1 #!/usr/local/bin/perl
2
3 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
4 push(@INC,"${dir}","${dir}../../perlasm");
5 require "x86asm.pl";
6
7 &asm_init($ARGV[0],$0);
8
9 $sse2=0;
10 for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
11
12 &external_label("OPENSSL_ia32cap_P") if ($sse2);
13
14 &bn_mul_add_words("bn_mul_add_words");
15 &bn_mul_words("bn_mul_words");
16 &bn_sqr_words("bn_sqr_words");
17 &bn_div_words("bn_div_words");
18 &bn_add_words("bn_add_words");
19 &bn_sub_words("bn_sub_words");
20 &bn_sub_part_words("bn_sub_part_words");
21
22 &asm_finish();
23
24 sub bn_mul_add_words
25 {
26 local($name)=@_;
27
28 &function_begin_B($name,$sse2?"EXTRN\t_OPENSSL_ia32cap_P:DWORD":"");
29
30 $r="eax";
31 $a="edx";
32 $c="ecx";
33
34 if ($sse2) {
35 &picmeup("eax","OPENSSL_ia32cap_P");
36 &bt(&DWP(0,"eax"),26);
37 &jnc(&label("maw_non_sse2"));
38
39 &mov($r,&wparam(0));
40 &mov($a,&wparam(1));
41 &mov($c,&wparam(2));
42 &movd("mm0",&wparam(3)); # mm0 = w
43 &pxor("mm1","mm1"); # mm1 = carry_in
44 &jmp(&label("maw_sse2_entry"));
45
46 &set_label("maw_sse2_unrolled",16);
47 &movd("mm3",&DWP(0,$r,"",0)); # mm3 = r[0]
48 &paddq("mm1","mm3"); # mm1 = carry_in + r[0]
49 &movd("mm2",&DWP(0,$a,"",0)); # mm2 = a[0]
50 &pmuludq("mm2","mm0"); # mm2 = w*a[0]
51 &movd("mm4",&DWP(4,$a,"",0)); # mm4 = a[1]
52 &pmuludq("mm4","mm0"); # mm4 = w*a[1]
53 &movd("mm6",&DWP(8,$a,"",0)); # mm6 = a[2]
54 &pmuludq("mm6","mm0"); # mm6 = w*a[2]
55 &movd("mm7",&DWP(12,$a,"",0)); # mm7 = a[3]
56 &pmuludq("mm7","mm0"); # mm7 = w*a[3]
57 &paddq("mm1","mm2"); # mm1 = carry_in + r[0] + w*a[0]
58 &movd("mm3",&DWP(4,$r,"",0)); # mm3 = r[1]
59 &paddq("mm3","mm4"); # mm3 = r[1] + w*a[1]
60 &movd("mm5",&DWP(8,$r,"",0)); # mm5 = r[2]
61 &paddq("mm5","mm6"); # mm5 = r[2] + w*a[2]
62 &movd("mm4",&DWP(12,$r,"",0)); # mm4 = r[3]
63 &paddq("mm7","mm4"); # mm7 = r[3] + w*a[3]
64 &movd(&DWP(0,$r,"",0),"mm1");
65 &movd("mm2",&DWP(16,$a,"",0)); # mm2 = a[4]
66 &pmuludq("mm2","mm0"); # mm2 = w*a[4]
67 &psrlq("mm1",32); # mm1 = carry0
68 &movd("mm4",&DWP(20,$a,"",0)); # mm4 = a[5]
69 &pmuludq("mm4","mm0"); # mm4 = w*a[5]
70 &paddq("mm1","mm3"); # mm1 = carry0 + r[1] + w*a[1]
71 &movd("mm6",&DWP(24,$a,"",0)); # mm6 = a[6]
72 &pmuludq("mm6","mm0"); # mm6 = w*a[6]
73 &movd(&DWP(4,$r,"",0),"mm1");
74 &psrlq("mm1",32); # mm1 = carry1
75 &movd("mm3",&DWP(28,$a,"",0)); # mm3 = a[7]
76 &add($a,32);
77 &pmuludq("mm3","mm0"); # mm3 = w*a[7]
78 &paddq("mm1","mm5"); # mm1 = carry1 + r[2] + w*a[2]
79 &movd("mm5",&DWP(16,$r,"",0)); # mm5 = r[4]
80 &paddq("mm2","mm5"); # mm2 = r[4] + w*a[4]
81 &movd(&DWP(8,$r,"",0),"mm1");
