mirror of
https://github.com/kanjitalk755/macemu.git
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184 lines
5.0 KiB
C
184 lines
5.0 KiB
C
/*
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* fpu/types.h - basic types for fpu registers
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*
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* Copyright (c) 2001-2004 Milan Jurik of ARAnyM dev team (see AUTHORS)
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*
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* Inspired by Christian Bauer's Basilisk II
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*
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* This file is part of the ARAnyM project which builds a new and powerful
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* TOS/FreeMiNT compatible virtual machine running on almost any hardware.
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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 1999-2001 Lauri Pesonen
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* New framework, copyright 2000-2001 Gwenole Beauchesne
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* Adapted for JIT compilation (c) Bernd Meyer, 2000-2001
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*
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* ARAnyM 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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* ARAnyM 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 ARAnyM; 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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#ifndef FPU_TYPES_H
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#define FPU_TYPES_H
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#include "sysdeps.h"
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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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/* --- Original UAE fpu core --- */
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/* -------------------------------------------------------------------------- */
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#if defined(FPU_UAE)
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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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/* 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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/* 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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/* --- Optimized core for x86 --- */
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/* -------------------------------------------------------------------------- */
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#elif defined(FPU_X86)
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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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/* 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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/* 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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/* 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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/* --- C99 implementation --- */
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/* -------------------------------------------------------------------------- */
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#elif defined(FPU_IEEE)
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#if 0
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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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#endif
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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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/* 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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/* 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(CPU_i386) || defined(CPU_x86_64) || defined(CPU_ia64))
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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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/* 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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#elif defined(FPU_MPFR)
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#include <mpfr.h>
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struct fpu_register {
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mpfr_t f;
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uae_u64 nan_bits;
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int nan_sign;
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operator long double ();
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fpu_register &operator=(long double);
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};
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#endif
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union fpu_register_parts {
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fpu_register val;
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uae_u32 parts[sizeof(fpu_register) / 4];
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};
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#endif /* FPU_TYPES_H */
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