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168 lines
5.5 KiB
C
168 lines
5.5 KiB
C
// This file has been modified from Ken Silverman's original release
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// by Jonathon Fowler (jf@jonof.id.au)
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#ifndef __pragmas_h__
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#define __pragmas_h__
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#ifdef EXTERNC
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extern "C" {
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#endif
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#include <limits.h>
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#define PRAGMA_FUNCS _scaler(1) _scaler(2) _scaler(3) _scaler(4)\
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_scaler(5) _scaler(6) _scaler(7) _scaler(8)\
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_scaler(9) _scaler(10) _scaler(11) _scaler(12)\
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_scaler(13) _scaler(14) _scaler(15) _scaler(16)\
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_scaler(17) _scaler(18) _scaler(19) _scaler(20)\
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_scaler(21) _scaler(22) _scaler(23) _scaler(24)\
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_scaler(25) _scaler(26) _scaler(27) _scaler(28)\
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_scaler(29) _scaler(30) _scaler(31)
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extern int32_t dmval;
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// break the C version of divscale out from the others
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// because asm version overflows in drawmapview()
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#define qw(x) ((int64_t)(x)) // quadword cast
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#define dw(x) ((int32_t)(x)) // doubleword cast
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#define wo(x) ((int16_t)(x)) // word cast
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#define by(x) ((uint8_t)(x)) // byte cast
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// XXX: Only for testing on x86. Don't use from outside; it doesn't account for
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// whether we're compiling for e.g. x86_64 which will never use asm anyway.
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//#define USE_ASM_DIVSCALE
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#if !defined USE_ASM_DIVSCALE
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#ifdef GEKKO
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#include <math.h>
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static inline int32_t divscale(int32_t eax, int32_t ebx, int32_t ecx)
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{
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return ldexp(eax, ecx) / ebx;
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}
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# define _scaler(a) \
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static inline int32_t divscale##a(int32_t eax, int32_t ebx) \
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{ \
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return divscale(eax, ebx, a); \
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} \
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#else
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static inline int32_t divscale(int32_t eax, int32_t ebx, int32_t ecx) { return dw((qw(eax) << by(ecx)) / ebx); }
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# define _scaler(a) \
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static inline int32_t divscale##a(int32_t eax, int32_t ebx) \
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{ \
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return dw((qw(eax) << by(a)) / ebx); \
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} \
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#endif
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PRAGMA_FUNCS _scaler(32)
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#undef _scaler
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#endif // !defined USE_ASM_DIVSCALE
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#if defined(__GNUC__) && defined(GEKKO)
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// GCC Inline Assembler version (PowerPC)
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#include "pragmas_ppc.h"
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#elif defined(__GNUC__) && defined(__i386__) && !defined(NOASM)
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// GCC Inline Assembler version (x86)
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#include "pragmas_x86_gcc.h"
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#elif defined(_MSC_VER) && !defined(NOASM) // __GNUC__
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// Microsoft C inline assembler
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#include "pragmas_x86_msvc.h"
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#elif defined(__arm__) // _MSC_VER
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// GCC Inline Assembler version (ARM)
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#include "pragmas_arm.h"
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#else
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//
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// Generic C
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//
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#define _scaler(a) \
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static inline int32_t mulscale##a(int32_t eax, int32_t edx) \
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{ \
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return dw((qw(eax) * qw(edx)) >> by(a)); \
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} \
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\
