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Add code label forward references.

This commit is contained in:
steve 2001-03-22 05:28:41 +00:00
parent aa31884d3b
commit fa46de1021
2 changed files with 53 additions and 5 deletions
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8
vvp/codes.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/ */
#if !defined(WINNT) #if !defined(WINNT)
#ident "$Id: codes.cc,v 1.4 2001/03/22 05:08:00 steve Exp $" #ident "$Id: codes.cc,v 1.5 2001/03/22 05:28:41 steve Exp $"
#endif #endif
# include "codes.h" # include "codes.h"
@ -106,6 +106,9 @@ void codespace_dump(FILE*fd)
} else if (cop->opcode == &of_JMP) { } else if (cop->opcode == &of_JMP) {
fprintf(fd, "%%jmp 0x%u\n", cop->cptr); fprintf(fd, "%%jmp 0x%u\n", cop->cptr);
} else if (cop->opcode == &of_JMP0) {
fprintf(fd, "%%jmp/0 0x%u\n", cop->cptr);
} else if (cop->opcode == &of_SET) { } else if (cop->opcode == &of_SET) {
fprintf(fd, "%%set 0x%u, %u\n", cop->iptr, cop->bit_idx1); fprintf(fd, "%%set 0x%u, %u\n", cop->iptr, cop->bit_idx1);
@ -118,6 +121,9 @@ void codespace_dump(FILE*fd)
/* /*
* $Log: codes.cc,v $ * $Log: codes.cc,v $
* Revision 1.5 2001/03/22 05:28:41 steve
* Add code label forward references.
*
* Revision 1.4 2001/03/22 05:08:00 steve * Revision 1.4 2001/03/22 05:08:00 steve
* implement %load, %inv, %jum/0 and %cmp/u * implement %load, %inv, %jum/0 and %cmp/u
* *

50
vvp/compile.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/ */
#if !defined(WINNT) #if !defined(WINNT)
#ident "$Id: compile.cc,v 1.9 2001/03/22 05:08:00 steve Exp $" #ident "$Id: compile.cc,v 1.10 2001/03/22 05:28:41 steve Exp $"
#endif #endif
# include "compile.h" # include "compile.h"
@ -121,6 +121,18 @@ struct resolv_list_s {
static struct resolv_list_s*resolv_list = 0; static struct resolv_list_s*resolv_list = 0;
/*
* Instructions may make forward references to labels. In this case,
* the compile makes one of these to remember to retry the
* resolution.
*/
struct cresolv_list_s {
struct cresolv_list_s*next;
struct vvp_code_s*cp;
char*lab;
};
static struct cresolv_list_s*cresolv_list = 0;
/* /*
* Initialize the compiler by allocation empty symbol tables and * Initialize the compiler by allocation empty symbol tables and
@ -287,11 +299,18 @@ void compile_code(char*label, char*mnem, comp_operands_t opa)
tmp = sym_get_value(sym_codespace, opa->argv[idx].symb.text); tmp = sym_get_value(sym_codespace, opa->argv[idx].symb.text);
code->cptr = tmp.num; code->cptr = tmp.num;
if (code->cptr == 0) { if (code->cptr == 0) {
yyerror("functor undefined"); struct cresolv_list_s*res = (struct cresolv_list_s*)
break; calloc(1, sizeof(struct cresolv_list_s));
res->cp = code;
res->lab = opa->argv[idx].symb.text;
res->next = cresolv_list;
cresolv_list = res;
} else {
free(opa->argv[idx].symb.text);
} }
free(opa->argv[idx].symb.text);
break; break;
case OA_FUNC_PTR: case OA_FUNC_PTR:
@ -455,6 +474,26 @@ void compile_cleanup(void)
} }
} }
struct cresolv_list_s*tmp_clist = cresolv_list;
cresolv_list = 0;
while (tmp_clist) {
struct cresolv_list_s*res = tmp_clist;
tmp_clist = res->next;
symbol_value_t val = sym_get_value(sym_codespace, res->lab);
vvp_cpoint_t tmp = val.num;
if (tmp != 0) {
res->cp->cptr = tmp;
free(res->lab);
} else {
fprintf(stderr, "unresolved code label: %s\n", res->lab);
res->next = cresolv_list;
cresolv_list = res;
}
}
} }
void compile_dump(FILE*fd) void compile_dump(FILE*fd)
@ -476,6 +515,9 @@ void compile_dump(FILE*fd)
/* /*
* $Log: compile.cc,v $ * $Log: compile.cc,v $
* Revision 1.10 2001/03/22 05:28:41 steve
* Add code label forward references.
*
* Revision 1.9 2001/03/22 05:08:00 steve * Revision 1.9 2001/03/22 05:08:00 steve
* implement %load, %inv, %jum/0 and %cmp/u * implement %load, %inv, %jum/0 and %cmp/u
* *