home *** CD-ROM | disk | FTP | other *** search
- /* Inline math functions for i387.
- Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2003,2004,2006,2007
- Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by John C. Bowman <bowman@math.ualberta.ca>, 1995.
-
- 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
- #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
-
-
- #if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2
- /* GCC 2.97 and up have builtins that actually can be used. */
- # if !__GNUC_PREREQ (2,97)
- /* ISO C99 defines some macros to perform unordered comparisons. The
- ix87 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
- # undef isgreaterequal
- # undef isless
- # undef islessequal
- # undef islessgreater
- # undef isunordered
- # ifdef __i686__
- /* For the PentiumPro and more recent processors we can provide
- better code. */
- # define isgreater(x, y) \
- ({ register char __result; \
- __asm__ ("fucomip %%st(1), %%st; seta %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st"); \
- __result; })
- # define isgreaterequal(x, y) \
- ({ register char __result; \
- __asm__ ("fucomip %%st(1), %%st; setae %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st"); \
- __result; })
-
- # define isless(x, y) \
- ({ register char __result; \
- __asm__ ("fucomip %%st(1), %%st; seta %%al" \
- : "=a" (__result) : "u" (x), "t" (y) : "cc", "st"); \
- __result; })
-
- # define islessequal(x, y) \
- ({ register char __result; \
- __asm__ ("fucomip %%st(1), %%st; setae %%al" \
- : "=a" (__result) : "u" (x), "t" (y) : "cc", "st"); \
- __result; })
-
- # define islessgreater(x, y) \
- ({ register char __result; \
- __asm__ ("fucomip %%st(1), %%st; setne %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st"); \
- __result; })
-
- # define isunordered(x, y) \
- ({ register char __result; \
- __asm__ ("fucomip %%st(1), %%st; setp %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st"); \
- __result; })
- # else
- /* This is the dumb, portable code for i386 and above. */
- # define isgreater(x, y) \
- ({ register char __result; \
- __asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
- __result; })
-
- # define isgreaterequal(x, y) \
- ({ register char __result; \
- __asm__ ("fucompp; fnstsw; testb $0x05, %%ah; setz %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
- __result; })
-
- # define isless(x, y) \
- ({ register char __result; \
- __asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al" \
- : "=a" (__result) : "u" (x), "t" (y) : "cc", "st", "st(1)"); \
- __result; })
-
- # define islessequal(x, y) \
- ({ register char __result; \
- __asm__ ("fucompp; fnstsw; testb $0x05, %%ah; setz %%al" \
- : "=a" (__result) : "u" (x), "t" (y) : "cc", "st", "st(1)"); \
- __result; })
-
- # define islessgreater(x, y) \
- ({ register char __result; \
- __asm__ ("fucompp; fnstsw; testb $0x44, %%ah; setz %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
- __result; })
-
- # define isunordered(x, y) \
- ({ register char __result; \
- __asm__ ("fucompp; fnstsw; sahf; setp %%al" \
- : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
- __result; })
- # endif /* __i686__ */
- # endif /* GCC 2.97 */
-
- /* The gcc, version 2.7 or below, has problems with all this inlining
- code. So disable it for this version of the compiler. */
- # if __GNUC_PREREQ (2, 8)
- /* Test for negative number. Used in the signbit() macro. */
- __MATH_INLINE int
- __NTH (__signbitf (float __x))
- {
- __extension__ union { float __f; int __i; } __u = { __f: __x };
- return __u.__i < 0;
- }
- __MATH_INLINE int
- __NTH (__signbit (double __x))
- {
- __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
- return __u.__i[1] < 0;
- }
- __MATH_INLINE int
- __NTH (__signbitl (long double __x))
- {
- __extension__ union { long double __l; int __i[3]; } __u = { __l: __x };
- return (__u.__i[2] & 0x8000) != 0;
- }
- # endif
- #endif
-
-
- /* The gcc, version 2.7 or below, has problems with all this inlining
- code. So disable it for this version of the compiler. */
- #if __GNUC_PREREQ (2, 8)
-
- #if ((!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
- && defined __OPTIMIZE__)
-
- /* A macro to define float, double, and long double versions of various
- math functions for the ix87 FPU. FUNC is the function name (which will
- be suffixed with f and l for the float and long double version,
- respectively). OP is the name of the FPU operation.
