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Add inline assembly version of FT_MulFix for MSVC. 

* include/freetype/config/ftconfig.h: Ported the FT_MulFix_i386
function from GNU inline assembly syntax (see #ifdef __GNUC__ block
above) to MASM syntax for Microsoft Visual C++.
This commit is contained in:
Bradley Grainger 2011-02-12 12:51:36 -08:00 committed by Werner Lemberg
parent d2731e104c
commit 70f7db113e
2 changed files with 45 additions and 0 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2011-02-13 Bradley Grainger <bgrainger@logos.com>
Add inline assembly version of FT_MulFix for MSVC.
* include/freetype/config/ftconfig.h: Ported the FT_MulFix_i386
function from GNU inline assembly syntax (see #ifdef __GNUC__ block
above) to MASM syntax for Microsoft Visual C++.
2011-02-13 Bradley Grainger <bgrainger@logos.com> 2011-02-13 Bradley Grainger <bgrainger@logos.com>
Add project and solution files in Visual Studio 2010 format. Add project and solution files in Visual Studio 2010 format.

37
include/freetype/config/ftconfig.h
View File

@ -395,6 +395,43 @@ FT_BEGIN_HEADER
#endif /* __GNUC__ */ #endif /* __GNUC__ */
#ifdef _MSC_VER /* Visual C++ */
#ifdef _M_IX86
#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
/* documentation is in freetype.h */
static __inline FT_Int32
FT_MulFix_i386( FT_Int32 a,
FT_Int32 b )
{
register FT_Int32 result;
__asm
{
mov eax, a
mov edx, b
imul edx
mov ecx, edx
sar ecx, 31
add ecx, 8000h
add eax, ecx
adc edx, 0
shr eax, 16
shl edx, 16
add eax, edx
mov result, eax
}
return result;
}
#endif /* _M_IX86 */
#endif /* _MSC_VER */
#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */ #endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */