/* real.c - implementation of REAL_ARITHMETIC, REAL_VALUE_ATOF,
and support for XFmode IEEE extended real floating point arithmetic.
- Copyright (C) 1993, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000 Free Software Foundation, Inc.
Contributed by Stephen L. Moshier (moshier@world.std.com).
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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.
+GCC 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.
-GNU CC 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.
+GCC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "config.h"
#include "system.h"
#include "tree.h"
#include "toplev.h"
+#include "tm_p.h"
/* To enable support of XFmode extended real floating point, define
LONG_DOUBLE_TYPE_SIZE 96 in the tm.h file (m68k.h or i386.h).
point arithmetic tester, modified for this purpose, can be found on
usc.edu: /pub/C-numanal/ieeetest.zoo. Other tests, and libraries of
XFmode and TFmode transcendental functions, can be obtained by ftp from
-netlib.att.com: netlib/cephes. */
+netlib.att.com: netlib/cephes. */
\f
/* Type of computer arithmetic.
- Only one of DEC, IBM, IEEE, or UNK should get defined.
+ Only one of DEC, IBM, IEEE, C4X, or UNK should get defined.
`IEEE', when REAL_WORDS_BIG_ENDIAN is non-zero, refers generically
to big-endian IEEE floating-point data structure. This definition
no type wider than DFmode. The IBM conversions were contributed by
frank@atom.ansto.gov.au (Frank Crawford).
+ `C4X' refers specifically to the floating point format used on
+ Texas Instruments TMS320C3x and TMS320C4x digital signal
+ processors. This supports QFmode (32-bit float, double) and HFmode
+ (40-bit long double) where BITS_PER_BYTE is 32. Unlike IEEE
+ floats, C4x floats are not rounded to be even. The C4x conversions
+ were contributed by m.hayes@elec.canterbury.ac.nz (Michael Hayes) and
+ Haj.Ten.Brugge@net.HCC.nl (Herman ten Brugge).
+
If LONG_DOUBLE_TYPE_SIZE = 64 (the default, unless tm.h defines it)
then `long double' and `double' are both implemented, but they
both mean DFmode. In this case, the software floating-point
support available here is activated by writing
#define REAL_ARITHMETIC
- in tm.h.
+ in tm.h.
The case LONG_DOUBLE_TYPE_SIZE = 128 activates TFmode support
and may deactivate XFmode since `long double' is used to refer
- to both modes.
+ to both modes. Defining INTEL_EXTENDED_IEEE_FORMAT to non-zero
+ at the same time enables 80387-style 80-bit floats in a 128-bit
+ padded image, as seen on IA-64.
The macros FLOAT_WORDS_BIG_ENDIAN, HOST_FLOAT_WORDS_BIG_ENDIAN,
contributed by Richard Earnshaw <Richard.Earnshaw@cl.cam.ac.uk>,
These optional macros may be defined in tm.h. In real.h, they
default to WORDS_BIG_ENDIAN, etc., so there is no need to define
them for any normal host or target machine on which the floats
- and the integers have the same endian-ness. */
+ and the integers have the same endian-ness. */
/* The following converts gcc macros into the ones used by this file. */
#endif
#endif
+/* If no 16-bit type has been found and the compiler is GCC, try HImode. */
+#if defined(__GNUC__) && EMUSHORT_SIZE != 16
+typedef int HItype __attribute__ ((mode (HI)));
+typedef unsigned int UHItype __attribute__ ((mode (HI)));
+#undef EMUSHORT
+#undef EMUSHORT_SIZE
+#undef EMULONG_SIZE
+#define EMUSHORT HItype
+#define UEMUSHORT UHItype
+#define EMUSHORT_SIZE 16
+#define EMULONG_SIZE 32
+#else
+#define UEMUSHORT unsigned EMUSHORT
+#endif
+
#if HOST_BITS_PER_SHORT >= EMULONG_SIZE
#define EMULONG short
#else
A REAL_VALUE_TYPE is guaranteed to occupy contiguous locations
in memory, with no holes. */
-#if LONG_DOUBLE_TYPE_SIZE == 96
+#if MAX_LONG_DOUBLE_TYPE_SIZE == 96 || \
+ ((INTEL_EXTENDED_IEEE_FORMAT != 0) && MAX_LONG_DOUBLE_TYPE_SIZE == 128)
/* Number of 16 bit words in external e type format */
-#define NE 6
-#define MAXDECEXP 4932
-#define MINDECEXP -4956
-#define GET_REAL(r,e) bcopy ((char *) r, (char *) e, 2*NE)
-#define PUT_REAL(e,r) bcopy ((char *) e, (char *) r, 2*NE)
-#else /* no XFmode */
-#if LONG_DOUBLE_TYPE_SIZE == 128
-#define NE 10
-#define MAXDECEXP 4932
-#define MINDECEXP -4977
-#define GET_REAL(r,e) bcopy ((char *) r, (char *) e, 2*NE)
-#define PUT_REAL(e,r) bcopy ((char *) e, (char *) r, 2*NE)
+# define NE 6
+# define MAXDECEXP 4932
+# define MINDECEXP -4956
+# define GET_REAL(r,e) memcpy ((char *)(e), (char *)(r), 2*NE)
+# define PUT_REAL(e,r) \
+ do { \
+ memcpy ((char *)(r), (char *)(e), 2*NE); \
+ if (2*NE < sizeof(*r)) \
+ memset ((char *)(r) + 2*NE, 0, sizeof(*r) - 2*NE); \
+ } while (0)
+# else /* no XFmode */
+# if MAX_LONG_DOUBLE_TYPE_SIZE == 128
+# define NE 10
+# define MAXDECEXP 4932
+# define MINDECEXP -4977
+# define GET_REAL(r,e) memcpy ((char *)(e), (char *)(r), 2*NE)
+# define PUT_REAL(e,r) \
+ do { \
+ memcpy ((char *)(r), (char *)(e), 2*NE); \
+ if (2*NE < sizeof(*r)) \
+ memset ((char *)(r) + 2*NE, 0, sizeof(*r) - 2*NE); \
+ } while (0)
#else
#define NE 6
#define MAXDECEXP 4932
/* Emulator uses target format internally
but host stores it in host endian-ness. */
-#define GET_REAL(r,e) \
-do { \
- if (HOST_FLOAT_WORDS_BIG_ENDIAN == REAL_WORDS_BIG_ENDIAN) \
- e53toe ((unsigned EMUSHORT *) (r), (e)); \
- else \
- { \
- unsigned EMUSHORT w[4]; \
- w[3] = ((EMUSHORT *) r)[0]; \
- w[2] = ((EMUSHORT *) r)[1]; \
- w[1] = ((EMUSHORT *) r)[2]; \
- w[0] = ((EMUSHORT *) r)[3]; \
- e53toe (w, (e)); \
- } \
+#define GET_REAL(r,e) \
+do { \
+ if (HOST_FLOAT_WORDS_BIG_ENDIAN == REAL_WORDS_BIG_ENDIAN) \
+ e53toe ((UEMUSHORT *) (r), (e)); \
+ else \
+ { \
+ UEMUSHORT w[4]; \
+ memcpy (&w[3], ((EMUSHORT *) r), sizeof (EMUSHORT)); \
+ memcpy (&w[2], ((EMUSHORT *) r) + 1, sizeof (EMUSHORT)); \
+ memcpy (&w[1], ((EMUSHORT *) r) + 2, sizeof (EMUSHORT)); \
+ memcpy (&w[0], ((EMUSHORT *) r) + 3, sizeof (EMUSHORT)); \
+ e53toe (w, (e)); \
+ } \
} while (0)
-#define PUT_REAL(e,r) \
-do { \
- if (HOST_FLOAT_WORDS_BIG_ENDIAN == REAL_WORDS_BIG_ENDIAN) \
- etoe53 ((e), (unsigned EMUSHORT *) (r)); \
- else \
- { \
- unsigned EMUSHORT w[4]; \
- etoe53 ((e), w); \
- *((EMUSHORT *) r) = w[3]; \
- *((EMUSHORT *) r + 1) = w[2]; \
- *((EMUSHORT *) r + 2) = w[1]; \
- *((EMUSHORT *) r + 3) = w[0]; \
- } \
+#define PUT_REAL(e,r) \
+do { \
+ if (HOST_FLOAT_WORDS_BIG_ENDIAN == REAL_WORDS_BIG_ENDIAN) \
+ etoe53 ((e), (UEMUSHORT *) (r)); \
+ else \
+ { \
+ UEMUSHORT w[4]; \
+ etoe53 ((e), w); \
+ memcpy (((EMUSHORT *) r), &w[3], sizeof (EMUSHORT)); \
+ memcpy (((EMUSHORT *) r) + 1, &w[2], sizeof (EMUSHORT)); \
+ memcpy (((EMUSHORT *) r) + 2, &w[1], sizeof (EMUSHORT)); \
+ memcpy (((EMUSHORT *) r) + 3, &w[0], sizeof (EMUSHORT)); \
+ } \
} while (0)
#else /* not REAL_ARITHMETIC */
/* emulator uses host format */
-#define GET_REAL(r,e) e53toe ((unsigned EMUSHORT *) (r), (e))
-#define PUT_REAL(e,r) etoe53 ((e), (unsigned EMUSHORT *) (r))
+#define GET_REAL(r,e) e53toe ((UEMUSHORT *) (r), (e))
+#define PUT_REAL(e,r) etoe53 ((e), (UEMUSHORT *) (r))
#endif /* not REAL_ARITHMETIC */
#endif /* not TFmode */
/* The exponent of 1.0 */
#define EXONE (0x3fff)
+#if defined(HOST_EBCDIC)
+/* bit 8 is significant in EBCDIC */
+#define CHARMASK 0xff
+#else
+#define CHARMASK 0x7f
+#endif
+
extern int extra_warnings;
-extern unsigned EMUSHORT ezero[], ehalf[], eone[], etwo[];
-extern unsigned EMUSHORT elog2[], esqrt2[];
+extern UEMUSHORT ezero[], ehalf[], eone[], etwo[];
+extern UEMUSHORT elog2[], esqrt2[];
-static void endian PROTO((unsigned EMUSHORT *, long *,
+static void endian PARAMS ((UEMUSHORT *, long *,
enum machine_mode));
-static void eclear PROTO((unsigned EMUSHORT *));
-static void emov PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
+static void eclear PARAMS ((UEMUSHORT *));
+static void emov PARAMS ((UEMUSHORT *, UEMUSHORT *));
#if 0
-static void eabs PROTO((unsigned EMUSHORT *));
-#endif
-static void eneg PROTO((unsigned EMUSHORT *));
-static int eisneg PROTO((unsigned EMUSHORT *));
-static int eisinf PROTO((unsigned EMUSHORT *));
-static int eisnan PROTO((unsigned EMUSHORT *));
-static void einfin PROTO((unsigned EMUSHORT *));
-static void enan PROTO((unsigned EMUSHORT *, int));
-static void emovi PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void emovo PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void ecleaz PROTO((unsigned EMUSHORT *));
-static void ecleazs PROTO((unsigned EMUSHORT *));
-static void emovz PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void einan PROTO((unsigned EMUSHORT *));
-static int eiisnan PROTO((unsigned EMUSHORT *));
-static int eiisneg PROTO((unsigned EMUSHORT *));
+static void eabs PARAMS ((UEMUSHORT *));
+#endif
+static void eneg PARAMS ((UEMUSHORT *));
+static int eisneg PARAMS ((UEMUSHORT *));
+static int eisinf PARAMS ((UEMUSHORT *));
+static int eisnan PARAMS ((UEMUSHORT *));
+static void einfin PARAMS ((UEMUSHORT *));
+#ifdef NANS
+static void enan PARAMS ((UEMUSHORT *, int));
+static void einan PARAMS ((UEMUSHORT *));
+static int eiisnan PARAMS ((UEMUSHORT *));
+static int eiisneg PARAMS ((UEMUSHORT *));
+static void make_nan PARAMS ((UEMUSHORT *, int, enum machine_mode));
+#endif
+static void emovi PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void emovo PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void ecleaz PARAMS ((UEMUSHORT *));
+static void ecleazs PARAMS ((UEMUSHORT *));
+static void emovz PARAMS ((UEMUSHORT *, UEMUSHORT *));
#if 0
-static void eiinfin PROTO((unsigned EMUSHORT *));
-#endif
-static int eiisinf PROTO((unsigned EMUSHORT *));
-static int ecmpm PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void eshdn1 PROTO((unsigned EMUSHORT *));
-static void eshup1 PROTO((unsigned EMUSHORT *));
-static void eshdn8 PROTO((unsigned EMUSHORT *));
-static void eshup8 PROTO((unsigned EMUSHORT *));
-static void eshup6 PROTO((unsigned EMUSHORT *));
-static void eshdn6 PROTO((unsigned EMUSHORT *));
-static void eaddm PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));\f
-static void esubm PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void m16m PROTO((unsigned int, unsigned short *,
- unsigned short *));
-static int edivm PROTO((unsigned short *, unsigned short *));
-static int emulm PROTO((unsigned short *, unsigned short *));
-static void emdnorm PROTO((unsigned EMUSHORT *, int, int, EMULONG, int));
-static void esub PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
- unsigned EMUSHORT *));
-static void eadd PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
- unsigned EMUSHORT *));
-static void eadd1 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
- unsigned EMUSHORT *));
