user: 请从给定的汇编指令推导出C源代码:

```asm
<icost>:
  endbr64
  mov    %edi,%edx
  lea    D8(%rip),%rax
  and    $0x7ff,%edx
  mov    (%rax,%rdx,4),%eax
  mov    %eax,%edx
  neg    %edx
  and    $0x800,%edi
  cmovne %edx,%eax
  ret
```

tool_calls: name: unpack_data
arguments: tag: D8
datatype: string

tool: 

assistant: ```c
int icost(int dd) {
  static int t[2048] = {
      1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1022, 1022, 1022, 1022, 1022, 1022, 1022, 1022, 1022, 1022, 1021, 1021, 1021, 1021, 1021, 1021, 1021, 1021, 1020, 1020, 1020, 1020, 1020, 1020, 1020, 1020, 1019, 1019, 1019, 1019, 1019, 1019, 1018, 1018, 1018, 1018, 1018, 1018, 1017, 1017, 1017, 1017, 1017, 1016, 1016, 1016, 1016, 1016, 1016, 1015, 1015, 1015, 1015, 1014, 1014, 1014, 1014, 1014, 1013, 1013, 1013, 1013, 1012, 1012, 1012, 1012, 1011, 1011, 1011, 1011, 1010, 1010, 1010, 1010, 1009, 1009, 1009, 1009, 1008, 1008, 1008, 1008, 1007, 1007, 1007, 1006, 1006, 1006, 1006, 1005, 1005, 1005, 1004, 1004, 1004, 1003, 1003, 1003, 1002, 1002, 1002, 1001, 1001, 1001, 1000, 1000, 1000, 999,  999,  999,  998,  998,  998,  997,  997,  997,  996,  996,  996,  995,  995,  994,  994,  994,  993,  993,  993,  992,  992,  991,  991,  991,  990,  990,  989,  989,  989,  988,  988,  987,  987,  986,  986,  986,  985,  985,  984,  984,  983,  983,  983,  982,  982,  981,  981,  980,  980,  979,  979,  979,  978,  978,  977,  977,  976,  976,  975,  975,  974,  974,  973,  973,  972,  972,  971,  971,  970,  970,  969,  969,  968,  968,  967,  967,  966,  966,  965,  965,  964,  964,  963,  963,  962,  961,  961,  960,  960,  959,  959,  958,  958,  957,  957,  956,  955,  955,  954,  954,  953,  953,  952,  951,  951,  950,  950,  949,  948,  948,  947,  947,  946,  945,  945,  944,  944,  943,  942,  942,  941,  941,  940,  939,  939,  938,  937,  937,  936,  936,  935,  934,  934,  933,  932,  932,  931,  930,  930,  929,  928,  928,  927,  926,  926,  925,  924,  924,  923,  922,  922,  921,  920,  920,  919,  918,  917,  917,  916,  915,  915,  914,  913,  913,  912,  911,  910,  910,  909,  908,  907,  907,  906,  905,  905,  904,  903,  902,  902,  901,  900,  899,  899,  898,  897,  896,  896,  895,  894,  893,  893,  892,  891,  890,  889,  889,  888,  887,  886,  885,  885,  884,  883,  882,  882,  881,  880,  879,  878,  878,  877,  876,  875,  874,  873,  873,  872,  871,  870,  869,  868,  868,  867,  866,  865,  864,  863,  863,  862,  861,  860,  859,  858,  857,  857,  856,  855,  854,  853,  852,  851,  851,  850,  849,  848,  847,  846,  845,  844,  843,  843,  842,  841,  840,  839,  838,  837,  836,  835,  834,  834,  833,  832,  831,  830,  829,  828,  827,  826,  825,  824,  823,  822,  822,  821,  820,  819,  818,  817,  816,  815,  814,  813,  812,  811,  810,  809,  808,  807,  806,  805,  804,  803,  802,  801,  800,  799,  798,  798,  797,  796,  795,  794,  793,  792,  791,  790,  789,  788,  787,  786,  785,  784,  783,  782,  780,  779,  778,  777,  776,  775,  774,  773,  772,  771,  770,  769,  768,  767,  766,  765,  764,  763,  762,  761,  760,  759,  758,  757,  756,  755,  753,  752,  751,  750,  749,  748,  747,  746,  745,  744,  743,  742,  741,  