mirror of
https://github.com/uffejakobsen/acme.git
synced 2025-04-08 20:37:20 +00:00
more cleanup - moved some stuff between files
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@28 4df02467-bbd4-4a76-a152-e7ce94205b78
This commit is contained in:
marcobaye
parent
538dd38861
commit
e1516161ce
@ -186,11 +186,11 @@ static int perform_pass(void)
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int ii;
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// call modules' "pass init" functions
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Output_passinit(); // disable output (until PC gets set)
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CPU_passinit(default_cpu); // set default cpu values (PC undefined)
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Output_passinit(); // disable output, PC undefined
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CPU_passinit(default_cpu); // set default cpu type
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// if start address was given on command line, use it:
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if (start_address != ILLEGAL_START_ADDRESS)
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CPU_set_pc(start_address, 0);
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vcpu_set_pc(start_address, 0);
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Encoding_passinit(); // set default encoding
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Section_passinit(); // set initial zone (untitled)
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// init variables
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@ -12,12 +12,12 @@
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#include <math.h> // only for fp support
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#include "platform.h"
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#include "alu.h"
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#include "cpu.h"
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#include "dynabuf.h"
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#include "encoding.h"
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#include "global.h"
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#include "input.h"
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#include "label.h"
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#include "output.h"
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#include "section.h"
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#include "tree.h"
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@ -485,9 +485,11 @@ static void parse_octal_value(void) // Now GotByte = "&"
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// Parse program counter ('*')
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static void parse_program_counter(void) // Now GotByte = "*"
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{
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struct result_int_t pc;
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GetByte();
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// FIXME - read pc via function call, then move cpu struct from .h to .c file
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PUSH_INTOPERAND(CPU_state.pc.intval, CPU_state.pc.flags | MVALUE_EXISTS);
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vcpu_read_pc(&pc);
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PUSH_INTOPERAND(pc.intval, pc.flags | MVALUE_EXISTS);
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}
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@ -116,9 +116,10 @@ static enum eos PO_binary(void)
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fclose(fd);
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// if verbose, produce some output
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if ((pass_count == 0) && (Process_verbosity > 1)) {
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// FIXME - read "add_to_pc" via function call so struct can be moved from .h to .c file
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int amount = vcpu_get_statement_size();
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printf("Loaded %d (0x%04x) bytes from file offset %ld (0x%04lx).\n",
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CPU_state.add_to_pc, CPU_state.add_to_pc, skip, skip);
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amount, amount, skip, skip);
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}
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return ENSURE_EOS;
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}
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60
src/cpu.c
60
src/cpu.c
@ -2,7 +2,7 @@
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// Copyright (C) 1998-2014 Marco Baye
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// Have a look at "acme.c" for further info
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//
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// CPU stuff
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// CPU type stuff
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#include "config.h"
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#include "alu.h"
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#include "cpu.h"
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@ -15,7 +15,6 @@
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// constants
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// FIXME - move to new cpu_type.c file
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static struct cpu_type cpu_type_6502 = {
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keyword_is_6502mnemo,
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CPUFLAG_INDIRECTJMPBUGGY, // JMP ($xxFF) is buggy
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@ -55,7 +54,6 @@ static struct cpu_type cpu_type_65816 = {
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// variables
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// predefined stuff
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// FIXME - move to cpu_type.c file
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static struct node_t *CPU_tree = NULL; // tree to hold CPU types
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static struct node_t CPUs[] = {
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// PREDEFNODE("z80", &cpu_type_Z80),
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@ -68,13 +66,12 @@ static struct node_t CPUs[] = {
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// ^^^^ this marks the last element
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};
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// FIXME - make static
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struct cpu CPU_state; // current CPU state
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// insert byte until PC fits condition
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// FIXME - move to basics.c
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static enum eos PO_align(void)
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{
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// FIXME - read cpu state via function call!
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intval_t and,
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equal,
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fill,
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@ -101,7 +98,6 @@ static enum eos PO_align(void)
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}
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// FIXME - move to cpu_type.c file
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// try to find CPU type held in DynaBuf. Returns whether succeeded.
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// FIXME - why not return ptr (or NULL to indicate failure)?
