SDL: src/stdlib/SDL_stdlib.c@204be4fc2726 (annotated)

slouken@1330	1	/*
slouken@1330	2	SDL - Simple DirectMedia Layer
slouken@1330	3	Copyright (C) 1997-2006 Sam Lantinga
slouken@1330	4
slouken@1330	5	This library is free software; you can redistribute it and/or
slouken@1330	6	modify it under the terms of the GNU Lesser General Public
slouken@1330	7	License as published by the Free Software Foundation; either
slouken@1330	8	version 2.1 of the License, or (at your option) any later version.
slouken@1330	9
slouken@1330	10	This library is distributed in the hope that it will be useful,
slouken@1330	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
slouken@1330	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
slouken@1330	13	Lesser General Public License for more details.
slouken@1330	14
slouken@1330	15	You should have received a copy of the GNU Lesser General Public
slouken@1330	16	License along with this library; if not, write to the Free Software
slouken@1330	17	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
slouken@1330	18
slouken@1330	19	Sam Lantinga
slouken@1330	20	slouken@libsdl.org
slouken@1330	21	*/
slouken@1402	22	#include "SDL_config.h"
slouken@1330	23
slouken@1330	24	/* This file contains portable stdlib functions for SDL */
slouken@1330	25
slouken@1354	26	#include "SDL_stdinc.h"
slouken@1330	27
slouken@1330	28	#ifndef HAVE_LIBC
slouken@1330	29	/* These are some C runtime intrinsics that need to be defined */
slouken@1330	30
slouken@1330	31	#if defined(_MSC_VER)
slouken@1330	32
slouken@1433	33	#ifndef __FLTUSED__
slouken@1433	34	#define __FLTUSED__
slouken@1433	35	#ifdef __cplusplus
slouken@1895	36	extern "C"
slouken@1433	37	#endif
slouken@1895	38	__declspec(selectany)
slouken@1895	39	int _fltused = 1;
slouken@1433	40	#endif
slouken@1433	41
slouken@1346	42	/* Float to long */
slouken@1895	43	void __declspec(naked) _ftol()
slouken@1345	44	{
slouken@1895	45	/* INDENT-OFF */
slouken@1895	46	__asm {
slouken@1895	47	push ebp
slouken@1895	48	mov ebp,esp
slouken@1895	49	sub esp,20h
slouken@1895	50	and esp,0FFFFFFF0h
slouken@1895	51	fld st(0)
slouken@1895	52	fst dword ptr [esp+18h]
slouken@1895	53	fistp qword ptr [esp+10h]
slouken@1895	54	fild qword ptr [esp+10h]
slouken@1895	55	mov edx,dword ptr [esp+18h]
slouken@1895	56	mov eax,dword ptr [esp+10h]
slouken@1895	57	test eax,eax
slouken@1895	58	je integer_QnaN_or_zero
slouken@1346	59	arg_is_not_integer_QnaN:
slouken@1895	60	fsubp st(1),st
slouken@1895	61	test edx,edx
slouken@1895	62	jns positive
slouken@1895	63	fstp dword ptr [esp]
slouken@1895	64	mov ecx,dword ptr [esp]
slouken@1895	65	xor ecx,80000000h
slouken@1895	66	add ecx,7FFFFFFFh
slouken@1895	67	adc eax,0
slouken@1895	68	mov edx,dword ptr [esp+14h]
slouken@1895	69	adc edx,0
slouken@1895	70	jmp localexit
slouken@1346	71	positive:
slouken@1895	72	fstp dword ptr [esp]
slouken@1895	73	mov ecx,dword ptr [esp]
slouken@1895	74	add ecx,7FFFFFFFh
slouken@1895	75	sbb eax,0
slouken@1895	76	mov edx,dword ptr [esp+14h]
