still compiling after refactoring field types
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Yehowshua Immanuel
parent
73d5e1204c
commit
3f50fe32f8
5 changed files with 95 additions and 74 deletions
89
hs/Decode.hs
89
hs/Decode.hs
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@ -1,7 +1,7 @@
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE NumericUnderscores #-}
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module Decode(decode) where
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module Decode(decode, DecodeResult) where
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import DecodeTypes(
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RTypeFields(..), ITypeFields(..), STypeFields(..),
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@ -12,6 +12,7 @@ import Clash.Prelude
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import Fetch(FetchResult (Instruction, InstructionException))
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import Exceptions(Exception(..))
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import Types(Insn)
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import RegFiles(RegVal(..))
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import Util((|>))
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data DecodeResult = Opcode Opcode
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@ -47,19 +48,19 @@ decodeRType insn =
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0b0110011 ->
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case funct3 of
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0x00 -> case funct7 of
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0x00 -> Just |> ADD (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x20 -> Just |> SUB (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x00 -> Just |> ADD (RTypeFields rd funct3 rs1 rs2 funct7)
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0x20 -> Just |> SUB (RTypeFields rd funct3 rs1 rs2 funct7)
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_ -> Nothing
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0x04 -> Just |> XOR (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x06 -> Just |> OR (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x07 -> Just |> AND (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x01 -> Just |> SLL (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x04 -> Just |> XOR (RTypeFields rd funct3 rs1 rs2 funct7)
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0x06 -> Just |> OR (RTypeFields rd funct3 rs1 rs2 funct7)
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0x07 -> Just |> AND (RTypeFields rd funct3 rs1 rs2 funct7)
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0x01 -> Just |> SLL (RTypeFields rd funct3 rs1 rs2 funct7)
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0x05 -> case funct7 of
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0x00 -> Just |> SRL (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x20 -> Just |> SRA (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x00 -> Just |> SRL (RTypeFields rd funct3 rs1 rs2 funct7)
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0x20 -> Just |> SRA (RTypeFields rd funct3 rs1 rs2 funct7)
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_ -> Nothing
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0x02 -> Just |> SLT (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x03 -> Just |> SLTU (RTypeFields opcode rd funct3 rs1 rs2 funct7)
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0x02 -> Just |> SLT (RTypeFields rd funct3 rs1 rs2 funct7)
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0x03 -> Just |> SLTU (RTypeFields rd funct3 rs1 rs2 funct7)
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_ -> Nothing
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_ -> Nothing
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where
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@ -73,36 +74,36 @@ decodeRType insn =
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decodeIType :: Insn -> Maybe Opcode
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decodeIType insn = case opcode of
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0b0010011 -> case funct3 of
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0x0 -> Just |> ADDI (ITypeFields opcode rd funct3 rs1 imm)
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0x4 -> Just |> XORI (ITypeFields opcode rd funct3 rs1 imm)
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0x6 -> Just |> ORI (ITypeFields opcode rd funct3 rs1 imm)
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0x7 -> Just |> ANDI (ITypeFields opcode rd funct3 rs1 imm)
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0x0 -> Just |> ADDI (ITypeFields rd funct3 rs1 imm)
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0x4 -> Just |> XORI (ITypeFields rd funct3 rs1 imm)
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0x6 -> Just |> ORI (ITypeFields rd funct3 rs1 imm)
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0x7 -> Just |> ANDI (ITypeFields rd funct3 rs1 imm)
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0x1 -> if slice d31 d25 (pack insn) == 0
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then Just |> SLLI (ITypeFields opcode rd funct3 rs1 imm)
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then Just |> SLLI (ITypeFields rd funct3 rs1 imm)
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else Nothing
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0x5 -> case slice d31 d25 (pack insn) of -- Distinguish SRLI and SRAI
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0x00 -> Just |> SRLI (ITypeFields opcode rd funct3 rs1 imm)
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0x20 -> Just |> SRAI (ITypeFields opcode rd funct3 rs1 imm)
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0x00 -> Just |> SRLI (ITypeFields rd funct3 rs1 imm)
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0x20 -> Just |> SRAI (ITypeFields rd funct3 rs1 imm)
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_ -> Nothing
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0x2 -> Just |> SLTI (ITypeFields opcode rd funct3 rs1 imm)
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0x3 -> Just |> SLTIU (ITypeFields opcode rd funct3 rs1 imm)
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0x2 -> Just |> SLTI (ITypeFields rd funct3 rs1 imm)
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0x3 -> Just |> SLTIU (ITypeFields rd funct3 rs1 imm)
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_ -> Nothing
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0b0000011 -> case funct3 of
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0x0 -> Just |> LB (ITypeFields opcode rd funct3 rs1 imm)
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0x1 -> Just |> LH (ITypeFields opcode rd funct3 rs1 imm)
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0x2 -> Just |> LW (ITypeFields opcode rd funct3 rs1 imm)
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0x4 -> Just |> LBU (ITypeFields opcode rd funct3 rs1 imm)
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0x5 -> Just |> LHU (ITypeFields opcode rd funct3 rs1 imm)
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0x0 -> Just |> LB (ITypeFields rd funct3 rs1 imm)
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0x1 -> Just |> LH (ITypeFields rd funct3 rs1 imm)
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0x2 -> Just |> LW (ITypeFields rd funct3 rs1 imm)
