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view lwasm/cycle.c @ 482:9c24336fa76c
Correct cycle counts for W relative indexing modes
Actually handle the 6309 specific W relative indexing modes (,W; n,W; ,W++;
,--W) in the cycle count calculation code. These work differently than the
regular indexing modes so it's necessary to handle their bit patterns
specially. (The bits that would normally select the base register are used
instead to select the operation on W.)
author | William Astle <lost@l-w.ca> |
---|---|
date | Thu, 24 Jan 2019 18:24:03 -0700 |
parents | b9917c4dc6cf |
children | e545196bf14f |
line wrap: on
line source
/* cycle.c Copyright (c) 2015 Erik Gavriluk Dual-licensed BSD 3-CLAUSE and GPL as per below. Thanks to John Kowalksi for cycle count verification. This file is part of LWTOOLS. LWTOOLS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "lwasm.h" typedef struct { int opc; int cycles_6809; int cycles_6309; cycle_flags flags; } cycletable_t; static cycletable_t cycletable[] = { { 0x3a, 3, 1, 0 }, // ABX { 0x89, 2, 2, 0 }, // ADCA { 0x99, 4, 3, 0 }, { 0xa9, 4, 4, CYCLE_ADJ }, { 0xb9, 5, 4, 0 }, { 0xc9, 2, 2, 0 }, // ADCB { 0xd9, 4, 3, 0 }, { 0xe9, 4, 4, CYCLE_ADJ }, { 0xf9, 5, 4, 0 }, { 0x1089, 5, 4, 0 }, // ADCD { 0x1099, 7, 5, 0 }, { 0x10a9, 7, 6, CYCLE_ADJ }, { 0x10b9, 8, 6, 0 }, { 0x8b, 2, 2, 0 }, // ADDA { 0x9b, 4, 3, 0 }, { 0xab, 4, 4, CYCLE_ADJ }, { 0xbb, 5, 4, 0 }, { 0xcb, 2, 2, 0 }, // ADDB { 0xdb, 4, 3, 0 }, { 0xeb, 4, 4, CYCLE_ADJ }, { 0xfb, 5, 4, 0 }, { 0xc3, 4, 3, 0 }, // ADDD { 0xd3, 6, 4, 0 }, { 0xe3, 6, 5, CYCLE_ADJ }, { 0xf3, 7, 5, 0 }, { 0x118b, 3, 3, 0 }, // ADDE { 0x119b, 5, 4, 0 }, { 0x11ab, 5, 5, CYCLE_ADJ }, { 0x11bb, 6, 5, 0 }, { 0x11cb, 3, 3, 0 }, // ADDF { 0x11db, 5, 4, 0 }, { 0x11eb, 5, 5, CYCLE_ADJ }, { 0x11fb, 6, 5, 0 }, { 0x1031, 4, 4, 0 }, // ADCR { 0x1030, 4, 4, 0 }, // ADDR { 0x1034, 4, 4, 0 }, // ANDR { 0x1037, 4, 4, 0 }, // CMPR { 0x1036, 4, 4, 0 }, // EORR { 0x1035, 4, 4, 0 }, // ORR { 0x1033, 4, 4, 0 }, // SBCR { 0x1032, 4, 4, 0 }, // SUBR { 0x108b, 5, 4, 0 }, // ADDW { 0x109b, 7, 5, 0 }, { 0x10ab, 7, 6, CYCLE_ADJ }, { 0x10bb, 8, 6, 0 }, { 0x02, 6, 6, 0 }, // AIM { 0x62, 7, 7, CYCLE_ADJ }, { 0x72, 7, 7, 0 }, { 0x84, 2, 2, 0 }, // ANDA { 0x94, 4, 3, 0 }, { 0xa4, 4, 4, CYCLE_ADJ }, { 0xb4, 5, 4, 0 }, { 0xc4, 2, 2, 0 }, // ANDB { 0xd4, 4, 3, 0 }, { 0xe4, 4, 4, CYCLE_ADJ }, { 0xf4, 5, 4, 0 }, { 0x1c, 3, 2, 0 }, // ANDCC { 0x1084, 5, 4, 0 }, // ANDD { 0x1094, 7, 5, 0 }, { 0x10a4, 7, 6, CYCLE_ADJ }, { 0x10b4, 8, 6, 0 }, { 0x48, 2, 1, 0 }, // ASL { 0x58, 2, 1, 0 }, { 0x1048, 3, 2, 0 }, { 0x08, 6, 5, 0 }, { 0x68, 6, 6, CYCLE_ADJ }, { 0x78, 7, 6, 0 }, { 0x47, 2, 1, 0 }, // ASR { 0x57, 2, 1, 0 }, { 0x1047, 3, 2, 0 }, { 0x07, 6, 5, 0 }, { 0x67, 6, 6, CYCLE_ADJ }, { 0x77, 7, 6, 0 }, { 0x1130, 7, 6, 0 }, // BAND { 0x1131, 7, 6, 0 }, // BIAND { 0x1132, 7, 6, 0 }, // BOR { 0x1133, 7, 6, 0 }, // BIOR { 0x1134, 7, 6, 0 }, // BEOR { 0x1135, 7, 6, 0 }, // BIEOR { 0x85, 2, 2, 0 }, // BITA { 0x95, 4, 3, 0 }, { 0xa5, 4, 4, CYCLE_ADJ }, { 0xb5, 5, 4, 0 }, { 0xc5, 2, 2, 0 }, // BITB { 0xd5, 4, 3, 0 }, { 0xe5, 4, 4, CYCLE_ADJ }, { 0xf5, 5, 4, 0 }, { 0x1085, 5, 4, 0 }, // BITD { 0x1095, 7, 5, 0 }, { 0x10a5, 7, 6, CYCLE_ADJ }, { 0x10b5, 8, 6, 0 }, { 0x113c, 4, 4, 0 }, // BITMD { 0x20, 3, 3, 0 }, // BRA { 0x21, 3, 3, 0 }, { 0x22, 3, 3, 0 }, { 0x23, 3, 3, 0 }, { 0x24, 3, 3, 0 }, { 0x25, 3, 3, 0 }, { 0x26, 3, 3, 0 }, { 0x27, 3, 3, 0 }, { 0x28, 3, 3, 0 }, { 0x29, 3, 3, 0 }, { 0x2a, 3, 3, 0 }, { 0x2b, 3, 3, 0 }, { 0x2c, 3, 3, 0 }, { 0x2d, 3, 3, 0 }, { 0x2e, 3, 3, 0 }, { 0x2f, 3, 3, 0 }, { 0x8d, 7, 6, 0 }, // BSR { 0x4f, 2, 1, 0 }, // CLR { 0x5f, 2, 1, 0 }, { 0x104f, 3, 2, 0 }, { 0x114f, 3, 2, 0 }, { 0x115f, 3, 2, 0 }, { 0x105f, 3, 2, 0 }, { 0x0f, 6, 5, 0 }, { 0x6f, 6, 6, CYCLE_ADJ }, { 0x7f, 7, 6, 0 }, { 0x81, 2, 2, 0 }, // CMPA { 0x91, 4, 3, 0 }, { 0xa1, 4, 4, CYCLE_ADJ }, { 0xb1, 5, 4, 0 }, { 0xc1, 2, 2, 0 }, // CMPB { 0xd1, 4, 3, 0 }, { 0xe1, 4, 4, CYCLE_ADJ }, { 0xf1, 5, 4, 0 }, { 0x1083, 5, 4, 0 }, // CMPD { 0x1093, 7, 5, 0 }, { 0x10a3, 7, 6, CYCLE_ADJ }, { 0x10b3, 8, 6, 0 }, { 0x1181, 3, 3, 0 }, // CMPE { 0x1191, 5, 4, 0 }, { 0x11a1, 5, 5, CYCLE_ADJ }, { 0x11b1, 6, 5, 0 }, { 0x11c1, 3, 3, 0 }, // CMPF { 0x11d1, 5, 4, 0 }, { 0x11e1, 5, 5, CYCLE_ADJ }, { 0x11f1, 6, 5, 0 }, { 0x118c, 5, 4, 0 }, // CMPS { 0x119c, 7, 5, 0 }, { 0x11ac, 7, 6, CYCLE_ADJ }, { 0x11bc, 8, 6, 0 }, { 0x1183, 5, 4, 0 }, // CMPU { 0x1193, 7, 5, 0 }, { 0x11a3, 7, 6, CYCLE_ADJ }, { 0x11b3, 8, 6, 0 }, { 0x1081, 5, 4, 0 }, // CMPW { 0x1091, 7, 5, 0 }, { 0x10a1, 7, 6, CYCLE_ADJ }, { 0x10b1, 8, 6, 0 }, { 0x8c, 4, 3, 0 }, // CMPX { 0x9c, 6, 4, 0 }, { 0xac, 6, 5, CYCLE_ADJ }, { 0xbc, 7, 5, 0 }, { 0x108c, 5, 4, 0 }, // CMPY { 0x109c, 7, 5, 0 }, { 0x10ac, 7, 6, CYCLE_ADJ }, { 0x10bc, 8, 6, 0 }, { 0x43, 2, 1, 0 }, // COMA { 0x53, 2, 1, 0 }, // COMB { 0x1043, 3, 2, 0 }, // COMD { 0x1143, 3, 2, 0 }, // COME { 0x1153, 3, 2, 0 }, // COMF { 0x1053, 3, 2, 0 }, // COMW { 0x03, 6, 5, 0 }, // COM { 0x63, 6, 6, CYCLE_ADJ }, { 0x73, 7, 6, 0 }, { 0x3c, 22, 20, CYCLE_ESTIMATED }, // CWAI { 0x19, 2, 1, 0 }, // DAA { 0x4a, 2, 1, 0 }, // DECA { 0x5a, 2, 1, 0 }, // DECB { 0x104a, 3, 2, 0 }, // DECD { 0x114a, 3, 2, 0 }, // DECE { 0x115a, 3, 2, 0 }, // DECF { 0x105a, 3, 2, 0 }, // DECW { 0x0a, 6, 5, 0 }, // DEC { 0x6a, 6, 6, CYCLE_ADJ }, { 0x7a, 7, 6, 0 }, { 0x118d, 25, 25, 0 }, // DIVD { 0x119d, 27, 26, 0 }, { 0x11ad, 27, 27, CYCLE_ADJ }, { 0x11bd, 28, 27, 0 }, { 0x118e, 34, 34, 0 }, // DIVQ { 0x119e, 36, 35, 0 }, { 0x11ae, 36, 36, 0 }, { 0x11be, 37, 36, 0 }, { 0x05, 6, 6, 0 }, // EIM { 0x65, 7, 7, CYCLE_ADJ }, { 0x75, 7, 7, 0 }, { 0x88, 2, 2, 0 }, // EORA { 0x98, 4, 3, 0 }, { 0xa8, 4, 4, CYCLE_ADJ }, { 0xb8, 5, 4, 0 }, { 0xc8, 2, 2, 0 }, // EORB { 0xd8, 4, 3, 0 }, { 0xe8, 4, 4, CYCLE_ADJ }, { 0xf8, 5, 4, 0 }, { 0x1088, 5, 4, 0 }, // EORD { 0x1098, 7, 5, 0 }, { 0x10a8, 7, 6, CYCLE_ADJ }, { 0x10b8, 8, 6, 0 }, { 0x1e, 8, 5, 0 }, // EXG { 0x4c, 2, 1, 0 }, // INCA { 0x5c, 2, 1, 0 }, // INCB { 0x104c, 3, 2, 0 }, // INCD { 0x114c, 3, 2, 0 }, // INCE { 0x115c, 3, 2, 0 }, // INCF { 0x105c, 3, 2, 0 }, // INCW { 0x0c, 6, 5, 0 }, // INC { 0x6c, 6, 6, CYCLE_ADJ }, { 0x7c, 7, 6, 0 }, { 0x0e, 3, 2, 0 }, // JMP { 0x6e, 3, 