mirror of
https://github.com/adulau/aha.git
synced 2024-12-29 12:16:20 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
582 lines
22 KiB
C
582 lines
22 KiB
C
/*
|
|
* Linux/PA-RISC Project (http://www.parisc-linux.org/)
|
|
*
|
|
* Floating-point emulation code
|
|
* Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
|
|
*
|
|
* 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, 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
|
|
*/
|
|
/*
|
|
* BEGIN_DESC
|
|
*
|
|
* File:
|
|
* @(#) pa/spmath/float.h $Revision: 1.1 $
|
|
*
|
|
* Purpose:
|
|
* <<please update with a synopis of the functionality provided by this file>>
|
|
*
|
|
* BE header: no
|
|
*
|
|
* Shipped: yes
|
|
* /usr/conf/pa/spmath/float.h
|
|
*
|
|
* END_DESC
|
|
*/
|
|
|
|
#ifdef __NO_PA_HDRS
|
|
PA header file -- do not include this header file for non-PA builds.
|
|
#endif
|
|
|
|
#include "fpbits.h"
|
|
#include "hppa.h"
|
|
/*
|
|
* Want to pick up the FPU capability flags, not the PDC structures.
|
|
* 'LOCORE' isn't really true in this case, but we don't want the C structures
|
|
* so it suits our purposes
|
|
*/
|
|
#define LOCORE
|
|
#include "fpu.h"
|
|
|
|
/*
|
|
* Declare the basic structures for the 3 different
|
|
* floating-point precisions.
|
|
*
|
|
* Single number
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |s| exp | mantissa |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
#define Sall(object) (object)
|
|
#define Ssign(object) Bitfield_extract( 0, 1,object)
|
|
#define Ssignedsign(object) Bitfield_signed_extract( 0, 1,object)
|
|
#define Sexponent(object) Bitfield_extract( 1, 8,object)
|
|
#define Smantissa(object) Bitfield_mask( 9, 23,object)
|
|
#define Ssignaling(object) Bitfield_extract( 9, 1,object)
|
|
#define Ssignalingnan(object) Bitfield_extract( 1, 9,object)
|
|
#define Shigh2mantissa(object) Bitfield_extract( 9, 2,object)
|
|
#define Sexponentmantissa(object) Bitfield_mask( 1, 31,object)
|
|
#define Ssignexponent(object) Bitfield_extract( 0, 9,object)
|
|
#define Shidden(object) Bitfield_extract( 8, 1,object)
|
|
#define Shiddenoverflow(object) Bitfield_extract( 7, 1,object)
|
|
#define Shiddenhigh7mantissa(object) Bitfield_extract( 8, 8,object)
|
|
#define Shiddenhigh3mantissa(object) Bitfield_extract( 8, 4,object)
|
|
#define Slow(object) Bitfield_mask( 31, 1,object)
|
|
#define Slow4(object) Bitfield_mask( 28, 4,object)
|
|
#define Slow31(object) Bitfield_mask( 1, 31,object)
|
|
#define Shigh31(object) Bitfield_extract( 0, 31,object)
|
|
#define Ssignedhigh31(object) Bitfield_signed_extract( 0, 31,object)
|
|
#define Shigh4(object) Bitfield_extract( 0, 4,object)
|
|
#define Sbit24(object) Bitfield_extract( 24, 1,object)
|
|
#define Sbit28(object) Bitfield_extract( 28, 1,object)
|
|
#define Sbit29(object) Bitfield_extract( 29, 1,object)
|
|
#define Sbit30(object) Bitfield_extract( 30, 1,object)
|
|
#define Sbit31(object) Bitfield_mask( 31, 1,object)
|
|
|
|
#define Deposit_ssign(object,value) Bitfield_deposit(value,0,1,object)
|
|
#define Deposit_sexponent(object,value) Bitfield_deposit(value,1,8,object)
|
|
#define Deposit_smantissa(object,value) Bitfield_deposit(value,9,23,object)
|
|
#define Deposit_shigh2mantissa(object,value) Bitfield_deposit(value,9,2,object)
|
|
#define Deposit_sexponentmantissa(object,value) \
