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688903eb3e
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379 lines
12 KiB
C
379 lines
12 KiB
C
/* Definitions of inline math functions implemented by the m68881/2.
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Copyright (C) 1991-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _MATH_H
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# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
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#endif
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#ifndef __extern_inline
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# define __MATH_INLINE __inline
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#else
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# define __MATH_INLINE __extern_inline
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#endif
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#ifdef __GNUC__
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#if (!defined __NO_MATH_INLINES && defined __OPTIMIZE__) \
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|| defined __LIBC_INTERNAL_MATH_INLINES
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#ifdef __LIBC_INTERNAL_MATH_INLINES
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/* This is used when defining the functions themselves. Define them with
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__ names, and with `static inline' instead of `extern inline' so the
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bodies will always be used, never an external function call.
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Note: GCC 6 objects to __attribute__ ((__leaf__)) on static functions. */
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# define __m81_u(x) __CONCAT(__,x)
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# define __m81_inline static __inline
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# define __m81_nth(fn) __NTHNL (fn)
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#else
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# define __m81_u(x) x
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# define __m81_inline __MATH_INLINE
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# define __m81_nth(fn) __NTH (fn)
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# define __M81_MATH_INLINES 1
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#endif
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/* Define a math function. */
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#define __m81_defun(rettype, func, args, attrs) \
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__m81_inline rettype attrs \
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__m81_nth (__m81_u(func) args)
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/* Define the three variants of a math function that has a direct
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implementation in the m68k fpu. FUNC is the name for C (which will be
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suffixed with f and l for the float and long double version, resp). OP
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is the name of the fpu operation (without leading f). */
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#ifdef __USE_ISOC99
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# define __inline_mathop(func, op, attrs) \
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__inline_mathop1(double, func, op, attrs) \
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__inline_mathop1(float, __CONCAT(func,f), op, attrs) \
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__inline_mathop1(long double, __CONCAT(func,l), op, attrs)
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#else
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# define __inline_mathop(func, op, attrs) \
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__inline_mathop1(double, func, op, attrs)
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#endif
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#define __inline_mathop1(float_type,func, op, attrs) \
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__m81_defun (float_type, func, (float_type __mathop_x), attrs) \
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{ \
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float_type __result; \
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__asm __volatile__ ("f" __STRING(op) "%.x %1, %0" \
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: "=f" (__result) : "f" (__mathop_x)); \
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return __result; \
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}
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__inline_mathop(__atan, atan,)
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__inline_mathop(__cos, cos,)
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__inline_mathop(__sin, sin,)
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__inline_mathop(__tan, tan,)
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__inline_mathop(__tanh, tanh,)
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__inline_mathop(__fabs, abs, __attribute__ ((__const__)))
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#if defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
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__inline_mathop(__rint, int,)
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__inline_mathop(__expm1, etoxm1,)
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__inline_mathop(__log1p, lognp1,)
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#endif
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#ifdef __USE_MISC
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__inline_mathop(__significand, getman,)
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#endif
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#ifdef __USE_ISOC99
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__inline_mathop(__trunc, intrz, __attribute__ ((__const__)))
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#endif
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#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
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__inline_mathop(atan, atan,)
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__inline_mathop(tanh, tanh,)
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# if defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
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__inline_mathop(rint, int,)
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__inline_mathop(log1p, lognp1,)
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# endif
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# ifdef __USE_MISC
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__inline_mathop(significand, getman,)
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# endif
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# ifdef __USE_ISOC99
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__inline_mathop(trunc, intrz, __attribute__ ((__const__)))
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# endif
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#endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
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/* This macro contains the definition for the rest of the inline
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functions, using FLOAT_TYPE as the domain type and M as a macro
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that adds the suffix for the function names. */
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#define __inline_functions(float_type, m) \
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__m81_defun (float_type, m(__floor), (float_type __x), \
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__attribute__ ((__const__))) \
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{ \
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float_type __result; \
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unsigned long int __ctrl_reg; \
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__asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \
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/* Set rounding towards negative infinity. */ \
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__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
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: "dmi" ((__ctrl_reg & ~0x10) | 0x20)); \
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/* Convert X to an integer, using -Inf rounding. */ \
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__asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \
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/* Restore the previous rounding mode. */ \
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__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
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: "dmi" (__ctrl_reg)); \