-static void ediv PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
- unsigned EMUSHORT *));
-static void emul PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
- unsigned EMUSHORT *));
-static void e53toe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void e64toe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void e113toe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void e24toe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etoe113 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void toe113 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etoe64 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void toe64 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etoe53 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void toe53 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etoe24 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void toe24 PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static int ecmp PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
+static void eiinfin PARAMS ((UEMUSHORT *));
+#endif
+#ifdef INFINITY
+static int eiisinf PARAMS ((UEMUSHORT *));
+#endif
+static int ecmpm PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void eshdn1 PARAMS ((UEMUSHORT *));
+static void eshup1 PARAMS ((UEMUSHORT *));
+static void eshdn8 PARAMS ((UEMUSHORT *));
+static void eshup8 PARAMS ((UEMUSHORT *));
+static void eshup6 PARAMS ((UEMUSHORT *));
+static void eshdn6 PARAMS ((UEMUSHORT *));
+static void eaddm PARAMS ((UEMUSHORT *, UEMUSHORT *));\f
+static void esubm PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void m16m PARAMS ((unsigned int, UEMUSHORT *, UEMUSHORT *));
+static int edivm PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static int emulm PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void emdnorm PARAMS ((UEMUSHORT *, int, int, EMULONG, int));
+static void esub PARAMS ((UEMUSHORT *, UEMUSHORT *,
+ UEMUSHORT *));
+static void eadd PARAMS ((UEMUSHORT *, UEMUSHORT *,
+ UEMUSHORT *));
+static void eadd1 PARAMS ((UEMUSHORT *, UEMUSHORT *,
+ UEMUSHORT *));
+static void ediv PARAMS ((UEMUSHORT *, UEMUSHORT *,
+ UEMUSHORT *));
+static void emul PARAMS ((UEMUSHORT *, UEMUSHORT *,
+ UEMUSHORT *));
+static void e53toe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void e64toe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
+static void e113toe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+#endif
+static void e24toe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etoe113 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void toe113 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etoe64 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void toe64 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etoe53 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void toe53 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etoe24 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void toe24 PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static int ecmp PARAMS ((UEMUSHORT *, UEMUSHORT *));
#if 0
-static void eround PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-#endif
-static void ltoe PROTO((HOST_WIDE_INT *, unsigned EMUSHORT *));
-static void ultoe PROTO((unsigned HOST_WIDE_INT *, unsigned EMUSHORT *));
-static void eifrac PROTO((unsigned EMUSHORT *, HOST_WIDE_INT *,
- unsigned EMUSHORT *));
-static void euifrac PROTO((unsigned EMUSHORT *, unsigned HOST_WIDE_INT *,
- unsigned EMUSHORT *));
-static int eshift PROTO((unsigned EMUSHORT *, int));
-static int enormlz PROTO((unsigned EMUSHORT *));
+static void eround PARAMS ((UEMUSHORT *, UEMUSHORT *));
+#endif
+static void ltoe PARAMS ((HOST_WIDE_INT *, UEMUSHORT *));
+static void ultoe PARAMS ((unsigned HOST_WIDE_INT *, UEMUSHORT *));
+static void eifrac PARAMS ((UEMUSHORT *, HOST_WIDE_INT *,
+ UEMUSHORT *));
+static void euifrac PARAMS ((UEMUSHORT *, unsigned HOST_WIDE_INT *,
+ UEMUSHORT *));
+static int eshift PARAMS ((UEMUSHORT *, int));
+static int enormlz PARAMS ((UEMUSHORT *));
#if 0
-static void e24toasc PROTO((unsigned EMUSHORT *, char *, int));
-static void e53toasc PROTO((unsigned EMUSHORT *, char *, int));
-static void e64toasc PROTO((unsigned EMUSHORT *, char *, int));
-static void e113toasc PROTO((unsigned EMUSHORT *, char *, int));
+static void e24toasc PARAMS ((UEMUSHORT *, char *, int));
+static void e53toasc PARAMS ((UEMUSHORT *, char *, int));
+static void e64toasc PARAMS ((UEMUSHORT *, char *, int));
+static void e113toasc PARAMS ((UEMUSHORT *, char *, int));
#endif /* 0 */
-static void etoasc PROTO((unsigned EMUSHORT *, char *, int));
-static void asctoe24 PROTO((char *, unsigned EMUSHORT *));
-static void asctoe53 PROTO((char *, unsigned EMUSHORT *));
-static void asctoe64 PROTO((char *, unsigned EMUSHORT *));
-static void asctoe113 PROTO((char *, unsigned EMUSHORT *));
-static void asctoe PROTO((char *, unsigned EMUSHORT *));
-static void asctoeg PROTO((char *, unsigned EMUSHORT *, int));
-static void efloor PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
+static void etoasc PARAMS ((UEMUSHORT *, char *, int));
+static void asctoe24 PARAMS ((const char *, UEMUSHORT *));
+static void asctoe53 PARAMS ((const char *, UEMUSHORT *));
+static void asctoe64 PARAMS ((const char *, UEMUSHORT *));
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
+static void asctoe113 PARAMS ((const char *, UEMUSHORT *));
+#endif
+static void asctoe PARAMS ((const char *, UEMUSHORT *));
+static void asctoeg PARAMS ((const char *, UEMUSHORT *, int));
+static void efloor PARAMS ((UEMUSHORT *, UEMUSHORT *));
#if 0
-static void efrexp PROTO((unsigned EMUSHORT *, int *,
- unsigned EMUSHORT *));
+static void efrexp PARAMS ((UEMUSHORT *, int *,
+ UEMUSHORT *));
#endif
-static void eldexp PROTO((unsigned EMUSHORT *, int, unsigned EMUSHORT *));
+static void eldexp PARAMS ((UEMUSHORT *, int, UEMUSHORT *));
#if 0
-static void eremain PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
- unsigned EMUSHORT *));
+static void eremain PARAMS ((UEMUSHORT *, UEMUSHORT *,
+ UEMUSHORT *));
#endif
-static void eiremain PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void mtherr PROTO((char *, int));
+static void eiremain PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void mtherr PARAMS ((const char *, int));
#ifdef DEC
-static void dectoe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etodec PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void todec PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
+static void dectoe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etodec PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void todec PARAMS ((UEMUSHORT *, UEMUSHORT *));
#endif
#ifdef IBM
-static void ibmtoe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
+static void ibmtoe PARAMS ((UEMUSHORT *, UEMUSHORT *,
enum machine_mode));
-static void etoibm PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
+static void etoibm PARAMS ((UEMUSHORT *, UEMUSHORT *,
enum machine_mode));
-static void toibm PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
+static void toibm PARAMS ((UEMUSHORT *, UEMUSHORT *,
enum machine_mode));
#endif
#ifdef C4X
-static void c4xtoe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
+static void c4xtoe PARAMS ((UEMUSHORT *, UEMUSHORT *,
enum machine_mode));
-static void etoc4x PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
+static void etoc4x PARAMS ((UEMUSHORT *, UEMUSHORT *,
enum machine_mode));
-static void toc4x PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *,
+static void toc4x PARAMS ((UEMUSHORT *, UEMUSHORT *,
enum machine_mode));
#endif
-static void make_nan PROTO((unsigned EMUSHORT *, int, enum machine_mode));
#if 0
-static void uditoe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void ditoe PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etoudi PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void etodi PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
-static void esqrt PROTO((unsigned EMUSHORT *, unsigned EMUSHORT *));
+static void uditoe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void ditoe PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etoudi PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void etodi PARAMS ((UEMUSHORT *, UEMUSHORT *));
+static void esqrt PARAMS ((UEMUSHORT *, UEMUSHORT *));
#endif
\f
/* Copy 32-bit numbers obtained from array containing 16-bit numbers,
swapping ends if required, into output array of longs. The
- result is normally passed to fprintf by the ASM_OUTPUT_ macros. */
+ result is normally passed to fprintf by the ASM_OUTPUT_ macros. */
-static void
+static void
endian (e, x, mode)
- unsigned EMUSHORT e[];
+ UEMUSHORT e[];
long x[];
enum machine_mode mode;
{
switch (mode)
{
case TFmode:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
/* Swap halfwords in the fourth long. */
th = (unsigned long) e[6] & 0xffff;
t = (unsigned long) e[7] & 0xffff;
t |= th << 16;
x[3] = (long) t;
+#endif
case XFmode:
/* Swap halfwords in the third long. */
switch (mode)
{
case TFmode:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
/* Pack the fourth long. */
th = (unsigned long) e[7] & 0xffff;
t = (unsigned long) e[6] & 0xffff;
t |= th << 16;
x[3] = (long) t;
+#endif
case XFmode:
/* Pack the third long.
/* This is the implementation of the REAL_ARITHMETIC macro. */
-void
+void
earith (value, icode, r1, r2)
REAL_VALUE_TYPE *value;
int icode;
REAL_VALUE_TYPE *r1;
REAL_VALUE_TYPE *r2;
{
- unsigned EMUSHORT d1[NE], d2[NE], v[NE];
+ UEMUSHORT d1[NE], d2[NE], v[NE];
enum tree_code code;
GET_REAL (r1, d1);
/* Truncate REAL_VALUE_TYPE toward zero to signed HOST_WIDE_INT.
implements REAL_VALUE_RNDZINT (x) (etrunci (x)). */
-REAL_VALUE_TYPE
+REAL_VALUE_TYPE
etrunci (x)
REAL_VALUE_TYPE x;
{
- unsigned EMUSHORT f[NE], g[NE];
+ UEMUSHORT f[NE], g[NE];
REAL_VALUE_TYPE r;
HOST_WIDE_INT l;
/* Truncate REAL_VALUE_TYPE toward zero to unsigned HOST_WIDE_INT;
implements REAL_VALUE_UNSIGNED_RNDZINT (x) (etruncui (x)). */
-REAL_VALUE_TYPE
+REAL_VALUE_TYPE
etruncui (x)
REAL_VALUE_TYPE x;
{
- unsigned EMUSHORT f[NE], g[NE];
+ UEMUSHORT f[NE], g[NE];
REAL_VALUE_TYPE r;
unsigned HOST_WIDE_INT l;
}
-/* This is the REAL_VALUE_ATOF function. It converts a decimal string to
- binary, rounding off as indicated by the machine_mode argument. Then it
- promotes the rounded value to REAL_VALUE_TYPE. */
+/* This is the REAL_VALUE_ATOF function. It converts a decimal or hexadecimal
+ string to binary, rounding off as indicated by the machine_mode argument.
