projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| bfff8b1b | 1 | /* Copyright (C) 1996-2017 Free Software Foundation, Inc. |
| a6d9783f MS |
2 | |
| 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, see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 19 | #include <math.h> | |
| d9ff799a SE |
20 | #include <get-rounding-mode.h> |
| 21 | #include <stdint.h> | |
| a6d9783f MS |
22 | |
| 23 | #ifndef FUNC | |
| 5c5bd24e | 24 | # define FUNC lrint |
| a6d9783f MS |
25 | #endif |
| 26 | ||
| 27 | #ifndef ITYPE | |
| 5c5bd24e | 28 | # define ITYPE double |
| d9ff799a | 29 | # define IREG_SIZE 64 |
| a6d9783f | 30 | #else |
| d9ff799a SE |
31 | # ifndef IREG_SIZE |
| 32 | # error IREG_SIZE not defined | |
| 5c5bd24e | 33 | # endif |
| a6d9783f MS |
34 | #endif |
| 35 | ||
| 36 | #ifndef OTYPE | |
| 5c5bd24e | 37 | # define OTYPE long int |
| d9ff799a SE |
38 | # ifdef __ILP32__ |
| 39 | # define OREG_SIZE 32 | |
| 40 | # else | |
| 41 | # define OREG_SIZE 64 | |
| 42 | # endif | |
| 43 | #else | |
| 44 | # ifndef OREG_SIZE | |
| 45 | # error OREG_SIZE not defined | |
| 46 | # endif | |
| a6d9783f MS |
47 | #endif |
| 48 | ||
| d9ff799a SE |
49 | #if IREG_SIZE == 32 |
| 50 | # define IREGS "s" | |
| 51 | #else | |
| 52 | # define IREGS "d" | |
| 53 | #endif | |
| 54 | ||
| 55 | #if OREG_SIZE == 32 | |
| 56 | # define OREGS "w" | |
| 57 | #else | |
| 58 | # define OREGS "x" | |
| 59 | #endif | |
| a6d9783f MS |
60 | |
| 61 | #define __CONCATX(a,b) __CONCAT(a,b) | |
| 62 | ||
| 63 | OTYPE | |
| 5e543752 | 64 | __CONCATX(__,FUNC) (ITYPE x) |
| a6d9783f MS |
65 | { |
| 66 | OTYPE result; | |
| 67 | ITYPE temp; | |
| d9ff799a SE |
68 | |
| 69 | #if IREG_SIZE == 64 && OREG_SIZE == 32 | |
| 70 | if (__builtin_fabs (x) > INT32_MAX) | |
| 71 | { | |
| 72 | /* Converting large values to a 32 bit int may cause the frintx/fcvtza | |
| 73 | sequence to set both FE_INVALID and FE_INEXACT. To avoid this | |
| 74 | check the rounding mode and do a single instruction with the | |
| 75 | appropriate rounding mode. */ | |
| 76 | ||
| 77 | switch (get_rounding_mode ()) | |
| 78 | { | |
| 79 | case FE_TONEAREST: | |
| 80 | asm volatile ("fcvtns" "\t%" OREGS "0, %" IREGS "1" | |
| 81 | : "=r" (result) : "w" (x)); | |
| 82 | break; | |
| 83 | case FE_UPWARD: | |
| 84 | asm volatile ("fcvtps" "\t%" OREGS "0, %" IREGS "1" | |
| 85 | : "=r" (result) : "w" (x)); | |
| 86 | break; | |
| 87 | case FE_DOWNWARD: | |
| 88 | asm volatile ("fcvtms" "\t%" OREGS "0, %" IREGS "1" | |
| 89 | : "=r" (result) : "w" (x)); | |
| 90 | break; | |
| 91 | case FE_TOWARDZERO: | |
| 92 | default: | |
| 93 | asm volatile ("fcvtzs" "\t%" OREGS "0, %" IREGS "1" | |
| 94 | : "=r" (result) : "w" (x)); | |
| 95 | } | |
| 96 | return result; | |
| 97 | } | |
| 98 | #endif | |
| a6d9783f MS |
99 | asm ( "frintx" "\t%" IREGS "1, %" IREGS "2\n\t" |
| 100 | "fcvtzs" "\t%" OREGS "0, %" IREGS "1" | |
| 101 | : "=r" (result), "=w" (temp) : "w" (x) ); | |
| 102 | return result; | |
| 103 | } | |
| 104 | ||
| 3bae7c5d | 105 | weak_alias (__CONCATX(__,FUNC), FUNC) |