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return __result; \
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} \
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\
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__m81_defun (float_type, m(__ceil), (float_type __x), \
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__attribute__ ((__const__))) \
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{ \
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float_type __result; \
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unsigned long int __ctrl_reg; \
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__asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \
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/* Set rounding towards positive infinity. */ \
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__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
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: "dmi" (__ctrl_reg | 0x30)); \
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/* Convert X to an integer, using +Inf rounding. */ \
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__asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \
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/* Restore the previous rounding mode. */ \
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__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
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: "dmi" (__ctrl_reg)); \
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return __result; \
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}
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#define __CONCAT_d(arg) arg
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#define __CONCAT_f(arg) arg ## f
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#define __CONCAT_l(arg) arg ## l
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__inline_functions(double, __CONCAT_d)
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#ifdef __USE_ISOC99
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__inline_functions(float, __CONCAT_f)
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__inline_functions(long double, __CONCAT_l)
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#endif
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#undef __inline_functions
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#ifdef __USE_MISC
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# define __inline_functions(float_type, m) \
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__m81_defun (int, m(__isinf), (float_type __value), \
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__attribute__ ((__const__))) \
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{ \
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/* There is no branch-condition for infinity, \
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so we must extract and examine the condition codes manually. */ \
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unsigned long int __fpsr; \
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__asm ("ftst%.x %1\n" \
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"fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \
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return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0; \
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} \
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\
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__m81_defun (int, m(__finite), (float_type __value), \
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__attribute__ ((__const__))) \
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{ \
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/* There is no branch-condition for infinity, so we must extract and \
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examine the condition codes manually. */ \
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unsigned long int __fpsr; \
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__asm ("ftst%.x %1\n" \
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"fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \
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return (__fpsr & (3 << 24)) == 0; \
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} \
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\
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__m81_defun (float_type, m(__scalbn), \
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(float_type __x, int __n),) \
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{ \
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float_type __result; \
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__asm __volatile__ ("fscale%.l %1, %0" : "=f" (__result) \
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: "dmi" (__n), "0" (__x)); \
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return __result; \
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}
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__inline_functions(double, __CONCAT_d)
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__inline_functions(float, __CONCAT_f)
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__inline_functions(long double, __CONCAT_l)
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# undef __inline_functions
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#endif /* Use misc. */
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#if defined __USE_MISC || defined __USE_XOPEN
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# define __inline_functions(float_type, m) \
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__m81_defun (int, m(__isnan), (float_type __value), \
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__attribute__ ((__const__))) \
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{ \
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char __result; \
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__asm ("ftst%.x %1\n" \
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"fsun %0" : "=dm" (__result) : "f" (__value)); \
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return __result; \
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}
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__inline_functions(double, __CONCAT_d)
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# ifdef __USE_MISC
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__inline_functions(float, __CONCAT_f)
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__inline_functions(long double, __CONCAT_l)
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# endif
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# undef __inline_functions
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#endif
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#ifdef __USE_ISOC99
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# define __inline_functions(float_type, m) \
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__m81_defun (float_type, m(__scalbln), \
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(float_type __x, long int __n),) \
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{ \
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return m(__scalbn) (__x, __n); \
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} \
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\
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__m81_defun (float_type, m(__nearbyint), (float_type __x),) \
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{ \
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float_type __result; \
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unsigned long int __ctrl_reg; \
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__asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \
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/* Temporarily disable the inexact exception. */ \
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__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
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: "dmi" (__ctrl_reg & ~0x200)); \
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__asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \
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__asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \
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: "dmi" (__ctrl_reg)); \
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return __result; \
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} \
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\
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__m81_defun (long int, m(__lrint), (float_type __x),) \
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{ \
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long int __result; \
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__asm __volatile__ ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x)); \
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return __result; \
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}
