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/* Truncate argument to nearest integral value not larger than
the argument, sparc64 vis3 version.
Copyright (C) 2013-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David S. Miller <davem@davemloft.net>, 2013.
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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* We pop constants into the FPU registers using the incoming
argument stack slots, since this avoid having to use any PIC
references. We also thus avoid having to allocate a register
window.
VIS instructions are used to facilitate the formation of
easier constants, and the propagation of the sign bit. */
#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */
#define ZERO %f10 /* 0.0 */
#define SIGN_BIT %f12 /* -0.0 */
ENTRY (__truncf_vis3)
sethi %hi(TWO_TWENTYTHREE), %o2
fzeros ZERO
fnegs ZERO, SIGN_BIT
movwtos %o2,%f16
fabss %f1, %f14
fcmps %fcc3, %f14, %f16
fmovsuge %fcc3, ZERO, %f14
fands %f1, SIGN_BIT, SIGN_BIT
fstoi %f14, %f14
fitos %f14, %f14
fadds %f1, ZERO, %f18
fmovsuge %fcc3, %f18, %f14
retl
fors %f14, SIGN_BIT, %f0
END (__truncf_vis3)
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