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/* |
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* fpu/rounding.h - system-dependant FPU rounding mode and precision |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* Basilisk II (C) 1997-2008 Christian Bauer |
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* |
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* MC68881/68040 fpu emulation |
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* |
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/* -------------------------------------------------------------------------- */ |
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/* Optimized i386 fpu core must use native rounding mode */ |
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#if defined(FPU_X86) && defined(X86_ASSEMBLY) |
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#if defined(FPU_X86) && defined(USE_X87_ASSEMBLY) |
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# undef FPU_USE_GENERIC_ROUNDING_MODE |
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# define FPU_USE_X86_ROUNDING_MODE |
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#endif |
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/* Optimized i386 fpu core must use native rounding precision */ |
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#if defined(FPU_X86) && defined(X86_ASSEMBLY) |
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#if defined(FPU_X86) && defined(USE_X87_ASSEMBLY) |
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# undef FPU_USE_GENERIC_ROUNDING_PRECISION |
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# define FPU_USE_X86_ROUNDING_PRECISION |
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#endif |
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#if 0 // gb-- FIXME: that doesn't work |
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/* IEEE-based fpu core can have native rounding mode on i386 */ |
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#if defined(FPU_IEEE) && defined(X86_ASSEMBLY) |
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#if defined(FPU_IEEE) && defined(USE_X87_ASSEMBLY) |
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# undef FPU_USE_GENERIC_ROUNDING_MODE |
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# define FPU_USE_X86_ROUNDING_MODE |
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#endif |
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/* IEEE-based fpu core can have native rounding precision on i386 */ |
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#if defined(FPU_IEEE) && defined(X86_ASSEMBLY) |
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#if defined(FPU_IEEE) && defined(USE_X87_ASSEMBLY) |
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# undef FPU_USE_GENERIC_ROUNDING_PRECISION |
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# define FPU_USE_X86_ROUNDING_PRECISION |
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#endif |
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#if defined(FPU_USE_GENERIC_ROUNDING_MODE) || defined(FPU_USE_X86_ROUNDING_MODE) |
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/* Return the current rounding mode in m68k format */ |
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PUBLIC inline uae_u32 FFPU get_rounding_mode(void) |
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static inline uae_u32 FFPU get_rounding_mode(void) |
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{ return FPU fpcr.rounding_mode; } |
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/* Convert and set to native rounding mode */ |
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PUBLIC inline void FFPU set_rounding_mode(uae_u32 new_rounding_mode) |
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static inline void FFPU set_rounding_mode(uae_u32 new_rounding_mode) |
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{ FPU fpcr.rounding_mode = new_rounding_mode; } |
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#endif |
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#if defined(FPU_USE_GENERIC_ROUNDING_PRECISION) || defined(FPU_USE_X86_ROUNDING_PRECISION) |
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/* Return the current rounding precision in m68k format */ |
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PUBLIC inline uae_u32 FFPU get_rounding_precision(void) |
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static inline uae_u32 FFPU get_rounding_precision(void) |
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{ return FPU fpcr.rounding_precision; } |
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/* Convert and set to native rounding precision */ |
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PUBLIC inline void FFPU set_rounding_precision(uae_u32 new_rounding_precision) |
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static inline void FFPU set_rounding_precision(uae_u32 new_rounding_precision) |
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{ FPU fpcr.rounding_precision = new_rounding_precision; } |
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#endif |