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int CPU_find_cpu_struct(const struct cpu_type **target)
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@ -145,10 +141,11 @@ static enum eos PO_realpc(void)
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// start offset assembly
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// FIXME - split into PO (move to basics.c) and backend
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// FIXME - split into PO (move to basics.c) and backend (move to output.c)
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// TODO - add a label argument to assign the block size afterwards (for assemble-to-end-address)
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static enum eos PO_pseudopc(void)
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{
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// FIXME - read pc using a function call!
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intval_t new_pc,
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new_offset;
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int outer_flags = CPU_state.pc.flags;
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@ -171,45 +168,6 @@ static enum eos PO_pseudopc(void)
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}
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// set program counter to defined value (FIXME - allow for undefined!)
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// if start address was given on command line, main loop will call this before each pass.
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// in addition to that, it will be called on each "* = VALUE".
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void CPU_set_pc(intval_t new_pc, int segment_flags)
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{
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intval_t new_offset;
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new_offset = (new_pc - CPU_state.pc.intval) & 0xffff;
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CPU_state.pc.intval = new_pc;
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CPU_state.pc.flags |= MVALUE_DEFINED; // FIXME - remove when allowing undefined!
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// now tell output buffer to start a new segment
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Output_start_segment(new_offset, segment_flags);
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}
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/*
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FIXME - TODO:
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general stuff: PC and mem ptr might be marked as "undefined" via flags field.
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However, their "value" fields are still updated, so we can calculate differences.
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on pass init:
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if value given on command line, set PC and out ptr to that value
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otherwise, set both to zero and mark as "undefined"
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when ALU asks for "*":
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return current PC (value and flags)
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when encountering "!pseudopc VALUE { BLOCK }":
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parse new value (NEW: might be undefined!)
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remember difference between current and new value
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set PC to new value
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after BLOCK, use remembered difference to change PC back
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when encountering "* = VALUE":
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parse new value (NEW: might be undefined!)
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calculate difference between current PC and new value
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set PC to new value
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tell outbuf to add difference to mem ptr (starting a new segment) - if new value is undefined, tell outbuf to disable output
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Problem: always check for "undefined"; there are some problematic combinations.
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I need a way to return the size of a generated code block even if PC undefined.
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*/
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// if cpu type and value match, set register length variable to value.
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// if cpu type and value don't match, complain instead.
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static void check_and_set_reg_length(int *var, int make_long)
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@ -235,14 +193,14 @@ static enum eos set_register_length(int *var, int make_long)
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}
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// switch to long accu ("!al" pseudo opcode)
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// switch to long accumulator ("!al" pseudo opcode)
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static enum eos PO_al(void)
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{
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return set_register_length(&CPU_state.a_is_long, TRUE);
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}
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// switch to short accu ("!as" pseudo opcode)
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// switch to short accumulator ("!as" pseudo opcode)
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static enum eos PO_as(void)
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{
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return set_register_length(&CPU_state.a_is_long, FALSE);
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@ -283,16 +241,10 @@ void CPU_passinit(const struct cpu_type *cpu_type)
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{
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// handle cpu type (default is 6502)
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CPU_state.type = cpu_type ? cpu_type : &cpu_type_6502;
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CPU_state.pc.flags = 0; // not defined yet
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CPU_state.pc.intval = 0; // same as output's write_idx on pass init
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CPU_state.add_to_pc = 0; // increase PC by this at end of statement
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CPU_state.a_is_long = FALSE; // short accu
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CPU_state.xy_are_long = FALSE; // short index regs
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}
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// create cpu type tree (is done early)
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// FIXME - move to cpu_type.c
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void CPUtype_init(void)
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{
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Tree_add_table(&CPU_tree, CPUs);
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32
src/cpu.h
32
src/cpu.h
@ -2,55 +2,33 @@
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// Copyright (C) 1998-2014 Marco Baye
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// Have a look at "acme.c" for further info
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//
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// CPU stuff
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#ifndef cpu_H
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#define cpu_H
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// CPU type stuff
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#ifndef cpu_type_H
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#define cpu_type_H
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#include "config.h"
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// FIXME - create cpu_type.c file and move cpu type stuff to it
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// CPU type structure definition
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struct cpu_type {
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// This function is not allowed to change GlobalDynaBuf
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// because that's where the mnemonic is stored!
