s_cosl.s

来自「glibc 2.9,最新版的C语言库函数」· S 代码 · 共 33 行

/*
 * Written by J.T. Conklin <[e-mail]>.
 * Public domain.
 *
 * Adapted for `long double' by Ulrich Drepper <[e-mail]>.
 * Adapted for x86-64 by Andreas Jaeger <[e-mail]>.
 */

#include <machine/asm.h>

RCSID("$NetBSD: $")

ENTRY(__cosl)
	fldt	8(%rsp)
	fcos
	fnstsw	%ax
	testl	$0x400,%eax
	jnz	1f
	ret
	.align ALIGNARG(4)
1:	fldpi
	fadd	%st(0)
	fxch	%st(1)
2:	fprem1
	fnstsw	%ax
	testl	$0x400,%eax
	jnz	2b
	fstp	%st(1)
	fcos
	ret
END (__cosl)
weak_alias (__cosl, cosl)