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|
/* Definitions of inline math functions implemented by the m68881/2.
Copyright (C) 1991-2020 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#ifndef _MATH_H
# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
#endif
#ifndef __extern_inline
# define __MATH_INLINE __inline
#else
# define __MATH_INLINE __extern_inline
#endif
#ifdef __GNUC__
#if (!defined __NO_MATH_INLINES && defined __OPTIMIZE__) \
|| defined __LIBC_INTERNAL_MATH_INLINES
#ifdef __LIBC_INTERNAL_MATH_INLINES
/* This is used when defining the functions themselves. Define them with
__ names, and with `static inline' instead of `extern inline' so the
bodies will always be used, never an external function call.
Note: GCC 6 objects to __attribute__ ((__leaf__)) on static functions. */
# define __m81_u(x) __CONCAT(__,x)
# define __m81_inline static __inline
# define __m81_nth(fn) __NTHNL (fn)
#else
# define __m81_u(x) x
# define __m81_inline __MATH_INLINE
# define __m81_nth(fn) __NTH (fn)
# define __M81_MATH_INLINES 1
#endif
/* Define a math function. */
#define __m81_defun(rettype, func, args, attrs) \
__m81_inline rettype attrs \
__m81_nth (__m81_u(func) args)
/* Define the three variants of a math function that has a direct
implementation in the m68k fpu. FUNC is the name for C (which will be
suffixed with f and l for the float and long double version, resp). OP
is the name of the fpu operation (without leading f). */
#ifdef __USE_ISOC99
# define __inline_mathop(func, op, attrs) \
__inline_mathop1(double, func, op, attrs) \
__inline_mathop1(float, __CONCAT(func,f), op, attrs) \
__inline_mathop1(long double, __CONCAT(func,l), op, attrs)
#else
# define __inline_mathop(func, op, attrs) \
__inline_mathop1(double, func, op, attrs)
#endif
#define __inline_mathop1(float_type,func, op, attrs) \
__m81_defun (float_type, func, (float_type __mathop_x), attrs) \
{ \
float_type __result; \
__asm __volatile__ ("f" __STRING(op) "%.x %1, %0" \
: "=f" (__result) : "f" (__mathop_x)); \
return __result; \
}
__inline_mathop(__atan, atan,)
__inline_mathop(__cos, cos,)
__inline_mathop(__sin, sin,)
__inline_mathop(__tan, tan,)
__inline_mathop(__tanh, tanh,)
__inline_mathop(__fabs, abs, __attribute__ ((__const__)))
#if defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
__inline_mathop(__rint, int,)
__inline_mathop(__expm1, etoxm1,)
__inline_mathop(__log1p, lognp1,)
#endif
#ifdef __USE_MISC
__inline_mathop(__significand, getman,)
#endif
#ifdef __USE_ISOC99
__inline_mathop(__trunc, intrz, __attribute__ ((__const__)))
#endif
#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
__inline_mathop(atan, atan,)
__inline_mathop(tanh, tanh,)
# if defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
__inline_mathop(rint, int,)
__inline_mathop(log1p, lognp1,)
# endif
# ifdef __USE_MISC
__inline_mathop(significand, getman,)
# endif
# ifdef __USE_ISOC99
__inline_mathop(trunc, intrz, __attribute__ ((__const__)))
# endif
#endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
/* This macro contains the definition for the rest of the inline
functions, using FLOAT_TYPE as the domain type and M as a macro
that adds the suffix for the function names. */
#define __inline_functions(float_type, m) \
__m81_defun (float_type, m(__floor), (float_type __x), \
__attribute__ ((__const__))) \
{ \
float_type __result; \
unsigned long int __ctrl_reg; \
__asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \
/* Set rounding towards negative infinity. */ \
__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
: "dmi" ((__ctrl_reg & ~0x10) | 0x20)); \
