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disabled NOP mnemonic on m65 cpu

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git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@211 4df02467-bbd4-4a76-a152-e7ce94205b78
This commit is contained in:
marcobaye 2020-06-03 11:02:16 +00:00
parent 5ea2a03174
commit 7a0f9f9528
1 changed files with 17 additions and 2 deletions
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19
src/mnemo.c
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@ -73,7 +73,8 @@ enum mnemogroup {
GROUP_REL16_2, // 16bit relative to pc+2 Byte value = opcode
GROUP_REL16_3, // 16bit relative to pc+3 Byte value = opcode
GROUP_BOTHMOVES, // the "move" commands MVP and MVN Byte value = opcode
GROUP_ZPONLY // rmb0..7 and smb0..7 Byte value = opcode FIXME - use for IDX16COP,IDXeDEW,IDXeINW as well!
GROUP_ZPONLY, // rmb0..7 and smb0..7 Byte value = opcode FIXME - use for IDX16COP,IDXeDEW,IDXeINW as well!
GROUP_PREFIX, // NOP on m65 (throws error) Byte value = opcode
};
// save some space
@ -507,7 +508,9 @@ static struct ronode mnemos_m65[] = {
PREDEFNODE("rolq", MERGE(GROUP_MISC, IDX_ROL | PREFIX_NEGNEG)),
PREDEFNODE("rorq", MERGE(GROUP_MISC, IDX_ROR | PREFIX_NEGNEG)),
PREDEFNODE("inq", MERGE(GROUP_MISC, IDXcINC | PREFIX_NEGNEG)),
PREDEFLAST("deq", MERGE(GROUP_MISC, IDXcDEC | PREFIX_NEGNEG)),
PREDEFNODE("deq", MERGE(GROUP_MISC, IDXcDEC | PREFIX_NEGNEG)),
// because the NOP opcode is used as a prefix code, the mnemonic was disabled:
PREDEFLAST("nop", MERGE(GROUP_PREFIX, 0xea)),
// ^^^^ this marks the last element
};
@ -1079,6 +1082,15 @@ static void group_only_zp(int opcode)
Input_ensure_EOS();
}
// NOP on m65 cpu (FIXME - "!align" outputs NOPs, what about that? what if user writes NEG:NEG?)
static void group_prefix(int opcode)
{
char buffer[100]; // 640K should be enough for anybody
sprintf(buffer, "The chosen CPU uses opcode 0x%02x as a prefix code, do not use this mnemonic!", opcode); // FIXME - add to docs!
Throw_error(buffer);
}
// The jump instructions.
static void group_jump(int index)
{
@ -1156,6 +1168,9 @@ static int check_mnemo_tree(struct ronode *tree, struct dynabuf *dyna_buf)
case GROUP_ZPONLY: // "rmb0..7" and "smb0..7"
group_only_zp(code);
break;
case GROUP_PREFIX: // NOP for m65 cpu
group_prefix(code);
break;
default: // others indicate bugs
Bug_found("IllegalGroupIndex", code);
}