projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5ce98c3f | 1 | /* Floor function. PowerPC64 version. |
| a334319f | 2 | Copyright (C) 2004 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 | |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 19 | ||
| 20 | #include <sysdep.h> | |
| 21 | ||
| 22 | .section ".toc","aw" | |
| 23 | .LC0: /* 2**52 */ | |
| 24 | .tc FD_43300000_0[TC],0x4330000000000000 | |
| 25 | .section ".text" | |
| 26 | ||
| a334319f | 27 | ENTRY (__floor) |
| d7d06f79 | 28 | CALL_MCOUNT 0 |
| 5ce98c3f UD |
29 | mffs fp11 /* Save current FPU rounding mode. */ |
| 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) */ | |
| 34 | fcmpu cr6,fp1,fp12 /* if (x > 0.0) */ | |
| 35 | bnllr- cr7 | |
| 36 | mtfsfi 7,3 /* Set rounding mode toward -inf. */ | |
| 37 | ble- cr6,.L4 | |
| 38 | fadd fp1,fp1,fp13 /* x+= TWO52; */ | |
| 39 | fsub fp1,fp1,fp13 /* x-= TWO52; */ | |
| a334319f | 40 | fcmpu cr5,fp1,fp12 /* if (x > 0.0) */ |
| 5ce98c3f | 41 | mtfsf 0x01,fp11 /* restore previous rounding mode. */ |
| a334319f UD |
42 | bnelr+ cr5 |
| 43 | fmr fp1,fp12 /* x must be +0.0 for the 0.0 case. */ | |
| 5ce98c3f UD |
44 | blr |
| 45 | .L4: | |
| 46 | bge- cr6,.L9 /* if (x < 0.0) */ | |
| 47 | fsub fp1,fp1,fp13 /* x-= TWO52; */ | |
| 48 | fadd fp1,fp1,fp13 /* x+= TWO52; */ | |
| 49 | .L9: | |
| 50 | mtfsf 0x01,fp11 /* restore previous rounding mode. */ | |
| 51 | blr | |
| 52 | END (__floor) | |
| 53 | ||
| 54 | weak_alias (__floor, floor) | |
| 55 | ||
| 56 | #ifdef NO_LONG_DOUBLE | |
| 57 | weak_alias (__floor, floorl) | |
| 58 | strong_alias (__floor, __floorl) | |
| 59 | #endif |