739,  738,  737,  736,  735,  734,  733,  732,  731,  730,  729,  727,  726,  725,  724,  723,  722,  721,  720,  719,  717,  716,  715,  714,  713,  712,  711,  709,  708,  707,  706,  705,  704,  703,  702,  700,  699,  698,  697,  696,  695,  693,  692,  691,  690,  689,  688,  687,  685,  684,  683,  682,  681,  679,  678,  677,  676,  675,  674,  672,  671,  670,  669,  668,  666,  665,  664,  663,  662,  660,  659,  658,  657,  656,  654,  653,  652,  651,  650,  648,  647,  646,  645,  644,  642,  641,  640,  639,  637,  636,  635,  634,  632,  631,  630,  629,  628,  626,  625,  624,  623,  621,  620,  619,  618,  616,  615,  614,  613,  611,  610,  609,  607,  606,  605,  604,  602,  601,  600,  599,  597,  596,  595,  593,  592,  591,  590,  588,  587,  586,  584,  583,  582,  581,  579,  578,  577,  575,  574,  573,  572,  570,  569,  568,  566,  565,  564,  562,  561,  560,  558,  557,  556,  554,  553,  552,  550,  549,  548,  547,  545,  544,  543,  541,  540,  539,  537,  536,  535,  533,  532,  530,  529,  528,  526,  525,  524,  522,  521,  520,  518,  517,  516,  514,  513,  512,  510,  509,  507,  506,  505,  503,  502,  501,  499,  498,  497,  495,  494,  492,  491,  490,  488,  487,  485,  484,  483,  481,  480,  479,  477,  476,  474,  473,  472,  470,  469,  467,  466,  465,  463,  462,  460,  459,  458,  456,  455,  453,  452,  451,  449,  448,  446,  445,  443,  442,  441,  439,  438,  436,  435,  434,  432,  431,  429,  428,  426,  425,  424,  422,  421,  419,  418,  416,  415,  414,  412,  411,  409,  408,  406,  405,  403,  402,  401,  399,  398,  396,  395,  393,  392,  390,  389,  388,  386,  385,  383,  382,  380,  379,  377,  376,  374,  373,  371,  370,  369,  367,  366,  364,  363,  361,  360,  358,  357,  355,  354,  352,  351,  349,  348,  346,  345,  343,  342,  341,  339,  338,  336,  335,  333,  332,  330,  329,  327,  326,  324,  323,  321,  320,  318,  317,  315,  314,  312,  311,  309,  308,  306,  305,  303,  302,  300,  299,  297,  296,  294,  293,  291,  290,  288,  287,  285,  284,  282,  281,  279,  278,  276,  275,  273,  272,  270,  269,  267,  266,  264,  263,  261,  259,  258,  256,  255,  253,  252,  250,  249,  247,  246,  244,  243,  241,  240,  238,  237,  235,  234,  232,  230,  229,  227,  226,  224,  223,  221,  220,  218,  217,   215,   214,   212,   211,   209,   207,   206,   204,   203,   201,   200,   198,   197,   195,   194,   192,   191,   189,   187,   186,   184,   183,   181,   180,   178,   177,   175,   174,   172,   170,   169,   167,   166,   164,   163,   161,   160,   158,   156,   155,   153,   152,   150,   149,   147,   146,   144,   142,   141,   139,   138,   136,   135,   133,   132,   130,   128,   127,   125,   124,   122,   121,   119,   118,   116,   114,   113,   111,   110,   108,   107,   105,   103,   102,   100,   99,    97,    96,    94,    93,    91,    89,    88,    86,    85,    83,    82,    80,    78,    77,    75,    74,    72,    71,    69,    67,    66,    64,    63,    61,    60,    58,    57,    55,    53,    52,    50,    49,    47,    46,    44,    42,    41,    39,    38,    36,    35,    33,    31,    30,    28,    27,    25,    24,    22,    20,    19,    17,    16,    14,    13,    11,    9,     8,     6,     5,     3,     2,
