crmvec/crmvec-atan2-tab.h at main · anun333/crmvec · GitHub

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/* copied verbatim from CORE-MATH src/binary64/atan2/atan2.c (MIT; see atan2/ here): cr_atan2's
   f2 (atan(j/64) as {lo, hi}) and O (the quadrant offsets); its T2[j] is j/64 exactly */
static const double ATAN2_F2[65][2] = {
    {0x0p+0, 0x0p+0}, {-0x1.95220c39d4dffp-53, 0x1.fff555bbb73p-7},
    {0x1.2542779d776dep-53, 0x1.ffd55bba976p-6}, {-0x1.6061bbe3de53cp-53, 0x1.7fb818430da4p-5},
    {-0x1.639269b0da47ep-53, 0x1.ff55bb72cfep-5}, {-0x1.4a7663af440f7p-55, 0x1.3f59f0e7c55ap-4},
    {0x1.d1824d59f9e13p-53, 0x1.7ee182602f1p-4}, {0x1.bef71e5340b31p-55, 0x1.be39ebe6f07cp-4},
    {0x1.b8cb225e627dp-53, 0x1.fd5ba9aac2f6p-4}, {0x1.b92de9bac94c2p-53, 0x1.1e1fafb04372p-3},
    {-0x1.d3cb89e62dafdp-54, 0x1.3d6eee8c6627p-3}, {-0x1.882a55960087ap-53, 0x1.5c9811e3ec27p-3},
    {0x1.1347b0b4f881dp-54, 0x1.7b97b4bce5bp-3}, {0x1.873d8079ed0d2p-53, 0x1.9a6a8e96c862p-3},
    {0x1.022f621a5c1cbp-54, 0x1.b90d7529260ap-3}, {0x1.9c648d1534598p-53, 0x1.d77d5df20573p-3},
    {-0x1.4ea9238610a08p-54, 0x1.f5b75f92c80ep-3}, {0x1.2c5c8e721970dp-53, 0x1.09dc597d8636p-2},
    {0x1.30ca4748b1bf9p-57, 0x1.18bf5a30bf178p-2}, {-0x1.20ef9ba6dbf9p-53, 0x1.278372057ef48p-2},
    {0x1.e69c5abb498d2p-53, 0x1.362773707ebc8p-2}, {0x1.a8a86f0ea9311p-54, 0x1.44aa436c2af08p-2},
    {0x1.db5336feef7fp-54, 0x1.530ad9951cd48p-2}, {0x1.9636a3aa3b84p-54, 0x1.614840309cfep-2},
    {0x1.1ce2a8c848b74p-55, 0x1.6f61941e4defp-2}, {-0x1.4b1bbd1ea6db3p-55, 0x1.7d5604b63b3f8p-2},
    {-0x1.4925e8b916e0bp-53, 0x1.8b24d394a1b28p-2}, {0x1.9e6c988fd0a77p-56, 0x1.98cd5454d6b18p-2},
    {-0x1.a49bd836a17p-53, 0x1.a64eec3cc24p-2}, {-0x1.ca3cf09c6b5f8p-53, 0x1.b3a911da65c7p-2},
    {-0x1.cc1ce70934c34p-56, 0x1.c0db4c94ec9fp-2}, {0x1.2e982ddf3872ap-55, 0x1.cde53432c135p-2},
    {-0x1.2ea406ee84d0fp-55, 0x1.dac670561bb5p-2}, {-0x1.de35847c81979p-53, 0x1.e77eb7f175a38p-2},
    {-0x1.a3992dc382a23p-57, 0x1.f40dd0b541418p-2}, {-0x1.b32c949c9d593p-55, 0x1.0039c73c1a40cp-1},
    {-0x1.d5b495f6349e6p-56, 0x1.0657e94db30dp-1}, {-0x1.f34582f6255fep-53, 0x1.0c6145b5b43dcp-1},
    {0x1.ed42511e3f11dp-54, 0x1.1255d9bfbd2a8p-1}, {-0x1.1cef189ff9e7fp-54, 0x1.1835a88be7c14p-1},
    {-0x1.928df287a668fp-58, 0x1.1e00babdefeb4p-1}, {-0x1.e3bde360c7ddbp-53, 0x1.23b71e2cc9e6cp-1},
    {0x1.bd86313ce4fdep-54, 0x1.2958e59308e3p-1}, {-0x1.8e8a85803cc1dp-53, 0x1.2ee628406cbccp-1},
    {-0x1.77ef7641c777fp-54, 0x1.345f01cce37bcp-1}, {0x1.b73ef3389d02fp-53, 0x1.39c391cd41718p-1},
    {0x1.ecf8b492644fp-56, 0x1.3f13fb89e96f4p-1}, {0x1.c1125fd3810c7p-53, 0x1.445065b795b54p-1},
    {0x1.2483350fe548bp-53, 0x1.4978fa3269eep-1}, {0x1.4a33dbeb3796cp-55, 0x1.4e8de5bb6ec04p-1},
    {-0x1.46edd2af69483p-53, 0x1.538f57b89062p-1}, {-0x1.2bcb93b18b52ap-53, 0x1.587d81f732fbcp-1},
    {0x1.0028e4bc5e7cap-57, 0x1.5d58987169b18p-1}, {0x1.ed487acaf1174p-53, 0x1.6220d115d7b8cp-1},
    {-0x1.2dd4dfd7d1777p-53, 0x1.66d663923e088p-1}, {0x1.2bfe3cf3b9d79p-54, 0x1.6b798920b3d98p-1},
    {-0x1.8c34d25aadef6p-56, 0x1.700a7c5784634p-1}, {-0x1.f426acf4d3bdbp-54, 0x1.748978fba8e1p-1},
    {-0x1.afe57dd9ff23p-53, 0x1.78f6bbd5d316p-1}, {-0x1.54fbef0e862abp-54, 0x1.7d528289fa094p-1},
    {0x1.90227758b11bap-54, 0x1.819d0b7158a4cp-1}, {0x1.16b66e7fc8b8cp-53, 0x1.85d69576cc2c4p-1},
    {-0x1.55b9a5e177a1bp-55, 0x1.89ff5ff57f1f8p-1}, {0x1.c27cfaa9f7a14p-53, 0x1.8e17aa99cc05cp-1},
    {0x1.1a62633145c07p-55, 0x1.921fb54442d18p-1}};
static const double ATAN2_O[8][2] = {
    {0,0}, {0x1.921fb54442d18p+0,0x1.1a62633145c07p-54},
    {0,0}, {-0x1.921fb54442d18p+0,-0x1.1a62633145c07p-54},
    {0x1.921fb54442d18p+1,0x1.1a62633145c07p-53}, {0x1.921fb54442d18p+0,0x1.1a62633145c07p-54},
    {-0x1.921fb54442d18p+1,-0x1.1a62633145c07p-53}, {-0x1.921fb54442d18p+0,-0x1.1a62633145c07p-54}};