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/* Float ceil function, sparc32 v9 vis3 version.
Copyright (C) 2012-2014 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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
the rounding mode during this routine.
We add then subtract (or subtract than add if the initial
value was negative) 2**23 to the value, then subtract it
back out.
This will clear out the fractional portion of the value and,
with suitable 'siam' initiated rouding mode settings, round
the final result in the proper direction.
We also use VIS3 moves to avoid using the stack to transfer
values between float and integer registers. */
#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */
#define ZERO %f10 /* 0.0 */
#define SIGN_BIT %f12 /* -0.0 */
ENTRY (__ceilf_vis3)
movwtos %o0, %f0
sethi %hi(TWO_TWENTYTHREE), %o2
fzeros ZERO
fnegs ZERO, SIGN_BIT
movwtos %o2, %f16
fabss %f0, %f14
fcmps %fcc3, %f14, %f16
fmovsuge %fcc3, ZERO, %f16
fands %f0, SIGN_BIT, SIGN_BIT
fors %f16, SIGN_BIT, %f16
siam (1 << 2) | 2
fadds %f0, %f16, %f1
siam (1 << 2) | 0
fsubs %f1, %f16, %f1
siam (0 << 2)
retl
fors %f1, SIGN_BIT, %f0
END (__ceilf_vis3)
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