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Ported Lauri's FPU core to GCC/i386

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gbeauche 2000-09-05 16:54:42 +00:00
parent fdf9c9938a
commit 9b2887536f
3 changed files with 6710 additions and 0 deletions
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6459
BasiliskII/src/uae_cpu/fpu_x86.cpp Normal file
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BasiliskII/src/uae_cpu/fpu_x86.h Normal file
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/*
* fpu_x86.h - 68881/68040 fpu code for x86/Windows and Linux/x86.
*
* Basilisk II (C) 1997-1999 Christian Bauer
*
* MC68881 emulation
*
* Based on UAE FPU, original copyright 1996 Herman ten Brugge,
* rewritten by Lauri Pesonen 1999-2000,
* accomodated to GCC's Extended Asm syntax by Gwenole Beauchesne 2000.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* gb-- defined in newcpu.h
// is_integral: true == 68040, false == 68881
void fpu_set_integral_fpu( bool is_integral );
// MUST be called before the cpu starts up.
void fpu_init( void );
// Finalize.
void fpu_exit( void );
// Soft reset.
void fpu_reset( void );
*/
// The same as original. "ftrapcc_opp" is bound to change soon.
/* gb-- defined in newcpu.h
void REGPARAM2 fpp_opp (uae_u32, uae_u16);
void REGPARAM2 fdbcc_opp (uae_u32, uae_u16);
void REGPARAM2 fscc_opp (uae_u32, uae_u16);
void REGPARAM2 ftrapcc_opp (uae_u32,uaecptr);
void REGPARAM2 fbcc_opp (uae_u32, uaecptr, uae_u32);
void REGPARAM2 fsave_opp (uae_u32);
void REGPARAM2 frestore_opp (uae_u32);
*/
/* ---------------------------- Motorola ---------------------------- */
// Exception byte
#define BSUN 0x00008000
#define SNAN 0x00004000
#define OPERR 0x00002000
#define OVFL 0x00001000
#define UNFL 0x00000800
#define DZ 0x00000400
#define INEX2 0x00000200
#define INEX1 0x00000100
// Accrued exception byte
#define ACCR_IOP 0x80
#define ACCR_OVFL 0x40
#define ACCR_UNFL 0x20
#define ACCR_DZ 0x10
#define ACCR_INEX 0x08
// fpcr rounding modes
#define ROUND_CONTROL_MASK 0x30
#define ROUND_TO_NEAREST 0
#define ROUND_TO_ZERO 0x10
#define ROUND_TO_NEGATIVE_INFINITY 0x20
#define ROUND_TO_POSITIVE_INFINITY 0x30
// fpcr precision control
#define PRECISION_CONTROL_MASK 0xC0
#define PRECISION_CONTROL_EXTENDED 0
#define PRECISION_CONTROL_DOUBLE 0x80
#define PRECISION_CONTROL_SINGLE 0x40
#define PRECISION_CONTROL_UNDEFINED 0xC0
/* ---------------------------- Intel ---------------------------- */
#define CW_RESET 0x0040 // initial CW value after RESET
#define CW_FINIT 0x037F // initial CW value after FINIT
#define SW_RESET 0x0000 // initial SW value after RESET
#define SW_FINIT 0x0000 // initial SW value after FINIT
