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emit/__emit: Make 'switch', 'casetbl' and 'case' generate valid code

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This changes the way 'switch', 'casetbl' and 'case' are handled; now 'casetbl' can't be used directly and the arguments for the first case table entry (the number of entries and 'default' label) are specified to 'switch'.
Example:
    emit
    {
        load.s.pri my_var
        switch 3 lbl_deafult
        case 0 lbl_0
        case 2 lbl_2
        case 4 lbl_4
    }
This commit is contained in:
Daniel_Cortez 2017-11-13 19:26:40 +07:00
parent b726f44a02
commit d788eeaeb8
1 changed files with 27 additions and 5 deletions
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32
source/compiler/sc1.c
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@ -6063,14 +6063,36 @@ static void OPHANDLER_CALL emit_parm5_gvar(char *name)
outinstr(name,(sizeof p / sizeof p[0]),p);
}
static void OPHANDLER_CALL emit_do_switch(char *name)
{
ucell p[2];
int lbl_table;
emit_param_num(&p[0],1);
emit_param_label(&p[1]);
lbl_table=getlabel();
stgwrite("\tswitch ");
outval((cell)lbl_table,TRUE);
setlabel(lbl_table);
stgwrite("\tcasetbl\n");
stgwrite("\tcase ");
outval(p[0],FALSE);
stgwrite(" ");
outval(p[1],TRUE);
code_idx+=opcodes(2)+opargs(3);
}
static void OPHANDLER_CALL emit_do_case(char *name)
{
ucell p[2];
emit_param_num(&p[1],1);
emit_param_num(&p[0],1);
emit_param_label(&p[1]);
outinstr(name,2,p);
code_idx+=opargs(2)+opcodes(0);
stgwrite("\tcase ");
outval(p[0],FALSE);
stgwrite(" ");
outval(p[1],TRUE);
code_idx+=opargs(2);
}
static void OPHANDLER_CALL emit_do_lodb_strb(char *name)
@ -6125,7 +6147,7 @@ static EMIT_OPCODE emit_opcodelist[] = {
{ 49, "call", emit_do_call },
{ 50, "call.pri", emit_parm0 },
{ 0, "case", emit_do_case },
{130, "casetbl", emit_parm0 },
/*{130, "casetbl", emit_parm0 },*/
{118, "cmps", emit_parm1_num },
{156, "const", emit_parm2_gvar_num },
{ 12, "const.alt", emit_parm1_num },
@ -6256,7 +6278,7 @@ static EMIT_OPCODE emit_opcodelist[] = {
{ 80, "sub.alt", emit_parm0 },
{132, "swap.alt", emit_parm0 },
{131, "swap.pri", emit_parm0 },
{129, "switch", emit_parm1_lbl },
{129, "switch", emit_do_switch },
/*{126, "symbol", do_symbol }, */
/*{136, "symtag", emit_parm1_num }, */
{123, "sysreq.c", emit_parm1_num },