|
|
Bitfield_deposit(value,1,31,object)
|
|
#define Deposit_ssignexponent(object,value) Bitfield_deposit(value,0,9,object)
|
|
#define Deposit_slow(object,value) Bitfield_deposit(value,31,1,object)
|
|
#define Deposit_shigh4(object,value) Bitfield_deposit(value,0,4,object)
|
|
|
|
#define Is_ssign(object) Bitfield_mask( 0, 1,object)
|
|
#define Is_ssignaling(object) Bitfield_mask( 9, 1,object)
|
|
#define Is_shidden(object) Bitfield_mask( 8, 1,object)
|
|
#define Is_shiddenoverflow(object) Bitfield_mask( 7, 1,object)
|
|
#define Is_slow(object) Bitfield_mask( 31, 1,object)
|
|
#define Is_sbit24(object) Bitfield_mask( 24, 1,object)
|
|
#define Is_sbit28(object) Bitfield_mask( 28, 1,object)
|
|
#define Is_sbit29(object) Bitfield_mask( 29, 1,object)
|
|
#define Is_sbit30(object) Bitfield_mask( 30, 1,object)
|
|
#define Is_sbit31(object) Bitfield_mask( 31, 1,object)
|
|
|
|
/*
|
|
* Double number.
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |s| exponent | mantissa part 1 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | mantissa part 2 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
#define Dallp1(object) (object)
|
|
#define Dsign(object) Bitfield_extract( 0, 1,object)
|
|
#define Dsignedsign(object) Bitfield_signed_extract( 0, 1,object)
|
|
#define Dexponent(object) Bitfield_extract( 1, 11,object)
|
|
#define Dmantissap1(object) Bitfield_mask( 12, 20,object)
|
|
#define Dsignaling(object) Bitfield_extract( 12, 1,object)
|
|
#define Dsignalingnan(object) Bitfield_extract( 1, 12,object)
|
|
#define Dhigh2mantissa(object) Bitfield_extract( 12, 2,object)
|
|
#define Dexponentmantissap1(object) Bitfield_mask( 1, 31,object)
|
|
#define Dsignexponent(object) Bitfield_extract( 0, 12,object)
|
|
#define Dhidden(object) Bitfield_extract( 11, 1,object)
|
|
#define Dhiddenoverflow(object) Bitfield_extract( 10, 1,object)
|
|
#define Dhiddenhigh7mantissa(object) Bitfield_extract( 11, 8,object)
|
|
#define Dhiddenhigh3mantissa(object) Bitfield_extract( 11, 4,object)
|
|
#define Dlowp1(object) Bitfield_mask( 31, 1,object)
|
|
#define Dlow31p1(object) Bitfield_mask( 1, 31,object)
|
|
#define Dhighp1(object) Bitfield_extract( 0, 1,object)
|
|
#define Dhigh4p1(object) Bitfield_extract( 0, 4,object)
|
|
#define Dhigh31p1(object) Bitfield_extract( 0, 31,object)
|
|
#define Dsignedhigh31p1(object) Bitfield_signed_extract( 0, 31,object)
|
|
#define Dbit3p1(object) Bitfield_extract( 3, 1,object)
|
|
|
|
#define Deposit_dsign(object,value) Bitfield_deposit(value,0,1,object)
|
|
#define Deposit_dexponent(object,value) Bitfield_deposit(value,1,11,object)
|
|
#define Deposit_dmantissap1(object,value) Bitfield_deposit(value,12,20,object)
|
|
#define Deposit_dhigh2mantissa(object,value) Bitfield_deposit(value,12,2,object)
|
|
#define Deposit_dexponentmantissap1(object,value) \
|
|
Bitfield_deposit(value,1,31,object)
|
|
#define Deposit_dsignexponent(object,value) Bitfield_deposit(value,0,12,object)
|
|
#define Deposit_dlowp1(object,value) Bitfield_deposit(value,31,1,object)
|
|
#define Deposit_dhigh4p1(object,value) Bitfield_deposit(value,0,4,object)
|
|
|
|
#define Is_dsign(object) Bitfield_mask( 0, 1,object)
|
|
#define Is_dsignaling(object) Bitfield_mask( 12, 1,object)
|
|
#define Is_dhidden(object) Bitfield_mask( 11, 1,object)