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static inline int32_t dmulscale##a(int32_t eax, int32_t edx, int32_t esi, int32_t edi) \
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{ \
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return dw(((qw(eax) * qw(edx)) + (qw(esi) * qw(edi))) >> by(a)); \
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} \
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\
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PRAGMA_FUNCS _scaler(32)
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#undef _scaler
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static inline void swapchar(void* a, void* b) { char t = *((char*)b); *((char*)b) = *((char*)a); *((char*)a) = t; }
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static inline void swapchar2(void* a, void* b, int32_t s) { swapchar(a,b); swapchar((char*)a+1,(char*)b+s); }
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static inline void swapshort(void* a, void* b) { int16_t t = *((int16_t*)b); *((int16_t*)b) = *((int16_t*)a); *((int16_t*)a) = t; }
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static inline void swaplong(void* a, void* b) { int32_t t = *((int32_t*)b); *((int32_t*)b) = *((int32_t*)a); *((int32_t*)a) = t; }
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static inline void swapfloat(void* a, void* b) { float t = *((float*)b); *((float*)b) = *((float*)a); *((float*)a) = t; }
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static inline void swap64bit(void* a, void* b) { int64_t t = *((int64_t*)b); *((int64_t*)b) = *((int64_t*)a); *((int64_t*)a) = t; }
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static inline char readpixel(void* s) { return (*((char*)(s))); }
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static inline void drawpixel(void* s, char a) { *((char*)(s)) = a; }
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static inline void drawpixels(void* s, int16_t a) { *((int16_t*)(s)) = a; }
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static inline void drawpixelses(void* s, int32_t a) { *((int32_t*)(s)) = a; }
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static inline int32_t divmod(int32_t a, int32_t b) { uint32_t _a=(uint32_t)a, _b=(uint32_t)b; dmval = _a%_b; return _a/_b; }
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static inline int32_t moddiv(int32_t a, int32_t b) { uint32_t _a=(uint32_t)a, _b=(uint32_t)b; dmval = _a/_b; return _a%_b; }
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static inline int32_t klabs(int32_t a) { const uint32_t m = a >> (sizeof(int) * CHAR_BIT - 1); return (a ^ m) - m; }
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static inline int32_t ksgn(int32_t a) { return (a>0)-(a<0); }
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static inline int32_t umin(int32_t a, int32_t b) { if ((uint32_t)a < (uint32_t)b) return a; return b; }
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static inline int32_t umax(int32_t a, int32_t b) { if ((uint32_t)a < (uint32_t)b) return b; return a; }
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static inline int32_t kmin(int32_t a, int32_t b) { if ((int32_t)a < (int32_t)b) return a; return b; }
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static inline int32_t kmax(int32_t a, int32_t b) { if ((int32_t)a < (int32_t)b) return b; return a; }
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static inline int32_t sqr(int32_t eax) { return (eax) * (eax); }
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static inline int32_t scale(int32_t eax, int32_t edx, int32_t ecx) { return dw((qw(eax) * edx) / ecx); }
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static inline int32_t mulscale(int32_t eax, int32_t edx, int32_t ecx) { return dw((qw(eax) * edx) >> by(ecx)); }
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static inline int32_t dmulscale(int32_t eax, int32_t edx, int32_t esi, int32_t edi, int32_t ecx) { return dw(((qw(eax) * edx) + (qw(esi) * edi)) >> by(ecx)); }
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void qinterpolatedown16 (intptr_t bufptr, int32_t num, int32_t val, int32_t add);
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void qinterpolatedown16short (intptr_t bufptr, int32_t num, int32_t val, int32_t add);
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void clearbuf(void* d, int32_t c, int32_t a);
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void copybuf(const void* s, void* d, int32_t c);
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void swapbuf4(void* a, void* b, int32_t c);
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void clearbufbyte(void *D, int32_t c, int32_t a);
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void copybufbyte(const void *S, void *D, int32_t c);
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void copybufreverse(const void *S, void *D, int32_t c);
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#endif
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#undef qw
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#undef dw
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#undef wo
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#undef by
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static inline void swapbufreverse(void *s, void *d, int32_t c)
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{
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uint8_t *src = (uint8_t*)s, *dst = (uint8_t*)d;
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while (c--) {
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swapchar(dst++, src--);
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}
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}
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#ifdef EXTERNC
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}
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#endif
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#endif // __pragmas_h__
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