+ Then it promotes the rounded value to REAL_VALUE_TYPE. */
-REAL_VALUE_TYPE
+REAL_VALUE_TYPE
ereal_atof (s, t)
- char *s;
+ const char *s;
enum machine_mode t;
{
- unsigned EMUSHORT tem[NE], e[NE];
+ UEMUSHORT tem[NE], e[NE];
REAL_VALUE_TYPE r;
switch (t)
{
+#ifdef C4X
+ case QFmode:
+ case HFmode:
+ asctoe53 (s, tem);
+ e53toe (tem, e);
+ break;
+#else
case HFmode:
+#endif
+
case SFmode:
asctoe24 (s, tem);
e24toe (tem, e);
e53toe (tem, e);
break;
- case XFmode:
- asctoe64 (s, tem);
- e64toe (tem, e);
- break;
-
case TFmode:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
asctoe113 (s, tem);
e113toe (tem, e);
break;
+#endif
+ /* FALLTHRU */
+
+ case XFmode:
+ asctoe64 (s, tem);
+ e64toe (tem, e);
+ break;
default:
asctoe (s, e);
/* Expansion of REAL_NEGATE. */
-REAL_VALUE_TYPE
+REAL_VALUE_TYPE
ereal_negate (x)
REAL_VALUE_TYPE x;
{
- unsigned EMUSHORT e[NE];
+ UEMUSHORT e[NE];
REAL_VALUE_TYPE r;
GET_REAL (&x, e);
efixi (x)
REAL_VALUE_TYPE x;
{
- unsigned EMUSHORT f[NE], g[NE];
+ UEMUSHORT f[NE], g[NE];
HOST_WIDE_INT l;
GET_REAL (&x, f);
efixui (x)
REAL_VALUE_TYPE x;
{
- unsigned EMUSHORT f[NE], g[NE];
+ UEMUSHORT f[NE], g[NE];
unsigned HOST_WIDE_INT l;
GET_REAL (&x, f);
/* REAL_VALUE_FROM_INT macro. */
-void
+void
ereal_from_int (d, i, j, mode)
REAL_VALUE_TYPE *d;
HOST_WIDE_INT i, j;
enum machine_mode mode;
{
- unsigned EMUSHORT df[NE], dg[NE];
+ UEMUSHORT df[NE], dg[NE];
HOST_WIDE_INT low, high;
int sign;
break;
case 128:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
etoe113 (dg, df);
e113toe (df, dg);
+#else
+ etoe64 (dg, df);
+ e64toe (df, dg);
+#endif
break;
default:
}
-/* REAL_VALUE_FROM_UNSIGNED_INT macro. */
+/* REAL_VALUE_FROM_UNSIGNED_INT macro. */
-void
+void
ereal_from_uint (d, i, j, mode)
REAL_VALUE_TYPE *d;
unsigned HOST_WIDE_INT i, j;
enum machine_mode mode;
{
- unsigned EMUSHORT df[NE], dg[NE];
+ UEMUSHORT df[NE], dg[NE];
unsigned HOST_WIDE_INT low, high;
if (GET_MODE_CLASS (mode) != MODE_FLOAT)
break;
case 128:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
etoe113 (dg, df);
e113toe (df, dg);
+#else
+ etoe64 (dg, df);
+ e64toe (df, dg);
+#endif
break;
default:
/* REAL_VALUE_TO_INT macro. */
-void
+void
ereal_to_int (low, high, rr)
HOST_WIDE_INT *low, *high;
REAL_VALUE_TYPE rr;
{
- unsigned EMUSHORT d[NE], df[NE], dg[NE], dh[NE];
+ UEMUSHORT d[NE], df[NE], dg[NE], dh[NE];
int s;
GET_REAL (&rr, d);
REAL_VALUE_TYPE x;
int n;
{
- unsigned EMUSHORT e[NE], y[NE];
+ UEMUSHORT e[NE], y[NE];
REAL_VALUE_TYPE r;
GET_REAL (&x, e);
int
target_isinf (x)
- REAL_VALUE_TYPE x;
+ REAL_VALUE_TYPE x ATTRIBUTE_UNUSED;
{
- unsigned EMUSHORT e[NE];
-
#ifdef INFINITY
+ UEMUSHORT e[NE];
+
GET_REAL (&x, e);
return (eisinf (e));
#else
int
target_isnan (x)
- REAL_VALUE_TYPE x;
+ REAL_VALUE_TYPE x ATTRIBUTE_UNUSED;
{
- unsigned EMUSHORT e[NE];
-
#ifdef NANS
+ UEMUSHORT e[NE];
+
GET_REAL (&x, e);
return (eisnan (e));
#else
enum machine_mode mode;
REAL_VALUE_TYPE arg;
{
- unsigned EMUSHORT e[NE], t[NE];
+ UEMUSHORT e[NE], t[NE];
REAL_VALUE_TYPE r;
GET_REAL (&arg, e);
switch (mode)
{
case TFmode:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
etoe113 (e, t);
e113toe (t, t);
break;
+#endif
+ /* FALLTHRU */
case XFmode:
etoe64 (e, t);
break;
case SFmode:
+#ifndef C4X
case HFmode:
+#endif
etoe24 (e, t);
e24toe (t, t);
break;
+#ifdef C4X
+ case HFmode:
+ case QFmode:
+ etoe53 (e, t);
+ e53toe (t, t);
+ break;
+#endif
+
case SImode:
r = etrunci (arg);
return (r);
enum machine_mode mode;
REAL_VALUE_TYPE *r;
{
- unsigned EMUSHORT e[NE], einv[NE];
+ UEMUSHORT e[NE], einv[NE];
REAL_VALUE_TYPE rinv;
int i;
REAL_VALUE_TO_DECIMAL (r, "%.20g", dstr);
fprintf (stderr, "%s", dstr);
-}
+}
\f
/* The following routines convert REAL_VALUE_TYPE to the various floating
point formats that are meaningful to supported computers.
- The results are returned in 32-bit pieces, each piece stored in a `long'.
+ The results are returned in 32-bit pieces, each piece stored in a `long'.
This is so they can be printed by statements like
-
+
fprintf (file, "%lx, %lx", L[0], L[1]);
that will work on both narrow- and wide-word host computers. */
contains four 32-bit pieces of the result, in the order they would appear
in memory. */
-void
+void
etartdouble (r, l)
REAL_VALUE_TYPE r;
long l[];
{
- unsigned EMUSHORT e[NE];
+ UEMUSHORT e[NE];
GET_REAL (&r, e);
etoe113 (e, e);
contains three 32-bit pieces of the result, in the order they would
appear in memory. */
-void
+void
etarldouble (r, l)
REAL_VALUE_TYPE r;
long l[];
{
- unsigned EMUSHORT e[NE];
+ UEMUSHORT e[NE];
GET_REAL (&r, e);
etoe64 (e, e);
/* Convert R to a double precision value. The output array L contains two
32-bit pieces of the result, in the order they would appear in memory. */
-void
+void
etardouble (r, l)
REAL_VALUE_TYPE r;
long l[];
{
- unsigned EMUSHORT e[NE];
+ UEMUSHORT e[NE];
GET_REAL (&r, e);
etoe53 (e, e);
etarsingle (r)
REAL_VALUE_TYPE r;
{
- unsigned EMUSHORT e[NE];
+ UEMUSHORT e[NE];
long l;
GET_REAL (&r, e);
REAL_VALUE_TYPE x;
char *s;
{
- unsigned EMUSHORT e[NE];
+ UEMUSHORT e[NE];
GET_REAL (&x, e);
etoasc (e, s, 20);
}
/* Compare X and Y. Return 1 if X > Y, 0 if X == Y, -1 if X < Y,
- or -2 if either is a NaN. */
+ or -2 if either is a NaN. */
int
ereal_cmp (x, y)
REAL_VALUE_TYPE x, y;
{
- unsigned EMUSHORT ex[NE], ey[NE];
+ UEMUSHORT ex[NE], ey[NE];
GET_REAL (&x, ex);
GET_REAL (&y, ey);
ereal_isneg (x)
REAL_VALUE_TYPE x;
{
- unsigned EMUSHORT ex[NE];
+ UEMUSHORT ex[NE];
GET_REAL (&x, ex);
return (eisneg (ex));
most significant word first,
most significant bit is set)
ei[NI-1] low guard word (0x8000 bit is rounding place)
-
-
-
+
+
+
Routines for external format e-type numbers
-
+
asctoe (string, e) ASCII string to extended double e type
asctoe64 (string, &d) ASCII string to long double
asctoe53 (string, &d) ASCII string to double
eisinf (e) 1 if e has maximum exponent (non-IEEE)
or is infinite (IEEE)
eisnan (e) 1 if e is a NaN
-
+
Routines for internal format exploded e-type numbers
-
+
eaddm (ai, bi) add significands, bi = bi + ai
ecleaz (ei) ei = 0
ecleazs (ei) set ei = 0 but leave its sign alone
after each arithmetic operation.
Exception flags are NOT fully supported.
-
+
Signaling NaN's are NOT supported; they are treated the same
as quiet NaN's.
-
+
Define INFINITY for support of infinity; otherwise a
saturation arithmetic is implemented.
-
+
Define NANS for support of Not-a-Number items; otherwise the
arithmetic will never produce a NaN output, and might be confused
by a NaN input.
either a or b is a NaN. This means asking `if (ecmp (a,b) < 0)'
may not be legitimate. Use `if (ecmp (a,b) == -1)' for `less than'
if in doubt.
-
+
Denormals are always supported here where appropriate (e.g., not
for conversion to DEC numbers). */
mode, most floating point constants are given as arrays
of octal integers to eliminate decimal to binary conversion
errors that might be introduced by the compiler.
-
+
For computers, such as IBM PC, that follow the IEEE
Standard for Binary Floating Point Arithmetic (ANSI/IEEE
Std 754-1985), the symbol IEEE should be defined.
are provided as arrays of hexadecimal 16 bit integers.
The endian-ness of generated values is controlled by
REAL_WORDS_BIG_ENDIAN.
-
+
To accommodate other types of computer arithmetic, all
constants are also provided in a normal decimal radix
which one can hope are correctly converted to a suitable
format by the available C language compiler. To invoke
this mode, the symbol UNK is defined.
-
+
An important difference among these modes is a predefined
set of machine arithmetic constants for each. The numbers
MACHEP (the machine roundoff error), MAXNUM (largest number
represented), and several other parameters are preset by
the configuration symbol. Check the file const.c to
ensure that these values are correct for your computer.
-
+
For ANSI C compatibility, define ANSIC equal to 1. Currently
this affects only the atan2 function and others that use it. */
/* e type constants used by high precision check routines */
-#if LONG_DOUBLE_TYPE_SIZE == 128
+#if MAX_LONG_DOUBLE_TYPE_SIZE == 128 && (INTEL_EXTENDED_IEEE_FORMAT == 0)
/* 0.0 */
-unsigned EMUSHORT ezero[NE] =
+UEMUSHORT ezero[NE] =
{0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,};
-extern unsigned EMUSHORT ezero[];
+extern UEMUSHORT ezero[];
/* 5.0E-1 */
-unsigned EMUSHORT ehalf[NE] =
+UEMUSHORT ehalf[NE] =
{0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x8000, 0x3ffe,};
-extern unsigned EMUSHORT ehalf[];
+extern UEMUSHORT ehalf[];
/* 1.0E0 */
-unsigned EMUSHORT eone[NE] =
+UEMUSHORT eone[NE] =
{0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x8000, 0x3fff,};
-extern unsigned EMUSHORT eone[];
+extern UEMUSHORT eone[];
/* 2.0E0 */
-unsigned EMUSHORT etwo[NE] =
+UEMUSHORT etwo[NE] =
{0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x8000, 0x4000,};
-extern unsigned EMUSHORT etwo[];
+extern UEMUSHORT etwo[];
/* 3.2E1 */
-unsigned EMUSHORT e32[NE] =
+UEMUSHORT e32[NE] =
{0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x8000, 0x4004,};
-extern unsigned EMUSHORT e32[];
+extern UEMUSHORT e32[];
/* 6.93147180559945309417232121458176568075500134360255E-1 */
-unsigned EMUSHORT elog2[NE] =
+UEMUSHORT elog2[NE] =
{0x40f3, 0xf6af, 0x03f2, 0xb398,
0xc9e3, 0x79ab, 0150717, 0013767, 0130562, 0x3ffe,};
-extern unsigned EMUSHORT elog2[];
+extern UEMUSHORT elog2[];
/* 1.41421356237309504880168872420969807856967187537695E0 */
-unsigned EMUSHORT esqrt2[NE] =
+UEMUSHORT esqrt2[NE] =
{0x1d6f, 0xbe9f, 0x754a, 0x89b3,
0x597d, 0x6484, 0174736, 0171463, 0132404, 0x3fff,};
-extern unsigned EMUSHORT esqrt2[];
+extern UEMUSHORT esqrt2[];
/* 3.14159265358979323846264338327950288419716939937511E0 */
-unsigned EMUSHORT epi[NE] =
+UEMUSHORT epi[NE] =
{0x2902, 0x1cd1, 0x80dc, 0x628b,
0xc4c6, 0xc234, 0020550, 0155242, 0144417, 0040000,};
-extern unsigned EMUSHORT epi[];
+extern UEMUSHORT epi[];
#else
/* LONG_DOUBLE_TYPE_SIZE is other than 128 */
-unsigned EMUSHORT ezero[NE] =
+UEMUSHORT ezero[NE] =
{0, 0000000, 0000000, 0000000, 0000000, 0000000,};
-unsigned EMUSHORT ehalf[NE] =
+UEMUSHORT ehalf[NE] =
{0, 0000000, 0000000, 0000000, 0100000, 0x3ffe,};
-unsigned EMUSHORT eone[NE] =
+UEMUSHORT eone[NE] =
{0, 0000000, 0000000, 0000000, 0100000, 0x3fff,};
-unsigned EMUSHORT etwo[NE] =
+UEMUSHORT etwo[NE] =
{0, 0000000, 0000000, 0000000, 0100000, 0040000,};
-unsigned EMUSHORT e32[NE] =
+UEMUSHORT e32[NE] =
{0, 0000000, 0000000, 0000000, 0100000, 0040004,};
-unsigned EMUSHORT elog2[NE] =
+UEMUSHORT elog2[NE] =
{0xc9e4, 0x79ab, 0150717, 0013767, 0130562, 0x3ffe,};
-unsigned EMUSHORT esqrt2[NE] =
+UEMUSHORT esqrt2[NE] =
{0x597e, 0x6484, 0174736, 0171463, 0132404, 0x3fff,};
-unsigned EMUSHORT epi[NE] =
+UEMUSHORT epi[NE] =
{0xc4c6, 0xc234, 0020550, 0155242, 0144417, 0040000,};
#endif
/* Clear out entire e-type number X. */
-static void
+static void
eclear (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
- register int i;
+ int i;
for (i = 0; i < NE; i++)
*x++ = 0;
/* Move e-type number from A to B. */
-static void
+static void
emov (a, b)
- register unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- register int i;
+ int i;
for (i = 0; i < NE; i++)
*b++ = *a++;
#if 0
/* Absolute value of e-type X. */
-static void
+static void
eabs (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
/* sign is top bit of last word of external format */
- x[NE - 1] &= 0x7fff;
+ x[NE - 1] &= 0x7fff;
}
#endif /* 0 */
/* Negate the e-type number X. */
-static void
+static void
eneg (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
x[NE - 1] ^= 0x8000; /* Toggle the sign bit */
/* Return 1 if sign bit of e-type number X is nonzero, else zero. */
-static int
+static int
eisneg (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
if (x[NE - 1] & 0x8000)
/* Return 1 if e-type number X is infinity, else return zero. */
-static int
+static int
eisinf (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
#ifdef NANS
/* Check if e-type number is not a number. The bit pattern is one that we
defined, so we know for sure how to detect it. */
-static int
+static int
eisnan (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[] ATTRIBUTE_UNUSED;
{
#ifdef NANS
int i;
/* Fill e-type number X with infinity pattern (IEEE)
or largest possible number (non-IEEE). */
-static void
+static void
einfin (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
- register int i;
+ int i;
#ifdef INFINITY
for (i = 0; i < NE - 1; i++)
This generates Intel's quiet NaN pattern for extended real.
