1 /* Floor function. PowerPC32 version.
2 Copyright (C) 2004, 2006 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA
21 #include <math_ldbl_opt.h>
23 .section .rodata.cst4,"aM",@progbits,4
30 mffs fp11 /* Save current FPU rounding mode. */
34 # ifdef HAVE_ASM_PPC_REL16
37 addis r9,r9,.LC0-1b@ha
38 lfs fp13,.LC0-1b@l(r9)
40 bl _GLOBAL_OFFSET_TABLE_@local-4
52 fsub fp12,fp13,fp13 /* generate 0.0 */
53 fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
54 fcmpu cr6,fp1,fp12 /* if (x > 0.0) */
56 mtfsfi 7,3 /* Set rounding mode toward -inf. */
58 fadd fp1,fp1,fp13 /* x+= TWO52; */
59 fsub fp1,fp1,fp13 /* x-= TWO52; */
60 fabs fp1,fp1 /* if (x == 0.0) */
62 mtfsf 0x01,fp11 /* restore previous rounding mode. */
65 bge- cr6,.L9 /* if (x < 0.0) */
66 fsub fp1,fp1,fp13 /* x-= TWO52; */
67 fadd fp1,fp1,fp13 /* x+= TWO52; */
68 fnabs fp1,fp1 /* if (x == 0.0) */
71 mtfsf 0x01,fp11 /* restore previous rounding mode. */
75 weak_alias (__floor, floor)
78 weak_alias (__floor, floorl)
79 strong_alias (__floor, __floorl)
81 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
82 compat_symbol (libm, __floor, floorl, GLIBC_2_0)