| * software is freely granted, provided that this notice |
| * |
| * return the remainder of x rem pi/2 in y[0]+y[1] |
| * Table of constants for 2/pi, 396 Hex digits (476 decimal) of 2/pi |
| static const int32_t two_over_pi[] = { |
| static int32_t two_over_pi[] = { |
| 0xA2F983, 0x6E4E44, 0x1529FC, 0x2757D1, 0xF534DD, 0xC0DB62, |
| 0x95993C, 0x439041, 0xFE5163, 0xABDEBB, 0xC561B7, 0x246E3A, |
| 0x424DD2, 0xE00649, 0x2EEA09, 0xD1921C, 0xFE1DEB, 0x1CB129, |
| 0xA73EE8, 0x8235F5, 0x2EBB44, 0x84E99C, 0x7026B4, 0x5F7E41, |
| 0x3991D6, 0x398353, 0x39F49C, 0x845F8B, 0xBDF928, 0x3B1FF8, |
| 0x97FFDE, 0x05980F, 0xEF2F11, 0x8B5A0A, 0x6D1F6D, 0x367ECF, |
| 0x27CB09, 0xB74F46, 0x3F669E, 0x5FEA2D, 0x7527BA, 0xC7EBE5, |
| 0xF17B3D, 0x0739F7, 0x8A5292, 0xEA6BFB, 0x5FB11F, 0x8D5D08, |
| 0x560330, 0x46FC7B, 0x6BABF0, 0xCFBC20, 0x9AF436, 0x1DA9E3, |
| 0x91615E, 0xE61B08, 0x659985, 0x5F14A0, 0x68408D, 0xFFD880, |
| 0x4D7327, 0x310606, 0x1556CA, 0x73A8C9, 0x60E27B, 0xC08C6B, |
| static const int32_t npio2_hw[] = { |
| static int32_t npio2_hw[] = { |
| static const double |
| static double |
| int32_t __ieee754_rem_pio2(double x, double *y) |
| int32_t __ieee754_rem_pio2(x,y) |
| int32_t i,j,n,ix,hx; |
| uint32_t low; |
| if(hx>0) { |
| n = (int32_t) (t*invpio2+half); |
| if(n<32&&ix!=npio2_hw[n-1]) { |
| uint32_t high; |
| y[0] = r-w; |
| w = fn*pio2_2; |
| w = fn*pio2_2t-((t-r)-w); |
| w = fn*pio2_3; |
| w = fn*pio2_3t-((t-r)-w); |
| /* |
| SET_HIGH_WORD(z, ix - ((int32_t)e0<<20)); |
| tx[i] = (double)((int32_t)(z)); |