The exponent is 7fff, the leading mantissa word is c000. */
-static void
+#ifdef NANS
+static void
enan (x, sign)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
int sign;
{
- register int i;
+ int i;
for (i = 0; i < NE - 2; i++)
*x++ = 0;
*x++ = 0xc000;
*x = (sign << 15) | 0x7fff;
}
+#endif /* NANS */
/* Move in an e-type number A, converting it to exploded e-type B. */
-static void
+static void
emovi (a, b)
- unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- register unsigned EMUSHORT *p, *q;
+ UEMUSHORT *p, *q;
int i;
q = b;
/* Move out exploded e-type number A, converting it to e type B. */
-static void
+static void
emovo (a, b)
- unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- register unsigned EMUSHORT *p, *q;
- unsigned EMUSHORT i;
+ UEMUSHORT *p, *q;
+ UEMUSHORT i;
int j;
p = a;
/* Clear out exploded e-type number XI. */
-static void
+static void
ecleaz (xi)
- register unsigned EMUSHORT *xi;
+ UEMUSHORT *xi;
{
- register int i;
+ int i;
for (i = 0; i < NI; i++)
*xi++ = 0;
/* Clear out exploded e-type XI, but don't touch the sign. */
-static void
+static void
ecleazs (xi)
- register unsigned EMUSHORT *xi;
+ UEMUSHORT *xi;
{
- register int i;
+ int i;
++xi;
for (i = 0; i < NI - 1; i++)
/* Move exploded e-type number from A to B. */
-static void
+static void
emovz (a, b)
- register unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- register int i;
+ int i;
for (i = 0; i < NI - 1; i++)
*b++ = *a++;
The explicit pattern for this is maximum exponent and
top two significant bits set. */
+#ifdef NANS
static void
einan (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
ecleaz (x);
x[E] = 0x7fff;
x[M + 1] = 0xc000;
}
+#endif /* NANS */
/* Return nonzero if exploded e-type X is a NaN. */
-static int
+#ifdef NANS
+static int
eiisnan (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
int i;
}
return (0);
}
+#endif /* NANS */
/* Return nonzero if sign of exploded e-type X is nonzero. */
-static int
+#ifdef NANS
+static int
eiisneg (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
return x[0] != 0;
}
+#endif /* NANS */
#if 0
/* Fill exploded e-type X with infinity pattern.
static void
eiinfin (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
ecleaz (x);
/* Return nonzero if exploded e-type X is infinite. */
-static int
+#ifdef INFINITY
+static int
eiisinf (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
#ifdef NANS
return (1);
return (0);
}
-
+#endif /* INFINITY */
/* Compare significands of numbers in internal exploded e-type format.
Guard words are included in the comparison.
static int
ecmpm (a, b)
- register unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
int i;
/* Shift significand of exploded e-type X down by 1 bit. */
-static void
+static void
eshdn1 (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
- register unsigned EMUSHORT bits;
+ UEMUSHORT bits;
int i;
x += M; /* point to significand area */
/* Shift significand of exploded e-type X up by 1 bit. */
-static void
+static void
eshup1 (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
- register unsigned EMUSHORT bits;
+ UEMUSHORT bits;
int i;
x += NI - 1;
/* Shift significand of exploded e-type X down by 8 bits. */
-static void
+static void
eshdn8 (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
- register unsigned EMUSHORT newbyt, oldbyt;
+ UEMUSHORT newbyt, oldbyt;
int i;
x += M;
/* Shift significand of exploded e-type X up by 8 bits. */
-static void
+static void
eshup8 (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
int i;
- register unsigned EMUSHORT newbyt, oldbyt;
+ UEMUSHORT newbyt, oldbyt;
x += NI - 1;
oldbyt = 0;
/* Shift significand of exploded e-type X up by 16 bits. */
-static void
+static void
eshup6 (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
int i;
- register unsigned EMUSHORT *p;
+ UEMUSHORT *p;
p = x + M;
x += M + 1;
/* Shift significand of exploded e-type X down by 16 bits. */
-static void
+static void
eshdn6 (x)
- register unsigned EMUSHORT *x;
+ UEMUSHORT *x;
{
int i;
- register unsigned EMUSHORT *p;
+ UEMUSHORT *p;
x += NI - 1;
p = x + 1;
/* Add significands of exploded e-type X and Y. X + Y replaces Y. */
-static void
+static void
eaddm (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
- register unsigned EMULONG a;
+ unsigned EMULONG a;
int i;
unsigned int carry;
carry = 1;
else
carry = 0;
- *y = (unsigned EMUSHORT) a;
+ *y = (UEMUSHORT) a;
--x;
--y;
}
/* Subtract significands of exploded e-type X and Y. Y - X replaces Y. */
-static void
+static void
esubm (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
unsigned EMULONG a;
int i;
carry = 1;
else
carry = 0;
- *y = (unsigned EMUSHORT) a;
+ *y = (UEMUSHORT) a;
--x;
--y;
}
}
-static unsigned EMUSHORT equot[NI];
+static UEMUSHORT equot[NI];
#if 0
/* Divide significands */
-int
+int
edivm (den, num)
- unsigned EMUSHORT den[], num[];
+ UEMUSHORT den[], num[];
{
int i;
- register unsigned EMUSHORT *p, *q;
- unsigned EMUSHORT j;
+ UEMUSHORT *p, *q;
+ UEMUSHORT j;
p = &equot[0];
*p++ = num[0];
/* Multiply significands */
-int
+int
emulm (a, b)
- unsigned EMUSHORT a[], b[];
+ UEMUSHORT a[], b[];
{
- unsigned EMUSHORT *p, *q;
+ UEMUSHORT *p, *q;
int i, j, k;
equot[0] = b[0];
static void
m16m (a, b, c)
unsigned int a;
- unsigned EMUSHORT b[], c[];
+ UEMUSHORT b[], c[];
{
- register unsigned EMUSHORT *pp;
- register unsigned EMULONG carry;
- unsigned EMUSHORT *ps;
- unsigned EMUSHORT p[NI];
+ UEMUSHORT *pp;
+ unsigned EMULONG carry;
+ UEMUSHORT *ps;
+ UEMUSHORT p[NI];
unsigned EMULONG aa, m;
int i;
{
m = (unsigned EMULONG) aa * *ps--;
carry = (m & 0xffff) + *pp;
- *pp-- = (unsigned EMUSHORT)carry;
+ *pp-- = (UEMUSHORT)carry;
carry = (carry >> 16) + (m >> 16) + *pp;
- *pp = (unsigned EMUSHORT)carry;
+ *pp = (UEMUSHORT)carry;
*(pp-1) = carry >> 16;
}
}
static int
edivm (den, num)
- unsigned EMUSHORT den[], num[];
+ UEMUSHORT den[], num[];
{
int i;
- register unsigned EMUSHORT *p;
+ UEMUSHORT *p;
unsigned EMULONG tnum;
- unsigned EMUSHORT j, tdenm, tquot;
- unsigned EMUSHORT tprod[NI+1];
+ UEMUSHORT j, tdenm, tquot;
+ UEMUSHORT tprod[NI+1];
p = &equot[0];
*p++ = num[0];
tnum = (((unsigned EMULONG) num[M]) << 16) + num[M+1];
/* Do not execute the divide instruction if it will overflow. */
- if ((tdenm * 0xffffL) < tnum)
+ if ((tdenm * (unsigned long)0xffff) < tnum)
tquot = 0xffff;
else
tquot = tnum / tdenm;
static int
emulm (a, b)
- unsigned EMUSHORT a[], b[];
+ UEMUSHORT a[], b[];
{
- unsigned EMUSHORT *p, *q;
- unsigned EMUSHORT pprod[NI];
- unsigned EMUSHORT j;
+ UEMUSHORT *p, *q;
+ UEMUSHORT pprod[NI];
+ UEMUSHORT j;
int i;
equot[0] = b[0];
The internal format number to be rounded is S.
Input LOST is 0 if the value is exact. This is the so-called sticky bit.
-
+
Input SUBFLG indicates whether the number was obtained
by a subtraction operation. In that case if LOST is nonzero
then the number is slightly smaller than indicated.
-
+
Input EXP is the biased exponent, which may be negative.
the exponent field of S is ignored but is replaced by
EXP as adjusted by normalization and rounding.
-
+
Input RCNTRL is the rounding control. If it is nonzero, the
returned value will be rounded to RNDPRC bits.
adjusted to be the actual value it would have after conversion to
the final floating point type. This adjustment has been
implemented for all type conversions (etoe53, etc.) and decimal
- conversions, but not for the arithmetic functions (eadd, etc.).
+ conversions, but not for the arithmetic functions (eadd, etc.).
