/* satan.s - Motorola 68040 FP arc-tangent routines (EXC) *//* Copyright 1991-1993 Wind River Systems, Inc. */	.data	.globl	_copyright_wind_river	.long	_copyright_wind_river/*modification history--------------------01e,21jul93,kdl  added .text (SPR #2372).01d,23aug92,jcf  changed bxxx to jxx.01c,26may92,rrr  the tree shuffle01b,10jan92,kdl  added modification history; general cleanup.01a,15aug91,kdl  original version, from Motorola FPSP v2.0.*//*DESCRIPTION	__x_satansa 3.3 12/19/90	The entry point __x_satan computes the arctagent of an	input value. __x_satand does the same except the input value is a	denormalized number.	Input: Double-extended value in memory location pointed to by address		register a0.	Output:	Arctan(X) returned in floating-point register Fp0.	Accuracy and Monotonicity: The returned result is within 2 ulps in		64 significant bit, i.e. within 0.5001 ulp to 53 bits if the		result is subsequently rounded to double precision. The		result is provably monotonic in double precision.	Speed: The program __x_satan takes approximately 160 cycles for input		argument X such that 1/16 < |X| < 16. For the other arguments,		the program will run no worse than 10 slower.	Algorithm:	Step 1. If |X| >= 16 or |X| < 1/16, go to Step 5.	Step 2. Let X = sgn * 2**k * 1xxxxxxxx...x. Note that k = -4, -3,...,		or 3.		Define F = sgn * 2**k * 1xxxx1, i.e. the first 5 significant		bits of X with a bit-1 attached at the 6-th bit position.		Define u to be u = (X-F) / (1 + X*F).	Step 3. Approximate arctan(u) by a polynomial poly.	Step 4. Return arctan(F) + poly, arctan(F) is fetched from a table		of values calculated beforehand. Exit.	Step 5. If |X| >= 16, go to Step 7.	Step 6. Approximate arctan(X) by an odd polynomial in X. Exit.	Step 7. Define X' = -1/X. Approximate arctan(X') by an odd polynomial		in X'.		Arctan(X) = sign(X)*Pi/2 + arctan(X'). Exit.		Copyright (C) Motorola, Inc. 1990			All Rights Reserved	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA	The copyright notice above does not evidence any	actual or intended publication of such source code.