- We define two sets of macros. The set with the additional NP
- doesn't add a prototype declaration. */
-
- #if defined __USE_MISC || defined __USE_ISOC99
- # define __inline_mathop(func, op) \
- __inline_mathop_ (double, func, op) \
- __inline_mathop_ (float, __CONCAT(func,f), op) \
- __inline_mathop_ (long double, __CONCAT(func,l), op)
- # define __inline_mathopNP(func, op) \
- __inline_mathopNP_ (double, func, op) \
- __inline_mathopNP_ (float, __CONCAT(func,f), op) \
- __inline_mathopNP_ (long double, __CONCAT(func,l), op)
- #else
- # define __inline_mathop(func, op) \
- __inline_mathop_ (double, func, op)
- # define __inline_mathopNP(func, op) \
- __inline_mathopNP_ (double, func, op)
- #endif
-
- #define __inline_mathop_(float_type, func, op) \
- __inline_mathop_decl_ (float_type, func, op, "0" (__x))
- #define __inline_mathopNP_(float_type, func, op) \
- __inline_mathop_declNP_ (float_type, func, op, "0" (__x))
-
-
- #if defined __USE_MISC || defined __USE_ISOC99
- # define __inline_mathop_decl(func, op, params...) \
- __inline_mathop_decl_ (double, func, op, params) \
- __inline_mathop_decl_ (float, __CONCAT(func,f), op, params) \
- __inline_mathop_decl_ (long double, __CONCAT(func,l), op, params)
- # define __inline_mathop_declNP(func, op, params...) \
- __inline_mathop_declNP_ (double, func, op, params) \
- __inline_mathop_declNP_ (float, __CONCAT(func,f), op, params) \
- __inline_mathop_declNP_ (long double, __CONCAT(func,l), op, params)
- #else
- # define __inline_mathop_decl(func, op, params...) \
- __inline_mathop_decl_ (double, func, op, params)
- # define __inline_mathop_declNP(func, op, params...) \
- __inline_mathop_declNP_ (double, func, op, params)
- #endif
-
- #define __inline_mathop_decl_(float_type, func, op, params...) \
- __MATH_INLINE float_type func (float_type) __THROW; \
- __inline_mathop_declNP_ (float_type, func, op, params)
-
- #define __inline_mathop_declNP_(float_type, func, op, params...) \
- __MATH_INLINE float_type __NTH (func (float_type __x)) \
- { \
- register float_type __result; \
- __asm __volatile__ (op : "=t" (__result) : params); \
- return __result; \
- }
-
-
- #if defined __USE_MISC || defined __USE_ISOC99
- # define __inline_mathcode(func, arg, code) \
- __inline_mathcode_ (double, func, arg, code) \
- __inline_mathcode_ (float, __CONCAT(func,f), arg, code) \
- __inline_mathcode_ (long double, __CONCAT(func,l), arg, code)
- # define __inline_mathcodeNP(func, arg, code) \
- __inline_mathcodeNP_ (double, func, arg, code) \
- __inline_mathcodeNP_ (float, __CONCAT(func,f), arg, code) \
- __inline_mathcodeNP_ (long double, __CONCAT(func,l), arg, code)
- # define __inline_mathcode2(func, arg1, arg2, code) \
- __inline_mathcode2_ (double, func, arg1, arg2, code) \
- __inline_mathcode2_ (float, __CONCAT(func,f), arg1, arg2, code) \
- __inline_mathcode2_ (long double, __CONCAT(func,l), arg1, arg2, code)
- # define __inline_mathcodeNP2(func, arg1, arg2, code) \
- __inline_mathcodeNP2_ (double, func, arg1, arg2, code) \
- __inline_mathcodeNP2_ (float, __CONCAT(func,f), arg1, arg2, code) \
