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5ce98c3f | 1 | /* Floor function. PowerPC64 version. |
04277e02 | 2 | Copyright (C) 2004-2019 Free Software Foundation, Inc. |
5ce98c3f UD |
3 | This file is part of the GNU C Library. |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
5ce98c3f UD |
18 | |
19 | #include <sysdep.h> | |
f964490f | 20 | #include <math_ldbl_opt.h> |
51ea3b20 | 21 | #include <libm-alias-double.h> |
5ce98c3f UD |
22 | |
23 | .section ".toc","aw" | |
24 | .LC0: /* 2**52 */ | |
25 | .tc FD_43300000_0[TC],0x4330000000000000 | |
26 | .section ".text" | |
27 | ||
d5b41185 | 28 | ENTRY (__floor, 4) |
d7d06f79 | 29 | CALL_MCOUNT 0 |
5ce98c3f UD |
30 | lfd fp13,.LC0@toc(2) |
31 | fabs fp0,fp1 | |
32 | fsub fp12,fp13,fp13 /* generate 0.0 */ | |
33 | fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */ | |
b4d80349 JM |
34 | mffs fp11 /* Save current FPU rounding mode and |
35 | "inexact" state. */ | |
5ce98c3f | 36 | fcmpu cr6,fp1,fp12 /* if (x > 0.0) */ |
f6ef0657 | 37 | bnl- cr7,.L10 |
5ce98c3f UD |
38 | mtfsfi 7,3 /* Set rounding mode toward -inf. */ |
39 | ble- cr6,.L4 | |
40 | fadd fp1,fp1,fp13 /* x+= TWO52; */ | |
41 | fsub fp1,fp1,fp13 /* x-= TWO52; */ | |
4d37c8aa UD |
42 | fabs fp1,fp1 /* if (x == 0.0) */ |
43 | /* x = 0.0; */ | |
b4d80349 JM |
44 | mtfsf 0xff,fp11 /* Restore previous rounding mode and |
45 | "inexact" state. */ | |
5ce98c3f UD |
46 | blr |
47 | .L4: | |
48 | bge- cr6,.L9 /* if (x < 0.0) */ | |
49 | fsub fp1,fp1,fp13 /* x-= TWO52; */ | |
50 | fadd fp1,fp1,fp13 /* x+= TWO52; */ | |
4d37c8aa UD |
51 | fnabs fp1,fp1 /* if (x == 0.0) */ |
52 | /* x = -0.0; */ | |
5ce98c3f | 53 | .L9: |
b4d80349 JM |
54 | mtfsf 0xff,fp11 /* Restore previous rounding mode and |
55 | "inexact" state. */ | |
5ce98c3f | 56 | blr |
f6ef0657 JM |
57 | .L10: |
58 | /* Ensure sNaN input is converted to qNaN. */ | |
59 | fcmpu cr7,fp1,fp1 | |
60 | beqlr cr7 | |
61 | fadd fp1,fp1,fp1 | |
62 | blr | |
5ce98c3f UD |
63 | END (__floor) |
64 | ||
51ea3b20 | 65 | libm_alias_double (__floor, floor) |