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This commit is contained in:
Roland McGrath
1991-06-12 18:33:01 +00:00
parent c8b2bec86f
commit 9a977fa060
9 changed files with 595 additions and 0 deletions
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34
sysdeps/am29k/ffs.c Normal file
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/* ffs -- find first set bit in a word, counted from least significant end.
For Amd 290x0.
Copyright (C) 1991 Free Software Foundation, Inc.
Contributed by Torbjorn Granlund (tege@sics.se).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <bstring.h>
#undef ffs
int
DEFUN(ffs, (x), int x)
{
int cnt;
asm ("clz %0,%1" : "=r" (cnt) : "r" (x & -x));
return 32 - cnt;
}

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sysdeps/m68k/ffs.c Normal file
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/* ffs -- find first set bit in a word, counted from least significant end.
For mc68020, mc68030, mc68040.
Copyright (C) 1991 Free Software Foundation, Inc.
Contributed by Torbjorn Granlund (tege@sics.se).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <bstring.h>
#undef ffs
#if defined(__mc68020__) || defined(mc68020)
int
DEFUN(ffs, (x), int x)
{
int cnt;
asm("bfffo %1{#0:#0},%0" : "=d" (cnt) : "rm" (x & -x));
return 32 - cnt;
}
#else
#include <sysdeps/generic/ffs.c>
#endif

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sysdeps/m68k/fpu/__math.h Normal file
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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifdef __GNUC__
/* IGNORE($ */
#ifdef __STDC__
/* $) IFANSI($ */
#define __m81_s(x) #x
#define __m81_ul(x) __ ## x
/* $) IGNORE($ */
#else
/* $) IFTRAD($ */
#define __m81_s(x) "x"
#define __m81_ul(x) __/**/x
/* $) IGNORE($ */
#endif
/* $) */
#ifdef __NO_MATH_INLINES
#define __m81_u(x) __m81_ul(x)
#else
#define __m81_u(x) x
#define __MATH_INLINES 1
#endif
#define __inline_mathop2(func, op) \
extern __inline __const double \
__m81_u(func)(double __mathop_x) \
{ \
double __result; \
__asm("f" __m81_s(op) "%.x %1, %0" : "=f" (__result) : "f" (__mathop_x)); \
return __result; \
}
#define __inline_mathop(op) __inline_mathop2(op, op)
__inline_mathop(acos)
__inline_mathop(asin)
__inline_mathop(atan)
__inline_mathop(cos)
__inline_mathop(sin)
__inline_mathop(tan)
__inline_mathop(cosh)
__inline_mathop(sinh)
__inline_mathop(tanh)
__inline_mathop2(exp, etox)
__inline_mathop2(fabs, abs)
__inline_mathop(log10)
__inline_mathop2(log, logn)
__inline_mathop2(floor, intrz)
__inline_mathop(sqrt)
#ifdef __USE_MISC
__inline_mathop2(rint, int)
__inline_mathop2(expm1, etoxm1)
__inline_mathop2(log1p, lognp1)
__inline_mathop(atanh)
#endif
extern __inline __const double
__m81_u(__drem)(double __x, double __y)
{
double __result;
__asm("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
return __result;
}
extern __inline __const double
__m81_u(__scalb)(double __x, int __n)
{
double __result;
if (__x == 0.0)
__result = __x;
else
__asm("fscale%.l %1, %0" : "=f" (__result) : "g" (__n), "0" (__x));
return __result;
}
extern __inline __const double
__m81_u(ldexp)(double __x, int __e)
{
double __result;
double __double_e = (double) __e;
__asm("fscale%.x %1, %0" : "=f" (__result) : "f" (__double_e), "0" (__x));
return __result;
}
extern __inline __const double
__m81_u(fmod)(double __x, double __y)
{
double __result;
__asm("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
return __result;
}
extern __inline double
__m81_u(frexp)(double __value, int *__expptr)
{
double __mantissa, __exponent;
__asm("fgetexp%.x %1, %0" : "=f" (__exponent) : "f" (__value));
__asm("fgetman%.x %1, %0" : "=f" (__mantissa) : "f" (__value));
*__expptr = (int) __exponent;
return __mantissa;
}
extern __inline __const double
__m81_u(pow)(double __x, double __y)
{
double __result;
if (__y == 0.0 || __x == 1.0)
__result = 1.0;
else if (__y == 1.0)
__result = __x;
else if (__y == 2.0)
__result = __x * __x;
else if (__x == 10.0)
__asm("ftentox%.x %1, %0" : "=f" (__result) : "f" (__y));
else if (__x == 2.0)
__asm("ftwotox%.x %1, %0" : "=f" (__result) : "f" (__y));
else
__result = __m81_u(exp)(__y * __m81_u(log)(__x));
return __result;
}
extern __inline __const double
__m81_u(ceil)(double __x)
{
double __result;
unsigned long int __ctrl_reg;
__asm("fmove%.l fpcr, %0" : "=g" (__ctrl_reg));
/* Set rounding towards positive infinity. */
__asm("fmove%.l %0, fpcr" : /* No outputs. */ : "g" (__ctrl_reg | 0x30));
/* Convert X to an integer, using +Inf rounding. */
__asm("fint%.x %1, %0" : "=f" (__result) : "f" (__x));
/* Restore the previous rounding mode. */
__asm("fmove%.l %0, fpcr" : /* No outputs. */ : "g" (__ctrl_reg));
return __result;
}
extern __inline double
__m81_u(modf)(double __value, double *__iptr)
{
double __modf_int = __m81_u(floor)(__value);
*__iptr = __modf_int;
return __value - __modf_int;
}
extern __inline int
__m81_u(__isinf)(double __value)
{
/* There is no branch-condition for infinity,
so we must extract and examine the condition codes manually. */
unsigned long int __fpsr;
__asm("ftst%.x %1\n"
"fmove%.l fpsr, %0" : "=g" (__fpsr) : "f" (__value));
return (__fpsr & (2 << (3 * 8))) ? (__value < 0 ? -1 : 1) : 0;
}
extern __inline int
__m81_u(__isnan)(double __value)
{
char __result;
__asm("ftst%.x %1\n"
"fsun %0" : "=g" (__result) : "f" (__value));
return __result;
}
#endif /* GCC. */

