WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/SDL-1.2.2_newlib/src/hermes/x86p_32.asm

Rev	Author	Line No.	Line
8210	maxcodehac	1	;
		2	; x86 format converters for HERMES
		3	; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at)
		4	; This source code is licensed under the GNU LGPL
		5	;
		6	; Please refer to the file COPYING.LIB contained in the distribution for
		7	; licensing conditions
		8	;
		9	; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission
		10	;
		11
		12	BITS 32
		13
9172	turbocat	14	%include "common.inc"
8210	maxcodehac	15
9172	turbocat	16	SDL_FUNC _ConvertX86p32_32BGR888
		17	SDL_FUNC _ConvertX86p32_32RGBA888
		18	SDL_FUNC _ConvertX86p32_32BGRA888
		19	SDL_FUNC _ConvertX86p32_24RGB888
		20	SDL_FUNC _ConvertX86p32_24BGR888
		21	SDL_FUNC _ConvertX86p32_16RGB565
		22	SDL_FUNC _ConvertX86p32_16BGR565
		23	SDL_FUNC _ConvertX86p32_16RGB555
		24	SDL_FUNC _ConvertX86p32_16BGR555
		25	SDL_FUNC _ConvertX86p32_8RGB332
		26
8210	maxcodehac	27	SECTION .text
		28
		29	;; _Convert_*
		30	;; Paramters:
		31	;; ESI = source
		32	;; EDI = dest
		33	;; ECX = amount (NOT 0!!! (the _ConvertX86 routine checks for that though))
		34	;; Destroys:
		35	;; EAX, EBX, EDX
		36
		37
		38	_ConvertX86p32_32BGR888:
		39
		40	; check short
		41	cmp ecx,BYTE 32
		42	ja .L3
		43
9172	turbocat	44	.L1: ; short loop
8210	maxcodehac	45	mov edx,[esi]
		46	bswap edx
		47	ror edx,8
		48	mov [edi],edx
		49	add esi,BYTE 4
		50	add edi,BYTE 4
		51	dec ecx
		52	jnz .L1
9172	turbocat	53	.L2:
		54	retn
8210	maxcodehac	55
9172	turbocat	56	.L3: ; save ebp
8210	maxcodehac	57	push ebp
		58
		59	; unroll four times
		60	mov ebp,ecx
		61	shr ebp,2
		62
		63	; save count
		64	push ecx
		65
9172	turbocat	66	.L4: mov eax,[esi]
8210	maxcodehac	67	mov ebx,[esi+4]
		68
		69	bswap eax
		70
		71	bswap ebx
		72
		73	ror eax,8
		74	mov ecx,[esi+8]
		75
		76	ror ebx,8
		77	mov edx,[esi+12]
		78
		79	bswap ecx
		80
		81	bswap edx
		82
		83	ror ecx,8
		84	mov [edi+0],eax
		85
		86	ror edx,8
		87	mov [edi+4],ebx
		88
		89	mov [edi+8],ecx
		90	mov [edi+12],edx
		91
		92	add esi,BYTE 16
		93	add edi,BYTE 16
		94
		95	dec ebp
		96	jnz .L4
		97
		98	; check tail
		99	pop ecx
		100	and ecx,BYTE 11b
		101	jz .L6
		102
9172	turbocat	103	.L5: ; tail loop
8210	maxcodehac	104	mov edx,[esi]
		105	bswap edx
		106	ror edx,8
		107	mov [edi],edx
		108	add esi,BYTE 4
		109	add edi,BYTE 4
		110	dec ecx
		111	jnz .L5
		112
9172	turbocat	113	.L6: pop ebp
		114	retn
8210	maxcodehac	115
		116
		117
		118
		119	_ConvertX86p32_32RGBA888:
		120
		121	; check short
		122	cmp ecx,BYTE 32
		123	ja .L3
		124
9172	turbocat	125	.L1: ; short loop
8210	maxcodehac	126	mov edx,[esi]
		127	rol edx,8
		128	mov [edi],edx
		129	add esi,BYTE 4
		130	add edi,BYTE 4
		131	dec ecx
		132	jnz .L1
9172	turbocat	133	.L2:
		134	retn
8210	maxcodehac	135
9172	turbocat	136	.L3: ; save ebp
8210	maxcodehac	137	push ebp
		138
		139	; unroll four times
		140	mov ebp,ecx
		141	shr ebp,2
		142
		143	; save count
		144	push ecx
		145
9172	turbocat	146	.L4: mov eax,[esi]