Data types having standard 15-bit exponents are not affected by
this, but SFmode and DFmode are affected. For example, ediv with
rndprc = 24 will not round correctly to 24-bit precision if the
- result is denormal. */
+ result is denormal. */
static int rlast = -1;
static int rw = 0;
-static unsigned EMUSHORT rmsk = 0;
-static unsigned EMUSHORT rmbit = 0;
-static unsigned EMUSHORT rebit = 0;
+static UEMUSHORT rmsk = 0;
+static UEMUSHORT rmbit = 0;
+static UEMUSHORT rebit = 0;
static int re = 0;
-static unsigned EMUSHORT rbit[NI];
+static UEMUSHORT rbit[NI];
-static void
+static void
emdnorm (s, lost, subflg, exp, rcntrl)
- unsigned EMUSHORT s[];
+ UEMUSHORT s[];
int lost;
int subflg;
EMULONG exp;
int rcntrl;
{
int i, j;
- unsigned EMUSHORT r;
+ UEMUSHORT r;
/* Normalize */
j = enormlz (s);
s[rw] &= ~rmsk;
if ((r & rmbit) != 0)
{
+#ifndef C4X
if (r == rmbit)
{
if (lost == 0)
goto mddone;
}
}
+#endif
eaddm (rbit, s);
}
mddone:
if (exp < 0)
s[1] = 0;
else
- s[1] = (unsigned EMUSHORT) exp;
+ s[1] = (UEMUSHORT) exp;
}
/* Subtract. C = B - A, all e type numbers. */
static int subflg = 0;
-static void
+static void
esub (a, b, c)
- unsigned EMUSHORT *a, *b, *c;
+ UEMUSHORT *a, *b, *c;
{
#ifdef NANS
/* Add. C = A + B, all e type. */
-static void
+static void
eadd (a, b, c)
- unsigned EMUSHORT *a, *b, *c;
+ UEMUSHORT *a, *b, *c;
{
#ifdef NANS
/* Arithmetic common to both addition and subtraction. */
-static void
+static void
eadd1 (a, b, c)
- unsigned EMUSHORT *a, *b, *c;
+ UEMUSHORT *a, *b, *c;
{
- unsigned EMUSHORT ai[NI], bi[NI], ci[NI];
+ UEMUSHORT ai[NI], bi[NI], ci[NI];
int i, lost, j, k;
EMULONG lt, lta, ltb;
break;
}
}
- bi[E] = (unsigned EMUSHORT) ltb;
+ bi[E] = (UEMUSHORT) ltb;
goto done;
}
if (i > 0)
/* Divide: C = B/A, all e type. */
-static void
+static void
ediv (a, b, c)
- unsigned EMUSHORT *a, *b, *c;
+ UEMUSHORT *a, *b, *c;
{
- unsigned EMUSHORT ai[NI], bi[NI];
+ UEMUSHORT ai[NI], bi[NI];
int i, sign;
EMULONG lt, lta, ltb;
*(c+(NE-1)) &= ~0x8000;
}
-/* Multiply e-types A and B, return e-type product C. */
+/* Multiply e-types A and B, return e-type product C. */
-static void
+static void
emul (a, b, c)
- unsigned EMUSHORT *a, *b, *c;
+ UEMUSHORT *a, *b, *c;
{
- unsigned EMUSHORT ai[NI], bi[NI];
+ UEMUSHORT ai[NI], bi[NI];
int i, j, sign;
EMULONG lt, lta, ltb;
static void
e53toe (pe, y)
- unsigned EMUSHORT *pe, *y;
+ UEMUSHORT *pe, *y;
{
#ifdef DEC
c4xtoe (pe, y, HFmode);
#else
- register unsigned EMUSHORT r;
- register unsigned EMUSHORT *e, *p;
- unsigned EMUSHORT yy[NI];
+ UEMUSHORT r;
+ UEMUSHORT *e, *p;
+ UEMUSHORT yy[NI];
int denorm, k;
e = pe;
#endif
eshift (yy, -5);
if (denorm)
- {
+ {
/* If zero exponent, then normalize the significand. */
if ((k = enormlz (yy)) > NBITS)
ecleazs (yy);
else
- yy[E] -= (unsigned EMUSHORT) (k - 1);
+ yy[E] -= (UEMUSHORT) (k - 1);
}
emovo (yy, y);
#endif /* not C4X */
/* Convert double extended precision float PE to e type Y. */
-static void
+static void
e64toe (pe, y)
- unsigned EMUSHORT *pe, *y;
+ UEMUSHORT *pe, *y;
{
- unsigned EMUSHORT yy[NI];
- unsigned EMUSHORT *e, *p, *q;
+ UEMUSHORT yy[NI];
+ UEMUSHORT *e, *p, *q;
int i;
e = pe;
is "pseudodenormal" when the exponent is zero. */
if((yy[NE-1] & 0x7fff) == 0 && (yy[NE-2] & 0x8000) == 0)
{
- unsigned EMUSHORT temp[NI];
+ UEMUSHORT temp[NI];
emovi(yy, temp);
eshup1(temp);
*q++ = *p++;
}
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
/* Convert 128-bit long double precision float PE to e type Y. */
-static void
+static void
e113toe (pe, y)
- unsigned EMUSHORT *pe, *y;
+ UEMUSHORT *pe, *y;
{
- register unsigned EMUSHORT r;
- unsigned EMUSHORT *e, *p;
- unsigned EMUSHORT yy[NI];
+ UEMUSHORT r;
+ UEMUSHORT *e, *p;
+ UEMUSHORT yy[NI];
int denorm, i;
e = pe;
}
emovo (yy, y);
}
+#endif
/* Convert single precision float PE to e type Y. */
-static void
+static void
e24toe (pe, y)
- unsigned EMUSHORT *pe, *y;
+ UEMUSHORT *pe, *y;
{
#ifdef IBM
#else
- register unsigned EMUSHORT r;
- register unsigned EMUSHORT *e, *p;
- unsigned EMUSHORT yy[NI];
+ UEMUSHORT r;
+ UEMUSHORT *e, *p;
+ UEMUSHORT yy[NI];
int denorm, k;
e = pe;
if ((k = enormlz (yy)) > NBITS)
ecleazs (yy);
else
- yy[E] -= (unsigned EMUSHORT) (k - 1);
+ yy[E] -= (UEMUSHORT) (k - 1);
}
emovo (yy, y);
#endif /* not C4X */
/* Convert e-type X to IEEE 128-bit long double format E. */
-static void
+static void
etoe113 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG exp;
int rndsav;
rndprc = 113;
emdnorm (xi, 0, 0, exp, 64);
rndprc = rndsav;
+#ifdef INFINITY
nonorm:
+#endif
toe113 (xi, e);
}
/* Convert exploded e-type X, that has already been rounded to
113-bit precision, to IEEE 128-bit long double format Y. */
-static void
+static void
toe113 (a, b)
- unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- register unsigned EMUSHORT *p, *q;
- unsigned EMUSHORT i;
+ UEMUSHORT *p, *q;
+ UEMUSHORT i;
#ifdef NANS
if (eiisnan (a))
/* Convert e-type X to IEEE double extended format E. */
-static void
+static void
etoe64 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG exp;
int rndsav;
rndprc = 64;
emdnorm (xi, 0, 0, exp, 64);
rndprc = rndsav;
+#ifdef INFINITY
nonorm:
+#endif
toe64 (xi, e);
}
/* Convert exploded e-type X, that has already been rounded to
64-bit precision, to IEEE double extended format Y. */
-static void
+static void
toe64 (a, b)
- unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- register unsigned EMUSHORT *p, *q;
- unsigned EMUSHORT i;
+ UEMUSHORT *p, *q;
+ UEMUSHORT i;
#ifdef NANS
if (eiisnan (a))
else
{
q = b + 4; /* point to output exponent */
-#if LONG_DOUBLE_TYPE_SIZE == 96
- /* Clear the last two bytes of 12-byte Intel format */
+ /* Clear the last two bytes of 12-byte Intel format. q is pointing
+ into an array of size 6 (e.g. x[NE]), so the last two bytes are
+ always there, and there are never more bytes, even when we are using
+ INTEL_EXTENDED_IEEE_FORMAT. */
*(q+1) = 0;
-#endif
}
#endif
#ifdef DEC
/* Convert e-type X to DEC-format double E. */
-static void
+static void
etoe53 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
etodec (x, e); /* see etodec.c */
}
/* Convert exploded e-type X, that has already been rounded to
56-bit double precision, to DEC double Y. */
-static void
+static void
toe53 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
todec (x, y);
}
#ifdef IBM
/* Convert e-type X to IBM 370-format double E. */
-static void
+static void
etoe53 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
etoibm (x, e, DFmode);
}
/* Convert exploded e-type X, that has already been rounded to
56-bit precision, to IBM 370 double Y. */
-static void
+static void
toe53 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
toibm (x, y, DFmode);
}
#else /* it's neither DEC nor IBM */
#ifdef C4X
-/* Convert e-type X to C4X-format double E. */
+/* Convert e-type X to C4X-format long double E. */
-static void
+static void
etoe53 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
etoc4x (x, e, HFmode);
}
/* Convert exploded e-type X, that has already been rounded to
56-bit precision, to IBM 370 double Y. */
-static void
+static void
toe53 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
toc4x (x, y, HFmode);
}
/* Convert e-type X to IEEE double E. */
-static void
+static void
etoe53 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG exp;
int rndsav;
rndprc = 53;
emdnorm (xi, 0, 0, exp, 64);
rndprc = rndsav;
+#ifdef INFINITY
nonorm:
+#endif
toe53 (xi, e);
}
/* Convert exploded e-type X, that has already been rounded to
53-bit precision, to IEEE double Y. */
-static void
+static void
toe53 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
- unsigned EMUSHORT i;
- unsigned EMUSHORT *p;
+ UEMUSHORT i;
+ UEMUSHORT *p;
#ifdef NANS
if (eiisnan (x))
*y++ = 0;
}
#else
- *y |= (unsigned EMUSHORT) 0x7fef;
+ *y |= (UEMUSHORT) 0x7fef;
if (! REAL_WORDS_BIG_ENDIAN)
{
*(--y) = 0xffff;
i <<= 4;
eshift (x, 5);
}
- i |= *p++ & (unsigned EMUSHORT) 0x0f; /* *p = xi[M] */
- *y |= (unsigned EMUSHORT) i; /* high order output already has sign bit set */
+ i |= *p++ & (UEMUSHORT) 0x0f; /* *p = xi[M] */
+ *y |= (UEMUSHORT) i; /* high order output already has sign bit set */
if (! REAL_WORDS_BIG_ENDIAN)
{
*(--y) = *p++;
#ifdef IBM
/* Convert e-type X to IBM 370 float E. */
-static void
+static void
etoe24 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
etoibm (x, e, SFmode);
}
/* Convert exploded e-type X, that has already been rounded to
float precision, to IBM 370 float Y. */
-static void
+static void
toe24 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
toibm (x, y, SFmode);
}
#ifdef C4X
/* Convert e-type X to C4X float E. */
-static void
+static void
etoe24 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
etoc4x (x, e, QFmode);
}
/* Convert exploded e-type X, that has already been rounded to
float precision, to IBM 370 float Y. */
-static void
+static void
toe24 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
toc4x (x, y, QFmode);
}
/* Convert e-type X to IEEE float E. DEC float is the same as IEEE float. */
-static void
+static void
etoe24 (x, e)
- unsigned EMUSHORT *x, *e;
+ UEMUSHORT *x, *e;
{
EMULONG exp;
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
int rndsav;
#ifdef NANS
rndprc = 24;
emdnorm (xi, 0, 0, exp, 64);
rndprc = rndsav;
+#ifdef INFINITY
nonorm:
+#endif
toe24 (xi, e);
}
/* Convert exploded e-type X, that has already been rounded to
float precision, to IEEE float Y. */
-static void
+static void
toe24 (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
- unsigned EMUSHORT i;
- unsigned EMUSHORT *p;
+ UEMUSHORT i;
+ UEMUSHORT *p;
#ifdef NANS
if (eiisnan (x))
if (i >= 255)
{
#ifdef INFINITY
- *y |= (unsigned EMUSHORT) 0x7f80;
+ *y |= (UEMUSHORT) 0x7f80;
#ifdef DEC
*(--y) = 0;
#endif
}
#endif
#else /* no INFINITY */
- *y |= (unsigned EMUSHORT) 0x7f7f;
+ *y |= (UEMUSHORT) 0x7f7f;
#ifdef DEC
*(--y) = 0xffff;
#endif
i <<= 7;
eshift (x, 8);
}
- i |= *p++ & (unsigned EMUSHORT) 0x7f; /* *p = xi[M] */
+ i |= *p++ & (UEMUSHORT) 0x7f; /* *p = xi[M] */
/* High order output already has sign bit set. */
*y |= i;
#ifdef DEC
#endif /* not C4X */
#endif /* not IBM */
-/* Compare two e type numbers.
+/* Compare two e type numbers.
Return +1 if a > b
0 if a == b
-1 if a < b
-2 if either a or b is a NaN. */
-static int
+static int
ecmp (a, b)
- unsigned EMUSHORT *a, *b;
+ UEMUSHORT *a, *b;
{
- unsigned EMUSHORT ai[NI], bi[NI];
- register unsigned EMUSHORT *p, *q;
- register int i;
+ UEMUSHORT ai[NI], bi[NI];
+ UEMUSHORT *p, *q;
+ int i;
int msign;
#ifdef NANS
#if 0
/* Find e-type nearest integer to X, as floor (X + 0.5). */
-static void
+static void
eround (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
eadd (ehalf, x, y);
efloor (y, y);
/* Convert HOST_WIDE_INT LP to e type Y. */
-static void
+static void
ltoe (lp, y)
HOST_WIDE_INT *lp;
- unsigned EMUSHORT *y;
+ UEMUSHORT *y;
{
- unsigned EMUSHORT yi[NI];
+ UEMUSHORT yi[NI];
unsigned HOST_WIDE_INT ll;
int k;
}
/* move the long integer to yi significand area */
#if HOST_BITS_PER_WIDE_INT == 64
- yi[M] = (unsigned EMUSHORT) (ll >> 48);
- yi[M + 1] = (unsigned EMUSHORT) (ll >> 32);
- yi[M + 2] = (unsigned EMUSHORT) (ll >> 16);
- yi[M + 3] = (unsigned EMUSHORT) ll;
+ yi[M] = (UEMUSHORT) (ll >> 48);
+ yi[M + 1] = (UEMUSHORT) (ll >> 32);
+ yi[M + 2] = (UEMUSHORT) (ll >> 16);
+ yi[M + 3] = (UEMUSHORT) ll;
yi[E] = EXONE + 47; /* exponent if normalize shift count were 0 */
#else
- yi[M] = (unsigned EMUSHORT) (ll >> 16);
- yi[M + 1] = (unsigned EMUSHORT) ll;
+ yi[M] = (UEMUSHORT) (ll >> 16);
+ yi[M + 1] = (UEMUSHORT) ll;
yi[E] = EXONE + 15; /* exponent if normalize shift count were 0 */
#endif
if ((k = enormlz (yi)) > NBITS)/* normalize the significand */
ecleaz (yi); /* it was zero */
else
- yi[E] -= (unsigned EMUSHORT) k;/* subtract shift count from exponent */
+ yi[E] -= (UEMUSHORT) k;/* subtract shift count from exponent */
emovo (yi, y); /* output the answer */
}
/* Convert unsigned HOST_WIDE_INT LP to e type Y. */
-static void
+static void
ultoe (lp, y)
unsigned HOST_WIDE_INT *lp;
- unsigned EMUSHORT *y;
+ UEMUSHORT *y;
{
- unsigned EMUSHORT yi[NI];
+ UEMUSHORT yi[NI];
unsigned HOST_WIDE_INT ll;
int k;
/* move the long integer to ayi significand area */
#if HOST_BITS_PER_WIDE_INT == 64
- yi[M] = (unsigned EMUSHORT) (ll >> 48);
- yi[M + 1] = (unsigned EMUSHORT) (ll >> 32);
- yi[M + 2] = (unsigned EMUSHORT) (ll >> 16);
- yi[M + 3] = (unsigned EMUSHORT) ll;
+ yi[M] = (UEMUSHORT) (ll >> 48);
+ yi[M + 1] = (UEMUSHORT) (ll >> 32);
+ yi[M + 2] = (UEMUSHORT) (ll >> 16);
+ yi[M + 3] = (UEMUSHORT) ll;
yi[E] = EXONE + 47; /* exponent if normalize shift count were 0 */
#else
- yi[M] = (unsigned EMUSHORT) (ll >> 16);
- yi[M + 1] = (unsigned EMUSHORT) ll;
+ yi[M] = (UEMUSHORT) (ll >> 16);
+ yi[M + 1] = (UEMUSHORT) ll;
yi[E] = EXONE + 15; /* exponent if normalize shift count were 0 */
#endif
if ((k = enormlz (yi)) > NBITS)/* normalize the significand */
ecleaz (yi); /* it was zero */
else
- yi[E] -= (unsigned EMUSHORT) k; /* subtract shift count from exponent */
+ yi[E] -= (UEMUSHORT) k; /* subtract shift count from exponent */
emovo (yi, y); /* output the answer */
}
The output e-type fraction FRAC is the positive fractional
part of abs (X). */
-static void
+static void
eifrac (x, i, frac)
- unsigned EMUSHORT *x;
+ UEMUSHORT *x;
HOST_WIDE_INT *i;
- unsigned EMUSHORT *frac;
+ UEMUSHORT *frac;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
int j, k;
unsigned HOST_WIDE_INT ll;
if ((k = enormlz (xi)) > NBITS)
ecleaz (xi);
else
- xi[E] -= (unsigned EMUSHORT) k;
+ xi[E] -= (UEMUSHORT) k;
emovo (xi, frac);
}
FRAC of e-type X. A negative input yields integer output = 0 but
correct fraction. */
-static void
+static void
euifrac (x, i, frac)
- unsigned EMUSHORT *x;
+ UEMUSHORT *x;
unsigned HOST_WIDE_INT *i;
- unsigned EMUSHORT *frac;
+ UEMUSHORT *frac;
{
unsigned HOST_WIDE_INT ll;
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
int j, k;
emovi (x, xi);
{
/* Long integer overflow: output large integer
and correct fraction.
