projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* |
| 2 | * Written by J.T. Conklin <jtc@netbsd.org>. | |
| 3 | * Public domain. | |
| d38cd08c UD |
4 | * |
| 5 | * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>. | |
| f7eac6eb RM |
6 | */ |
| 7 | ||
| 8 | #include <machine/asm.h> | |
| 9 | ||
| 10 | RCSID("$NetBSD: e_log10.S,v 1.4 1995/05/08 23:49:24 jtc Exp $") | |
| 11 | ||
| d38cd08c UD |
12 | #ifdef __ELF__ |
| 13 | .section .rodata | |
| 14 | #else | |
| 15 | .text | |
| 16 | #endif | |
| 17 | .align ALIGNARG(4) | |
| 18 | ASM_TYPE_DIRECTIVE(one,@object) | |
| 19 | one: .double 1.0 | |
| 20 | ASM_SIZE_DIRECTIVE(one) | |
| 21 | /* It is not important that this constant is precise. It is only | |
| 22 | a value which is known to be on the safe side for using the | |
| 23 | fyl2xp1 instruction. */ | |
| 24 | ASM_TYPE_DIRECTIVE(limit,@object) | |
| 25 | limit: .double 0.29 | |
| 26 | ASM_SIZE_DIRECTIVE(limit) | |
| 27 | ||
| 28 | ||
| 29 | #ifdef PIC | |
| 30 | #define MO(op) op##@GOTOFF(%edx) | |
| 31 | #else | |
| 32 | #define MO(op) op | |
| 33 | #endif | |
| 34 | ||
| 35 | .text | |
| f7eac6eb | 36 | ENTRY(__ieee754_log10) |
| d38cd08c UD |
37 | fldlg2 // log10(2) |
| 38 | fldl 4(%esp) // x : log10(2) | |
| 39 | #ifdef PIC | |
| a334319f UD |
40 | call 1f |
| 41 | 1: popl %edx | |
| 42 | addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %edx | |
| d38cd08c | 43 | #endif |
| 15daa639 UD |
44 | fxam |
| 45 | fnstsw | |
| d38cd08c | 46 | fld %st // x : x : log10(2) |
| 15daa639 UD |
47 | sahf |
| 48 |