8210	maxcodehac	147	mov ebx,[esi+4]
		148
		149	rol eax,8
		150	mov ecx,[esi+8]
		151
		152	rol ebx,8
		153	mov edx,[esi+12]
		154
		155	rol ecx,8
		156	mov [edi+0],eax
		157
		158	rol edx,8
		159	mov [edi+4],ebx
		160
		161	mov [edi+8],ecx
		162	mov [edi+12],edx
		163
		164	add esi,BYTE 16
		165	add edi,BYTE 16
		166
		167	dec ebp
		168	jnz .L4
		169
		170	; check tail
		171	pop ecx
		172	and ecx,BYTE 11b
		173	jz .L6
		174
9172	turbocat	175	.L5: ; tail loop
8210	maxcodehac	176	mov edx,[esi]
		177	rol edx,8
		178	mov [edi],edx
		179	add esi,BYTE 4
		180	add edi,BYTE 4
		181	dec ecx
		182	jnz .L5
		183
9172	turbocat	184	.L6: pop ebp
		185	retn
8210	maxcodehac	186
		187
		188
		189
		190	_ConvertX86p32_32BGRA888:
		191
		192	; check short
		193	cmp ecx,BYTE 32
		194	ja .L3
		195
9172	turbocat	196	.L1: ; short loop
8210	maxcodehac	197	mov edx,[esi]
		198	bswap edx
		199	mov [edi],edx
		200	add esi,BYTE 4
		201	add edi,BYTE 4
		202	dec ecx
		203	jnz .L1
9172	turbocat	204	.L2:
		205	retn
8210	maxcodehac	206
9172	turbocat	207	.L3: ; save ebp
8210	maxcodehac	208	push ebp
		209
		210	; unroll four times
		211	mov ebp,ecx
		212	shr ebp,2
		213
		214	; save count
		215	push ecx
		216
9172	turbocat	217	.L4: mov eax,[esi]
8210	maxcodehac	218	mov ebx,[esi+4]
		219
		220	mov ecx,[esi+8]
		221	mov edx,[esi+12]
		222
		223	bswap eax
		224
		225	bswap ebx
		226
		227	bswap ecx
		228
		229	bswap edx
		230
		231	mov [edi+0],eax
		232	mov [edi+4],ebx
		233
		234	mov [edi+8],ecx
		235	mov [edi+12],edx
		236
		237	add esi,BYTE 16
		238	add edi,BYTE 16
		239
		240	dec ebp
		241	jnz .L4
		242
		243	; check tail
		244	pop ecx
		245	and ecx,BYTE 11b
		246	jz .L6
		247
9172	turbocat	248	.L5: ; tail loop
8210	maxcodehac	249	mov edx,[esi]
		250	bswap edx
		251	mov [edi],edx
		252	add esi,BYTE 4
		253	add edi,BYTE 4
		254	dec ecx
		255	jnz .L5
		256
9172	turbocat	257	.L6: pop ebp
		258	retn
8210	maxcodehac	259
		260
		261
		262
		263	;; 32 bit RGB 888 to 24 BIT RGB 888
		264
		265	_ConvertX86p32_24RGB888:
		266
		267	; check short
		268	cmp ecx,BYTE 32
		269	ja .L3
		270
9172	turbocat	271	.L1: ; short loop
8210	maxcodehac	272	mov al,[esi]
		273	mov bl,[esi+1]
		274	mov dl,[esi+2]
		275	mov [edi],al
		276	mov [edi+1],bl
		277	mov [edi+2],dl
		278	add esi,BYTE 4
		279	add edi,BYTE 3
		280	dec ecx
		281	jnz .L1
9172	turbocat	282	.L2:
		283	retn
8210	maxcodehac	284
9172	turbocat	285	.L3: ; head
8210	maxcodehac	286	mov edx,edi
		287	and edx,BYTE 11b
		288	jz .L4
		289	mov al,[esi]
		290	mov bl,[esi+1]
		291	mov dl,[esi+2]
		292	mov [edi],al
		293	mov [edi+1],bl
		294	mov [edi+2],dl
		295	add esi,BYTE 4
		296	add edi,BYTE 3
		297	dec ecx
		298	jmp SHORT .L3
		299
9172	turbocat	300	.L4: ; unroll 4 times
8210	maxcodehac	301	push ebp
		302	mov ebp,ecx
		303	shr ebp,2
		304
		305	; save count
		306	push ecx
		307
9172	turbocat	308	.L5: mov eax,[esi] ; first dword eax = [A][R][G][B]
8210	maxcodehac	309	mov ebx,[esi+4] ; second dword ebx = [a][r][g][b]
		310
		311	shl eax,8 ; eax = [R][G][B][.]
