Mercurial > hg > index.cgi
view lwasm/instab.h @ 408:0af33282b518
Fix cycle counting for relative branches.
The original creator of the cycle counting code appears to have mangled two
different approaches to counting the cycles for relative branches into the
final product which led to counting too many cycles for the branch
instructions. The comments in the cycle table were correct but the code was
doing some incorrect things.
Also add the missing LBRN entry to the cycle table. The one labelled LBRN
was not, in fact, LBRN, but one of the actual useful branch instructions.
author | William Astle <lost@l-w.ca> |
---|---|
date | Thu, 03 Mar 2016 21:38:21 -0700 |
parents | 4fd16faa4d93 |
children | e97f9a302c6a |
line wrap: on
line source
/* instab.h Copyright © 2008 William Astle This file is part of LWASM. LWASM 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/>. Contains definitions for the instruction table */ #ifndef __instab_h_seen__ #define __instab_h_seen__ #include "lwasm.h" typedef struct { char *opcode; /* the mneumonic */ int ops[4]; /* opcode values for up to four addr modes */ void (*parse)(asmstate_t *as, line_t *l, char **optr); /* parse operand for insn */ void (*resolve)(asmstate_t *as, line_t *l, int force); /* resolve instruction to code */ void (*emit)(asmstate_t *as, line_t *l); /* resolve instruction to code */ int flags; /* flag for this instruction */ } instab_t; enum { lwasm_insn_cond = 1, /* conditional instruction */ lwasm_insn_endm = 1 << 1, /* end of macro */ lwasm_insn_setsym = 1 << 2, /* insn sets symbol address */ lwasm_insn_is6309 = 1 << 3, /* insn is 6309 only */ lwasm_insn_struct = 1 << 4, /* insn allowed in a struct */ lwasm_insn_setdata = 1 << 5, /* insn uses the data address for symbols */ lwasm_insn_is6800 = 1 << 6, /* insn is a 6800 compatibility operation */ lwasm_insn_is6809 = 1 << 7, /* insn is 6809 only */ lwasm_insn_is6809conv = 1 << 8, /* insn is 6809 convenience only */ lwasm_insn_is6309conv = 1 << 9, /* insn is 6309 convenience only */ lwasm_insn_normal = 0 }; #define PARSEFUNC(fn) void (fn)(asmstate_t *as, line_t *l, char **p) #define RESOLVEFUNC(fn) void (fn)(asmstate_t *as, line_t *l, int force) #define EMITFUNC(fn) void (fn)(asmstate_t *as, line_t *l) extern instab_t instab[]; #endif //__instab_h_seen__