717 lines
18 KiB
C
717 lines
18 KiB
C
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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/* This file contains SDL replacements for functions in the C library */
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#if !defined(HAVE_LIBC) && !defined(SDL_STATIC_LIB)
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/* These are some C runtime intrinsics that need to be defined */
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#ifdef _MSC_VER
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#ifndef __FLTUSED__
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#define __FLTUSED__
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__declspec(selectany) int _fltused = 1;
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#endif
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/* The optimizer on Visual Studio 2005 and later generates memcpy() and memset() calls.
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Always provide it for the SDL3 DLL, but skip it when building static lib w/ static runtime. */
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#if (_MSC_VER >= 1400) && (!defined(_MT) || defined(DLL_EXPORT))
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/* NOLINTNEXTLINE(readability-redundant-declaration) */
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extern void *memcpy(void *dst, const void *src, size_t len);
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#ifndef __INTEL_LLVM_COMPILER
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#pragma intrinsic(memcpy)
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#endif
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#ifndef __clang__
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#pragma function(memcpy)
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#endif
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/* NOLINTNEXTLINE(readability-inconsistent-declaration-parameter-name) */
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void *memcpy(void *dst, const void *src, size_t len)
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{
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return SDL_memcpy(dst, src, len);
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}
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/* NOLINTNEXTLINE(readability-redundant-declaration) */
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extern void *memset(void *dst, int c, size_t len);
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#ifndef __INTEL_LLVM_COMPILER
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#pragma intrinsic(memset)
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#endif
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#ifndef __clang__
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#pragma function(memset)
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#endif
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/* NOLINTNEXTLINE(readability-inconsistent-declaration-parameter-name) */
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void *memset(void *dst, int c, size_t len)
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{
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return SDL_memset(dst, c, len);
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}
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#endif /* (_MSC_VER >= 1400) && (!defined(_MT) || defined(DLL_EXPORT)) */
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#ifdef _M_IX86
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/* Float to long */
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void __declspec(naked) _ftol()
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{
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/* *INDENT-OFF* */
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__asm {
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push ebp
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mov ebp,esp
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sub esp,20h
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and esp,0FFFFFFF0h
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fld st(0)
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fst dword ptr [esp+18h]
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fistp qword ptr [esp+10h]
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fild qword ptr [esp+10h]
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mov edx,dword ptr [esp+18h]
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mov eax,dword ptr [esp+10h]
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test eax,eax
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je integer_QnaN_or_zero
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arg_is_not_integer_QnaN:
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fsubp st(1),st
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test edx,edx
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jns positive
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fstp dword ptr [esp]
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mov ecx,dword ptr [esp]
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xor ecx,80000000h
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add ecx,7FFFFFFFh