- __inline_mathcodeNP2_ (long double, __CONCAT(func,l), arg1, arg2, code)
- # define __inline_mathcode3(func, arg1, arg2, arg3, code) \
- __inline_mathcode3_ (double, func, arg1, arg2, arg3, code) \
- __inline_mathcode3_ (float, __CONCAT(func,f), arg1, arg2, arg3, code) \
- __inline_mathcode3_ (long double, __CONCAT(func,l), arg1, arg2, arg3, code)
- # define __inline_mathcodeNP3(func, arg1, arg2, arg3, code) \
- __inline_mathcodeNP3_ (double, func, arg1, arg2, arg3, code) \
- __inline_mathcodeNP3_ (float, __CONCAT(func,f), arg1, arg2, arg3, code) \
- __inline_mathcodeNP3_ (long double, __CONCAT(func,l), arg1, arg2, arg3, code)
- #else
- # define __inline_mathcode(func, arg, code) \
- __inline_mathcode_ (double, func, (arg), code)
- # define __inline_mathcodeNP(func, arg, code) \
- __inline_mathcodeNP_ (double, func, (arg), code)
- # define __inline_mathcode2(func, arg1, arg2, code) \
- __inline_mathcode2_ (double, func, arg1, arg2, code)
- # define __inline_mathcodeNP2(func, arg1, arg2, code) \
- __inline_mathcodeNP2_ (double, func, arg1, arg2, code)
- # define __inline_mathcode3(func, arg1, arg2, arg3, code) \
- __inline_mathcode3_ (double, func, arg1, arg2, arg3, code)
- # define __inline_mathcodeNP3(func, arg1, arg2, arg3, code) \
- __inline_mathcodeNP3_ (double, func, arg1, arg2, arg3, code)
- #endif
-
- #define __inline_mathcode_(float_type, func, arg, code) \
- __MATH_INLINE float_type func (float_type) __THROW; \
- __inline_mathcodeNP_(float_type, func, arg, code)
-
- #define __inline_mathcodeNP_(float_type, func, arg, code) \
- __MATH_INLINE float_type __NTH (func (float_type arg)) \
- { \
- code; \
- }
-
-
- #define __inline_mathcode2_(float_type, func, arg1, arg2, code) \
- __MATH_INLINE float_type func (float_type, float_type) __THROW; \
- __inline_mathcodeNP2_ (float_type, func, arg1, arg2, code)
-
- #define __inline_mathcodeNP2_(float_type, func, arg1, arg2, code) \
- __MATH_INLINE float_type __NTH (func (float_type arg1, float_type arg2)) \
- { \
- code; \
- }
-
- #define __inline_mathcode3_(float_type, func, arg1, arg2, arg3, code) \
- __MATH_INLINE float_type func (float_type, float_type, float_type) __THROW; \
- __inline_mathcodeNP3_(float_type, func, arg1, arg2, arg3, code)
-
- #define __inline_mathcodeNP3_(float_type, func, arg1, arg2, arg3, code) \
- __MATH_INLINE float_type __NTH (func (float_type arg1, float_type arg2, \
- float_type arg3)) \
- { \
- code; \
- }
- #endif
-
-
- #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
- /* Miscellaneous functions */
-
- __inline_mathcode (__sgn, __x, \
- return __x == 0.0 ? 0.0 : (__x > 0.0 ? 1.0 : -1.0))
-
- /* __FAST_MATH__ is defined by gcc -ffast-math. */
- #ifdef __FAST_MATH__
- __inline_mathcode (__pow2, __x, \
- register long double __value; \
- register long double __exponent; \
- __extension__ long long int __p = (long long int) __x; \
- if (__x == (long double) __p) \
- { \
- __asm __volatile__ \
- ("fscale" \
- : "=t" (__value) : "0" (1.0), "u" (__x)); \
- return __value; \
- } \
- __asm __volatile__ \
- ("fld %%st(0)\n\t" \
