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

Rev	Author	Line No.	Line
8210	maxcodehac	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	BITS 32
		14
9172	turbocat	15	%include "common.inc"
8210	maxcodehac	16
9172	turbocat	17	SDL_FUNC _ConvertX86p16_16BGR565
		18	SDL_FUNC _ConvertX86p16_16RGB555
		19	SDL_FUNC _ConvertX86p16_16BGR555
		20	SDL_FUNC _ConvertX86p16_8RGB332
		21
8210	maxcodehac	22	EXTERN _ConvertX86
		23
		24	SECTION .text
		25
		26	_ConvertX86p16_16BGR565:
		27
		28	; check short
		29	cmp ecx,BYTE 16
		30	ja .L3
		31
		32
9172	turbocat	33	.L1: ; short loop
8210	maxcodehac	34	mov al,[esi]
		35	mov ah,[esi+1]
		36	mov ebx,eax
		37	mov edx,eax
		38	shr eax,11
		39	and eax,BYTE 11111b
		40	and ebx,11111100000b
		41	shl edx,11
		42	add eax,ebx
		43	add eax,edx
		44	mov [edi],al
		45	mov [edi+1],ah
		46	add esi,BYTE 2
		47	add edi,BYTE 2
		48	dec ecx
		49	jnz .L1
9172	turbocat	50	.L2:
		51	retn
8210	maxcodehac	52
9172	turbocat	53	.L3: ; head
8210	maxcodehac	54	mov eax,edi
		55	and eax,BYTE 11b
		56	jz .L4
		57	mov al,[esi]
		58	mov ah,[esi+1]
		59	mov ebx,eax
		60	mov edx,eax
		61	shr eax,11
		62	and eax,BYTE 11111b
		63	and ebx,11111100000b
		64	shl edx,11
		65	add eax,ebx
		66	add eax,edx
		67	mov [edi],al
		68	mov [edi+1],ah
		69	add esi,BYTE 2
		70	add edi,BYTE 2
		71	dec ecx
		72
9172	turbocat	73	.L4: ; save count
8210	maxcodehac	74	push ecx
		75
		76	; unroll twice
		77	shr ecx,1
		78
		79	; point arrays to end
		80	lea esi,[esi+ecx*4]
		81	lea edi,[edi+ecx*4]
		82
		83	; negative counter
		84	neg ecx
		85	jmp SHORT .L6
		86
9172	turbocat	87	.L5: mov [edi+ecx*4-4],eax
		88	.L6: mov eax,[esi+ecx*4]
8210	maxcodehac	89
		90	mov ebx,[esi+ecx*4]
		91	and eax,07E007E0h
		92
		93	mov edx,[esi+ecx*4]
		94	and ebx,0F800F800h
		95
		96	shr ebx,11
		97	and edx,001F001Fh
		98
		99	shl edx,11
		100	add eax,ebx
		101
		102	add eax,edx
		103	inc ecx
		104
		105	jnz .L5
		106
		107	mov [edi+ecx*4-4],eax
		108
		109	; tail
		110	pop ecx
		111	and ecx,BYTE 1
		112	jz .L7
		113	mov al,[esi]
		114	mov ah,[esi+1]
		115	mov ebx,eax
		116	mov edx,eax
		117	shr eax,11
		118	and eax,BYTE 11111b
		119	and ebx,11111100000b
		120	shl edx,11
		121	add eax,ebx
		122	add eax,edx
		123	mov [edi],al
		124	mov [edi+1],ah
		125	add esi,BYTE 2
		126	add edi,BYTE 2
		127
9172	turbocat	128	.L7:
		129	retn
8210	maxcodehac	130
		131
		132
		133
		134
		135
		136	_ConvertX86p16_16RGB555:
		137
		138	; check short
		139	cmp ecx,BYTE 32
		140	ja .L3
		141
		142
9172	turbocat	143	.L1: ; short loop
8210	maxcodehac	144	mov al,[esi]
		145	mov ah,[esi+1]
		146	mov ebx,eax
		147	shr ebx,1
		148	and ebx, 0111111111100000b
		149	and eax,BYTE 0000000000011111b
		150	add eax,ebx
		151	mov [edi],al
		152	mov [edi+1],ah
		153	add esi,BYTE 2
		154	add edi,BYTE 2
		155	dec ecx
		156	jnz .L1
9172	turbocat	157	.L2:
		158	retn
8210	maxcodehac	159
9172	turbocat	160	.L3: ; head
8210	maxcodehac	161	mov eax,edi
		162	and eax,BYTE 11b
		163	jz .L4
		164	mov al,[esi]
		165	mov ah,[esi+1]
		166	mov ebx,eax
		167	shr ebx,1
		168	and ebx, 0111111111100000b
		169	and eax,BYTE 0000000000011111b
		170	add eax,ebx
		171	mov [edi],al
		172	mov [edi+1],ah
		173	add esi,BYTE 2
		174	add edi,BYTE 2
		175	dec ecx
		176
9172	turbocat	177	.L4: ; save ebp
8210	maxcodehac	178	push ebp
		179
		180	; save count
		181	push ecx
		182
		183	; unroll four times
		184	shr ecx,2
		185
		186	; point arrays to end
		187	lea esi,[esi+ecx*8]
		188	lea edi,[edi+ecx*8]
		189
		190	; negative counter
		191	xor ebp,ebp
		192	sub ebp,ecx
		193
9172	turbocat	194	.L5: mov eax,[esi+ebp*8] ; agi?
