mirror of
https://github.com/notwa/lips
synced 2024-05-03 01:53:23 -07:00
implement and fix many pseudo-instructions
up until this commit, there was a bug that caused LI/LA to load wrong values for 0x8000 <= immediate <= 0xFFFF.
This commit is contained in:
parent
6e97d134e4
commit
cc5e673d0c
128
lips.lua
128
lips.lua
|
|
@ -368,16 +368,16 @@ local instructions = {
|
|||
BC1TL = {17, 'r', 'FCo', 3, 8},
|
||||
|
||||
-- pseudo-instructions
|
||||
B = {4, 'r', '00o'},
|
||||
BAL = {1, 'r', '0Co', 17},
|
||||
CL = {0, 'd', '00d0C', 32},
|
||||
MOV = {0, 'dt', '0td0C', 32},
|
||||
MOVE = {0, 'dt', '0td0C', 32},
|
||||
NEG = {0, 'ds', 's0d0C', 34},
|
||||
NOP = {0, '', '0'},
|
||||
NOT = {0, 'ds', 's0d0C', 39},
|
||||
SUBI = {8, 'tsk', 'sti'},
|
||||
SUBIU = {9, 'tsk', 'sti'},
|
||||
B = {4, 'r', '00o'}, -- BEQ R0, R0, offset
|
||||
BAL = {1, 'r', '0Co', 17}, -- BGEZAL R0, offset
|
||||
CL = {0, 'd', '00d0C', 32}, -- ADD RD, R0, R0
|
||||
MOV = {0, 'dt', '0td0C', 32}, -- ADD RD, R0, RT
|
||||
MOVE = {0, 'dt', '0td0C', 32}, -- ADD RD, R0, RT
|
||||
NEG = {0, 'dt', '0td0C', 34}, -- SUB RD, R0, RT
|
||||
NOP = {0, '', '0'}, -- SLL R0, R0, 0
|
||||
NOT = {0, 'ds', 's0d0C', 39}, -- NOR RD, RS, R0
|
||||
SUBI = {8, 'tsk', 'sti'}, -- ADDI RT, RS, -immediate
|
||||
SUBIU = {9, 'tsk', 'sti'}, -- ADDIU RT, RS, -immediate
|
||||
|
||||
-- ...that expand to multiple instructions
|
||||
LI = 'LI', -- only one instruction for values < 0x10000
|
||||
|
|
@ -388,11 +388,11 @@ local instructions = {
|
|||
--DIV = {}, -- 3 arguments
|
||||
REM = {}, -- 3 arguments
|
||||
|
||||
NAND = {},
|
||||
NANDI = {},
|
||||
NORI = {},
|
||||
ROL = {},
|
||||
ROR = {},
|
||||
NAND = 'NAND', -- AND, NOT
|
||||
NANDI = 'NANDI', -- ANDI, NOT
|
||||
NORI = 'NORI', -- ORI, NOT
|
||||
ROL = 'ROL', -- SLL, SRL, OR
|
||||
ROR = 'ROR', -- SRL, SLL, OR
|
||||
|
||||
SEQ = {},
|
||||
SEQI = {},
|
||||
|
|
@ -917,8 +917,8 @@ function Parser:instruction()
|
|||
self:error('undefined instruction')
|
||||
elseif h == 'LI' or h == 'LA' then
|
||||
local lui = instructions['LUI']
|
||||
local addi = instructions['ADDI']
|
||||
local ori = instructions['ORI']
|
||||
local addiu = instructions['ADDIU']
|
||||
local args = {}
|
||||
args.rt = self:register()
|
||||
self:optional_comma()
|
||||
|
|
@ -933,7 +933,8 @@ function Parser:instruction()
|
|||
self:error('use LI for immediates')
|
||||
end
|
||||
|
||||
if im[2] >= 0x10000 then
|
||||
im[2] = im[2] % 0x100000000
|
||||
if im[2] >= 0x8000 and im[2] <= 0xFFFF8000 then
|
||||
args.rs = args.rt
|
||||
args.immediate = {'UPPER', im}
|
||||
self:format_out(lui[3], lui[1], args, lui[4], lui[5])
|
||||
|
|
@ -944,8 +945,99 @@ function Parser:instruction()
|
|||
else
|
||||
args.rs = 'R0'
|
||||
args.immediate = {'LOWER', im}
|
||||
self:format_out(addi[3], addi[1], args, addi[4], addi[5])
|
||||
self:format_out(addiu[3], addiu[1], args, addiu[4], addiu[5])
|
||||
end
|
||||
elseif h == 'NAND' then
|
||||
local and_ = instructions['AND']
|
||||
local nor = instructions['NOR']
|
||||
local args = {}
|
||||
args.rd = self:register()
|
||||
self:optional_comma()
|
||||
args.rs = self:register()
|
||||
self:optional_comma()
|
||||
