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/* poly1305-s390x.S - zSeries implementation of Poly1305
*
* 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)
#include "asm-poly1305-s390x.h"
.text
.balign 8
.globl _gcry_poly1305_s390x_blocks1
ELF(.type _gcry_poly1305_s390x_blocks1,@function;)
_gcry_poly1305_s390x_blocks1:
/* input:
* %r2: poly1305-state
* %r3: src
* %r4: len
* %r5: high_pad
*/
CFI_STARTPROC();
stmg %r6, %r14, 6 * 8(%r15);
lgr POLY_RSTATE, %r2;
lgr POLY_RSRC, %r3;
srlg %r0, %r4, 4;
cgije %r5, 0, .Lpoly_high0;
POLY1305_LOAD_STATE();
.balign 4
.Lpoly_loop_high1:
POLY1305_BLOCK_PART1(0 * 16);
INC_POLY1305_SRC(1 * 16);
.Lpoly_block_part2:
POLY1305_BLOCK_PART2();
POLY1305_BLOCK_PART3();
POLY1305_BLOCK_PART4();
POLY1305_BLOCK_PART5();
POLY1305_BLOCK_PART6();
POLY1305_BLOCK_PART7();
POLY1305_BLOCK_PART8();
brctg %r0, .Lpoly_loop_high1;
.balign 4
.Lpoly_done:
POLY1305_STORE_STATE();
lmg %r6, %r14, 6 * 8(%r15);
xgr %r2, %r2;
br %r14;
.balign 4
.Lpoly_high0:
lghi %r0, 1;
POLY1305_LOAD_STATE();
POLY1305_BLOCK_PART1_HB(0 * 16, 0);
j .Lpoly_block_part2;
CFI_ENDPROC();
ELF(.size _gcry_poly1305_s390x_blocks1,
.-_gcry_poly1305_s390x_blocks1;)
#endif /*HAVE_GCC_INLINE_ASM_S390X*/
#endif /*__s390x__*/