projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 6bc31da0 | 1 | /* ix87 specific implementation of pow function. |
| b168057a | 2 | Copyright (C) 1996-2015 Free Software Foundation, Inc. |
| 6bc31da0 UD |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 6bc31da0 UD |
10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| 6bc31da0 | 15 | |
| 41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 6bc31da0 UD |
19 | |
| 20 | #include <machine/asm.h> | |
| 21 | ||
| 0ac5ae23 | 22 | .section .rodata.cst8,"aM",@progbits,8 |
| 622c86f4 | 23 | |
| 0ac5ae23 | 24 | .p2align 3 |
| b67e9372 | 25 | .type one,@object |
| 0ac5ae23 UD |
26 | one: .double 1.0 |
| 27 | ASM_SIZE_DIRECTIVE(one) | |
| 1bead169 JM |
28 | .type p3,@object |
| 29 | p3: .byte 0, 0, 0, 0, 0, 0, 0x20, 0x40 | |
| 30 | ASM_SIZE_DIRECTIVE(p3) | |
| b67e9372 | 31 | .type p63,@object |
| 0ac5ae23 UD |
32 | p63: .byte 0, 0, 0, 0, 0, 0, 0xe0, 0x43 |
| 33 | ASM_SIZE_DIRECTIVE(p63) | |
| b67e9372 | 34 | .type p64,@object |
| 2460d3aa JM |
35 | p64: .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x43 |
| 36 | ASM_SIZE_DIRECTIVE(p64) | |
| b67e9372 | 37 | .type p78,@object |
| 8f9a2fae JM |
38 | p78: .byte 0, 0, 0, 0, 0, 0, 0xd0, 0x44 |
| 39 | ASM_SIZE_DIRECTIVE(p78) | |
| 60e235ee JM |
40 | .type pm79,@object |
| 41 | pm79: .byte 0, 0, 0, 0, 0, 0, 0, 0x3b | |
| 42 | ASM_SIZE_DIRECTIVE(pm79) | |
| 6bc31da0 | 43 | |
| 0ac5ae23 | 44 | .section .rodata.cst16,"aM",@progbits,16 |
| 622c86f4 | 45 | |
| 0ac5ae23 | 46 | .p2align 3 |
| b67e9372 | 47 | .type infinity,@object |
| 0d8733c4 UD |
48 | inf_zero: |
| 49 | infinity: | |
| 50 | .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f | |
| 51 | ASM_SIZE_DIRECTIVE(infinity) | |
| b67e9372 | 52 | .type zero,@object |
| 0d8733c4 UD |
53 | zero: .double 0.0 |
| 54 | ASM_SIZE_DIRECTIVE(zero) | |
| b67e9372 | 55 | .type minf_mzero,@object |
| 0d8733c4 UD |
56 | minf_mzero: |
| 57 | minfinity: | |
| 58 | .byte 0, 0, 0, 0, 0, 0, 0xf0, 0xff | |
| 59 | mzero: | |
| 60 | .byte 0, 0, 0, 0, 0, 0, 0, 0x80 | |
| 61 | ASM_SIZE_DIRECTIVE(minf_mzero) | |
| 6bc31da0 UD |
62 | |
| 63 | #ifdef PIC | |
| 0ac5ae23 UD |
64 | # define MO(op) op##@GOTOFF(%ecx) |
| 65 | # define MOX(op,x,f) op##@GOTOFF(%ecx,x,f) | |
| 6bc31da0 | 66 | #else |
| 0ac5ae23 UD |
67 | # define MO(op) op |
| 68 | # define MOX(op,x,f) op(,x,f) | |
| 6bc31da0 UD |
69 | #endif |
| 70 | ||
| 71 | .text | |
| 72 | ENTRY(__ieee754_powl) | |
| 0d8733c4 UD |
73 | fldt 16(%esp) // y |
| 74 | fxam | |
| e61abf83 UD |
75 | |
| 76 | #ifdef PIC | |
| fee732e5 | 77 | LOAD_PIC_REG (cx) |
| e61abf83 UD |
78 | #endif |
| 79 | ||
| 0d8733c4 UD |
80 | fnstsw |
| 81 | movb %ah, %dl | |
| 82 | andb $0x45, %ah | |
| 83 | cmpb $0x40, %ah // is y == 0 ? | |
| 84 | je 11f | |
| 85 | ||
| 86 |