#define TW_RESET 0x5555 // initial TW value after RESET
#define TW_FINIT 0x0FFF // initial TW value after FINIT
#define CW_X 0x1000 // infinity control
#define CW_RC_ZERO 0x0C00 // rounding control toward zero
#define CW_RC_UP 0x0800 // rounding control toward +
#define CW_RC_DOWN 0x0400 // rounding control toward -
#define CW_RC_NEAR 0x0000 // rounding control toward even
#define CW_PC_EXTENDED 0x0300 // precision control 64bit
#define CW_PC_DOUBLE 0x0200 // precision control 53bit
#define CW_PC_RESERVED 0x0100 // precision control reserved
#define CW_PC_SINGLE 0x0000 // precision control 24bit
#define CW_PM 0x0020 // precision exception mask
#define CW_UM 0x0010 // underflow exception mask
#define CW_OM 0x0008 // overflow exception mask
#define CW_ZM 0x0004 // zero divide exception mask
#define CW_DM 0x0002 // denormalized operand exception mask
#define CW_IM 0x0001 // invalid operation exception mask
#define SW_B 0x8000 // busy flag
#define SW_C3 0x4000 // condition code flag 3
#define SW_TOP_7 0x3800 // top of stack = ST(7)
#define SW_TOP_6 0x3000 // top of stack = ST(6)
#define SW_TOP_5 0x2800 // top of stack = ST(5)
#define SW_TOP_4 0x2000 // top of stack = ST(4)
#define SW_TOP_3 0x1800 // top of stack = ST(3)
#define SW_TOP_2 0x1000 // top of stack = ST(2)
#define SW_TOP_1 0x0800 // top of stack = ST(1)
#define SW_TOP_0 0x0000 // top of stack = ST(0)
#define SW_C2 0x0400 // condition code flag 2
#define SW_C1 0x0200 // condition code flag 1
#define SW_C0 0x0100 // condition code flag 0
#define SW_ES 0x0080 // error summary status flag
#define SW_SF 0x0040 // stack fault flag
#define SW_PE 0x0020 // precision exception flag
#define SW_UE 0x0010 // underflow exception flag
#define SW_OE 0x0008 // overflow exception flag
#define SW_ZE 0x0004 // zero divide exception flag
#define SW_DE 0x0002 // denormalized operand exception flag
#define SW_IE 0x0001 // invalid operation exception flag
#define X86_ROUND_CONTROL_MASK 0x0C00
#define X86_PRECISION_CONTROL_MASK 0x0300

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BasiliskII/src/uae_cpu/fpu_x86_asm.h Normal file
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// gb-- stupid hack to insert macros in the generated assembly file
static void fpu_emit_macro_definitions()
{
# define DEFINE_MACRO(name, value) \
__asm__ __volatile__ (#name ## " = " #value)
DEFINE_MACRO(BSUN, 0x00008000);
DEFINE_MACRO(SNAN, 0x00004000);
DEFINE_MACRO(OPERR, 0x00002000);
DEFINE_MACRO(OVFL, 0x00001000);
DEFINE_MACRO(UNFL, 0x00000800);
DEFINE_MACRO(DZ, 0x00000400);
DEFINE_MACRO(INEX2, 0x00000200);
DEFINE_MACRO(INEX1, 0x00000100);
DEFINE_MACRO(ACCR_IOP, 0x80);
DEFINE_MACRO(ACCR_OVFL, 0x40);
