#include "ultra64.h" #include "ultra64/leo.h" #include "ultra64/leoappli.h" #include "ultra64/leodrive.h" void leoC2_single_ecc(void); void leoC2_double_ecc(void); void leoC2_3_ecc(void); void leoC2_4_ecc(void); int leoAlpha_mult(int i, int k); int leoAlpha_div(int i, int k); extern u8 LEO_TempBuffer[0xE8]; const u8 ganlog[512] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1D, 0x3A, 0x74, 0xE8, 0xCD, 0x87, 0x13, 0x26, 0x4C, 0x98, 0x2D, 0x5A, 0xB4, 0x75, 0xEA, 0xC9, 0x8F, 0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0xC0, 0x9D, 0x27, 0x4E, 0x9C, 0x25, 0x4A, 0x94, 0x35, 0x6A, 0xD4, 0xB5, 0x77, 0xEE, 0xC1, 0x9F, 0x23, 0x46, 0x8C, 0x05, 0x0A, 0x14, 0x28, 0x50, 0xA0, 0x5D, 0xBA, 0x69, 0xD2, 0xB9, 0x6F, 0xDE, 0xA1, 0x5F, 0xBE, 0x61, 0xC2, 0x99, 0x2F, 0x5E, 0xBC, 0x65, 0xCA, 0x89, 0x0F, 0x1E, 0x3C, 0x78, 0xF0, 0xFD, 0xE7, 0xD3, 0xBB, 0x6B, 0xD6, 0xB1, 0x7F, 0xFE, 0xE1, 0xDF, 0xA3, 0x5B, 0xB6, 0x71, 0xE2, 0xD9, 0xAF, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0x0D, 0x1A, 0x34, 0x68, 0xD0, 0xBD, 0x67, 0xCE, 0x81, 0x1F, 0x3E, 0x7C, 0xF8, 0xED, 0xC7, 0x93, 0x3B, 0x76, 0xEC, 0xC5, 0x97, 0x33, 0x66, 0xCC, 0x85, 0x17, 0x2E, 0x5C, 0xB8, 0x6D, 0xDA, 0xA9, 0x4F, 0x9E, 0x21, 0x42, 0x84, 0x15, 0x2A, 0x54, 0xA8, 0x4D, 0x9A, 0x29, 0x52, 0xA4, 0x55, 0xAA, 0x49, 0x92, 0x39, 0x72, 0xE4, 0xD5, 0xB7, 0x73, 0xE6, 0xD1, 0xBF, 0x63, 0xC6, 0x91, 0x3F, 0x7E, 0xFC, 0xE5, 0xD7, 0xB3, 0x7B, 0xF6, 0xF1, 0xFF, 0xE3, 0xDB, 0xAB, 0x4B, 0x96, 0x31, 0x62, 0xC4, 0x95, 0x37, 0x6E, 0xDC, 0xA5, 0x57, 0xAE, 0x41, 0x82, 0x19, 0x32, 0x64, 0xC8, 0x8D, 0x07, 0x0E, 0x1C, 0x38, 0x70, 0xE0, 0xDD, 0xA7, 0x53, 0xA6, 0x51, 0xA2, 0x59, 0xB2, 0x79, 0xF2, 0xF9, 0xEF, 0xC3, 0x9B, 0x2B, 0x56, 0xAC, 0x45, 0x8A, 0x09, 0x12, 0x24, 0x48, 0x90, 0x3D, 0x7A, 0xF4, 0xF5, 0xF7, 0xF3, 0xFB, 0xEB, 0xCB, 0x8B, 0x0B, 0x16, 0x2C, 0x58, 0xB0, 0x7D, 0xFA, 0xE9, 0xCF, 0x83, 0x1B, 0x36, 0x6C, 0xD8, 0xAD, 0x47, 0x8E, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1D, 0x3A, 0x74, 0xE8, 0xCD, 0x87, 0x13, 0x26, 0x4C, 0x98, 0x2D, 0x5A, 0xB4, 0x75, 0xEA, 0xC9, 0x8F, 0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0xC0, 