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68 lines
1.1 KiB
C
68 lines
1.1 KiB
C
/*
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* $Logfile: /descent3/main/lib/win/fixwin32.h $
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* $Revision: 3 $
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* $Date: 2/27/97 4:57p $
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* $Author: Samir $
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*
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* $Log: /descent3/main/lib/win/fixwin32.h $
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*
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* 3 2/27/97 4:57p Samir
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* disabled annoying no return value message for this header.
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*
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* 2 2/27/97 4:49 PM Jeremy
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* fixed a typo
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*
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* 1 2/27/97 4:45 PM Jeremy
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* inline assembly language functions for Intel processor for
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* fixmul/fixdiv/fixmuldiv
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*
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* $NoKeywords: $
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*/
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#ifndef _FIXWIN32_H
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#define _FIXWIN32_H
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// what does this do? Why didn't Jason put a comment here?
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// Jason replies: This pragma disables the "no return value" warning that
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// is generated when converting doubles to floats
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// A thousand pardons for the confusion
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#pragma warning(disable : 4035)
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inline fix FixDiv(fix a, fix b) {
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__asm
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{
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mov eax,a
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mov ebx,b
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cdq
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shld edx, eax, 16
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sal eax,16
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idiv ebx
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}
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}
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inline fix FixMul(fix a, fix b) {
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__asm
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{
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mov eax,a
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mov ebx,b
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imul ebx
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shrd eax,edx,16
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}
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}
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inline fix FixMulDiv(fix a, fix b, fix c) {
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__asm
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{
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mov eax, a
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mov edx, b
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mov ebx, c
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imul edx
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idiv ebx
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}
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}
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#pragma warning(default : 4035)
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#endif
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