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f9f70e68 | 1 | /* Floor function. PowerPC32 version. |
b168057a | 2 | Copyright (C) 2004-2015 Free Software Foundation, Inc. |
f9f70e68 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/>. */ | |
f9f70e68 UD |
18 | |
19 | #include <sysdep.h> | |
f964490f | 20 | #include <math_ldbl_opt.h> |
f9f70e68 | 21 | |
b0e196a4 UD |
22 | .section .rodata.cst4,"aM",@progbits,4 |
23 | .align 2 | |
f9f70e68 | 24 | .LC0: /* 2**52 */ |
b0e196a4 | 25 | .long 0x59800000 |
f9f70e68 UD |
26 | |
27 | .section ".text" | |
28 | ENTRY (__floor) | |
29 | mffs fp11 /* Save current FPU rounding mode. */ | |
30 | #ifdef SHARED | |
31 | mflr r11 | |
a7e91561 | 32 | cfi_register(lr,r11) |
91d2a845 WS |
33 | SETUP_GOT_ACCESS(r9,got_label) |
34 | addis r9,r9,.LC0-got_label@ha | |
35 | lfs fp13,.LC0-got_label@l(r9) | |
a7e91561 UD |
36 | mtlr r11 |
37 | cfi_same_value (lr) | |
f9f70e68 UD |
38 | #else |
39 | lis r9,.LC0@ha | |
b0e196a4 | 40 | lfs fp13,.LC0@l(r9) |
f9f70e68 UD |
41 | #endif |
42 | fabs fp0,fp1 | |
43 | fsub fp12,fp13,fp13 /* generate 0.0 */ | |
44 | fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */ | |
45 | fcmpu cr6,fp1,fp12 /* if (x > 0.0) */ | |
46 | bnllr- cr7 | |
47 | mtfsfi 7,3 /* Set rounding mode toward -inf. */ | |
48 | ble- cr6,.L4 | |
49 | fadd fp1,fp1,fp13 /* x+= TWO52; */ | |
50 | fsub fp1,fp1,fp13 /* x-= TWO52; */ | |
4d37c8aa UD |
51 | fabs fp1,fp1 /* if (x == 0.0) */ |
52 | /* x = 0.0; */ | |
f9f70e68 | 53 | mtfsf 0x01,fp11 /* restore previous rounding mode. */ |
f9f70e68 UD |
54 | blr |
55 | .L4: | |
56 | bge- cr6,.L9 /* if (x < 0.0) */ | |
57 | fsub fp1,fp1,fp13 /* x-= TWO52; */ | |
58 | fadd fp1,fp1,fp13 /* x+= TWO52; */ | |
4d37c8aa UD |
59 | fnabs fp1,fp1 /* if (x == 0.0) */ |
60 | /* x = -0.0; */ | |
f9f70e68 | 61 | .L9: |
9c84384c | 62 | mtfsf 0x01,fp11 /* restore previous rounding mode. */ |
f9f70e68 UD |
63 | blr |
64 | END (__floor) | |
65 | ||
66 | weak_alias (__floor, floor) | |
67 | ||
68 | #ifdef NO_LONG_DOUBLE | |
69 | weak_alias (__floor, floorl) | |
70 | strong_alias (__floor, __floorl) | |
71 | #endif | |
f964490f RM |
72 | #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) |
73 | compat_symbol (libm, __floor, floorl, GLIBC_2_0) | |
74 | #endif |