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galois_ppc64le.s
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galois_ppc64le.s
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//+build !noasm !appengine !gccgo
// Copyright 2015, Klaus Post, see LICENSE for details.
// Copyright 2018, Minio, Inc.
#include "textflag.h"
#define LOW R3
#define HIGH R4
#define IN R5
#define LEN R6
#define OUT R7
#define CONSTANTS R8
#define OFFSET R9
#define OFFSET1 R10
#define OFFSET2 R11
#define X6 VS34
#define X6_ V2
#define X7 VS35
#define X7_ V3
#define MSG VS36
#define MSG_ V4
#define MSG_HI VS37
#define MSG_HI_ V5
#define RESULT VS38
#define RESULT_ V6
#define ROTATE VS39
#define ROTATE_ V7
#define MASK VS40
#define MASK_ V8
#define FLIP VS41
#define FLIP_ V9
// func galMulPpc(low, high, in, out []byte)
TEXT ·galMulPpc(SB), NOFRAME|NOSPLIT, $0-96
MOVD low+0(FP), LOW
MOVD high+24(FP), HIGH
MOVD in+48(FP), IN
MOVD in_len+56(FP), LEN
MOVD out+72(FP), OUT
MOVD $16, OFFSET1
MOVD $32, OFFSET2
MOVD $·constants(SB), CONSTANTS
LXVD2X (CONSTANTS)(R0), ROTATE
LXVD2X (CONSTANTS)(OFFSET1), MASK
LXVD2X (CONSTANTS)(OFFSET2), FLIP
LXVD2X (LOW)(R0), X6
LXVD2X (HIGH)(R0), X7
VPERM X6_, V31, FLIP_, X6_
VPERM X7_, V31, FLIP_, X7_
MOVD $0, OFFSET
loop:
LXVD2X (IN)(OFFSET), MSG
VSRB MSG_, ROTATE_, MSG_HI_
VAND MSG_, MASK_, MSG_
VPERM X6_, V31, MSG_, MSG_
VPERM X7_, V31, MSG_HI_, MSG_HI_
VXOR MSG_, MSG_HI_, MSG_
STXVD2X MSG, (OUT)(OFFSET)
ADD $16, OFFSET, OFFSET
CMP LEN, OFFSET
BGT loop
RET
// func galMulPpcXorlow, high, in, out []byte)
TEXT ·galMulPpcXor(SB), NOFRAME|NOSPLIT, $0-96
MOVD low+0(FP), LOW
MOVD high+24(FP), HIGH
MOVD in+48(FP), IN
MOVD in_len+56(FP), LEN
MOVD out+72(FP), OUT
MOVD $16, OFFSET1
MOVD $32, OFFSET2
MOVD $·constants(SB), CONSTANTS
LXVD2X (CONSTANTS)(R0), ROTATE
LXVD2X (CONSTANTS)(OFFSET1), MASK
LXVD2X (CONSTANTS)(OFFSET2), FLIP
LXVD2X (LOW)(R0), X6
LXVD2X (HIGH)(R0), X7
VPERM X6_, V31, FLIP_, X6_
VPERM X7_, V31, FLIP_, X7_
MOVD $0, OFFSET
loopXor:
LXVD2X (IN)(OFFSET), MSG
LXVD2X (OUT)(OFFSET), RESULT
VSRB MSG_, ROTATE_, MSG_HI_
VAND MSG_, MASK_, MSG_
VPERM X6_, V31, MSG_, MSG_
VPERM X7_, V31, MSG_HI_, MSG_HI_
VXOR MSG_, MSG_HI_, MSG_
VXOR MSG_, RESULT_, RESULT_
STXVD2X RESULT, (OUT)(OFFSET)
ADD $16, OFFSET, OFFSET
CMP LEN, OFFSET
BGT loopXor
RET
DATA ·constants+0x0(SB)/8, $0x0404040404040404
DATA ·constants+0x8(SB)/8, $0x0404040404040404
DATA ·constants+0x10(SB)/8, $0x0f0f0f0f0f0f0f0f
DATA ·constants+0x18(SB)/8, $0x0f0f0f0f0f0f0f0f
DATA ·constants+0x20(SB)/8, $0x0706050403020100
DATA ·constants+0x28(SB)/8, $0x0f0e0d0c0b0a0908
GLOBL ·constants(SB), 8, $48