/
x86p_32.asm
1043 lines (770 loc) · 15.5 KB
/
x86p_32.asm
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
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
;
; x86 format converters for HERMES
; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at)
; This source code is licensed under the GNU LGPL
;
; Please refer to the file COPYING.LIB contained in the distribution for
; licensing conditions
;
; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission
;
BITS 32
GLOBAL _ConvertX86p32_32BGR888
GLOBAL _ConvertX86p32_32RGBA888
GLOBAL _ConvertX86p32_32BGRA888
GLOBAL _ConvertX86p32_24RGB888
GLOBAL _ConvertX86p32_24BGR888
GLOBAL _ConvertX86p32_16RGB565
GLOBAL _ConvertX86p32_16BGR565
GLOBAL _ConvertX86p32_16RGB555
GLOBAL _ConvertX86p32_16BGR555
GLOBAL _ConvertX86p32_8RGB332
EXTERN _x86return
SECTION .text
;; _Convert_*
;; Paramters:
;; ESI = source
;; EDI = dest
;; ECX = amount (NOT 0!!! (the _ConvertX86 routine checks for that though))
;; Destroys:
;; EAX, EBX, EDX
_ConvertX86p32_32BGR888:
; check short
cmp ecx,BYTE 32
ja .L3
.L1 ; short loop
mov edx,[esi]
bswap edx
ror edx,8
mov [edi],edx
add esi,BYTE 4
add edi,BYTE 4
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; save ebp
push ebp
; unroll four times
mov ebp,ecx
shr ebp,2
; save count
push ecx
.L4 mov eax,[esi]
mov ebx,[esi+4]
bswap eax
bswap ebx
ror eax,8
mov ecx,[esi+8]
ror ebx,8
mov edx,[esi+12]
bswap ecx
bswap edx
ror ecx,8
mov [edi+0],eax
ror edx,8
mov [edi+4],ebx
mov [edi+8],ecx
mov [edi+12],edx
add esi,BYTE 16
add edi,BYTE 16
dec ebp
jnz .L4
; check tail
pop ecx
and ecx,BYTE 11b
jz .L6
.L5 ; tail loop
mov edx,[esi]
bswap edx
ror edx,8
mov [edi],edx
add esi,BYTE 4
add edi,BYTE 4
dec ecx
jnz .L5
.L6 pop ebp
jmp _x86return
_ConvertX86p32_32RGBA888:
; check short
cmp ecx,BYTE 32
ja .L3
.L1 ; short loop
mov edx,[esi]
rol edx,8
mov [edi],edx
add esi,BYTE 4
add edi,BYTE 4
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; save ebp
push ebp
; unroll four times
mov ebp,ecx
shr ebp,2
; save count
push ecx
.L4 mov eax,[esi]
mov ebx,[esi+4]
rol eax,8
mov ecx,[esi+8]
rol ebx,8
mov edx,[esi+12]
rol ecx,8
mov [edi+0],eax
rol edx,8
mov [edi+4],ebx
mov [edi+8],ecx
mov [edi+12],edx
add esi,BYTE 16
add edi,BYTE 16
dec ebp
jnz .L4
; check tail
pop ecx
and ecx,BYTE 11b
jz .L6
.L5 ; tail loop
mov edx,[esi]
rol edx,8
mov [edi],edx
add esi,BYTE 4
add edi,BYTE 4
dec ecx
jnz .L5
.L6 pop ebp
jmp _x86return
_ConvertX86p32_32BGRA888:
; check short
cmp ecx,BYTE 32
ja .L3
.L1 ; short loop
mov edx,[esi]
bswap edx
mov [edi],edx
add esi,BYTE 4
add edi,BYTE 4
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; save ebp
push ebp
; unroll four times
mov ebp,ecx
shr ebp,2
; save count
push ecx
.L4 mov eax,[esi]
mov ebx,[esi+4]
mov ecx,[esi+8]
mov edx,[esi+12]
bswap eax
bswap ebx
bswap ecx
bswap edx
mov [edi+0],eax
mov [edi+4],ebx
mov [edi+8],ecx
mov [edi+12],edx
add esi,BYTE 16
add edi,BYTE 16
dec ebp
jnz .L4
; check tail
pop ecx
and ecx,BYTE 11b
jz .L6
.L5 ; tail loop
mov edx,[esi]
bswap edx
mov [edi],edx
add esi,BYTE 4
add edi,BYTE 4
dec ecx
jnz .L5
.L6 pop ebp
jmp _x86return
;; 32 bit RGB 888 to 24 BIT RGB 888
_ConvertX86p32_24RGB888:
; check short
cmp ecx,BYTE 32
ja .L3
.L1 ; short loop
mov al,[esi]
mov bl,[esi+1]
mov dl,[esi+2]
mov [edi],al
mov [edi+1],bl
mov [edi+2],dl
add esi,BYTE 4
add edi,BYTE 3
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; head
mov edx,edi
and edx,BYTE 11b
jz .L4
mov al,[esi]
mov bl,[esi+1]
mov dl,[esi+2]
mov [edi],al
mov [edi+1],bl
mov [edi+2],dl
add esi,BYTE 4
add edi,BYTE 3
dec ecx
jmp SHORT .L3
.L4 ; unroll 4 times
push ebp
mov ebp,ecx
shr ebp,2
; save count
push ecx
.L5 mov eax,[esi] ; first dword eax = [A][R][G][B]
mov ebx,[esi+4] ; second dword ebx = [a][r][g][b]
shl eax,8 ; eax = [R][G][B][.]
