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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
|
;
; mpi_x86.asm - assembly language implementation of s_mpv_ functions.
;
; ***** BEGIN LICENSE BLOCK *****
; Version: MPL 1.1/GPL 2.0/LGPL 2.1
;
; The contents of this file are subject to the Mozilla Public License Version
; 1.1 (the "License"); you may not use this file except in compliance with
; the License. You may obtain a copy of the License at
; http://www.mozilla.org/MPL/
;
; Software distributed under the License is distributed on an "AS IS" basis,
; WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
; for the specific language governing rights and limitations under the
; License.
;
; The Original Code is the Netscape security libraries.
;
; The Initial Developer of the Original Code is
; Netscape Communications Corporation.
; Portions created by the Initial Developer are Copyright (C) 2000
; the Initial Developer. All Rights Reserved.
;
; Contributor(s):
;
; Alternatively, the contents of this file may be used under the terms of
; either the GNU General Public License Version 2 or later (the "GPL"), or
; the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
; in which case the provisions of the GPL or the LGPL are applicable instead
; of those above. If you wish to allow use of your version of this file only
; under the terms of either the GPL or the LGPL, and not to allow others to
; use your version of this file under the terms of the MPL, indicate your
; decision by deleting the provisions above and replace them with the notice
; and other provisions required by the GPL or the LGPL. If you do not delete
; the provisions above, a recipient may use your version of this file under
; the terms of any one of the MPL, the GPL or the LGPL.
;
; ***** END LICENSE BLOCK *****
; $Id$
.386p
.MODEL FLAT
ASSUME CS: FLAT, DS: FLAT, SS: FLAT
_TEXT SEGMENT
; ebp - 36: caller's esi
; ebp - 32: caller's edi
; ebp - 28:
; ebp - 24:
; ebp - 20:
; ebp - 16:
; ebp - 12:
; ebp - 8:
; ebp - 4:
; ebp + 0: caller's ebp
; ebp + 4: return address
; ebp + 8: a argument
; ebp + 12: a_len argument
; ebp + 16: b argument
; ebp + 20: c argument
; registers:
; eax:
; ebx: carry
; ecx: a_len
; edx:
; esi: a ptr
; edi: c ptr
public _s_mpv_mul_d
_s_mpv_mul_d PROC NEAR
push ebp
mov ebp,esp
sub esp,28
push edi
push esi
push ebx
mov ebx,0 ; carry = 0
mov ecx,[ebp+12] ; ecx = a_len
mov edi,[ebp+20]
cmp ecx,0
je L_2 ; jmp if a_len == 0
mov esi,[ebp+8] ; esi = a
cld
L_1:
lodsd ; eax = [ds:esi]; esi += 4
mov edx,[ebp+16] ; edx = b
mul edx ; edx:eax = Phi:Plo = a_i * b
add eax,ebx ; add carry (ebx) to edx:eax
adc edx,0
mov ebx,edx ; high half of product becomes next carry
stosd ; [es:edi] = ax; edi += 4;
dec ecx ; --a_len
jnz L_1 ; jmp if a_len != 0
L_2:
mov [edi],ebx ; *c = carry
pop ebx
pop esi
pop edi
leave
ret
nop
_s_mpv_mul_d ENDP
; ebp - 36: caller's esi
; ebp - 32: caller's edi
; ebp - 28:
; ebp - 24:
; ebp - 20:
; ebp - 16:
; ebp - 12:
; ebp - 8:
; ebp - 4:
; ebp + 0: caller's ebp
; ebp + 4: return address
; ebp + 8: a argument
; ebp + 12: a_len argument
; ebp + 16: b argument
; ebp + 20: c argument
; registers:
; eax:
; ebx: carry
; ecx: a_len
; edx:
; esi: a ptr
; edi: c ptr
public _s_mpv_mul_d_add
_s_mpv_mul_d_add PROC NEAR
push ebp
mov ebp,esp
sub esp,28
push edi
push esi
push ebx
mov ebx,0 ; carry = 0
mov ecx,[ebp+12] ; ecx = a_len
mov edi,[ebp+20]
cmp ecx,0
je L_4 ; jmp if a_len == 0
mov esi,[ebp+8] ; esi = a
cld
L_3:
lodsd ; eax = [ds:esi]; esi += 4
mov edx,[ebp+16] ; edx = b
mul edx ; edx:eax = Phi:Plo = a_i * b
add eax,ebx ; add carry (ebx) to edx:eax
adc edx,0
mov ebx,[edi] ; add in current word from *c
add eax,ebx
adc edx,0
mov ebx,edx ; high half of product becomes next carry
stosd ; [es:edi] = ax; edi += 4;
dec ecx ; --a_len
jnz L_3 ; jmp if a_len != 0
L_4:
mov [edi],ebx ; *c = carry
pop ebx
pop esi
pop edi
leave
ret
nop
_s_mpv_mul_d_add ENDP
; ebp - 36: caller's esi
; ebp - 32: caller's edi
; ebp - 28:
; ebp - 24:
; ebp - 20:
; ebp - 16:
; ebp - 12:
; ebp - 8:
; ebp - 4:
; ebp + 0: caller's ebp
; ebp + 4: return address
; ebp + 8: a argument
; ebp + 12: a_len argument
; ebp + 16: b argument
; ebp + 20: c argument
; registers:
; eax:
; ebx: carry
; ecx: a_len
; edx:
; esi: a ptr
; edi: c ptr
public _s_mpv_mul_d_add_prop
_s_mpv_mul_d_add_prop PROC NEAR
push ebp
mov ebp,esp
sub esp,28
push edi
push esi
push ebx
mov ebx,0 ; carry = 0
mov ecx,[ebp+12] ; ecx = a_len
mov edi,[ebp+20]
cmp ecx,0
je L_6 ; jmp if a_len == 0
cld
mov esi,[ebp+8] ; esi = a
L_5:
lodsd ; eax = [ds:esi]; esi += 4
mov edx,[ebp+16] ; edx = b
mul edx ; edx:eax = Phi:Plo = a_i * b
add eax,ebx ; add carry (ebx) to edx:eax
adc edx,0
mov ebx,[edi] ; add in current word from *c
add eax,ebx
adc edx,0
mov ebx,edx ; high half of product becomes next carry
stosd ; [es:edi] = ax; edi += 4;
dec ecx ; --a_len
jnz L_5 ; jmp if a_len != 0
L_6:
cmp ebx,0 ; is carry zero?