8210	maxcodehac	195	mov ecx,[esi+ebp*8+4]
		196
		197	mov ebx,eax
		198	mov edx,ecx
		199
		200	and eax,0FFC0FFC0h
		201	and ecx,0FFC0FFC0h
		202
		203	shr eax,1
		204	and ebx,001F001Fh
		205
		206	shr ecx,1
		207	and edx,001F001Fh
		208
		209	add eax,ebx
		210	add ecx,edx
		211
		212	mov [edi+ebp*8],eax
		213	mov [edi+ebp*8+4],ecx
		214
		215	inc ebp
		216	jnz .L5
		217
		218	; tail
		219	pop ecx
9172	turbocat	220	.L6: and ecx,BYTE 11b
8210	maxcodehac	221	jz .L7
		222	mov al,[esi]
		223	mov ah,[esi+1]
		224	mov ebx,eax
		225	shr ebx,1
		226	and ebx, 0111111111100000b
		227	and eax,BYTE 0000000000011111b
		228	add eax,ebx
		229	mov [edi],al
		230	mov [edi+1],ah
		231	add esi,BYTE 2
		232	add edi,BYTE 2
		233	dec ecx
		234	jmp SHORT .L6
		235
9172	turbocat	236	.L7: pop ebp
		237	retn
8210	maxcodehac	238
		239
		240
		241
		242
		243
		244	_ConvertX86p16_16BGR555:
		245
		246	; check short
		247	cmp ecx,BYTE 16
		248	ja .L3
		249
		250
9172	turbocat	251	.L1: ; short loop
8210	maxcodehac	252	mov al,[esi]
		253	mov ah,[esi+1]
		254	mov ebx,eax
		255	mov edx,eax
		256	shr eax,11
		257	and eax,BYTE 11111b
		258	shr ebx,1
		259	and ebx,1111100000b
		260	shl edx,10
		261	and edx,0111110000000000b
		262	add eax,ebx
		263	add eax,edx
		264	mov [edi],al
		265	mov [edi+1],ah
		266	add esi,BYTE 2
		267	add edi,BYTE 2
		268	dec ecx
		269	jnz .L1
9172	turbocat	270	.L2:
		271	retn
8210	maxcodehac	272
9172	turbocat	273	.L3: ; head
8210	maxcodehac	274	mov eax,edi
		275	and eax,BYTE 11b
		276	jz .L4
		277	mov al,[esi]
		278	mov ah,[esi+1]
		279	mov ebx,eax
		280	mov edx,eax
		281	shr eax,11
		282	and eax,BYTE 11111b
		283	shr ebx,1
		284	and ebx,1111100000b
		285	shl edx,10
		286	and edx,0111110000000000b
		287	add eax,ebx
		288	add eax,edx
		289	mov [edi],al
		290	mov [edi+1],ah
		291	add esi,BYTE 2
		292	add edi,BYTE 2
		293	dec ecx
		294
9172	turbocat	295	.L4: ; save count
8210	maxcodehac	296	push ecx
		297
		298	; unroll twice
		299	shr ecx,1
		300
		301	; point arrays to end
		302	lea esi,[esi+ecx*4]
		303	lea edi,[edi+ecx*4]
		304
		305	; negative counter
		306	neg ecx
		307	jmp SHORT .L6
		308
9172	turbocat	309	.L5: mov [edi+ecx*4-4],eax
		310	.L6: mov eax,[esi+ecx*4]
8210	maxcodehac	311
		312	shr eax,1
		313	mov ebx,[esi+ecx*4]
		314
		315	and eax,03E003E0h
		316	mov edx,[esi+ecx*4]
		317
		318	and ebx,0F800F800h
		319
		320	shr ebx,11
		321	and edx,001F001Fh
		322
		323	shl edx,10
		324	add eax,ebx
		325
		326	add eax,edx
		327	inc ecx
		328
		329	jnz .L5
		330
		331	mov [edi+ecx*4-4],eax
		332
		333	; tail
		334	pop ecx
		335	and ecx,BYTE 1
		336	jz .L7
		337	mov al,[esi]
		338	mov ah,[esi+1]
		339	mov ebx,eax
		340	mov edx,eax
		341	shr eax,11
		342	and eax,BYTE 11111b
		343	shr ebx,1
		344	and ebx,1111100000b
		345	shl edx,10
		346	and edx,0111110000000000b
		347	add eax,ebx
		348	add eax,edx
		349	mov [edi],al
		350	mov [edi+1],ah