82 &psrlq("mm1",32); # mm1 = carry2
83 &paddq("mm1","mm7"); # mm1 = carry2 + r[3] + w*a[3]
84 &movd("mm5",&DWP(20,$r,"",0)); # mm5 = r[5]
85 &paddq("mm4","mm5"); # mm4 = r[5] + w*a[5]
86 &movd(&DWP(12,$r,"",0),"mm1");
87 &psrlq("mm1",32); # mm1 = carry3
88 &paddq("mm1","mm2"); # mm1 = carry3 + r[4] + w*a[4]
89 &movd("mm5",&DWP(24,$r,"",0)); # mm5 = r[6]
90 &paddq("mm6","mm5"); # mm6 = r[6] + w*a[6]
91 &movd(&DWP(16,$r,"",0),"mm1");
92 &psrlq("mm1",32); # mm1 = carry4
93 &paddq("mm1","mm4"); # mm1 = carry4 + r[5] + w*a[5]
94 &movd("mm5",&DWP(28,$r,"",0)); # mm5 = r[7]
95 &paddq("mm3","mm5"); # mm3 = r[7] + w*a[7]
96 &movd(&DWP(20,$r,"",0),"mm1");
97 &psrlq("mm1",32); # mm1 = carry5
98 &paddq("mm1","mm6"); # mm1 = carry5 + r[6] + w*a[6]
99 &movd(&DWP(24,$r,"",0),"mm1");
100 &psrlq("mm1",32); # mm1 = carry6
101 &paddq("mm1","mm3"); # mm1 = carry6 + r[7] + w*a[7]
102 &movd(&DWP(28,$r,"",0),"mm1");
103 &lea($r,&DWP(32,$r));
104 &psrlq("mm1",32); # mm1 = carry_out
105
106 &sub($c,8);
107 &jz(&label("maw_sse2_exit"));
108 &set_label("maw_sse2_entry");
109 &test($c,0xfffffff8);
110 &jnz(&label("maw_sse2_unrolled"));
111
112 &set_label("maw_sse2_loop",4);
113 &movd("mm2",&DWP(0,$a)); # mm2 = a[i]
114 &movd("mm3",&DWP(0,$r)); # mm3 = r[i]
115 &pmuludq("mm2","mm0"); # a[i] *= w
116 &lea($a,&DWP(4,$a));
117 &paddq("mm1","mm3"); # carry += r[i]
118 &paddq("mm1","mm2"); # carry += a[i]*w
119 &movd(&DWP(0,$r),"mm1"); # r[i] = carry_low
120 &sub($c,1);
121 &psrlq("mm1",32); # carry = carry_high
122 &lea($r,&DWP(4,$r));
123 &jnz(&label("maw_sse2_loop"));
124 &set_label("maw_sse2_exit");
125 &movd("eax","mm1"); # c = carry_out
126 &emms();
127 &ret();
128
129 &set_label("maw_non_sse2",16);
130 }
131
132 # function_begin prologue
133 &push("ebp");
134 &push("ebx");
135 &push("esi");
136 &push("edi");
137
138 &comment("");
139 $Low="eax";
140 $High="edx";
141 $a="ebx";
142 $w="ebp";
143 $r="edi";
144 $c="esi";
145
146 &xor($c,$c); # clear carry
147 &mov($r,&wparam(0)); #
148
149 &mov("ecx",&wparam(2)); #
150 &mov($a,&wparam(1)); #
151
152 &and("ecx",0xfffffff8); # num / 8
153 &mov($w,&wparam(3)); #
154
155 &push("ecx"); # Up the stack for a tmp variable
156
157 &jz(&label("maw_finish"));
158
159 &set_label("maw_loop",16);
160
161 for ($i=0; $i<32; $i+=4)
162 {
163 &comment("Round $i");
164
165 &mov("eax",&DWP($i,$a)); # *a
166 &mul($w); # *a * w
167 &add("eax",$c); # L(t)+= c
168 &adc("edx",0); # H(t)+=carry
169 &add("eax",&DWP($i,$r)); # L(t)+= *r
170 &adc("edx",0); # H(t)+=carry
171 &mov(&DWP($i,$r),"eax"); # *r= L(t);
172 &mov($c,"edx"); # c= H(t);
173 }
174
175 &comment("");
176 &sub("ecx",8);
