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view lwasm/cycle.c @ 434:052c5f335a92
Fix bug in like terms collection in expression simplification
Like term collection would lose the actual "variable" part of the term if
the second term collected happened to have no coefficient. This would cause
the expression to take the value of the calculated coefficient which is
obviously wrong.
Thanks to hider <stego@satx.rr.com> for reporting the bug and providing a
proper test case.
Observation: this bug has been present since the first pre-release of
lwtools 3.0 when the algebraic expression system was introduced. Apparently
people tend not to create expressions that trigger the like terms handler.
The specific conditions require the symbol to be undefined and the second
operand to the addition has to have no coefficient so it's likely a fairly
rare scenario. Still, it is somewhat surprising that nobody tripped on it
before now.
author | William Astle <lost@l-w.ca> |
---|---|
date | Mon, 23 Jan 2017 22:58:36 -0700 |
parents | 0af33282b518 |
children | b9917c4dc6cf |
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, 6, 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 }, { 0x1081, 3, 3, 0 }, // CMPE { 0x1091, 5, 4, 0 }, { 0x10a1, 5, 5, CYCLE_ADJ }, { 0x10b1, 6, 5, 0 }, { 0x10c1, 3, 3, 0 }, // CMPF { 0x10d1, 5, 4, 0 }, { 0x10e1, 5, 5, CYCLE_ADJ }, { 0x10f1, 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 }, { 0x1181, 5, 4, 0 }, // CMPW { 0x1191, 7, 5, 0 }, { 0x11a1, 7, 6, CYCLE_ADJ }, { 0x11b1, 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; 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; } } }