm C3, C3, C3, TMP2;
vperm D0, D0, D0, TMP2;
vperm D1, D1, D1, TMP2;
vperm D2, D2, D2, TMP2;
vperm D3, D3, D3, TMP2;
POLY1305_BLOCK_PART6();
XOR(IO0, A0);
XOR(IO1, A1);
XOR(IO2, A2);
XOR(IO3, A3);
XOR(IO4, B0);
XOR(IO5, B1);
XOR(IO6, B2);
XOR(IO7, B3);
vlm A0, B3, 128(%r14);
aghi %r14, 256;
stg %r14, STACK_SRC(%r15);
lg %r14, STACK_DST(%r15);
POLY1305_BLOCK_PART7();
vstm IO0, IO7, 0(%r14);
XOR(A0, C0);
XOR(A1, C1);
XOR(A2, C2);
XOR(A3, C3);
XOR(B0, D0);
XOR(B1, D1);
XOR(B2, D2);
XOR(B3, D3);
POLY1305_BLOCK_PART8();
vstm A0, B3, 128(%r14);
aghi %r14, 256;
stg %r14, STACK_DST(%r15);
lg POLY_RSRC, STACK_POSRC(%r15);
clgijhe NBLKS, 4, .Lloop4_poly;
CLEAR(C0);
CLEAR(C1);
CLEAR(C2);
CLEAR(C3);
CLEAR(D0);
CLEAR(D1);
CLEAR(D2);
CLEAR(D3);
.balign 4
.Lloop2_poly:
clgijl NBLKS, 2, .Lloop1_poly;
/* Process two chacha20 and eight poly1305 blocks. */
lghi ROUND, ((20 - 4) / 2);
vlr A0, S0;
vlr A1, S1;
vlr A2, S2;
vlr A3, S3;
vlr B0, S0;
vlr B1, S1;
vlr B2, S2;
vag B3, S3, TMP1;
slgfi NBLKS, 2;
.balign 4
.Lround4_2_poly:
/* Total eight poly1305 blocks processed by this loop. */
QUARTERROUND4_2_POLY(3, 2, 1,
POLY1305_BLOCK_PART1(0 * 16),
POLY1305_BLOCK_PART2(),
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4());
INC_POLY1305_SRC(1 * 16);
QUARTERROUND4_2_POLY(1, 2, 3,
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6(),
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8());
brctg ROUND, .Lround4_2_poly;
stg POLY_RSRC, STACK_POSRC(%r15);
lg %r14, STACK_SRC(%r15);
QUARTERROUND4_2(3, 2, 1);
QUARTERROUND4_2(1, 2, 3);
QUARTERROUND4_2(3, 2, 1);
QUARTERROUND4_2(1, 2, 3);
vlm IO0, IO7, 0(%r14);
aghi %r14, 128;
stg %r14, STACK_SRC(%r15);
PLUS(A0, S0);
PLUS(A1, S1);
PLUS(A2, S2);
PLUS(A3, S3);
vag S3, S3, TMP1; /* Update counter. */
PLUS(B0, S0);
PLUS(B1, S1);
PLUS(B2, S2);
PLUS(B3, S3);
vag S3, S3, TMP1; /* Update counter. */
vperm A0, A0, A0, TMP2;
vperm A1, A1, A1, TMP2;
vperm A2, A2, A2, TMP2;
vperm A3, A3, A3, TMP2;
vperm B0, B0, B0, TMP2;
vperm B1, B1, B1, TMP2;
vperm B2, B2, B2, TMP2;
vperm B3, B3, B3, TMP2;
lg %r14, STACK_DST(%r15);
XOR(IO0, A0);
XOR(IO1, A1);
XOR(IO2, A2);
XOR(IO3, A3);
XOR(IO4, B0);
XOR(IO5, B1);
XOR(IO6, B2);
XOR(IO7, B3);
vstm IO0, IO7, 0(%r14);
aghi %r14, 128;
stg %r14, STACK_DST(%r15);
lg POLY_RSRC, STACK_POSRC(%r15);
clgijhe NBLKS, 2, .Lloop2_poly;
CLEAR(B0);
CLEAR(B1);
CLEAR(B2);
CLEAR(B3);
.balign 4
.Lloop1_poly:
clgijl NBLKS, 1, .Ldone_poly;
/* Process one chacha20 block and four poly1305 blocks.*/
lghi ROUND, ((20 - 4) / 4);
vlr A0, S0;
vlr A1, S1;
vlr A2, S2;
vlr A3, S3;
slgfi NBLKS, 1;
.balign 4
.Lround4_1_poly:
/* Total four poly1305 blocks processed by this loop. */
QUARTERROUND4_POLY(3, 2, 1,
POLY1305_BLOCK_PART1(0 * 16),
POLY1305_BLOCK_PART2());
INC_POLY1305_SRC(1 * 16);
QUARTERROUND4_POLY(1, 2, 3,
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4());
QUARTERROUND4_POLY(3, 2, 1,
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6());
QUARTERROUND4_POLY(1, 2, 3,
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8());
brct ROUND, .Lround4_1_poly;
stg POLY_RSRC, STACK_POSRC(%r15);
lg %r14, STACK_SRC(%r15);
QUARTERROUND4(3, 2, 1);