0x9D, 0x27, 0x4E, 0x9C, 0x25, 0x4A, 0x94, 0x35, 0x6A, 0xD4, 0xB5, 0x77, 0xEE, 0xC1, 0x9F, 0x23, 0x46, 0x8C, 0x05, 0x0A, 0x14, 0x28, 0x50, 0xA0, 0x5D, 0xBA, 0x69, 0xD2, 0xB9, 0x6F, 0xDE, 0xA1, 0x5F, 0xBE, 0x61, 0xC2, 0x99, 0x2F, 0x5E, 0xBC, 0x65, 0xCA, 0x89, 0x0F, 0x1E, 0x3C, 0x78, 0xF0, 0xFD, 0xE7, 0xD3, 0xBB, 0x6B, 0xD6, 0xB1, 0x7F, 0xFE, 0xE1, 0xDF, 0xA3, 0x5B, 0xB6, 0x71, 0xE2, 0xD9, 0xAF, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0x0D, 0x1A, 0x34, 0x68, 0xD0, 0xBD, 0x67, 0xCE, 0x81, 0x1F, 0x3E, 0x7C, 0xF8, 0xED, 0xC7, 0x93, 0x3B, 0x76, 0xEC, 0xC5, 0x97, 0x33, 0x66, 0xCC, 0x85, 0x17, 0x2E, 0x5C, 0xB8, 0x6D, 0xDA, 0xA9, 0x4F, 0x9E, 0x21, 0x42, 0x84, 0x15, 0x2A, 0x54, 0xA8, 0x4D, 0x9A, 0x29, 0x52, 0xA4, 0x55, 0xAA, 0x49, 0x92, 0x39, 0x72, 0xE4, 0xD5, 0xB7, 0x73, 0xE6, 0xD1, 0xBF, 0x63, 0xC6, 0x91, 0x3F, 0x7E, 0xFC, 0xE5, 0xD7, 0xB3, 0x7B, 0xF6, 0xF1, 0xFF, 0xE3, 0xDB, 0xAB, 0x4B, 0x96, 0x31, 0x62, 0xC4, 0x95, 0x37, 0x6E, 0xDC, 0xA5, 0x57, 0xAE, 0x41, 0x82, 0x19, 0x32, 0x64, 0xC8, 0x8D, 0x07, 0x0E, 0x1C, 0x38, 0x70, 0xE0, 0xDD, 0xA7, 0x53, 0xA6, 0x51, 0xA2, 0x59, 0xB2, 0x79, 0xF2, 0xF9, 0xEF, 0xC3, 0x9B, 0x2B, 0x56, 0xAC, 0x45, 0x8A, 0x09, 0x12, 0x24, 0x48, 0x90, 0x3D, 0x7A, 0xF4, 0xF5, 0xF7, 0xF3, 0xFB, 0xEB, 0xCB, 0x8B, 0x0B, 0x16, 0x2C, 0x58, 0xB0, 0x7D, 0xFA, 0xE9, 0xCF, 0x83, 0x1B, 0x36, 0x6C, 0xD8, 0xAD, 0x47, 0x8E, 0x01, 0x02 }; const u8 glog[512] = { 0x00, 0x00, 0x01, 0x19, 0x02, 0x32, 0x1A, 0xC6, 0x03, 0xDF, 0x33, 0xEE, 0x1B, 0x68, 0xC7, 0x4B, 0x04, 0x64, 0xE0, 0x0E, 0x34, 0x8D, 0xEF, 0x81, 0x1C, 0xC1, 0x69, 0xF8, 0xC8, 0x08, 0x4C, 0x71, 0x05, 0x8A, 0x65, 0x2F, 0xE1, 0x24, 0x0F, 0x21, 0x35, 0x93, 0x8E, 0xDA, 0xF0, 0x12, 0x82, 0x45, 0x1D, 0xB5, 0xC2, 0x7D, 0x6A, 0x27, 0xF9, 0xB9, 0xC9, 0x9A, 0x09, 0x78, 0x4D, 0xE4, 0x72, 0xA6, 0x06, 0xBF, 0x8B, 0x62, 0x66, 0xDD, 0x30, 0xFD, 0xE2, 0x98, 0x25, 0xB3, 0x10, 0x91, 0x22, 0x88, 0x36, 0xD0, 0x94, 0xCE, 0x8F, 0x96, 0xDB, 0xBD, 0xF1, 0xD2, 0x13, 0x5C, 0x83, 0x38, 0x46, 0x40, 0x1E, 0x42, 0xB6, 0xA3, 0xC3, 0x48, 0x7E, 0x6E, 0x6B, 0x3A, 0x28, 0x54, 0xFA, 0x85, 0xBA, 0x3D, 0xCA, 