/* Convert X to an integer, using -Inf rounding. */ \
__asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \
/* Restore the previous rounding mode. */ \
__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
: "dmi" (__ctrl_reg)); \
return __result; \
} \
\
__m81_defun (float_type, m(__ceil), (float_type __x), \
__attribute__ ((__const__))) \
{ \
float_type __result; \
unsigned long int __ctrl_reg; \
__asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \
/* Set rounding towards positive infinity. */ \
__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
: "dmi" (__ctrl_reg | 0x30)); \
/* Convert X to an integer, using +Inf rounding. */ \
__asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \
/* Restore the previous rounding mode. */ \
__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
: "dmi" (__ctrl_reg)); \
return __result; \
}
#define __CONCAT_d(arg) arg
#define __CONCAT_f(arg) arg ## f
#define __CONCAT_l(arg) arg ## l
__inline_functions(double, __CONCAT_d)
#ifdef __USE_ISOC99
__inline_functions(float, __CONCAT_f)
__inline_functions(long double, __CONCAT_l)
#endif
#undef __inline_functions
#ifdef __USE_MISC
# define __inline_functions(float_type, m) \
__m81_defun (int, m(__isinf), (float_type __value), \
__attribute__ ((__const__))) \
{ \
/* 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" : "=dm" (__fpsr) : "f" (__value)); \
return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0; \
} \
\
__m81_defun (int, m(__finite), (float_type __value), \
__attribute__ ((__const__))) \
{ \
/* 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" : "=dm" (__fpsr) : "f" (__value)); \
return (__fpsr & (3 << 24)) == 0; \
} \
\
__m81_defun (float_type, m(__scalbn), \
(float_type __x, int __n),) \
{ \
float_type __result; \
__asm __volatile__ ("fscale%.l %1, %0" : "=f" (__result) \
: "dmi" (__n), "0" (__x)); \
return __result; \
}
__inline_functions(double, __CONCAT_d)
__inline_functions(float, __CONCAT_f)
__inline_functions(long double, __CONCAT_l)
# undef __inline_functions
#endif /* Use misc. */
#if defined __USE_MISC || defined __USE_XOPEN
# define __inline_functions(float_type, m) \
__m81_defun (int, m(__isnan), (float_type __value), \
__attribute__ ((__const__))) \
{ \
char __result; \
__asm ("ftst%.x %1\n" \
"fsun %0" : "=dm" (__result) : "f" (__value)); \
return __result; \
}
__inline_functions(double, __CONCAT_d)
# ifdef __USE_MISC
__inline_functions(float, __CONCAT_f)
__inline_functions(long double, __CONCAT_l)
# endif
# undef __inline_functions
#endif
#ifdef __USE_ISOC99
# define __inline_functions(float_type, m) \
__m81_defun (float_type, m(__scalbln), \
(float_type __x, long int __n),) \
{ \
return m(__scalbn) (__x, __n); \
} \
\
__m81_defun (float_type, m(__nearbyint), (float_type __x),) \
{ \
float_type __result; \
unsigned long int __ctrl_reg; \
__asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \
/* Temporarily disable the inexact exception. */ \
__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
: "dmi" (__ctrl_reg & ~0x200)); \
__asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \
__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
: "dmi" (__ctrl_reg)); \
return __result; \
} \
\
__m81_defun (long int, m(__lrint), (float_type __x),) \
{ \
long int __result; \
__asm __volatile__ ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x)); \
return __result; \
}
__inline_functions (double, __CONCAT_d)
__inline_functions (float, __CONCAT_f)
__inline_functions (long double, __CONCAT_l)
# undef __inline_functions
#endif /* Use ISO C9x */