|
|
#define Is_dhiddenoverflow(object) Bitfield_mask( 10, 1,object)
|
|
#define Is_dlowp1(object) Bitfield_mask( 31, 1,object)
|
|
#define Is_dhighp1(object) Bitfield_mask( 0, 1,object)
|
|
#define Is_dbit3p1(object) Bitfield_mask( 3, 1,object)
|
|
|
|
#define Dallp2(object) (object)
|
|
#define Dmantissap2(object) (object)
|
|
#define Dlowp2(object) Bitfield_mask( 31, 1,object)
|
|
#define Dlow4p2(object) Bitfield_mask( 28, 4,object)
|
|
#define Dlow31p2(object) Bitfield_mask( 1, 31,object)
|
|
#define Dhighp2(object) Bitfield_extract( 0, 1,object)
|
|
#define Dhigh31p2(object) Bitfield_extract( 0, 31,object)
|
|
#define Dbit2p2(object) Bitfield_extract( 2, 1,object)
|
|
#define Dbit3p2(object) Bitfield_extract( 3, 1,object)
|
|
#define Dbit21p2(object) Bitfield_extract( 21, 1,object)
|
|
#define Dbit28p2(object) Bitfield_extract( 28, 1,object)
|
|
#define Dbit29p2(object) Bitfield_extract( 29, 1,object)
|
|
#define Dbit30p2(object) Bitfield_extract( 30, 1,object)
|
|
#define Dbit31p2(object) Bitfield_mask( 31, 1,object)
|
|
|
|
#define Deposit_dlowp2(object,value) Bitfield_deposit(value,31,1,object)
|
|
|
|
#define Is_dlowp2(object) Bitfield_mask( 31, 1,object)
|
|
#define Is_dhighp2(object) Bitfield_mask( 0, 1,object)
|
|
#define Is_dbit2p2(object) Bitfield_mask( 2, 1,object)
|
|
#define Is_dbit3p2(object) Bitfield_mask( 3, 1,object)
|
|
#define Is_dbit21p2(object) Bitfield_mask( 21, 1,object)
|
|
#define Is_dbit28p2(object) Bitfield_mask( 28, 1,object)
|
|
#define Is_dbit29p2(object) Bitfield_mask( 29, 1,object)
|
|
#define Is_dbit30p2(object) Bitfield_mask( 30, 1,object)
|
|
#define Is_dbit31p2(object) Bitfield_mask( 31, 1,object)
|
|
|
|
/*
|
|
* Quad number.
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |s| exponent | mantissa part 1 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | mantissa part 2 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | mantissa part 3 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | mantissa part 4 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
typedef struct
|
|
{
|
|
union
|
|
{
|
|
struct { unsigned qallp1; } u_qallp1;
|
|
/* Not needed for now...
|
|
Bitfield_extract( 0, 1,u_qsign,qsign)
|
|
Bitfield_signed_extract( 0, 1,u_qsignedsign,qsignedsign)
|
|
Bitfield_extract( 1, 15,u_qexponent,qexponent)
|
|
Bitfield_extract(16, 16,u_qmantissap1,qmantissap1)
|
|
Bitfield_extract(16, 1,u_qsignaling,qsignaling)
|
|
Bitfield_extract(1, 16,u_qsignalingnan,qsignalingnan)
|
|
Bitfield_extract(16, 2,u_qhigh2mantissa,qhigh2mantissa)
|
|
Bitfield_extract( 1, 31,u_qexponentmantissap1,qexponentmantissap1)
|
|
Bitfield_extract( 0, 16,u_qsignexponent,qsignexponent)
|
|
Bitfield_extract(15, 1,u_qhidden,qhidden)
|
|
Bitfield_extract(14, 1,u_qhiddenoverflow,qhiddenoverflow)
|
|
Bitfield_extract(15, 8,u_qhiddenhigh7mantissa,qhiddenhigh7mantissa)
|
|
Bitfield_extract(15, 4,u_qhiddenhigh3mantissa,qhiddenhigh3mantissa)
|
|
Bitfield_extract(31, 1,u_qlowp1,qlowp1)
|
|
Bitfield_extract( 1, 31,u_qlow31p1,qlow31p1)
|
|
Bitfield_extract( 0, 1,u_qhighp1,qhighp1)
|
|
Bitfield_extract( 0, 4,u_qhigh4p1,qhigh4p1)
|
|
Bitfield_extract( 0, 31,u_qhigh31p1,qhigh31p1)
|
|
*/
|
|
} quad_u1;
|
|
union
|
|
{
|
|
struct { unsigned qallp2; } u_qallp2;
|
|
/* Not needed for now...
