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/* Floor function. PowerPC32 version.
Copyright (C) 2004 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
.section .rodata
.align 3
.type TWO52.0,@object
.size TWO52.0,8
TWO52.0:
.long 0x43300000
.long 0
.section .rodata.cst8,"aM",@progbits,8
.align 3
.LC0: /* 2**52 */
.long 0x43300000
.long 0
.section ".text"
ENTRY (__floor)
mffs fp11 /* Save current FPU rounding mode. */
#ifdef SHARED
mflr r11
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r10
lwz r9,.LC0@got(10)
mtlr r11
lfd fp13,0(r9)
#else
lis r9,.LC0@ha
lfd fp13,.LC0@l(r9)
#endif
fabs fp0,fp1
fsub fp12,fp13,fp13 /* generate 0.0 */
fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
fcmpu cr6,fp1,fp12 /* if (x > 0.0) */
bnllr- cr7
mtfsfi 7,3 /* Set rounding mode toward -inf. */
ble- cr6,.L4
fadd fp1,fp1,fp13 /* x+= TWO52; */
fsub fp1,fp1,fp13 /* x-= TWO52; */
fcmpu cr5,fp1,fp12 /* if (x > 0.0) */
mtfsf 0x01,fp11 /* restore previous rounding mode. */
bnelr+ cr5
fmr fp1,fp12 /* x must be +0.0 for the 0.0 case. */
blr
.L4:
bge- cr6,.L9 /* if (x < 0.0) */
fsub fp1,fp1,fp13 /* x-= TWO52; */
fadd fp1,fp1,fp13 /* x+= TWO52; */
.L9:
mtfsf 0x01,fp11 /* restore previous rounding mode. */
blr
END (__floor)
weak_alias (__floor, floor)
#ifdef NO_LONG_DOUBLE
weak_alias (__floor, floorl)
strong_alias (__floor, __floorl)
#endif
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