mirror of
https://sourceware.org/git/glibc.git
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Remove x86 mathinline.h.
After previous cleanups, the only code in the x86 bits/mathinline.h that is relevant with current compilers is the inline of __ieee754_atan2l that is conditional on __LIBC_INTERNAL_MATH_INLINES (i.e. for when libm itself is being built). This inline is something that does belong in glibc not GCC, since __ieee754_atan2l is a purely internal function name. This patch moves that inline to a new sysdeps/x86/fpu/math_private.h, removing the bits/mathinline.h header. Note that previously the inline was only for non-SSE 32-bit x86. That condition does not make sense, however, for a long double function; if it's not inlined, exactly the same x87 instruction will end up getting used by the out-of-line function, for both 32-bit and 64-bit. So that condition is not retained in the new version. Tested for x86_64 and x86. As expected, installed stripped shared libraries are unchanged for 32-bit x86, but installed stripped libm.so is changed for x86_64 because calls to __ieee754_atan2l start being inlined where previously they were out of line calls. (The same change to start inlining the function would presumably also apply for 32-bit built with -mfpmath=sse, but that's not a configuration I've tested.) * sysdeps/x86/fpu/math_private.h: New file. * sysdeps/x86/fpu/bits/mathinline.h: Remove.
This commit is contained in:
Joseph Myers
parent
515f463f52
commit
da75c1b180
@ -1,5 +1,8 @@
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2018-12-19 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/x86/fpu/math_private.h: New file.
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* sysdeps/x86/fpu/bits/mathinline.h: Remove.
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* sysdeps/x86/fpu/bits/mathinline.h (sinh): Remove inline
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definition.
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(cosh): Likewise.
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@ -1,295 +0,0 @@
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/* Inline math functions for i387 and SSE.
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Copyright (C) 1995-2018 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_always_inline
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# define __MATH_INLINE __inline
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#else
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# define __MATH_INLINE __extern_always_inline
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#endif
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/* Disable x87 inlines when -fpmath=sse is passed and also when we're building
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on x86_64. Older gcc (gcc-3.2 for example) does not define __SSE2_MATH__
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for x86_64. */
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#if !defined __SSE2_MATH__ && !defined __x86_64__
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# if ((!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
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&& defined __OPTIMIZE__)
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/* The inline functions do not set errno or raise necessarily the
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correct exceptions. */
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# undef math_errhandling
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/* A macro to define float, double, and long double versions of various
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math functions for the ix87 FPU. FUNC is the function name (which will
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be suffixed with f and l for the float and long double version,
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respectively). OP is the name of the FPU operation.
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We define two sets of macros. The set with the additional NP
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doesn't add a prototype declaration. */
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# ifdef __USE_ISOC99
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# define __inline_mathop(func, op) \
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__inline_mathop_ (double, func, op) \
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__inline_mathop_ (float, __CONCAT(func,f), op) \
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__inline_mathop_ (long double, __CONCAT(func,l), op)
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# define __inline_mathopNP(func, op) \
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__inline_mathopNP_ (double, func, op) \
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__inline_mathopNP_ (float, __CONCAT(func,f), op) \
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__inline_mathopNP_ (long double, __CONCAT(func,l), op)
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# else
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# define __inline_mathop(func, op) \
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__inline_mathop_ (double, func, op)
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# define __inline_mathopNP(func, op) \
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__inline_mathopNP_ (double, func, op)
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# endif
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# define __inline_mathop_(float_type, func, op) \
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__inline_mathop_decl_ (float_type, func, op, "0" (__x))
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# define __inline_mathopNP_(float_type, func, op) \
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__inline_mathop_declNP_ (float_type, func, op, "0" (__x))
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# ifdef __USE_ISOC99
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# define __inline_mathop_decl(func, op, params...) \
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__inline_mathop_decl_ (double, func, op, params) \
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__inline_mathop_decl_ (float, __CONCAT(func,f), op, params) \
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__inline_mathop_decl_ (long double, __CONCAT(func,l), op, params)
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# define __inline_mathop_declNP(func, op, params...) \
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__inline_mathop_declNP_ (double, func, op, params) \
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__inline_mathop_declNP_ (float, __CONCAT(func,f), op, params) \
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__inline_mathop_declNP_ (long double, __CONCAT(func,l), op, params)
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# else
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# define __inline_mathop_decl(func, op, params...) \
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__inline_mathop_decl_ (double, func, op, params)
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# define __inline_mathop_declNP(func, op, params...) \
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__inline_mathop_declNP_ (double, func, op, params)
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# endif
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# define __inline_mathop_decl_(float_type, func, op, params...) \
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__MATH_INLINE float_type func (float_type) __THROW; \
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__inline_mathop_declNP_ (float_type, func, op, params)
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# define __inline_mathop_declNP_(float_type, func, op, params...) \
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__MATH_INLINE float_type __NTH (func (float_type __x)) \
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{ \
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register float_type __result; \
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__asm __volatile__ (op : "=t" (__result) : params); \
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return __result; \
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}
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# ifdef __USE_ISOC99
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# define __inline_mathcode(func, arg, code) \