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adc eax,0
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mov edx,dword ptr [esp+14h]
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adc edx,0
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jmp localexit
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positive:
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fstp dword ptr [esp]
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mov ecx,dword ptr [esp]
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add ecx,7FFFFFFFh
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sbb eax,0
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mov edx,dword ptr [esp+14h]
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sbb edx,0
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jmp localexit
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integer_QnaN_or_zero:
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mov edx,dword ptr [esp+14h]
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test edx,7FFFFFFFh
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jne arg_is_not_integer_QnaN
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fstp dword ptr [esp+18h]
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fstp dword ptr [esp+18h]
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localexit:
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leave
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ret
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}
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/* *INDENT-ON* */
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}
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void _ftol2_sse()
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{
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_ftol();
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}
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void _ftol2()
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{
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_ftol();
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}
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/* 64-bit math operators for 32-bit systems */
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void __declspec(naked) _allmul()
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{
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/* *INDENT-OFF* */
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__asm {
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mov eax, dword ptr[esp+8]
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mov ecx, dword ptr[esp+10h]
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or ecx, eax
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mov ecx, dword ptr[esp+0Ch]
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jne hard
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mov eax, dword ptr[esp+4]
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mul ecx
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ret 10h
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hard:
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push ebx
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mul ecx
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mov ebx, eax
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mov eax, dword ptr[esp+8]
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mul dword ptr[esp+14h]
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add ebx, eax
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mov eax, dword ptr[esp+8]
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mul ecx
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add edx, ebx
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pop ebx
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ret 10h
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}
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/* *INDENT-ON* */
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}
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void __declspec(naked) _alldiv()
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{
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/* *INDENT-OFF* */
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__asm {
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push edi
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push esi
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push ebx
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xor edi,edi
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mov eax,dword ptr [esp+14h]
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or eax,eax
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jge L1
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inc edi
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mov edx,dword ptr [esp+10h]
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neg eax
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neg edx
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sbb eax,0
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mov dword ptr [esp+14h],eax
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mov dword ptr [esp+10h],edx
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L1:
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mov eax,dword ptr [esp+1Ch]
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or eax,eax
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jge L2
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inc edi
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mov edx,dword ptr [esp+18h]
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neg eax
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neg edx
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sbb eax,0
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mov dword ptr [esp+1Ch],eax
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mov dword ptr [esp+18h],edx
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L2:
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or eax,eax
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jne L3
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mov ecx,dword ptr [esp+18h]
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mov eax,dword ptr [esp+14h]
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xor edx,edx
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div ecx
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mov ebx,eax
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mov eax,dword ptr [esp+10h]
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div ecx
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mov edx,ebx
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jmp L4
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L3:
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mov ebx,eax
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mov ecx,dword ptr [esp+18h]
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mov edx,dword ptr [esp+14h]
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mov eax,dword ptr [esp+10h]
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L5:
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shr ebx,1
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rcr ecx,1
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shr edx,1
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rcr eax,1
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or ebx,ebx
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jne L5
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div ecx
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mov esi,eax
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mul dword ptr [esp+1Ch]
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mov ecx,eax
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mov eax,dword ptr [esp+18h]
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mul esi
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add edx,ecx
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jb L6
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cmp edx,dword ptr [esp+14h]
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ja L6
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jb L7
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cmp eax,dword ptr [esp+10h]
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jbe L7
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L6:
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dec esi
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L7:
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xor edx,edx
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mov eax,esi
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L4:
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dec edi
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jne L8
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neg edx
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neg eax
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sbb edx,0
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L8:
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pop ebx
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pop esi
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pop edi
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ret 10h
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}
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/* *INDENT-ON* */
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}
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void __declspec(naked) _aulldiv()
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{
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/* *INDENT-OFF* */
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__asm {
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push ebx
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push esi
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mov eax,dword ptr [esp+18h]
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or eax,eax
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jne L1
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mov ecx,dword ptr [esp+14h]
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mov eax,dword ptr [esp+10h]
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xor edx,edx
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div ecx
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mov ebx,eax
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mov eax,dword ptr [esp+0Ch]