		312	mov ecx,[esi+12] ; third dword ecx = [a][r][g][b]
		313
		314	shl ebx,8 ; ebx = [r][g][b][.]
		315	mov al,[esi+4] ; eax = [R][G][B][b]
		316
		317	ror eax,8 ; eax = [b][R][G][B] (done)
		318	mov bh,[esi+8+1] ; ebx = [r][g][G][.]
		319
		320	mov [edi],eax
		321	add edi,BYTE 3*4
		322
		323	shl ecx,8 ; ecx = [r][g][b][.]
		324	mov bl,[esi+8+0] ; ebx = [r][g][G][B]
		325
		326	rol ebx,16 ; ebx = [G][B][r][g] (done)
		327	mov cl,[esi+8+2] ; ecx = [r][g][b][R] (done)
		328
		329	mov [edi+4-3*4],ebx
		330	add esi,BYTE 4*4
		331
		332	mov [edi+8-3*4],ecx
		333	dec ebp
		334
		335	jnz .L5
		336
		337	; check tail
		338	pop ecx
		339	and ecx,BYTE 11b
		340	jz .L7
		341
9172	turbocat	342	.L6: ; tail loop
8210	maxcodehac	343	mov al,[esi]
		344	mov bl,[esi+1]
		345	mov dl,[esi+2]
		346	mov [edi],al
		347	mov [edi+1],bl
		348	mov [edi+2],dl
		349	add esi,BYTE 4
		350	add edi,BYTE 3
		351	dec ecx
		352	jnz .L6
		353
9172	turbocat	354	.L7: pop ebp
		355	retn
8210	maxcodehac	356
		357
		358
		359
		360	;; 32 bit RGB 888 to 24 bit BGR 888
		361
		362	_ConvertX86p32_24BGR888:
		363
		364	; check short
		365	cmp ecx,BYTE 32
		366	ja .L3
		367
9172	turbocat	368	.L1: ; short loop
8210	maxcodehac	369	mov dl,[esi]
		370	mov bl,[esi+1]
		371	mov al,[esi+2]
		372	mov [edi],al
		373	mov [edi+1],bl
		374	mov [edi+2],dl
		375	add esi,BYTE 4
		376	add edi,BYTE 3
		377	dec ecx
		378	jnz .L1
9172	turbocat	379	.L2:
		380	retn
8210	maxcodehac	381
9172	turbocat	382	.L3: ; head
8210	maxcodehac	383	mov edx,edi
		384	and edx,BYTE 11b
		385	jz .L4
		386	mov dl,[esi]
		387	mov bl,[esi+1]
		388	mov al,[esi+2]
		389	mov [edi],al
		390	mov [edi+1],bl
		391	mov [edi+2],dl
		392	add esi,BYTE 4
		393	add edi,BYTE 3
		394	dec ecx
		395	jmp SHORT .L3
		396
9172	turbocat	397	.L4: ; unroll 4 times
8210	maxcodehac	398	push ebp
		399	mov ebp,ecx
		400	shr ebp,2
		401
		402	; save count
		403	push ecx
		404
9172	turbocat	405	.L5:
8210	maxcodehac	406	mov eax,[esi] ; first dword eax = [A][R][G][B]
		407	mov ebx,[esi+4] ; second dword ebx = [a][r][g][b]
9172	turbocat	408
8210	maxcodehac	409	bswap eax ; eax = [B][G][R][A]
		410
		411	bswap ebx ; ebx = [b][g][r][a]
		412
		413	mov al,[esi+4+2] ; eax = [B][G][R][r]
		414	mov bh,[esi+4+4+1] ; ebx = [b][g][G][a]
		415
		416	ror eax,8 ; eax = [r][B][G][R] (done)
		417	mov bl,[esi+4+4+2] ; ebx = [b][g][G][R]
		418
		419	ror ebx,16 ; ebx = [G][R][b][g] (done)
		420	mov [edi],eax
		421
		422	mov [edi+4],ebx
		423	mov ecx,[esi+12] ; third dword ecx = [a][r][g][b]
		424
		425	bswap ecx ; ecx = [b][g][r][a]
		426
		427	mov cl,[esi+8] ; ecx = [b][g][r][B] (done)
		428	add esi,BYTE 4*4
		429
		430	mov [edi+8],ecx
		431	add edi,BYTE 3*4
		432
		433	dec ebp
		434	jnz .L5
		435
		436	; check tail
		437	pop ecx
		438	and ecx,BYTE 11b