      0,    -1,   -2,   -4,   -5,   -7,   -8,   -10,  -12,  -13,  -15,  -16,  -18,  -19,  -21,  -23,  -24,  -26,  -27,  -29,  -30,  -32,  -34,  -35,  -37,  -38,  -40,  -41,  -43,  -45,  -46,  -48,  -49,  -51,  -52,  -54,  -56,  -57,  -59,  -60,  -62,  -63,  -65,  -66,  -68,  -70,  -71,  -73,  -74,  -76,  -77,  -79,  -81,  -82,  -84,  -85,  -87,  -88,  -90,  -92,  -93,  -95,  -96,  -98,  -99,  -101, -102, -104, -106, -107, -109, -110, -112, -113, -115, -117, -118, -120, -121, -123, -124, -126, -127, -129, -131, -132, -134, -135, -137, -138, -140, -141, -143, -145, -146, -148, -149, -151, -152, -154, -155, -157, -159, -160, -162, -163, -165, -166, -168, -169, -171, -173, -174, -176, -177, -179, -180, -182, -183, -185, -186, -188, -190, -191, -193, -194, -196, -197, -199, -200, -202, -203, -205, -206, -208, -210, -211, -213, -214, -216, -217, -219, -220, -222, -223, -225, -226, -228, -229, -231, -233, -234, -236, -237, -239, -240, -242, -243, -245, -246, -248, -249, -251, -252, -254, -255, -257, -258, -260, -262, -263, -265, -266, -268, -269, -271, -272, -274, -275, -277, -278, -280, -281, -283, -284, -286, -287, -289, -290, -292, -293, -295, -296, -298, -299, -301, -302, -304, -305, -307, -308, -310, -311, -313, -314, -316, -317, -319, -320, -322, -323, -325, -326, -328, -329, -331, -332, -334, -335, -337, -338, -340, -341, -342, -344, -345, -347, -348, -350, -351, -353, -354, -356, -357, -359, -360, -362, -363, -365, -366, -368, -369, -370, -372, -373, -375, -376, -378, -379, -381, -382, -384, -385, -387, -388, -389, -391, -392, -394, -395, -397, -398, -400, -401, -402, -404, -405, -407, -408, -410, -411, -413, -414, -415, -417, -418, -420, -421, -423, -424, -425, -427, -428, -430, -431, -433, -434, -435, -437, -438, -440, -441, -442, -444, -445, -447, -448, -450, -451, -452, -454, -455, -457, -458, -459, -461, -462, -464, -465, -466, -468, -469, -471, -472, -473, -475, -476, -478, -479, -480, -482, -483, -484, -486, -487, -489, -490, -491, -493, -494, -496, -497, -498, -500, -501, -502, -504, -505, -506, -508, -509, -511, -512, -513, -515, -516, -517, -519, -520, -521, -523, -524, -525, -527, -528, -529, -531, -532, -534, -535, -536, -538, -539, -540, -542, -543, -544, -546, -547, -548, -549, -551, -552, -553, -555, -556, -557, -559, -560, -561, -563, -564, -565, -567, -568, -569, -571, -572, -573, -574, -576, -577, -578, -580, -581, -582, -583, -585, -586, -587, -589, -590, -591, -592, -594, -595, -596, -598, -599, -600, -601, -603, -604, -605, -606, -608, -609, -610, -612, -613, -614, -615, -617, -618, -619, -620, -622, -623, -624, -625, -627, -628, -629, -630, -631, -633, -634, -635, -636, -638, -639, -640, -641, -643, -644, -645, -646, -647, -649, -650, -651, -652, -653, -655, -656, -657, -658, -659, -661, -662, -663, -664, -665, -667, -668, -669, -670, -671, -673, -674, -675, -676, -677, -678, -680, -681, -682, -683, -684, -686, -687, -688, -689, -690, -691, -692, -694, -695, -696, -697, -698, -699, -701, -702, -703, -704, -705, -706, -707, -708, -710, -711, -712, -713, -714, -715, -716, -718, -719, -720, -721, -722, -723, -724, -725, -726, -728, -729, -730, -731, -732, -733, -734, -735, -736, -737, -738, -740, -741, -742, -743, -744, -745, -746, -747, -748, -749, -750, -751, -752, -754, -755, -756, -757, -758, -759, -760, -761, -762, -763, -764, -765, -766, -767, -768, -769, -770, -771, -772, -773, -774, -775, -776, -777, -778, -779, -781, -782, -783, -784, -785, -786, -787, -788, -789, -790, -791, -792, -793, -794, -795, -796, -797, -797, -798, -799, -800, -801, -802, -803, -804, -805, -806, -807, -808, -809, -810, -811, -812, -813, -814, -815, -816, -817, -818, -819, -820, -821, -821, -822, -823, -824, -825, -826, -827, -828, -829, -830, -831, -832, -833, -833, -834, -835, -836, -837, -838, -839, -840, -841, -842, -842, -843, -844, -845, -846, -847, -848, -849, -850, -850, -851, -852, -853, -854, -855, -856, -856, -857, -858, -859, -860, -861, -862, -862, -863, -864, -865, -866, -867, -867, -868, -869, -870, -871, -872, -872, -873, -874, -875, -876, -877, -877, -878, -879, -880, -881, -881, -882, -883, -884, -884, -885, -886, -887, -888, -888, -889, -890, -891, -892, -892, -893, -894, -895, -895, -896, -897, -898, -898, -899, -900, -901, -901, -902, -903, -904, -904, -905, -906, -906, -907, -908, -909, -909, -910, -911, -912, -912, -913, -914, -914, -915, -916, -916, -917, -918, -919, -919, -920, -921, -921, -922, -923, -923, -924, -925, -925, -926, -927, -927, -928, -929, -929, -930, -931, -931, -932, -933, -933, -934, -935, -935, -936, -936, -937, -938, -938, -939, -940, -940, -941, -941, -942, -943, -943, -944, -944, -945, -946, -946, -947, -947, -948, -949, -949, -950, -950, -951, -952, -952, -953, -953, -954, -954, -955, -956, -956, -957, -957, -958, -958, -959, -959, -960, -960, -961, -962, -962, -963, -963, -964, -964, -965, -965, -966, -966, -967, -967, -968, -968, -969, -969, -970, -970, -971, -971, -972, -972, -973, -973, -974, -974, -975, -975, -976, -976, -977, -977, -978, -978, -978, -979, -979, -980, -980, -981, -981, -982, -982, -982, -983, -983, -984, -984, -985, -985, -985, -986, -986, -987, -987, -988, -988, -988, -989, -989, -990, -990, -990, -991, -991, -992, -992, -992, -993, -993, -993, -994, -994, -995, -995, -995, -996, -996, -996, -997, -997, -997, -998, -998, -998, -999, -999, -999, -1000, -1000, -1000, -1001, -1001, -1001, -1002, -1002, -1002, -1003, -1003, -1003, -1004, -1004, -1004, -1005, -1005, -1005, -1005, -1006, -1006, -1006, -1007, -1007, -1007, -1007, -1008, -1008, -1008, -1008, -1009, -1009, -1009, -1009, -1010, -1010, -1010, -1010, -1011, -1011, -1011, -1011, -1012, -1012, -1012, -1012, -1013, -1013, -1013, -1013, -1013, -1014, -1014, -1014, -1014, -1015, -1015, -1015, -1015, -1015, -1015, -1016, -1016, -1016, -1016, -1016, -1017, -1017, -1017, -1017, -1017, -1017, -1018, -1018, -1018, -1018, -1018, -1018, -1019, -1019, -1019, -1019, -1019, -1019, -1019, -1019, -1020, -1020, -1020, -1020, -1020, -1020, -1020, -1020, -1021, -1021, -1021, -1021, -1021, -1021, -1021, -1021, -1021, -1021, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1022, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023, -1023,
  };
  int x = dd & 0x800;
  dd = dd & 0x7ff;
  if (x) {
    return -t[dd];
  } else {
    return t[dd];
  }
}
```