jz L_8
mov eax,[edi] ; add in current word from *c
add eax,ebx
stosd ; [es:edi] = ax; edi += 4;
jnc L_8
L_7:
mov eax,[edi] ; add in current word from *c
adc eax,0
stosd ; [es:edi] = ax; edi += 4;
jc L_7
L_8:
pop ebx
pop esi
pop edi
leave
ret
nop
_s_mpv_mul_d_add_prop ENDP
; ebp - 20: caller's esi
; ebp - 16: caller's edi
; ebp - 12:
; ebp - 8: carry
; ebp - 4: a_len local
; ebp + 0: caller's ebp
; ebp + 4: return address
; ebp + 8: pa argument
; ebp + 12: a_len argument
; ebp + 16: ps argument
; ebp + 20:
; registers:
; eax:
; ebx: carry
; ecx: a_len
; edx:
; esi: a ptr
; edi: c ptr
public _s_mpv_sqr_add_prop
_s_mpv_sqr_add_prop PROC NEAR
push ebp
mov ebp,esp
sub esp,12
push edi
push esi
push ebx
mov ebx,0 ; carry = 0
mov ecx,[ebp+12] ; a_len
mov edi,[ebp+16] ; edi = ps
cmp ecx,0
je L_11 ; jump if a_len == 0
cld
mov esi,[ebp+8] ; esi = pa
L_10:
lodsd ; eax = [ds:si]; si += 4;
mul eax
add eax,ebx ; add "carry"
adc edx,0
mov ebx,[edi]
add eax,ebx ; add low word from result
mov ebx,[edi+4]
stosd ; [es:di] = eax; di += 4;
adc edx,ebx ; add high word from result
mov ebx,0
mov eax,edx
adc ebx,0
stosd ; [es:di] = eax; di += 4;
dec ecx ; --a_len
jnz L_10 ; jmp if a_len != 0
L_11:
cmp ebx,0 ; is carry zero?
jz L_14
mov eax,[edi] ; add in current word from *c
add eax,ebx
stosd ; [es:edi] = ax; edi += 4;
jnc L_14
L_12:
mov eax,[edi] ; add in current word from *c
adc eax,0
stosd ; [es:edi] = ax; edi += 4;
jc L_12
L_14:
pop ebx
pop esi
pop edi
leave
ret
nop
_s_mpv_sqr_add_prop ENDP
;
; Divide 64-bit (Nhi,Nlo) by 32-bit divisor, which must be normalized
; so its high bit is 1. This code is from NSPR.
;
; mp_err s_mpv_div_2dx1d(mp_digit Nhi, mp_digit Nlo, mp_digit divisor,
; mp_digit *qp, mp_digit *rp)
; Dump of assembler code for function s_mpv_div_2dx1d:
;
; esp + 0: Caller's ebx
; esp + 4: return address
; esp + 8: Nhi argument
; esp + 12: Nlo argument
; esp + 16: divisor argument
; esp + 20: qp argument
; esp + 24: rp argument
; registers:
; eax:
; ebx: carry
; ecx: a_len
; edx:
; esi: a ptr
; edi: c ptr
;
public _s_mpv_div_2dx1d
_s_mpv_div_2dx1d PROC NEAR
push ebx
mov edx,[esp+8]
mov eax,[esp+12]
mov ebx,[esp+16]
div ebx
mov ebx,[esp+20]
mov [ebx],eax
mov ebx,[esp+24]
mov [ebx],edx
xor eax,eax ; return zero
pop ebx
ret
nop
_s_mpv_div_2dx1d ENDP
_TEXT ENDS
END
|