WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/SDL-1.2.2/src/hermes/x86p_16.asm

Rev	Author	Line No.	Line
5131	clevermous	1	;
		2	; x86 format converters for HERMES
		3	; Copyright (c) 1998 Glenn Fielder (gaffer@gaffer.org)
		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	; Routines adjusted for Hermes by Christian Nentwich (brn@eleet.mcb.at)
		10	; Used with permission.
		11	;
		12
		13
		14	BITS 32
		15
		16	GLOBAL _ConvertX86p16_32RGB888
		17	GLOBAL _ConvertX86p16_32BGR888
		18	GLOBAL _ConvertX86p16_32RGBA888
		19	GLOBAL _ConvertX86p16_32BGRA888
		20	GLOBAL _ConvertX86p16_24RGB888
		21	GLOBAL _ConvertX86p16_24BGR888
		22	GLOBAL _ConvertX86p16_16BGR565
		23	GLOBAL _ConvertX86p16_16RGB555
		24	GLOBAL _ConvertX86p16_16BGR555
		25	GLOBAL _ConvertX86p16_8RGB332
		26
		27	EXTERN _ConvertX86
		28	EXTERN _x86return
		29
		30
		31	SECTION .text
		32
		33
		34
		35	_ConvertX86p16_16BGR565:
		36
		37	; check short
		38	cmp ecx,BYTE 16
		39	ja .L3
		40
		41
		42	.L1 ; short loop
		43	mov al,[esi]
		44	mov ah,[esi+1]
		45	mov ebx,eax
		46	mov edx,eax
		47	shr eax,11
		48	and eax,BYTE 11111b
		49	and ebx,11111100000b
		50	shl edx,11
		51	add eax,ebx
		52	add eax,edx
		53	mov [edi],al
		54	mov [edi+1],ah
		55	add esi,BYTE 2
		56	add edi,BYTE 2
		57	dec ecx
		58	jnz .L1
		59	.L2
		60	jmp _x86return
		61
		62	.L3 ; head
		63	mov eax,edi
		64	and eax,BYTE 11b
		65	jz .L4
		66	mov al,[esi]
		67	mov ah,[esi+1]
		68	mov ebx,eax
		69	mov edx,eax
		70	shr eax,11
		71	and eax,BYTE 11111b
		72	and ebx,11111100000b
		73	shl edx,11
		74	add eax,ebx
		75	add eax,edx
		76	mov [edi],al
		77	mov [edi+1],ah
		78	add esi,BYTE 2
		79	add edi,BYTE 2
		80	dec ecx
		81
		82	.L4 ; save count
		83	push ecx
		84
		85	; unroll twice
		86	shr ecx,1
		87
		88	; point arrays to end
		89	lea esi,[esi+ecx*4]
		90	lea edi,[edi+ecx*4]
		91
		92	; negative counter
		93	neg ecx
		94	jmp SHORT .L6
		95
		96	.L5 mov [edi+ecx*4-4],eax
		97	.L6 mov eax,[esi+ecx*4]
		98
		99	mov ebx,[esi+ecx*4]
		100	and eax,07E007E0h
		101
		102	mov edx,[esi+ecx*4]
		103	and ebx,0F800F800h
		104
		105	shr ebx,11
		106	and edx,001F001Fh
		107
		108	shl edx,11
		109	add eax,ebx
		110
		111	add eax,edx
		112	inc ecx
		113
		114	jnz .L5
		115
		116	mov [edi+ecx*4-4],eax
		117
		118	; tail
		119	pop ecx
		120	and ecx,BYTE 1
		121	jz .L7
		122	mov al,[esi]
		123	mov ah,[esi+1]
		124	mov ebx,eax
		125	mov edx,eax
		126	shr eax,11
		127	and eax,BYTE 11111b
		128	and ebx,11111100000b
		129	shl edx,11
		130	add eax,ebx
		131	add eax,edx
		132	mov [edi],al
		133	mov [edi+1],ah
		134	add esi,BYTE 2
		135	add edi,BYTE 2
		136
		137	.L7
		138	jmp _x86return
		139
		140
		141
		142
		143
		144
		145	_ConvertX86p16_16RGB555:
		146
		147	; check short
		148	cmp ecx,BYTE 32
		149	ja .L3
		150
		151
		152	.L1 ; short loop
		153	mov al,[esi]
		154	mov ah,[esi+1]
		155	mov ebx,eax
		156	shr ebx,1
		157	and ebx, 0111111111100000b
		158	and eax,BYTE 0000000000011111b
		159	add eax,ebx
		160	mov [edi],al
		161	mov [edi+1],ah
		162	add esi,BYTE 2
		163	add edi,BYTE 2
		164	dec ecx
		165	jnz .L1
		166	.L2
		167	jmp _x86return
		168
		169	.L3 ; head
		170	mov eax,edi
		171	and eax,BYTE 11b
		172	jz .L4
		173	mov al,[esi]
		174	mov ah,[esi+1]
		175	mov ebx,eax
		176	shr ebx,1
		177	and ebx, 0111111111100000b
		178	and eax,BYTE 0000000000011111b
		179	add eax,ebx
		180	mov [edi],al
		181	mov [edi+1],ah
		182	add esi,BYTE 2
		183	add edi,BYTE 2
		184	dec ecx
		185
		186	.L4 ; save ebp
		187	push ebp
		188
		189	; save count
		190	push ecx
		191
		192	; unroll four times
		193	shr ecx,2
		194
		195	; point arrays to end
		196	lea esi,[esi+ecx*8]
		197	lea edi,[edi+ecx*8]
		198
		199	; negative counter
		200	xor ebp,ebp
		201	sub ebp,ecx
		202
		203	.L5 mov eax,[esi+ebp*8] ; agi?