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div ecx
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mov edx,ebx
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jmp L2
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L1:
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mov ecx,eax
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mov ebx,dword ptr [esp+14h]
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mov edx,dword ptr [esp+10h]
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mov eax,dword ptr [esp+0Ch]
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L3:
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shr ecx,1
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rcr ebx,1
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shr edx,1
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rcr eax,1
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or ecx,ecx
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jne L3
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div ebx
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mov esi,eax
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mul dword ptr [esp+18h]
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mov ecx,eax
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mov eax,dword ptr [esp+14h]
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mul esi
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add edx,ecx
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jb L4
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cmp edx,dword ptr [esp+10h]
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ja L4
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jb L5
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cmp eax,dword ptr [esp+0Ch]
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jbe L5
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L4:
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dec esi
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L5:
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xor edx,edx
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mov eax,esi
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L2:
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pop esi
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pop ebx
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ret 10h
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}
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/* *INDENT-ON* */
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}
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void __declspec(naked) _allrem()
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{
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/* *INDENT-OFF* */
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__asm {
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push ebx
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push edi
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xor edi,edi
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mov eax,dword ptr [esp+10h]
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or eax,eax
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jge L1
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inc edi
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mov edx,dword ptr [esp+0Ch]
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neg eax
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neg edx
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sbb eax,0
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mov dword ptr [esp+10h],eax
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mov dword ptr [esp+0Ch],edx
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L1:
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mov eax,dword ptr [esp+18h]
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or eax,eax
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jge L2
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mov edx,dword ptr [esp+14h]
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neg eax
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neg edx
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sbb eax,0
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mov dword ptr [esp+18h],eax
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mov dword ptr [esp+14h],edx
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L2:
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or eax,eax
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jne L3
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mov ecx,dword ptr [esp+14h]
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mov eax,dword ptr [esp+10h]
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xor edx,edx
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div ecx
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mov eax,dword ptr [esp+0Ch]
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div ecx
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mov eax,edx
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xor edx,edx
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dec edi
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jns L4