- Note, the BSD microvax compiler says that ~(0UL)
+ Note, the BSD MicroVAX compiler says that ~(0UL)
is a syntax error. */
*i = ~(0L);
eshift (xi, k);
if ((k = enormlz (xi)) > NBITS)
ecleaz (xi);
else
- xi[E] -= (unsigned EMUSHORT) k;
+ xi[E] -= (UEMUSHORT) k;
emovo (xi, frac);
}
/* Shift the significand of exploded e-type X up or down by SC bits. */
-static int
+static int
eshift (x, sc)
- unsigned EMUSHORT *x;
+ UEMUSHORT *x;
int sc;
{
- unsigned EMUSHORT lost;
- unsigned EMUSHORT *p;
+ UEMUSHORT lost;
+ UEMUSHORT *p;
if (sc == 0)
return (0);
/* Shift normalize the significand area of exploded e-type X.
Return the shift count (up = positive). */
-static int
+static int
enormlz (x)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
{
- register unsigned EMUSHORT *p;
+ UEMUSHORT *p;
int sc;
sc = 0;
#define NTEN 12
#define MAXP 4096
-#if LONG_DOUBLE_TYPE_SIZE == 128
-static unsigned EMUSHORT etens[NTEN + 1][NE] =
+#if MAX_LONG_DOUBLE_TYPE_SIZE == 128 && (INTEL_EXTENDED_IEEE_FORMAT == 0)
+static UEMUSHORT etens[NTEN + 1][NE] =
{
{0x6576, 0x4a92, 0x804a, 0x153f,
0xc94c, 0x979a, 0x8a20, 0x5202, 0xc460, 0x7525,}, /* 10**4096 */
0x0000, 0x0000, 0x0000, 0x0000, 0xa000, 0x4002,}, /* 10**1 */
};
-static unsigned EMUSHORT emtens[NTEN + 1][NE] =
+static UEMUSHORT emtens[NTEN + 1][NE] =
{
{0x2030, 0xcffc, 0xa1c3, 0x8123,
0x2de3, 0x9fde, 0xd2ce, 0x04c8, 0xa6dd, 0x0ad8,}, /* 10**-4096 */
};
#else
/* LONG_DOUBLE_TYPE_SIZE is other than 128 */
-static unsigned EMUSHORT etens[NTEN + 1][NE] =
+static UEMUSHORT etens[NTEN + 1][NE] =
{
{0xc94c, 0x979a, 0x8a20, 0x5202, 0xc460, 0x7525,}, /* 10**4096 */
{0xa74d, 0x5de4, 0xc53d, 0x3b5d, 0x9e8b, 0x5a92,}, /* 10**2048 */
{0x0000, 0x0000, 0x0000, 0x0000, 0xa000, 0x4002,}, /* 10**1 */
};
-static unsigned EMUSHORT emtens[NTEN + 1][NE] =
+static UEMUSHORT emtens[NTEN + 1][NE] =
{
{0x2de4, 0x9fde, 0xd2ce, 0x04c8, 0xa6dd, 0x0ad8,}, /* 10**-4096 */
{0x4925, 0x2de4, 0x3436, 0x534f, 0xceae, 0x256b,}, /* 10**-2048 */
/* Convert float value X to ASCII string STRING with NDIG digits after
the decimal point. */
-static void
+static void
e24toasc (x, string, ndigs)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
char *string;
int ndigs;
{
- unsigned EMUSHORT w[NI];
+ UEMUSHORT w[NI];
e24toe (x, w);
etoasc (w, string, ndigs);
/* Convert double value X to ASCII string STRING with NDIG digits after
the decimal point. */
-static void
+static void
e53toasc (x, string, ndigs)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
char *string;
int ndigs;
{
- unsigned EMUSHORT w[NI];
+ UEMUSHORT w[NI];
e53toe (x, w);
etoasc (w, string, ndigs);
/* Convert double extended value X to ASCII string STRING with NDIG digits
after the decimal point. */
-static void
+static void
e64toasc (x, string, ndigs)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
char *string;
int ndigs;
{
- unsigned EMUSHORT w[NI];
+ UEMUSHORT w[NI];
e64toe (x, w);
etoasc (w, string, ndigs);
/* Convert 128-bit long double value X to ASCII string STRING with NDIG digits
after the decimal point. */
-static void
+static void
e113toasc (x, string, ndigs)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
char *string;
int ndigs;
{
- unsigned EMUSHORT w[NI];
+ UEMUSHORT w[NI];
e113toe (x, w);
etoasc (w, string, ndigs);
static char wstring[80]; /* working storage for ASCII output */
-static void
+static void
etoasc (x, string, ndigs)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
char *string;
int ndigs;
{
EMUSHORT digit;
- unsigned EMUSHORT y[NI], t[NI], u[NI], w[NI];
- unsigned EMUSHORT *p, *r, *ten;
- unsigned EMUSHORT sign;
+ UEMUSHORT y[NI], t[NI], u[NI], w[NI];
+ UEMUSHORT *p, *r, *ten;
+ UEMUSHORT sign;
int i, j, k, expon, rndsav;
char *s, *ss;
- unsigned EMUSHORT m;
+ UEMUSHORT m;
rndsav = rndprc;
emovo (y, t);
if (ecmp (t, ezero) != 0)
goto roun; /* round to nearest */
+#ifndef C4X
if ((*(s - 1) & 1) == 0)
goto doexp; /* round to even */
+#endif
}
/* Round up and propagate carry-outs */
roun:
--s;
- k = *s & 0x7f;
+ k = *s & CHARMASK;
/* Carry out to most significant digit? */
if (k == '.')
{
/* Convert ASCII string S to single precision float value Y. */
-static void
+static void
asctoe24 (s, y)
- char *s;
- unsigned EMUSHORT *y;
+ const char *s;
+ UEMUSHORT *y;
{
asctoeg (s, y, 24);
}
/* Convert ASCII string S to double precision value Y. */
-static void
+static void
asctoe53 (s, y)
- char *s;
- unsigned EMUSHORT *y;
+ const char *s;
+ UEMUSHORT *y;
{
#if defined(DEC) || defined(IBM)
asctoeg (s, y, 56);
/* Convert ASCII string S to double extended value Y. */
-static void
+static void
asctoe64 (s, y)
- char *s;
- unsigned EMUSHORT *y;
+ const char *s;
+ UEMUSHORT *y;
{
asctoeg (s, y, 64);
}
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
/* Convert ASCII string S to 128-bit long double Y. */
-static void
+static void
asctoe113 (s, y)
- char *s;
- unsigned EMUSHORT *y;
+ const char *s;
+ UEMUSHORT *y;
{
asctoeg (s, y, 113);
}
+#endif
/* Convert ASCII string S to e type Y. */
-static void
+static void
asctoe (s, y)
- char *s;
- unsigned EMUSHORT *y;
+ const char *s;
+ UEMUSHORT *y;
{
asctoeg (s, y, NBITS);
}
/* Convert ASCII string SS to e type Y, with a specified rounding precision
- of OPREC bits. */
+ of OPREC bits. BASE is 16 for C99 hexadecimal floating constants. */
-static void
+static void
asctoeg (ss, y, oprec)
- char *ss;
- unsigned EMUSHORT *y;
+ const char *ss;
+ UEMUSHORT *y;
int oprec;
{
- unsigned EMUSHORT yy[NI], xt[NI], tt[NI];
+ UEMUSHORT yy[NI], xt[NI], tt[NI];
int esign, decflg, sgnflg, nexp, exp, prec, lost;
- int k, trail, c, rndsav;
+ int i, k, trail, c, rndsav;
EMULONG lexp;
- unsigned EMUSHORT nsign, *p;
+ UEMUSHORT nsign;
char *sp, *s, *lstr;
+ int base = 10;
/* Copy the input string. */
lstr = (char *) alloca (strlen (ss) + 1);
- s = ss;
- while (*s == ' ') /* skip leading spaces */
- ++s;
+
+ while (*ss == ' ') /* skip leading spaces */
+ ++ss;
+
sp = lstr;
- while ((*sp++ = *s++) != '\0')
+ while ((*sp++ = *ss++) != '\0')
;
s = lstr;
+ if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'))
+ {
+ base = 16;
+ s += 2;
+ }
+
rndsav = rndprc;
rndprc = NBITS; /* Set to full precision */
lost = 0;
trail = 0;
nxtcom:
- k = *s - '0';
- if ((k >= 0) && (k <= 9))
+ if (ISDIGIT (*s))
+ k = *s - '0';
+ else if (*s >= 'a' && *s <= 'f')
+ k = 10 + *s - 'a';
+ else
+ k = 10 + *s - 'A';
+ if ((k >= 0) && (k < base))
{
/* Ignore leading zeros */
if ((prec == 0) && (decflg == 0) && (k == 0))
if ((trail == 0) && (decflg != 0))
{
sp = s;
- while ((*sp >= '0') && (*sp <= '9'))
+ while (ISDIGIT (*sp)
+ || (base == 16 && ((*sp >= 'a' && *sp <= 'f')
+ || (*sp >= 'A' && *sp <= 'F'))))
++sp;
/* Check for syntax error */
- c = *sp & 0x7f;
- if ((c != 'e') && (c != 'E') && (c != '\0')
+ c = *sp & CHARMASK;
+ if ((base != 10 || ((c != 'e') && (c != 'E')))
+ && (base != 16 || ((c != 'p') && (c != 'P')))
+ && (c != '\0')
&& (c != '\n') && (c != '\r') && (c != ' ')
&& (c != ','))
- goto error;
+ goto unexpected_char_error;
--sp;
while (*sp == '0')
*sp-- = 'z';
if (yy[2] == 0)
{
- if (decflg)
- nexp += 1; /* count digits after decimal point */
- eshup1 (yy); /* multiply current number by 10 */
- emovz (yy, xt);
- eshup1 (xt);
- eshup1 (xt);
- eaddm (xt, yy);
+ if (base == 16)
+ {
+ if (decflg)
+ nexp += 4; /* count digits after decimal point */
+
+ eshup1 (yy); /* multiply current number by 16 */
+ eshup1 (yy);
+ eshup1 (yy);
+ eshup1 (yy);
+ }
+ else
+ {
+ if (decflg)
+ nexp += 1; /* count digits after decimal point */
+
+ eshup1 (yy); /* multiply current number by 10 */
+ emovz (yy, xt);
+ eshup1 (xt);
+ eshup1 (xt);
+ eaddm (xt, yy);
+ }
+ /* Insert the current digit. */
ecleaz (xt);
- xt[NI - 2] = (unsigned EMUSHORT) k;
+ xt[NI - 2] = (UEMUSHORT) k;
eaddm (xt, yy);
}
else
lost |= k;
/* Count lost digits before the decimal point. */
if (decflg == 0)
- nexp -= 1;
+ {
+ if (base == 10)
+ nexp -= 1;
+ else
+ nexp -= 4;
+ }
}
prec += 1;
goto donchr;
break;
case 'E':
case 'e':
+ case 'P':
+ case 'p':
goto expnt;
case '.': /* decimal point */
if (decflg)
- goto error;
+ goto unexpected_char_error;
++decflg;
break;
case '-':
nsign = 0xffff;
if (sgnflg)
- goto error;
+ goto unexpected_char_error;
++sgnflg;
break;
case '+':
if (sgnflg)
- goto error;
+ goto unexpected_char_error;
++sgnflg;
break;
case ',':
case 'I':
goto infinite;
default:
- error:
+ unexpected_char_error:
#ifdef NANS
einan (yy);
#else
/* Exponent interpretation */
expnt:
- /* 0.0eXXX is zero, regardless of XXX. Check for the 0.0. */
+ /* 0.0eXXX is zero, regardless of XXX. Check for the 0.0. */
for (k = 0; k < NI; k++)
{
if (yy[k] != 0)
}
if (*s == '+')
++s;
- while ((*s >= '0') && (*s <= '9'))
+ while (ISDIGIT (*s))
{
exp *= 10;
exp += *s++ - '0';
- if (exp > -(MINDECEXP))
- {
- if (esign < 0)
- goto zero;
- else
- goto infinite;
- }
+ if (exp > 999999)
+ break;
}
if (esign < 0)
exp = -exp;
- if (exp > MAXDECEXP)
+ if ((exp > MAXDECEXP) && (base == 10))
{
infinite:
ecleaz (yy);
yy[E] = 0x7fff; /* infinity */
goto aexit;
}
- if (exp < MINDECEXP)
+ if ((exp < MINDECEXP) && (base == 10))
{
zero:
ecleaz (yy);
}
daldone:
+ if (base == 16)
+ {
+ /* Base 16 hexadecimal floating constant. */
+ if ((k = enormlz (yy)) > NBITS)
+ {
+ ecleaz (yy);
+ goto aexit;
+ }
+ /* Adjust the exponent. NEXP is the number of hex digits,
+ EXP is a power of 2. */
+ lexp = (EXONE - 1 + NBITS) - k + yy[E] + exp - nexp;
+ if (lexp > 0x7fff)
+ goto infinite;
+ if (lexp < 0)
+ goto zero;
+ yy[E] = lexp;
+ goto expdon;
+ }
+
nexp = exp - nexp;
/* Pad trailing zeros to minimize power of 10, per IEEE spec. */
while ((nexp > 0) && (yy[2] == 0))
}
lexp = (EXONE - 1 + NBITS) - k;
emdnorm (yy, lost, 0, lexp, 64);
+ lost = 0;
/* Convert to external format:
nexp -= 4096;
}
}
- p = &etens[NTEN][0];
emov (eone, xt);
exp = 1;
+ i = NTEN;
do
{
if (exp & nexp)
- emul (p, xt, xt);
- p -= NE;
+ emul (etens[i], xt, xt);
+ i--;
exp = exp + exp;
}
while (exp <= MAXP);
k = emulm (tt, yy);
lexp -= EXONE - 1;
}
+ lost = k;
expdon:
lexp -= EXONE - 0201;
#endif
rndprc = oprec;
- emdnorm (yy, k, 0, lexp, 64);
+ emdnorm (yy, lost, 0, lexp, 64);
aexit:
/* Return Y = largest integer not greater than X (truncated toward minus
infinity). */
-static unsigned EMUSHORT bmask[] =
+static const UEMUSHORT bmask[] =
{
0xffff,
0xfffe,
0x0000,
};
-static void
+static void
efloor (x, y)
- unsigned EMUSHORT x[], y[];
+ UEMUSHORT x[], y[];
{
- register unsigned EMUSHORT *p;
+ UEMUSHORT *p;
int e, expon, i;
- unsigned EMUSHORT f[NE];
+ UEMUSHORT f[NE];
emov (x, f); /* leave in external format */
expon = (int) f[NE - 1];
/* truncate negatives toward minus infinity */
isitneg:
- if ((unsigned EMUSHORT) expon & (unsigned EMUSHORT) 0x8000)
+ if ((UEMUSHORT) expon & (UEMUSHORT) 0x8000)
{
for (i = 0; i < NE - 1; i++)
{
/* Return S and EXP such that S * 2^EXP = X and .5 <= S < 1.
