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debug shell - @ and ^ indirection.

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This commit is contained in:
Kelvin Sherlock 2019-02-06 22:46:08 -05:00
parent 2fb1249c96
commit b7ff6d56e8
1 changed files with 28 additions and 5 deletions
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33
src/debug_shell.re2c
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@ -635,7 +635,7 @@ static int parse_command(const char *cp) {
_ = (" " | "\x00");
* { --YYCURSOR; if (cp == YYCURSOR) goto next; return -1; }
* { --YYCURSOR; if (cp == YYCURSOR) goto command; return -1; }
"a=" { return do_assign(YYCURSOR, REG_A); }
"x=" { return do_assign(YYCURSOR, REG_X); }
@ -663,24 +663,47 @@ static int parse_command(const char *cp) {
addr = to_hex(cp, cp + 6);
has_bank = 1;
has_addr = 1;
goto next;
goto indir;
}
x{2} "/" x{4} {
addr = to_hex(cp, cp + 2) << 16;
addr |= to_hex(cp + 3, cp + 7);
has_bank = 1;
has_addr = 1;
goto next;
goto indir;
}
x{1,4} {
addr = to_hex(cp, YYCURSOR);
has_bank = 0;
has_addr = 1;
goto next;
goto indir;
}
*/
next:
indir:
/* only gets here if address specified */
for(;;) {
/*!re2c
"" { break; }
"^" {
/* 3-byte indirection */
if (!has_bank) addr = (g_prev_address & 0xff0000) | addr;
addr = get_memory24_c(addr, 0);
has_bank = 1;
continue;
}
"@" {
/* 2-byte indirection */
/* 3-byte indirection */
if (!has_bank) addr = (g_prev_address & 0xff0000) | addr;
word32 b = addr & 0xff0000;
addr = get_memory16_c(addr, 0) | b;
has_bank = 1;
continue;
}
*/
}
command:
/*!re2c
* { return -1; }
";l" end {