- "frndint # int(x)\n\t" \
- "fxch\n\t" \
- "fsub %%st(1) # fract(x)\n\t" \
- "f2xm1 # 2^(fract(x)) - 1\n\t" \
- : "=t" (__value), "=u" (__exponent) : "0" (__x)); \
- __value += 1.0; \
- __asm __volatile__ \
- ("fscale" \
- : "=t" (__value) : "0" (__value), "u" (__exponent)); \
- return __value)
-
- # ifdef __USE_GNU
- # define __sincos_code \
- register long double __cosr; \
- register long double __sinr; \
- __asm __volatile__ \
- ("fsincos\n\t" \
- "fnstsw %%ax\n\t" \
- "testl $0x400, %%eax\n\t" \
- "jz 1f\n\t" \
- "fldpi\n\t" \
- "fadd %%st(0)\n\t" \
- "fxch %%st(1)\n\t" \
- "2: fprem1\n\t" \
- "fnstsw %%ax\n\t" \
- "testl $0x400, %%eax\n\t" \
- "jnz 2b\n\t" \
- "fstp %%st(1)\n\t" \
- "fsincos\n\t" \
- "1:" \
- : "=t" (__cosr), "=u" (__sinr) : "0" (__x)); \
- *__sinx = __sinr; \
- *__cosx = __cosr
-
- __MATH_INLINE void
- __NTH (__sincos (double __x, double *__sinx, double *__cosx))
- {
- __sincos_code;
- }
-
- __MATH_INLINE void
- __NTH (__sincosf (float __x, float *__sinx, float *__cosx))
- {
- __sincos_code;
- }
-
- __MATH_INLINE void
- __NTH (__sincosl (long double __x, long double *__sinx, long double *__cosx))
- {
- __sincos_code;
- }
- # endif
-
-
- /* Optimized inline implementation, sometimes with reduced precision
- and/or argument range. */
-
- # if __GNUC_PREREQ (3, 5)
- # define __expm1_code \
- register long double __temp; \
- __temp = __builtin_expm1l (__x); \
- return __temp ? __temp : __x
- # else
- # define __expm1_code \
- register long double __value; \
- register long double __exponent; \
- register long double __temp; \
- __asm __volatile__ \
- ("fldl2e # e^x - 1 = 2^(x * log2(e)) - 1\n\t" \
- "fmul %%st(1) # x * log2(e)\n\t" \
- "fst %%st(1)\n\t" \
- "frndint # int(x * log2(e))\n\t" \
- "fxch\n\t" \
- "fsub %%st(1) # fract(x * log2(e))\n\t" \
- "f2xm1 # 2^(fract(x * log2(e))) - 1\n\t" \
- "fscale # 2^(x * log2(e)) - 2^(int(x * log2(e)))\n\t" \
- : "=t" (__value), "=u" (__exponent) : "0" (__x)); \
- __asm __volatile__ \
- ("fscale # 2^int(x * log2(e))\n\t" \
- : "=t" (__temp) : "0" (1.0), "u" (__exponent)); \
- __temp -= 1.0; \
- __temp += __value; \
- return __temp ? __temp : __x
- # endif
- __inline_mathcodeNP_ (long double, __expm1l, __x, __expm1_code)
-
- # if __GNUC_PREREQ (3, 4)
- __inline_mathcodeNP_ (long double, __expl, __x, return __builtin_expl (__x))
- # else
- # define __exp_code \
- register long double __value; \
- register long double __exponent; \
- __asm __volatile__ \
- ("fldl2e # e^x = 2^(x * log2(e))\n\t" \
- "fmul %%st(1) # x * log2(e)\n\t" \
- "fst %%st(1)\n\t" \
- "frndint # int(x * log2(e))\n\t" \
- "fxch\n\t" \
- "fsub %%st(1) # fract(x * log2(e))\n\t" \
- "f2xm1 # 2^(fract(x * log2(e))) - 1\n\t" \
- : "=t" (__value), "=u" (__exponent) : "0" (__x)); \
- __value += 1.0; \
- __asm __volatile__ \
- ("fscale" \
- : "=t" (__value) : "0" (__value), "u" (__exponent)); \
- return __value
- __inline_mathcodeNP (exp, __x, __exp_code)
- __inline_mathcodeNP_ (long double, __expl, __x, __exp_code)
- # endif
-
-
- # if !__GNUC_PREREQ (3, 5)
- __inline_mathcodeNP (tan, __x, \
- register long double __value; \