slouken@1895	77	sbb edx,0
slouken@1895	78	jmp localexit
slouken@1346	79	integer_QnaN_or_zero:
slouken@1895	80	mov edx,dword ptr [esp+14h]
slouken@1895	81	test edx,7FFFFFFFh
slouken@1895	82	jne arg_is_not_integer_QnaN
slouken@1895	83	fstp dword ptr [esp+18h]
slouken@1895	84	fstp dword ptr [esp+18h]
slouken@1346	85	localexit:
slouken@1895	86	leave
slouken@1895	87	ret
slouken@1895	88	}
slouken@1895	89	/* INDENT-ON */
slouken@1345	90	}
slouken@1895	91
slouken@1895	92	void
slouken@1895	93	__declspec(naked)
slouken@1895	94	_ftol2_sse()
slouken@1330	95	{
slouken@1895	96	_ftol();
slouken@1330	97	}
slouken@1330	98
slouken@1346	99	/* 64-bit math operators for 32-bit systems */
slouken@1895	100	void
slouken@1895	101	__declspec(naked)
slouken@1895	102	_allmul()
slouken@1330	103	{
slouken@1895	104	/* INDENT-OFF */
slouken@1895	105	__asm {
slouken@1895	106	push ebp
slouken@1895	107	mov ebp,esp
slouken@1895	108	push edi
slouken@1895	109	push esi
slouken@1895	110	push ebx
slouken@1895	111	sub esp,0Ch
slouken@1895	112	mov eax,dword ptr [ebp+10h]
slouken@1895	113	mov edi,dword ptr [ebp+8]
slouken@1895	114	mov ebx,eax
slouken@1895	115	mov esi,eax
slouken@1895	116	sar esi,1Fh
slouken@1895	117	mov eax,dword ptr [ebp+8]
slouken@1895	118	mul ebx
slouken@1895	119	imul edi,esi
slouken@1895	120	mov ecx,edx
slouken@1895	121	mov dword ptr [ebp-18h],eax
slouken@1895	122	mov edx,dword ptr [ebp+0Ch]
slouken@1895	123	add ecx,edi
slouken@1895	124	imul ebx,edx
slouken@1895	125	mov eax,dword ptr [ebp-18h]
slouken@1895	126	lea ebx,[ebx+ecx]
slouken@1895	127	mov dword ptr [ebp-14h],ebx
slouken@1895	128	mov edx,dword ptr [ebp-14h]
slouken@1895	129	add esp,0Ch
slouken@1895	130	pop ebx
slouken@1895	131	pop esi
slouken@1895	132	pop edi
slouken@1895	133	pop ebp
slouken@1895	134	ret
slouken@1895	135	}
slouken@1895	136	/* INDENT-ON */
slouken@1330	137	}
slouken@2735	138
slouken@1895	139	void
slouken@1895	140	__declspec(naked)
slouken@1895	141	_alldiv()
slouken@1330	142	{
slouken@1895	143	/* INDENT-OFF */
slouken@1895	144	__asm {
slouken@1895	145	push edi
slouken@1895	146	push esi
slouken@1895	147	push ebx
slouken@1895	148	xor edi,edi
slouken@1895	149	mov eax,dword ptr [esp+14h]
slouken@1895	150	or eax,eax
slouken@1895	151	jge L1
slouken@1895	152	inc edi
slouken@1895	153	mov edx,dword ptr [esp+10h]
slouken@1895	154	neg eax
slouken@1895	155	neg edx
slouken@1895	156	sbb eax,0
slouken@1895	157	mov dword ptr [esp+14h],eax
slouken@1895	158	mov dword ptr [esp+10h],edx
slouken@1346	159	L1:
slouken@1895	160	mov eax,dword ptr [esp+1Ch]
slouken@1895	161	or eax,eax
slouken@1895	162	jge L2
slouken@1895	163	inc edi
slouken@1895	164	mov edx,dword ptr [esp+18h]
slouken@1895	165	neg eax
slouken@1895	166	neg edx
slouken@1895	167	sbb eax,0
slouken@1895	168	mov dword ptr [esp+1Ch],eax
slouken@1895	169	mov dword ptr [esp+18h],edx
slouken@1346	170	L2:
slouken@1895	171	or eax,eax
slouken@1895	172	jne L3
slouken@1895	173	mov ecx,dword ptr [esp+18h]