|
|
Bitfield_extract(31, 1,u_qlowp2,qlowp2)
|
|
Bitfield_extract( 1, 31,u_qlow31p2,qlow31p2)
|
|
Bitfield_extract( 0, 1,u_qhighp2,qhighp2)
|
|
Bitfield_extract( 0, 31,u_qhigh31p2,qhigh31p2)
|
|
*/
|
|
} quad_u2;
|
|
union
|
|
{
|
|
struct { unsigned qallp3; } u_qallp3;
|
|
/* Not needed for now...
|
|
Bitfield_extract(31, 1,u_qlowp3,qlowp3)
|
|
Bitfield_extract( 1, 31,u_qlow31p3,qlow31p3)
|
|
Bitfield_extract( 0, 1,u_qhighp3,qhighp3)
|
|
Bitfield_extract( 0, 31,u_qhigh31p3,qhigh31p3)
|
|
*/
|
|
} quad_u3;
|
|
union
|
|
{
|
|
struct { unsigned qallp4; } u_qallp4;
|
|
/* Not need for now...
|
|
Bitfield_extract(31, 1,u_qlowp4,qlowp4)
|
|
Bitfield_extract( 1, 31,u_qlow31p4,qlow31p4)
|
|
Bitfield_extract( 0, 1,u_qhighp4,qhighp4)
|
|
Bitfield_extract( 0, 31,u_qhigh31p4,qhigh31p4)
|
|
*/
|
|
} quad_u4;
|
|
} quad_floating_point;
|
|
|
|
/* Extension - An additional structure to hold the guard, round and
|
|
* sticky bits during computations.
|
|
*/
|
|
#define Extall(object) (object)
|
|
#define Extsign(object) Bitfield_extract( 0, 1,object)
|
|
#define Exthigh31(object) Bitfield_extract( 0, 31,object)
|
|
#define Extlow31(object) Bitfield_extract( 1, 31,object)
|
|
#define Extlow(object) Bitfield_extract( 31, 1,object)
|
|
|
|
/*
|
|
* Single extended - The upper word is just like single precision,
|
|
* but one additional word of mantissa is needed.
|
|
*/
|
|
#define Sextallp1(object) (object)
|
|
#define Sextallp2(object) (object)
|
|
#define Sextlowp1(object) Bitfield_extract( 31, 1,object)
|
|
#define Sexthighp2(object) Bitfield_extract( 0, 1,object)
|
|
#define Sextlow31p2(object) Bitfield_extract( 1, 31,object)
|
|
#define Sexthiddenoverflow(object) Bitfield_extract( 4, 1,object)
|
|
#define Is_sexthiddenoverflow(object) Bitfield_mask( 4, 1,object)
|
|
|
|
/*
|
|
* Double extended - The upper two words are just like double precision,
|
|
* but two additional words of mantissa are needed.
|
|
*/
|
|
#define Dextallp1(object) (object)
|
|
#define Dextallp2(object) (object)
|
|
#define Dextallp3(object) (object)
|
|
#define Dextallp4(object) (object)
|
|
#define Dextlowp2(object) Bitfield_extract( 31, 1,object)
|
|
#define Dexthighp3(object) Bitfield_extract( 0, 1,object)
|
|
#define Dextlow31p3(object) Bitfield_extract( 1, 31,object)
|
|
#define Dexthiddenoverflow(object) Bitfield_extract( 10, 1,object)
|
|
#define Is_dexthiddenoverflow(object) Bitfield_mask( 10, 1,object)
|
|
#define Deposit_dextlowp4(object,value) Bitfield_deposit(value,31,1,object)
|
|
|
|
/*
|
|
* Declare the basic structures for the 3 different
|
|
* fixed-point precisions.
|
|
*
|
|
* Single number
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |s| integer |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
typedef int sgl_integer;
|
|
|
|
/*
|
|
* Double number.
