projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| c42d5e98 DM |
1 | /* Round float to int floating-point values without generating |
| 2 | an inexact exception, sparc32 v9 version. | |
| 3 | ||
| 04277e02 | 4 | Copyright (C) 2013-2019 Free Software Foundation, Inc. |
| c42d5e98 DM |
5 | This file is part of the GNU C Library. |
| 6 | Contributed by David S. Miller <davem@davemloft.net>, 2013. | |
| 7 | ||
| 8 | The GNU C Library is free software; you can redistribute it and/or | |
| 9 | modify it under the terms of the GNU Lesser General Public | |
| 10 | License as published by the Free Software Foundation; either | |
| 11 | version 2.1 of the License, or (at your option) any later version. | |
| 12 | ||
| 13 | The GNU C Library is distributed in the hope that it will be useful, | |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | Lesser General Public License for more details. | |
| 17 | ||
| 18 | You should have received a copy of the GNU Lesser General Public | |
| 19 | License along with the GNU C Library; if not, see | |
| 5a82c748 | 20 | <https://www.gnu.org/licenses/>. */ |
| c42d5e98 DM |
21 | |
| 22 | #include <sysdep.h> | |
| 3e5efdbd | 23 | #include <libm-alias-float.h> |
| c42d5e98 DM |
24 | |
| 25 | /* We pop constants into the FPU registers using the incoming | |
| 26 | argument stack slots, since this avoid having to use any PIC | |
| 27 | references. We also thus avoid having to allocate a register | |
| 28 | window. | |
| 29 | ||
| 30 | VIS instructions are used to facilitate the formation of | |
| 31 | easier constants, and the propagation of the sign bit. */ | |
| 32 | ||
| 33 | #define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ | |
| 34 | ||
| 35 | #define ZERO %f10 /* 0.0 */ | |
| 36 | #define SIGN_BIT %f12 /* -0.0 */ | |
| 37 | ||
| 38 | ENTRY (__nearbyintf) | |
| 3ef3f1b9 DM |
39 | st %o0, [%sp + 68] |
| 40 | ld [%sp + 68], %f1 | |
| 2cbec365 | 41 | fcmps %fcc3, %f1, %f1 /* Check for sNaN */ |
| c42d5e98 | 42 | st %fsr, [%sp + 88] |
| c42d5e98 DM |
43 | sethi %hi(TWO_TWENTYTHREE), %o2 |
| 44 | sethi %hi(0xf8003e0), %o5 | |
| 45 | ld [%sp + 88], %o4 | |
| 46 | fzeros ZERO | |
| 47 | or %o5, %lo(0xf8003e0), %o5 | |
| 48 | fnegs ZERO, SIGN_BIT | |
| 49 | andn %o4, %o5, %o4 | |
| 50 | st %o4, [%sp + 80] | |
| c42d5e98 DM |
51 | ld [%sp + 80], %fsr |
| 52 | st %o2, [%sp + 68] | |
| 53 | fabss %f1, %f14 | |
| 54 | ld [%sp + 68], %f16 | |
| 55 | fcmps %fcc3, %f14, %f16 | |
| 56 | fmovsuge %fcc3, ZERO, %f16 | |
| 57 | fands %f1, SIGN_BIT, SIGN_BIT | |
| 58 | fors %f16, SIGN_BIT, %f16 | |
| 59 | fadds %f1, %f16, %f5 | |
| 60 | fsubs %f5, %f16, %f0 | |
| 61 | fabss %f0, %f0 | |
| 62 | fors %f0, SIGN_BIT, %f0 | |
| 63 | retl | |
| 64 | ld [%sp + 88], %fsr | |
| 65 | END (__nearbyintf) | |
| 3e5efdbd | 66 | libm_alias_float (__nearbyint, nearbyint) |