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sysdeps/m68k/fpu/atan2.c Normal file
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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <math.h>
static CONST double
PIo4 = 7.8539816339744827900E-1 , /*Hex 2^ -1 * 1.921FB54442D18 */
PIo2 = 1.5707963267948965580E0 , /*Hex 2^ 0 * 1.921FB54442D18 */
PI = 3.1415926535897931160E0 ; /*Hex 2^ 1 * 1.921FB54442D18 */
double
DEFUN(atan2, (y, x), double y AND double x)
{
static CONST double one = 1.0, zero = 0.0;
double signx, signy;
double pi;
if (__isnan(x))
return x;
if (__isnan(y))
return y;
signy = __copysign(one, y);
signx = __copysign(one, x);
asm("fmovecr%.x %1, %0" : "=f" (pi) : "i" (0));
if (y == zero)
return signx == one ? y : __copysign(pi, signy);
if (x == zero)
return __copysign(PIo2, signy);
if (__isinf(x))
{
if (__isinf(y))
return __copysign(signx == one ? PIo4 : 3 * PIo4, signy);
else
return __copysign(signx == one ? zero : pi, signy);
}
if (__isinf(y))
return __copysign(PIo2, signy);
y = fabs(y);
if (x < 0.0)
/* X is negative. */
return __copysign(pi - atan(y / -x), signy);
return __copysign(atan(y / x), signy);
}

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sysdeps/m68k/fpu/logb.c Normal file
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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <math.h>
/* Return the base 2 signed integral exponent of X. */
double
DEFUN(__logb, (x), double x)
{
if (__isnan(x))
return x;
if (__isinf(x))
return fabs(x);
if (x == 0.0)
asm("flog2%.x %0" : "=f" (x) : "0" (x));
else
asm("fgetexp%.x %0" : "=f" (x) : "0" (x));
return x;
}