		439	jz .L7
		440
9172	turbocat	441	.L6: ; tail loop
8210	maxcodehac	442	mov dl,[esi]
		443	mov bl,[esi+1]
		444	mov al,[esi+2]
		445	mov [edi],al
		446	mov [edi+1],bl
		447	mov [edi+2],dl
		448	add esi,BYTE 4
		449	add edi,BYTE 3
		450	dec ecx
		451	jnz .L6
		452
9172	turbocat	453	.L7:
8210	maxcodehac	454	pop ebp
9172	turbocat	455	retn
8210	maxcodehac	456
		457
		458
		459
		460	;; 32 bit RGB 888 to 16 BIT RGB 565
		461
		462	_ConvertX86p32_16RGB565:
		463	; check short
		464	cmp ecx,BYTE 16
		465	ja .L3
		466
9172	turbocat	467	.L1: ; short loop
8210	maxcodehac	468	mov bl,[esi+0] ; blue
		469	mov al,[esi+1] ; green
		470	mov ah,[esi+2] ; red
		471	shr ah,3
		472	and al,11111100b
		473	shl eax,3
		474	shr bl,3
		475	add al,bl
		476	mov [edi+0],al
		477	mov [edi+1],ah
		478	add esi,BYTE 4
		479	add edi,BYTE 2
		480	dec ecx
		481	jnz .L1
		482
		483	.L2: ; End of short loop
9172	turbocat	484	retn
8210	maxcodehac	485
		486
9172	turbocat	487	.L3: ; head
8210	maxcodehac	488	mov ebx,edi
		489	and ebx,BYTE 11b
		490	jz .L4
		491
		492	mov bl,[esi+0] ; blue
		493	mov al,[esi+1] ; green
		494	mov ah,[esi+2] ; red
		495	shr ah,3
		496	and al,11111100b
		497	shl eax,3
		498	shr bl,3
		499	add al,bl
		500	mov [edi+0],al
		501	mov [edi+1],ah
		502	add esi,BYTE 4
		503	add edi,BYTE 2
		504	dec ecx
		505
		506	.L4:
		507	; save count
		508	push ecx
		509
		510	; unroll twice
		511	shr ecx,1
		512
		513	; point arrays to end
		514	lea esi,[esi+ecx*8]
		515	lea edi,[edi+ecx*4]
		516
		517	; negative counter
		518	neg ecx
		519	jmp SHORT .L6
		520
		521	.L5:
		522	mov [edi+ecx*4-4],eax
		523	.L6:
		524	mov eax,[esi+ecx*8]
		525
		526	shr ah,2
		527	mov ebx,[esi+ecx*8+4]
		528
		529	shr eax,3
		530	mov edx,[esi+ecx*8+4]
		531
		532	shr bh,2
		533	mov dl,[esi+ecx*8+2]
		534
		535	shl ebx,13
		536	and eax,000007FFh
		537
		538	shl edx,8
		539	and ebx,07FF0000h
		540
		541	and edx,0F800F800h
		542	add eax,ebx
		543
		544	add eax,edx
		545	inc ecx
		546
		547	jnz .L5
		548
		549	mov [edi+ecx*4-4],eax
		550
		551	; tail
		552	pop ecx
		553	test cl,1
		554	jz .L7
		555
		556	mov bl,[esi+0] ; blue
		557	mov al,[esi+1] ; green
		558	mov ah,[esi+2] ; red
		559	shr ah,3
		560	and al,11111100b
		561	shl eax,3
		562	shr bl,3
		563	add al,bl
		564	mov [edi+0],al
		565	mov [edi+1],ah
		566	add esi,BYTE 4
		567	add edi,BYTE 2
		568
		569	.L7:
9172	turbocat	570	retn
8210	maxcodehac	571
		572
		573
		574
		575	;; 32 bit RGB 888 to 16 BIT BGR 565
		576
		577	_ConvertX86p32_16BGR565:
		578
		579	; check short
		580	cmp ecx,BYTE 16
		581	ja .L3
		582
9172	turbocat	583	.L1: ; short loop
8210	maxcodehac	584	mov ah,[esi+0] ; blue
		585	mov al,[esi+1] ; green
		586	mov bl,[esi+2] ; red
		587	shr ah,3
		588	and al,11111100b
		589	shl eax,3
