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
9202	turbocat	22	SDL_FUNC ConvertX86p16_16BGR565
		23	SDL_FUNC ConvertX86p16_16RGB555
		24	SDL_FUNC ConvertX86p16_16BGR555
		25	SDL_FUNC ConvertX86p16_8RGB332
		26
		27
8210	maxcodehac	28	EXTERN _ConvertX86
9202	turbocat	29	EXTERN ConvertX86
8210	maxcodehac	30
		31	SECTION .text
		32
9202	turbocat	33	ConvertX86p16_16BGR565:
8210	maxcodehac	34	_ConvertX86p16_16BGR565:
		35
		36	; check short
		37	cmp ecx,BYTE 16
		38	ja .L3
		39
		40
9172	turbocat	41	.L1: ; short loop
8210	maxcodehac	42	mov al,[esi]
		43	mov ah,[esi+1]
		44	mov ebx,eax
		45	mov edx,eax
		46	shr eax,11
		47	and eax,BYTE 11111b
		48	and ebx,11111100000b
		49	shl edx,11
		50	add eax,ebx
		51	add eax,edx
		52	mov [edi],al
		53	mov [edi+1],ah
		54	add esi,BYTE 2
		55	add edi,BYTE 2
		56	dec ecx
		57	jnz .L1
9172	turbocat	58	.L2:
		59	retn
8210	maxcodehac	60
9172	turbocat	61	.L3: ; head
8210	maxcodehac	62	mov eax,edi
		63	and eax,BYTE 11b
		64	jz .L4
		65	mov al,[esi]
		66	mov ah,[esi+1]
		67	mov ebx,eax
		68	mov edx,eax
		69	shr eax,11
		70	and eax,BYTE 11111b
		71	and ebx,11111100000b
		72	shl edx,11
		73	add eax,ebx
		74	add eax,edx
		75	mov [edi],al
		76	mov [edi+1],ah
		77	add esi,BYTE 2
		78	add edi,BYTE 2
		79	dec ecx
		80
9172	turbocat	81	.L4: ; save count
8210	maxcodehac	82	push ecx
		83
		84	; unroll twice
		85	shr ecx,1
		86
		87	; point arrays to end
		88	lea esi,[esi+ecx*4]
		89	lea edi,[edi+ecx*4]
		90
		91	; negative counter
		92	neg ecx
		93	jmp SHORT .L6
		94
9172	turbocat	95	.L5: mov [edi+ecx*4-4],eax
		96	.L6: mov eax,[esi+ecx*4]
8210	maxcodehac	97
		98	mov ebx,[esi+ecx*4]
		99	and eax,07E007E0h
		100
		101	mov edx,[esi+ecx*4]
		102	and ebx,0F800F800h
		103
		104	shr ebx,11
		105	and edx,001F001Fh
		106
		107	shl edx,11
		108	add eax,ebx
		109
		110	add eax,edx
		111	inc ecx
		112
		113	jnz .L5
		114
		115	mov [edi+ecx*4-4],eax
		116
		117	; tail
		118	pop ecx
		119	and ecx,BYTE 1
		120	jz .L7
		121	mov al,[esi]
		122	mov ah,[esi+1]
		123	mov ebx,eax
		124	mov edx,eax
		125	shr eax,11
		126	and eax,BYTE 11111b
		127	and ebx,11111100000b
		128	shl edx,11
		129	add eax,ebx
		130	add eax,edx
		131	mov [edi],al
		132	mov [edi+1],ah
		133	add esi,BYTE 2
		134	add edi,BYTE 2
		135
9172	turbocat	136	.L7:
		137	retn
8210	maxcodehac	138
9202	turbocat	139	ConvertX86p16_16RGB555:
8210	maxcodehac	140	_ConvertX86p16_16RGB555:
		141
		142	; check short
		143	cmp ecx,BYTE 32
		144	ja .L3
		145
		146
9172	turbocat	147	.L1: ; short loop
8210	maxcodehac	148	mov al,[esi]
		149	mov ah,[esi+1]
		150	mov ebx,eax
		151	shr ebx,1
		152	and ebx, 0111111111100000b
		153	and eax,BYTE 0000000000011111b
		154	add eax,ebx
		155	mov [edi],al
		156	mov [edi+1],ah
		157	add esi,BYTE 2
		158	add edi,BYTE 2
		159	dec ecx
		160	jnz .L1
9172	turbocat	161	.L2:
		162	retn
8210	maxcodehac	163
9172	turbocat	164	.L3: ; head
8210	maxcodehac	165	mov eax,edi
		166	and eax,BYTE 11b
		167	jz .L4
		168	mov al,[esi]
		169	mov ah,[esi+1]
		170	mov ebx,eax
		171	shr ebx,1
		172	and ebx, 0111111111100000b
		173	and eax,BYTE 0000000000011111b
		174	add eax,ebx
		175	mov [edi],al
		176	mov [edi+1],ah
		177	add esi,BYTE 2
		178	add edi,BYTE 2
		179	dec ecx
		180
9172	turbocat	181	.L4: ; save ebp
8210	maxcodehac	182	push ebp
		183
		184	; save count
		185	push ecx
		186
		187	; unroll four times
		188	shr ecx,2
		189
		190	; point arrays to end
		191	lea esi,[esi+ecx*8]
		192	lea edi,[edi+ecx*8]
		193
		194	; negative counter
		195	xor ebp,ebp
		196	sub ebp,ecx
		197
9172	turbocat	198	.L5: mov eax,[esi+ebp*8] ; agi?
8210	maxcodehac	199	mov ecx,[esi+ebp*8+4]
		200
		201	mov ebx,eax
		202	mov edx,ecx
		203
		204	and eax,0FFC0FFC0h
		205	and ecx,0FFC0FFC0h
		206
		207	shr eax,1
		208	and ebx,001F001Fh
		209
		210	shr ecx,1
		211	and edx,001F001Fh
		212
		213	add eax,ebx
		214	add ecx,edx
		215
		216	mov [edi+ebp*8],eax
		217	mov [edi+ebp*8+4],ecx
		218
		219	inc ebp
		220	jnz .L5
		221
		222	; tail
		223	pop ecx
9172	turbocat	224	.L6: and ecx,BYTE 11b
8210	maxcodehac	225	jz .L7
		226	mov al,[esi]
		227	mov ah,[esi+1]
		228	mov ebx,eax
		229	shr ebx,1
		230	and ebx, 0111111111100000b
		231	and eax,BYTE 0000000000011111b
		232	add eax,ebx
		233	mov [edi],al
		234	mov [edi+1],ah
		235	add esi,BYTE 2
		236	add edi,BYTE 2
		237	dec ecx
		238	jmp SHORT .L6
		239
9172	turbocat	240	.L7: pop ebp
		241	retn
8210	maxcodehac	242
9202	turbocat	243	ConvertX86p16_16BGR555:
8210	maxcodehac	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
9202	turbocat	361	ConvertX86p16_8RGB332:
8210	maxcodehac	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 9202