slouken@1895	174	mov eax,dword ptr [esp+14h]
slouken@1895	175	xor edx,edx
slouken@1895	176	div ecx
slouken@1895	177	mov ebx,eax
slouken@1895	178	mov eax,dword ptr [esp+10h]
slouken@1895	179	div ecx
slouken@1895	180	mov edx,ebx
slouken@1895	181	jmp L4
slouken@1346	182	L3:
slouken@1895	183	mov ebx,eax
slouken@1895	184	mov ecx,dword ptr [esp+18h]
slouken@1895	185	mov edx,dword ptr [esp+14h]
slouken@1895	186	mov eax,dword ptr [esp+10h]
slouken@1346	187	L5:
slouken@1895	188	shr ebx,1
slouken@1895	189	rcr ecx,1
slouken@1895	190	shr edx,1
slouken@1895	191	rcr eax,1
slouken@1895	192	or ebx,ebx
slouken@1895	193	jne L5
slouken@1895	194	div ecx
slouken@1895	195	mov esi,eax
slouken@1895	196	mul dword ptr [esp+1Ch]
slouken@1895	197	mov ecx,eax
slouken@1895	198	mov eax,dword ptr [esp+18h]
slouken@1895	199	mul esi
slouken@1895	200	add edx,ecx
slouken@1895	201	jb L6
slouken@1895	202	cmp edx,dword ptr [esp+14h]
slouken@1895	203	ja L6
slouken@1895	204	jb L7
slouken@1895	205	cmp eax,dword ptr [esp+10h]
slouken@1895	206	jbe L7
slouken@1346	207	L6:
slouken@1895	208	dec esi
slouken@1346	209	L7:
slouken@1895	210	xor edx,edx
slouken@1895	211	mov eax,esi
slouken@1346	212	L4:
slouken@1895	213	dec edi
slouken@1895	214	jne L8
slouken@1895	215	neg edx
slouken@1895	216	neg eax
slouken@1895	217	sbb edx,0
slouken@1346	218	L8:
slouken@1895	219	pop ebx
slouken@1895	220	pop esi
slouken@1895	221	pop edi
slouken@1895	222	ret 10h
slouken@1895	223	}
slouken@1895	224	/* INDENT-ON */
slouken@1330	225	}
slouken@2735	226
slouken@1895	227	void
slouken@1895	228	__declspec(naked)
slouken@1895	229	_aulldiv()
slouken@1330	230	{
slouken@1895	231	/* INDENT-OFF */
slouken@1895	232	__asm {
slouken@1895	233	push ebx
slouken@1895	234	push esi
slouken@1895	235	mov eax,dword ptr [esp+18h]
slouken@1895	236	or eax,eax
slouken@1895	237	jne L1
slouken@1895	238	mov ecx,dword ptr [esp+14h]
slouken@1895	239	mov eax,dword ptr [esp+10h]
slouken@1895	240	xor edx,edx
slouken@1895	241	div ecx
slouken@1895	242	mov ebx,eax
slouken@1895	243	mov eax,dword ptr [esp+0Ch]
slouken@1895	244	div ecx
slouken@1895	245	mov edx,ebx
slouken@1895	246	jmp L2
slouken@1346	247	L1:
slouken@1895	248	mov ecx,eax
slouken@1895	249	mov ebx,dword ptr [esp+14h]
slouken@1895	250	mov edx,dword ptr [esp+10h]
slouken@1895	251	mov eax,dword ptr [esp+0Ch]
slouken@1346	252	L3:
slouken@1895	253	shr ecx,1
slouken@1895	254	rcr ebx,1
slouken@1895	255	shr edx,1
slouken@1895	256	rcr eax,1
slouken@1895	257	or ecx,ecx
slouken@1895	258	jne L3
slouken@1895	259	div ebx
slouken@1895	260	mov esi,eax
slouken@1895	261	mul dword ptr [esp+18h]
slouken@1895	262	mov ecx,eax
slouken@1895	263	mov eax,dword ptr [esp+14h]
slouken@1895	264	mul esi
slouken@1895	265	add edx,ecx
slouken@1895	266	jb L4
slouken@1895	267	cmp edx,dword ptr [esp+10h]
slouken@1895	268	ja L4
slouken@1895	269	jb L5
slouken@1895	270	cmp eax,dword ptr [esp+0Ch]
slouken@1895	271	jbe L5
slouken@1346	272	L4:
slouken@1895	273	dec esi
slouken@1346	274	L5:
slouken@1895	275	xor edx,edx
