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MIPS/tools/decoder.py

152 lines
9.3 KiB
Python
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decode tools
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table = [
add control signals
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('000000000000000000000?????001111', 'SYNC'),
('00000000000???????????????000000', 'SLL'),
('00000000000???????????????000010', 'SRL'),
('00000000000???????????????000011', 'SRA'),
('000000???????????????00000000100', 'SLLV'),
('000000???????????????00000000110', 'SRLV'),
('000000???????????????00000000111', 'SRAV'),
('000000?????000000000000000001000', 'JR'),
('000000?????00000?????00000001001', 'JALR'),
('000000????????????????????001100', 'SYSCALL'),
('000000????????????????????001101', 'BREAK'),
('0000000000000000?????00000010000', 'MFHI'),
('000000?????000000000000000010001', 'MTHI'),
('0000000000000000?????00000010010', 'MFLO'),
('000000?????000000000000000010011', 'MTLO'),
decode tools
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('000000??????????0000000000011000', 'MULT'),
('000000??????????0000000000011001', 'MULTU'),
add control signals
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('000000??????????0000000000011010', 'DIV'),
('000000??????????0000000000011011', 'DIVU'),
('000000???????????????00000100000', 'ADD'),
('000000???????????????00000100001', 'ADDU'),
('000000???????????????00000100010', 'SUB'),
('000000???????????????00000100011', 'SUBU'),
('000000???????????????00000100100', 'AND'),
('000000???????????????00000100101', 'OR'),
('000000???????????????00000100110', 'XOR'),
('000000???????????????00000100111', 'NOR'),
('000000???????????????00000101010', 'SLT'),
('000000???????????????00000101011', 'SLTU'),
('000001?????00000????????????????', 'BLTZ'),
('000001?????10000????????????????', 'BLTZAL'),
('000001?????00001????????????????', 'BGEZ'),
('000001?????10001????????????????', 'BGEZAL'),
('000010??????????????????????????', 'J'),
('000011??????????????????????????', 'JAL'),
('000100??????????????????????????', 'BEQ'),
('000101??????????????????????????', 'BNE'),
('000110?????00000????????????????', 'BLEZ'),
('000111?????00000????????????????', 'BGTZ'),
('001000??????????????????????????', 'ADDI'),
('001001??????????????????????????', 'ADDIU'),
('001010??????????????????????????', 'SLTI'),
('001011??????????????????????????', 'SLTIU'),
('001100??????????????????????????', 'ANDI'),
('001101??????????????????????????', 'ORI'),
('001110??????????????????????????', 'XORI'),
('00111100000?????????????????????', 'LUI'),
('01000000000??????????00000000???', 'MFC0'),
('01000000100??????????00000000???', 'MTC0'),
('01000010000000000000000000000001', 'TLBR'),
('01000010000000000000000000000010', 'TLBWI'),
('01000010000000000000000000000110', 'TLBWR'),
('01000010000000000000000000001000', 'TLBP'),
('01000010000000000000000000011000', 'ERET'),
add control signals
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('011100??????????0000000000000000', 'MADD'),
('011100??????????0000000000000001', 'MADDU'),
('011100??????????0000000000000100', 'MSUB'),
('011100??????????0000000000000101', 'MSUBU'),
add control signals
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('011100???????????????00000000010', 'MUL'),
('100000??????????????????????????', 'LB'),
('100001??????????????????????????', 'LH'),
('100010??????????????????????????', 'LWL'),
('100011??????????????????????????', 'LW'),
('100100??????????????????????????', 'LBU'),
('100101??????????????????????????', 'LHU'),
('100110??????????????????????????', 'LWR'),
('101000??????????????????????????', 'SB'),
('101001??????????????????????????', 'SH'),
('101010??????????????????????????', 'SWL'),
('101011??????????????????????????', 'SW'),
('101110??????????????????????????', 'SWR'),
('101111??????????????????????????', 'CACHE'),
('110011??????????????????????????', 'PREF'),
decode tools
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]
class Boolean:
def __init__(self, x):
self.x = {'0': -1, '?': 0, '1': 1}.get(x, x)
def __and__(self, other):
return Boolean(min(self.x, other.x))
def __or__(self, other):
return Boolean(max(self.x, other.x))
def __invert__(self):
return Boolean(-self.x)
def __repr__(self):
return {-1: '0', 0: 'x', 1: '1'}[self.x]
for inst, name in table:
inst = list(Boolean(x) for x in inst[::-1])
update control signals for swl/swr
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print('=====', name, '=====')
RW & RS0 fix tools update
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ctrl = {}
add LWL and LWR
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ctrl['BJRJ'] = (~inst[27] & (~inst[31] & ~inst[30] & ~inst[29] & ~inst[28] & ~inst[5] & ~inst[4] & inst[3] & ~inst[2] | ~inst[31] & ~inst[29] & inst[28]) | inst[27] & ~inst[31] & ~inst[29]) & ~inst[26] | ~inst[31] & ~inst[29] & inst[26]
add sync pref as nop
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ctrl['B'] = ~inst[31] & ~inst[29] & (inst[28] | ~inst[27] & inst[26])
ctrl['JR'] = ~inst[31] & ~inst[30] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & ~inst[5] & ~inst[4] & inst[3] & ~inst[2]
ctrl['J'] = ~inst[31] & ~inst[29] & ~inst[28] & inst[27]
RW & RS0 fix tools update
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add sync pref as nop
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ctrl['PRV'] = ~inst[31] & inst[30] & ~inst[29]
add LWL and LWR
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RW & RS0 fix tools update
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ctrl['SYSCALL'] = ~inst[31] & ~inst[30] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & inst[3] & inst[2] & ~inst[0]
add sync pref as nop
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ctrl['BREAK'] = ~inst[31] & ~inst[30] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & inst[3] & inst[2] & ~inst[1] & inst[0]
ctrl['ERET'] = ~inst[31] & inst[30] & inst[4]
ctrl['OFA'] = ~inst[31] & ~inst[28] & ~inst[27] & ~inst[26] & (~inst[30] & inst[5] & ~inst[3] & ~inst[2] & ~inst[0] | inst[29])
RW & RS0 fix tools update
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add sync pref as nop
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ctrl['ES'] = (~inst[30] & (~inst[28] & ~inst[27] & ~inst[26] & ((inst[4] & inst[3] & ~inst[2] | ~inst[3] & inst[2]) | inst[5]) | inst[31]) | inst[29])
ctrl['ET'] = ~inst[27] & ~inst[26] & (~inst[31] & ~inst[30] & ~inst[29] & ~inst[28] & (~inst[1] & (~inst[0] & (~inst[3] & ~inst[4] | inst[3] & inst[4]) | inst[4] & inst[3] & inst[0]) | inst[1] & (~inst[4] | inst[3]) | inst[5]) | inst[30] & inst[29])
ctrl['DS'] = ~inst[26] & (~inst[31] & ~inst[30] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[5] & ~inst[4] & inst[3] & ~inst[2] | ~inst[31] & ~inst[29] & inst[28]) | ~inst[31] & ~inst[29] & (inst[28] | ~inst[27]) & inst[26]
RW & RS0 fix tools update
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ctrl['DT'] = ~inst[31] & ~inst[29] & inst[28] & ~inst[27]
add sync pref as nop
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ctrl['DP0'] = ~inst[31] & (~inst[30] | inst[29] | ~inst[25] | inst[4]) | inst[31] & inst[30]
RW & RS0 fix tools update
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ctrl['DP1'] = inst[26] | (~inst[30] & (inst[31] | inst[29] | inst[28] | inst[27] | ~inst[4]) | inst[30] & (~inst[29] & inst[25] | inst[3]))
ctrl['ECtrl_OP_f_sl'] = ~inst[31] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & ~inst[5] & ~inst[3] & ~inst[1]
ctrl['ECtrl_OP_f_sr'] = ~inst[31] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & ~inst[5] & inst[1]
ctrl['ECtrl_OP_f_add'] = inst[31] | ~inst[28] & (~inst[26] & ~inst[27] & (inst[29] | ~inst[5] & inst[3] & ~inst[1] | inst[5] & ~inst[3] & ~inst[2]) | inst[26] & (~inst[29] | ~inst[27]))
ctrl['ECtrl_OP_f_and'] = ~inst[31] & (~inst[28] & ~inst[29] & ~inst[27] & ~inst[26] & inst[5] & inst[2] & ~inst[0] & ~inst[1] | inst[28] & ~inst[27] & ~inst[26])