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int (*keyword_is_mnemonic)(int);
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int flags;
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int flags; // see below for bit meanings
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char default_align_value;
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};
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#define CPUFLAG_INDIRECTJMPBUGGY (1u << 0) // warn if "jmp ($xxff)" is assembled
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#define CPUFLAG_SUPPORTSLONGREGS (1u << 1) // allow "!al" and "!rl" pseudo opcodes
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#define CPUFLAG_AB_NEEDS_0_ARG (1u << 2) // warn if "lxa #$xx" uses non-zero arg
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// current CPU state
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// FIXME - move struct definition to .c file and change other .c files' accesses to fn calls
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struct cpu {
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const struct cpu_type *type; // current CPU type (default 6502)
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struct result_int_t pc; // current program counter (pseudo value)
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int add_to_pc; // add to PC after statement
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int a_is_long;
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int xy_are_long;
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};
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// variables
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// FIXME - restrict visibility to cpu.c file
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extern struct cpu CPU_state; // current CPU state
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// FIXME - move to new cpu_type.h file
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// create cpu type tree (is done early)
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extern void CPUtype_init(void);
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// register pseudo opcodes (done later)
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extern void CPU_init(void);
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// set default values for pass
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// set default value for pass
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extern void CPU_passinit(const struct cpu_type *cpu_type);
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// set program counter to defined value (FIXME - allow undefined!)
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extern void CPU_set_pc(intval_t new_pc, int flags);
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// FIXME - move to new cpu_type.h file
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// try to find CPU type held in DynaBuf. Returns whether succeeded.
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// FIXME - why not simply return struct ptr, or NULL in case of failure?
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extern int CPU_find_cpu_struct(const struct cpu_type **target);
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@ -299,10 +299,7 @@ void Parse_until_eob_or_eof(void)
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}
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}
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} while (GotByte != CHAR_EOS); // until end-of-statement
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// adjust program counter
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// FIXME - next two lines should be a function call!
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CPU_state.pc.intval = (CPU_state.pc.intval + CPU_state.add_to_pc) & 0xffff;
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CPU_state.add_to_pc = 0;
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vcpu_end_statement(); // adjust program counter
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// go on with next byte
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GetByte(); //NEXTANDSKIPSPACE();
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}
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13
src/label.c
13
src/label.c
@ -9,11 +9,11 @@
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#include <stdio.h>
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#include "acme.h"
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#include "alu.h"
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#include "cpu.h"
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#include "dynabuf.h"
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#include "global.h"
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#include "input.h"
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#include "label.h"
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#include "output.h"
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#include "platform.h"
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#include "section.h"
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#include "tree.h"
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@ -206,16 +206,17 @@ static struct node_t pseudo_opcodes[] = {
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// GlobalDynaBuf holds the label name.
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void Label_implicit_definition(zone_t zone, int stat_flags, int force_bit, int change)
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{
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struct result_t result;
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struct label *label;
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struct result_int_t pc;
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struct result_t result;
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struct label *label;
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label = Label_find(zone, force_bit);
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// implicit label definition (label)
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if ((stat_flags & SF_FOUND_BLANK) && warn_on_indented_labels)
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Throw_first_pass_warning("Implicit label definition not in leftmost column.");
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// FIXME - read pc via function call!
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result.flags = CPU_state.pc.flags & MVALUE_DEFINED;
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result.val.intval = CPU_state.pc.intval;
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vcpu_read_pc(&pc);
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result.flags = pc.flags & MVALUE_DEFINED;
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result.val.intval = pc.intval;
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Label_set_value(label, &result, change);
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}
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75
src/output.c
75
src/output.c
@ -49,10 +49,12 @@ struct output {
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struct segment list_head; // head element of doubly-linked ring list
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} segment;
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};
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static struct output default_output;
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static struct output *out = &default_output;
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// variables
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static struct output default_output;
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static struct output *out = &default_output;
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// FIXME - make static
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struct vcpu CPU_state; // current CPU state
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// FIXME - move file format stuff to some other .c file!
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// predefined stuff
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@ -480,6 +482,13 @@ void Output_passinit(void)
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out->segment.start = NO_SEGMENT_START; // TODO - "no active segment" could be made a segment flag!
