[thirdparty/glibc.git] / sysdeps / sparc / sparc64 / fpu / multiarch / s_lrint-vis3.S

/* lrint(), sparc64 vis3 version.
   Copyright (C) 2012-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by David S. Miller <davem@davemloft.net>, 2012.

   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>

	/* VIS instructions are used to facilitate the formation of
	   easier constants, and the propagation of the sign bit.  */

#define TWO_FIFTYTWO	0x43300000		/* 2**52 */

#define ZERO		%f10			/* 0.0 */
#define SIGN_BIT	%f12			/* -0.0 */

ENTRY (__lrint_vis3)
	sethi	%hi(TWO_FIFTYTWO), %o2
	sllx	%o2, 32, %o2
	fzero	ZERO

	fnegd	ZERO, SIGN_BIT
	movxtod	%o2, %f16
	fabsd	%f0, %f14

	fcmpd	%fcc3, %f14, %f16

	fmovduge %fcc3, ZERO, %f16
	fand	%f0, SIGN_BIT, SIGN_BIT

	for	%f16, SIGN_BIT, %f16
	faddd	%f0, %f16, %f6
	fsubd	%f6, %f16, %f0
	fabsd	%f0, %f0
	for	%f0, SIGN_BIT, %f0
	fdtox	%f0, %f4
	retl
	 movdtox %f4, %o0
END (__lrint_vis3)
Commit	Line	Data
559398ab	1	/* lrint(), sparc64 vis3 version.
04277e02	2	Copyright (C) 2012-2019 Free Software Foundation, Inc.
559398ab DM	3	This file is part of the GNU C Library.
	4	Contributed by David S. Miller <davem@davemloft.net>, 2012.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; if not, see
5a82c748	18	<https://www.gnu.org/licenses/>. */
559398ab DM	19
	20	#include <sysdep.h>
	21
	22	/* VIS instructions are used to facilitate the formation of
	23	easier constants, and the propagation of the sign bit. */
	24
	25	#define TWO_FIFTYTWO 0x43300000 /* 2*52 /
	26
	27	#define ZERO %f10 /* 0.0 */
	28	#define SIGN_BIT %f12 /* -0.0 */
	29
	30	ENTRY (__lrint_vis3)
	31	sethi %hi(TWO_FIFTYTWO), %o2
	32	sllx %o2, 32, %o2
	33	fzero ZERO
	34
	35	fnegd ZERO, SIGN_BIT
	36	movxtod %o2, %f16
	37	fabsd %f0, %f14
	38
	39	fcmpd %fcc3, %f14, %f16
	40
	41	fmovduge %fcc3, ZERO, %f16
	42	fand %f0, SIGN_BIT, SIGN_BIT
	43
	44	for %f16, SIGN_BIT, %f16
	45	faddd %f0, %f16, %f6
	46	fsubd %f6, %f16, %f0
	47	fabsd %f0, %f0
	48	for %f0, SIGN_BIT, %f0
	49	fdtox %f0, %f4
	50	retl
	51	movdtox %f4, %o0
	52	END (__lrint_vis3)