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jmp L8
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L3:
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mov ebx,eax
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mov ecx,dword ptr [esp+14h]
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mov edx,dword ptr [esp+10h]
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mov eax,dword ptr [esp+0Ch]
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L5:
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shr ebx,1
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rcr ecx,1
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shr edx,1
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rcr eax,1
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or ebx,ebx
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jne L5
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div ecx
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mov ecx,eax
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mul dword ptr [esp+18h]
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xchg eax,ecx
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mul dword ptr [esp+14h]
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add edx,ecx
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jb L6
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cmp edx,dword ptr [esp+10h]
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ja L6
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jb L7
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cmp eax,dword ptr [esp+0Ch]
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jbe L7
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L6:
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sub eax,dword ptr [esp+14h]
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sbb edx,dword ptr [esp+18h]
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L7:
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sub eax,dword ptr [esp+0Ch]
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sbb edx,dword ptr [esp+10h]
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dec edi
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jns L8
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L4:
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neg edx
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neg eax
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sbb edx,0
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L8:
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pop edi
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pop ebx
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ret 10h
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}
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/* *INDENT-ON* */
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}
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void __declspec(naked) _aullrem()
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{
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/* *INDENT-OFF* */
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__asm {
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push ebx
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mov eax,dword ptr [esp+14h]
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or eax,eax
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jne L1
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mov ecx,dword ptr [esp+10h]
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mov eax,dword ptr [esp+0Ch]
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xor edx,edx
|
||
|
|
div ecx
|
||
|
|
mov eax,dword ptr [esp+8]
|
||
|
|
div ecx
|
||
|
|
mov eax,edx
|
||
|
|
xor edx,edx
|
||
|
|
jmp L2
|
||
|
|
L1:
|
||
|
|
mov ecx,eax
|
||
|
|
mov ebx,dword ptr [esp+10h]
|
||
|
|
mov edx,dword ptr [esp+0Ch]
|
||
|
|
mov eax,dword ptr [esp+8]
|
||
|
|
L3:
|
||
|
|
shr ecx,1
|
||
|
|
rcr ebx,1
|
||
|
|
shr edx,1
|
||
|
|
rcr eax,1
|
||
|
|
or ecx,ecx
|
||
|
|
jne L3
|
||
|
|
div ebx
|
||
|
|
mov ecx,eax
|
||
|
|
mul dword ptr [esp+14h]
|
||
|
|
xchg eax,ecx
|
||
|
|
mul dword ptr [esp+10h]
|
||
|
|
add edx,ecx
|
||
|
|
jb L4
|
||
|
|
cmp edx,dword ptr [esp+0Ch]
|
||
|
|
ja L4
|
||
|
|
jb L5
|
||
|
|
cmp eax,dword ptr [esp+8]
|
||
|
|
jbe L5
|
||
|
|
L4:
|
||
|
|
sub eax,dword ptr [esp+10h]
|
||
|
|
sbb edx,dword ptr [esp+14h]
|
||
|
|
L5:
|
||
|
|
sub eax,dword ptr [esp+8]
|
||
|
|
sbb edx,dword ptr [esp+0Ch]
|
||
|
|
neg edx
|
||
|
|
neg eax
|
||
|
|
sbb edx,0
|
||
|
|
L2:
|
||
|
|
pop ebx
|
||
|
|
ret 10h
|
||
|
|
}
|
||
|
|
/* *INDENT-ON* */
|
||
|
|
}
|
||
|
|
|
||
|
|
void __declspec(naked) _alldvrm()
|
||
|
|
{
|
||
|
|
/* *INDENT-OFF* */
|
||
|
|
__asm {
|
||
|
|
push edi
|
||
|
|
push esi
|
||
|
|
push ebp
|
||
|
|
xor edi,edi
|
||
|
|
xor ebp,ebp
|
||
|
|
mov eax,dword ptr [esp+14h]
|
||
|
|
or eax,eax
|
||
|
|
jge L1
|
||
|
|
inc edi
|
||
|
|
inc ebp
|
||
|
|
mov edx,dword ptr [esp+10h]
|
||
|
|
neg eax
|
||
|
|
neg edx
|
||
|
|
sbb eax,0
|
||
|
|
mov dword ptr [esp+14h],eax
|
||
|
|
mov dword ptr [esp+10h],edx
|
||
|
|
L1:
|
||
|
|
mov eax,dword ptr [esp+1Ch]
|
||
|
|
or eax,eax
|
||
|
|
jge L2
|
||
|
|
inc edi
|
||
|
|
mov edx,dword ptr [esp+18h]
|
||
|
|
neg eax
|
||
|
|
neg edx
|
||
|
|
sbb eax,0
|
||
|
|
mov dword ptr [esp+1Ch],eax
|
