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/* |
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* fpu/exceptions.h - system-dependant FPU exceptions management |
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* |
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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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* Original UAE FPU, copyright 1996 Herman ten Brugge |
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* Rewrite for x86, copyright 1999-2000 Lauri Pesonen |
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* New framework, copyright 2000 Gwenole Beauchesne |
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* Adapted for JIT compilation (c) Bernd Meyer, 2000 |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#ifndef FPU_EXCEPTIONS_H |
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#define FPU_EXCEPTIONS_H |
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|
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/* NOTE: this file shall be included only from fpu/fpu_*.cpp */ |
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#undef PUBLIC |
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#define PUBLIC extern |
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|
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#undef PRIVATE |
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#define PRIVATE static |
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|
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#undef FFPU |
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#define FFPU /**/ |
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|
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#undef FPU |
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#define FPU fpu. |
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|
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/* Defaults to generic exceptions */ |
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#define FPU_USE_GENERIC_EXCEPTIONS |
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#define FPU_USE_GENERIC_ACCRUED_EXCEPTIONS |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Selection of floating-point exceptions handling mode --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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/* Optimized i386 fpu core must use native exceptions */ |
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#if defined(FPU_X86) && defined(USE_X87_ASSEMBLY) |
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# undef FPU_USE_GENERIC_EXCEPTIONS |
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# define FPU_USE_X86_EXCEPTIONS |
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#endif |
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|
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/* Optimized i386 fpu core must use native accrued exceptions */ |
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#if defined(FPU_X86) && defined(USE_X87_ASSEMBLY) |
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# undef FPU_USE_GENERIC_ACCRUED_EXCEPTIONS |
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# define FPU_USE_X86_ACCRUED_EXCEPTIONS |
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#endif |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Native X86 Exceptions --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#ifdef FPU_USE_X86_EXCEPTIONS |
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|
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/* Extend the SW_* codes */ |
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#define SW_FAKE_BSUN SW_SF |
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|
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/* Shorthand */ |
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#define SW_EXCEPTION_MASK (SW_ES|SW_SF|SW_PE|SW_UE|SW_OE|SW_ZE|SW_DE|SW_IE) |
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// #define SW_EXCEPTION_MASK (SW_SF|SW_PE|SW_UE|SW_OE|SW_ZE|SW_DE|SW_IE) |
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|
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/* Lookup tables */ |
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PRIVATE uae_u32 exception_host2mac[ 0x80 ]; |
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PRIVATE uae_u32 exception_mac2host[ 0x100 ]; |
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|
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/* Initialize native exception management */ |
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PUBLIC void FFPU fpu_init_native_exceptions(void); |
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|
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/* Return m68k floating-point exception status */ |
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PRIVATE inline uae_u32 FFPU get_exception_status(void) |
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{ return exception_host2mac[FPU fpsr.exception_status & (SW_FAKE_BSUN|SW_PE|SW_UE|SW_OE|SW_ZE|SW_DE|SW_IE)]; } |
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|
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/* Set new exception status. Assumes mask against FPSR_EXCEPTION to be already performed */ |
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PRIVATE inline void FFPU set_exception_status(uae_u32 new_status) |
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{ FPU fpsr.exception_status = exception_mac2host[new_status >> 8]; } |
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|
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#endif /* FPU_USE_X86_EXCEPTIONS */ |
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|
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#ifdef FPU_USE_X86_ACCRUED_EXCEPTIONS |
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|
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/* Lookup tables */ |
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PRIVATE uae_u32 accrued_exception_host2mac[ 0x40 ]; |
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PRIVATE uae_u32 accrued_exception_mac2host[ 0x20 ]; |
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|
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/* Initialize native accrued exception management */ |
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PUBLIC void FFPU fpu_init_native_accrued_exceptions(void); |
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|
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/* Return m68k accrued exception byte */ |
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PRIVATE inline uae_u32 FFPU get_accrued_exception(void) |
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{ return accrued_exception_host2mac[FPU fpsr.accrued_exception & (SW_PE|SW_UE|SW_OE|SW_ZE|SW_DE|SW_IE)]; } |
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|
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/* Set new accrued exception byte */ |
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PRIVATE inline void FFPU set_accrued_exception(uae_u32 new_status) |
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{ FPU fpsr.accrued_exception = accrued_exception_mac2host[(new_status & 0xF8) >> 3]; } |
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|
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#endif /* FPU_USE_X86_ACCRUED_EXCEPTIONS */ |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Default Exceptions Handling --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#ifdef FPU_USE_GENERIC_EXCEPTIONS |
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|
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/* Initialize native exception management */ |
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static inline void FFPU fpu_init_native_exceptions(void) |
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{ } |
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|
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/* Return m68k floating-point exception status */ |
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PRIVATE inline uae_u32 FFPU get_exception_status(void) |
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{ return FPU fpsr.exception_status; } |
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|
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/* Set new exception status. Assumes mask against FPSR_EXCEPTION to be already performed */ |
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PRIVATE inline void FFPU set_exception_status(uae_u32 new_status) |
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{ FPU fpsr.exception_status = new_status; } |
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|
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#endif /* FPU_USE_GENERIC_EXCEPTIONS */ |
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|
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#ifdef FPU_USE_GENERIC_ACCRUED_EXCEPTIONS |
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|
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/* Initialize native accrued exception management */ |
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PRIVATE inline void FFPU fpu_init_native_accrued_exceptions(void) |
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{ } |
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|
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/* Return m68k accrued exception byte */ |
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PRIVATE inline uae_u32 FFPU get_accrued_exception(void) |
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{ return FPU fpsr.accrued_exception; } |
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|
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/* Set new accrued exception byte */ |
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PRIVATE inline void FFPU set_accrued_exception(uae_u32 new_status) |
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{ FPU fpsr.accrued_exception = new_status; } |
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|
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#endif /* FPU_USE_GENERIC_ACCRUED_EXCEPTIONS */ |
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|
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#endif /* FPU_EXCEPTIONS_H */ |
