about summary refs log tree commit diff
path: root/sysdeps/i386/fpu/s_tanf.S
blob: 74bc22fcebfc497c1bde5682a4901088d20b7113 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Fixed errno handling by Ulrich Drepper <drepper@redhat.com>.
 * Public domain.
 */

#define __need_Emath
#include <bits/errno.h>
#include <machine/asm.h>

RCSID("$NetBSD: s_tanf.S,v 1.3 1995/05/09 00:31:09 jtc Exp $")

ENTRY(__tanf)
	flds	4(%esp)
	fxam
	fstsw	%ax
	movb	$0x45, %dh
	andb	%ah, %dh
	cmpb	$0x05, %dh
	je	3f
4:	fptan
	fnstsw	%ax
	testl	$0x400,%eax
	jnz	1f
	fstp	%st(0)
	ret
1:	fldpi
	fadd	%st(0)
	fxch	%st(1)
2:	fprem1
	fstsw	%ax
	testl	$0x400,%eax
	jnz	2b
	fstp	%st(1)
	fptan
	fstp	%st(0)
	ret
3:
#ifdef PIC
	pushl	%ebx
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (ebx, 0)
	LOAD_PIC_REG (bx)
	call	__errno_location@PLT
	movl	$EDOM, (%eax)
	popl	%ebx
	cfi_adjust_cfa_offset (-4)
	cfi_restore (ebx)
#else
	call	__errno_location@PLT
	movl	$EDOM, (%eax)
#endif
	jmp	4b
END (__tanf)
weak_alias (__tanf, tanf)