--- /dev/null
+/* Definitions of inline math functions implemented by the m68881/2.
+ Copyright (C) 1991, 92, 93, 94, 96, 97 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifdef __GNUC__
+
+#include <sys/cdefs.h>
+
+#ifdef __LIBC_M81_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. */
+#define __m81_u(x) __CONCAT(__,x)
+#define __m81_inline static __inline
+#else
+#define __m81_u(x) x
+#define __m81_inline extern __inline
+#define __M81_MATH_INLINES 1
+#endif
+
+/* Define a const math function. */
+#define __m81_defun(rettype, func, args) \
+ __m81_inline rettype __attribute__((__const__)) \
+ __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). */
+
+#if defined __USE_MISC || defined __USE_ISOC9X
+#define __inline_mathop(func, op) \
+ __inline_mathop1(double, func, op) \
+ __inline_mathop1(float, __CONCAT(func,f), op) \
+ __inline_mathop1(long double, __CONCAT(func,l), op)
+#else
+#define __inline_mathop(func, op) \
+ __inline_mathop1(double, func, op)
+#endif
+
+#define __inline_mathop1(float_type,func, op) \
+ __m81_defun (float_type, func, (float_type __mathop_x)) \
+ { \
+ float_type __result; \
+ __asm("f" __STRING(op) "%.x %1, %0" : "=f" (__result) : "f" (__mathop_x));\
+ return __result; \
+ }
+
+#ifdef __LIBC_M81_MATH_INLINES
+/* ieee style elementary functions */
+/* These are internal to the implementation of libm. */
+__inline_mathop(__ieee754_acos, acos)
+__inline_mathop(__ieee754_asin, asin)
+__inline_mathop(__ieee754_cosh, cosh)
+__inline_mathop(__ieee754_sinh, sinh)
+__inline_mathop(__ieee754_exp, etox)
+__inline_mathop(__ieee754_log10, log10)
+__inline_mathop(__ieee754_log, logn)
+__inline_mathop(__ieee754_sqrt, sqrt)
+__inline_mathop(__ieee754_atanh, atanh)
+#endif
+
+__inline_mathop(__atan, atan)
+__inline_mathop(__cos, cos)
+__inline_mathop(__sin, sin)
+__inline_mathop(__tan, tan)
+__inline_mathop(__tanh, tanh)
+__inline_mathop(__fabs, abs)
+
+__inline_mathop(__rint, int)
+__inline_mathop(__expm1, etoxm1)
+__inline_mathop(__log1p, lognp1)
+__inline_mathop(__significand, getman)
+
+__inline_mathop(__log2, log2)
+__inline_mathop(__exp2, twotox)
+__inline_mathop(__trunc, intrz)
+
+#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
+
+__inline_mathop(atan, atan)
+__inline_mathop(cos, cos)
+__inline_mathop(sin, sin)
+__inline_mathop(tan, tan)
+__inline_mathop(tanh, tanh)
+
+#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC9X
+__inline_mathop(rint, int)
+__inline_mathop(expm1, etoxm1)
+__inline_mathop(log1p, lognp1)
+#endif
+
+#ifdef __USE_MISC
+__inline_mathop(significand, getman)
+#endif
+
+#ifdef __USE_ISOC9X
+__inline_mathop(log2, log2)
+__inline_mathop(exp2, twotox)
+__inline_mathop(trunc, intrz)
+#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 __S as the suffix
+ for the function names. */
+
+#ifdef __LIBC_M81_MATH_INLINES
+/* Internally used functions. */
+#define __internal_inline_functions(float_type, s) \
+__m81_defun (float_type, __CONCAT(__ieee754_remainder,s), \
+ (float_type __x, float_type __y)) \
+{ \
+ float_type __result; \
+ __asm("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x)); \
+ return __result; \
+} \
+ \
+__m81_defun (float_type, __CONCAT(__ieee754_fmod,s), \
+ (float_type __x, float_type __y)) \
+{ \
+ float_type __result; \
+ __asm("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x)); \
+ return __result; \
+} \
+ \
+__m81_defun (float_type, __CONCAT(__ieee754_scalb,s), \
+ (float_type __x, float_type __n)) \
+{ \
+ float_type __result; \
+ __asm ("fscale%.x %1, %0" : "=f" (__result) : "f" (__n), "0" (__x)); \
+ return __result; \
+}
+
+__internal_inline_functions (double,)
+__internal_inline_functions (float,f)
+__internal_inline_functions (long double,l)
+#undef __internal_inline_functions