ctrl['ECtrl_OP_f_or'] = ~inst[31] & (~inst[28] & ~inst[29] & ~inst[27] & ~inst[26] & inst[5] & inst[2] & inst[0] | inst[28] & ~inst[27] & inst[26])
ctrl['ECtrl_OP_f_xor'] = ~inst[31] & (~inst[28] & ~inst[29] & ~inst[27] & ~inst[26] & inst[5] & inst[2] & ~inst[0] & inst[1] | inst[28] & inst[27])
ctrl['ECtrl_OP_f_slt'] = ~inst[31] & ~inst[28] & ~inst[26] & (~inst[29] & inst[5] & inst[3] & ~inst[2] & ~inst[0] | inst[27])
ctrl['ECtrl_OP_f_sltu'] = ~inst[31] & ~inst[28] & (~inst[26] & ~inst[29] & ~inst[27] & inst[5] & inst[3] & ~inst[2] & inst[0] | inst[26] & inst[29] & inst[27])
ctrl['ECtrl_OP_alt'] = ~inst[31] & (~inst[26] & (~inst[29] & inst[1] & (inst[5] | inst[0]) | inst[27]) | inst[26] & inst[29] & inst[27])
ctrl['ECtrl_SA'] = (inst[31] | inst[29] | ~inst[26] & (inst[5] | inst[2]), inst[31] | (~inst[28] & (inst[29] | inst[26] | inst[5] | inst[3] | inst[2]) | inst[28] & (~inst[27] | ~inst[26])))
ctrl['ECtrl_SB'] = (inst[31] | inst[29], inst[26] | ~inst[5] & inst[3])
add control signals
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ctrl['imm'] = (~inst[31] & inst[28] & inst[27] & inst[26], inst[31] | ~inst[28])
RW & RS0 fix tools update
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add control signals
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ctrl['MCtrl0_HW'] = ~inst[30] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & inst[4] & (~inst[1] & inst[0] | inst[3]) | inst[30] & inst[29] & ~inst[1]
ctrl['MCtrl0_LW'] = ~inst[30] & ~inst[29] & ~inst[28] & ~inst[27] & ~inst[26] & inst[4] & (inst[1] & inst[0] | inst[3]) | inst[30] & inst[29] & ~inst[1]
RW & RS0 fix tools update
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ctrl['MCtrl0_HLS'] = (~inst[27] & ~inst[26] & (~inst[30] & ~inst[31] & ~inst[29] & ~inst[28] & inst[4] & inst[3] | inst[30] & inst[29]), ~inst[30] & inst[1], inst[0])
fix bug in decode
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ctrl['MCtrl0_MAS'] = (inst[2], inst[30] & ~inst[2] & ~inst[1])
add sync pref as nop
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ctrl['MCtrl0_C0W'] = ~inst[31] & inst[30] & ~inst[29] & inst[23] & ~inst[3]
RW & RS0 fix tools update
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ctrl['MCtrl0_RS0'] = (ctrl['DP1'], inst[30], ~inst[29] & (inst[30] | ~inst[1]))
add control signals
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ctrl['MCtrl1_MR'] = inst[31] & ~inst[30]
ctrl['MCtrl1_MWR'] = inst[29]
ctrl['MCtrl1_MX'] = ~inst[28]
ctrl['MCtrl1_ALR'] = (inst[28] & inst[27] & ~inst[26], inst[27] & ~inst[26])
ctrl['MCtrl1_TLBR'] = ~inst[31] & inst[30] & ~inst[29] & inst[25] & ~inst[3] & ~inst[1]
ctrl['MCtrl1_TLBWI'] = ~inst[31] & inst[30] & ~inst[29] & inst[25] & ~inst[3] & inst[1]
ctrl['MCtrl1_TLBWR'] = ~inst[31] & inst[30] & ~inst[29] & inst[25] & ~inst[3] & (inst[2] | ~inst[1])
ctrl['MCtrl1_TLBP'] = ~inst[31] & inst[30] & ~inst[4] & inst[3]
ctrl['MCtrl1_CACHE_OP'] = (inst[29] & inst[28] & inst[26] & inst[16], inst[29] & inst[28] & inst[26] & ~inst[20], inst[29] & inst[28] & inst[26] & ~inst[18] & (inst[20] | inst[19] | ~inst[16]))
RW & RS0 fix tools update
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add control signals
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ctrl['WCtrl_RW'] = ~inst[30] & (~inst[27] & (~inst[26] & (~inst[31] & (~inst[28] & (~inst[3] & (~inst[4] | ~inst[0]) | inst[3] & (~inst[4] & ~inst[2] & inst[0] | inst[5])) | inst[29]) | inst[31] & ~inst[29]) | inst[26] & (~inst[31] & (~inst[28] & inst[20] | inst[29]) | inst[31] & ~inst[29])) | inst[27] & (~inst[26] & (~inst[31] & inst[29] | inst[31] & ~inst[29]) | inst[26] & (~inst[31] & (~inst[28] | inst[29]) | inst[31] & ~inst[29]))) | inst[30] & ~inst[31] & ~inst[3] & (~inst[29] & ~inst[25] & ~inst[23] | inst[29] & inst[1])
add sync pref as nop
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ctrl['RD'] = (~inst[29] & inst[30] | inst[29] & ~inst[30] | inst[31], inst[26])
RW & RS0 fix tools update
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print(ctrl)
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