Lines Matching refs:X

8 |	Input: Double-extended number X in location pointed to
11 |	Output: The value arcsin(X) returned in floating-point register Fp0.
23 |	1. If |X| >= 1, go to 3.
25 |	2. (|X| < 1) Calculate asin(X) by
26 |		z := sqrt( [1-X][1+X] )
27 |		asin(X) = atan( x / z ).
30 |	3. If |X| > 1, go to 5.
32 |	4. (|X| = 1) sgn := sign(X), return asin(X) := sgn * Pi/2. Exit.
34 |	5. (|X| > 1) Generate an invalid operation by 0 * infinity.
57 |--ASIN(X) = X FOR DENORMALIZED X
71 |--THIS IS THE USUAL CASE, |X| < 1
72 |--ASIN(X) = ATAN( X / SQRT( (1-X)(1+X) ) )
75 	fsubx		%fp0,%fp1		| ...1-X
78 	faddx		%fp0,%fp2		| ...1+X
79 	fmulx		%fp2,%fp1		| ...(1+X)(1-X)
81 	fsqrtx		%fp1		| ...SQRT([1-X][1+X])
82 	fdivx		%fp1,%fp0		| ...X/SQRT([1-X][1+X])
88 	fabsx		%fp0	 | ...|X|
92 |--|X| = 1, ASIN(X) = +- PI/2.
96 	andil		#0x80000000,%d0	| ...SIGN BIT OF X
98 	movel		%d0,-(%sp)	| ...push SIGN(X) IN SGL-FMT