+
+/* Get the m68881 condition codes, to quickly check multiple conditions. */
+static __inline__ unsigned long
+__m81_test (long double __val)
+{
+ unsigned long __fpsr;
+ __asm ("ftst%.x %1; fmove%.l %/fpsr,%0" : "=dm" (__fpsr) : "f" (__val));
+ return __fpsr;
+}
+
+/* Bit values returned by __m81_test. */
+#define __M81_COND_NAN (1 << 24)
+#define __M81_COND_INF (2 << 24)
+#define __M81_COND_ZERO (4 << 24)
+#define __M81_COND_NEG (8 << 24)
+
+#endif /* __LIBC_M81_MATH_INLINES */
+
+/* The rest of the functions are available to the user. */
+
+#define __inline_functions(float_type, s) \
+__m81_inline float_type \
+__m81_u(__CONCAT(__frexp,s))(float_type __value, int *__expptr) \
+{ \
+ float_type __mantissa, __exponent; \
+ int __iexponent; \
+ unsigned long __fpsr; \
+ __asm("ftst%.x %1\n" \
+ "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \
+ if (__fpsr & (7 << 24)) \
+ { \
+ /* Not finite or zero. */ \
+ *__expptr = 0; \
+ return __value; \
+ } \
+ __asm("fgetexp%.x %1, %0" : "=f" (__exponent) : "f" (__value)); \
+ __iexponent = (int) __exponent + 1; \
+ *__expptr = __iexponent; \
+ __asm("fscale%.l %2, %0" : "=f" (__mantissa) \
+ : "0" (__value), "dmi" (-__iexponent)); \
+ return __mantissa; \
+} \
+ \
+__m81_defun (float_type, __CONCAT(__floor,s), (float_type __x)) \
+{ \
+ 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, __CONCAT(__ceil,s), (float_type __x)) \
+{ \
+ 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; \
+} \
+ \
+__m81_defun (int, __CONCAT(__isinf,s), (float_type __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" : "=dm" (__fpsr) : "f" (__value)); \
+ return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0; \
+} \
+ \
+__m81_defun (int, __CONCAT(__isnan,s), (float_type __value)) \
+{ \
+ char __result; \
+ __asm("ftst%.x %1\n" \
+ "fsun %0" : "=dm" (__result) : "f" (__value)); \
+ return __result; \
+} \
+ \
+__m81_defun (int, __CONCAT(__finite,s), (float_type __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" : "=dm" (__fpsr) : "f" (__value)); \
+ return (__fpsr & (3 << 24)) == 0; \
+} \
+ \
+__m81_defun (int, __CONCAT(__signbit,s), (float_type __value)) \
+{ \
+ /* There is no branch-condition for the sign bit, 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 >> 27) & 1; \
+} \
+ \
+__m81_defun (int, __CONCAT(__ilogb,s), (float_type __x)) \
+{ \
+ float_type __result; \
+ if (__x == 0.0) \
+ return 0x80000001; \
+ __asm("fgetexp%.x %1, %0" : "=f" (__result) : "f" (__x)); \
+ return (int) __result; \
+} \
+ \
+__m81_defun (float_type, __CONCAT(__scalbn,s), (float_type __x, int __n)) \
+{ \
+ float_type __result; \
+ __asm ("fscale%.l %1, %0" : "=f" (__result) : "dmi" (__n), "0" (__x)); \
+ return __result; \
+} \
+ \
+__m81_defun (float_type, __CONCAT(__nearbyint,s), (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_inline void \
+__m81_u(__CONCAT(__sincos,s))(float_type __x, float_type *__sinx, \
+ float_type *__cosx) \
+{ \
+ __asm ("fsincos%.x %2,%1:%0" \
+ : "=f" (*__sinx), "=f" (*__cosx) : "f" (__x)); \
+}
+
+/* This defines the three variants of the inline functions. */
+__inline_functions (double,)
+__inline_functions (float,f)
+__inline_functions (long double,l)
+#undef __inline_functions
+
+__m81_defun (long int, __lrint, (long double __x))
+{
+ long int __result;
+ __asm ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x));
+ return __result;
+}
+
+#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
+
+/* Define inline versions of the user visible functions. */
+
+#define __inline_forward_c(rettype, name, args1, args2) \
+extern __inline rettype __attribute__((__const__)) \
+name args1 \
+{ \
+ return __CONCAT(__,name) args2; \
+}
+
+#define __inline_forward(rettype, name, args1, args2) \