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |s| high integer |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | low integer |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
struct dint {
|
|
int wd0;
|
|
unsigned int wd1;
|
|
};
|
|
|
|
struct dblwd {
|
|
unsigned int wd0;
|
|
unsigned int wd1;
|
|
};
|
|
|
|
/*
|
|
* Quad number.
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |s| integer part1 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | integer part 2 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | integer part 3 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | integer part 4 |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
|
|
struct quadwd {
|
|
int wd0;
|
|
unsigned int wd1;
|
|
unsigned int wd2;
|
|
unsigned int wd3;
|
|
};
|
|
|
|
typedef struct quadwd quad_integer;
|
|
|
|
|
|
/* useful typedefs */
|
|
typedef unsigned int sgl_floating_point;
|
|
typedef struct dblwd dbl_floating_point;
|
|
typedef struct dint dbl_integer;
|
|
typedef struct dblwd dbl_unsigned;
|
|
|
|
/*
|
|
* Define the different precisions' parameters.
|
|
*/
|
|
#define SGL_BITLENGTH 32
|
|
#define SGL_EMAX 127
|
|
#define SGL_EMIN (-126)
|
|
#define SGL_BIAS 127
|
|
#define SGL_WRAP 192
|
|
#define SGL_INFINITY_EXPONENT (SGL_EMAX+SGL_BIAS+1)
|
|
#define SGL_THRESHOLD 32
|
|
#define SGL_EXP_LENGTH 8
|
|
#define SGL_P 24
|
|
|
|
#define DBL_BITLENGTH 64
|
|
#define DBL_EMAX 1023
|
|
#define DBL_EMIN (-1022)
|
|
#define DBL_BIAS 1023
|
|
#define DBL_WRAP 1536
|
|
#define DBL_INFINITY_EXPONENT (DBL_EMAX+DBL_BIAS+1)
|
|
#define DBL_THRESHOLD 64
|
|
#define DBL_EXP_LENGTH 11
|
|
#define DBL_P 53
|
|
|
|
#define QUAD_BITLENGTH 128
|
|
#define QUAD_EMAX 16383
|
|
#define QUAD_EMIN (-16382)
|
|
#define QUAD_BIAS 16383
|
|
#define QUAD_WRAP 24576
|
|
#define QUAD_INFINITY_EXPONENT (QUAD_EMAX+QUAD_BIAS+1)
|
|
#define QUAD_P 113
|
|
|
|
/* Boolean Values etc. */
|
|
#define FALSE 0
|
|
#define TRUE (!FALSE)
|
|
#define NOT !
|
|
#define XOR ^
|
|
|
|
/* other constants */
|
|
#undef NULL
|
|
#define NULL 0
|
|
#define NIL 0
|
|
#define SGL 0
|
|
#define DBL 1
|
|
#define BADFMT 2
|
|
#define QUAD 3
|
|
|
|
|
|
/* Types */
|
|
typedef int boolean;
|
|
typedef int FORMAT;
|
|
typedef int VOID;
|
|
|
|
|
|
/* Declare status register equivalent to FPUs architecture.
