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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//+build !noasm
//+build !appengine
//+build !gccgo
// func xorSlice(in, out []byte, v *[4]uint64)
TEXT ·xorSlice(SB), 7, $0
MOVQ v+48(FP), AX // AX: v
MOVQ in+0(FP), SI // SI: &in
MOVQ out+24(FP), DX // DX: &out
MOVQ out_len+32(FP), R9 // R9: len(out)
MOVOU (AX), X0 // v[x]
MOVOU 16(AX), X1 // v[x+2]
SHRQ $5, R9 // len(in) / 32
JZ done_xor_sse2_32
loopback_xor_sse2_32:
MOVOU (SI), X2 // in[x]
MOVOU 16(SI), X3 // in[x+16]
PXOR X0, X2
PXOR X1, X3
MOVOU X2, (DX)
MOVOU X3, 16(DX)
ADDQ $32, SI // in+=32
ADDQ $32, DX // out+=32
SUBQ $1, R9
JNZ loopback_xor_sse2_32
done_xor_sse2_32:
RET
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