mov ecx,[esi+12] ; third dword ecx = [a][r][g][b]
shl ebx,8 ; ebx = [r][g][b][.]
mov al,[esi+4] ; eax = [R][G][B][b]
ror eax,8 ; eax = [b][R][G][B] (done)
mov bh,[esi+8+1] ; ebx = [r][g][G][.]
mov [edi],eax
add edi,BYTE 3*4
shl ecx,8 ; ecx = [r][g][b][.]
mov bl,[esi+8+0] ; ebx = [r][g][G][B]
rol ebx,16 ; ebx = [G][B][r][g] (done)
mov cl,[esi+8+2] ; ecx = [r][g][b][R] (done)
mov [edi+4-3*4],ebx
add esi,BYTE 4*4
mov [edi+8-3*4],ecx
dec ebp
jnz .L5
; check tail
pop ecx
and ecx,BYTE 11b
jz .L7
.L6 ; tail loop
mov al,[esi]
mov bl,[esi+1]
mov dl,[esi+2]
mov [edi],al
mov [edi+1],bl
mov [edi+2],dl
add esi,BYTE 4
add edi,BYTE 3
dec ecx
jnz .L6
.L7 pop ebp
jmp _x86return
;; 32 bit RGB 888 to 24 bit BGR 888
_ConvertX86p32_24BGR888:
; check short
cmp ecx,BYTE 32
ja .L3
.L1 ; short loop
mov dl,[esi]
mov bl,[esi+1]
mov al,[esi+2]
mov [edi],al
mov [edi+1],bl
mov [edi+2],dl
add esi,BYTE 4
add edi,BYTE 3
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; head
mov edx,edi
and edx,BYTE 11b
jz .L4
mov dl,[esi]
mov bl,[esi+1]
mov al,[esi+2]
mov [edi],al
mov [edi+1],bl
mov [edi+2],dl
add esi,BYTE 4
add edi,BYTE 3
dec ecx
jmp SHORT .L3
.L4 ; unroll 4 times
push ebp
mov ebp,ecx
shr ebp,2
; save count
push ecx
.L5
mov eax,[esi] ; first dword eax = [A][R][G][B]
mov ebx,[esi+4] ; second dword ebx = [a][r][g][b]
bswap eax ; eax = [B][G][R][A]
bswap ebx ; ebx = [b][g][r][a]
mov al,[esi+4+2] ; eax = [B][G][R][r]
mov bh,[esi+4+4+1] ; ebx = [b][g][G][a]
ror eax,8 ; eax = [r][B][G][R] (done)
mov bl,[esi+4+4+2] ; ebx = [b][g][G][R]
ror ebx,16 ; ebx = [G][R][b][g] (done)
mov [edi],eax
mov [edi+4],ebx
mov ecx,[esi+12] ; third dword ecx = [a][r][g][b]
bswap ecx ; ecx = [b][g][r][a]
mov cl,[esi+8] ; ecx = [b][g][r][B] (done)
add esi,BYTE 4*4
mov [edi+8],ecx
add edi,BYTE 3*4
dec ebp
jnz .L5
; check tail
pop ecx
and ecx,BYTE 11b
jz .L7
.L6 ; tail loop
mov dl,[esi]
mov bl,[esi+1]
mov al,[esi+2]
mov [edi],al
mov [edi+1],bl
mov [edi+2],dl
add esi,BYTE 4
add edi,BYTE 3
dec ecx
jnz .L6
.L7
pop ebp
jmp _x86return
;; 32 bit RGB 888 to 16 BIT RGB 565
_ConvertX86p32_16RGB565:
; check short
cmp ecx,BYTE 16
ja .L3
.L1 ; short loop
mov bl,[esi+0] ; blue
mov al,[esi+1] ; green
mov ah,[esi+2] ; red
shr ah,3
and al,11111100b
shl eax,3
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
jnz .L1
.L2: ; End of short loop
jmp _x86return
.L3 ; head
mov ebx,edi
and ebx,BYTE 11b
jz .L4
mov bl,[esi+0] ; blue
mov al,[esi+1] ; green
mov ah,[esi+2] ; red
shr ah,3
and al,11111100b
shl eax,3