|
|
*
|
|
* 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |V|Z|O|U|I|C| rsv | model | version |RM |rsv|T|r|V|Z|O|U|I|
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
#define Cbit(object) Bitfield_extract( 5, 1,object)
|
|
#define Tbit(object) Bitfield_extract( 25, 1,object)
|
|
#define Roundingmode(object) Bitfield_extract( 21, 2,object)
|
|
#define Invalidtrap(object) Bitfield_extract( 27, 1,object)
|
|
#define Divisionbyzerotrap(object) Bitfield_extract( 28, 1,object)
|
|
#define Overflowtrap(object) Bitfield_extract( 29, 1,object)
|
|
#define Underflowtrap(object) Bitfield_extract( 30, 1,object)
|
|
#define Inexacttrap(object) Bitfield_extract( 31, 1,object)
|
|
#define Invalidflag(object) Bitfield_extract( 0, 1,object)
|
|
#define Divisionbyzeroflag(object) Bitfield_extract( 1, 1,object)
|
|
#define Overflowflag(object) Bitfield_extract( 2, 1,object)
|
|
#define Underflowflag(object) Bitfield_extract( 3, 1,object)
|
|
#define Inexactflag(object) Bitfield_extract( 4, 1,object)
|
|
#define Allflags(object) Bitfield_extract( 0, 5,object)
|
|
|
|
/* Definitions relevant to the status register */
|
|
|
|
/* Rounding Modes */
|
|
#define ROUNDNEAREST 0
|
|
#define ROUNDZERO 1
|
|
#define ROUNDPLUS 2
|
|
#define ROUNDMINUS 3
|
|
|
|
/* Exceptions */
|
|
#define NOEXCEPTION 0x0
|
|
#define INVALIDEXCEPTION 0x20
|
|
#define DIVISIONBYZEROEXCEPTION 0x10
|
|
#define OVERFLOWEXCEPTION 0x08
|
|
#define UNDERFLOWEXCEPTION 0x04
|
|
#define INEXACTEXCEPTION 0x02
|
|
#define UNIMPLEMENTEDEXCEPTION 0x01
|
|
|
|
/* New exceptions for the 2E Opcode */
|
|
#define OPC_2E_INVALIDEXCEPTION 0x30
|
|
#define OPC_2E_OVERFLOWEXCEPTION 0x18
|
|
#define OPC_2E_UNDERFLOWEXCEPTION 0x0c
|
|
#define OPC_2E_INEXACTEXCEPTION 0x12
|
|
|
|
/* Declare exception registers equivalent to FPUs architecture
|
|
*
|
|
* 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* |excepttype | r1 | r2/ext | operation |parm |n| t/cond |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
#define Allexception(object) (object)
|
|
#define Exceptiontype(object) Bitfield_extract( 0, 6,object)
|
|
#define Instructionfield(object) Bitfield_mask( 6,26,object)
|
|
#define Parmfield(object) Bitfield_extract( 23, 3,object)
|
|
#define Rabit(object) Bitfield_extract( 24, 1,object)
|
|
#define Ibit(object) Bitfield_extract( 25, 1,object)
|
|
|
|
#define Set_exceptiontype(object,value) Bitfield_deposit(value, 0, 6,object)
|
|
#define Set_parmfield(object,value) Bitfield_deposit(value, 23, 3,object)
|
|
#define Set_exceptiontype_and_instr_field(exception,instruction,object) \
|
|
object = exception << 26 | instruction
|
|
|
|
/* Declare the condition field
|
|
*
|
|
* 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* | |G|L|E|U|X|
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*/
|
|
#define Allexception(object) (object)
|
|
#define Greaterthanbit(object) Bitfield_extract( 27, 1,object)
|
|
#define Lessthanbit(object) Bitfield_extract( 28, 1,object)
|
|
#define Equalbit(object) Bitfield_extract( 29, 1,object)
|
|
#define Unorderedbit(object) Bitfield_extract( 30, 1,object)
|
|
#define Exceptionbit(object) Bitfield_extract( 31, 1,object)
|
|
|
|
/* An alias name for the status register */
|
|