For example, 1.1 = 0.55 * 2^1. */
-static void
+static void
efrexp (x, exp, s)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
int *exp;
- unsigned EMUSHORT s[];
+ UEMUSHORT s[];
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG li;
emovi (x, xi);
/* Return e type Y = X * 2^PWR2. */
-static void
+static void
eldexp (x, pwr2, y)
- unsigned EMUSHORT x[];
+ UEMUSHORT x[];
int pwr2;
- unsigned EMUSHORT y[];
+ UEMUSHORT y[];
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG li;
int i;
/* C = remainder after dividing B by A, all e type values.
Least significant integer quotient bits left in EQUOT. */
-static void
+static void
eremain (a, b, c)
- unsigned EMUSHORT a[], b[], c[];
+ UEMUSHORT a[], b[], c[];
{
- unsigned EMUSHORT den[NI], num[NI];
+ UEMUSHORT den[NI], num[NI];
#ifdef NANS
if (eisinf (b)
/* Return quotient of exploded e-types NUM / DEN in EQUOT,
remainder in NUM. */
-static void
+static void
eiremain (den, num)
- unsigned EMUSHORT den[], num[];
+ UEMUSHORT den[], num[];
{
EMULONG ld, ln;
- unsigned EMUSHORT j;
+ UEMUSHORT j;
ld = den[E];
ld -= enormlz (den);
}
/* Report an error condition CODE encountered in function NAME.
- CODE is one of the following:
Mnemonic Value Significance
-
+
DOMAIN 1 argument domain error
SING 2 function singularity
OVERFLOW 3 overflow range error
INVALID 7 NaN - producing operation
EDOM 33 Unix domain error code
ERANGE 34 Unix range error code
-
+
The order of appearance of the following messages is bound to the
error codes defined above. */
-#define NMSGS 8
-static char *ermsg[NMSGS] =
-{
- "unknown", /* error code 0 */
- "domain", /* error code 1 */
- "singularity", /* et seq. */
- "overflow",
- "underflow",
- "total loss of precision",
- "partial loss of precision",
- "invalid operation"
-};
-
int merror = 0;
extern int merror;
-static void
+static void
mtherr (name, code)
- char *name;
+ const char *name;
int code;
{
- char errstr[80];
-
/* The string passed by the calling program is supposed to be the
name of the function in which the error occurred.
The code argument selects which error message string will be printed. */
- if ((code <= 0) || (code >= NMSGS))
- code = 0;
- sprintf (errstr, " %s %s error", name, ermsg[code]);
+ if (strcmp (name, "esub") == 0)
+ name = "subtraction";
+ else if (strcmp (name, "ediv") == 0)
+ name = "division";
+ else if (strcmp (name, "emul") == 0)
+ name = "multiplication";
+ else if (strcmp (name, "enormlz") == 0)
+ name = "normalization";
+ else if (strcmp (name, "etoasc") == 0)
+ name = "conversion to text";
+ else if (strcmp (name, "asctoe") == 0)
+ name = "parsing";
+ else if (strcmp (name, "eremain") == 0)
+ name = "modulus";
+ else if (strcmp (name, "esqrt") == 0)
+ name = "square root";
if (extra_warnings)
- warning (errstr);
+ {
+ switch (code)
+ {
+ case DOMAIN: warning ("%s: argument domain error" , name); break;
+ case SING: warning ("%s: function singularity" , name); break;
+ case OVERFLOW: warning ("%s: overflow range error" , name); break;
+ case UNDERFLOW: warning ("%s: underflow range error" , name); break;
+ case TLOSS: warning ("%s: total loss of precision" , name); break;
+ case PLOSS: warning ("%s: partial loss of precision", name); break;
+ case INVALID: warning ("%s: NaN - producing operation", name); break;
+ default: abort ();
+ }
+ }
+
/* Set global error message word */
merror = code + 1;
}
#ifdef DEC
/* Convert DEC double precision D to e type E. */
-static void
+static void
dectoe (d, e)
- unsigned EMUSHORT *d;
- unsigned EMUSHORT *e;
+ UEMUSHORT *d;
+ UEMUSHORT *e;
{
- unsigned EMUSHORT y[NI];
- register unsigned EMUSHORT r, *p;
+ UEMUSHORT y[NI];
+ UEMUSHORT r, *p;
ecleaz (y); /* start with a zero */
p = y; /* point to our number */
/* Convert e type X to DEC double precision D. */
-static void
+static void
etodec (x, d)
- unsigned EMUSHORT *x, *d;
+ UEMUSHORT *x, *d;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG exp;
int rndsav;
/* Convert exploded e-type X, that has already been rounded to
56-bit precision, to DEC format double Y. */
-static void
+static void
todec (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
- unsigned EMUSHORT i;
- unsigned EMUSHORT *p;
+ UEMUSHORT i;
+ UEMUSHORT *p;
p = x;
*y = 0;
#ifdef IBM
/* Convert IBM single/double precision to e type. */
-static void
+static void
ibmtoe (d, e, mode)
- unsigned EMUSHORT *d;
- unsigned EMUSHORT *e;
+ UEMUSHORT *d;
+ UEMUSHORT *e;
enum machine_mode mode;
{
- unsigned EMUSHORT y[NI];
- register unsigned EMUSHORT r, *p;
- int rndsav;
+ UEMUSHORT y[NI];
+ UEMUSHORT r, *p;
ecleaz (y); /* start with a zero */
p = y; /* point to our number */
/* Convert e type to IBM single/double precision. */
-static void
+static void
etoibm (x, d, mode)
- unsigned EMUSHORT *x, *d;
+ UEMUSHORT *x, *d;
enum machine_mode mode;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG exp;
int rndsav;
toibm (xi, d, mode);
}
-static void
+static void
toibm (x, y, mode)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
enum machine_mode mode;
{
- unsigned EMUSHORT i;
- unsigned EMUSHORT *p;
+ UEMUSHORT i;
+ UEMUSHORT *p;
int r;
p = x;
#ifdef C4X
/* Convert C4X single/double precision to e type. */
-static void
+static void
c4xtoe (d, e, mode)
- unsigned EMUSHORT *d;
- unsigned EMUSHORT *e;
+ UEMUSHORT *d;
+ UEMUSHORT *e;
enum machine_mode mode;
{
- unsigned EMUSHORT y[NI];
+ UEMUSHORT y[NI];
int r;
- int rndsav;
int isnegative;
int size;
int i;
int carry;
- /* Short-circuit the zero case. */
+ /* Short-circuit the zero case. */
if ((d[0] == 0x8000)
&& (d[1] == 0x0000)
&& ((mode == QFmode) || ((d[2] == 0x0000) && (d[3] == 0x0000))))
{
isnegative = FALSE;
}
-
+
r >>= 8; /* Shift exponent word down 8 bits. */
- if (r & 0x80) /* Make the exponent negative if it is. */
+ if (r & 0x80) /* Make the exponent negative if it is. */
{
r = r | (~0 & ~0xff);
}
/* Now do the high order mantissa. We don't "or" on the high bit
because it is 2 (not 1) and is handled a little differently
below. */
- y[M] = d[0] & 0x7f;
+ y[M] = d[0] & 0x7f;
y[M+1] = d[1];
if (mode != QFmode) /* There are only 2 words in QFmode. */
/* Now do the two's complement on the data. */
- carry = 1; /* Initially add 1 for the two's complement. */
+ carry = 1; /* Initially add 1 for the two's complement. */
for (i=size + M; i > M; i--)
{
if (carry && (y[i] == 0x0000))
{
/* Add our e type exponent offset to form our exponent. */
r += EXONE;
- y[1] = r;
+ y[1] = r;
/* Now do the high order mantissa strip off the exponent and sign
bits and add the high 1 bit. */
- y[M] = d[0] & 0x7f | 0x80;
+ y[M] = (d[0] & 0x7f) | 0x80;
y[M+1] = d[1];
if (mode != QFmode) /* There are only 2 words in QFmode. */
/* Convert e type to C4X single/double precision. */
-static void
+static void
etoc4x (x, d, mode)
- unsigned EMUSHORT *x, *d;
+ UEMUSHORT *x, *d;
enum machine_mode mode;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
EMULONG exp;
int rndsav;
emovi (x, xi);
- /* Adjust exponent for offsets. */
+ /* Adjust exponent for offsets. */
exp = (EMULONG) xi[E] - (EXONE - 0x7f);
- /* Round off to nearest or even. */
+ /* Round off to nearest or even. */
rndsav = rndprc;
rndprc = mode == QFmode ? 24 : 32;
emdnorm (xi, 0, 0, exp, 64);
toc4x (xi, d, mode);
}
-static void
+static void
toc4x (x, y, mode)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
enum machine_mode mode;
{
int i;
- int r;
int v;
int carry;
-
+
/* Short-circuit the zero case */
if ((x[0] == 0) /* Zero exponent and sign */
&& (x[1] == 0)
/* Only check for double if necessary */
&& ((mode == QFmode) || ((x[M+2] == 0) && (x[M+3] == 0))))
{
- /* We have a zero. Put it into the output and return. */
+ /* We have a zero. Put it into the output and return. */
*y++ = 0x8000;
*y++ = 0x0000;
if (mode != QFmode)
}
return;
}
-
+
*y = 0;
-
+
/* Negative number require a two's complement conversion of the
- mantissa. */
+ mantissa. */
if (x[0])
{
*y = 0x0080;
-
+
i = ((int) x[1]) - 0x7f;
-
- /* Now add 1 to the inverted data to do the two's complement. */
+
+ /* Now add 1 to the inverted data to do the two's complement. */
if (mode != QFmode)
v = 4 + M;
else
}
v--;
}
-
+
/* The following is a special case. The C4X negative float requires
a zero in the high bit (because the format is (2 - x) x 2^m), so
if a one is in that bit, we have to shift left one to get rid
- of it. This only occurs if the number is -1 x 2^m. */
+ of it. This only occurs if the number is -1 x 2^m. */
if (x[M+1] & 0x8000)
{
/* This is the case of -1 x 2^m, we have to rid ourselves of the
- high sign bit and shift the exponent. */
+ high sign bit and shift the exponent. */
eshift(x, 1);
i--;
}
#endif
return;
}
-
+
y[0] |= ((i & 0xff) << 8);
-
+
eshift (x, 8);
-
+
y[0] |= x[M] & 0x7f;
y[1] = x[M + 1];
if (mode != QFmode)
TFMODE_NAN;
#else
#ifdef IEEE
-unsigned EMUSHORT TFbignan[8] =
+UEMUSHORT TFbignan[8] =
{0x7fff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff};
-unsigned EMUSHORT TFlittlenan[8] = {0, 0, 0, 0, 0, 0, 0x8000, 0xffff};
+UEMUSHORT TFlittlenan[8] = {0, 0, 0, 0, 0, 0, 0x8000, 0xffff};
#endif
#endif
XFMODE_NAN;
#else
#ifdef IEEE
-unsigned EMUSHORT XFbignan[6] =
+UEMUSHORT XFbignan[6] =
{0x7fff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff};
-unsigned EMUSHORT XFlittlenan[6] = {0, 0, 0, 0xc000, 0xffff, 0};
+UEMUSHORT XFlittlenan[6] = {0, 0, 0, 0xc000, 0xffff, 0};
#endif
#endif
DFMODE_NAN;
#else
#ifdef IEEE
-unsigned EMUSHORT DFbignan[4] = {0x7fff, 0xffff, 0xffff, 0xffff};
-unsigned EMUSHORT DFlittlenan[4] = {0, 0, 0, 0xfff8};
+UEMUSHORT DFbignan[4] = {0x7fff, 0xffff, 0xffff, 0xffff};
+UEMUSHORT DFlittlenan[4] = {0, 0, 0, 0xfff8};
#endif
#endif
SFMODE_NAN;
#else
#ifdef IEEE
-unsigned EMUSHORT SFbignan[2] = {0x7fff, 0xffff};
-unsigned EMUSHORT SFlittlenan[2] = {0, 0xffc0};
+UEMUSHORT SFbignan[2] = {0x7fff, 0xffff};
+UEMUSHORT SFlittlenan[2] = {0, 0xffc0};
#endif
#endif
+#ifdef NANS
static void
make_nan (nan, sign, mode)
- unsigned EMUSHORT *nan;
+ UEMUSHORT *nan;
int sign;
enum machine_mode mode;
{
int n;
- unsigned EMUSHORT *p;
+ UEMUSHORT *p;
switch (mode)
{
used like NaN's, but probably not in the same way as IEEE. */
#if !defined(DEC) && !defined(IBM) && !defined(C4X)
case TFmode:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
n = 8;
if (REAL_WORDS_BIG_ENDIAN)
p = TFbignan;
else
p = TFlittlenan;
break;
+#endif
+ /* FALLTHRU */
case XFmode:
n = 6;
abort ();
}
if (REAL_WORDS_BIG_ENDIAN)
- *nan++ = (sign << 15) | *p++;
+ *nan++ = (sign << 15) | (*p++ & 0x7fff);
while (--n != 0)
*nan++ = *p++;
if (! REAL_WORDS_BIG_ENDIAN)
- *nan = (sign << 15) | *p;
+ *nan = (sign << 15) | (*p & 0x7fff);
}
+#endif /* NANS */
/* This is the inverse of the function `etarsingle' invoked by
REAL_VALUE_TO_TARGET_SINGLE. */
long f;
{
REAL_VALUE_TYPE r;
- unsigned EMUSHORT s[2];
- unsigned EMUSHORT e[NE];
+ UEMUSHORT s[2];
+ UEMUSHORT e[NE];
/* Convert 32 bit integer to array of 16 bit pieces in target machine order.