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__inline_mathcode_ (double, func, arg, code) \
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__inline_mathcode_ (float, __CONCAT(func,f), arg, code) \
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__inline_mathcode_ (long double, __CONCAT(func,l), arg, code)
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# define __inline_mathcodeNP(func, arg, code) \
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__inline_mathcodeNP_ (double, func, arg, code) \
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__inline_mathcodeNP_ (float, __CONCAT(func,f), arg, code) \
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__inline_mathcodeNP_ (long double, __CONCAT(func,l), arg, code)
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# define __inline_mathcode2(func, arg1, arg2, code) \
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__inline_mathcode2_ (double, func, arg1, arg2, code) \
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__inline_mathcode2_ (float, __CONCAT(func,f), arg1, arg2, code) \
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__inline_mathcode2_ (long double, __CONCAT(func,l), arg1, arg2, code)
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# define __inline_mathcodeNP2(func, arg1, arg2, code) \
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__inline_mathcodeNP2_ (double, func, arg1, arg2, code) \
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__inline_mathcodeNP2_ (float, __CONCAT(func,f), arg1, arg2, code) \
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__inline_mathcodeNP2_ (long double, __CONCAT(func,l), arg1, arg2, code)
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# define __inline_mathcode3(func, arg1, arg2, arg3, code) \
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__inline_mathcode3_ (double, func, arg1, arg2, arg3, code) \
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__inline_mathcode3_ (float, __CONCAT(func,f), arg1, arg2, arg3, code) \
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__inline_mathcode3_ (long double, __CONCAT(func,l), arg1, arg2, arg3, code)
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# define __inline_mathcodeNP3(func, arg1, arg2, arg3, code) \
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__inline_mathcodeNP3_ (double, func, arg1, arg2, arg3, code) \
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__inline_mathcodeNP3_ (float, __CONCAT(func,f), arg1, arg2, arg3, code) \
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__inline_mathcodeNP3_ (long double, __CONCAT(func,l), arg1, arg2, arg3, code)
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# else
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# define __inline_mathcode(func, arg, code) \
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__inline_mathcode_ (double, func, (arg), code)
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# define __inline_mathcodeNP(func, arg, code) \
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__inline_mathcodeNP_ (double, func, (arg), code)
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# define __inline_mathcode2(func, arg1, arg2, code) \
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__inline_mathcode2_ (double, func, arg1, arg2, code)
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# define __inline_mathcodeNP2(func, arg1, arg2, code) \
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__inline_mathcodeNP2_ (double, func, arg1, arg2, code)
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# define __inline_mathcode3(func, arg1, arg2, arg3, code) \
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__inline_mathcode3_ (double, func, arg1, arg2, arg3, code)
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# define __inline_mathcodeNP3(func, arg1, arg2, arg3, code) \
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__inline_mathcodeNP3_ (double, func, arg1, arg2, arg3, code)
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# endif
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# define __inline_mathcode_(float_type, func, arg, code) \
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__MATH_INLINE float_type func (float_type) __THROW; \
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__inline_mathcodeNP_(float_type, func, arg, code)
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# define __inline_mathcodeNP_(float_type, func, arg, code) \
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__MATH_INLINE float_type __NTH (func (float_type arg)) \
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{ \
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code; \
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}
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# define __inline_mathcode2_(float_type, func, arg1, arg2, code) \
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__MATH_INLINE float_type func (float_type, float_type) __THROW; \
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__inline_mathcodeNP2_ (float_type, func, arg1, arg2, code)
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# define __inline_mathcodeNP2_(float_type, func, arg1, arg2, code) \
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__MATH_INLINE float_type __NTH (func (float_type arg1, float_type arg2)) \
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{ \
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code; \
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}
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# define __inline_mathcode3_(float_type, func, arg1, arg2, arg3, code) \
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__MATH_INLINE float_type func (float_type, float_type, float_type) __THROW; \
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__inline_mathcodeNP3_(float_type, func, arg1, arg2, arg3, code)
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# define __inline_mathcodeNP3_(float_type, func, arg1, arg2, arg3, code) \
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__MATH_INLINE float_type __NTH (func (float_type arg1, float_type arg2, \
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float_type arg3)) \
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{ \
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code; \
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}
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# endif
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# if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
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/* Miscellaneous functions */
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/* __FAST_MATH__ is defined by gcc -ffast-math. */
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# ifdef __FAST_MATH__
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/* Optimized inline implementation, sometimes with reduced precision
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and/or argument range. */
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# if __GNUC_PREREQ (3, 5)
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# define __expm1_code \
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register long double __temp; \
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__temp = __builtin_expm1l (__x); \
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return __temp ? __temp : __x
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# else
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# define __expm1_code \
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register long double __value; \
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register long double __exponent; \
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register long double __temp; \
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__asm __volatile__ \
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("fldl2e # e^x - 1 = 2^(x * log2(e)) - 1\n\t" \
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"fmul %%st(1) # x * log2(e)\n\t" \
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"fst %%st(1)\n\t" \
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"frndint # int(x * log2(e))\n\t" \
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"fxch\n\t" \
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"fsub %%st(1) # fract(x * log2(e))\n\t" \
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"f2xm1 # 2^(fract(x * log2(e))) - 1\n\t" \