#define Fpustatus_register (*status)
|
|
|
|
/**************************************************
|
|
* Status register referencing and manipulation. *
|
|
**************************************************/
|
|
|
|
/* Rounding mode */
|
|
#define Rounding_mode() Roundingmode(Fpustatus_register)
|
|
#define Is_rounding_mode(rmode) \
|
|
(Roundingmode(Fpustatus_register) == rmode)
|
|
#define Set_rounding_mode(value) \
|
|
Bitfield_deposit(value,21,2,Fpustatus_register)
|
|
|
|
/* Boolean testing of the trap enable bits */
|
|
#define Is_invalidtrap_enabled() Invalidtrap(Fpustatus_register)
|
|
#define Is_divisionbyzerotrap_enabled() Divisionbyzerotrap(Fpustatus_register)
|
|
#define Is_overflowtrap_enabled() Overflowtrap(Fpustatus_register)
|
|
#define Is_underflowtrap_enabled() Underflowtrap(Fpustatus_register)
|
|
#define Is_inexacttrap_enabled() Inexacttrap(Fpustatus_register)
|
|
|
|
/* Set the indicated flags in the status register */
|
|
#define Set_invalidflag() Bitfield_deposit(1,0,1,Fpustatus_register)
|
|
#define Set_divisionbyzeroflag() Bitfield_deposit(1,1,1,Fpustatus_register)
|
|
#define Set_overflowflag() Bitfield_deposit(1,2,1,Fpustatus_register)
|
|
#define Set_underflowflag() Bitfield_deposit(1,3,1,Fpustatus_register)
|
|
#define Set_inexactflag() Bitfield_deposit(1,4,1,Fpustatus_register)
|
|
|
|
#define Clear_all_flags() Bitfield_deposit(0,0,5,Fpustatus_register)
|
|
|
|
/* Manipulate the trap and condition code bits (tbit and cbit) */
|
|
#define Set_tbit() Bitfield_deposit(1,25,1,Fpustatus_register)
|
|
#define Clear_tbit() Bitfield_deposit(0,25,1,Fpustatus_register)
|
|
#define Is_tbit_set() Tbit(Fpustatus_register)
|
|
#define Is_cbit_set() Cbit(Fpustatus_register)
|
|
|
|
#define Set_status_cbit(value) \
|
|
Bitfield_deposit(value,5,1,Fpustatus_register)
|
|
|
|
/*******************************
|
|
* Condition field referencing *
|
|
*******************************/
|
|
#define Unordered(cond) Unorderedbit(cond)
|
|
#define Equal(cond) Equalbit(cond)
|
|
#define Lessthan(cond) Lessthanbit(cond)
|
|
#define Greaterthan(cond) Greaterthanbit(cond)
|
|
#define Exception(cond) Exceptionbit(cond)
|
|
|
|
|
|
/* Defines for the extension */
|
|
#define Ext_isone_sign(extent) (Extsign(extent))
|
|
#define Ext_isnotzero(extent) \
|
|
(Extall(extent))
|
|
#define Ext_isnotzero_lower(extent) \
|
|
(Extlow31(extent))
|
|
#define Ext_leftshiftby1(extent) \
|
|
Extall(extent) <<= 1
|
|
#define Ext_negate(extent) \
|
|
(int )Extall(extent) = 0 - (int )Extall(extent)
|
|
#define Ext_setone_low(extent) Bitfield_deposit(1,31,1,extent)
|
|
#define Ext_setzero(extent) Extall(extent) = 0
|
|
|
|
typedef int operation;
|
|
|
|
/* error messages */
|
|
|
|
#define NONE 0
|
|
#define UNDEFFPINST 1
|
|
|
|
/* Function definitions: opcode, opclass */
|
|
#define FTEST (1<<2) | 0
|
|
#define FCPY (2<<2) | 0
|
|
#define FABS (3<<2) | 0
|
|
#define FSQRT (4<<2) | 0
|
|
#define FRND (5<<2) | 0
|
|
|
|
#define FCNVFF (0<<2) | 1
|
|
#define FCNVXF (1<<2) | 1
|
|
#define FCNVFX (2<<2) | 1
|
|
#define FCNVFXT (3<<2) | 1
|
|
|
|
#define FCMP (0<<2) | 2
|
|
|
|
#define FADD (0<<2) | 3
|
|
#define FSUB (1<<2) | 3
|
|
#define FMPY (2<<2) | 3
|
|
#define FDIV (3<<2) | 3
|
|
#define FREM (4<<2) | 3
|
|
|