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https://github.com/ZDoom/qzdoom-gpl.git
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344dda4a1a
former used fistp, which is not portable across platforms, so cannot be used in the play simulation. They were only suitable for the renderer. xs_Float.h also has a very fast float->fixed conversion, so FLOAT2FIXED uses that now. (And I also learned that the FPU's round to nearest is not the rounding I learned in grade school but actually Banker's Rounding. I had no idea.) (Also, also, the only thing that could have made quickertoint faster than toint was that it stored a 32-bit int. I never timed them, and I doubt in practice there was any real difference between the two.) - Changed atan2f to atan2. Using floats is not a win, because the result is returned as a double on the x87 stack, which the caller then needs to cast down to a float using fst/fld. SVN r1990 (trunk)
351 lines
7.6 KiB
C
351 lines
7.6 KiB
C
// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
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// Ken Silverman's official web site: "http://www.advsys.net/ken"
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// See the included license file "BUILDLIC.TXT" for license info.
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//
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// This file is based on pragmas.h from Ken Silverman's original Build
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// source code release but is meant for use with Visual C++ instead of
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// Watcom C.
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//
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// Some of the inline assembly has been turned into C code, because VC++
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// is smart enough to produce code at least as good as Ken's inlines.
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// The more used functions are still inline assembly, because they do
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// things that can't really be done in C. (I consider this a bad thing,
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// because VC++ has considerably poorer support for inline assembly than
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// Watcom, so it's better to rely on its C optimizer to produce fast code.)
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//
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#include <string.h>
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#include <stddef.h>
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#pragma warning (disable: 4035)
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__forceinline SDWORD Scale (SDWORD a, SDWORD b, SDWORD c)
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{
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__asm mov eax,a
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__asm imul b
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__asm idiv c
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}
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__forceinline SDWORD MulScale (SDWORD a, SDWORD b, SDWORD c)
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{
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__asm mov eax,a
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__asm mov ecx,c
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__asm imul b
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__asm shrd eax,edx,cl
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}
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#define MAKECONSTMulScale(s) \
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__forceinline SDWORD MulScale##s (SDWORD a, SDWORD b) \
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{ \
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__asm mov eax,a \
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__asm imul b \
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__asm shrd eax,edx,s \
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}
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MAKECONSTMulScale(1)
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MAKECONSTMulScale(2)
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MAKECONSTMulScale(3)
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MAKECONSTMulScale(4)
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MAKECONSTMulScale(5)
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MAKECONSTMulScale(6)
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MAKECONSTMulScale(7)
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MAKECONSTMulScale(8)
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MAKECONSTMulScale(9)
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MAKECONSTMulScale(10)
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MAKECONSTMulScale(11)
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MAKECONSTMulScale(12)
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MAKECONSTMulScale(13)
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MAKECONSTMulScale(14)
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MAKECONSTMulScale(15)
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MAKECONSTMulScale(16)
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MAKECONSTMulScale(17)
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MAKECONSTMulScale(18)
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MAKECONSTMulScale(19)
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MAKECONSTMulScale(20)
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MAKECONSTMulScale(21)
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MAKECONSTMulScale(22)
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MAKECONSTMulScale(23)
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MAKECONSTMulScale(24)
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MAKECONSTMulScale(25)
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MAKECONSTMulScale(26)
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MAKECONSTMulScale(27)
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MAKECONSTMulScale(28)
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MAKECONSTMulScale(29)
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MAKECONSTMulScale(30)
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MAKECONSTMulScale(31)
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#undef MAKECONSTMulScale
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__forceinline SDWORD MulScale32 (SDWORD a, SDWORD b)
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{
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__asm mov eax,a
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__asm imul b
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__asm mov eax,edx
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}
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__forceinline DWORD UMulScale16(DWORD a, DWORD b)
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{
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__asm mov eax,a
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__asm mul b
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__asm shrd eax,edx,16
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}
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__forceinline SDWORD DMulScale (SDWORD a, SDWORD b, SDWORD c, SDWORD d, SDWORD s)
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{
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__asm mov eax,a
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__asm imul b
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__asm mov ebx,eax
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__asm mov eax,c
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__asm mov esi,edx
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__asm mov ecx,s
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__asm imul d
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__asm add eax,ebx
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__asm adc edx,esi
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__asm shrd eax,edx,cl
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}
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#define MAKECONSTDMulScale(s) \