		590	shr bl,3
		591	add al,bl
		592	mov [edi+0],al
		593	mov [edi+1],ah
		594	add esi,BYTE 4
		595	add edi,BYTE 2
		596	dec ecx
		597	jnz .L1
9172	turbocat	598	.L2:
		599	retn
8210	maxcodehac	600
9172	turbocat	601	.L3: ; head
8210	maxcodehac	602	mov ebx,edi
		603	and ebx,BYTE 11b
		604	jz .L4
		605	mov ah,[esi+0] ; blue
		606	mov al,[esi+1] ; green
		607	mov bl,[esi+2] ; red
		608	shr ah,3
		609	and al,11111100b
		610	shl eax,3
		611	shr bl,3
		612	add al,bl
		613	mov [edi+0],al
		614	mov [edi+1],ah
		615	add esi,BYTE 4
		616	add edi,BYTE 2
		617	dec ecx
		618
9172	turbocat	619	.L4: ; save count
8210	maxcodehac	620	push ecx
		621
		622	; unroll twice
		623	shr ecx,1
		624
		625	; point arrays to end
		626	lea esi,[esi+ecx*8]
		627	lea edi,[edi+ecx*4]
		628
		629	; negative count
		630	neg ecx
		631	jmp SHORT .L6
		632
9172	turbocat	633	.L5:
8210	maxcodehac	634	mov [edi+ecx*4-4],eax
9172	turbocat	635	.L6:
8210	maxcodehac	636	mov edx,[esi+ecx*8+4]
		637
		638	mov bh,[esi+ecx*8+4]
		639	mov ah,[esi+ecx*8]
		640
		641	shr bh,3
		642	mov al,[esi+ecx*8+1]
		643
		644	shr ah,3
		645	mov bl,[esi+ecx*8+5]
		646
		647	shl eax,3
		648	mov dl,[esi+ecx*8+2]
		649
		650	shl ebx,19
		651	and eax,0000FFE0h
		652
		653	shr edx,3
		654	and ebx,0FFE00000h
		655
		656	and edx,001F001Fh
		657	add eax,ebx
		658
		659	add eax,edx
		660	inc ecx
		661
		662	jnz .L5
		663
		664	mov [edi+ecx*4-4],eax
		665
		666	; tail
		667	pop ecx
		668	and ecx,BYTE 1
		669	jz .L7
		670	mov ah,[esi+0] ; blue
		671	mov al,[esi+1] ; green
		672	mov bl,[esi+2] ; red
		673	shr ah,3
		674	and al,11111100b
		675	shl eax,3
		676	shr bl,3
		677	add al,bl
		678	mov [edi+0],al
		679	mov [edi+1],ah
		680	add esi,BYTE 4
		681	add edi,BYTE 2
		682
9172	turbocat	683	.L7:
		684	retn
8210	maxcodehac	685
		686
		687
		688
		689	;; 32 BIT RGB TO 16 BIT RGB 555
		690
		691	_ConvertX86p32_16RGB555:
		692
		693	; check short
		694	cmp ecx,BYTE 16
		695	ja .L3
		696
9172	turbocat	697	.L1: ; short loop
8210	maxcodehac	698	mov bl,[esi+0] ; blue
		699	mov al,[esi+1] ; green
		700	mov ah,[esi+2] ; red
		701	shr ah,3
		702	and al,11111000b
		703	shl eax,2
		704	shr bl,3
		705	add al,bl
		706	mov [edi+0],al
		707	mov [edi+1],ah
		708	add esi,BYTE 4
		709	add edi,BYTE 2
		710	dec ecx
		711	jnz .L1
9172	turbocat	712	.L2:
		713	retn
8210	maxcodehac	714
9172	turbocat	715	.L3: ; head
8210	maxcodehac	716	mov ebx,edi
		717	and ebx,BYTE 11b
		718	jz .L4
		719	mov bl,[esi+0] ; blue
		720	mov al,[esi+1] ; green
		721	mov ah,[esi+2] ; red
		722	shr ah,3
		723	and al,11111000b
		724	shl eax,2
		725	shr bl,3
		726	add al,bl
		727	mov [edi+0],al
		728	mov [edi+1],ah
		729	add esi,BYTE 4
		730	add edi,BYTE 2
		731	dec ecx
		732
9172	turbocat	733	.L4: ; save count
8210	maxcodehac	734	push ecx
		735