__x_satan	IDNT	2,1 Motorola 040 Floating Point Software Package	section	8NOMANUAL*/#include "fpsp040E.h"BOUNDS1:	.long 0x3FFB8000,0x4002FFFFONE:	.long 0x3F800000	.long 0x00000000ATANA3:	.long 0xBFF6687E,0x314987D8ATANA2:	.long 0x4002AC69,0x34A26DB3ATANA1:	.long 0xBFC2476F,0x4E1DA28EATANB6:	.long 0x3FB34444,0x7F876989ATANB5:	.long 0xBFB744EE,0x7FAF45DBATANB4:	.long 0x3FBC71C6,0x46940220ATANB3:	.long 0xBFC24924,0x921872F9ATANB2:	.long 0x3FC99999,0x99998FA9ATANB1:	.long 0xBFD55555,0x55555555ATANC5:	.long 0xBFB70BF3,0x98539E6AATANC4:	.long 0x3FBC7187,0x962D1D7DATANC3:	.long 0xBFC24924,0x827107B8ATANC2:	.long 0x3FC99999,0x9996263EATANC1:	.long 0xBFD55555,0x55555536PPIBY2:	.long 0x3FFF0000,0xC90FDAA2,0x2168C235,0x00000000NPIBY2:	.long 0xBFFF0000,0xC90FDAA2,0x2168C235,0x00000000PTINY:	.long 0x00010000,0x80000000,0x00000000,0x00000000NTINY:	.long 0x80010000,0x80000000,0x00000000,0x00000000ATANTBL:	.long	0x3FFB0000,0x83D152C5,0x060B7A51,0x00000000	.long	0x3FFB0000,0x8BC85445,0x65498B8B,0x00000000	.long	0x3FFB0000,0x93BE4060,0x17626B0D,0x00000000	.long	0x3FFB0000,0x9BB3078D,0x35AEC202,0x00000000	.long	0x3FFB0000,0xA3A69A52,0x5DDCE7DE,0x00000000	.long	0x3FFB0000,0xAB98E943,0x62765619,0x00000000	.long	0x3FFB0000,0xB389E502,0xF9C59862,0x00000000	.long	0x3FFB0000,0xBB797E43,0x6B09E6FB,0x00000000	.long	0x3FFB0000,0xC367A5C7,0x39E5F446,0x00000000	.long	0x3FFB0000,0xCB544C61,0xCFF7D5C6,0x00000000	.long	0x3FFB0000,0xD33F62F8,0x2488533E,0x00000000	.long	0x3FFB0000,0xDB28DA81,0x62404C77,0x00000000	.long	0x3FFB0000,0xE310A407,0x8AD34F18,0x00000000	.long	0x3FFB0000,0xEAF6B0A8,0x188EE1EB,0x00000000	.long	0x3FFB0000,0xF2DAF194,0x9DBE79D5,0x00000000	.long	0x3FFB0000,0xFABD5813,0x61D47E3E,0x00000000	.long	0x3FFC0000,0x8346AC21,0x0959ECC4,0x00000000	.long	0x3FFC0000,0x8B232A08,0x304282D8,0x00000000	.long	0x3FFC0000,0x92FB70B8,0xD29AE2F9,0x00000000	.long	0x3FFC0000,0x9ACF476F,0x5CCD1CB4,0x00000000	.long	0x3FFC0000,0xA29E7630,0x4954F23F,0x00000000	.long	0x3FFC0000,0xAA68C5D0,0x8AB85230,0x00000000	.long	0x3FFC0000,0xB22DFFFD,0x9D539F83,0x00000000	.long	0x3FFC0000,0xB9EDEF45,0x3E900EA5,0x00000000	.long	0x3FFC0000,0xC1A85F1C,0xC75E3EA5,0x00000000	.long	0x3FFC0000,0xC95D1BE8,0x28138DE6,0x00000000	.long	0x3FFC0000,0xD10BF300,0x840D2DE4,0x00000000	.long	0x3FFC0000,0xD8B4B2BA,0x6BC05E7A,0x00000000	.long	0x3FFC0000,0xE0572A6B,0xB42335F6,0x00000000	.long	0x3FFC0000,0xE7F32A70,0xEA9CAA8F,0x00000000	.long	0x3FFC0000,0xEF888432,0x64ECEFAA,0x00000000	.long	0x3FFC0000,0xF7170A28,0xECC06666,0x00000000	.long	0x3FFD0000,0x812FD288,0x332DAD32,0x00000000	.long	0x3FFD0000,0x88A8D1B1,0x218E4D64,0x00000000	.long	0x3FFD0000,0x9012AB3F,0x23E4AEE8,0x00000000	.long	0x3FFD0000,0x976CC3D4,0x11E7F1B9,0x00000000	