3, CYCLE_ADJ }, { 0x7e, 4, 3, 0 }, { 0x9d, 7, 6, 0 }, // JSR { 0xad, 7, 6, CYCLE_ADJ }, { 0xbd, 8, 7, 0 }, { 0x16, 5, 4, 0 }, // LBRA { 0x17, 9, 7, 0 }, // LBSR { 0x1021, 5, 5, 0 }, // LBRN { 0x1022, 5, 5, 0 }, // remaining long branches are estimated on 6809 only: { 0x1023, 5, 5, 0 }, // { 0x1024, 5, 5, 0 }, // 6809: 5 cycles, +1 cycle if the branch is taken { 0x1025, 5, 5, 0 }, // 6309 native: always 5 cycles { 0x1026, 5, 5, 0 }, // { 0x1027, 5, 5, 0 }, // this is handled as a special case elsewhere { 0x1028, 5, 5, 0 }, { 0x1029, 5, 5, 0 }, { 0x102a, 5, 5, 0 }, { 0x102b, 5, 5, 0 }, { 0x102c, 5, 5, 0 }, { 0x102d, 5, 5, 0 }, { 0x102e, 5, 5, 0 }, { 0x102f, 5, 5, 0 }, { 0x86, 2, 2, 0 }, // LDA { 0x96, 4, 3, 0 }, { 0xa6, 4, 4, CYCLE_ADJ }, { 0xb6, 5, 4, 0 }, { 0xc6, 2, 2, 0 }, // LDB { 0xd6, 4, 3 }, { 0xe6, 4, 4, CYCLE_ADJ }, { 0xf6, 5, 4, 0 }, { 0x1136, 7, 6, 0 }, // LDBT { 0xcc, 3, 3, 0 }, // LDD { 0xdc, 5, 4, 0 }, { 0xec, 5, 5, CYCLE_ADJ }, { 0xfc, 6, 5, 0 }, { 0x1186, 3, 3, 0 }, // LDE { 0x1196, 5, 4, 0 }, { 0x11a6, 5, 5, CYCLE_ADJ }, { 0x11b6, 6, 5, 0 }, { 0x11c6, 3, 3, 0 }, // LDF { 0x11d6, 5, 4, 0 }, { 0x11e6, 5, 5, CYCLE_ADJ }, { 0x11f6, 6, 5, 0 }, { 0xcd, 5, 5, 0 }, // LDQ { 0x10dc, 8, 7, 0 }, { 0x10ec, 8, 8, CYCLE_ADJ }, { 0x10fc, 9, 8, 0 }, { 0x10ce, 4, 4, 0 }, // LDS { 0x10de, 6, 5, 0 }, { 0x10ee, 6, 6, CYCLE_ADJ }, { 0x10fe, 7, 6, 0 }, { 0xce, 3, 3, 0 }, // LDU { 0xde, 5, 4, 0 }, { 0xee, 5, 5, CYCLE_ADJ }, { 0xfe, 6, 5, 0 }, { 0x1086, 4, 4, 0 }, // LDW { 0x1096, 6, 5, 0 }, { 0x10a6, 6, 6, CYCLE_ADJ }, { 0x10b6, 7, 6, 0 }, { 0x8e, 3, 3, 0 }, // LDX { 0x9e, 5, 4, 0 }, { 0xae, 5, 5, CYCLE_ADJ }, { 0xbe, 6, 5, 0 }, { 0x108e, 4, 4, 0 }, // LDY { 0x109e, 6, 5, 0 }, { 0x10ae, 6, 6, CYCLE_ADJ }, { 0x10be, 7, 6, 0 }, { 0x113d, 5, 5, 0 }, // LDMD { 0x30, 4, 4, CYCLE_ADJ }, // LEA { 0x31, 4, 4, CYCLE_ADJ }, { 0x32, 4, 4, CYCLE_ADJ }, { 0x33, 4, 4, CYCLE_ADJ }, { 0x44, 2, 1, 0 }, // LSRA { 0x54, 2, 1, 0 }, // LSRB { 0x1044, 3, 2, 0 }, // LSRD { 0x1054, 3, 2, 0 }, // LSRW { 0x04, 6, 5, 0 }, // LSR { 0x64, 6, 6, CYCLE_ADJ }, { 0x74, 7, 