0x5E, 0x9B, 0x9F, 0x0A, 0x15, 0x79, 0x2B, 0x4E, 0xD4, 0xE5, 0xAC, 0x73, 0xF3, 0xA7, 0x57, 0x07, 0x70, 0xC0, 0xF7, 0x8C, 0x80, 0x63, 0x0D, 0x67, 0x4A, 0xDE, 0xED, 0x31, 0xC5, 0xFE, 0x18, 0xE3, 0xA5, 0x99, 0x77, 0x26, 0xB8, 0xB4, 0x7C, 0x11, 0x44, 0x92, 0xD9, 0x23, 0x20, 0x89, 0x2E, 0x37, 0x3F, 0xD1, 0x5B, 0x95, 0xBC, 0xCF, 0xCD, 0x90, 0x87, 0x97, 0xB2, 0xDC, 0xFC, 0xBE, 0x61, 0xF2, 0x56, 0xD3, 0xAB, 0x14, 0x2A, 0x5D, 0x9E, 0x84, 0x3C, 0x39, 0x53, 0x47, 0x6D, 0x41, 0xA2, 0x1F, 0x2D, 0x43, 0xD8, 0xB7, 0x7B, 0xA4, 0x76, 0xC4, 0x17, 0x49, 0xEC, 0x7F, 0x0C, 0x6F, 0xF6, 0x6C, 0xA1, 0x3B, 0x52, 0x29, 0x9D, 0x55, 0xAA, 0xFB, 0x60, 0x86, 0xB1, 0xBB, 0xCC, 0x3E, 0x5A, 0xCB, 0x59, 0x5F, 0xB0, 0x9C, 0xA9, 0xA0, 0x51, 0x0B, 0xF5, 0x16, 0xEB, 0x7A, 0x75, 0x2C, 0xD7, 0x4F, 0xAE, 0xD5, 0xE9, 0xE6, 0xE7, 0xAD, 0xE8, 0x74, 0xD6, 0xF4, 0xEA, 0xA8, 0x50, 0x58, 0xAF, 0xFF, 0x01, 0x19, 0x02, 0x32, 0x1A, 0xC6, 0x03, 0xDF, 0x33, 0xEE, 0x1B, 0x68, 0xC7, 0x4B, 0x04, 0x64, 0xE0, 0x0E, 0x34, 0x8D, 0xEF, 0x81, 0x1C, 0xC1, 0x69, 0xF8, 0xC8, 0x08, 0x4C, 0x71, 0x05, 0x8A, 0x65, 0x2F, 0xE1, 0x24, 0x0F, 0x21, 0x35, 0x93, 0x8E, 0xDA, 0xF0, 0x12, 0x82, 0x45, 0x1D, 0xB5, 0xC2, 0x7D, 0x6A, 0x27, 0xF9, 0xB9, 0xC9, 0x9A, 0x09, 0x78, 0x4D, 0xE4, 0x72, 0xA6, 0x06, 0xBF, 0x8B, 0x62, 0x66, 0xDD, 0x30, 0xFD, 0xE2, 0x98, 0x25, 0xB3, 0x10, 0x91, 0x22, 0x88, 0x36, 0xD0, 0x94, 0xCE, 0x8F, 0x96, 0xDB, 0xBD, 0xF1, 0xD2, 0x13, 0x5C, 0x83, 0x38, 0x46, 0x40, 0x1E, 0x42, 0xB6, 0xA3, 0xC3, 0x48, 0x7E, 0x6E, 0x6B, 0x3A, 0x28, 0x54, 0xFA, 0x85, 0xBA, 0x3D, 0xCA, 0x5E, 0x9B, 0x9F, 0x0A, 0x15, 0x79, 0x2B, 0x4E, 0xD4, 0xE5, 0xAC, 0x73, 0xF3, 0xA7, 0x57, 0x07, 0x70, 0xC0, 0xF7, 0x8C, 0x80, 0x63, 0x0D, 0x67, 0x4A, 0xDE, 0xED, 0x31, 0xC5, 0xFE, 0x18, 0xE3, 0xA5, 0x99, 0x77, 0x26, 0xB8, 0xB4, 0x7C, 0x11, 0x44, 0x92, 0xD9, 0x23, 0x20, 0x89, 0x2E, 0x37, 0x3F, 0xD1, 0x5B, 0x95, 0xBC, 0xCF, 0xCD, 0x90, 0x87, 0x97, 0xB2, 0xDC, 0xFC, 0xBE, 0x61, 0xF2, 0x56, 0xD3, 0xAB, 0x14, 0x2A, 0x5D, 0x9E, 0x84, 0x3C, 0x39, 0x53, 0x47, 0x6D, 0x41, 0xA2, 0x1F, 0x2D, 0x43, 0xD8, 0xB7, 0x7B, 0xA4, 0x76, 0xC4, 0x17, 0x49, 0xEC, 0x7F, 0x0C, 