		204	mov ecx,[esi+ebp*8+4]
		205
		206	mov ebx,eax
		207	mov edx,ecx
		208
		209	and eax,0FFC0FFC0h
		210	and ecx,0FFC0FFC0h
		211
		212	shr eax,1
		213	and ebx,001F001Fh
		214
		215	shr ecx,1
		216	and edx,001F001Fh
		217
		218	add eax,ebx
		219	add ecx,edx
		220
		221	mov [edi+ebp*8],eax
		222	mov [edi+ebp*8+4],ecx
		223
		224	inc ebp
		225	jnz .L5
		226
		227	; tail
		228	pop ecx
		229	.L6 and ecx,BYTE 11b
		230	jz .L7
		231	mov al,[esi]
		232	mov ah,[esi+1]
		233	mov ebx,eax
		234	shr ebx,1
		235	and ebx, 0111111111100000b
		236	and eax,BYTE 0000000000011111b
		237	add eax,ebx
		238	mov [edi],al
		239	mov [edi+1],ah
		240	add esi,BYTE 2
		241	add edi,BYTE 2
		242	dec ecx
		243	jmp SHORT .L6
		244
		245	.L7 pop ebp
		246	jmp _x86return
		247
		248
		249
		250
		251
		252
		253	_ConvertX86p16_16BGR555:
		254
		255	; check short
		256	cmp ecx,BYTE 16
		257	ja .L3
		258
		259
		260	.L1 ; short loop
		261	mov al,[esi]
		262	mov ah,[esi+1]
		263	mov ebx,eax
		264	mov edx,eax
		265	shr eax,11
		266	and eax,BYTE 11111b
		267	shr ebx,1
		268	and ebx,1111100000b
		269	shl edx,10
		270	and edx,0111110000000000b
		271	add eax,ebx
		272	add eax,edx
		273	mov [edi],al
		274	mov [edi+1],ah
		275	add esi,BYTE 2
		276	add edi,BYTE 2
		277	dec ecx
		278	jnz .L1
		279	.L2
		280	jmp _x86return
		281
		282	.L3 ; head
		283	mov eax,edi
		284	and eax,BYTE 11b
		285	jz .L4
		286	mov al,[esi]
		287	mov ah,[esi+1]
		288	mov ebx,eax
		289	mov edx,eax
		290	shr eax,11
		291	and eax,BYTE 11111b
		292	shr ebx,1
		293	and ebx,1111100000b
		294	shl edx,10
		295	and edx,0111110000000000b
		296	add eax,ebx
		297	add eax,edx
		298	mov [edi],al
		299	mov [edi+1],ah
		300	add esi,BYTE 2
		301	add edi,BYTE 2
		302	dec ecx
		303
		304	.L4 ; save count
		305	push ecx
		306
		307	; unroll twice
		308	shr ecx,1
		309
		310	; point arrays to end
		311	lea esi,[esi+ecx*4]
		312	lea edi,[edi+ecx*4]
		313
		314	; negative counter
		315	neg ecx
		316	jmp SHORT .L6
		317
		318	.L5 mov [edi+ecx*4-4],eax
		319	.L6 mov eax,[esi+ecx*4]
		320
		321	shr eax,1
		322	mov ebx,[esi+ecx*4]
		323
		324	and eax,03E003E0h
		325	mov edx,[esi+ecx*4]
		326
		327	and ebx,0F800F800h
		328
		329	shr ebx,11
		330	and edx,001F001Fh
		331
		332	shl edx,10
		333	add eax,ebx
		334
		335	add eax,edx
		336	inc ecx
		337
		338	jnz .L5
		339
		340	mov [edi+ecx*4-4],eax
		341
		342	; tail
		343	pop ecx
		344	and ecx,BYTE 1
		345	jz .L7
		346	mov al,[esi]
		347	mov ah,[esi+1]
		348	mov ebx,eax
		349	mov edx,eax
		350	shr eax,11
		351	and eax,BYTE 11111b
		352	shr ebx,1
		353	and ebx,1111100000b
		354	shl edx,10
		355	and edx,0111110000000000b