6, 0 }, { 0x3d, 11, 10, 0 }, // MUL { 0x118f, 28, 28, 0 }, // MULD { 0x119f, 30, 29, 0 }, { 0x11af, 30, 30, CYCLE_ADJ }, { 0x11bf, 31, 30, 0 }, { 0x40, 2, 1, 0 }, // NEGA { 0x50, 2, 1, 0 }, // NEGB { 0x1040, 3, 2, 0 }, // NEGD { 0x00, 6, 5, 0 }, // NEG { 0x60, 6, 6, CYCLE_ADJ }, { 0x70, 7, 6, 0 }, { 0x12, 2, 1, 0 }, // NOP { 0x01, 6, 6, 0 }, // OIM { 0x61, 7, 7, CYCLE_ADJ }, { 0x71, 7, 7, 0 }, { 0x8a, 2, 2, 0 }, // ORA { 0x9a, 4, 3, 0 }, { 0xaa, 4, 4, CYCLE_ADJ }, { 0xba, 5, 4, 0 }, { 0xca, 2, 2, 0 }, // ORB { 0xda, 4, 3, 0 }, { 0xea, 4, 4, CYCLE_ADJ }, { 0xfa, 5, 4, 0 }, { 0x1a, 3, 2, 0 }, // ORCC { 0x108a, 5, 4, 0 }, // ORD { 0x109a, 7, 5, 0 }, { 0x10aa, 7, 6, CYCLE_ADJ }, { 0x10ba, 8, 6, 0 }, { 0x34, 5, 4, CYCLE_ADJ }, // PSHS { 0x36, 5, 4, CYCLE_ADJ }, // PSHU { 0x35, 5, 4, CYCLE_ADJ }, // PULS { 0x37, 5, 4, CYCLE_ADJ }, // PULU { 0x1038, 6, 6, 0 }, // PSHSW { 0x103a, 6, 6, 0 }, // PSHUW { 0x1039, 6, 6, 0 }, // PULSW { 0x103b, 6, 6, 0 }, // PULUW { 0x49, 2, 1, 0 }, // ROLA { 0x59, 2, 1, 0 }, // ROLB { 0x1049, 3, 2, 0 }, // ROLD { 0x1059, 3, 2, 0 }, // ROLW { 0x09, 6, 5, 0 }, // ROL { 0x69, 6, 6, CYCLE_ADJ }, { 0x79, 7, 6, 0 }, { 0x46, 2, 1, 0 }, // RORA { 0x56, 2, 1, 0 }, // RORB { 0x1046, 3, 2, 0 }, // RORD { 0x1056, 3, 2, 0 }, // RORW { 0x06, 6, 5, 0 }, // ROR { 0x66, 6, 6, CYCLE_ADJ }, { 0x76, 7, 6, 0 }, { 0x3b, 6, 17, CYCLE_ESTIMATED }, // RTI { 0x39, 5, 4, 0 }, // RTS { 0x82, 2, 2, 0 }, // SBCA { 0x92, 4, 3, 0 }, { 0xa2, 4, 4, CYCLE_ADJ }, { 0xb2, 5, 4, 0 }, { 0xc2, 2, 2, 0 }, // SBCB { 0xd2, 4, 3, 0 }, { 0xe2, 4, 4, CYCLE_ADJ }, { 0xf2, 5, 4, 0 }, { 0x1082, 5, 4, 0 }, // SBCD { 0x1092, 7, 5, 0 }, { 0x10a2, 7, 6, CYCLE_ADJ }, { 0x10b2, 8, 6, 0 }, { 0x1d, 2, 1, 0 }, // SEX { 0x14, 4, 4, 0 }, // SEXW { 0x97, 4, 3, 0 }, // STA { 0xa7, 4, 4, CYCLE_ADJ }, { 0xb7, 5, 4, 0 }, { 0xd7, 4, 3, 0 }, // STB { 0xe7, 4, 4, CYCLE_ADJ }, { 0xf7, 5, 4, 0 }, { 0x1137, 8, 7, 0 }, // STBT { 0xdd, 5, 4, 0 }, // STD { 0xed, 5, 5, CYCLE_ADJ }, { 0xfd, 6, 5, 0 }, { 0x1197, 5, 4, 0 }, // STE { 0x11a7, 5, 5, CYCLE_ADJ }, { 0x11b7, 6, 5, 0 }, { 0x11d7, 