22  * Domain [-0.67434, 0.67434], range ~[-2.25e-22, 1.921e-22]
23  * |tan(x)/x - t(x)| < 2**-71.9
30 T3hi =  0.33333333333333331,		/*  0x15555555555555.0p-54 */
31 T3lo =  1.8350121769317163e-17,		/*  0x15280000000000.0p-108 */
32 T5hi =  0.13333333333333336,		/*  0x11111111111112.0p-55 */
33 T5lo =  1.3051083651294260e-17,		/*  0x1e180000000000.0p-109 */
34 T7hi =  0.053968253968250494,		/*  0x1ba1ba1ba1b827.0p-57 */
35 T7lo =  3.1509625637859973e-18,		/*  0x1d100000000000.0p-111 */
36 pio4_hi =  0.78539816339744828,		/*  0x1921fb54442d18.0p-53 */
37 pio4_lo =  3.0628711372715500e-17,	/*  0x11a80000000000.0p-107 */
38 pio4lo_hi = -1.2541394031670831e-20,	/* -0x1d9cceba3f91f2.0p-119 */
39 pio4lo_lo =  6.1493048227390915e-37;	/*  0x1a280000000000.0p-173 */
47 T3 =   0.333333333333333333180L,	/*  0xaaaaaaaaaaaaaaa5.0p-65 */
48 T5 =   0.133333333333333372290L,	/*  0x88888888888893c3.0p-66 */
49 T7 =   0.0539682539682504975744L,	/*  0xdd0dd0dd0dc13ba2.0p-68 */
50 pio4 = 0.785398163397448309628L,	/*  0xc90fdaa22168c235.0p-64 */
51 pio4lo = -1.25413940316708300586e-20L;	/* -0xece675d1fc8f8cbb.0p-130 */
55 T9  =  0.021869488536312216,		/*  0x1664f4882cc1c2.0p-58 */
56 T11 =  0.0088632355256619590,		/*  0x1226e355c17612.0p-59 */
57 T13 =  0.0035921281113786528,		/*  0x1d6d3d185d7ff8.0p-61 */
58 T15 =  0.0014558334756312418,		/*  0x17da354aa3f96b.0p-62 */
59 T17 =  0.00059003538700862256,		/*  0x13559358685b83.0p-63 */
60 T19 =  0.00023907843576635544,		/*  0x1f56242026b5be.0p-65 */
61 T21 =  0.000097154625656538905,		/*  0x1977efc26806f4.0p-66 */
62 T23 =  0.000038440165747303162,		/*  0x14275a09b3ceac.0p-67 */
63 T25 =  0.000018082171885432524,		/*  0x12f5e563e5487e.0p-68 */
64 T27 =  0.0000024196006108814377,	/*  0x144c0d80cc6896.0p-71 */
65 T29 =  0.0000078293456938132840,	/*  0x106b59141a6cb3.0p-69 */
66 T31 = -0.0000032609076735050182,	/* -0x1b5abef3ba4b59.0p-71 */
67 T33 =  0.0000023261313142559411;	/*  0x13835436c0c87f.0p-71 */
71 	long double z, r, v, w, s;  in __kernel_tanl()  local
75 	iy = (iy == 1 ? -1 : 1);	/* XXX recover original interface */  in __kernel_tanl()
76 	osign = (x >= 0 ? 1.0l : -1.0l);	/* XXX slow, probably wrong for -0 */  in __kernel_tanl()
79 			x = -x;  in __kernel_tanl()
80 			y = -y;  in __kernel_tanl()
82 		z = pio4 - x;  in __kernel_tanl()
83 		w = pio4lo - y;  in __kernel_tanl()
93 …v = z * ((long double)T7 + w * ((long double)T11 + w * ((long double)T15 + w * ((long double)T19 +…  in __kernel_tanl()
96 	r = y + z * (s * (r + v) + y);  in __kernel_tanl()
100 		v = (long double) iy;  in __kernel_tanl()
102 			(v - 2.0L * (x - (w * w / (w + v) - r)));  in __kernel_tanl()
109 		 * -1.0 / (x+r) here  in __kernel_tanl()
111 		/* compute -1.0 / (x+r) accurately */  in __kernel_tanl()
114 		z = z + 0x1p32L - 0x1p32L;  in __kernel_tanl()
115 		v = r - (z - x);	/* z+v = r+x */  in __kernel_tanl()
116 		t = a = -1.0L / w;	/* a = -1.0/w */  in __kernel_tanl()
117 		t = t + 0x1p32L - 0x1p32L;  in __kernel_tanl()
119 		return t + a * (s + t * v);  in __kernel_tanl()