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13cfd77bf5
When we want to inline builtin math functions, like truncf, for
extern float truncf (float __x) __attribute__ ((__nothrow__ )) __attribute__ ((__const__));
extern float __truncf (float __x) __attribute__ ((__nothrow__ )) __attribute__ ((__const__));
float (truncf) (float) asm ("__truncf");
compiler may redirect truncf calls to __truncf, instead of inlining it
(for instance, clang). The USE_TRUNCF_BUILTIN is 1 to indicate that
truncf should be inlined. In this case, we don't want the truncf
redirection:
1. For each math function which may be inlined, we define
#if USE_TRUNCF_BUILTIN
# define NO_truncf_BUILTIN inline_truncf
#else
# define NO_truncf_BUILTIN truncf
#endif
in <math-use-builtins.h>.
2. Include <math-use-builtins.h> in include/math.h.
3. Change MATH_REDIRECT to
#define MATH_REDIRECT(FUNC, PREFIX, ARGS) \
float (NO_ ## FUNC ## f ## _BUILTIN) (ARGS (float)) \
asm (PREFIX #FUNC "f");
With this change If USE_TRUNCF_BUILTIN is 0, we get
float (truncf) (float) asm ("__truncf");
truncf will be redirected to __truncf.
And for USE_TRUNCF_BUILTIN 1, we get:
float (inline_truncf) (float) asm ("__truncf");
In both cases either truncf will be inlined or the internal alias
(__truncf) will be called.
It is not required for all math-use-builtin symbol, only the one
defined in math.h. It also allows to remove all the math-use-builtin
inclusion, since it is now implicitly included by math.h.
For MIPS, some math-use-builtin headers include sysdep.h and this
in turn includes a lot of extra headers that do not allow ldbl-128
code to override alias definition (math.h will include
some stdlib.h definition). The math-use-builtin only requires
the __mips_isa_rev, so move the defintion to sgidefs.h.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
244 lines
6.1 KiB
C
244 lines
6.1 KiB
C
/* Using math gcc builtins instead of generic implementation. Generic version.
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Copyright (C) 2019-2025 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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<https://www.gnu.org/licenses/>. */
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#ifndef MATH_USE_BUILTINS_H
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#define MATH_USE_BUILTINS_H 1
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#include <features.h> /* For __GNUC_PREREQ. */
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/* Define these macros to 1 to use __builtin_xyz instead of the
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generic implementation. */
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#include <math-use-builtins-nearbyint.h>
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#include <math-use-builtins-rint.h>
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#include <math-use-builtins-floor.h>
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#include <math-use-builtins-ceil.h>
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#include <math-use-builtins-trunc.h>
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#include <math-use-builtins-round.h>
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#include <math-use-builtins-roundeven.h>
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#include <math-use-builtins-copysign.h>
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#include <math-use-builtins-sqrt.h>
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#include <math-use-builtins-fma.h>
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#include <math-use-builtins-fmax.h>
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#include <math-use-builtins-fmin.h>
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#include <math-use-builtins-fabs.h>
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#include <math-use-builtins-lrint.h>
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#include <math-use-builtins-llrint.h>
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#include <math-use-builtins-logb.h>
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#include <math-use-builtins-ffs.h>
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#include <math-use-builtins-lround.h>
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#include <math-use-builtins-llround.h>
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/* Disable internal alias optimizations done at include/math.h if the
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compiler can expand the builtin for the symbol. Different than gcc, the
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clang will always expand the alias before handling the builtin expansion,
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which makes the builtin expansion ineffective. */
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#if USE_SQRT_BUILTIN
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# define NO_sqrt_BUILTIN inline_sqrt
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#else
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# define NO_sqrt_BUILTIN sqrt
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#endif
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#if USE_SQRTF_BUILTIN
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# define NO_sqrtf_BUILTIN inline_sqrtf
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#else
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# define NO_sqrtf_BUILTIN sqrtf
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#endif
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#if USE_SQRTL_BUILTIN
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# define NO_sqrtl_BUILTIN inline_sqrtl
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#else
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# define NO_sqrtl_BUILTIN sqrtl
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#endif
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#if USE_SQRTF128_BUILTIN
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# define NO_sqrtf128_BUILTIN inline_sqrtf128
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#else
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# define NO_sqrtf128_BUILTIN sqrtf128
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#endif
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#if USE_CEIL_BUILTIN
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# define NO_ceil_BUILTIN inline_ceil
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#else
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# define NO_ceil_BUILTIN ceil
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#endif
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#if USE_CEILF_BUILTIN
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# define NO_ceilf_BUILTIN inline_ceilf
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#else
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# define NO_ceilf_BUILTIN ceilf
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#endif
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#if USE_CEILL_BUILTIN
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# define NO_ceill_BUILTIN inline_ceill
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#else
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# define NO_ceill_BUILTIN ceill
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#endif
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#if USE_CEILF128_BUILTIN
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# define NO_ceilf128_BUILTIN inline_ceilf128
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#else
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# define NO_ceilf128_BUILTIN ceilf128
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#endif
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#if USE_FLOOR_BUILTIN
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# define NO_floor_BUILTIN inline_floor
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#else
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# define NO_floor_BUILTIN floor
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#endif
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#if USE_FLOORF_BUILTIN
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# define NO_floorf_BUILTIN inline_floorf
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#else
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# define NO_floorf_BUILTIN floorf
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#endif
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#if USE_FLOORL_BUILTIN
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# define NO_floorl_BUILTIN inline_floorl
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#else
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# define NO_floorl_BUILTIN floorl
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#endif
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#if USE_FLOORF128_BUILTIN
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# define NO_floorf128_BUILTIN inline_floorf128
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#else
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# define NO_floorf128_BUILTIN floorf128
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#endif