slouken@1895	276	mov eax,esi
slouken@1346	277	L2:
slouken@1895	278	pop esi
slouken@1895	279	pop ebx
slouken@1895	280	ret 10h
slouken@1895	281	}
slouken@1895	282	/* INDENT-ON */
slouken@1330	283	}
slouken@2735	284
slouken@1895	285	void
slouken@1895	286	__declspec(naked)
slouken@1895	287	_allrem()
slouken@1330	288	{
slouken@1895	289	/* INDENT-OFF */
slouken@1895	290	__asm {
slouken@1895	291	push ebx
slouken@1895	292	push edi
slouken@1895	293	xor edi,edi
slouken@1895	294	mov eax,dword ptr [esp+10h]
slouken@1895	295	or eax,eax
slouken@1895	296	jge L1
slouken@1895	297	inc edi
slouken@1895	298	mov edx,dword ptr [esp+0Ch]
slouken@1895	299	neg eax
slouken@1895	300	neg edx
slouken@1895	301	sbb eax,0
slouken@1895	302	mov dword ptr [esp+10h],eax
slouken@1895	303	mov dword ptr [esp+0Ch],edx
slouken@1346	304	L1:
slouken@1895	305	mov eax,dword ptr [esp+18h]
slouken@1895	306	or eax,eax
slouken@1895	307	jge L2
slouken@1895	308	mov edx,dword ptr [esp+14h]
slouken@1895	309	neg eax
slouken@1895	310	neg edx
slouken@1895	311	sbb eax,0
slouken@1895	312	mov dword ptr [esp+18h],eax
slouken@1895	313	mov dword ptr [esp+14h],edx
slouken@1346	314	L2:
slouken@1895	315	or eax,eax
slouken@1895	316	jne L3
slouken@1895	317	mov ecx,dword ptr [esp+14h]
slouken@1895	318	mov eax,dword ptr [esp+10h]
slouken@1895	319	xor edx,edx
slouken@1895	320	div ecx
slouken@1895	321	mov eax,dword ptr [esp+0Ch]
slouken@1895	322	div ecx
slouken@1895	323	mov eax,edx
slouken@1895	324	xor edx,edx
slouken@1895	325	dec edi
slouken@1895	326	jns L4
slouken@1895	327	jmp L8
slouken@1346	328	L3:
slouken@1895	329	mov ebx,eax
slouken@1895	330	mov ecx,dword ptr [esp+14h]
slouken@1895	331	mov edx,dword ptr [esp+10h]
slouken@1895	332	mov eax,dword ptr [esp+0Ch]
slouken@1346	333	L5:
slouken@1895	334	shr ebx,1
slouken@1895	335	rcr ecx,1
slouken@1895	336	shr edx,1
slouken@1895	337	rcr eax,1
slouken@1895	338	or ebx,ebx
slouken@1895	339	jne L5
slouken@1895	340	div ecx
slouken@1895	341	mov ecx,eax
slouken@1895	342	mul dword ptr [esp+18h]
slouken@1895	343	xchg eax,ecx
slouken@1895	344	mul dword ptr [esp+14h]
slouken@1895	345	add edx,ecx
slouken@1895	346	jb L6
slouken@1895	347	cmp edx,dword ptr [esp+10h]
slouken@1895	348	ja L6
slouken@1895	349	jb L7
slouken@1895	350	cmp eax,dword ptr [esp+0Ch]
slouken@1895	351	jbe L7
slouken@1346	352	L6:
slouken@1895	353	sub eax,dword ptr [esp+14h]
slouken@1895	354	sbb edx,dword ptr [esp+18h]
slouken@1346	355	L7:
slouken@1895	356	sub eax,dword ptr [esp+0Ch]
slouken@1895	357	sbb edx,dword ptr [esp+10h]
slouken@1895	358	dec edi
slouken@1895	359	jns L8
slouken@1346	360	L4:
slouken@1895	361	neg edx
slouken@1895	362	neg eax
slouken@1895	363	sbb edx,0
slouken@1346	364	L8:
slouken@1895	365	pop edi
slouken@1895	366	pop ebx
slouken@1895	367	ret 10h
slouken@1895	368	}
slouken@1895	369	/* INDENT-ON */
slouken@1330	370	}
slouken@2735	371
slouken@1895	372	void
slouken@1895	373	__declspec(naked)
slouken@1895	374	_aullrem()
slouken@1330	375	{
slouken@1895	376	/* INDENT-OFF */