args.rt = self:register()
|
||||
self:format_out(and_[3], and_[1], args, and_[4], and_[5])
|
||||
args.rs = args.rd
|
||||
args.rt = 'R0'
|
||||
self:format_out(nor[3], nor[1], args, nor[4], nor[5])
|
||||
elseif h == 'NANDI' then
|
||||
local andi = instructions['ANDI']
|
||||
local nor = instructions['NOR']
|
||||
local args = {}
|
||||
args.rt = self:register()
|
||||
self:optional_comma()
|
||||
args.rs = self:register()
|
||||
self:optional_comma()
|
||||
args.immediate = self:const()
|
||||
self:format_out(andi[3], andi[1], args, andi[4], andi[5])
|
||||
args.rd = args.rt
|
||||
args.rs = args.rt
|
||||
args.rt = 'R0'
|
||||
self:format_out(nor[3], nor[1], args, nor[4], nor[5])
|
||||
elseif h == 'NORI' then
|
||||
local ori = instructions['ORI']
|
||||
local nor = instructions['NOR']
|
||||
local args = {}
|
||||
args.rt = self:register()
|
||||
self:optional_comma()
|
||||
args.rs = self:register()
|
||||
self:optional_comma()
|
||||
args.immediate = self:const()
|
||||
self:format_out(ori[3], ori[1], args, ori[4], ori[5])
|
||||
args.rd = args.rt
|
||||
args.rs = args.rt
|
||||
args.rt = 'R0'
|
||||
self:format_out(nor[3], nor[1], args, nor[4], nor[5])
|
||||
elseif h == 'ROL' then
|
||||
local sll = instructions['SLL']
|
||||
local srl = instructions['SRL']
|
||||
local or_ = instructions['OR']
|
||||
local args = {}
|
||||
local left = self:register()
|
||||
self:optional_comma()
|
||||
args.rt = self:register()
|
||||
self:optional_comma()
|
||||
args.immediate = self:const()
|
||||
args.rd = left
|
||||
if args.rd == 'AT' or args.rt == 'AT' then
|
||||
self:error('registers cannot be AT in a pseudo-instruction that uses AT')
|
||||
end
|
||||
if args.rd == args.rt and args.rd ~= 'R0' then
|
||||
self:error('registers cannot be the same')
|
||||
end
|
||||
self:format_out(sll[3], sll[1], args, sll[4], sll[5])
|
||||
args.rd = 'AT'
|
||||
args.immediate = {'NUM', 32 - args.immediate[2]}
|
||||
self:format_out(srl[3], srl[1], args, srl[4], srl[5])
|
||||
args.rd = left
|
||||
args.rs = left
|
||||
args.rt = 'AT'
|
||||
self:format_out(or_[3], or_[1], args, or_[4], or_[5])
|
||||
elseif h == 'ROR' then
|
||||
local sll = instructions['SLL']
|
||||
local srl = instructions['SRL']
|
||||
local or_ = instructions['OR']
|
||||
local args = {}
|
||||
local right = self:register()
|
||||
self:optional_comma()
|
||||
args.rt = self:register()
|
||||
self:optional_comma()
|
||||
args.immediate = self:const()
|
||||
args.rd = right
|
||||
if args.rt == 'AT' or args.rd == 'AT' then
|
||||
self:error('registers cannot be AT in a pseudo-instruction that uses AT')
|
||||
end
|
||||
if args.rd == args.rt and args.rd ~= 'R0' then
|
||||
self:error('registers cannot be the same')
|
||||
end
|
||||
self:format_out(srl[3], srl[1], args, srl[4], srl[5])
|
||||
args.rd = 'AT'
|
||||
args.immediate = {'NUM', 32 - args.immediate[2]}
|
||||
self:format_out(sll[3], sll[1], args, sll[4], sll[5])
|
||||
args.rd = right
|
||||
args.rs = right
|
||||
args.rt = 'AT'
|
||||
self:format_out(or_[3], or_[1], args, or_[4], or_[5])
|
||||
elseif name == 'JR' then
|
||||
local args = {}
|
||||
if self:is_EOL() then
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user