		736	; unroll twice
		737	shr ecx,1
		738
		739	; point arrays to end
		740	lea esi,[esi+ecx*8]
		741	lea edi,[edi+ecx*4]
		742
		743	; negative counter
		744	neg ecx
		745	jmp SHORT .L6
		746
9172	turbocat	747	.L5:
8210	maxcodehac	748	mov [edi+ecx*4-4],eax
9172	turbocat	749	.L6:
8210	maxcodehac	750	mov eax,[esi+ecx*8]
		751
		752	shr ah,3
		753	mov ebx,[esi+ecx*8+4]
		754
		755	shr eax,3
		756	mov edx,[esi+ecx*8+4]
		757
		758	shr bh,3
		759	mov dl,[esi+ecx*8+2]
		760
		761	shl ebx,13
		762	and eax,000007FFh
		763
		764	shl edx,7
		765	and ebx,07FF0000h
		766
		767	and edx,07C007C00h
		768	add eax,ebx
		769
		770	add eax,edx
		771	inc ecx
		772
		773	jnz .L5
		774
		775	mov [edi+ecx*4-4],eax
		776
		777	; tail
		778	pop ecx
		779	and ecx,BYTE 1
		780	jz .L7
		781	mov bl,[esi+0] ; blue
		782	mov al,[esi+1] ; green
		783	mov ah,[esi+2] ; red
		784	shr ah,3
		785	and al,11111000b
		786	shl eax,2
		787	shr bl,3
		788	add al,bl
		789	mov [edi+0],al
		790	mov [edi+1],ah
		791	add esi,BYTE 4
		792	add edi,BYTE 2
		793
9172	turbocat	794	.L7:
		795	retn
8210	maxcodehac	796
		797
		798
		799
		800	;; 32 BIT RGB TO 16 BIT BGR 555
		801
		802	_ConvertX86p32_16BGR555:
		803
		804	; check short
		805	cmp ecx,BYTE 16
		806	ja .L3
		807
		808
9172	turbocat	809	.L1: ; short loop
8210	maxcodehac	810	mov ah,[esi+0] ; blue
		811	mov al,[esi+1] ; green
		812	mov bl,[esi+2] ; red
		813	shr ah,3
		814	and al,11111000b
		815	shl eax,2
		816	shr bl,3
		817	add al,bl
		818	mov [edi+0],al
		819	mov [edi+1],ah
		820	add esi,BYTE 4
		821	add edi,BYTE 2
		822	dec ecx
		823	jnz .L1
9172	turbocat	824	.L2:
		825	retn
8210	maxcodehac	826
9172	turbocat	827	.L3: ; head
8210	maxcodehac	828	mov ebx,edi
		829	and ebx,BYTE 11b
		830	jz .L4
		831	mov ah,[esi+0] ; blue
		832	mov al,[esi+1] ; green
		833	mov bl,[esi+2] ; red
		834	shr ah,3
		835	and al,11111000b
		836	shl eax,2
		837	shr bl,3
		838	add al,bl
		839	mov [edi+0],al
		840	mov [edi+1],ah
		841	add esi,BYTE 4
		842	add edi,BYTE 2
		843	dec ecx
		844
9172	turbocat	845	.L4: ; save count
8210	maxcodehac	846	push ecx
		847
		848	; unroll twice
		849	shr ecx,1
		850
		851	; point arrays to end
		852	lea esi,[esi+ecx*8]
		853	lea edi,[edi+ecx*4]
		854
		855	; negative counter
		856	neg ecx
		857	jmp SHORT .L6
		858
9172	turbocat	859	.L5:
8210	maxcodehac	860	mov [edi+ecx*4-4],eax
9172	turbocat	861	.L6:
8210	maxcodehac	862	mov edx,[esi+ecx*8+4]
		863
		864	mov bh,[esi+ecx*8+4]
		865	mov ah,[esi+ecx*8]
		866
		867	shr bh,3
		868	mov al,[esi+ecx*8+1]
		869
		870	shr ah,3
		871	mov bl,[esi+ecx*8+5]
		872
		873	shl eax,2
		874	mov dl,[esi+ecx*8+2]
		875
		876	shl ebx,18
		877	and eax,00007FE0h
		878
		879	shr edx,3
		880	and ebx,07FE00000h
		881
		882	and edx,001F001Fh
		883	add eax,ebx
		884
		885	add eax,edx