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out->segment.max = OUTBUFFERSIZE - 1;
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out->segment.flags = 0;
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//vcpu stuff:
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CPU_state.pc.flags = 0; // not defined yet
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CPU_state.pc.intval = 0; // same as output's write_idx on pass init
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CPU_state.add_to_pc = 0; // increase PC by this at end of statement
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CPU_state.a_is_long = FALSE; // short accu
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CPU_state.xy_are_long = FALSE; // short index regs
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}
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@ -537,6 +546,46 @@ void Output_start_segment(intval_t address_change, int segment_flags)
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// TODO - add "!skip AMOUNT" pseudo opcode as alternative to "* = * + AMOUNT" (needed for assemble-to-end-address)
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// set program counter to defined value (FIXME - allow for undefined!)
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// if start address was given on command line, main loop will call this before each pass.
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// in addition to that, it will be called on each "* = VALUE".
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void vcpu_set_pc(intval_t new_pc, int segment_flags)
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{
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intval_t new_offset;
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new_offset = (new_pc - CPU_state.pc.intval) & 0xffff;
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CPU_state.pc.intval = new_pc;
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CPU_state.pc.flags |= MVALUE_DEFINED; // FIXME - remove when allowing undefined!
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// now tell output buffer to start a new segment
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Output_start_segment(new_offset, segment_flags);
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}
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/*
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FIXME - TODO:
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general stuff: PC and mem ptr might be marked as "undefined" via flags field.
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However, their "value" fields are still updated, so we can calculate differences.
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on pass init:
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if value given on command line, set PC and out ptr to that value
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otherwise, set both to zero and mark as "undefined"
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when ALU asks for "*":
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return current PC (value and flags)
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when encountering "!pseudopc VALUE { BLOCK }":
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parse new value (NEW: might be undefined!)
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remember difference between current and new value
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set PC to new value
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after BLOCK, use remembered difference to change PC back
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when encountering "* = VALUE":
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parse new value (NEW: might be undefined!)
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calculate difference between current PC and new value
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set PC to new value
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tell outbuf to add difference to mem ptr (starting a new segment) - if new value is undefined, tell outbuf to disable output
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Problem: always check for "undefined"; there are some problematic combinations.
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I need a way to return the size of a generated code block even if PC undefined.
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*/
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// called when "* = EXPRESSION" is parsed
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// setting program counter via "* = VALUE"
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// FIXME - move to basics.c
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@ -560,7 +609,27 @@ void PO_setpc(void)
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segment_flags |= (int) node_body;
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}
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CPU_set_pc(new_addr, segment_flags);
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vcpu_set_pc(new_addr, segment_flags);
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}
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// get program counter
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void vcpu_read_pc(struct result_int_t *target)
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{
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*target = CPU_state.pc;
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}
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// get size of current statement (until now) - needed for "!bin" verbose output
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int vcpu_get_statement_size(void)
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{
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return CPU_state.add_to_pc;
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}
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// adjust program counter (called at end of each statement)
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void vcpu_end_statement(void)
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{
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CPU_state.pc.intval = (CPU_state.pc.intval + CPU_state.add_to_pc) & 0xffff;
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CPU_state.add_to_pc = 0;
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}
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27
src/output.h
27
src/output.h
@ -11,10 +11,26 @@
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#include "config.h"
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// Constants
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// constants
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#define MEMINIT_USE_DEFAULT 256
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// current CPU state
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// FIXME - move struct definition to .c file and change other .c files' accesses to fn calls
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struct vcpu {
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const struct cpu_type *type; // current CPU type (default 6502) (FIXME - move out of struct again?)
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struct result_int_t pc; // current program counter (pseudo value)
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int add_to_pc; // add to PC after statement
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int a_is_long;
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int xy_are_long;
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};
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// variables
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// FIXME - restrict visibility to .c file
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extern struct vcpu CPU_state; // current CPU state
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// Prototypes
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// Init file format tree (is done early)
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@ -46,5 +62,14 @@ extern void Output_start_segment(intval_t address_change, int segment_flags);
|
||||
// Show start and end of current segment
|
||||
extern void Output_end_segment(void);
|
||||
|
||||
// set program counter to defined value (FIXME - allow undefined!)
|
||||
extern void vcpu_set_pc(intval_t new_pc, int flags);
|
||||
// get program counter
|
||||
extern void vcpu_read_pc(struct result_int_t *target);
|
||||
// get size of current statement (until now) - needed for "!bin" verbose output
|
||||
extern int vcpu_get_statement_size(void);
|
||||
// adjust program counter (called at end of each statement)
|
||||
extern void vcpu_end_statement(void);
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
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Reference in New Issue
Block a user