projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d38cd08c UD |
1 | /* |
| 2 | * Written by J.T. Conklin <jtc@netbsd.org>. | |
| 3 | * Public domain. | |
| 4 | * Adapted for float type by Ulrich Drepper <drepper@cygnus.com>. | |
| 5 | * | |
| 6 | * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <machine/asm.h> | |
| 10 | ||
| 11 | RCSID("$NetBSD: $") | |
| 12 | ||
| 13 | #ifdef __ELF__ | |
| 14 | .section .rodata | |
| 15 | #else | |
| 16 | .text | |
| 17 | #endif | |
| 18 | .align ALIGNARG(4) | |
| 19 | ASM_TYPE_DIRECTIVE(one,@object) | |
| 20 | one: .double 1.0 | |
| 21 | ASM_SIZE_DIRECTIVE(one) | |
| 22 | /* It is not important that this constant is precise. It is only | |
| 23 | a value which is known to be on the safe side for using the | |
| 24 | fyl2xp1 instruction. */ | |
| 25 | ASM_TYPE_DIRECTIVE(limit,@object) | |
| 26 | limit: .double 0.29 | |
| 27 | ASM_SIZE_DIRECTIVE(limit) | |
| 28 | ||
| 29 | ||
| 30 | #ifdef PIC | |
| 31 | #define MO(op) op##@GOTOFF(%edx) | |
| 32 | #else | |
| 33 | #define MO(op) op | |
| 34 | #endif | |
| 35 | ||
| 36 | .text | |
| 37 | ENTRY(__ieee754_log10f) | |
| 38 | fldlg2 // log10(2) | |
| 39 | flds 4(%esp) // x : log10(2) | |
| 40 | #ifdef PIC | |
| 0ecb606c | 41 | LOAD_PIC_REG (dx) |
| d38cd08c | 42 | #endif |
| 15daa639 UD |
43 | fxam |
| 44 | fnstsw | |
| d38cd08c | 45 | fld %st // x : x : log10(2) |
| 15daa639 UD |
46 | sahf |
| 47 |