109 lines
2.5 KiB
ArmAsm
Vendored
109 lines
2.5 KiB
ArmAsm
Vendored
// Copyright 2012 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build gc,!purego
|
|
|
|
#include "textflag.h"
|
|
|
|
#define POLY1305_ADD(msg, h0, h1, h2) \
|
|
ADDQ 0(msg), h0; \
|
|
ADCQ 8(msg), h1; \
|
|
ADCQ $1, h2; \
|
|
LEAQ 16(msg), msg
|
|
|
|
#define POLY1305_MUL(h0, h1, h2, r0, r1, t0, t1, t2, t3) \
|
|
MOVQ r0, AX; \
|
|
MULQ h0; \
|
|
MOVQ AX, t0; \
|
|
MOVQ DX, t1; \
|
|
MOVQ r0, AX; \
|
|
MULQ h1; \
|
|
ADDQ AX, t1; \
|
|
ADCQ $0, DX; \
|
|
MOVQ r0, t2; \
|
|
IMULQ h2, t2; \
|
|
ADDQ DX, t2; \
|
|
\
|
|
MOVQ r1, AX; \
|
|
MULQ h0; \
|
|
ADDQ AX, t1; \
|
|
ADCQ $0, DX; \
|
|
MOVQ DX, h0; \
|
|
MOVQ r1, t3; \
|
|
IMULQ h2, t3; \
|
|
MOVQ r1, AX; \
|
|
MULQ h1; \
|
|
ADDQ AX, t2; \
|
|
ADCQ DX, t3; \
|
|
ADDQ h0, t2; \
|
|
ADCQ $0, t3; \
|
|
\
|
|
MOVQ t0, h0; \
|
|
MOVQ t1, h1; \
|
|
MOVQ t2, h2; \
|
|
ANDQ $3, h2; \
|
|
MOVQ t2, t0; \
|
|
ANDQ $0xFFFFFFFFFFFFFFFC, t0; \
|
|
ADDQ t0, h0; \
|
|
ADCQ t3, h1; \
|
|
ADCQ $0, h2; \
|
|
SHRQ $2, t3, t2; \
|
|
SHRQ $2, t3; \
|
|
ADDQ t2, h0; \
|
|
ADCQ t3, h1; \
|
|
ADCQ $0, h2
|
|
|
|
// func update(state *[7]uint64, msg []byte)
|
|
TEXT ·update(SB), $0-32
|
|
MOVQ state+0(FP), DI
|
|
MOVQ msg_base+8(FP), SI
|
|
MOVQ msg_len+16(FP), R15
|
|
|
|
MOVQ 0(DI), R8 // h0
|
|
MOVQ 8(DI), R9 // h1
|
|
MOVQ 16(DI), R10 // h2
|
|
MOVQ 24(DI), R11 // r0
|
|
MOVQ 32(DI), R12 // r1
|
|
|
|
CMPQ R15, $16
|
|
JB bytes_between_0_and_15
|
|
|
|
loop:
|
|
POLY1305_ADD(SI, R8, R9, R10)
|
|
|
|
multiply:
|
|
POLY1305_MUL(R8, R9, R10, R11, R12, BX, CX, R13, R14)
|
|
SUBQ $16, R15
|
|
CMPQ R15, $16
|
|
JAE loop
|
|
|
|
bytes_between_0_and_15:
|
|
TESTQ R15, R15
|
|
JZ done
|
|
MOVQ $1, BX
|
|
XORQ CX, CX
|
|
XORQ R13, R13
|
|
ADDQ R15, SI
|
|
|
|
flush_buffer:
|
|
SHLQ $8, BX, CX
|
|
SHLQ $8, BX
|
|
MOVB -1(SI), R13
|
|
XORQ R13, BX
|
|
DECQ SI
|
|
DECQ R15
|
|
JNZ flush_buffer
|
|
|
|
ADDQ BX, R8
|
|
ADCQ CX, R9
|
|
ADCQ $0, R10
|
|
MOVQ $16, R15
|
|
JMP multiply
|
|
|
|
done:
|
|
MOVQ R8, 0(DI)
|
|
MOVQ R9, 8(DI)
|
|
MOVQ R10, 16(DI)
|
|
RET
|