2004-06-30 23:43:49 +00:00
|
|
|
/* Floor function. PowerPC32 version.
|
2004-12-22 20:10:10 +00:00
|
|
|
Copyright (C) 2004 Free Software Foundation, Inc.
|
2004-06-30 23:43:49 +00:00
|
|
|
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
|
2004-12-22 20:10:10 +00:00
|
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
|
|
02111-1307 USA. */
|
2004-06-30 23:43:49 +00:00
|
|
|
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
|
2005-05-21 19:29:13 +00:00
|
|
|
.section .rodata.cst4,"aM",@progbits,4
|
|
|
|
|
.align 2
|
2004-06-30 23:43:49 +00:00
|
|
|
.LC0: /* 2**52 */
|
2005-05-21 19:29:13 +00:00
|
|
|
.long 0x59800000
|
2004-06-30 23:43:49 +00:00
|
|
|
|
|
|
|
|
.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
|
2005-05-21 19:29:13 +00:00
|
|
|
lfs fp13,0(r9)
|
2004-06-30 23:43:49 +00:00
|
|
|
#else
|
|
|
|
|
lis r9,.LC0@ha
|
2005-05-21 19:29:13 +00:00
|
|
|
lfs fp13,.LC0@l(r9)
|
2004-06-30 23:43:49 +00:00
|
|
|
#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; */
|
2005-01-06 21:52:35 +00:00
|
|
|
fabs fp1,fp1 /* if (x == 0.0) */
|
|
|
|
|
/* x = 0.0; */
|
2004-06-30 23:43:49 +00:00
|
|
|
mtfsf 0x01,fp11 /* restore previous rounding mode. */
|
|
|
|
|
blr
|
|
|
|
|
.L4:
|
|
|
|
|
bge- cr6,.L9 /* if (x < 0.0) */
|
|
|
|
|
fsub fp1,fp1,fp13 /* x-= TWO52; */
|
|
|
|
|
fadd fp1,fp1,fp13 /* x+= TWO52; */
|
2005-01-06 21:52:35 +00:00
|
|
|
fnabs fp1,fp1 /* if (x == 0.0) */
|
|
|
|
|
/* x = -0.0; */
|
2004-06-30 23:43:49 +00:00
|
|
|
.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
|