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"fscale # 2^(x * log2(e)) - 2^(int(x * log2(e)))\n\t" \
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: "=t" (__value), "=u" (__exponent) : "0" (__x)); \
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__asm __volatile__ \
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("fscale # 2^int(x * log2(e))\n\t" \
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: "=t" (__temp) : "0" (1.0), "u" (__exponent)); \
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__temp -= 1.0; \
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__temp += __value; \
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return __temp ? __temp : __x
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# endif
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__inline_mathcodeNP_ (long double, __expm1l, __x, __expm1_code)
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# if __GNUC_PREREQ (3, 4)
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__inline_mathcodeNP_ (long double, __expl, __x, return __builtin_expl (__x))
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# else
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# define __exp_code \
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register long double __value; \
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register long double __exponent; \
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__asm __volatile__ \
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("fldl2e # e^x = 2^(x * log2(e))\n\t" \
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"fmul %%st(1) # x * log2(e)\n\t" \
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"fst %%st(1)\n\t" \
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"frndint # int(x * log2(e))\n\t" \
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"fxch\n\t" \
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"fsub %%st(1) # fract(x * log2(e))\n\t" \
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"f2xm1 # 2^(fract(x * log2(e))) - 1\n\t" \
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: "=t" (__value), "=u" (__exponent) : "0" (__x)); \
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__value += 1.0; \
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__asm __volatile__ \
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("fscale" \
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: "=t" (__value) : "0" (__value), "u" (__exponent)); \
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return __value
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__inline_mathcodeNP (exp, __x, __exp_code)
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__inline_mathcodeNP_ (long double, __expl, __x, __exp_code)
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# endif
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# endif /* __FAST_MATH__ */
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# ifdef __FAST_MATH__
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# if !__GNUC_PREREQ (3,3)
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__inline_mathopNP (sqrt, "fsqrt")
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__inline_mathopNP_ (long double, __sqrtl, "fsqrt")
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# define __libc_sqrtl(n) __sqrtl (n)
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# else
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# define __libc_sqrtl(n) __builtin_sqrtl (n)
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# endif
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# endif
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# if __GNUC_PREREQ (2, 8)
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__inline_mathcodeNP_ (double, fabs, __x, return __builtin_fabs (__x))
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# ifdef __USE_ISOC99
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__inline_mathcodeNP_ (float, fabsf, __x, return __builtin_fabsf (__x))
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__inline_mathcodeNP_ (long double, fabsl, __x, return __builtin_fabsl (__x))
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# endif
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__inline_mathcodeNP_ (long double, __fabsl, __x, return __builtin_fabsl (__x))
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# else
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__inline_mathop (fabs, "fabs")
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__inline_mathop_ (long double, __fabsl, "fabs")
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# endif
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__inline_mathcode_ (long double, __sgn1l, __x, \
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__extension__ union { long double __xld; unsigned int __xi[3]; } __n = \
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{ __xld: __x }; \
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__n.__xi[2] = (__n.__xi[2] & 0x8000) | 0x3fff; \
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__n.__xi[1] = 0x80000000; \
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__n.__xi[0] = 0; \
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return __n.__xld)
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/* Optimized versions for some non-standardized functions. */
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# ifdef __USE_ISOC99
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# ifdef __FAST_MATH__
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__inline_mathcodeNP (expm1, __x, __expm1_code)
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# endif
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# endif
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/* Undefine some of the large macros which are not used anymore. */
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# ifdef __FAST_MATH__
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# undef __expm1_code
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# undef __exp_code
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# endif /* __FAST_MATH__ */
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# endif /* __NO_MATH_INLINES */
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/* This code is used internally in the GNU libc. */
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# ifdef __LIBC_INTERNAL_MATH_INLINES
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__inline_mathcode2_ (long double, __ieee754_atan2l, __y, __x,
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register long double __value;
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__asm __volatile__ ("fpatan\n\t"
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: "=t" (__value)
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: "0" (__x), "u" (__y) : "st(1)");
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return __value;)
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# endif
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#endif /* !__SSE2_MATH__ && !__x86_64__ */
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32
sysdeps/x86/fpu/math_private.h
Normal file
32
sysdeps/x86/fpu/math_private.h
Normal file
@ -0,0 +1,32 @@
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/* Private inline math functions for x86.
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Copyright (C) 1995-2018 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
|
||||
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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||||
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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 X86_MATH_PRIVATE_H
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#define X86_MATH_PRIVATE_H 1
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#include_next <math_private.h>
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__extern_always_inline long double
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__NTH (__ieee754_atan2l (long double y, long double x))
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{
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long double ret;
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__asm__ __volatile__ ("fpatan" : "=t" (ret) : "0" (x), "u" (y) : "st(1)");
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return ret;
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}
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#endif
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