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optimize LI/LA

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Connor Olding 2015-11-24 16:34:18 -08:00
parent 89fcdd825d
commit 32368f3998
1 changed files with 8 additions and 3 deletions
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11
lips.lua
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@ -917,19 +917,24 @@ function Parser:instruction()
args.rt = self:register() args.rt = self:register()
self:optional_comma() self:optional_comma()
local im = self:const() local im = self:const()
local is_label = im[1] == 'LABELSYM' local is_label = im[1] == 'LABELSYM'
-- this is really just semantics as far as i can tell
if h == 'LI' and is_label then if h == 'LI' and is_label then
self:error('use LA for labels') self:error('use LA for labels')
end end
if h == 'LA' and not is_label then if h == 'LA' and not is_label then
self:error('use LI for immediates') self:error('use LI for immediates')
end end
if h == 'LA' or im[2] >= 0x10000 then
if im[2] >= 0x10000 then
args.rs = args.rt args.rs = args.rt
args.immediate = {'UPPER', im} args.immediate = {'UPPER', im}
self:format_out(lui[3], lui[1], args, lui[4], lui[5]) self:format_out(lui[3], lui[1], args, lui[4], lui[5])
args.immediate = {'LOWER', im} if im[2] % 0x10000 ~= 0 then
self:format_out(ori[3], ori[1], args, ori[4], ori[5]) args.immediate = {'LOWER', im}
self:format_out(ori[3], ori[1], args, ori[4], ori[5])
end
else else
args.rs = 'R0' args.rs = 'R0'
args.immediate = {'LOWER', im} args.immediate = {'LOWER', im}