This is the inverse operation to what the function `endian' does. */
if (REAL_WORDS_BIG_ENDIAN)
{
- s[0] = (unsigned EMUSHORT) (f >> 16);
- s[1] = (unsigned EMUSHORT) f;
+ s[0] = (UEMUSHORT) (f >> 16);
+ s[1] = (UEMUSHORT) f;
}
else
{
- s[0] = (unsigned EMUSHORT) f;
- s[1] = (unsigned EMUSHORT) (f >> 16);
+ s[0] = (UEMUSHORT) f;
+ s[1] = (UEMUSHORT) (f >> 16);
}
- /* Convert and promote the target float to E-type. */
+ /* Convert and promote the target float to E-type. */
e24toe (s, e);
- /* Output E-type to REAL_VALUE_TYPE. */
+ /* Output E-type to REAL_VALUE_TYPE. */
PUT_REAL (e, &r);
return r;
}
long d[];
{
REAL_VALUE_TYPE r;
- unsigned EMUSHORT s[4];
- unsigned EMUSHORT e[NE];
+ UEMUSHORT s[4];
+ UEMUSHORT e[NE];
/* Convert array of HOST_WIDE_INT to equivalent array of 16-bit pieces. */
if (REAL_WORDS_BIG_ENDIAN)
{
- s[0] = (unsigned EMUSHORT) (d[0] >> 16);
- s[1] = (unsigned EMUSHORT) d[0];
- s[2] = (unsigned EMUSHORT) (d[1] >> 16);
- s[3] = (unsigned EMUSHORT) d[1];
+ s[0] = (UEMUSHORT) (d[0] >> 16);
+ s[1] = (UEMUSHORT) d[0];
+ s[2] = (UEMUSHORT) (d[1] >> 16);
+ s[3] = (UEMUSHORT) d[1];
}
else
{
/* Target float words are little-endian. */
- s[0] = (unsigned EMUSHORT) d[0];
- s[1] = (unsigned EMUSHORT) (d[0] >> 16);
- s[2] = (unsigned EMUSHORT) d[1];
- s[3] = (unsigned EMUSHORT) (d[1] >> 16);
+ s[0] = (UEMUSHORT) d[0];
+ s[1] = (UEMUSHORT) (d[0] >> 16);
+ s[2] = (UEMUSHORT) d[1];
+ s[3] = (UEMUSHORT) (d[1] >> 16);
}
- /* Convert target double to E-type. */
+ /* Convert target double to E-type. */
e53toe (s, e);
- /* Output E-type to REAL_VALUE_TYPE. */
+ /* Output E-type to REAL_VALUE_TYPE. */
PUT_REAL (e, &r);
return r;
}
HOST_WIDE_INT f;
{
REAL_VALUE_TYPE r;
- unsigned EMUSHORT s[2];
- unsigned EMUSHORT e[NE];
+ UEMUSHORT s[2];
+ UEMUSHORT e[NE];
/* Convert 32 bit integer to array of 16 bit pieces in target machine order.
This is the inverse operation to what the function `endian' does. */
if (REAL_WORDS_BIG_ENDIAN)
{
- s[0] = (unsigned EMUSHORT) (f >> 16);
- s[1] = (unsigned EMUSHORT) f;
+ s[0] = (UEMUSHORT) (f >> 16);
+ s[1] = (UEMUSHORT) f;
}
else
{
- s[0] = (unsigned EMUSHORT) f;
- s[1] = (unsigned EMUSHORT) (f >> 16);
+ s[0] = (UEMUSHORT) f;
+ s[1] = (UEMUSHORT) (f >> 16);
}
/* Convert and promote the target float to E-type. */
e24toe (s, e);
HOST_WIDE_INT d[];
{
REAL_VALUE_TYPE r;
- unsigned EMUSHORT s[4];
- unsigned EMUSHORT e[NE];
+ UEMUSHORT s[4];
+ UEMUSHORT e[NE];
/* Convert array of HOST_WIDE_INT to equivalent array of 16-bit pieces. */
if (REAL_WORDS_BIG_ENDIAN)
{
- s[0] = (unsigned EMUSHORT) (d[0] >> 16);
- s[1] = (unsigned EMUSHORT) d[0];
#if HOST_BITS_PER_WIDE_INT == 32
- s[2] = (unsigned EMUSHORT) (d[1] >> 16);
- s[3] = (unsigned EMUSHORT) d[1];
+ s[0] = (UEMUSHORT) (d[0] >> 16);
+ s[1] = (UEMUSHORT) d[0];
+ s[2] = (UEMUSHORT) (d[1] >> 16);
+ s[3] = (UEMUSHORT) d[1];
#else
/* In this case the entire target double is contained in the
first array element. The second element of the input is
ignored. */
- s[2] = (unsigned EMUSHORT) (d[0] >> 48);
- s[3] = (unsigned EMUSHORT) (d[0] >> 32);
+ s[0] = (UEMUSHORT) (d[0] >> 48);
+ s[1] = (UEMUSHORT) (d[0] >> 32);
+ s[2] = (UEMUSHORT) (d[0] >> 16);
+ s[3] = (UEMUSHORT) d[0];
#endif
}
else
{
/* Target float words are little-endian. */
- s[0] = (unsigned EMUSHORT) d[0];
- s[1] = (unsigned EMUSHORT) (d[0] >> 16);
+ s[0] = (UEMUSHORT) d[0];
+ s[1] = (UEMUSHORT) (d[0] >> 16);
#if HOST_BITS_PER_WIDE_INT == 32
- s[2] = (unsigned EMUSHORT) d[1];
- s[3] = (unsigned EMUSHORT) (d[1] >> 16);
+ s[2] = (UEMUSHORT) d[1];
+ s[3] = (UEMUSHORT) (d[1] >> 16);
#else
- s[2] = (unsigned EMUSHORT) (d[0] >> 32);
- s[3] = (unsigned EMUSHORT) (d[0] >> 48);
+ s[2] = (UEMUSHORT) (d[0] >> 32);
+ s[3] = (UEMUSHORT) (d[0] >> 48);
#endif
}
/* Convert target double to E-type. */
static void
uditoe (di, e)
- unsigned EMUSHORT *di; /* Address of the 64-bit int. */
- unsigned EMUSHORT *e;
+ UEMUSHORT *di; /* Address of the 64-bit int. */
+ UEMUSHORT *e;
{
- unsigned EMUSHORT yi[NI];
+ UEMUSHORT yi[NI];
int k;
ecleaz (yi);
if ((k = enormlz (yi)) > NBITS)/* normalize the significand */
ecleaz (yi); /* it was zero */
else
- yi[E] -= (unsigned EMUSHORT) k;/* subtract shift count from exponent */
+ yi[E] -= (UEMUSHORT) k;/* subtract shift count from exponent */
emovo (yi, e);
}
static void
ditoe (di, e)
- unsigned EMUSHORT *di; /* Address of the 64-bit int. */
- unsigned EMUSHORT *e;
+ UEMUSHORT *di; /* Address of the 64-bit int. */
+ UEMUSHORT *e;
{
unsigned EMULONG acc;
- unsigned EMUSHORT yi[NI];
- unsigned EMUSHORT carry;
+ UEMUSHORT yi[NI];
+ UEMUSHORT carry;
int k, sign;
ecleaz (yi);
if ((k = enormlz (yi)) > NBITS)/* normalize the significand */
ecleaz (yi); /* it was zero */
else
- yi[E] -= (unsigned EMUSHORT) k;/* subtract shift count from exponent */
+ yi[E] -= (UEMUSHORT) k;/* subtract shift count from exponent */
emovo (yi, e);
if (sign)
eneg (e);
/* Convert e-type to unsigned 64-bit int. */
-static void
+static void
etoudi (x, i)
- unsigned EMUSHORT *x;
- unsigned EMUSHORT *i;
+ UEMUSHORT *x;
+ UEMUSHORT *i;
{
- unsigned EMUSHORT xi[NI];
+ UEMUSHORT xi[NI];
int j, k;
emovi (x, xi);
/* Convert e-type to signed 64-bit int. */
-static void
+static void
etodi (x, i)
- unsigned EMUSHORT *x;
- unsigned EMUSHORT *i;
+ UEMUSHORT *x;
+ UEMUSHORT *i;
{
unsigned EMULONG acc;
- unsigned EMUSHORT xi[NI];
- unsigned EMUSHORT carry;
- unsigned EMUSHORT *isave;
+ UEMUSHORT xi[NI];
+ UEMUSHORT carry;
+ UEMUSHORT *isave;
int j, k;
emovi (x, xi);
static int esqinited = 0;
static unsigned short sqrndbit[NI];
-static void
+static void
esqrt (x, y)
- unsigned EMUSHORT *x, *y;
+ UEMUSHORT *x, *y;
{
- unsigned EMUSHORT temp[NI], num[NI], sq[NI], xx[NI];
+ UEMUSHORT temp[NI], num[NI], sq[NI], xx[NI];
EMULONG m, exp;
int i, j, k, n, nlups;
floating point mode. The mode can hold an integer value
that many bits wide, without losing any bits. */
-int
+unsigned int
significand_size (mode)
enum machine_mode mode;
{
switch (GET_MODE_BITSIZE (mode))
{
case 32:
-
+
#if TARGET_FLOAT_FORMAT == C4X_FLOAT_FORMAT
return 56;
#endif
case 96:
return 64;
+
case 128:
+#if (INTEL_EXTENDED_IEEE_FORMAT == 0)
return 113;
+#else
+ return 64;
+#endif
default:
abort ();
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