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0x4 -> Just |> LBU (ITypeFields rd funct3 rs1 imm)
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0x5 -> Just |> LHU (ITypeFields rd funct3 rs1 imm)
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_ -> Nothing
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0b1100111 -> case funct3 of
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0x0 -> Just |> JALR (ITypeFields opcode rd funct3 rs1 imm)
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0x0 -> Just |> JALR (ITypeFields rd funct3 rs1 imm)
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_ -> Nothing
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0b1110011 -> case imm of
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0x000 -> Just |> ECALL (ITypeFields opcode rd funct3 rs1 imm)
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0x001 -> Just |> EBREAK (ITypeFields opcode rd funct3 rs1 imm)
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0x000 -> Just |> ECALL (ITypeFields rd funct3 rs1 imm)
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0x001 -> Just |> EBREAK (ITypeFields rd funct3 rs1 imm)
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_ -> Nothing
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_ -> Nothing
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@ -117,9 +118,9 @@ decodeSType :: Insn -> Maybe Opcode
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decodeSType insn =
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case opcode of
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0b0100011 -> case funct3 of
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0x0 -> Just |> SB (STypeFields opcode funct3 rs1 rs2 imm12) -- Store Byte
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0x1 -> Just |> SH (STypeFields opcode funct3 rs1 rs2 imm12) -- Store Halfword
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0x2 -> Just |> SW (STypeFields opcode funct3 rs1 rs2 imm12) -- Store Word
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0x0 -> Just |> SB (STypeFields funct3 rs1 rs2 imm12) -- Store Byte
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0x1 -> Just |> SH (STypeFields funct3 rs1 rs2 imm12) -- Store Halfword
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0x2 -> Just |> SW (STypeFields funct3 rs1 rs2 imm12) -- Store Word
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_ -> Nothing
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_ -> Nothing
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where
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@ -133,12 +134,12 @@ decodeBType :: Insn -> Maybe Opcode
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decodeBType insn =
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case opcode of
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0b1100011 -> case funct3 of
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0x0 -> Just |> BEQ (BTypeFields opcode funct3 rs1 rs2 imm13) -- Branch if equal
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0x1 -> Just |> BNE (BTypeFields opcode funct3 rs1 rs2 imm13) -- Branch if not equal
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0x4 -> Just |> BLT (BTypeFields opcode funct3 rs1 rs2 imm13) -- Branch if less than
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0x5 -> Just |> BGE (BTypeFields opcode funct3 rs1 rs2 imm13) -- Branch if greater or equal
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0x6 -> Just |> BLTU (BTypeFields opcode funct3 rs1 rs2 imm13) -- Branch if less than (unsigned)
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0x7 -> Just |> BGEU (BTypeFields opcode funct3 rs1 rs2 imm13) -- Branch if greater or equal (unsigned)
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0x0 -> Just |> BEQ (BTypeFields funct3 rs1 rs2 imm13) -- Branch if equal
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0x1 -> Just |> BNE (BTypeFields funct3 rs1 rs2 imm13) -- Branch if not equal
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0x4 -> Just |> BLT (BTypeFields funct3 rs1 rs2 imm13) -- Branch if less than
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0x5 -> Just |> BGE (BTypeFields funct3 rs1 rs2 imm13) -- Branch if greater or equal
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0x6 -> Just |> BLTU (BTypeFields funct3 rs1 rs2 imm13) -- Branch if less than (unsigned)
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0x7 -> Just |> BGEU (BTypeFields funct3 rs1 rs2 imm13) -- Branch if greater or equal (unsigned)
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_ -> Nothing
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_ -> Nothing
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where
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@ -150,8 +151,8 @@ decodeBType insn =
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decodeUType :: Insn -> Maybe Opcode
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decodeUType insn = case opcode of
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0b0110111 -> Just |> LUI (UTypeFields opcode rd imm20) -- LUI
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0b0010111 -> Just |> AUIPC (UTypeFields opcode rd imm20) -- AUIPC
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0b0110111 -> Just |> LUI (UTypeFields rd imm20) -- LUI
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0b0010111 -> Just |> AUIPC (UTypeFields rd imm20) -- AUIPC
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_ -> Nothing
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where
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opcode = getOpcode insn
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@ -161,7 +162,7 @@ decodeUType insn = case opcode of
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decodeJType :: Insn -> Maybe Opcode
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decodeJType insn =
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case opcode of
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0b1101111 -> Just |> JAL (JTypeFields opcode rd imm21) -- JAL
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0b1101111 -> Just |> JAL (JTypeFields rd imm21) -- JAL
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_ -> Nothing
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where
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opcode = getOpcode insn
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@ -210,8 +211,8 @@ getFunct7 instr = bitCoerce |> slice d31 d25 (pack instr)
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getRd :: Insn -> Unsigned 5
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getRd instr = bitCoerce |> slice d11 d7 (pack instr)
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getRs2 :: Insn -> Unsigned 5
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getRs2 instr = bitCoerce |> slice d24 d20 (pack instr)
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getRs2 :: Insn -> RegVal
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getRs2 instr = Unpopulated |> bitCoerce |> slice d24 d20 (pack instr)
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getRs1 :: Insn -> Unsigned 5
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getRs1 instr = bitCoerce |> slice d19 d15 (pack instr)
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getRs1 :: Insn -> RegVal
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getRs1 instr = Unpopulated |> bitCoerce |> slice d19 d15 (pack instr)
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