QUARTERROUND4(1, 2, 3);
QUARTERROUND4(3, 2, 1);
QUARTERROUND4(1, 2, 3);
vlm IO0, IO3, 0(%r14);
aghi %r14, 64;
stg %r14, STACK_SRC(%r15);
PLUS(A0, S0);
PLUS(A1, S1);
PLUS(A2, S2);
PLUS(A3, S3);
vag S3, S3, TMP1; /* Update counter. */
lg %r14, STACK_DST(%r15);
vperm A0, A0, A0, TMP2;
vperm A1, A1, A1, TMP2;
vperm A2, A2, A2, TMP2;
vperm A3, A3, A3, TMP2;
XOR(IO0, A0);
XOR(IO1, A1);
XOR(IO2, A2);
XOR(IO3, A3);
vstm IO0, IO3, 0(%r14);
aghi %r14, 64;
stg %r14, STACK_DST(%r15);
lg POLY_RSRC, STACK_POSRC(%r15);
clgijhe NBLKS, 1, .Lloop1_poly;
.balign 4
.Ldone_poly:
/* Store poly1305 state */
lg POLY_RSTATE, STACK_POCTX(%r15);
POLY1305_STORE_STATE();
/* Store counter. */
lg INPUT, STACK_INPUT(%r15);
vperm S3, S3, S3, TMP0;
vst S3, (48)(INPUT);
/* Clear the used vector registers. */
CLEAR(A0);
CLEAR(A1);
CLEAR(A2);
CLEAR(A3);
CLEAR(IO0);
CLEAR(IO1);
CLEAR(IO2);
CLEAR(IO3);
CLEAR(IO4);
CLEAR(IO5);
CLEAR(IO6);
CLEAR(IO7);
CLEAR(TMP0);
CLEAR(TMP1);
CLEAR(TMP2);
END_STACK(%r14);
xgr %r2, %r2;
br %r14;
CFI_ENDPROC();
ELF(.size _gcry_chacha20_poly1305_s390x_vx_blocks4_2_1,
.-_gcry_chacha20_poly1305_s390x_vx_blocks4_2_1;)
/**********************************************************************
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 _gcry_chacha20_s390x_vx_blocks8
ELF(.type _gcry_chacha20_s390x_vx_blocks8,@function;)
_gcry_chacha20_s390x_vx_blocks8:
/* input:
* %r2: input
* %r3: dst
* %r4: src
* %r5: nblks (multiple of 8)
*/
CFI_STARTPROC();
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;
/* Clear the used vector registers. */
DST_8(CLEAR, 0, _);
DST_8(CLEAR, 1, _);
DST_8(CLEAR, 2, _);
DST_8(CLEAR, 3, _);
/* Clear sensitive data in stack. */
vlm Y0, Y15, STACK_Y0_Y15(%r15);
vlm Y0, Y3, STACK_CTR(%r15);
END_STACK(%r8);
xgr %r2, %r2;
br %r14;
CFI_ENDPROC();
ELF(.size _gcry_chacha20_s390x_vx_blocks8,
.-_gcry_chacha20_s390x_vx_blocks8;)
/**********************************************************************
8-way stitched chacha20-poly1305 ("vertical")
**********************************************************************/
.balign 8
.globl _gcry_chacha20_poly1305_s390x_vx_blocks8
ELF(.type _gcry_chacha20_poly1305_s390x_vx_blocks8,@function;)
_gcry_chacha20_poly1305_s390x_vx_blocks8:
/* input:
* %r2: input
* %r3: dst
* %r4: src
* %r5: nblks (multiple of 8)
* %r6: poly1305 state
* 160(%r15): poly1305 src
*/
CFI_STARTPROC();
START_STACK(%r14);
/* Store parameters to stack. */
stmg %r2, %r6, STACK_INPUT(%r15);
lgr POLY_RSTATE, %r6;
lgr NBLKS, %r5;
lg POLY_RSRC, 0(%r15);
lg POLY_RSRC, 160(POLY_RSRC);
stg POLY_RSRC, STACK_POSRC(%r15);
/* Load poly1305 state */
POLY1305_LOAD_STATE();
.balign 4
/* Process eight chacha20 blocks and 32 poly1305 blocks per loop. */
.Lloop8_poly:
lg INPUT, STACK_INPUT(%r15);
larl %r8, .Lconsts;
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)(%r8);
vl Y4, (.Ladd_counter_4567 - .Lconsts)(%r8);
lg %r8, (12 * 4)(INPUT); /* Update counter. */
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;
rllg %r8, %r8, 32;
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;
agfi %r8, 8;
/* Store counters for blocks 0-7. */
vstm X12, X13, (STACK_CTR + 0 * 16)(%r15);