		351	add esi,BYTE 2
		352	add edi,BYTE 2
		353
9172	turbocat	354	.L7:
		355	retn
8210	maxcodehac	356
		357
		358
		359
		360
		361
		362	_ConvertX86p16_8RGB332:
		363
		364	; check short
		365	cmp ecx,BYTE 16
		366	ja .L3
		367
		368
9172	turbocat	369	.L1: ; short loop
8210	maxcodehac	370	mov al,[esi+0]
		371	mov ah,[esi+1]
		372	mov ebx,eax
		373	mov edx,eax
		374	and eax,BYTE 11000b ; blue
		375	shr eax,3
		376	and ebx,11100000000b ; green
		377	shr ebx,6
		378	and edx,1110000000000000b ; red
		379	shr edx,8
		380	add eax,ebx
		381	add eax,edx
		382	mov [edi],al
		383	add esi,BYTE 2
		384	inc edi
		385	dec ecx
		386	jnz .L1
9172	turbocat	387	.L2:
		388	retn
8210	maxcodehac	389
9172	turbocat	390	.L3: mov eax,edi
8210	maxcodehac	391	and eax,BYTE 11b
		392	jz .L4
		393	mov al,[esi+0]
		394	mov ah,[esi+1]
		395	mov ebx,eax
		396	mov edx,eax
		397	and eax,BYTE 11000b ; blue
		398	shr eax,3
		399	and ebx,11100000000b ; green
		400	shr ebx,6
		401	and edx,1110000000000000b ; red
		402	shr edx,8
		403	add eax,ebx
		404	add eax,edx
		405	mov [edi],al
		406	add esi,BYTE 2
		407	inc edi
		408	dec ecx
		409	jmp SHORT .L3
		410
9172	turbocat	411	.L4: ; save ebp
8210	maxcodehac	412	push ebp
		413
		414	; save count
		415	push ecx
		416
		417	; unroll 4 times
		418	shr ecx,2
		419
		420	; prestep
		421	mov dl,[esi+0]
		422	mov bl,[esi+1]
		423	mov dh,[esi+2]
		424
9172	turbocat	425	.L5: shl edx,16
8210	maxcodehac	426	mov bh,[esi+3]
		427
		428	shl ebx,16
		429	mov dl,[esi+4]
		430
		431	mov dh,[esi+6]
		432	mov bl,[esi+5]
		433
		434	and edx,00011000000110000001100000011000b
		435	mov bh,[esi+7]
		436
		437	ror edx,16+3
		438	mov eax,ebx ; setup eax for reds
		439
		440	and ebx,00000111000001110000011100000111b
		441	and eax,11100000111000001110000011100000b ; reds
		442
		443	ror ebx,16-2
		444	add esi,BYTE 8
		445
		446	ror eax,16
		447	add edi,BYTE 4
		448
		449	add eax,ebx
		450	mov bl,[esi+1] ; greens
		451
		452	add eax,edx
		453	mov dl,[esi+0] ; blues
		454
		455	mov [edi-4],eax
		456	mov dh,[esi+2]
		457
		458	dec ecx
		459	jnz .L5
		460
		461	; check tail
		462	pop ecx
		463	and ecx,BYTE 11b
		464	jz .L7
		465
9172	turbocat	466	.L6: ; tail
8210	maxcodehac	467	mov al,[esi+0]
		468	mov ah,[esi+1]
		469	mov ebx,eax
		470	mov edx,eax
		471	and eax,BYTE 11000b ; blue
		472	shr eax,3
		473	and ebx,11100000000b ; green
		474	shr ebx,6
		475	and edx,1110000000000000b ; red
		476	shr edx,8
		477	add eax,ebx
		478	add eax,edx
		479	mov [edi],al
		480	add esi,BYTE 2
		481	inc edi
		482	dec ecx
		483	jnz .L6
		484
9172	turbocat	485	.L7: pop ebp
		486	retn
8210	maxcodehac	487
9172	turbocat	488	%ifidn __OUTPUT_FORMAT__,elf32
		489	section .note.GNU-stack noalloc noexec nowrite progbits
		490	%endif

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(root)/contrib/sdk/sources/SDL-1.2.2_newlib/src/hermes/x86p_16.asm – Rev 9172