0x6F, 0xF6, 0x6C, 0xA1, 0x3B, 0x52, 0x29, 0x9D, 0x55, 0xAA, 0xFB, 0x60, 0x86, 0xB1, 0xBB, 0xCC, 0x3E, 0x5A, 0xCB, 0x59, 0x5F, 0xB0, 0x9C, 0xA9, 0xA0, 0x51, 0x0B, 0xF5, 0x16, 0xEB, 0x7A, 0x75, 0x2C, 0xD7, 0x4F, 0xAE, 0xD5, 0xE9, 0xE6, 0xE7, 0xAD, 0xE8, 0x74, 0xD6, 0xF4, 0xEA, 0xA8, 0x50, 0x58, 0xAF, 0xFF }; block_param_form LEOc2_param; int leoC2_Correction(void) { switch (LEOc2_param.err_num) { case 0: break; case 1: leoC2_single_ecc(); break; case 2: leoC2_double_ecc(); break; case 3: leoC2_3_ecc(); break; case 4: leoC2_4_ecc(); break; default: return 0xFFFF; } return 0; } // static void leoC2_single_ecc(void) { u8* pointer; unsigned int byte; u8* p_s; if (LEOc2_param.err_pos[0] < 0x55) { byte = LEOc2_param.bytes; pointer = &LEOc2_param.pntr[(LEOc2_param.err_pos[0] + 1) * byte]; p_s = LEOc2_param.c2buff_e; do { *(--pointer) ^= *(p_s -= 4); } while (--byte != 0); } } // static void leoC2_double_ecc(void) { unsigned int s0; unsigned int error_k; u8* pointer1; u8* pointer2; unsigned int k; unsigned int m; unsigned int a; unsigned int d; unsigned int byte; u8* p_s; k = 0x58 - LEOc2_param.err_pos[0]; m = 0x58 - LEOc2_param.err_pos[1]; d = ganlog[k] ^ ganlog[m]; d = glog[leoAlpha_div(1, d)]; byte = LEOc2_param.bytes; if (LEOc2_param.err_pos[1] < 0x55) { goto c2_2_2; } pointer2 = &LEO_TempBuffer[sizeof(LEO_TempBuffer)]; if (LEOc2_param.err_pos[0] < 0x55) { goto c2_2_1; } return; c2_2_2: pointer2 = &LEOc2_param.pntr[(LEOc2_param.err_pos[1] + 1) * byte]; c2_2_1: pointer1 = &LEOc2_param.pntr[(LEOc2_param.err_pos[0] + 1) * byte]; p_s = LEOc2_param.c2buff_e; do { p_s -= 4; s0 = p_s[0]; if (s0 != 0) { a = ganlog[m + glog[s0]] ^ p_s[1]; } else { a = p_s[1]; } pointer1--; pointer2--; if (a != 0) { error_k = ganlog[glog[a] + d]; *pointer1 ^= error_k; *pointer2 ^= error_k ^ s0; } else { *pointer2 ^= s0; } } while (--byte != 0); } // static void leoC2_3_ecc(void) { unsigned int s0; unsigned int error_i; unsigned int error_j; unsigned int error_k; u8* pointer1; u8* pointer2; u8* pointer3; unsigned int byte; unsigned int ii; unsigned int jj; unsigned int kk; unsigned int