#ifdef __USE_GNU
# define __inline_functions(float_type, m) \
__m81_inline void \
__m81_nth (__m81_u(m(__sincos)) \
(float_type __x, float_type *__sinx, float_type *__cosx)) \
{ \
__asm __volatile__ ("fsincos%.x %2,%1:%0" \
: "=f" (*__sinx), "=f" (*__cosx) : "f" (__x)); \
}
__inline_functions (double, __CONCAT_d)
__inline_functions (float, __CONCAT_f)
__inline_functions (long double, __CONCAT_l)
# undef __inline_functions
#endif
#undef __CONCAT_d
#undef __CONCAT_f
#undef __CONCAT_l
#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
/* Define inline versions of the user visible functions. */
# define __inline_forward_c(rettype, name, args1, args2) \
__MATH_INLINE rettype __attribute__((__const__)) \
__NTH (name args1) \
{ \
return __CONCAT(__,name) args2; \
}
# define __inline_forward(rettype, name, args1, args2) \
__MATH_INLINE rettype __NTH (name args1) \
{ \
return __CONCAT(__,name) args2; \
}
__inline_forward_c(double,floor, (double __x), (__x))
__inline_forward_c(double,ceil, (double __x), (__x))
# ifdef __USE_MISC
# ifndef __USE_ISOC99 /* Conflict with macro of same name. */
__inline_forward_c(int,isinf, (double __value), (__value))
# endif
__inline_forward_c(int,finite, (double __value), (__value))
__inline_forward(double,scalbn, (double __x, int __n), (__x, __n))
# endif
# if defined __USE_MISC || defined __USE_XOPEN
# ifndef __USE_ISOC99 /* Conflict with macro of same name. */
__inline_forward_c(int,isnan, (double __value), (__value))
# endif
# endif
# ifdef __USE_ISOC99
__inline_forward(double,scalbln, (double __x, long int __n), (__x, __n))
__inline_forward(double,nearbyint, (double __value), (__value))
__inline_forward(long int,lrint, (double __value), (__value))
# endif
# ifdef __USE_GNU
__inline_forward(void,sincos, (double __x, double *__sinx, double *__cosx),
(__x, __sinx, __cosx))
# endif
# ifdef __USE_ISOC99
__inline_forward_c(float,floorf, (float __x), (__x))
__inline_forward_c(float,ceilf, (float __x), (__x))
# ifdef __USE_MISC
__inline_forward_c(int,isinff, (float __value), (__value))
__inline_forward_c(int,finitef, (float __value), (__value))
__inline_forward(float,scalbnf, (float __x, int __n), (__x, __n))
__inline_forward_c(int,isnanf, (float __value), (__value))
# endif
# ifdef __USE_ISOC99
__inline_forward(float,scalblnf, (float __x, long int __n), (__x, __n))
__inline_forward(float,nearbyintf, (float __value), (__value))
__inline_forward(long int,lrintf, (float __value), (__value))
# endif
# ifdef __USE_GNU
__inline_forward(void,sincosf, (float __x, float *__sinx, float *__cosx),
(__x, __sinx, __cosx))
# endif
__inline_forward_c(long double,floorl, (long double __x), (__x))
__inline_forward_c(long double,ceill, (long double __x), (__x))
# ifdef __USE_MISC
__inline_forward_c(int,isinfl, (long double __value), (__value))
__inline_forward_c(int,finitel, (long double __value), (__value))
__inline_forward(long double,scalbnl, (long double __x, int __n), (__x, __n))
__inline_forward_c(int,isnanl, (long double __value), (__value))
# endif
# ifdef __USE_ISOC99
__inline_forward(long double,scalblnl, (long double __x, long int __n),
(__x, __n))
__inline_forward(long double,nearbyintl, (long double __value), (__value))
__inline_forward(long int,lrintl, (long double __value), (__value))
# endif
# ifdef __USE_GNU
__inline_forward(void,sincosl,
(long double __x, long double *__sinx, long double *__cosx),
(__x, __sinx, __cosx))
# endif
#endif /* Use misc or ISO C99 */
#undef __inline_forward
#undef __inline_forward_c
#endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
#endif
#endif /* GCC. */
|
