projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| c9cf6dde | 1 | /* ix87 specific implementation of pow function. |
| 8db73634 | 2 | Copyright (C) 1996, 1997, 1998, 1999, 2001, 2004, 2007, 2011 |
| 8f3edfee | 3 | Free Software Foundation, Inc. |
| c9cf6dde AJ |
4 | This file is part of the GNU C Library. |
| 5 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
| 6 | ||
| 7 | The GNU C Library is free software; you can redistribute it and/or | |
| 8 | modify it under the terms of the GNU Lesser General Public | |
| 9 | License as published by the Free Software Foundation; either | |
| 10 | version 2.1 of the License, or (at your option) any later version. | |
| 11 | ||
| 12 | The GNU C Library is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | Lesser General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU Lesser General Public | |
| 18 | License along with the GNU C Library; if not, write to the Free | |
| 19 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 20 | 02111-1307 USA. */ | |
| 21 | ||
| 22 | #include <machine/asm.h> | |
| 23 | ||
| 24 | #ifdef __ELF__ | |
| 0ac5ae23 | 25 | .section .rodata.cst8,"aM",@progbits,8 |
| c9cf6dde AJ |
26 | #else |
| 27 | .text | |
| 28 | #endif | |
| 0ac5ae23 UD |
29 | .p2align 3 |
| 30 | ASM_TYPE_DIRECTIVE(one,@object) | |
| 31 | one: .double 1.0 | |
| 32 | ASM_SIZE_DIRECTIVE(one) | |
| 33 | ASM_TYPE_DIRECTIVE(limit,@object) | |
| 34 | limit: .double 0.29 | |
| 35 | ASM_SIZE_DIRECTIVE(limit) | |
| 36 | ASM_TYPE_DIRECTIVE(p63,@object) | |
| 37 | p63: .byte 0, 0, 0, 0, 0, 0, 0xe0, 0x43 | |
| 38 | ASM_SIZE_DIRECTIVE(p63) | |
| c9cf6dde | 39 | |
| 0ac5ae23 UD |
40 | #ifdef __ELF__ |
| 41 | .section .rodata.cst16,"aM",@progbits,16 | |
| 42 | #else | |
| 43 | .text | |
| 44 | #endif | |
| 45 | .p2align 3 | |
| c9cf6dde AJ |
46 | ASM_TYPE_DIRECTIVE(infinity,@object) |
| 47 | inf_zero: | |
| 48 | infinity: | |
| 49 | .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f | |
| 50 | ASM_SIZE_DIRECTIVE(infinity) | |
| 51 | ASM_TYPE_DIRECTIVE(zero,@object) | |
| 52 | zero: .double 0.0 | |
| 53 | ASM_SIZE_DIRECTIVE(zero) | |
| 54 | ASM_TYPE_DIRECTIVE(minf_mzero,@object) | |
| 55 | minf_mzero: | |
| 56 | minfinity: | |
| 57 | .byte 0, 0, 0, 0, 0, 0, 0xf0, 0xff | |
| 58 | mzero: | |
| 59 | .byte 0, 0, 0, 0, 0, 0, 0, 0x80 | |
| 60 | ASM_SIZE_DIRECTIVE(minf_mzero) | |
| c9cf6dde AJ |
61 | |
| 62 | #ifdef PIC | |
| 0ac5ae23 | 63 | # define MO(op) op##(%rip) |
| c9cf6dde | 64 | #else |
| 0ac5ae23 | 65 | # define MO(op) op |
| c9cf6dde AJ |
66 | #endif |
| 67 | ||
| 68 | .text | |
| 69 | ENTRY(__ieee754_powl) | |
| 70 | fldt 24(%rsp) // y | |
| 71 | fxam | |
| 72 | ||
| 73 | ||
| 74 | fnstsw | |
| 75 | movb %ah, %dl | |
| 76 | andb $0x45, %ah | |
| 77 | cmpb $0x40, %ah // is y == 0 ? | |
| 78 | je 11f | |
| 79 | ||
| 80 |