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/* |
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* types.h - basic types for fpu registers |
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* |
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* Basilisk II (C) 1997-2005 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_TYPES_H |
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#define FPU_TYPES_H |
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|
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#include "sysdeps.h" |
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|
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/* Default behavior is *not* to use long doubles */ |
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#undef USE_LONG_DOUBLE |
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#undef USE_QUAD_DOUBLE |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Original UAE fpu core --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#if defined(FPU_UAE) |
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|
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/* 4-byte floats */ |
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#if SIZEOF_FLOAT == 4 |
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typedef float uae_f32; |
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#elif SIZEOF_DOUBLE == 4 |
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typedef double uae_f32; |
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#else |
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#error "No 4 byte float type, you lose." |
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#endif |
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|
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/* 8-byte floats */ |
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#if SIZEOF_DOUBLE == 8 |
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typedef double uae_f64; |
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#elif SIZEOF_LONG_DOUBLE == 8 |
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typedef long double uae_f64; |
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#else |
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#error "No 8 byte float type, you lose." |
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#endif |
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|
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/* Original UAE FPU registers are only 8 bytes long */ |
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typedef uae_f64 fpu_register; |
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typedef fpu_register fpu_extended; |
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typedef uae_f64 fpu_double; |
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typedef uae_f32 fpu_single; |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Optimized core for x86 --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#elif defined(FPU_X86) |
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|
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/* 4-byte floats */ |
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#if SIZEOF_FLOAT == 4 |
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typedef float uae_f32; |
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#elif SIZEOF_DOUBLE == 4 |
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typedef double uae_f32; |
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#else |
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#error "No 4 byte float type, you lose." |
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#endif |
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|
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/* 8-byte floats */ |
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#if SIZEOF_DOUBLE == 8 |
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typedef float uae_f64; |
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#elif SIZEOF_LONG_DOUBLE == 8 |
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typedef double uae_f64; |
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#else |
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#error "No 8 byte float type, you lose." |
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#endif |
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|
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/* At least 10-byte floats are required */ |
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#if SIZEOF_LONG_DOUBLE >= 10 |
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typedef long double fpu_register; |
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#else |
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#error "No float type at least 10 bytes long, you lose." |
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#endif |
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|
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/* X86 FPU has a custom register type that maps to a native X86 register */ |
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typedef fpu_register fpu_extended; |
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typedef uae_f64 fpu_double; |
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typedef uae_f32 fpu_single; |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- C99 implementation --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#elif defined(FPU_IEEE) |
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|
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#if HOST_FLOAT_FORMAT != IEEE_FLOAT_FORMAT |
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#error "No IEEE float format, you lose." |
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#endif |
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|
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/* 4-byte floats */ |
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#if SIZEOF_FLOAT == 4 |
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typedef float uae_f32; |
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#elif SIZEOF_DOUBLE == 4 |
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typedef double uae_f32; |
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#else |
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#error "No 4 byte float type, you lose." |
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#endif |
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|
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/* 8-byte floats */ |
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#if SIZEOF_DOUBLE == 8 |
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typedef double uae_f64; |
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#elif SIZEOF_LONG_DOUBLE == 8 |
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typedef long double uae_f64; |
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#else |
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#error "No 8 byte float type, you lose." |
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#endif |
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|
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/* 12-byte or 16-byte floats */ |
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#if SIZEOF_LONG_DOUBLE == 12 |
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typedef long double uae_f96; |
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typedef uae_f96 fpu_register; |
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#define USE_LONG_DOUBLE 1 |
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#elif SIZEOF_LONG_DOUBLE == 16 && defined(__x86_64__) |
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/* Long doubles on x86-64 are really held in old x87 FPU stack. */ |
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typedef long double uae_f128; |
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typedef uae_f128 fpu_register; |
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#define USE_LONG_DOUBLE 1 |
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#elif 0 |
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/* Disable for now and probably for good as (i) the emulator |
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implementation is not correct, (ii) I don't know of any CPU which |
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handles this kind of format *natively* with conformance to IEEE. */ |
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typedef long double uae_f128; |
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typedef uae_f128 fpu_register; |
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#define USE_QUAD_DOUBLE 1 |
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#else |
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typedef uae_f64 fpu_register; |
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#endif |
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|
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/* We need all those floating-point types */ |
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typedef fpu_register fpu_extended; |
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typedef uae_f64 fpu_double; |
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typedef uae_f32 fpu_single; |
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|
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#endif |
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|
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#endif /* FPU_TYPES_H */ |
