mirror of
https://github.com/ZDoom/Raze.git
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604 lines
12 KiB
C
604 lines
12 KiB
C
//
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// Microsoft C inline assembler
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//
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//{{{
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#ifdef __pragmas_h__
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#ifndef __pragmas_x86_h__
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#define __pragmas_x86_h__
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static __inline int32_t sqr(int32_t a)
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{
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_asm {
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mov eax, a
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imul eax, eax
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}
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}
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static __inline int32_t scale(int32_t a, int32_t d, int32_t c)
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{
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_asm {
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mov eax, a
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imul d
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idiv c
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}
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}
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static __inline int32_t mulscale(int32_t a, int32_t d, int32_t c)
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{
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_asm {
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mov ecx, c
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mov eax, a
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imul d
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shrd eax, edx, cl
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}
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}
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#define _scaler(x) \
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static __inline int32_t mulscale##x (int32_t a, int32_t d) \
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{ \
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_asm mov eax, a \
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_asm imul d \
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_asm shrd eax, edx, x \
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} \
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static __inline int32_t dmulscale##x (int32_t a, int32_t d, int32_t S, int32_t D) \
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{ \
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_asm mov eax, a \
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_asm imul d \
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_asm mov ebx, eax \
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_asm mov eax, S \
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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, x \
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} \
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PRAGMA_FUNCS
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#undef _scaler
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static __inline int32_t mulscale32(int32_t a, int32_t d)
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{
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_asm {
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mov eax, a
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imul d
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mov eax, edx
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}
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}
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static __inline int32_t dmulscale(int32_t a, int32_t d, int32_t S, int32_t D, int32_t c)
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{
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_asm {
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mov ecx, c
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mov eax, a
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imul d
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mov ebx, eax
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mov eax, S
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mov esi, edx
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imul D
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add eax, ebx
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adc edx, esi
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shrd eax, edx, cl
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}
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}
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static __inline int32_t dmulscale32(int32_t a, int32_t d, int32_t S, int32_t D)
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{
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_asm {
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mov eax, a
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imul d
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mov ebx, eax
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mov eax, S
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mov esi, edx
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imul D
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add eax, ebx
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adc edx, esi
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mov eax, edx
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}
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}
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#ifdef USE_ASM_DIVSCALE
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static __inline int32_t divscale(int32_t a, int32_t b, int32_t c)
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{
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_asm {
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mov eax, a
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mov ecx, c
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mov edx, eax
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shl eax, cl
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neg cl
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sar edx, cl
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idiv b
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}
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}
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static __inline int32_t divscale1(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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add eax, eax
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sbb edx, edx
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idiv b
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}
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}
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static __inline int32_t divscale2(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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mov edx, eax
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sar edx, 30
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lea eax, [eax*4]
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idiv b
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}
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}
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static __inline int32_t divscale3(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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mov edx, eax
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sar edx, 29
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lea eax, [eax*8]
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idiv b
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}
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}
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#define DIVSCALE(x,y) \
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static __inline int32_t divscale##y(int32_t a, int32_t b) \
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{ \
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_asm mov eax, a \
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_asm mov edx, eax \
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_asm sar edx, x \
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_asm shl eax, y \
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_asm idiv b \
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}
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DIVSCALE(28, 4) DIVSCALE(27, 5) DIVSCALE(26, 6) DIVSCALE(25, 7)
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DIVSCALE(24, 8) DIVSCALE(23, 9) DIVSCALE(22, 10) DIVSCALE(21, 11)
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DIVSCALE(20, 12) DIVSCALE(19, 13) DIVSCALE(18, 14) DIVSCALE(17, 15)
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DIVSCALE(16, 16) DIVSCALE(15, 17) DIVSCALE(14, 18) DIVSCALE(13, 19)
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DIVSCALE(12, 20) DIVSCALE(11, 21) DIVSCALE(10, 22) DIVSCALE(9, 23)
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DIVSCALE(8, 24) DIVSCALE(7, 25) DIVSCALE(6, 26) DIVSCALE(5, 27)
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DIVSCALE(4, 28) DIVSCALE(3, 29) DIVSCALE(2, 30) DIVSCALE(1, 31)
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static __inline int32_t divscale32(int32_t d, int32_t b)
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{
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_asm {
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mov edx, d
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xor eax, eax
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idiv b
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}
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}
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#endif // defined USE_ASM_DIVSCALE
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static __inline char readpixel(void *d)
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{
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_asm {
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mov edx, d
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mov al, byte ptr[edx]
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}
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}
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static __inline void drawpixel(void *d, char a)
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{
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_asm {
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mov edx, d
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mov al, a
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mov byte ptr[edx], al
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}
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}
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static __inline void drawpixels(void *d, int16_t a)
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{
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_asm {
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mov edx, d
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mov ax, a
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mov word ptr[edx], ax
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}
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}
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static __inline void drawpixelses(void *d, int32_t a)
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{
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_asm {
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mov edx, d
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mov eax, a
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mov dword ptr[edx], eax
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}
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}
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static __inline void clearbuf(void *d, int32_t c, int32_t a)
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{
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_asm {
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mov edi, d
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mov ecx, c
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mov eax, a
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rep stosd
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}
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}
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static __inline void clearbufbyte(void *d, int32_t c, int32_t a)
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{
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_asm {
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mov edi, d
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mov ecx, c
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mov eax, a
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cmp ecx, 4
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jae longcopy
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test cl, 1
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jz preskip
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stosb
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preskip :
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shr ecx, 1
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rep stosw
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jmp endit
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longcopy :
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test edi, 1
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jz skip1
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stosb
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dec ecx
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skip1 :
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test edi, 2
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jz skip2
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stosw
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sub ecx, 2
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skip2 :
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mov ebx, ecx
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shr ecx, 2
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rep stosd
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test bl, 2
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jz skip3
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stosw
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skip3 :
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test bl, 1
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jz endit
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stosb
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endit :
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}
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}
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static __inline void copybuf(const void *s, void *d, int32_t c)
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{
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_asm {
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mov esi, s
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mov edi, d
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mov ecx, c
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rep movsd
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}
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}
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static __inline void copybufbyte(const void *s, void *d, int32_t c)
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{
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_asm {
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mov esi, s
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mov edi, d
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mov ecx, c
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cmp ecx, 4
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jae longcopy
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test cl, 1
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jz preskip
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movsb
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preskip :
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shr ecx, 1
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rep movsw
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jmp endit
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longcopy :
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test edi, 1
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jz skip1
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movsb
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dec ecx
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skip1 :
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test edi, 2
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jz skip2
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movsw
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sub ecx, 2
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skip2 :
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mov ebx, ecx
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shr ecx, 2
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rep movsd
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test bl, 2
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jz skip3
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movsw
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skip3 :
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test bl, 1
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jz endit
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movsb
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endit :
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}
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}
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static __inline void copybufreverse(const void *s, void *d, int32_t c)
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{
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_asm {
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mov esi, s
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mov edi, d
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mov ecx, c
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shr ecx, 1
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jnc skipit1
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mov al, byte ptr[esi]
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dec esi
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mov byte ptr[edi], al
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inc edi
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skipit1 :
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shr ecx, 1
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jnc skipit2
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mov ax, word ptr[esi-1]
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sub esi, 2
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ror ax, 8
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mov word ptr[edi], ax
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add edi, 2
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skipit2:
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test ecx, ecx
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jz endloop
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begloop :
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mov eax, dword ptr[esi-3]
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sub esi, 4
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bswap eax
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mov dword ptr[edi], eax
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add edi, 4
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dec ecx
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jnz begloop
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endloop :
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}
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}
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static __inline void qinterpolatedown16(int32_t a, int32_t c, int32_t d, int32_t s)
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{
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_asm {
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mov eax, a
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mov ecx, c
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mov edx, d
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mov esi, s
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mov ebx, ecx
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shr ecx, 1
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jz skipbegcalc
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begqcalc :
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lea edi, [edx+esi]
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sar edx, 16
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mov dword ptr[eax], edx
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lea edx, [edi+esi]
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sar edi, 16
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mov dword ptr[eax+4], edi
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add eax, 8
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dec ecx
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jnz begqcalc
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test ebx, 1
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jz skipbegqcalc2
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skipbegcalc :
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sar edx, 16
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mov dword ptr[eax], edx
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skipbegqcalc2 :
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}
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}
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static __inline void qinterpolatedown16short(int32_t a, int32_t c, int32_t d, int32_t s)
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{
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_asm {
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mov eax, a
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mov ecx, c
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mov edx, d
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mov esi, s
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test ecx, ecx
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jz endit
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test al, 2
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jz skipalignit
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mov ebx, edx
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sar ebx, 16
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mov word ptr[eax], bx
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add edx, esi
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add eax, 2
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dec ecx
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jz endit
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skipalignit :
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sub ecx, 2
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jc finishit
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begqcalc :
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mov ebx, edx
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add edx, esi
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sar ebx, 16
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mov edi, edx
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and edi, 0ffff0000h
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add edx, esi
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add ebx, edi
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mov dword ptr[eax], ebx
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add eax, 4
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sub ecx, 2
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jnc begqcalc
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test cl, 1
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jz endit
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finishit :
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mov ebx, edx
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sar ebx, 16
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mov word ptr[eax], bx
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endit :
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}
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}
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//returns eax/ebx, dmval = eax%edx;
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static __inline int32_t divmod(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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xor edx, edx
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div b
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mov dmval, edx
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}
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}
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//returns eax%ebx, dmval = eax/edx;
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static __inline int32_t moddiv(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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xor edx, edx
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div b
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mov dmval, eax
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mov eax, edx
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}
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}
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static __inline int32_t klabs(int32_t a)
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{
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_asm {
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mov eax, a
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test eax, eax
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jns skipnegate
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neg eax
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skipnegate :
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}
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}
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static __inline int32_t ksgn(int32_t b)
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{
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_asm {
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mov ebx, b
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add ebx, ebx
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sbb eax, eax
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cmp eax, ebx
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adc al, 0
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}
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}
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//eax = (unsigned min)umin(eax,ebx)
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static __inline int32_t umin(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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sub eax, b
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sbb ecx, ecx
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and eax, ecx
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add eax, b
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}
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}
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//eax = (unsigned max)umax(eax,ebx)
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static __inline int32_t umax(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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sub eax, b
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sbb ecx, ecx
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xor ecx, 0xffffffff
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and eax, ecx
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add eax, b
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}
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}
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static __inline int32_t kmin(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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mov ebx, b
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cmp eax, ebx
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jl skipit
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mov eax, ebx
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skipit :
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}
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}
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static __inline int32_t kmax(int32_t a, int32_t b)
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{
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_asm {
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mov eax, a
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mov ebx, b
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cmp eax, ebx
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jg skipit
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mov eax, ebx
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skipit :
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}
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}
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static __inline void swapchar(void *a, void *b)
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{
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_asm {
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mov eax, a
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mov ebx, b
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mov cl, [eax]
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mov ch, [ebx]
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mov[ebx], cl
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mov[eax], ch
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}
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}
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static __inline void swapshort(void *a, void *b)
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{
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_asm {
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mov eax, a
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mov ebx, b
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mov cx, [eax]
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mov dx, [ebx]
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mov[ebx], cx
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mov[eax], dx
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}
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}
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static __inline void swaplong(void *a, void *b)
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{
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_asm {
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mov eax, a
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mov ebx, b
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mov ecx, [eax]
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mov edx, [ebx]
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mov[ebx], ecx
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mov[eax], edx
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}
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}
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#define swapfloat swaplong
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static __inline void swapbuf4(void *a, void *b, int32_t c)
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{
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_asm {
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mov eax, a
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mov ebx, b
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mov ecx, c
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begswap :
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mov esi, [eax]
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mov edi, [ebx]
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mov[ebx], esi
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mov[eax], edi
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add eax, 4
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add ebx, 4
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dec ecx
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jnz short begswap
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}
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}
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static __inline void swap64bit(void *a, void *b)
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{
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_asm {
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mov eax, a
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mov ebx, b
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mov ecx, [eax]
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mov edx, [ebx]
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mov[ebx], ecx
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mov ecx, [eax+4]
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mov[eax], edx
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mov edx, [ebx+4]
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mov[ebx+4], ecx
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mov[eax+4], edx
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}
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}
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//swapchar2(ptr1,ptr2,xsiz); is the same as:
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//swapchar(ptr1,ptr2); swapchar(ptr1+1,ptr2+xsiz);
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static __inline void swapchar2(void *a, void *b, int32_t s)
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{
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_asm {
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mov eax, a
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mov ebx, b
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mov esi, s
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add esi, ebx
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mov cx, [eax]
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mov dl, [ebx]
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mov[ebx], cl
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mov dh, [esi]
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mov[esi], ch
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mov[eax], dx
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}
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}
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//}}}
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#endif // __pragmas_x86_h__
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#endif // __pragmas_h__
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