projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* |
| 2 | * Written by J.T. Conklin <jtc@netbsd.org>. | |
| 3 | * Public domain. | |
| 4 | */ | |
| 5 | ||
| 6 | #include <machine/asm.h> | |
| 7 | ||
| 8 | RCSID("$NetBSD: s_log1p.S,v 1.7 1995/05/09 00:10:58 jtc Exp $") | |
| 9 | ||
| d38cd08c UD |
10 | #ifdef __ELF__ |
| 11 | .section .rodata | |
| 12 | #else | |
| 13 | .text | |
| 14 | #endif | |
| 15 | .align ALIGNARG(4) | |
| 16 | /* The fyl2xp1 can only be used for values in | |
| 17 | -1 + sqrt(2) / 2 <= x <= 1 - sqrt(2) / 2 | |
| 18 | 0.29 is a safe value. | |
| 19 | */ | |
| 20 | limit: .double 0.29 | |
| 21 | one: .double 1.0 | |
| 22 | ||
| f7eac6eb | 23 | /* |
| d38cd08c UD |
24 | * Use the fyl2xp1 function when the argument is in the range -0.29 to 0.29, |
| 25 | * otherwise fyl2x with the needed extra computation. | |
| f7eac6eb | 26 | */ |
| d38cd08c | 27 | .text |
| f7eac6eb RM |
28 | ENTRY(__log1p) |
| 29 | fldln2 | |
| d38cd08c UD |
30 | |
| 31 | fldl 4(%esp) | |
| 32 | ||
| 33 | #ifdef PIC | |
| 34 | call 1f | |
| 35 | 1: popl %edx | |
| 36 | addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %edx | |
| 37 | #endif | |
| 38 | ||
| 39 | fld %st | |
| 40 | fabs | |
| 41 | #ifdef PIC | |
| 42 | fcompl limit@GOTOFF(%edx) | |
| 43 | #else | |
| 44 | fcompl limit | |
| 45 | #endif | |
| 46 | fnstsw | |
| 47 | sahf | |
| 48 | jc 2f | |
| 49 | ||
| 50 | #ifdef PIC | |
| 51 | faddl one@GOTOFF(%edx) | |
| 52 | #else | |
| 53 | faddl one | |
| 54 | #endif | |
| f7eac6eb RM |
55 | fyl2x |
| 56 | ret | |
| d38cd08c UD |
57 | |
| 58 | 2: fyl2xp1 | |
| 59 | ret | |
| 60 | ||
| 61 | END (__log1p) | |
| f7eac6eb | 62 | weak_alias (__log1p, log1p) |