1/*
 2 * IEEE754 floating point
 3 * double precision internal header file
 4 */
 5/*
 6 * MIPS floating point support
 7 * Copyright (C) 1994-2000 Algorithmics Ltd.
 8 *
 9 * ########################################################################
10 *
11 *  This program is free software; you can distribute it and/or modify it
12 *  under the terms of the GNU General Public License (Version 2) as
13 *  published by the Free Software Foundation.
14 *
15 *  This program is distributed in the hope it will be useful, but WITHOUT
16 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
18 *  for more details.
19 *
20 *  You should have received a copy of the GNU General Public License along
21 *  with this program; if not, write to the Free Software Foundation, Inc.,
22 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 *
24 * ########################################################################
25 */
26
 
27
28#include "ieee754int.h"
29
30#define assert(expr) ((void)0)
31
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
32/* 3bit extended double precision sticky right shift */
33#define XDPSRS(v,rs)	\
34  ((rs > (DP_MBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0))
35
36#define XDPSRSX1() \
37  (xe++, (xm = (xm >> 1) | (xm & 1)))
38
39#define XDPSRS1(v)	\
40  (((v) >> 1) | ((v) & 1))
 
 
 
41
42/* convert denormal to normalized with extended exponent */
43#define DPDNORMx(m,e) \
44  while( (m >> DP_MBITS) == 0) { m <<= 1; e--; }
45#define DPDNORMX	DPDNORMx(xm, xe)
46#define DPDNORMY	DPDNORMx(ym, ye)
 
47
48static inline ieee754dp builddp(int s, int bx, u64 m)
49{
50	ieee754dp r;
51
52	assert((s) == 0 || (s) == 1);
53	assert((bx) >= DP_EMIN - 1 + DP_EBIAS
54	       && (bx) <= DP_EMAX + 1 + DP_EBIAS);
55	assert(((m) >> DP_MBITS) == 0);
56
57	r.parts.sign = s;
58	r.parts.bexp = bx;
59	r.parts.mant = m;
60	return r;
61}
62
63extern int ieee754dp_isnan(ieee754dp);
64extern int ieee754dp_issnan(ieee754dp);
65extern int ieee754si_xcpt(int, const char *, ...);
66extern s64 ieee754di_xcpt(s64, const char *, ...);
67extern ieee754dp ieee754dp_xcpt(ieee754dp, const char *, ...);
68extern ieee754dp ieee754dp_nanxcpt(ieee754dp, const char *, ...);
69extern ieee754dp ieee754dp_bestnan(ieee754dp, ieee754dp);
70extern ieee754dp ieee754dp_format(int, int, u64);
71
72
73#define DPNORMRET2(s, e, m, name, a0, a1) \
74{ \
75    ieee754dp V = ieee754dp_format(s, e, m); \
76    if(TSTX()) \
77      return ieee754dp_xcpt(V, name, a0, a1); \
78    else \
79      return V; \
80}
81
82#define DPNORMRET1(s, e, m, name, a0)  DPNORMRET2(s, e, m, name, a0, a0)
 

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * IEEE754 floating point
 4 * double precision internal header file
 5 */
 6/*
 7 * MIPS floating point support
 8 * Copyright (C) 1994-2000 Algorithmics Ltd.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 9 */
10
11#include <linux/compiler.h>
12
13#include "ieee754int.h"
14
15#define assert(expr) ((void)0)
16
17#define DP_EBIAS	1023
18#define DP_EMIN		(-1022)
19#define DP_EMAX		1023
20#define DP_FBITS	52
21#define DP_MBITS	52
22
23#define DP_MBIT(x)	((u64)1 << (x))
24#define DP_HIDDEN_BIT	DP_MBIT(DP_FBITS)
25#define DP_SIGN_BIT	DP_MBIT(63)
26
27#define DPSIGN(dp)	(dp.sign)
28#define DPBEXP(dp)	(dp.bexp)
29#define DPMANT(dp)	(dp.mant)
30
31static inline int ieee754dp_finite(union ieee754dp x)
32{
33	return DPBEXP(x) != DP_EMAX + 1 + DP_EBIAS;
34}
35
36/* 3bit extended double precision sticky right shift */
37#define XDPSRS(v,rs)	\
38	((rs > (DP_FBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0))
39
40#define XDPSRSX1() \
41	(xe++, (xm = (xm >> 1) | (xm & 1)))
42
43#define XDPSRS1(v)	\
44	(((v) >> 1) | ((v) & 1))
45
46/* 32bit * 32bit => 64bit unsigned integer multiplication */
47#define DPXMULT(x, y)	((u64)(x) * (u64)y)
48
49/* convert denormal to normalized with extended exponent */
50#define DPDNORMx(m,e) \
51	while ((m >> DP_FBITS) == 0) { m <<= 1; e--; }
52#define DPDNORMX	DPDNORMx(xm, xe)
53#define DPDNORMY	DPDNORMx(ym, ye)
54#define DPDNORMZ	DPDNORMx(zm, ze)
55
56static inline union ieee754dp builddp(int s, int bx, u64 m)
57{
58	union ieee754dp r;
59
60	assert((s) == 0 || (s) == 1);
61	assert((bx) >= DP_EMIN - 1 + DP_EBIAS
62	       && (bx) <= DP_EMAX + 1 + DP_EBIAS);
63	assert(((m) >> DP_FBITS) == 0);
64
65	r.sign = s;
66	r.bexp = bx;
67	r.mant = m;
 
 
68
69	return r;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
70}
71
72extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp);
73extern union ieee754dp ieee754dp_format(int, int, u64);