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pragmas.h: introduce preprocessor switch USE_ASM_DIVSCALE, for testing only.

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git-svn-id: https://svn.eduke32.com/eduke32@4577 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2014-08-23 10:28:17 +00:00
parent fb7fb403e0
commit 81d3e4db73
1 changed files with 13 additions and 4 deletions
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17
polymer/eduke32/build/include/pragmas.h
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@ -20,6 +20,11 @@ extern int32_t dmval;
#define dw(x) ((int32_t)(x)) // doubleword cast
#define by(x) ((uint8_t)(x)) // byte cast
// XXX: Only for testing on x86. Don't use from outside; it doesn't account for
// whether we're compiling for e.g. x86_64 which will never use asm anyway.
//#define USE_ASM_DIVSCALE
#if !defined USE_ASM_DIVSCALE
#ifdef GEKKO
#include <math.h>
static inline int32_t divscale(int32_t eax, int32_t ebx, int32_t ecx)
@ -57,6 +62,7 @@ _scaler(29) _scaler(30) _scaler(31) _scaler(32)
#undef dw
#undef by
#undef _scaler
#endif // !defined USE_ASM_DIVSCALE
#if defined(__GNUC__) && defined(GEKKO)
@ -1163,7 +1169,7 @@ void copybufreverse(const void *S, void *D, int32_t c);
: "a" (__a), "d" (__d), "b" (__b), "c" (__c), "S" (__S), "D" (__D) : "cc"); \
__d; })
#if 0
#ifdef USE_ASM_DIVSCALE
#define divscale(a,b,c) \
({ int32_t __a=(a), __b=(b), __c=(c); \
__asm__ __volatile__ ("movl %%eax, %%edx; shll %%cl, %%eax; negb %%cl; sarl %%cl, %%edx; idivl %%ebx" \
@ -1329,7 +1335,8 @@ void copybufreverse(const void *S, void *D, int32_t c);
__asm__ __volatile__ ("xorl %%eax, %%eax; idivl %%ebx" \
: "=a" (__r), "=d" (__d) : "d" (__d), "b" (__b) : "cc"); \
__r; })
#endif
#endif // defined USE_ASM_DIVSCALE
#define readpixel(D) \
({ void *__D=(D); int32_t __a; \
__asm__ __volatile__ ("movb (%%edi), %%al" \
@ -1676,7 +1683,8 @@ static __inline int32_t boundmulscale(int32_t a, int32_t b, int32_t c)
skipboundit:
}
}
#if 0
#ifdef USE_ASM_DIVSCALE
static __inline int32_t divscale(int32_t a, int32_t b, int32_t c)
{
_asm {
@ -1748,7 +1756,8 @@ static __inline int32_t divscale32(int32_t d, int32_t b)
idiv b
}
}
#endif
#endif // defined USE_ASM_DIVSCALE
static __inline char readpixel(void *d)
{
_asm {