c; unsigned int f; unsigned int o; unsigned int b; unsigned int d; unsigned int h; unsigned int a; unsigned int e; unsigned int g; unsigned int p; u8* p_s; ii = 0x58 - LEOc2_param.err_pos[0]; jj = 0x58 - LEOc2_param.err_pos[1]; kk = 0x58 - LEOc2_param.err_pos[2]; ii = ganlog[ii]; jj = ganlog[jj]; kk = ganlog[kk]; c = leoAlpha_mult(kk, kk); f = leoAlpha_mult(jj, jj); o = leoAlpha_mult(ii, ii); b = c ^ f; d = c ^ o; h = f ^ o; a = leoAlpha_mult(jj, c) ^ leoAlpha_mult(kk, f); e = leoAlpha_mult(kk, o) ^ leoAlpha_mult(ii, c); g = leoAlpha_mult(jj, o) ^ leoAlpha_mult(ii, f); c = jj ^ kk; f = kk ^ ii; o = ii ^ jj; p = a ^ e ^ g; p = leoAlpha_div(1, p); a = glog[a]; b = glog[b]; c = glog[c]; d = glog[d]; e = glog[e]; f = glog[f]; g = glog[g]; h = glog[h]; o = glog[o]; p = glog[p]; byte = LEOc2_param.bytes; if (LEOc2_param.err_pos[2] < 0x55) { goto c2_3_3; } pointer3 = &LEO_TempBuffer[sizeof(LEO_TempBuffer)]; if (LEOc2_param.err_pos[1] < 0x55) { goto c2_3_2; } pointer2 = &LEO_TempBuffer[sizeof(LEO_TempBuffer)]; if (LEOc2_param.err_pos[0] < 0x55) { goto c2_3_1; } return; c2_3_3: pointer3 = &LEOc2_param.pntr[(LEOc2_param.err_pos[2] + 1) * byte]; c2_3_2: pointer2 = &LEOc2_param.pntr[(LEOc2_param.err_pos[1] + 1) * byte]; c2_3_1: pointer1 = &LEOc2_param.pntr[(LEOc2_param.err_pos[0] + 1) * byte]; p_s = LEOc2_param.c2buff_e; do { p_s -= 4; s0 = p_s[0]; if (s0) { s0 = glog[s0]; error_i = ganlog[s0 + a]; error_j = ganlog[s0 + e]; error_k = ganlog[s0 + g]; } else { error_i = error_j = error_k = 0; } s0 = p_s[1]; if (s0) { s0 = glog[s0]; error_i ^= ganlog[s0 + b]; error_j ^= ganlog[s0 + d]; error_k ^= ganlog[s0 + h]; } s0 = p_s[2]; if (s0) { s0 = glog[s0]; error_i ^= ganlog[s0 + c]; error_j ^= ganlog[s0 + f]; error_k ^= ganlog[s0 + o]; } pointer1--; pointer2--; pointer3--; if (error_i) { *pointer1 ^= ganlog[glog[error_i] + p]; } if (error_j) { *pointer2 ^= ganlog[glog[error_j] + p]; } if (error_k) { *pointer3 ^= ganlog[glog[error_k] + p]; } } while (--byte != 0); } // static void leoC2_4_ecc(void) { unsigned int s0; unsigned int R0; unsigned int R1; unsigned int R2; unsigned