5, 4, 0 }, // STF { 0x11e7, 5, 5, CYCLE_ADJ }, { 0x11f7, 6, 5, 0 }, { 0x10dd, 8, 7, 0 }, // STQ { 0x10ed, 8, 8, CYCLE_ADJ }, { 0x10fd, 9, 8, 0 }, { 0x10df, 6, 5, 0 }, // STS { 0x10ef, 6, 6, CYCLE_ADJ }, { 0x10ff, 7, 6, 0 }, { 0xdf, 5, 4, 0 }, // STU { 0xef, 5, 5, CYCLE_ADJ }, { 0xff, 6, 5, 0 }, { 0x1097, 6, 5, 0 }, // STW { 0x10a7, 6, 6, CYCLE_ADJ }, { 0x10b7, 7, 6, 0 }, { 0x9f, 5, 4, 0 }, // STX { 0xaf, 5, 5, CYCLE_ADJ }, { 0xbf, 6, 5, 0 }, { 0x109f, 6, 5, 0 }, // STY { 0x10af, 6, 6, CYCLE_ADJ }, { 0x10bf, 7, 6, 0 }, { 0x80, 2, 2, 0 }, // SUBA { 0x90, 4, 3, 0 }, { 0xa0, 4, 4, CYCLE_ADJ }, { 0xb0, 5, 4, 0 }, { 0xc0, 2, 2, 0 }, // SUBB { 0xd0, 4, 3, 0 }, { 0xe0, 4, 4, CYCLE_ADJ }, { 0xf0, 5, 4, 0 }, { 0x83, 4, 3, 0 }, // SUBD { 0x93, 6, 4, 0 }, { 0xa3, 6, 5, CYCLE_ADJ }, { 0xb3, 7, 5, 0 }, { 0x1180, 3, 3, 0 }, // SUBE { 0x1190, 5, 4, 0 }, { 0x11a0, 5, 5, CYCLE_ADJ }, { 0x11b0, 6, 5, 0 }, { 0x11c0, 3, 3, 0 }, // SUBF { 0x11d0, 5, 4, 0 }, { 0x11e0, 5, 5, CYCLE_ADJ }, { 0x11f0, 6, 5, 0 }, { 0x1080, 5, 4, 0 }, // SUBW { 0x1090, 7, 5, 0 }, { 0x10a0, 7, 6, CYCLE_ADJ }, { 0x10b0, 8, 6, 0 }, { 0x3f, 19, 21, 0 }, // SWI { 0x103f, 20, 22, 0 }, // SWI2 { 0x113f, 20, 22, 0 }, // SWI3 { 0x13, 2, 1, CYCLE_ESTIMATED }, // SYNC { 0x1f, 6, 4, 0 }, // TFR { 0x0b, 6, 6, CYCLE_ESTIMATED }, // TIM { 0x6b, 7, 7, CYCLE_ADJ | CYCLE_ESTIMATED }, { 0x7b, 5, 5, CYCLE_ESTIMATED }, { 0x1138, 6, 6, CYCLE_ESTIMATED }, // TFM { 0x1139, 6, 6, CYCLE_ESTIMATED }, { 0x113a, 6, 6, CYCLE_ESTIMATED }, { 0x113b, 6, 6, CYCLE_ESTIMATED }, { 0x4d, 2, 1, 0 }, // TSTA { 0x5d, 2, 1, 0 }, // TSTB { 0x104d, 3, 2, 0 }, // TSTD { 0x114d, 3, 2, 0 }, // TSTE { 0x115d, 3, 2, 0 }, // TSTF { 0x105d, 3, 2, 0 }, // TSTW { 0x0d, 6, 4, 0 }, // TST { 0x6d, 6, 5, CYCLE_ADJ }, { 0x7d, 7, 5, 0 }, { -1, -1 } }; typedef struct { int cycles_6809_indexed; int cycles_6309_indexed; int cycles_6809_indirect; int cycles_6309_indirect; } indtab_t; static indtab_t indtab[] = { { 2, 1, -1, -1, }, // 0000 ,R+ { 3, 2, 6, 6, }, // 0001 ,R++ [,R++] { 2, 1, -1, -1, }, // 0010 ,-R { 3, 2, 6, 6, }, // 0011 ,--R [,--R] { 0, 0, 3, 3, }, // 0100 ,R [,R] { 1, 1, 4, 4, }, // 0101 B,R [B,R] { 1, 1, 4, 4, }, // 0110 A,R [A,R] { 1, 1, 1, 1, }, // 0111 E,R [E,R] { 1, 1, 4, 4, }, // 1000 n,R [n,R] { 4, 3, 7, 7, }, // 1001 n,R [n,R] (16 bit) { 1, 1, 1, 1, }, // 1010 F,R [F,R] { 4, 2, 4, 4, }, // 1011 D,R [D,R] { 1, 1, 4, 4, }, // 1100 n,PC [n,PC] { 5, 3, 8, 8, }, // 1101 n,PC [n,PC] (16 bit) { 4, 1, 4, 4, }, // 1110 W,R [W,R] { -1, -1, 5, 5, }, // 1111 [n] (16 bit) }; /* calculates additional ticks from post byte in both indexed and indirect modes */ int lwasm_cycle_calc_ind(line_t *cl) { int pb = cl->pb; if ((pb & 0x80) == 0) /* 5 bit offset */ return 1; // These need special handling because the *register* bits determine the specific operation (and, thus, cycle counts) if (!CURPRAGMA(cl, PRAGMA_6809)) { switch (pb) { case 0x8f: // ,W return 0; case 0xaf: // n,W (16 bit) return 2; case 0xcf: // ,W++ case 0xef: // ,--W return 1; case 0x90: // [,W] return 3; case 0xb0: // [n,W] (16 bit) return 5; case 0xd0: // [,W++] case 0xf0: // [,--W] return 4; } } if (pb & 0x10) /* indirect */ return CURPRAGMA(cl, PRAGMA_6809) ? indtab[pb & 0xf].cycles_6809_indirect : indtab[pb & 0xf].cycles_6309_indirect; else return CURPRAGMA(cl, PRAGMA_6809) ? indtab[pb & 0xf].cycles_6809_indexed : indtab[pb & 0xf].cycles_6309_indexed; } /* calculate additional ticks from post byte in rlist (PSHS A,B,X...) */ int lwasm_cycle_calc_rlist(line_t *cl) { int i, cycles = 0; for (i = 0; i < 8; i++) { // 1 cycle for 8 bit regs CC-DP (bits 0-3) // otherwise 2 if (cl->pb & 1 << i) cycles += (i <= 3) ? 1 : 2; } return cycles; } void lwasm_cycle_update_count(line_t *cl, int opc) { int i; for (i = 0; 1; i++) { if (cycletable[i].opc == -1) return; if (cycletable[i].opc == opc) { cl->cycle_base = CURPRAGMA(cl, PRAGMA_6809) ? cycletable[i].cycles_6809 : cycletable[i].cycles_6309; cl->cycle_flags = cycletable[i].flags; cl->cycle_adj = 0; // long branches are estimated on 6809 if (CURPRAGMA(cl, PRAGMA_6809) && (opc >= 0x1022 && opc <= 0x102f)) cl->cycle_flags |= CYCLE_ESTIMATED; return; } } }