slouken@1895	377	__asm {
slouken@1895	378	push ebx
slouken@1895	379	mov eax,dword ptr [esp+14h]
slouken@1895	380	or eax,eax
slouken@1895	381	jne L1
slouken@1895	382	mov ecx,dword ptr [esp+10h]
slouken@1895	383	mov eax,dword ptr [esp+0Ch]
slouken@1895	384	xor edx,edx
slouken@1895	385	div ecx
slouken@1895	386	mov eax,dword ptr [esp+8]
slouken@1895	387	div ecx
slouken@1895	388	mov eax,edx
slouken@1895	389	xor edx,edx
slouken@1895	390	jmp L2
slouken@1346	391	L1:
slouken@1895	392	mov ecx,eax
slouken@1895	393	mov ebx,dword ptr [esp+10h]
slouken@1895	394	mov edx,dword ptr [esp+0Ch]
slouken@1895	395	mov eax,dword ptr [esp+8]
slouken@1346	396	L3:
slouken@1895	397	shr ecx,1
slouken@1895	398	rcr ebx,1
slouken@1895	399	shr edx,1
slouken@1895	400	rcr eax,1
slouken@1895	401	or ecx,ecx
slouken@1895	402	jne L3
slouken@1895	403	div ebx
slouken@1895	404	mov ecx,eax
slouken@1895	405	mul dword ptr [esp+14h]
slouken@1895	406	xchg eax,ecx
slouken@1895	407	mul dword ptr [esp+10h]
slouken@1895	408	add edx,ecx
slouken@1895	409	jb L4
slouken@1895	410	cmp edx,dword ptr [esp+0Ch]
slouken@1895	411	ja L4
slouken@1895	412	jb L5
slouken@1895	413	cmp eax,dword ptr [esp+8]
slouken@1895	414	jbe L5
slouken@1346	415	L4:
slouken@1895	416	sub eax,dword ptr [esp+10h]
slouken@1895	417	sbb edx,dword ptr [esp+14h]
slouken@1346	418	L5:
slouken@1895	419	sub eax,dword ptr [esp+8]
slouken@1895	420	sbb edx,dword ptr [esp+0Ch]
slouken@1895	421	neg edx
slouken@1895	422	neg eax
slouken@1895	423	sbb edx,0
slouken@1346	424	L2:
slouken@1895	425	pop ebx
slouken@1895	426	ret 10h
slouken@1895	427	}
slouken@1895	428	/* INDENT-ON */
slouken@1330	429	}
slouken@2735	430
slouken@1895	431	void
slouken@1895	432	__declspec(naked)
slouken@1895	433	_alldvrm()
slouken@1330	434	{
slouken@1895	435	/* INDENT-OFF */
slouken@1895	436	__asm {
slouken@1895	437	push edi
slouken@1895	438	push esi
slouken@1895	439	push ebp
slouken@1895	440	xor edi,edi
slouken@1895	441	xor ebp,ebp
slouken@1895	442	mov eax,dword ptr [esp+14h]
slouken@1895	443	or eax,eax
slouken@1895	444	jge L1
slouken@1895	445	inc edi
slouken@1895	446	inc ebp
slouken@1895	447	mov edx,dword ptr [esp+10h]
slouken@1895	448	neg eax
slouken@1895	449	neg edx
slouken@1895	450	sbb eax,0
slouken@1895	451	mov dword ptr [esp+14h],eax
slouken@1895	452	mov dword ptr [esp+10h],edx
slouken@1346	453	L1:
slouken@1895	454	mov eax,dword ptr [esp+1Ch]
slouken@1895	455	or eax,eax
slouken@1895	456	jge L2
slouken@1895	457	inc edi
slouken@1895	458	mov edx,dword ptr [esp+18h]
slouken@1895	459	neg eax
slouken@1895	460	neg edx
slouken@1895	461	sbb eax,0
slouken@1895	462	mov dword ptr [esp+1Ch],eax
slouken@1895	463	mov dword ptr [esp+18h],edx
slouken@1346	464	L2:
slouken@1895	465	or eax,eax
slouken@1895	466	jne L3
slouken@1895	467	mov ecx,dword ptr [esp+18h]
slouken@1895	468	mov eax,dword ptr [esp+14h]
slouken@1895	469	xor edx,edx
slouken@1895	470	div ecx
slouken@1895	471	mov ebx,eax
slouken@1895	472	mov eax,dword ptr [esp+10h]