		356	add eax,ebx
		357	add eax,edx
		358	mov [edi],al
		359	mov [edi+1],ah
		360	add esi,BYTE 2
		361	add edi,BYTE 2
		362
		363	.L7
		364	jmp _x86return
		365
		366
		367
		368
		369
		370
		371	_ConvertX86p16_8RGB332:
		372
		373	; check short
		374	cmp ecx,BYTE 16
		375	ja .L3
		376
		377
		378	.L1 ; short loop
		379	mov al,[esi+0]
		380	mov ah,[esi+1]
		381	mov ebx,eax
		382	mov edx,eax
		383	and eax,BYTE 11000b ; blue
		384	shr eax,3
		385	and ebx,11100000000b ; green
		386	shr ebx,6
		387	and edx,1110000000000000b ; red
		388	shr edx,8
		389	add eax,ebx
		390	add eax,edx
		391	mov [edi],al
		392	add esi,BYTE 2
		393	inc edi
		394	dec ecx
		395	jnz .L1
		396	.L2
		397	jmp _x86return
		398
		399	.L3 mov eax,edi
		400	and eax,BYTE 11b
		401	jz .L4
		402	mov al,[esi+0]
		403	mov ah,[esi+1]
		404	mov ebx,eax
		405	mov edx,eax
		406	and eax,BYTE 11000b ; blue
		407	shr eax,3
		408	and ebx,11100000000b ; green
		409	shr ebx,6
		410	and edx,1110000000000000b ; red
		411	shr edx,8
		412	add eax,ebx
		413	add eax,edx
		414	mov [edi],al
		415	add esi,BYTE 2
		416	inc edi
		417	dec ecx
		418	jmp SHORT .L3
		419
		420	.L4 ; save ebp
		421	push ebp
		422
		423	; save count
		424	push ecx
		425
		426	; unroll 4 times
		427	shr ecx,2
		428
		429	; prestep
		430	mov dl,[esi+0]
		431	mov bl,[esi+1]
		432	mov dh,[esi+2]
		433
		434	.L5 shl edx,16
		435	mov bh,[esi+3]
		436
		437	shl ebx,16
		438	mov dl,[esi+4]
		439
		440	mov dh,[esi+6]
		441	mov bl,[esi+5]
		442
		443	and edx,00011000000110000001100000011000b
		444	mov bh,[esi+7]
		445
		446	ror edx,16+3
		447	mov eax,ebx ; setup eax for reds
		448
		449	and ebx,00000111000001110000011100000111b
		450	and eax,11100000111000001110000011100000b ; reds
		451
		452	ror ebx,16-2
		453	add esi,BYTE 8
		454
		455	ror eax,16
		456	add edi,BYTE 4
		457
		458	add eax,ebx
		459	mov bl,[esi+1] ; greens
		460
		461	add eax,edx
		462	mov dl,[esi+0] ; blues
		463
		464	mov [edi-4],eax
		465	mov dh,[esi+2]
		466
		467	dec ecx
		468	jnz .L5
		469
		470	; check tail
		471	pop ecx
		472	and ecx,BYTE 11b
		473	jz .L7
		474
		475	.L6 ; tail
		476	mov al,[esi+0]
		477	mov ah,[esi+1]
		478	mov ebx,eax
		479	mov edx,eax
		480	and eax,BYTE 11000b ; blue
		481	shr eax,3
		482	and ebx,11100000000b ; green
		483	shr ebx,6
		484	and edx,1110000000000000b ; red
		485	shr edx,8
		486	add eax,ebx
		487	add eax,edx
		488	mov [edi],al
		489	add esi,BYTE 2
		490	inc edi
		491	dec ecx
		492	jnz .L6
		493
		494	.L7 pop ebp
		495	jmp _x86return
		496

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(root)/contrib/sdk/sources/SDL-1.2.2/src/hermes/x86p_16.asm – Rev 5131