- register long double __value2 __attribute__ ((__unused__)); \
- __asm __volatile__ \
- ("fptan" \
- : "=t" (__value2), "=u" (__value) : "0" (__x)); \
- return __value)
- # endif
- #endif /* __FAST_MATH__ */
-
-
- #if __GNUC_PREREQ (3, 4)
- __inline_mathcodeNP2_ (long double, __atan2l, __y, __x,
- return __builtin_atan2l (__y, __x))
- #else
- # define __atan2_code \
- register long double __value; \
- __asm __volatile__ \
- ("fpatan" \
- : "=t" (__value) : "0" (__x), "u" (__y) : "st(1)"); \
- return __value
- # ifdef __FAST_MATH__
- __inline_mathcodeNP2 (atan2, __y, __x, __atan2_code)
- # endif
- __inline_mathcodeNP2_ (long double, __atan2l, __y, __x, __atan2_code)
- #endif
-
-
- #if defined __FAST_MATH__ && !__GNUC_PREREQ (3, 5)
- __inline_mathcodeNP2 (fmod, __x, __y, \
- register long double __value; \
- __asm __volatile__ \
- ("1: fprem\n\t" \
- "fnstsw %%ax\n\t" \
- "sahf\n\t" \
- "jp 1b" \
- : "=t" (__value) : "0" (__x), "u" (__y) : "ax", "cc"); \
- return __value)
- #endif
-
-
- #ifdef __FAST_MATH__
- # if !__GNUC_PREREQ (3,3)
- __inline_mathopNP (sqrt, "fsqrt")
- __inline_mathopNP_ (long double, __sqrtl, "fsqrt")
- # define __libc_sqrtl(n) __sqrtl (n)
- # else
- # define __libc_sqrtl(n) __builtin_sqrtl (n)
- # endif
- #endif
-
- #if __GNUC_PREREQ (2, 8)
- __inline_mathcodeNP_ (double, fabs, __x, return __builtin_fabs (__x))
- # if defined __USE_MISC || defined __USE_ISOC99
- __inline_mathcodeNP_ (float, fabsf, __x, return __builtin_fabsf (__x))
- __inline_mathcodeNP_ (long double, fabsl, __x, return __builtin_fabsl (__x))
- # endif
- __inline_mathcodeNP_ (long double, __fabsl, __x, return __builtin_fabsl (__x))
- #else
- __inline_mathop (fabs, "fabs")
- __inline_mathop_ (long double, __fabsl, "fabs")
- #endif
-
- #ifdef __FAST_MATH__
- # if !__GNUC_PREREQ (3, 4)
- /* The argument range of this inline version is reduced. */
- __inline_mathopNP (sin, "fsin")
- /* The argument range of this inline version is reduced. */
- __inline_mathopNP (cos, "fcos")
-
- __inline_mathop_declNP (log, "fldln2; fxch; fyl2x", "0" (__x) : "st(1)")
- # endif
-
- # if !__GNUC_PREREQ (3, 5)
- __inline_mathop_declNP (log10, "fldlg2; fxch; fyl2x", "0" (__x) : "st(1)")
-
- __inline_mathcodeNP (asin, __x, return __atan2l (__x, __libc_sqrtl (1.0 - __x * __x)))
- __inline_mathcodeNP (acos, __x, return __atan2l (__libc_sqrtl (1.0 - __x * __x), __x))
- # endif
-
- # if !__GNUC_PREREQ (3, 4)
- __inline_mathop_declNP (atan, "fld1; fpatan", "0" (__x) : "st(1)")
- # endif
- #endif /* __FAST_MATH__ */
-
- __inline_mathcode_ (long double, __sgn1l, __x, \
- __extension__ union { long double __xld; unsigned int __xi[3]; } __n = \
- { __xld: __x }; \
- __n.__xi[2] = (__n.__xi[2] & 0x8000) | 0x3fff; \
- __n.__xi[1] = 0x80000000; \
- __n.__xi[0] = 0; \
- return __n.__xld)
-
-
- #ifdef __FAST_MATH__
- /* The argument range of the inline version of sinhl is slightly reduced. */
- __inline_mathcodeNP (sinh, __x, \
- register long double __exm1 = __expm1l (__fabsl (__x)); \
- return 0.5 * (__exm1 / (__exm1 + 1.0) + __exm1) * __sgn1l (__x))
-