+extern __inline rettype name args1 \
+{ \
+ return __CONCAT(__,name) args2; \
+}
+
+__inline_forward(double,frexp, (double __value, int *__expptr),
+ (__value, __expptr))
+__inline_forward_c(double,floor, (double __x), (__x))
+__inline_forward_c(double,ceil, (double __x), (__x))
+#ifdef __USE_MISC
+__inline_forward_c(int,isinf, (double __value), (__value))
+__inline_forward_c(int,finite, (double __value), (__value))
+__inline_forward_c(double,scalbn, (double __x, int __n), (__x, __n))
+#endif
+#if defined __USE_MISC || defined __USE_XOPEN
+#ifndef __USE_ISOC9X /* Conflict with macro of same name. */
+__inline_forward_c(int,isnan, (double __value), (__value))
+#endif
+__inline_forward_c(int,ilogb, (double __value), (__value))
+#endif
+#ifdef __USE_ISOC9X
+__inline_forward_c(double,nearbyint, (double __value), (__value))
+#endif
+#ifdef __USE_GNU
+__inline_forward(void,sincos, (double __x, double *__sinx, double *__cosx),
+ (__x, __sinx, __cosx))
+#endif
+
+#if defined __USE_MISC || defined __USE_ISOC9X
+
+__inline_forward(float,frexpf, (float __value, int *__expptr),
+ (__value, __expptr))
+__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_c(float,scalbnf, (float __x, int __n), (__x, __n))
+__inline_forward_c(int,isnanf, (float __value), (__value))
+__inline_forward_c(int,ilogbf, (float __value), (__value))
+#endif
+#ifdef __USE_ISOC9X
+__inline_forward_c(float,nearbyintf, (float __value), (__value))
+#endif
+#ifdef __USE_GNU
+__inline_forward(void,sincosf, (float __x, float *__sinx, float *__cosx),
+ (__x, __sinx, __cosx))
+#endif
+
+__inline_forward(long double,frexpl, (long double __value, int *__expptr),
+ (__value, __expptr))
+__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_c(long double,scalbnl, (long double __x, int __n),
+ (__x, __n))
+__inline_forward_c(int,isnanl, (long double __value), (__value))
+__inline_forward_c(int,ilogbl, (long double __value), (__value))
+#endif
+#ifdef __USE_ISOC9X
+__inline_forward_c(long double,nearbyintl, (long double __value), (__value))
+__inline_forward_c(long int,lrint, (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 C9X */
+
+#undef __inline_forward
+#undef __inline_forward_c
+
+#ifdef __USE_ISOC9X
+
+/* ISO C 9X defines some macros to perform unordered comparisons. The
+ m68k FPU supports this with special opcodes and we should use them.
+ These must not be inline functions since we have to be able to handle
+ all floating-point types. */
+#undef isgreater
+#define isgreater(x, y) \
+ __extension__ \
+ ({ char __result; \
+ __asm__ ("fcmp%.x %2,%1; fsogt %0" \
+ : "=dm" (__result) : "f" (x), "f" (y)); \
+ (int) __result; })
+
+#undef isgreaterequal
+#define isgreaterequal(x, y) \
+ __extension__ \
+ ({ char __result; \
+ __asm__ ("fcmp%.x %2,%1; fsoge %0" \
+ : "=dm" (__result) : "f" (x), "f" (y)); \
+ (int) __result; })
+
+#undef isless
+#define isless(x, y) \
+ __extension__ \
+ ({ char __result; \
+ __asm__ ("fcmp%.x %2,%1; fsolt %0" \
+ : "=dm" (__result) : "f" (x), "f" (y)); \
+ (int) __result; })
+
+#undef islessequal
+#define islessequal(x, y) \
+ __extension__ \
+ ({ char __result; \
+ __asm__ ("fcmp%.x %2,%1; fsole %0" \
+ : "=dm" (__result) : "f" (x), "f" (y)); \
+ (int) __result; })
+
+#undef islessgreater
+#define islessgreater(x, y) \
+ __extension__ \
+ ({ char __result; \
+ __asm__ ("fcmp%.x %2,%1; fsogl %0" \
+ : "=dm" (__result) : "f" (x), "f" (y)); \
+ (int) __result; })
+
+#undef isunordered
+#define isunordered(x, y) \
+ __extension__ \
+ ({ char __result; \
+ __asm__ ("fcmp%.x %2,%1; fsun %0" \
+ : "=dm" (__result) : "f" (x), "f" (y)); \
+ (int) __result; })
+#endif
+
+#endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
+
+#endif /* GCC. */
projects / thirdparty / glibc.git / commitdiff
