minix/lib/nbsd_libm/arch/i387/s_tan.S
Gianluca Guida 0dc9e0996a Import unmodified NetBSD's libm for compiling with new libc.
As the current libc includes a libm implementation, with the new libc
this is needed. Unneeded (for the moment) archs have been removed.
2011-03-18 15:52:16 +00:00

33 lines
463 B
ArmAsm

/*
* Written by J.T. Conklin <jtc@NetBSD.org>.
* Public domain.
*/
#include <machine/asm.h>
#include "abi.h"
RCSID("$NetBSD: s_tan.S,v 1.7 2003/07/26 19:25:04 salo Exp $")
ENTRY(tan)
XMM_ONE_ARG_DOUBLE_PROLOGUE
fldl ARG_DOUBLE_ONE
fptan
fnstsw %ax
andw $0x400,%ax
jnz 1f
fstp %st(0)
XMM_DOUBLE_EPILOGUE
ret
1: fldpi
fadd %st(0)
fxch %st(1)
2: fprem1
fstsw %ax
andw $0x400,%ax
jnz 2b
fstp %st(1)
fptan
fstp %st(0)
XMM_DOUBLE_EPILOGUE
ret