slouken@1895	473	div ecx
slouken@1895	474	mov esi,eax
slouken@1895	475	mov eax,ebx
slouken@1895	476	mul dword ptr [esp+18h]
slouken@1895	477	mov ecx,eax
slouken@1895	478	mov eax,esi
slouken@1895	479	mul dword ptr [esp+18h]
slouken@1895	480	add edx,ecx
slouken@1895	481	jmp L4
slouken@1346	482	L3:
slouken@1895	483	mov ebx,eax
slouken@1895	484	mov ecx,dword ptr [esp+18h]
slouken@1895	485	mov edx,dword ptr [esp+14h]
slouken@1895	486	mov eax,dword ptr [esp+10h]
slouken@1346	487	L5:
slouken@1895	488	shr ebx,1
slouken@1895	489	rcr ecx,1
slouken@1895	490	shr edx,1
slouken@1895	491	rcr eax,1
slouken@1895	492	or ebx,ebx
slouken@1895	493	jne L5
slouken@1895	494	div ecx
slouken@1895	495	mov esi,eax
slouken@1895	496	mul dword ptr [esp+1Ch]
slouken@1895	497	mov ecx,eax
slouken@1895	498	mov eax,dword ptr [esp+18h]
slouken@1895	499	mul esi
slouken@1895	500	add edx,ecx
slouken@1895	501	jb L6
slouken@1895	502	cmp edx,dword ptr [esp+14h]
slouken@1895	503	ja L6
slouken@1895	504	jb L7
slouken@1895	505	cmp eax,dword ptr [esp+10h]
slouken@1895	506	jbe L7
slouken@1346	507	L6:
slouken@1895	508	dec esi
slouken@1895	509	sub eax,dword ptr [esp+18h]
slouken@1895	510	sbb edx,dword ptr [esp+1Ch]
slouken@1346	511	L7:
slouken@1895	512	xor ebx,ebx
slouken@1346	513	L4:
slouken@1895	514	sub eax,dword ptr [esp+10h]
slouken@1895	515	sbb edx,dword ptr [esp+14h]
slouken@1895	516	dec ebp
slouken@1895	517	jns L9
slouken@1895	518	neg edx
slouken@1895	519	neg eax
slouken@1895	520	sbb edx,0
slouken@1346	521	L9:
slouken@1895	522	mov ecx,edx
slouken@1895	523	mov edx,ebx
slouken@1895	524	mov ebx,ecx
slouken@1895	525	mov ecx,eax
slouken@1895	526	mov eax,esi
slouken@1895	527	dec edi
slouken@1895	528	jne L8
slouken@1895	529	neg edx
slouken@1895	530	neg eax
slouken@1895	531	sbb edx,0
slouken@1346	532	L8:
slouken@1895	533	pop ebp
slouken@1895	534	pop esi
slouken@1895	535	pop edi
slouken@1895	536	ret 10h
slouken@1895	537	}
slouken@1895	538	/* INDENT-ON */
slouken@1330	539	}
slouken@2735	540
slouken@1895	541	void
slouken@1895	542	__declspec(naked)
slouken@1895	543	_aulldvrm()
slouken@1330	544	{
slouken@1895	545	/* INDENT-OFF */
slouken@1895	546	__asm {
slouken@1895	547	push esi
slouken@1895	548	mov eax,dword ptr [esp+14h]
slouken@1895	549	or eax,eax
slouken@1895	550	jne L1
slouken@1895	551	mov ecx,dword ptr [esp+10h]
slouken@1895	552	mov eax,dword ptr [esp+0Ch]
slouken@1895	553	xor edx,edx
slouken@1895	554	div ecx
slouken@1895	555	mov ebx,eax
slouken@1895	556	mov eax,dword ptr [esp+8]
slouken@1895	557	div ecx
slouken@1895	558	mov esi,eax
slouken@1895	559	mov eax,ebx
slouken@1895	560	mul dword ptr [esp+10h]
slouken@1895	561	mov ecx,eax
slouken@1895	562	mov eax,esi
slouken@1895	563	mul dword ptr [esp+10h]
slouken@1895	564	add edx,ecx
slouken@1895	565	jmp L2
slouken@1346	566	L1:
slouken@1895	567	mov ecx,eax
slouken@1895	568	mov ebx,dword ptr [esp+10h]
slouken@1895	569	mov edx,dword ptr [esp+0Ch]
slouken@1895	570	mov eax,dword ptr [esp+8]
slouken@1346	571	L3:
slouken@1895	572	shr ecx,1
