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Added support for single register addressing.

This commit is contained in:
mooz 2018-11-07 22:42:48 +01:00
parent e56a44afa9
commit 6fafc034a0
1 changed files with 17 additions and 0 deletions
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17
l7801.lua
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@ -70,11 +70,20 @@ local opcode_immediate = lookupify{
local opcode_relative = lookupify{
'jr',
}
local opcode_reg = lookupify{
'dcr', 'inr'
}
local opcode_reg_list = {
a = lookupify{'dcr','inr'},
b = lookupify{'dcr','inr'},
c = lookupify{'dcr','inr'},
}
local addressing_map = {
imp = opcode_implied,
imm = opcode_immediate,
rel = opcode_relative,
reg = opcode_reg,
}
local Scope = {
@ -1382,6 +1391,14 @@ local function ParseLua(src, src_name)
end
stat = emit_call{name=op, args={expr, mod_expr}, inverse_encapsulate=inverse_encapsulate, paren_open_white=paren_open_whites} break
end
if opcode_reg[op] then
local register_name = tok:Get(tokenList).Data
if not Registers_7801[register_name] then return false, GenerateError(register_name .. " is not a valid register") end
if not opcode_reg_list[register_name] and opcode_reg_list[register_name][op] then
return false, GenerateError("Opcode " .. op " doesn't support " .. register_name .. " register")
end
stat = emit_call{name=op .. register_name, args={expr}, encapsulate=false} break
end
if opcode_implied[op] then stat = emit_call{name=op} break end
error("internal error: unable to find addressing of valid opcode " .. op) -- should not happen
end