177 &lea($a,&DWP(32,$a));
178 &lea($r,&DWP(32,$r));
179 &jnz(&label("maw_loop"));
180
181 &set_label("maw_finish",0);
182 &mov("ecx",&wparam(2)); # get num
183 &and("ecx",7);
184 &jnz(&label("maw_finish2")); # helps branch prediction
185 &jmp(&label("maw_end"));
186
187 &set_label("maw_finish2",1);
188 for ($i=0; $i<7; $i++)
189 {
190 &comment("Tail Round $i");
191 &mov("eax",&DWP($i*4,$a)); # *a
192 &mul($w); # *a * w
193 &add("eax",$c); # L(t)+=c
194 &adc("edx",0); # H(t)+=carry
195 &add("eax",&DWP($i*4,$r)); # L(t)+= *r
196 &adc("edx",0); # H(t)+=carry
197 &dec("ecx") if ($i != 7-1);
198 &mov(&DWP($i*4,$r),"eax"); # *r= L(t);
199 &mov($c,"edx"); # c= H(t);
200 &jz(&label("maw_end")) if ($i != 7-1);
201 }
202 &set_label("maw_end",0);
203 &mov("eax",$c);
204
205 &pop("ecx"); # clear variable from
206
207 &function_end($name);
208 }
209
210 sub bn_mul_words
211 {
212 local($name)=@_;
213
214 &function_begin_B($name,$sse2?"EXTRN\t_OPENSSL_ia32cap_P:DWORD":"");
215
216 $r="eax";
217 $a="edx";
218 $c="ecx";
219
220 if ($sse2) {
221 &picmeup("eax","OPENSSL_ia32cap_P");
222 &bt(&DWP(0,"eax"),26);
223 &jnc(&label("mw_non_sse2"));
224
225 &mov($r,&wparam(0));
226 &mov($a,&wparam(1));
227 &mov($c,&wparam(2));
228 &movd("mm0",&wparam(3)); # mm0 = w
229 &pxor("mm1","mm1"); # mm1 = carry = 0
230
231 &set_label("mw_sse2_loop",16);
232 &movd("mm2",&DWP(0,$a)); # mm2 = a[i]
233 &pmuludq("mm2","mm0"); # a[i] *= w
234 &lea($a,&DWP(4,$a));
235 &paddq("mm1","mm2"); # carry += a[i]*w
236 &movd(&DWP(0,$r),"mm1"); # r[i] = carry_low
237 &sub($c,1);
238 &psrlq("mm1",32); # carry = carry_high
239 &lea($r,&DWP(4,$r));
240 &jnz(&label("mw_sse2_loop"));
241
242 &movd("eax","mm1"); # return carry
243 &emms();
244 &ret();
245 &set_label("mw_non_sse2",16);
246 }
247
248 # function_begin prologue
249 &push("ebp");
250 &push("ebx");
251 &push("esi");
252 &push("edi");
253
254 &comment("");
255 $Low="eax";
256 $High="edx";
257 $a="ebx";
258 $w="ecx";
259 $r="edi";
260 $c="esi";
261 $num="ebp";
262
263 &xor($c,$c); # clear carry
264 &mov($r,&wparam(0)); #
265 &mov($a,&wparam(1)); #
266 &mov($num,&wparam(2)); #
267 &mov($w,&wparam(3)); #
268
269 &and($num,0xfffffff8); # num / 8
270 &jz(&label("mw_finish"));
271
272 &set_label("mw_loop",0);
273 for ($i=0; $i<32; $i+=4)
274 {
275 &comment("Round $i");
276
277 &mov("eax",&DWP($i,$a,"",0)); # *a
278 &mul($w); # *a * w
279 &add("eax",$c); # L(t)+=c
280 # XXX
281
282 &adc("edx",0); # H(t)+=carry
283 &mov(&DWP($i,$r,"",0),"eax"); # *r= L(t);
284
285 &mov($c,"edx"); # c= H(t);
286 }
287
288 &comment("");
289 &add($a,32);
290 &add($r,32);
291 &sub($num,8);