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__forceinline SDWORD DMulScale##s (SDWORD a, SDWORD b, SDWORD c, SDWORD d) \
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{ \
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__asm mov eax,a \
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__asm imul b \
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__asm mov ebx,eax \
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__asm mov eax,c \
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__asm mov esi,edx \
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__asm imul d \
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__asm add eax,ebx \
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__asm adc edx,esi \
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__asm shrd eax,edx,s \
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}
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MAKECONSTDMulScale(1)
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MAKECONSTDMulScale(2)
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MAKECONSTDMulScale(3)
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MAKECONSTDMulScale(4)
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MAKECONSTDMulScale(5)
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MAKECONSTDMulScale(6)
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MAKECONSTDMulScale(7)
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MAKECONSTDMulScale(8)
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MAKECONSTDMulScale(9)
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MAKECONSTDMulScale(10)
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MAKECONSTDMulScale(11)
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MAKECONSTDMulScale(12)
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MAKECONSTDMulScale(13)
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MAKECONSTDMulScale(14)
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MAKECONSTDMulScale(15)
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MAKECONSTDMulScale(16)
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MAKECONSTDMulScale(17)
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MAKECONSTDMulScale(18)
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MAKECONSTDMulScale(19)
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MAKECONSTDMulScale(20)
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MAKECONSTDMulScale(21)
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MAKECONSTDMulScale(22)
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MAKECONSTDMulScale(23)
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MAKECONSTDMulScale(24)
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MAKECONSTDMulScale(25)
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MAKECONSTDMulScale(26)
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MAKECONSTDMulScale(27)
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MAKECONSTDMulScale(28)
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MAKECONSTDMulScale(29)
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MAKECONSTDMulScale(30)
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MAKECONSTDMulScale(31)
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#undef MAKCONSTDMulScale
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__forceinline SDWORD DMulScale32 (SDWORD a, SDWORD b, SDWORD c, SDWORD d)
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{
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__asm mov eax,a
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__asm imul b
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__asm mov ebx,eax
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__asm mov eax,c
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__asm mov esi,edx
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__asm imul d
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__asm add eax,ebx
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__asm adc edx,esi
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__asm mov eax,edx
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}
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#define MAKECONSTTMulScale(s) \
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__forceinline SDWORD TMulScale##s (SDWORD a, SDWORD b, SDWORD c, SDWORD d, SDWORD e, SDWORD f) \
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{ \
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__asm mov eax,a \
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__asm imul b \
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__asm mov ebx,eax \
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__asm mov eax,d \
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__asm mov ecx,edx \
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__asm imul c \
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__asm add ebx,eax \
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__asm mov eax,e \
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__asm adc ecx,edx \
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__asm imul f \
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__asm add eax,ebx \
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__asm adc edx,ecx \
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__asm shrd eax,edx,s \
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}
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MAKECONSTTMulScale(1)
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MAKECONSTTMulScale(2)
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MAKECONSTTMulScale(3)
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MAKECONSTTMulScale(4)
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MAKECONSTTMulScale(5)
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MAKECONSTTMulScale(6)
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MAKECONSTTMulScale(7)
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MAKECONSTTMulScale(8)
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MAKECONSTTMulScale(9)
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MAKECONSTTMulScale(10)
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MAKECONSTTMulScale(11)
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MAKECONSTTMulScale(12)
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MAKECONSTTMulScale(13)
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MAKECONSTTMulScale(14)
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MAKECONSTTMulScale(15)
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MAKECONSTTMulScale(16)
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MAKECONSTTMulScale(17)
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MAKECONSTTMulScale(18)
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MAKECONSTTMulScale(19)
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MAKECONSTTMulScale(20)
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MAKECONSTTMulScale(21)
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MAKECONSTTMulScale(22)
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MAKECONSTTMulScale(23)
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MAKECONSTTMulScale(24)
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MAKECONSTTMulScale(25)
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MAKECONSTTMulScale(26)
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MAKECONSTTMulScale(27)
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MAKECONSTTMulScale(28)
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MAKECONSTTMulScale(29)
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MAKECONSTTMulScale(30)
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MAKECONSTTMulScale(31)
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#undef MAKECONSTTMulScale
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__forceinline SDWORD TMulScale32 (SDWORD a, SDWORD b, SDWORD c, SDWORD d, SDWORD e, SDWORD f)
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{
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__asm mov eax,a
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__asm imul b
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__asm mov ebx,eax
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__asm mov eax,c
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__asm mov ecx,edx
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__asm imul d