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__inline_functions (double, __CONCAT_d)
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__inline_functions (float, __CONCAT_f)
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__inline_functions (long double, __CONCAT_l)
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# undef __inline_functions
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#endif /* Use ISO C9x */
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#ifdef __USE_GNU
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# define __inline_functions(float_type, m) \
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__m81_inline void \
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__m81_nth (__m81_u(m(__sincos)) \
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(float_type __x, float_type *__sinx, float_type *__cosx)) \
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{ \
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__asm __volatile__ ("fsincos%.x %2,%1:%0" \
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: "=f" (*__sinx), "=f" (*__cosx) : "f" (__x)); \
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}
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__inline_functions (double, __CONCAT_d)
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__inline_functions (float, __CONCAT_f)
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__inline_functions (long double, __CONCAT_l)
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# undef __inline_functions
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#endif
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#undef __CONCAT_d
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#undef __CONCAT_f
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#undef __CONCAT_l
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#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
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/* Define inline versions of the user visible functions. */
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# define __inline_forward_c(rettype, name, args1, args2) \
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__MATH_INLINE rettype __attribute__((__const__)) \
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__NTH (name args1) \
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{ \
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return __CONCAT(__,name) args2; \
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}
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# define __inline_forward(rettype, name, args1, args2) \
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__MATH_INLINE rettype __NTH (name args1) \
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{ \
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return __CONCAT(__,name) args2; \
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}
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__inline_forward_c(double,floor, (double __x), (__x))
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__inline_forward_c(double,ceil, (double __x), (__x))
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# ifdef __USE_MISC
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# ifndef __USE_ISOC99 /* Conflict with macro of same name. */
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__inline_forward_c(int,isinf, (double __value), (__value))
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# endif
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__inline_forward_c(int,finite, (double __value), (__value))
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__inline_forward(double,scalbn, (double __x, int __n), (__x, __n))
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# endif
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# if defined __USE_MISC || defined __USE_XOPEN
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# ifndef __USE_ISOC99 /* Conflict with macro of same name. */
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__inline_forward_c(int,isnan, (double __value), (__value))
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# endif
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# endif
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# ifdef __USE_ISOC99
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__inline_forward(double,scalbln, (double __x, long int __n), (__x, __n))
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__inline_forward(double,nearbyint, (double __value), (__value))
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__inline_forward(long int,lrint, (double __value), (__value))
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# endif
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# ifdef __USE_GNU
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__inline_forward(void,sincos, (double __x, double *__sinx, double *__cosx),
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(__x, __sinx, __cosx))
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# endif
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# ifdef __USE_ISOC99
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__inline_forward_c(float,floorf, (float __x), (__x))
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__inline_forward_c(float,ceilf, (float __x), (__x))
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# ifdef __USE_MISC
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__inline_forward_c(int,isinff, (float __value), (__value))
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__inline_forward_c(int,finitef, (float __value), (__value))
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__inline_forward(float,scalbnf, (float __x, int __n), (__x, __n))
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__inline_forward_c(int,isnanf, (float __value), (__value))
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# endif
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# ifdef __USE_ISOC99
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__inline_forward(float,scalblnf, (float __x, long int __n), (__x, __n))
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__inline_forward(float,nearbyintf, (float __value), (__value))
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__inline_forward(long int,lrintf, (float __value), (__value))
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# endif
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# ifdef __USE_GNU
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__inline_forward(void,sincosf, (float __x, float *__sinx, float *__cosx),
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(__x, __sinx, __cosx))
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# endif
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__inline_forward_c(long double,floorl, (long double __x), (__x))
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__inline_forward_c(long double,ceill, (long double __x), (__x))
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# ifdef __USE_MISC
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__inline_forward_c(int,isinfl, (long double __value), (__value))
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__inline_forward_c(int,finitel, (long double __value), (__value))
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__inline_forward(long double,scalbnl, (long double __x, int __n), (__x, __n))
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__inline_forward_c(int,isnanl, (long double __value), (__value))
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# endif
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# ifdef __USE_ISOC99
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__inline_forward(long double,scalblnl, (long double __x, long int __n),
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(__x, __n))
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__inline_forward(long double,nearbyintl, (long double __value), (__value))
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__inline_forward(long int,lrintl, (long double __value), (__value))
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# endif
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# ifdef __USE_GNU
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__inline_forward(void,sincosl,
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(long double __x, long double *__sinx, long double *__cosx),
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(__x, __sinx, __cosx))
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# endif
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#endif /* Use misc or ISO C99 */
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#undef __inline_forward
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#undef __inline_forward_c
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#endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
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#endif
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#endif /* GCC. */
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