292 &jz(&label("mw_finish"));
293 &jmp(&label("mw_loop"));
294
295 &set_label("mw_finish",0);
296 &mov($num,&wparam(2)); # get num
297 &and($num,7);
298 &jnz(&label("mw_finish2"));
299 &jmp(&label("mw_end"));
300
301 &set_label("mw_finish2",1);
302 for ($i=0; $i<7; $i++)
303 {
304 &comment("Tail Round $i");
305 &mov("eax",&DWP($i*4,$a,"",0));# *a
306 &mul($w); # *a * w
307 &add("eax",$c); # L(t)+=c
308 # XXX
309 &adc("edx",0); # H(t)+=carry
310 &mov(&DWP($i*4,$r,"",0),"eax");# *r= L(t);
311 &mov($c,"edx"); # c= H(t);
312 &dec($num) if ($i != 7-1);
313 &jz(&label("mw_end")) if ($i != 7-1);
314 }
315 &set_label("mw_end",0);
316 &mov("eax",$c);
317
318 &function_end($name);
319 }
320
321 sub bn_sqr_words
322 {
323 local($name)=@_;
324
325 &function_begin_B($name,$sse2?"EXTRN\t_OPENSSL_ia32cap_P:DWORD":"");
326
327 $r="eax";
328 $a="edx";
329 $c="ecx";
330
331 if ($sse2) {
332 &picmeup("eax","OPENSSL_ia32cap_P");
333 &bt(&DWP(0,"eax"),26);
334 &jnc(&label("sqr_non_sse2"));
335
336 &mov($r,&wparam(0));
337 &mov($a,&wparam(1));
338 &mov($c,&wparam(2));
339
340 &set_label("sqr_sse2_loop",16);
341 &movd("mm0",&DWP(0,$a)); # mm0 = a[i]
342 &pmuludq("mm0","mm0"); # a[i] *= a[i]
343 &lea($a,&DWP(4,$a)); # a++
344 &movq(&QWP(0,$r),"mm0"); # r[i] = a[i]*a[i]
345 &sub($c,1);
346 &lea($r,&DWP(8,$r)); # r += 2
347 &jnz(&label("sqr_sse2_loop"));
348
349 &emms();
350 &ret();
351 &set_label("sqr_non_sse2",16);
352 }
353
354 # function_begin prologue
355 &push("ebp");
356 &push("ebx");
357 &push("esi");
358 &push("edi");
359
360 &comment("");
361 $r="esi";
362 $a="edi";
363 $num="ebx";
364
365 &mov($r,&wparam(0)); #
366 &mov($a,&wparam(1)); #
367 &mov($num,&wparam(2)); #
368
369 &and($num,0xfffffff8); # num / 8
370 &jz(&label("sw_finish"));
371
372 &set_label("sw_loop",0);
373 for ($i=0; $i<32; $i+=4)
374 {
375 &comment("Round $i");
376 &mov("eax",&DWP($i,$a,"",0)); # *a
377 # XXX
378 &mul("eax"); # *a * *a
379 &mov(&DWP($i*2,$r,"",0),"eax"); #
380 &mov(&DWP($i*2+4,$r,"",0),"edx");#
381 }
382
383 &comment("");
384 &add($a,32);
385 &add($r,64);
386 &sub($num,8);
387 &jnz(&label("sw_loop"));
388
389 &set_label("sw_finish",0);
390 &mov($num,&wparam(2)); # get num
391 &and($num,7);
392 &jz(&label("sw_end"));
393
394 for ($i=0; $i<7; $i++)
395 {
396 &comment("Tail Round $i");
397 &mov("eax",&DWP($i*4,$a,"",0)); # *a
398 # XXX
399 &mul("eax"); # *a * *a
400 &mov(&DWP($i*8,$r,"",0),"eax"); #
401 &dec($num) if ($i != 7-1);
402 &mov(&DWP($i*8+4,$r,"",0),"edx");
403 &jz(&label("sw_end")) if ($i != 7-1);
404 }
405 &set_label("sw_end",0);
406
407 &function_end($name);
408 }
409
410 sub bn_div_words
411 {
