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Fixed bug 2537 - _allmul in SDL_lib.c is not working properly

This commit is contained in:
Sam Lantinga 2014-07-27 17:44:10 -07:00
parent 5c6c86912d
commit a0b68e817d
1 changed files with 29 additions and 38 deletions
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67
src/stdlib/SDL_stdlib.c
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@ -370,44 +370,35 @@ _ftol2_sse()
_ftol();
}
/* 64-bit math operators for 32-bit systems */
void
__declspec(naked)
_allmul()
{
/* *INDENT-OFF* */
__asm {
push ebp
mov ebp,esp
push edi
push esi
push ebx
sub esp,0Ch
mov eax,dword ptr [ebp+10h]
mov edi,dword ptr [ebp+8]
mov ebx,eax
mov esi,eax
sar esi,1Fh
mov eax,dword ptr [ebp+8]
mul ebx
imul edi,esi
mov ecx,edx
mov dword ptr [ebp-18h],eax
mov edx,dword ptr [ebp+0Ch]
add ecx,edi
imul ebx,edx
mov eax,dword ptr [ebp-18h]
lea ebx,[ebx+ecx]
mov dword ptr [ebp-14h],ebx
mov edx,dword ptr [ebp-14h]
add esp,0Ch
pop ebx
pop esi
pop edi
pop ebp
ret 10h
}
/* *INDENT-ON* */
/* 64-bit math operators for 32-bit systems */
void
__declspec(naked)
_allmul()
{
/* *INDENT-OFF* */
__asm {
mov eax, dword ptr[esp+8]
mov ecx, dword ptr[esp+10h]
or ecx, eax
mov ecx, dword ptr[esp+0Ch]
jne hard
mov eax, dword ptr[esp+4]
mul ecx
ret 10h
hard:
push ebx
mul ecx
mov ebx, eax
mov eax, dword ptr[esp+8]
mul dword ptr[esp+14h]
add ebx, eax
mov eax, dword ptr[esp+8]
mul ecx
add edx, ebx
pop ebx
ret 10h
}
/* *INDENT-ON* */
}
void