||
|
|
mov dword ptr [esp+18h],edx
|
||
|
|
L2:
|
||
|
|
or eax,eax
|
||
|
|
jne L3
|
||
|
|
mov ecx,dword ptr [esp+18h]
|
||
|
|
mov eax,dword ptr [esp+14h]
|
||
|
|
xor edx,edx
|
||
|
|
div ecx
|
||
|
|
mov ebx,eax
|
||
|
|
mov eax,dword ptr [esp+10h]
|
||
|
|
div ecx
|
||
|
|
mov esi,eax
|
||
|
|
mov eax,ebx
|
||
|
|
mul dword ptr [esp+18h]
|
||
|
|
mov ecx,eax
|
||
|
|
mov eax,esi
|
||
|
|
mul dword ptr [esp+18h]
|
||
|
|
add edx,ecx
|
||
|
|
jmp L4
|
||
|
|
L3:
|
||
|
|
mov ebx,eax
|
||
|
|
mov ecx,dword ptr [esp+18h]
|
||
|
|
mov edx,dword ptr [esp+14h]
|
||
|
|
mov eax,dword ptr [esp+10h]
|
||
|
|
L5:
|
||
|
|
shr ebx,1
|
||
|
|
rcr ecx,1
|
||
|
|
shr edx,1
|
||
|
|
rcr eax,1
|
||
|
|
or ebx,ebx
|
||
|
|
jne L5
|
||
|
|
div ecx
|
||
|
|
mov esi,eax
|
||
|
|
mul dword ptr [esp+1Ch]
|
||
|
|
mov ecx,eax
|
||
|
|
mov eax,dword ptr [esp+18h]
|
||
|
|
mul esi
|
||
|
|
add edx,ecx
|
||
|
|
jb L6
|
||
|
|
cmp edx,dword ptr [esp+14h]
|
||
|
|
ja L6
|
||
|
|
jb L7
|
||
|
|
cmp eax,dword ptr [esp+10h]
|
||
|
|
jbe L7
|
||
|
|
L6:
|
||
|
|
dec esi
|
||
|
|
sub eax,dword ptr [esp+18h]
|
||
|
|
sbb edx,dword ptr [esp+1Ch]
|
||
|
|
L7:
|
||
|
|
xor ebx,ebx
|
||
|
|
L4:
|
||
|
|
sub eax,dword ptr [esp+10h]
|
||
|
|
sbb edx,dword ptr [esp+14h]
|
||
|
|
dec ebp
|
||
|
|
jns L9
|
||
|
|
neg edx
|
||
|
|
neg eax
|
||
|
|
sbb edx,0
|
||
|
|
L9:
|
||
|
|
mov ecx,edx
|
||
|
|
mov edx,ebx
|
||
|
|
mov ebx,ecx
|
||
|
|
mov ecx,eax
|
||
|
|
mov eax,esi
|
||
|
|
dec edi
|
||
|
|
jne L8
|
||
|
|
neg edx
|
||
|
|
neg eax
|
||
|
|
sbb edx,0
|
||
|
|
L8:
|
||
|
|
pop ebp
|
||
|
|
pop esi
|
||
|
|
pop edi
|
||
|
|
ret 10h
|
||
|
|
}
|
||
|
|
/* *INDENT-ON* */
|
||
|
|
}
|
||
|
|
|
||
|
|
void __declspec(naked) _aulldvrm()
|
||
|
|
{
|
||
|
|
/* *INDENT-OFF* */
|
||
|
|
__asm {
|
||
|
|
push esi
|
||
|
|
mov eax,dword ptr [esp+14h]
|
||
|
|
or eax,eax
|
||
|
|
jne L1
|
||
|
|
mov ecx,dword ptr [esp+10h]
|
||
|
|
mov eax,dword ptr [esp+0Ch]
|
||
|
|
xor edx,edx
|
||
|
|
div ecx
|
||
|
|
mov ebx,eax
|
||
|
|
mov eax,dword ptr [esp+8]
|
||
|
|
div ecx
|
||
|
|
mov esi,eax
|
||
|
|
mov eax,ebx
|
||
|
|
mul dword ptr [esp+10h]
|
||
|
|
mov ecx,eax
|
||
|
|
mov eax,esi
|
||
|
|
mul dword ptr [esp+10h]
|
||
|
|
add edx,ecx
|
||
|
|
jmp L2
|
||
|
|
L1:
|
||
|
|
mov ecx,eax
|
||
|
|
mov ebx,dword ptr [esp+10h]
|
||
|
|
mov edx,dword ptr [esp+0Ch]
|
||
|
|
mov eax,dword ptr [esp+8]
|
||
|
|
L3:
|
||
|
|
shr ecx,1
|
||
|
|
rcr ebx,1
|
||
|
|
shr edx,1
|
||
|
|
rcr eax,1
|
||
|
|
or ecx,ecx
|
||
|
|
jne L3
|
||
|
|
div ebx
|
||
|
|
mov esi,eax
|
||
|
|
mul dword ptr [esp+14h]
|
||
|
|
mov ecx,eax
|
||
|
|
mov eax,dword ptr [esp+10h]
|
||
|
|
mul esi
|
||
|
|
add edx,ecx
|
||
|
|
jb L4
|
||
|
|
cmp edx,dword ptr [esp+0Ch]
|
||
|
|
ja L4
|
||
|
|
jb L5
|
||
|
|
cmp eax,dword ptr [esp+8]
|
||
|
|
jbe L5
|
||
|
|
L4:
|
||
|
|
dec esi
|
||
|
|
sub eax,dword ptr [esp+10h]
|
||
|
|
sbb edx,dword ptr [esp+14h]
|
||
|
|
L5:
|
||
|
|
xor ebx,ebx
|
||
|
|
L2:
|
||
|
|
sub eax,dword ptr [esp+8]
|
||
|
|
sbb edx,dword ptr [esp+0Ch]
|
||
|
|
neg edx
|
||
|
|
neg eax
|
||
|
|
sbb edx,0
|
||
|
|
mov ecx,edx
|
||
|
|
mov edx,ebx
|
||
|
|
mov ebx,ecx
|
||
|
|
mov ecx,eax
|
||
|
|
mov eax,esi
|
||
|
|
pop esi
|
||
|
|
ret 10h
|
||
|
|
}
|
||
|
|
/* *INDENT-ON* */
|
||
|
|
}
|
||
|
|
|
||
|
|
void __declspec(naked) _allshl()
|
||
|
|
{
|
||
|
|
/* *INDENT-OFF* */
|
||
|
|
__asm {
|
||
|
|
cmp cl,40h
|
||
|
|
jae RETZERO
|
||
|
|
cmp cl,20h
|
||
|
|
jae MORE32
|
||
|
|
shld edx,eax,cl
|
||
|
|
shl eax,cl
|
||
|
|
ret
|
||
|
|
MORE32:
|
||
|
|
mov edx,eax
|
||
|
|
xor eax,eax
|
||
|
|
and cl,1Fh
|
||
|
|
shl edx,cl
|
||
|
|
ret
|
||
|
|
RETZERO:
|
||
|
|
xor eax,eax
|
||
|
|
xor edx,edx
|
||
|
|
ret
|
||
|
|
}
|
||
|
|
/* *INDENT-ON* */
|
||
|
|
}
|
||
|
|
|
||
|
|
void __declspec(naked) _allshr()
|
||
|
|
{
|
||
|
|
/* *INDENT-OFF* */
|
||
|
|
__asm {
|
||
|
|
cmp cl,3Fh
|
||
|
|
jae RETSIGN
|
||
|
|
cmp cl,20h
|
||
|
|
jae MORE32
|
||
|
|
shrd eax,edx,cl
|
||
|
|
sar edx,cl
|
||
|
|
ret
|
||
|
|
MORE32:
|
||
|
|
mov eax,edx
|
||
|
|
sar edx,1Fh
|
||
|
|
and cl,1Fh
|
||
|
|
sar eax,cl
|
||
|
|
ret
|
||
|
|
RETSIGN:
|
||
|
|
sar edx,1Fh
|
||
|
|
mov eax,edx
|
||
|
|
ret
|
||
|
|
}
|
||
|
|
/* *INDENT-ON* */
|
||
|
|
}
|
||
|
|
|
||
|
|
void __declspec(naked) _aullshr()
|
||
|
|
{
|
||
|
|
/* *INDENT-OFF* */
|
||
|
|
__asm {
|
||
|
|
cmp cl,40h
|
||
|
|
jae RETZERO
|
||
|
|
cmp cl,20h
|
||
|
|
jae MORE32
|
||
|
|
shrd eax,edx,cl
|
||
|
|
shr edx,cl
|
||
|
|
ret
|
||
|
|
MORE32:
|
||
|
|
mov eax,edx
|
||
|
|
xor edx,edx
|
||
|
|
and cl,1Fh
|
||
|
|
shr eax,cl
|
||
|
|
ret
|
||
|
|
RETZERO:
|
||
|
|
xor eax,eax
|
||
|
|
xor edx,edx
|
||
|
|
ret
|
||
|
|
}
|
||
|
|
/* *INDENT-ON* */
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _M_IX86 */
|
||
|
|
|
||
|
|
#endif /* MSC_VER */
|
||
|
|
|
||
|
|
#ifdef __ICL
|
||
|
|
/* The classic Intel compiler generates calls to _intel_fast_memcpy
|
||
|
|
* and _intel_fast_memset when building an optimized SDL library */
|
||
|
|
void *_intel_fast_memcpy(void *dst, const void *src, size_t len)
|
||
|
|
{
|
||
|
|
return SDL_memcpy(dst, src, len);
|
||
|
|
}
|
||
|
|
void *_intel_fast_memset(void *dst, int c, size_t len)
|
||
|
|
{
|
||
|
|
return SDL_memset(dst, c, len);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* !HAVE_LIBC && !SDL_STATIC_LIB */
|