int R3; u8* pointer1; u8* pointer2; u8* pointer3; u8* pointer4; unsigned int aa; unsigned int bb; unsigned int dd; unsigned int ee; unsigned int gg; unsigned int hh; unsigned int pp; unsigned int qq; unsigned int ll; unsigned int ii; unsigned int jj; unsigned int kk; unsigned int byte; unsigned int s; unsigned int a; unsigned int e; unsigned int g; unsigned int p; unsigned int c; unsigned int f; unsigned int o; unsigned int r; unsigned int t; unsigned int u; unsigned int v; unsigned int b; unsigned int d; unsigned int h; unsigned int q; u8* p_s; ii = 0x58 - LEOc2_param.err_pos[0]; jj = 0x58 - LEOc2_param.err_pos[1]; kk = 0x58 - LEOc2_param.err_pos[2]; ll = 0x58 - LEOc2_param.err_pos[3]; ii = ganlog[ii]; jj = ganlog[jj]; kk = ganlog[kk]; ll = ganlog[ll]; s = ganlog[0]; aa = leoAlpha_div(s, ii); bb = leoAlpha_div(s, jj); ee = leoAlpha_div(s, kk); dd = leoAlpha_div(s, ll); a = leoAlpha_mult(bb, ee); e = leoAlpha_mult(ee, dd); g = leoAlpha_mult(dd, bb); p = leoAlpha_mult(dd, aa); c = leoAlpha_mult(aa, ee); f = leoAlpha_mult(aa, bb); b = a ^ e ^ g; d = e ^ p ^ c; h = p ^ f ^ g; q = f ^ a ^ c; a = bb ^ ee ^ dd; e = ee ^ dd ^ aa; g = dd ^ aa ^ bb; p = aa ^ bb ^ ee; c = leoAlpha_mult(leoAlpha_mult(bb, ee), dd); f = leoAlpha_mult(leoAlpha_mult(ee, dd), aa); o = leoAlpha_mult(leoAlpha_mult(dd, aa), bb); r = leoAlpha_mult(leoAlpha_mult(aa, bb), ee); s = leoAlpha_mult(leoAlpha_mult(leoAlpha_div(ii, jj) ^ 1, leoAlpha_div(ii, kk) ^ 1), leoAlpha_div(ii, ll) ^ 1); s = leoAlpha_div(1, s); t = leoAlpha_mult(leoAlpha_mult(leoAlpha_div(jj, ii) ^ 1, leoAlpha_div(jj, kk) ^ 1), leoAlpha_div(jj, ll) ^ 1); t = leoAlpha_div(1, t); u = leoAlpha_mult(leoAlpha_mult(leoAlpha_div(kk, ii) ^ 1, leoAlpha_div(kk, jj) ^ 1), leoAlpha_div(kk, ll) ^ 1); u = leoAlpha_div(1, u); v = leoAlpha_mult(leoAlpha_mult(leoAlpha_div(ll, ii) ^ 1, leoAlpha_div(ll, jj) ^ 1), leoAlpha_div(ll, kk) ^ 1); v = leoAlpha_div(1, v); aa = glog[leoAlpha_mult(a, s)]; bb = glog[leoAlpha_mult(b, s)]; c = leoAlpha_mult(c, s); ee = glog[leoAlpha_mult(e, t)]; dd = glog[leoAlpha_mult(d, t)]; f = leoAlpha_mult(f, t); gg = glog[leoAlpha_mult(g, u)]; hh = glog[leoAlpha_mult(h, u)]; o = leoAlpha_mult(o, u); pp = glog[leoAlpha_mult(p, v)]; qq = glog[leoAlpha_mult(q, v)]; r = leoAlpha_mult(r, v); s = glog[s]; c = glog[c]; t = glog[t]; f = glog[f]; u = glog[u]; o = glog[o]; v = glog[v]; r = glog[r]; byte = LEOc2_param.bytes; if (LEOc2_param.err_pos[3] < 0x55) { goto c2_4_4; } pointer4 = &LEO_TempBuffer[sizeof(LEO_TempBuffer)]; if (LEOc2_param.err_pos[2] < 0x55) { goto c2_4_3; } pointer3 = &LEO_TempBuffer[sizeof(LEO_TempBuffer)]; if (LEOc2_param.err_pos[1] < 0x55) { goto c2_4_2; } pointer2 = &LEO_TempBuffer[sizeof(LEO_TempBuffer)]; if (LEOc2_param.err_pos[0] < 0x55) { goto c2_4_1; } return; c2_4_4: pointer4 = &LEOc2_param.pntr[(LEOc2_param.err_pos[3] + 1) * byte]; c2_4_3: pointer3 = &LEOc2_param.pntr[(LEOc2_param.err_pos[2] + 1) * byte]; c2_4_2: pointer2 = &LEOc2_param.pntr[(LEOc2_param.err_pos[1] + 1) * byte]; c2_4_1: pointer1 = &LEOc2_param.pntr[(LEOc2_param.err_pos[0] + 1) * byte]; p_s = LEOc2_param.c2buff_e; do { p_s -= 4; s0 = p_s[0]; if (!s0) { R0 = R1 = R2 = R3 = 0; } else { s0 = glog[s0]; R0 = ganlog[s0 + s]; R1 = ganlog[s0 + t]; R2 = ganlog[s0 + u]; R3 = ganlog[s0 + v]; } s0 = p_s[1]; if (s0) { s0 = glog[s0]; R0 ^= (!a) ? 0 : ganlog[s0 + aa]; R1 ^= (!e) ? 0 : ganlog[s0 + ee]; R2 ^= (!g) ? 0 : ganlog[s0 + gg]; R3 ^= (!p) ? 0 : ganlog[s0 + pp]; } s0 = p_s[2]; if (s0) { s0 = glog[s0]; R0 ^= (!b) ? 0 : ganlog[s0 + bb]; R1 ^= (!d) ? 0 : ganlog[s0 + dd]; R2 ^= (!h) ? 0 : ganlog[s0 + hh]; R3 ^= (!q) ? 0 : ganlog[s0 + qq]; } s0 = p_s[3]; if (s0) { s0 = glog[s0]; R0 ^= ganlog[s0 + c]; R1 ^= ganlog[s0 + f]; R2 ^= ganlog[s0 + o]; R3 ^= ganlog[s0 + r]; } pointer1--; pointer2--; pointer3--; pointer4--; if (R0) { *pointer1 ^= R0; } if (R1) { *pointer2 ^= R1; } if (R2) { *pointer3 ^= R2; } if (R3) { *pointer4 ^= R3; } } while (--byte != 0); } // static int leoAlpha_mult(int i, int k) { if (i == 0 || k == 0) { return 0; } return ganlog[glog[i] + glog[k]]; } // static int leoAlpha_div(int i, int k) { if (i == 0 || k == 0) { return 0; } return ganlog[0xFF + (glog[i] - glog[k])]; }