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
.L4:
; save count
push ecx
; unroll twice
shr ecx,1
; point arrays to end
lea esi,[esi+ecx*8]
lea edi,[edi+ecx*4]
; negative counter
neg ecx
jmp SHORT .L6
.L5:
mov [edi+ecx*4-4],eax
.L6:
mov eax,[esi+ecx*8]
shr ah,2
mov ebx,[esi+ecx*8+4]
shr eax,3
mov edx,[esi+ecx*8+4]
shr bh,2
mov dl,[esi+ecx*8+2]
shl ebx,13
and eax,000007FFh
shl edx,8
and ebx,07FF0000h
and edx,0F800F800h
add eax,ebx
add eax,edx
inc ecx
jnz .L5
mov [edi+ecx*4-4],eax
; tail
pop ecx
test cl,1
jz .L7
mov bl,[esi+0] ; blue
mov al,[esi+1] ; green
mov ah,[esi+2] ; red
shr ah,3
and al,11111100b
shl eax,3
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
.L7:
jmp _x86return
;; 32 bit RGB 888 to 16 BIT BGR 565
_ConvertX86p32_16BGR565:
; check short
cmp ecx,BYTE 16
ja .L3
.L1 ; short loop
mov ah,[esi+0] ; blue
mov al,[esi+1] ; green
mov bl,[esi+2] ; red
shr ah,3
and al,11111100b
shl eax,3
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; head
mov ebx,edi
and ebx,BYTE 11b
jz .L4
mov ah,[esi+0] ; blue
mov al,[esi+1] ; green
mov bl,[esi+2] ; red
shr ah,3
and al,11111100b
shl eax,3
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
.L4 ; save count
push ecx
; unroll twice
shr ecx,1
; point arrays to end
lea esi,[esi+ecx*8]
lea edi,[edi+ecx*4]
; negative count
neg ecx
jmp SHORT .L6
.L5
mov [edi+ecx*4-4],eax
.L6
mov edx,[esi+ecx*8+4]
mov bh,[esi+ecx*8+4]
mov ah,[esi+ecx*8]
shr bh,3
mov al,[esi+ecx*8+1]
shr ah,3
mov bl,[esi+ecx*8+5]
shl eax,3
mov dl,[esi+ecx*8+2]
shl ebx,19
and eax,0000FFE0h
shr edx,3
and ebx,0FFE00000h
and edx,001F001Fh
add eax,ebx
add eax,edx
inc ecx
jnz .L5
mov [edi+ecx*4-4],eax
; tail
pop ecx
and ecx,BYTE 1
jz .L7
mov ah,[esi+0] ; blue
mov al,[esi+1] ; green
mov bl,[esi+2] ; red
shr ah,3
and al,11111100b
shl eax,3
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
.L7
jmp _x86return
;; 32 BIT RGB TO 16 BIT RGB 555
_ConvertX86p32_16RGB555:
; check short
cmp ecx,BYTE 16
ja .L3
.L1 ; short loop
mov bl,[esi+0] ; blue
mov al,[esi+1] ; green
mov ah,[esi+2] ; red
shr ah,3
and al,11111000b
shl eax,2
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; head
mov ebx,edi
and ebx,BYTE 11b
jz .L4
mov bl,[esi+0] ; blue
mov al,[esi+1] ; green
mov ah,[esi+2] ; red
shr ah,3
and al,11111000b
shl eax,2
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
.L4 ; save count
push ecx
; unroll twice
shr ecx,1
; point arrays to end
lea esi,[esi+ecx*8]
lea edi,[edi+ecx*4]
; negative counter
neg ecx
jmp SHORT .L6
.L5
