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implement LI and LA

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This commit is contained in:
Connor Olding 2015-11-21 15:36:54 -08:00
parent 5397085f01
commit 4a45b3c913
1 changed files with 18 additions and 4 deletions
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22
Lua/inject/assembler.lua
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@ -337,8 +337,8 @@ local instruction_handlers = {
SUBIU = {9, 'tsk', 'sti'},
-- ...that expand to multiple instructions
LI = {}, -- only one instruction for values < 0x10000
LA = {}, -- alias for li
LI = 'LI', -- only one instruction for values < 0x10000
LA = 'LA',
BEQI = {},
BNEI = {},
@ -825,8 +825,23 @@ function Parser:instruction()
if h == nil then
self:error('undefined instruction')
elseif h == 'LI' or h == 'LA' then
local lui = instruction_handlers['LUI']
local ori = instruction_handlers['ORI']
local args = {}
args.rt = self:register()
self:optional_comma()
local im = self:const()
if h == 'LA' or im[2] >= 0x10000 then
args.rs = args.rt
args.immediate = {'UPPER', im}
self:format_out(lui[3], lui[1], args, lui[4], lui[5])
else
args.rs = 'R0'
end
args.immediate = {'LOWER', im}
self:format_out(ori[3], ori[1], args, ori[4], ori[5])
elseif h[2] ~= nil then
-- get format from strings
args = self:format_in(h[2])
self:format_out(h[3], h[1], args, h[4], h[5])
else
@ -1117,7 +1132,6 @@ function Dumper:dump()
self.pos = self.pos + t.skip
end
else
--require('pt'){t}
error('Internal Error: unknown command', 1)
end
end