.long	0x3FFD0000,0x9EB68949,0x3889A227,0x00000000	.long	0x3FFD0000,0xA5EF72C3,0x4487361B,0x00000000	.long	0x3FFD0000,0xAD1700BA,0xF07A7227,0x00000000	.long	0x3FFD0000,0xB42CBCFA,0xFD37EFB7,0x00000000	.long	0x3FFD0000,0xBB303A94,0x0BA80F89,0x00000000	.long	0x3FFD0000,0xC22115C6,0xFCAEBBAF,0x00000000	.long	0x3FFD0000,0xC8FEF3E6,0x86331221,0x00000000	.long	0x3FFD0000,0xCFC98330,0xB4000C70,0x00000000	.long	0x3FFD0000,0xD6807AA1,0x102C5BF9,0x00000000	.long	0x3FFD0000,0xDD2399BC,0x31252AA3,0x00000000	.long	0x3FFD0000,0xE3B2A855,0x6B8FC517,0x00000000	.long	0x3FFD0000,0xEA2D764F,0x64315989,0x00000000	.long	0x3FFD0000,0xF3BF5BF8,0xBAD1A21D,0x00000000	.long	0x3FFE0000,0x801CE39E,0x0D205C9A,0x00000000	.long	0x3FFE0000,0x8630A2DA,0xDA1ED066,0x00000000	.long	0x3FFE0000,0x8C1AD445,0xF3E09B8C,0x00000000	.long	0x3FFE0000,0x91DB8F16,0x64F350E2,0x00000000	.long	0x3FFE0000,0x97731420,0x365E538C,0x00000000	.long	0x3FFE0000,0x9CE1C8E6,0xA0B8CDBA,0x00000000	.long	0x3FFE0000,0xA22832DB,0xCADAAE09,0x00000000	.long	0x3FFE0000,0xA746F2DD,0xB7602294,0x00000000	.long	0x3FFE0000,0xAC3EC0FB,0x997DD6A2,0x00000000	.long	0x3FFE0000,0xB110688A,0xEBDC6F6A,0x00000000	.long	0x3FFE0000,0xB5BCC490,0x59ECC4B0,0x00000000	.long	0x3FFE0000,0xBA44BC7D,0xD470782F,0x00000000	.long	0x3FFE0000,0xBEA94144,0xFD049AAC,0x00000000	.long	0x3FFE0000,0xC2EB4ABB,0x661628B6,0x00000000	.long	0x3FFE0000,0xC70BD54C,0xE602EE14,0x00000000	.long	0x3FFE0000,0xCD000549,0xADEC7159,0x00000000	.long	0x3FFE0000,0xD48457D2,0xD8EA4EA3,0x00000000	.long	0x3FFE0000,0xDB948DA7,0x12DECE3B,0x00000000	.long	0x3FFE0000,0xE23855F9,0x69E8096A,0x00000000	.long	0x3FFE0000,0xE8771129,0xC4353259,0x00000000	.long	0x3FFE0000,0xEE57C16E,0x0D379C0D,0x00000000	.long	0x3FFE0000,0xF3E10211,0xA87C3779,0x00000000	.long	0x3FFE0000,0xF919039D,0x758B8D41,0x00000000	.long	0x3FFE0000,0xFE058B8F,0x64935FB3,0x00000000	.long	0x3FFF0000,0x8155FB49,0x7B685D04,0x00000000	.long	0x3FFF0000,0x83889E35,0x49D108E1,0x00000000	.long	0x3FFF0000,0x859CFA76,0x511D724B,0x00000000	.long	0x3FFF0000,0x87952ECF,0xFF8131E7,0x00000000	.long	0x3FFF0000,0x89732FD1,0x9557641B,0x00000000	.long	0x3FFF0000,0x8B38CAD1,0x01932A35,0x00000000	.long	0x3FFF0000,0x8CE7A8D8,0x301EE6B5,0x00000000	.long	0x3FFF0000,0x8F46A39E,0x2EAE5281,0x00000000	.long	0x3FFF0000,0x922DA7D7,0x91888487,0x00000000	.long	0x3FFF0000,0x94D19FCB,0xDEDF5241,0x00000000	.long	0x3FFF0000,0x973AB944,0x19D2A08B,0x00000000	