slouken@1895	573	rcr ebx,1
slouken@1895	574	shr edx,1
slouken@1895	575	rcr eax,1
slouken@1895	576	or ecx,ecx
slouken@1895	577	jne L3
slouken@1895	578	div ebx
slouken@1895	579	mov esi,eax
slouken@1895	580	mul dword ptr [esp+14h]
slouken@1895	581	mov ecx,eax
slouken@1895	582	mov eax,dword ptr [esp+10h]
slouken@1895	583	mul esi
slouken@1895	584	add edx,ecx
slouken@1895	585	jb L4
slouken@1895	586	cmp edx,dword ptr [esp+0Ch]
slouken@1895	587	ja L4
slouken@1895	588	jb L5
slouken@1895	589	cmp eax,dword ptr [esp+8]
slouken@1895	590	jbe L5
slouken@1346	591	L4:
slouken@1895	592	dec esi
slouken@1895	593	sub eax,dword ptr [esp+10h]
slouken@1895	594	sbb edx,dword ptr [esp+14h]
slouken@1346	595	L5:
slouken@1895	596	xor ebx,ebx
slouken@1346	597	L2:
slouken@1895	598	sub eax,dword ptr [esp+8]
slouken@1895	599	sbb edx,dword ptr [esp+0Ch]
slouken@1895	600	neg edx
slouken@1895	601	neg eax
slouken@1895	602	sbb edx,0
slouken@1895	603	mov ecx,edx
slouken@1895	604	mov edx,ebx
slouken@1895	605	mov ebx,ecx
slouken@1895	606	mov ecx,eax
slouken@1895	607	mov eax,esi
slouken@1895	608	pop esi
slouken@1895	609	ret 10h
slouken@1895	610	}
slouken@1895	611	/* INDENT-ON */
slouken@1330	612	}
slouken@2735	613
slouken@1895	614	void
slouken@1895	615	__declspec(naked)
slouken@1895	616	_allshl()
slouken@1330	617	{
slouken@1895	618	/* INDENT-OFF */
slouken@1895	619	__asm {
slouken@1895	620	cmp cl,40h
slouken@1895	621	jae RETZERO
slouken@1895	622	cmp cl,20h
slouken@1895	623	jae MORE32
slouken@1895	624	shld edx,eax,cl
slouken@1895	625	shl eax,cl
slouken@1895	626	ret
slouken@1346	627	MORE32:
slouken@1895	628	mov edx,eax
slouken@1895	629	xor eax,eax
slouken@1895	630	and cl,1Fh
slouken@1895	631	shl edx,cl
slouken@1895	632	ret
slouken@1346	633	RETZERO:
slouken@1895	634	xor eax,eax
slouken@1895	635	xor edx,edx
slouken@1895	636	ret
slouken@1895	637	}
slouken@1895	638	/* INDENT-ON */
slouken@1330	639	}
slouken@2735	640
slouken@1895	641	void
slouken@1895	642	__declspec(naked)
slouken@1895	643	_aullshr()
slouken@1330	644	{
slouken@1895	645	/* INDENT-OFF */
slouken@1895	646	__asm {
slouken@1895	647	cmp cl,40h
slouken@1895	648	jae RETZERO
slouken@1895	649	cmp cl,20h
slouken@1895	650	jae MORE32
slouken@1895	651	shrd eax,edx,cl
slouken@1895	652	shr edx,cl
slouken@1895	653	ret
slouken@1346	654	MORE32:
slouken@1895	655	mov eax,edx
slouken@1895	656	xor edx,edx
slouken@1895	657	and cl,1Fh
slouken@1895	658	shr eax,cl
slouken@1895	659	ret
slouken@1346	660	RETZERO:
slouken@1895	661	xor eax,eax
slouken@1895	662	xor edx,edx
slouken@1895	663	ret
slouken@1895	664	}
slouken@1895	665	/* INDENT-ON */
slouken@1330	666	}
slouken@1330	667
slouken@1330	668	#endif /* MSC_VER */
slouken@1330	669
slouken@1331	670	#endif /* !HAVE_LIBC */
slouken@1895	671
slouken@1895	672	/* vi: set ts=4 sw=4 expandtab: */

author	Sam Lantinga <slouken@libsdl.org>
	Wed, 27 Aug 2008 15:10:03 +0000
changeset 2735	204be4fc2726
parent 1895	c121d94672cb
child 2760	02aa80d7905f
permissions	-rw-r--r--