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__asm add ebx,eax
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__asm mov eax,e
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__asm adc ecx,edx
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__asm imul f
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__asm add eax,ebx
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__asm adc edx,ecx
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__asm mov eax,edx
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}
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__forceinline SDWORD BoundMulScale (SDWORD a, SDWORD b, SDWORD c)
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{
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__asm mov eax,a
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__asm imul b
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__asm mov ebx,edx
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__asm mov ecx,c
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__asm shrd eax,edx,cl
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__asm sar edx,cl
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__asm xor edx,eax
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__asm js checkit
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__asm xor edx,eax
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__asm jz skipboundit
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__asm cmp edx,0xffffffff
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__asm je skipboundit
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checkit:
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__asm mov eax,ebx
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__asm sar eax,31
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__asm xor eax,0x7fffffff
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skipboundit:
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;
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}
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__forceinline SDWORD DivScale (SDWORD a, SDWORD b, SDWORD c)
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{
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__asm mov eax,a
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__asm mov ecx,c
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__asm shl eax,cl
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__asm mov edx,a
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__asm neg cl
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__asm sar edx,cl
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__asm idiv b
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}
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__forceinline SDWORD DivScale1 (SDWORD a, SDWORD b)
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{
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__asm mov eax,a
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__asm add eax,eax
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__asm sbb edx,edx
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__asm idiv b
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}
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#define MAKECONSTDivScale(s) \
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__forceinline SDWORD DivScale##s (SDWORD a, SDWORD b) \
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{ \
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__asm mov edx,a \
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__asm sar edx,32-s \
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__asm mov eax,a \
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__asm shl eax,s \
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__asm idiv b \
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}
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MAKECONSTDivScale(2)
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MAKECONSTDivScale(3)
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MAKECONSTDivScale(4)
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MAKECONSTDivScale(5)
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MAKECONSTDivScale(6)
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MAKECONSTDivScale(7)
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MAKECONSTDivScale(8)
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MAKECONSTDivScale(9)
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MAKECONSTDivScale(10)
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MAKECONSTDivScale(11)
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MAKECONSTDivScale(12)
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MAKECONSTDivScale(13)
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MAKECONSTDivScale(14)
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MAKECONSTDivScale(15)
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MAKECONSTDivScale(16)
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MAKECONSTDivScale(17)
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MAKECONSTDivScale(18)
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MAKECONSTDivScale(19)
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MAKECONSTDivScale(20)
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MAKECONSTDivScale(21)
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MAKECONSTDivScale(22)
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MAKECONSTDivScale(23)
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MAKECONSTDivScale(24)
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MAKECONSTDivScale(25)
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MAKECONSTDivScale(26)
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MAKECONSTDivScale(27)
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MAKECONSTDivScale(28)
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MAKECONSTDivScale(29)
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MAKECONSTDivScale(30)
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MAKECONSTDivScale(31)
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#undef MAKECONSTDivScale
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__forceinline SDWORD DivScale32 (SDWORD a, SDWORD b)
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{
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__asm mov edx,a
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__asm xor eax,eax
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__asm idiv b
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}
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__forceinline void clearbuf (void *buff, unsigned int count, SDWORD clear)
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{
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SDWORD *b2 = (SDWORD *)buff;
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for (unsigned int i = 0; i != count; ++i)
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{
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b2[i] = clear;
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}
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}
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__forceinline void clearbufshort (void *buff, unsigned int count, WORD clear)
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{
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SWORD *b2 = (SWORD *)buff;
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for (unsigned int i = 0; i != count; ++i)
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{
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b2[i] = clear;
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}
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}
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__forceinline SDWORD ksgn (SDWORD a)
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{
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__asm mov edx,a
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__asm add edx,edx
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__asm sbb eax,eax
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__asm cmp eax,edx
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__asm adc eax,0
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}
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#pragma warning (default: 4035)
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