vstm Y12, Y13, (STACK_CTR + 2 * 16)(%r15);
rllg %r8, %r8, 32;
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;
stg %r8, (12 * 4)(INPUT);
.balign 4
.Lround2_8_poly:
/* Total 30 poly1305 blocks processed by this loop. */
QUARTERROUND4_V8_POLY(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,
POLY1305_BLOCK_PART1(0 * 16),
POLY1305_BLOCK_PART2(),
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4(),
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6(),
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8(),
POLY1305_BLOCK_PART1(1 * 16),
POLY1305_BLOCK_PART2(),
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4());
QUARTERROUND4_V8_POLY(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,
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6(),
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8(),
POLY1305_BLOCK_PART1(2 * 16);
INC_POLY1305_SRC(3 * 16),
POLY1305_BLOCK_PART2(),
POLY1305_BLOCK_PART3(),
POLY1305_BLOCK_PART4(),
POLY1305_BLOCK_PART5(),
POLY1305_BLOCK_PART6(),
POLY1305_BLOCK_PART7(),
POLY1305_BLOCK_PART8());
brctg ROUND, .Lround2_8_poly;
POLY1305_BLOCK_PART1(0 * 16);
/* 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);
stg POLY_RSRC, STACK_POSRC(%r15); /* %r14 used for INPUT/SRC/DST pointer. */
lghi ROUND, 1;
j .Lfirst_output_4blks_8_poly;
.balign 4
.Lsecond_output_4blks_8_poly:
POLY1305_BLOCK_PART1(1 * 16);
/* 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);
INC_POLY1305_SRC(2 * 16);
stg POLY_RSRC, STACK_POSRC(%r15); /* %r14 used for INPUT/SRC/DST pointer. */
lghi ROUND, 0;
.balign 4
/* Output four chacha20 blocks and one poly1305 block per loop. */
.Lfirst_output_4blks_8_poly:
lg %r14, STACK_INPUT(%r15);
vlm Y12, Y15, 0(%r14);
POLY1305_BLOCK_PART2();
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;
POLY1305_BLOCK_PART3();
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);
POLY1305_BLOCK_PART4();
larl %r14, .Lconsts;
vl Y15, (.Lbswap32 - .Lconsts)(%r14);
TRANSPOSE_4X4_2(X0, X1, X2, X3, X4, X5, X6, X7,
Y9, Y10, Y11, Y12, Y13, Y14);
lg %r14, STACK_SRC(%r15);
POLY1305_BLOCK_PART5();
TRANSPOSE_4X4_2(X8, X9, X10, X11, X12, X13, X14, X15,
Y9, Y10, Y11, Y12, Y13, Y14);
vlm Y0, Y14, 0(%r14);
POLY1305_BLOCK_PART6();
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)(%r14);
POLY1305_BLOCK_PART7();
aghi %r14, 256;
stg %r14, STACK_SRC(%r15);
lg %r14, STACK_DST(%r15);
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);
POLY1305_BLOCK_PART8();
vstm Y0, Y15, 0(%r14);
aghi %r14, 256;
stg %r14, STACK_DST(%r15);
lg POLY_RSRC, STACK_POSRC(%r15);
clgije ROUND, 1, .Lsecond_output_4blks_8_poly;
clgijhe NBLKS, 8, .Lloop8_poly;
/* Store poly1305 state */
lg POLY_RSTATE, STACK_POCTX(%r15);
POLY1305_STORE_STATE();
/* Clear the used vector registers */
DST_8(CLEAR, 0, _);
DST_8(CLEAR, 1, _);
DST_8(CLEAR, 2, _);
DST_8(CLEAR, 3, _);
/* Clear sensitive data in stack. */
vlm Y0, Y15, STACK_Y0_Y15(%r15);
vlm Y0, Y3, STACK_CTR(%r15);
END_STACK(%r14);
xgr %r2, %r2;
br %r14;
CFI_ENDPROC();
ELF(.size _gcry_chacha20_poly1305_s390x_vx_blocks8,
.-_gcry_chacha20_poly1305_s390x_vx_blocks8;)
#endif /*HAVE_GCC_INLINE_ASM_S390X_VX*/
#endif /*__s390x__*/