412 local($name)=@_;
413
414 &function_begin_B($name,"");
415 &mov("edx",&wparam(0)); #
416 &mov("eax",&wparam(1)); #
417 &mov("ecx",&wparam(2)); #
418 &div("ecx");
419 &ret();
420 &function_end_B($name);
421 }
422
423 sub bn_add_words
424 {
425 local($name)=@_;
426
427 &function_begin($name,"");
428
429 &comment("");
430 $a="esi";
431 $b="edi";
432 $c="eax";
433 $r="ebx";
434 $tmp1="ecx";
435 $tmp2="edx";
436 $num="ebp";
437
438 &mov($r,&wparam(0)); # get r
439 &mov($a,&wparam(1)); # get a
440 &mov($b,&wparam(2)); # get b
441 &mov($num,&wparam(3)); # get num
442 &xor($c,$c); # clear carry
443 &and($num,0xfffffff8); # num / 8
444
445 &jz(&label("aw_finish"));
446
447 &set_label("aw_loop",0);
448 for ($i=0; $i<8; $i++)
449 {
450 &comment("Round $i");
451
452 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
453 &mov($tmp2,&DWP($i*4,$b,"",0)); # *b
454 &add($tmp1,$c);
455 &mov($c,0);
456 &adc($c,$c);
457 &add($tmp1,$tmp2);
458 &adc($c,0);
459 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
460 }
461
462 &comment("");
463 &add($a,32);
464 &add($b,32);
465 &add($r,32);
466 &sub($num,8);
467 &jnz(&label("aw_loop"));
468
469 &set_label("aw_finish",0);
470 &mov($num,&wparam(3)); # get num
471 &and($num,7);
472 &jz(&label("aw_end"));
473
474 for ($i=0; $i<7; $i++)
475 {
476 &comment("Tail Round $i");
477 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
478 &mov($tmp2,&DWP($i*4,$b,"",0));# *b
479 &add($tmp1,$c);
480 &mov($c,0);
481 &adc($c,$c);
482 &add($tmp1,$tmp2);
483 &adc($c,0);
484 &dec($num) if ($i != 6);
485 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
486 &jz(&label("aw_end")) if ($i != 6);
487 }
488 &set_label("aw_end",0);
489
490 # &mov("eax",$c); # $c is "eax"
491
492 &function_end($name);
493 }
494
495 sub bn_sub_words
496 {
497 local($name)=@_;
498
499 &function_begin($name,"");
500
501 &comment("");
502 $a="esi";
503 $b="edi";
504 $c="eax";
505 $r="ebx";
506 $tmp1="ecx";
507 $tmp2="edx";
508 $num="ebp";
509
510 &mov($r,&wparam(0)); # get r
511 &mov($a,&wparam(1)); # get a
512 &mov($b,&wparam(2)); # get b
513 &mov($num,&wparam(3)); # get num
514 &xor($c,$c); # clear carry
515 &and($num,0xfffffff8); # num / 8
516
517 &jz(&label("aw_finish"));
518
519 &set_label("aw_loop",0);
520 for ($i=0; $i<8; $i++)
521 {
522 &comment("Round $i");
523
524 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
525 &mov($tmp2,&DWP($i*4,$b,"",0)); # *b
526 &sub($tmp1,$c);
527 &mov($c,0);
528 &adc($c,$c);
529 &sub($tmp1,$tmp2);
530 &adc($c,0);
531 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
532 }
533
534 &comment("");
535 &add($a,32);
536 &add($b,32);