mov [edi+ecx*4-4],eax
.L6
mov eax,[esi+ecx*8]
shr ah,3
mov ebx,[esi+ecx*8+4]
shr eax,3
mov edx,[esi+ecx*8+4]
shr bh,3
mov dl,[esi+ecx*8+2]
shl ebx,13
and eax,000007FFh
shl edx,7
and ebx,07FF0000h
and edx,07C007C00h
add eax,ebx
add eax,edx
inc ecx
jnz .L5
mov [edi+ecx*4-4],eax
; tail
pop ecx
and ecx,BYTE 1
jz .L7
mov bl,[esi+0] ; blue
mov al,[esi+1] ; green
mov ah,[esi+2] ; red
shr ah,3
and al,11111000b
shl eax,2
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
.L7
jmp _x86return
;; 32 BIT RGB TO 16 BIT BGR 555
_ConvertX86p32_16BGR555:
; check short
cmp ecx,BYTE 16
ja .L3
.L1 ; short loop
mov ah,[esi+0] ; blue
mov al,[esi+1] ; green
mov bl,[esi+2] ; red
shr ah,3
and al,11111000b
shl eax,2
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
jnz .L1
.L2
jmp _x86return
.L3 ; head
mov ebx,edi
and ebx,BYTE 11b
jz .L4
mov ah,[esi+0] ; blue
mov al,[esi+1] ; green
mov bl,[esi+2] ; red
shr ah,3
and al,11111000b
shl eax,2
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
dec ecx
.L4 ; save count
push ecx
; unroll twice
shr ecx,1
; point arrays to end
lea esi,[esi+ecx*8]
lea edi,[edi+ecx*4]
; negative counter
neg ecx
jmp SHORT .L6
.L5
mov [edi+ecx*4-4],eax
.L6
mov edx,[esi+ecx*8+4]
mov bh,[esi+ecx*8+4]
mov ah,[esi+ecx*8]
shr bh,3
mov al,[esi+ecx*8+1]
shr ah,3
mov bl,[esi+ecx*8+5]
shl eax,2
mov dl,[esi+ecx*8+2]
shl ebx,18
and eax,00007FE0h
shr edx,3
and ebx,07FE00000h
and edx,001F001Fh
add eax,ebx
add eax,edx
inc ecx
jnz .L5
mov [edi+ecx*4-4],eax
; tail
pop ecx
and ecx,BYTE 1
jz .L7
mov ah,[esi+0] ; blue
mov al,[esi+1] ; green
mov bl,[esi+2] ; red
shr ah,3
and al,11111000b
shl eax,2
shr bl,3
add al,bl
mov [edi+0],al
mov [edi+1],ah
add esi,BYTE 4
add edi,BYTE 2
.L7
jmp _x86return
;; FROM 32 BIT RGB to 8 BIT RGB (rrrgggbbb)
;; This routine writes FOUR pixels at once (dword) and then, if they exist
;; the trailing three pixels
_ConvertX86p32_8RGB332:
.L_ALIGNED
push ecx
shr ecx,2 ; We will draw 4 pixels at once
jnz .L1
jmp .L2 ; short jump out of range :(
.L1:
mov eax,[esi] ; first pair of pixels
mov edx,[esi+4]
shr dl,6
mov ebx,eax
shr al,6
and ah,0e0h
shr ebx,16
and dh,0e0h
shr ah,3
and bl,0e0h
shr dh,3
or al,bl
mov ebx,edx
or al,ah
shr ebx,16
or dl,dh
and bl,0e0h
or dl,bl
mov ah,dl
mov ebx,[esi+8] ; second pair of pixels
mov edx,ebx
and bh,0e0h
shr bl,6
and edx,0e00000h
shr edx,16
shr bh,3
ror eax,16
or bl,dl
mov edx,[esi+12]
or bl,bh
mov al,bl
mov ebx,edx
and dh,0e0h
shr dl,6
and ebx,0e00000h
shr dh,3
mov ah,dl
shr ebx,16
or ah,dh
or ah,bl