.long	0x3FFF0000,0x996FF00E,0x08E10B96,0x00000000	.long	0x3FFF0000,0x9B773F95,0x12321DA7,0x00000000	.long	0x3FFF0000,0x9D55CC32,0x0F935624,0x00000000	.long	0x3FFF0000,0x9F100575,0x006CC571,0x00000000	.long	0x3FFF0000,0xA0A9C290,0xD97CC06C,0x00000000	.long	0x3FFF0000,0xA22659EB,0xEBC0630A,0x00000000	.long	0x3FFF0000,0xA388B4AF,0xF6EF0EC9,0x00000000	.long	0x3FFF0000,0xA4D35F10,0x61D292C4,0x00000000	.long	0x3FFF0000,0xA60895DC,0xFBE3187E,0x00000000	.long	0x3FFF0000,0xA72A51DC,0x7367BEAC,0x00000000	.long	0x3FFF0000,0xA83A5153,0x0956168F,0x00000000	.long	0x3FFF0000,0xA93A2007,0x7539546E,0x00000000	.long	0x3FFF0000,0xAA9E7245,0x023B2605,0x00000000	.long	0x3FFF0000,0xAC4C84BA,0x6FE4D58F,0x00000000	.long	0x3FFF0000,0xADCE4A4A,0x606B9712,0x00000000	.long	0x3FFF0000,0xAF2A2DCD,0x8D263C9C,0x00000000	.long	0x3FFF0000,0xB0656F81,0xF22265C7,0x00000000	.long	0x3FFF0000,0xB1846515,0x0F71496A,0x00000000	.long	0x3FFF0000,0xB28AAA15,0x6F9ADA35,0x00000000	.long	0x3FFF0000,0xB37B44FF,0x3766B895,0x00000000	.long	0x3FFF0000,0xB458C3DC,0xE9630433,0x00000000	.long	0x3FFF0000,0xB525529D,0x562246BD,0x00000000	.long	0x3FFF0000,0xB5E2CCA9,0x5F9D88CC,0x00000000	.long	0x3FFF0000,0xB692CADA,0x7ACA1ADA,0x00000000	.long	0x3FFF0000,0xB736AEA7,0xA6925838,0x00000000	.long	0x3FFF0000,0xB7CFAB28,0x7E9F7B36,0x00000000	.long	0x3FFF0000,0xB85ECC66,0xCB219835,0x00000000	.long	0x3FFF0000,0xB8E4FD5A,0x20A593DA,0x00000000	.long	0x3FFF0000,0xB99F41F6,0x4AFF9BB5,0x00000000	.long	0x3FFF0000,0xBA7F1E17,0x842BBE7B,0x00000000	.long	0x3FFF0000,0xBB471285,0x7637E17D,0x00000000	.long	0x3FFF0000,0xBBFABE8A,0x4788DF6F,0x00000000	.long	0x3FFF0000,0xBC9D0FAD,0x2B689D79,0x00000000	.long	0x3FFF0000,0xBD306A39,0x471ECD86,0x00000000	.long	0x3FFF0000,0xBDB6C731,0x856AF18A,0x00000000	.long	0x3FFF0000,0xBE31CAC5,0x02E80D70,0x00000000	.long	0x3FFF0000,0xBEA2D55C,0xE33194E2,0x00000000	.long	0x3FFF0000,0xBF0B10B7,0xC03128F0,0x00000000	.long	0x3FFF0000,0xBF6B7A18,0xDACB778D,0x00000000	.long	0x3FFF0000,0xBFC4EA46,0x63FA18F6,0x00000000	.long	0x3FFF0000,0xC0181BDE,0x8B89A454,0x00000000	.long	0x3FFF0000,0xC065B066,0xCFBF6439,0x00000000	.long	0x3FFF0000,0xC0AE345F,0x56340AE6,0x00000000	.long	0x3FFF0000,0xC0F22291,0x9CB9E6A7,0x00000000#define	X		FP_SCR1#define	XDCARE		X+2#define	XFRAC		X+4#define	XFRACLO		X+8#define	ATANF		FP_SCR2#define	ATANFHI		ATANF+4#define	ATANFLO		ATANF+8|	xref	__x_t_frcinx|	xref	__x_t_extdnrm