Lines Matching +full:no +full:- +full:high +full:- +full:z
29 * pio2_1t: pi/2 - pio2_1
31 * pio2_2t: pi/2 - (pio2_1+pio2_2)
33 * pio2_3t: pi/2 - (pio2_1+pio2_2+pio2_3)
39 invpio2 = 6.36619772367581382433e-01, /* 0x3FE45F30, 0x6DC9C883 */
41 pio2_1t = 6.07710050650619224932e-11, /* 0x3DD0B461, 0x1A626331 */
42 pio2_2 = 6.07710050630396597660e-11, /* 0x3DD0B461, 0x1A600000 */
43 pio2_2t = 2.02226624879595063154e-21, /* 0x3BA3198A, 0x2E037073 */
44 pio2_3 = 2.02226624871116645580e-21, /* 0x3BA3198A, 0x2E000000 */
45 pio2_3t = 8.47842766036889956997e-32; /* 0x397B839A, 0x252049C1 */
53 double z,w,t,r,fn;
58 GET_HIGH_WORD(hx,x); /* high word of x */
61 if(ix<=0x3fe921fb) /* |x| ~<= pi/4 , no need for reduction */
66 goto medium; /* cancellation -- use medium case */
69 z = x - pio2_1; /* one round good to 85 bits */
70 y[0] = z - pio2_1t;
71 y[1] = (z-y[0])-pio2_1t;
74 z = x + pio2_1;
75 y[0] = z + pio2_1t;
76 y[1] = (z-y[0])+pio2_1t;
77 return -1;
81 z = x - 2*pio2_1;
82 y[0] = z - 2*pio2_1t;
83 y[1] = (z-y[0])-2*pio2_1t;
86 z = x + 2*pio2_1;
87 y[0] = z + 2*pio2_1t;
88 y[1] = (z-y[0])+2*pio2_1t;
89 return -2;
98 z = x - 3*pio2_1;
99 y[0] = z - 3*pio2_1t;
100 y[1] = (z-y[0])-3*pio2_1t;
103 z = x + 3*pio2_1;
104 y[0] = z + 3*pio2_1t;
105 y[1] = (z-y[0])+3*pio2_1t;
106 return -3;
112 z = x - 4*pio2_1;
113 y[0] = z - 4*pio2_1t;
114 y[1] = (z-y[0])-4*pio2_1t;
117 z = x + 4*pio2_1;
118 y[0] = z + 4*pio2_1t;
119 y[1] = (z-y[0])+4*pio2_1t;
120 return -4;
128 r = x-fn*pio2_1;
131 u_int32_t high;
133 y[0] = r-w;
134 GET_HIGH_WORD(high,y[0]);
135 i = j-((high>>20)&0x7ff);
139 r = t-w;
140 w = fn*pio2_2t-((t-r)-w);
141 y[0] = r-w;
142 GET_HIGH_WORD(high,y[0]);
143 i = j-((high>>20)&0x7ff);
147 r = t-w;
148 w = fn*pio2_3t-((t-r)-w);
149 y[0] = r-w;
153 y[1] = (r-y[0])-w;
160 y[0]=y[1]=x-x; return 0;
162 /* set z = scalbn(|x|,ilogb(x)-23) */
164 e0 = (ix>>20)-1046; /* e0 = ilogb(z)-23; */
165 INSERT_WORDS(z, ix - ((int32_t)((u_int32_t)e0<<20)), low);
167 tx[i] = (double)((int32_t)(z));
168 z = (z-tx[i])*two24;
170 tx[2] = z;
172 while(tx[nx-1]==zero) nx--; /* skip zero term */
174 if(hx<0) {y[0] = -ty[0]; y[1] = -ty[1]; return -n;}