537 &add($r,32);
538 &sub($num,8);
539 &jnz(&label("aw_loop"));
540
541 &set_label("aw_finish",0);
542 &mov($num,&wparam(3)); # get num
543 &and($num,7);
544 &jz(&label("aw_end"));
545
546 for ($i=0; $i<7; $i++)
547 {
548 &comment("Tail Round $i");
549 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
550 &mov($tmp2,&DWP($i*4,$b,"",0));# *b
551 &sub($tmp1,$c);
552 &mov($c,0);
553 &adc($c,$c);
554 &sub($tmp1,$tmp2);
555 &adc($c,0);
556 &dec($num) if ($i != 6);
557 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
558 &jz(&label("aw_end")) if ($i != 6);
559 }
560 &set_label("aw_end",0);
561
562 # &mov("eax",$c); # $c is "eax"
563
564 &function_end($name);
565 }
566
567 sub bn_sub_part_words
568 {
569 local($name)=@_;
570
571 &function_begin($name,"");
572
573 &comment("");
574 $a="esi";
575 $b="edi";
576 $c="eax";
577 $r="ebx";
578 $tmp1="ecx";
579 $tmp2="edx";
580 $num="ebp";
581
582 &mov($r,&wparam(0)); # get r
583 &mov($a,&wparam(1)); # get a
584 &mov($b,&wparam(2)); # get b
585 &mov($num,&wparam(3)); # get num
586 &xor($c,$c); # clear carry
587 &and($num,0xfffffff8); # num / 8
588
589 &jz(&label("aw_finish"));
590
591 &set_label("aw_loop",0);
592 for ($i=0; $i<8; $i++)
593 {
594 &comment("Round $i");
595
596 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
597 &mov($tmp2,&DWP($i*4,$b,"",0)); # *b
598 &sub($tmp1,$c);
599 &mov($c,0);
600 &adc($c,$c);
601 &sub($tmp1,$tmp2);
602 &adc($c,0);
603 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
604 }
605
606 &comment("");
607 &add($a,32);
608 &add($b,32);
609 &add($r,32);
610 &sub($num,8);
611 &jnz(&label("aw_loop"));
612
613 &set_label("aw_finish",0);
614 &mov($num,&wparam(3)); # get num
615 &and($num,7);
616 &jz(&label("aw_end"));
617
618 for ($i=0; $i<7; $i++)
619 {
620 &comment("Tail Round $i");
621 &mov($tmp1,&DWP(0,$a,"",0)); # *a
622 &mov($tmp2,&DWP(0,$b,"",0));# *b
623 &sub($tmp1,$c);
624 &mov($c,0);
625 &adc($c,$c);
626 &sub($tmp1,$tmp2);
627 &adc($c,0);
628 &mov(&DWP(0,$r,"",0),$tmp1); # *r
629 &add($a, 4);
630 &add($b, 4);
631 &add($r, 4);
632 &dec($num) if ($i != 6);
633 &jz(&label("aw_end")) if ($i != 6);
634 }
635 &set_label("aw_end",0);
636
637 &cmp(&wparam(4),0);
638 &je(&label("pw_end"));
639
640 &mov($num,&wparam(4)); # get dl
641 &cmp($num,0);
642 &je(&label("pw_end"));
643 &jge(&label("pw_pos"));
644
645 &comment("pw_neg");
646 &mov($tmp2,0);
647 &sub($tmp2,$num);
648 &mov($num,$tmp2);
649 &and($num,0xfffffff8); # num / 8
650 &jz(&label("pw_neg_finish"));
651
652 &set_label("pw_neg_loop",0);
653 for ($i=0; $i<8; $i++)
654 {
655 &comment("dl<0 Round $i");
656
657 &mov($tmp1,0);