DEFINE_MACRO(ACCR_UNFL, 0x20);
DEFINE_MACRO(ACCR_DZ, 0x10);
DEFINE_MACRO(ACCR_INEX, 0x08);
DEFINE_MACRO(ROUND_CONTROL_MASK, 0x30);
DEFINE_MACRO(ROUND_TO_NEAREST, 0);
DEFINE_MACRO(ROUND_TO_ZERO, 0x10);
DEFINE_MACRO(ROUND_TO_NEGATIVE_INFINITY, 0x20);
DEFINE_MACRO(ROUND_TO_POSITIVE_INFINITY, 0x30);
DEFINE_MACRO(PRECISION_CONTROL_MASK, 0xC0);
DEFINE_MACRO(PRECISION_CONTROL_EXTENDED, 0);
DEFINE_MACRO(PRECISION_CONTROL_DOUBLE, 0x80);
DEFINE_MACRO(PRECISION_CONTROL_SINGLE, 0x40);
DEFINE_MACRO(PRECISION_CONTROL_UNDEFINED, 0xC0);
DEFINE_MACRO(CW_RESET, 0x0040);
DEFINE_MACRO(CW_FINIT, 0x037F);
DEFINE_MACRO(SW_RESET, 0x0000);
DEFINE_MACRO(SW_FINIT, 0x0000);
DEFINE_MACRO(TW_RESET, 0x5555);
DEFINE_MACRO(TW_FINIT, 0x0FFF);
DEFINE_MACRO(CW_X, 0x1000);
DEFINE_MACRO(CW_RC_ZERO, 0x0C00);
DEFINE_MACRO(CW_RC_UP, 0x0800);
DEFINE_MACRO(CW_RC_DOWN, 0x0400);
DEFINE_MACRO(CW_RC_NEAR, 0x0000);
DEFINE_MACRO(CW_PC_EXTENDED, 0x0300);
DEFINE_MACRO(CW_PC_DOUBLE, 0x0200);
DEFINE_MACRO(CW_PC_RESERVED, 0x0100);
DEFINE_MACRO(CW_PC_SINGLE, 0x0000);
DEFINE_MACRO(CW_PM, 0x0020);
DEFINE_MACRO(CW_UM, 0x0010);
DEFINE_MACRO(CW_OM, 0x0008);
DEFINE_MACRO(CW_ZM, 0x0004);
DEFINE_MACRO(CW_DM, 0x0002);
DEFINE_MACRO(CW_IM, 0x0001);
DEFINE_MACRO(SW_B, 0x8000);
DEFINE_MACRO(SW_C3, 0x4000);
DEFINE_MACRO(SW_TOP_7, 0x3800);
DEFINE_MACRO(SW_TOP_6, 0x3000);
DEFINE_MACRO(SW_TOP_5, 0x2800);
DEFINE_MACRO(SW_TOP_4, 0x2000);
DEFINE_MACRO(SW_TOP_3, 0x1800);
DEFINE_MACRO(SW_TOP_2, 0x1000);
DEFINE_MACRO(SW_TOP_1, 0x0800);
DEFINE_MACRO(SW_TOP_0, 0x0000);
DEFINE_MACRO(SW_C2, 0x0400);
DEFINE_MACRO(SW_C1, 0x0200);
DEFINE_MACRO(SW_C0, 0x0100);
DEFINE_MACRO(SW_ES, 0x0080);
DEFINE_MACRO(SW_SF, 0x0040);
DEFINE_MACRO(SW_PE, 0x0020);
DEFINE_MACRO(SW_UE, 0x0010);
DEFINE_MACRO(SW_OE, 0x0008);
DEFINE_MACRO(SW_ZE, 0x0004);
DEFINE_MACRO(SW_DE, 0x0002);
DEFINE_MACRO(SW_IE, 0x0001);
DEFINE_MACRO(X86_ROUND_CONTROL_MASK, 0x0C00);
DEFINE_MACRO(X86_PRECISION_CONTROL_MASK, 0x0300);
# undef DEFINE_MACRO
}
/*
#!/bin/sh
awk=awk
ifile="fpu_x86.h"
ofile="fpu_x86_asm.h"
if [ ! -r "$ifile" ]; then
echo "Error: could not open input file ($ifile)"
exit 1
fi
touch $ofile
if [ $? -ne 0 ]; then
echo "Error: could not open output file ($ofile)"
exit 1
fi
# header
cat > $ofile << EOF
// gb-- stupid hack to insert macros in the generated assembly file
static void fpu_emit_macro_definitions()
{
# define DEFINE_MACRO(name, value) \\
__asm__ __volatile__ (#name ## " = " #value)
EOF
# processing with awk
$awk '/#define/ { print " DEFINE_MACRO(" $2 ", " $3 ");"; }' $ifile >> $ofile
# footer
cat >> $ofile << EOF
# undef DEFINE_MACRO
}
EOF
# insert this script
echo "/""*" >> $ofile
cat $0 >> $ofile
echo "*""/" >> $ofile
exit 0
*/