[thirdparty/glibc.git] / sysdeps / i386 / i686 / fpu / s_fmaxf.S

/* Compute maximum of two numbers, regarding NaN as missing argument.
   Copyright (C) 1997-2022 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 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, see
   <https://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#include <libm-alias-float.h>

	.text
ENTRY(__fmaxf)
	flds	4(%esp)		// x
	flds	8(%esp)		// x : y

	fucomi	%st(0), %st
	fcmovu	%st(1), %st	// now %st contains y if not NaN, x otherwise

	fxch

	fucomi	%st(1), %st
	fcmovb	%st(1), %st

	fstp	%st(1)

	ret
END(__fmaxf)
libm_alias_float (__fmax, fmax)
Commit	Line	Data
6973fc01	1	/* Compute maximum of two numbers, regarding NaN as missing argument.
581c785b	2	Copyright (C) 1997-2022 Free Software Foundation, Inc.
6973fc01	3	This file is part of the GNU C Library.
6973fc01 UD	4
6973fc01 UD	5	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
6973fc01 UD	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	13	Lesser General Public License for more details.
6973fc01	14
41bdb6e2	15	You should have received a copy of the GNU Lesser General Public
59ba27a6	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>. */
6973fc01 UD	18
6973fc01 UD	19	#include <sysdep.h>
e4602cba	20	#include <libm-alias-float.h>
6973fc01 UD	21
	22	.text
	23	ENTRY(__fmaxf)
	24	flds 4(%esp) // x
	25	flds 8(%esp) // x : y
	26
	27	fucomi %st(0), %st
	28	fcmovu %st(1), %st // now %st contains y if not NaN, x otherwise
	29
	30	fxch
	31
	32	fucomi %st(1), %st
	33	fcmovb %st(1), %st
	34
	35	fstp %st(1)
	36
	37	ret
	38	END(__fmaxf)
e4602cba	39	libm_alias_float (__fmax, fmax)