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 | ||
| d38cd08c | 10 | #ifdef __ELF__ |
| 0ac5ae23 | 11 | .section .rodata.cst8,"aM",@progbits,8 |
| d38cd08c UD |
12 | #else |
| 13 | .text | |
| 14 | #endif | |
| 0ac5ae23 | 15 | .p2align 3 |
| d38cd08c UD |
16 | ASM_TYPE_DIRECTIVE(one,@object) |
| 17 | one: .double 1.0 | |
| 18 | ASM_SIZE_DIRECTIVE(one) | |
| 19 | /* It is not important that this constant is precise. It is only | |
| 20 | a value which is known to be on the safe side for using the | |
| 21 | fyl2xp1 instruction. */ | |
| 22 | ASM_TYPE_DIRECTIVE(limit,@object) | |
| 23 | limit: .double 0.29 | |
| 24 | ASM_SIZE_DIRECTIVE(limit) | |
| 25 | ||
| 26 | ||
| 27 | #ifdef PIC | |
| 0ac5ae23 | 28 | # define MO(op) op##@GOTOFF(%edx) |
| d38cd08c | 29 | #else |
| 0ac5ae23 | 30 | # define MO(op) op |
| d38cd08c UD |
31 | #endif |
| 32 | ||
| 33 | .text | |
| f7eac6eb | 34 | ENTRY(__ieee754_log10) |
| d38cd08c UD |
35 | fldlg2 // log10(2) |
| 36 | fldl 4(%esp) // x : log10(2) | |
| 37 | #ifdef PIC | |
| fee732e5 | 38 | LOAD_PIC_REG (dx) |
| d38cd08c | 39 | #endif |
| 15daa639 UD |
40 | fxam |
| 41 | fnstsw | |
| d38cd08c | 42 | fld %st // x : x : log10(2) |
| 15daa639 UD |
43 | sahf |
| 44 |