1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
// Copyright 2009 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.
//go:build !math_big_pure_go
// +build !math_big_pure_go
#include "textflag.h"
// This file provides fast assembly versions for the elementary
// arithmetic operations on vectors implemented in arith.go.
// func mulWW(x, y Word) (z1, z0 Word)
TEXT ·mulWW(SB),NOSPLIT,$0
MOVL x+0(FP), AX
MULL y+4(FP)
MOVL DX, z1+8(FP)
MOVL AX, z0+12(FP)
RET
// func addVV(z, x, y []Word) (c Word)
TEXT ·addVV(SB),NOSPLIT,$0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL y+24(FP), CX
MOVL z_len+4(FP), BP
MOVL $0, BX // i = 0
MOVL $0, DX // c = 0
JMP E1
L1: MOVL (SI)(BX*4), AX
ADDL DX, DX // restore CF
ADCL (CX)(BX*4), AX
SBBL DX, DX // save CF
MOVL AX, (DI)(BX*4)
ADDL $1, BX // i++
E1: CMPL BX, BP // i < n
JL L1
NEGL DX
MOVL DX, c+36(FP)
RET
// func subVV(z, x, y []Word) (c Word)
// (same as addVV except for SBBL instead of ADCL and label names)
TEXT ·subVV(SB),NOSPLIT,$0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL y+24(FP), CX
MOVL z_len+4(FP), BP
MOVL $0, BX // i = 0
MOVL $0, DX // c = 0
JMP E2
L2: MOVL (SI)(BX*4), AX
ADDL DX, DX // restore CF
SBBL (CX)(BX*4), AX
SBBL DX, DX // save CF
MOVL AX, (DI)(BX*4)
ADDL $1, BX // i++
E2: CMPL BX, BP // i < n
JL L2
NEGL DX
MOVL DX, c+36(FP)
RET
// func addVW(z, x []Word, y Word) (c Word)
TEXT ·addVW(SB),NOSPLIT,$0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL y+24(FP), AX // c = y
MOVL z_len+4(FP), BP
MOVL $0, BX // i = 0
JMP E3
L3: ADDL (SI)(BX*4), AX
MOVL AX, (DI)(BX*4)
SBBL AX, AX // save CF
NEGL AX
ADDL $1, BX // i++
E3: CMPL BX, BP // i < n
JL L3
MOVL AX, c+28(FP)
RET
// func subVW(z, x []Word, y Word) (c Word)
TEXT ·subVW(SB),NOSPLIT,$0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL y+24(FP), AX // c = y
MOVL z_len+4(FP), BP
MOVL $0, BX // i = 0
JMP E4
L4: MOVL (SI)(BX*4), DX
SUBL AX, DX
MOVL DX, (DI)(BX*4)
SBBL AX, AX // save CF
NEGL AX
ADDL $1, BX // i++
E4: CMPL BX, BP // i < n
JL L4
MOVL AX, c+28(FP)
RET
// func shlVU(z, x []Word, s uint) (c Word)
TEXT ·shlVU(SB),NOSPLIT,$0
MOVL z_len+4(FP), BX // i = z
SUBL $1, BX // i--
JL X8b // i < 0 (n <= 0)
// n > 0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL s+24(FP), CX
MOVL (SI)(BX*4), AX // w1 = x[n-1]
MOVL $0, DX
SHLL CX, AX, DX // w1>>ŝ
MOVL DX, c+28(FP)
CMPL BX, $0
JLE X8a // i <= 0
// i > 0
L8: MOVL AX, DX // w = w1
MOVL -4(SI)(BX*4), AX // w1 = x[i-1]
SHLL CX, AX, DX // w<<s | w1>>ŝ
MOVL DX, (DI)(BX*4) // z[i] = w<<s | w1>>ŝ
SUBL $1, BX // i--
JG L8 // i > 0
// i <= 0
X8a: SHLL CX, AX // w1<<s
MOVL AX, (DI) // z[0] = w1<<s
RET
X8b: MOVL $0, c+28(FP)
RET
// func shrVU(z, x []Word, s uint) (c Word)
TEXT ·shrVU(SB),NOSPLIT,$0
MOVL z_len+4(FP), BP
SUBL $1, BP // n--
JL X9b // n < 0 (n <= 0)
// n > 0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL s+24(FP), CX
MOVL (SI), AX // w1 = x[0]
MOVL $0, DX
SHRL CX, AX, DX // w1<<ŝ
MOVL DX, c+28(FP)
MOVL $0, BX // i = 0
JMP E9
// i < n-1
L9: MOVL AX, DX // w = w1
MOVL 4(SI)(BX*4), AX // w1 = x[i+1]
SHRL CX, AX, DX // w>>s | w1<<ŝ
MOVL DX, (DI)(BX*4) // z[i] = w>>s | w1<<ŝ
ADDL $1, BX // i++
E9: CMPL BX, BP
JL L9 // i < n-1
// i >= n-1
X9a: SHRL CX, AX // w1>>s
MOVL AX, (DI)(BP*4) // z[n-1] = w1>>s
RET
X9b: MOVL $0, c+28(FP)
RET
// func mulAddVWW(z, x []Word, y, r Word) (c Word)
TEXT ·mulAddVWW(SB),NOSPLIT,$0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL y+24(FP), BP
MOVL r+28(FP), CX // c = r
MOVL z_len+4(FP), BX
LEAL (DI)(BX*4), DI
LEAL (SI)(BX*4), SI
NEGL BX // i = -n
JMP E5
L5: MOVL (SI)(BX*4), AX
MULL BP
ADDL CX, AX
ADCL $0, DX
MOVL AX, (DI)(BX*4)
MOVL DX, CX
ADDL $1, BX // i++
E5: CMPL BX, $0 // i < 0
JL L5
MOVL CX, c+32(FP)
RET
// func addMulVVW(z, x []Word, y Word) (c Word)
TEXT ·addMulVVW(SB),NOSPLIT,$0
MOVL z+0(FP), DI
MOVL x+12(FP), SI
MOVL y+24(FP), BP
MOVL z_len+4(FP), BX
LEAL (DI)(BX*4), DI
LEAL (SI)(BX*4), SI
NEGL BX // i = -n
MOVL $0, CX // c = 0
JMP E6
L6: MOVL (SI)(BX*4), AX
MULL BP
ADDL CX, AX
ADCL $0, DX
ADDL AX, (DI)(BX*4)
ADCL $0, DX
MOVL DX, CX
ADDL $1, BX // i++
E6: CMPL BX, $0 // i < 0
JL L6
MOVL CX, c+28(FP)
RET
|