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sysdeps/m68k/fpu/switch/68881-sw.h Normal file
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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifndef _68881_SWITCH_H
#define _68881_SWITCH_H 1
/* This is the format of the data at the code label for a function which
wants to switch depending on whether or not a 68881 is present.
Initially, `insn' is a `jsr' instruction, and `target' is __68881_switch.
The first time such a function is called, __68881_switch determines whether
or not a 68881 is present, and modifies the function accordingly.
Then `insn' is a `jmp' instruction, and `target' is the value of `fpu'
if there is 68881, or the value of `soft' if not. */
struct switch_caller
{
unsigned short int insn; /* The `jsr' or `jmp' instruction. */
PTR target; /* The target of the instruction. */
PTR soft; /* The address of the soft function. */
PTR fpu; /* The address of the 68881 function. */
};
/* These are opcodes (values for `insn', above) for `jmp' and `jsr'
instructions, respectively, to 32-bit absolute addresses. */
#define JMP 0x4ef9
#define JSR 0x4eb9
/* Function to determine whether or not a 68881 is available,
and modify its caller (which must be a `struct switch_caller', above,
in data space) to use the appropriate version. */
extern void EXFUN(__68881_switch, (int __dummy));
#ifdef __STDC__
#define __paste(a, b) a ## b
#else
#define __paste(a, b) a/**/b
#endif
/* Define FUNCTION as a `struct switch_caller' which will call
`__FUNCTION_68881' if a 68881 is present, and `__FUNCTION_soft' if not.
#define switching_function(FUNCTION) \
struct switch_caller FUNCTION = \
{ \
JSR, (PTR) __68881_switch, \
__paste(__paste(__, FUNCTION), _soft), \
__paste(__paste(__, FUNCTION), _68881) \
}
#endif /* 68881-switch.h */

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sysdeps/m68k/fpu/switch/switch.c Normal file
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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <signal.h>
#include <68881-switch.h>
/* The signal that is sent when a 68881 instruction
is executed and there is no 68881. */
#ifndef TRAPSIG
#define TRAPSIG SIGILL
#endif
/* Nonzero if we have determined whether or not there is a 68881. */
static int tested_fpu = 0;
/* Nonzero if we have a 68881. */
static int have_fpu;
/* Signal handler for the trap that happens if we don't have a 68881. */
static void
DEFUN(trap, (sig), int sig)
{
have_fpu = 0;
}
/* This function is called by functions that want to switch.
The calling function must be a `struct switch_caller' in data space.
It determines whether a 68881 is present, and modifies its caller
to be a static jump to either the 68881 version or the soft version.
It then returns into the function it has chosen to do the work. */
void
DEFUN(__68881_switch, (dummy), int dummy)
{
PTR *return_address_location = &((PTR *) &dummy)[-1];
struct switch_caller *CONST caller
= (struct switch_caller *) (((short int *) *return_address_location) - 1);
if (!tested_fpu)
{
/* Figure out whether or not we have a 68881. */
__sighandler_t handler = signal(TRAPSIG, trap);
if (handler == SIG_ERR)
/* We can't figure it out, so assume we don't have a 68881.
This assumption will never cause us any problems other than
lost performance, while the reverse assumption could cause
the program to crash. */
have_fpu = 0;
else
{
/* We set `have_fpu' to nonzero, and then execute a 68881
no-op instruction. If we have a 68881, this will do nothing.
If we don't have one, this will trap and the signal handler
will clear `have_fpu'. */
have_fpu = 1;
asm("fnop");
/* Restore the old signal handler. */
(void) signal(TRAPSIG, handler);
}
/* Say that we've tested for a 68881, so we only do it once. */
tested_fpu = 1;
}
/* Modify the caller to be a jump to the appropriate address. */
caller->insn = JMP;
caller->target = have_fpu ? caller->fpu : caller->soft;
/* Make the address we will return to be the target we have chosen.
Our return will match the `jsr' done by the caller we have
just modified, and it will be just as if that had instead
been a `jmp' to the new target. */
*return_address_location = caller->target;
}

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/* ffs -- find first set bit in a word, counted from least significant end.
For Motorola 88000.
Copyright (C) 1991 Free Software Foundation, Inc.
Contributed by Torbjorn Granlund (tege@sics.se).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <bstring.h>
#undef ffs
int
DEFUN(ffs, (x), int x)
{
int cnt;
if (x == 0)
return 0;
asm ("ff1 %0,%1" : "=r" (cnt) : "r" (x & -x));
return cnt + 1;
}

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sysdeps/rs6000/ffs.c Normal file
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/* ffs -- find first set bit in a word, counted from least significant end.
For IBM rs6000.
Copyright (C) 1991 Free Software Foundation, Inc.
Contributed by Torbjorn Granlund (tege@sics.se).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <bstring.h>
#undef ffs
int
DEFUN(ffs, (x), int x)
{
int cnt;
asm ("cntlz %0,%1" : "=r" (cnt) : "r" (x & -x));
return 32 - cnt;
}