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#if USE_ROUNDEVEN_BUILTIN
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# define NO_roundeven_BUILTIN inline_roundeven
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#else
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# define NO_roundeven_BUILTIN roundeven
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#endif
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#if USE_ROUNDEVENF_BUILTIN
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# define NO_roundevenf_BUILTIN inline_roundevenf
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#else
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# define NO_roundevenf_BUILTIN roundevenf
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#endif
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#if USE_ROUNDEVENL_BUILTIN
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# define NO_roundevenl_BUILTIN inline_roundevenl
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#else
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# define NO_roundevenl_BUILTIN roundevenl
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#endif
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#if USE_ROUNDEVENF128_BUILTIN
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# define NO_roundevenf128_BUILTIN inline_roundevenf128
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#else
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# define NO_roundevenf128_BUILTIN roundevenf128
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#endif
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#if USE_RINT_BUILTIN
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# define NO_rint_BUILTIN inline_rint
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#else
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# define NO_rint_BUILTIN rint
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#endif
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#if USE_RINTF_BUILTIN
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# define NO_rintf_BUILTIN inline_rintf
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#else
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# define NO_rintf_BUILTIN rintf
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#endif
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#if USE_RINTL_BUILTIN
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# define NO_rintl_BUILTIN inline_rintl
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#else
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# define NO_rintl_BUILTIN rintl
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#endif
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#if USE_RINTF128_BUILTIN
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# define NO_rintf128_BUILTIN inline_rintf128
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#else
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# define NO_rintf128_BUILTIN rintf128
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#endif
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#if USE_TRUNC_BUILTIN
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# define NO_trunc_BUILTIN inline_trunc
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#else
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# define NO_trunc_BUILTIN trunc
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#endif
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#if USE_TRUNCF_BUILTIN
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# define NO_truncf_BUILTIN inline_truncf
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#else
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# define NO_truncf_BUILTIN truncf
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#endif
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#if USE_TRUNCL_BUILTIN
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# define NO_truncl_BUILTIN inline_truncl
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#else
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# define NO_truncl_BUILTIN truncl
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#endif
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#if USE_TRUNCF128_BUILTIN
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# define NO_truncf128_BUILTIN inline_truncf128
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#else
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# define NO_truncf128_BUILTIN truncf128
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#endif
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#if USE_ROUND_BUILTIN
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# define NO_round_BUILTIN inline_round
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#else
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# define NO_round_BUILTIN round
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#endif
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#if USE_ROUNDF_BUILTIN
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# define NO_roundf_BUILTIN inline_roundf
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#else
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# define NO_roundf_BUILTIN roundf
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#endif
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#if USE_ROUNDL_BUILTIN
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# define NO_roundl_BUILTIN inline_roundl
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#else
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# define NO_roundl_BUILTIN roundl
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#endif
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#if USE_ROUNDF128_BUILTIN
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# define NO_roundf128_BUILTIN inline_roundf128
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#else
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# define NO_roundf128_BUILTIN roundf128
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#endif
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#if USE_COPYSIGN_BUILTIN
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# define NO_copysign_BUILTIN inline_copysign
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#else
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# define NO_copysign_BUILTIN copysign
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#endif
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#if USE_COPYSIGNF_BUILTIN
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# define NO_copysignf_BUILTIN inline_copysignf
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#else
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# define NO_copysignf_BUILTIN copysignf
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#endif
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#if USE_COPYSIGNL_BUILTIN
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# define NO_copysignl_BUILTIN inline_copysignl
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#else
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# define NO_copysignl_BUILTIN copysignl
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#endif
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#if USE_COPYSIGNF128_BUILTIN
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# define NO_copysignf128_BUILTIN inline_copysignf128
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#else
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# define NO_copysignf128_BUILTIN copysignf128
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#endif
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#if USE_FMA_BUILTIN
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# define NO_fma_BUILTIN inline_fma
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#else
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# define NO_fma_BUILTIN fma
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#endif
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#if USE_FMAF_BUILTIN
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# define NO_fmaf_BUILTIN inline_fmaf
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#else
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# define NO_fmaf_BUILTIN fmaf
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#endif
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#if USE_FMAL_BUILTIN
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# define NO_fmal_BUILTIN inline_fmal
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#else
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# define NO_fmal_BUILTIN fmal
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#endif
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#if USE_FMAF128_BUILTIN
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# define NO_fmaf128_BUILTIN inline_fmaf128
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#else
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# define NO_fmaf128_BUILTIN fmaf128
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#endif
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#endif /* MATH_USE_BUILTINS_H */
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