		886	inc ecx
		887
		888	jnz .L5
		889
		890	mov [edi+ecx*4-4],eax
		891
		892	; tail
		893	pop ecx
		894	and ecx,BYTE 1
		895	jz .L7
		896	mov ah,[esi+0] ; blue
		897	mov al,[esi+1] ; green
		898	mov bl,[esi+2] ; red
		899	shr ah,3
		900	and al,11111000b
		901	shl eax,2
		902	shr bl,3
		903	add al,bl
		904	mov [edi+0],al
		905	mov [edi+1],ah
		906	add esi,BYTE 4
		907	add edi,BYTE 2
		908
9172	turbocat	909	.L7:
		910	retn
8210	maxcodehac	911
		912
		913
		914
		915
		916	;; FROM 32 BIT RGB to 8 BIT RGB (rrrgggbbb)
		917	;; This routine writes FOUR pixels at once (dword) and then, if they exist
		918	;; the trailing three pixels
		919	_ConvertX86p32_8RGB332:
		920
		921
9172	turbocat	922	.L_ALIGNED:
8210	maxcodehac	923	push ecx
		924
		925	shr ecx,2 ; We will draw 4 pixels at once
		926	jnz .L1
		927
		928	jmp .L2 ; short jump out of range :(
		929
		930	.L1:
		931	mov eax,[esi] ; first pair of pixels
		932	mov edx,[esi+4]
		933
		934	shr dl,6
		935	mov ebx,eax
		936
		937	shr al,6
		938	and ah,0e0h
		939
		940	shr ebx,16
		941	and dh,0e0h
		942
		943	shr ah,3
		944	and bl,0e0h
		945
		946	shr dh,3
		947
		948	or al,bl
		949
		950	mov ebx,edx
		951	or al,ah
		952
		953	shr ebx,16
		954	or dl,dh
		955
		956	and bl,0e0h
		957
		958	or dl,bl
		959
		960	mov ah,dl
		961
		962
		963
		964	mov ebx,[esi+8] ; second pair of pixels
		965
		966	mov edx,ebx
		967	and bh,0e0h
		968
		969	shr bl,6
		970	and edx,0e00000h
		971
		972	shr edx,16
		973
		974	shr bh,3
		975
		976	ror eax,16
		977	or bl,dl
		978
		979	mov edx,[esi+12]
		980	or bl,bh
		981
		982	mov al,bl
		983
		984	mov ebx,edx
		985	and dh,0e0h
		986
		987	shr dl,6
		988	and ebx,0e00000h
		989
		990	shr dh,3
		991	mov ah,dl
		992
		993	shr ebx,16
		994	or ah,dh
		995
		996	or ah,bl
		997
		998	rol eax,16
		999	add esi,BYTE 16
		1000
		1001	mov [edi],eax
		1002	add edi,BYTE 4
		1003
		1004	dec ecx
		1005	jz .L2 ; L1 out of range for short jump :(
		1006
		1007	jmp .L1
		1008	.L2:
		1009
		1010	pop ecx
		1011	and ecx,BYTE 3 ; mask out number of pixels to draw
		1012
		1013	jz .L4 ; Nothing to do anymore
		1014
		1015	.L3:
		1016	mov eax,[esi] ; single pixel conversion for trailing pixels
		1017
		1018	mov ebx,eax
		1019
		1020	shr al,6
		1021	and ah,0e0h
		1022
		1023	shr ebx,16
		1024
		1025	shr ah,3
		1026	and bl,0e0h
		1027
		1028	or al,ah
		1029	or al,bl
		1030
		1031	mov [edi],al
		1032
		1033	inc edi
		1034	add esi,BYTE 4
		1035
		1036	dec ecx
		1037	jnz .L3
		1038
		1039	.L4:
9172	turbocat	1040	retn
		1041
		1042	%ifidn __OUTPUT_FORMAT__,elf32
		1043	section .note.GNU-stack noalloc noexec nowrite progbits
		1044	%endif

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(root)/contrib/sdk/sources/SDL-1.2.2_newlib/src/hermes/x86p_32.asm – Rev 9172