658 &mov($tmp2,&DWP($i*4,$b,"",0)); # *b
659 &sub($tmp1,$c);
660 &mov($c,0);
661 &adc($c,$c);
662 &sub($tmp1,$tmp2);
663 &adc($c,0);
664 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
665 }
666
667 &comment("");
668 &add($b,32);
669 &add($r,32);
670 &sub($num,8);
671 &jnz(&label("pw_neg_loop"));
672
673 &set_label("pw_neg_finish",0);
674 &mov($tmp2,&wparam(4)); # get dl
675 &mov($num,0);
676 &sub($num,$tmp2);
677 &and($num,7);
678 &jz(&label("pw_end"));
679
680 for ($i=0; $i<7; $i++)
681 {
682 &comment("dl<0 Tail Round $i");
683 &mov($tmp1,0);
684 &mov($tmp2,&DWP($i*4,$b,"",0));# *b
685 &sub($tmp1,$c);
686 &mov($c,0);
687 &adc($c,$c);
688 &sub($tmp1,$tmp2);
689 &adc($c,0);
690 &dec($num) if ($i != 6);
691 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
692 &jz(&label("pw_end")) if ($i != 6);
693 }
694
695 &jmp(&label("pw_end"));
696
697 &set_label("pw_pos",0);
698
699 &and($num,0xfffffff8); # num / 8
700 &jz(&label("pw_pos_finish"));
701
702 &set_label("pw_pos_loop",0);
703
704 for ($i=0; $i<8; $i++)
705 {
706 &comment("dl>0 Round $i");
707
708 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
709 &sub($tmp1,$c);
710 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
711 &jnc(&label("pw_nc".$i));
712 }
713
714 &comment("");
715 &add($a,32);
716 &add($r,32);
717 &sub($num,8);
718 &jnz(&label("pw_pos_loop"));
719
720 &set_label("pw_pos_finish",0);
721 &mov($num,&wparam(4)); # get dl
722 &and($num,7);
723 &jz(&label("pw_end"));
724
725 for ($i=0; $i<7; $i++)
726 {
727 &comment("dl>0 Tail Round $i");
728 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
729 &sub($tmp1,$c);
730 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
731 &jnc(&label("pw_tail_nc".$i));
732 &dec($num) if ($i != 6);
733 &jz(&label("pw_end")) if ($i != 6);
734 }
735 &mov($c,1);
736 &jmp(&label("pw_end"));
737
738 &set_label("pw_nc_loop",0);
739 for ($i=0; $i<8; $i++)
740 {
741 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
742 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
743 &set_label("pw_nc".$i,0);
744 }
745
746 &comment("");
747 &add($a,32);
748 &add($r,32);
749 &sub($num,8);
750 &jnz(&label("pw_nc_loop"));
751
752 &mov($num,&wparam(4)); # get dl
753 &and($num,7);
754 &jz(&label("pw_nc_end"));
755
756 for ($i=0; $i<7; $i++)
757 {
758 &mov($tmp1,&DWP($i*4,$a,"",0)); # *a
759 &mov(&DWP($i*4,$r,"",0),$tmp1); # *r
760 &set_label("pw_tail_nc".$i,0);
761 &dec($num) if ($i != 6);
762 &jz(&label("pw_nc_end")) if ($i != 6);
763 }
764
765 &set_label("pw_nc_end",0);
766 &mov($c,0);
767
768 &set_label("pw_end",0);
769
770 # &mov("eax",$c); # $c is "eax"
771
772 &function_end($name);
773 }