- __inline_mathcodeNP (cosh, __x, \
- register long double __ex = __expl (__x); \
- return 0.5 * (__ex + 1.0 / __ex))
-
- __inline_mathcodeNP (tanh, __x, \
- register long double __exm1 = __expm1l (-__fabsl (__x + __x)); \
- return __exm1 / (__exm1 + 2.0) * __sgn1l (-__x))
- #endif
-
- __inline_mathcodeNP (floor, __x, \
- register long double __value; \
- register int __ignore; \
- unsigned short int __cw; \
- unsigned short int __cwtmp; \
- __asm __volatile ("fnstcw %3\n\t" \
- "movzwl %3, %1\n\t" \
- "andl $0xf3ff, %1\n\t" \
- "orl $0x0400, %1\n\t" /* rounding down */ \
- "movw %w1, %2\n\t" \
- "fldcw %2\n\t" \
- "frndint\n\t" \
- "fldcw %3" \
- : "=t" (__value), "=&q" (__ignore), "=m" (__cwtmp), \
- "=m" (__cw) \
- : "0" (__x)); \
- return __value)
-
- __inline_mathcodeNP (ceil, __x, \
- register long double __value; \
- register int __ignore; \
- unsigned short int __cw; \
- unsigned short int __cwtmp; \
- __asm __volatile ("fnstcw %3\n\t" \
- "movzwl %3, %1\n\t" \
- "andl $0xf3ff, %1\n\t" \
- "orl $0x0800, %1\n\t" /* rounding up */ \
- "movw %w1, %2\n\t" \
- "fldcw %2\n\t" \
- "frndint\n\t" \
- "fldcw %3" \
- : "=t" (__value), "=&q" (__ignore), "=m" (__cwtmp), \
- "=m" (__cw) \
- : "0" (__x)); \
- return __value)
-
- #ifdef __FAST_MATH__
- # define __ldexp_code \
- register long double __value; \
- __asm __volatile__ \
- ("fscale" \
- : "=t" (__value) : "0" (__x), "u" ((long double) __y)); \
- return __value
-
- __MATH_INLINE double
- __NTH (ldexp (double __x, int __y))
- {
- __ldexp_code;
- }
- #endif
-
-
- /* Optimized versions for some non-standardized functions. */
- #if defined __USE_ISOC99 || defined __USE_MISC
-
- # ifdef __FAST_MATH__
- __inline_mathcodeNP (expm1, __x, __expm1_code)
-
- /* We cannot rely on M_SQRT being defined. So we do it for ourself
- here. */
- # define __M_SQRT2 1.41421356237309504880L /* sqrt(2) */
-
- # if !__GNUC_PREREQ (3, 5)
- __inline_mathcodeNP (log1p, __x, \
- register long double __value; \
- if (__fabsl (__x) >= 1.0 - 0.5 * __M_SQRT2) \
- __value = logl (1.0 + __x); \
- else \
- __asm __volatile__ \
- ("fldln2\n\t" \
- "fxch\n\t" \
- "fyl2xp1" \
- : "=t" (__value) : "0" (__x) : "st(1)"); \
- return __value)
- # endif
-
-
- /* The argument range of the inline version of asinhl is slightly reduced. */
- __inline_mathcodeNP (asinh, __x, \
- register long double __y = __fabsl (__x); \
- return (log1pl (__y * __y / (__libc_sqrtl (__y * __y + 1.0) + 1.0) + __y) \
- * __sgn1l (__x)))
-
- __inline_mathcodeNP (acosh, __x, \
- return logl (__x + __libc_sqrtl (__x - 1.0) * __libc_sqrtl (__x + 1.0)))
-
- __inline_mathcodeNP (atanh, __x, \
- register long double __y = __fabsl (__x); \
- return -0.5 * log1pl (-(__y + __y) / (1.0 + __y)) * __sgn1l (__x))
-
- /* The argument range of the inline version of hypotl is slightly reduced. */
- __inline_mathcodeNP2 (hypot, __x, __y,
- return __libc_sqrtl (__x * __x + __y * __y))
-
- # if !__GNUC_PREREQ (3, 5)
- __inline_mathcodeNP(logb, __x, \
- register long double __value; \
- register long double __junk; \
- __asm __volatile__ \
- ("fxtract\n\t" \
