From 750b5028a18de8a958db63849b5bae84180dad84 Mon Sep 17 00:00:00 2001
From: jaortega <jaortega>
Date: Wed, 1 Nov 2000 22:53:21 +0000
Subject:

---
 mixlib/xmix_vm.h | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 mixlib/xmix_vm.h

(limited to 'mixlib/xmix_vm.h')

diff --git a/mixlib/xmix_vm.h b/mixlib/xmix_vm.h
new file mode 100644
index 0000000..ea2db61
--- /dev/null
+++ b/mixlib/xmix_vm.h
@@ -0,0 +1,111 @@
+/* ---------------------- xmix_vm.h :
+ * This file contains internal declarations used in the implementation
+ * of the mix_vm_t type.
+ * ------------------------------------------------------------------
+ * Copyright (C) 2000 jose antonio ortega ruiz <jaortega@acm.org>
+ *  
+ * This program 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *  
+ */
+
+
+#ifndef XMIX_VM_H
+#define XMIX_VM_H
+
+#include "mix_symbol_table.h"
+#include "mix_device.h"
+#include "mix_vm.h"
+
+/* The mix_vm_t type */
+enum {IREG_NO_ = 6, BD_NO_ = 21, MEM_CELLS_NO_ = MIX_VM_CELL_NO};
+struct mix_vm_t 
+{
+  mix_word_t reg[IREG_NO_+3];
+  mix_word_t cell[MEM_CELLS_NO_];
+  gboolean overflow;
+  mix_cmpflag_t cmpflag;
+  mix_short_t loc_count;
+  gboolean is_halted;
+  mix_device_t * devices[BD_NO_]; 
+  mix_address_t start_addr;	/* start address of loaded file */
+  GTree *line_table;		/* source line no -> address  */
+  gint8 bp[MEM_CELLS_NO_/8];	/* each bit signals a break point */
+  mix_symbol_table_t *symbol_table;
+};
+
+/* Macros for accessing/modifying the above structure.
+ * Warning: the arguments of these macros must not have side-effects.
+ */
+#define IOK_(idx) ( (idx) > 0 && (idx) < IREG_NO_+1 )
+#define MEMOK_(addr) ( mix_short_is_positive(addr) && (addr) < MEM_CELLS_NO_ )
+#define REGOK_(r) ( (r) >= 0 && (r) < IREG_NO_ + 3 )
+
+enum { A_ = 0, X_, J_, I1_, I2_, I3_, I4_, I5_, I6_ };
+
+#define get_reg_(vm, r) ((vm)->reg[r])
+#define get_rA_(vm)  get_reg_(vm, A_)
+#define get_rX_(vm)  get_reg_(vm, X_)
+#define get_rJ_(vm)  get_reg_(vm, J_)
+#define get_rI_(vm,idx) get_reg_(vm, I1_ + (idx) - 1)
+#define get_cell_(vm,addr) ( MEMOK_(addr) ? vm->cell[addr] : MIX_WORD_ZERO )
+#define get_cell_ptr_(vm,addr) ( MEMOK_(addr) ? (vm->cell) + addr : NULL )
+#define get_cmp_(vm) (vm->cmpflag)
+#define get_over_(vm) (vm->overflow)
+#define get_loc_(vm)  (vm->loc_count)
+
+#define set_reg_(vm,r,x)			\
+do {						\
+  if ( REGOK_(r) ) vm->reg[r] = (x);		\
+} while (FALSE)
+
+#define set_rA_(vm,x)  set_reg_(vm,A_,x)
+#define set_rX_(vm,x)  set_reg_(vm,X_,x)
+#define set_rJ_(vm,x)  set_reg_(vm,J_,(x)&MIX_SHORT_MAX)
+#define set_rI_(vm,idx,x)  set_reg_(vm,(idx) + I1_ - 1,x)
+
+#define set_cell_(vm,addr,x) 			\
+do {						\
+  if ( MEMOK_(addr) ) (vm)->cell[addr] = (x);	\
+} while (FALSE)
+
+#define set_cmp_(vm,x) (vm)->cmpflag = (x)
+#define set_over_(vm,x) (vm)->overflow = (x)
+#define set_loc_(vm,x)  (vm)->loc_count = (x)&MIX_SHORT_MAX
+
+#define inc_loc_(vm)   				\
+do {						\
+  vm->loc_count++;				\
+  vm->loc_count &= MIX_SHORT_MAX;		\
+} while(FALSE)
+
+#define is_halted_(vm) ((vm)->is_halted)
+#define halt_(vm,val) ((vm)->is_halted = (val))
+#define set_start_(vm,val) ((vm)->start_addr = (val))
+#define reset_loc_(vm) set_loc_ (vm, vm->start_addr)
+
+/* Breakpoints handling */
+#define bp_clear_all_(vm)	memset (vm->bp, 0, MEM_CELLS_NO_/8)
+#define bp_set_(vm,addr)	vm->bp[(addr)>>3] |= 1 << ((addr)&7)
+#define bp_clear_(vm,addr)	vm->bp[(addr)>>3] &= ~(1 << ((addr)&7))
+#define bp_is_set_(vm,addr)	vm->bp[(addr)>>3] & (1 << ((addr)&7))
+
+/* Instruction handlers */
+typedef gboolean (*ins_handler_t_)(mix_vm_t *,const mix_ins_t *);
+
+extern ins_handler_t_ ins_handlers_[MIX_BYTE_MAX + 1];
+
+
+#endif /* XMIX_VM_H */
+
-- 
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