- : "=t" (__junk), "=u" (__value) : "0" (__x)); \
- return __value)
- # endif
-
- # endif
- #endif
-
- #ifdef __USE_ISOC99
- # ifdef __FAST_MATH__
-
- # if !__GNUC_PREREQ (3, 5)
- __inline_mathop_declNP (log2, "fld1; fxch; fyl2x", "0" (__x) : "st(1)")
- # endif
-
- __MATH_INLINE float
- __NTH (ldexpf (float __x, int __y))
- {
- __ldexp_code;
- }
-
- __MATH_INLINE long double
- __NTH (ldexpl (long double __x, int __y))
- {
- __ldexp_code;
- }
-
- __inline_mathcodeNP3 (fma, __x, __y, __z, return (__x * __y) + __z)
-
- __inline_mathopNP (rint, "frndint")
- # endif /* __FAST_MATH__ */
-
- # define __lrint_code \
- long int __lrintres; \
- __asm__ __volatile__ \
- ("fistpl %0" \
- : "=m" (__lrintres) : "t" (__x) : "st"); \
- return __lrintres
- __MATH_INLINE long int
- __NTH (lrintf (float __x))
- {
- __lrint_code;
- }
- __MATH_INLINE long int
- __NTH (lrint (double __x))
- {
- __lrint_code;
- }
- __MATH_INLINE long int
- __NTH (lrintl (long double __x))
- {
- __lrint_code;
- }
- # undef __lrint_code
-
- # define __llrint_code \
- long long int __llrintres; \
- __asm__ __volatile__ \
- ("fistpll %0" \
- : "=m" (__llrintres) : "t" (__x) : "st"); \
- return __llrintres
- __MATH_INLINE long long int
- __NTH (llrintf (float __x))
- {
- __llrint_code;
- }
- __MATH_INLINE long long int
- __NTH (llrint (double __x))
- {
- __llrint_code;
- }
- __MATH_INLINE long long int
- __NTH (llrintl (long double __x))
- {
- __llrint_code;
- }
- # undef __llrint_code
-
- #endif
-
-
- #ifdef __USE_MISC
-
- # if defined __FAST_MATH__ && !__GNUC_PREREQ (3, 5)
- __inline_mathcodeNP2 (drem, __x, __y, \
- register double __value; \
- register int __clobbered; \
- __asm __volatile__ \
- ("1: fprem1\n\t" \
- "fstsw %%ax\n\t" \
- "sahf\n\t" \
- "jp 1b" \
- : "=t" (__value), "=&a" (__clobbered) : "0" (__x), "u" (__y) : "cc"); \
- return __value)
- # endif
-
-
- /* This function is used in the `isfinite' macro. */
- __MATH_INLINE int
- __NTH (__finite (double __x))
- {
- return (__extension__
- (((((union { double __d; int __i[2]; }) {__d: __x}).__i[1]
- | 0x800fffffu) + 1) >> 31));
- }
-
- /* Miscellaneous functions */
- # ifdef __FAST_MATH__
- __inline_mathcode (__coshm1, __x, \
- register long double __exm1 = __expm1l (__fabsl (__x)); \
- return 0.5 * (__exm1 / (__exm1 + 1.0)) * __exm1)
-
- __inline_mathcode (__acosh1p, __x, \
- return log1pl (__x + __libc_sqrtl (__x) * __libc_sqrtl (__x + 2.0)))
-
- # endif /* __FAST_MATH__ */
- #endif /* __USE_MISC */
-
- /* Undefine some of the large macros which are not used anymore. */
- #undef __atan2_code
- #ifdef __FAST_MATH__
- # undef __expm1_code
- # undef __exp_code
- # undef __sincos_code
- #endif /* __FAST_MATH__ */
-
- #endif /* __NO_MATH_INLINES */
-
-
- /* This code is used internally in the GNU libc. */
- #ifdef __LIBC_INTERNAL_MATH_INLINES
- __inline_mathop (__ieee754_sqrt, "fsqrt")
- __inline_mathcode2 (__ieee754_atan2, __y, __x,
- register long double __value;
- __asm __volatile__ ("fpatan\n\t"
- : "=t" (__value)
- : "0" (__x), "u" (__y) : "st(1)");
- return __value;)
- #endif
-
- #endif /* __GNUC__ */
-