15 files changed, 140 insertions, 145 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bee8a64
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
diff --git a/instructions.py b/instructions.py
deleted file mode 100644
index 0bfda4c..0000000
--- a/instructions.py
+++ /dev/null
@@ -1,145 +0,0 @@
-# Full list of instructions
-"""
-U lui
-U auipc
-J jal
-I jalr
-B beq
-B bne
-B blt
-B bge
-B bltu
-B bgeu
-I lb
-I lh
-I lw
-I lbu
-I lhu
-S sb
-S sh
-S sw
-I addi
-I slti
-I sltiu
-I xori
-I ori
-I andi
-I slli
-I srli
-I srai
-R add
-R sub
-R sll
-R slt
-R sltu
-R xor
-R srl
-R sra
-R or
-R and
-I fence
-I fence.i
-I ecall
-I ebreak
-I csrrw
-I csrrs
-I csrrc
-I csrrwi
-I csrrsi
-I csrrci
-"""
-
-
-from ctypes import c_uint32
-
-class Instruction:
-
-    self.memory = None
-    self.regs   = None
-
-    def __init__(self):
-        pass
-
-    def compile(self):
-        # return the binstream of the instruction in a c_uint32
-        pass
-
-    def execute(self):
-        # executes the instruction and returns the next program counter
-        return
-
-class R(Instruction):
-    funct3  = None
-    funct7  = None
-    opcode = None
-    def __init__(self, rd, rs1, rs2):
-        self.rd  = rd
-        self.rs1 = rs1
-        self.rs2 = rs2
-
-    def compile(self):
-        # TODO: ensure sizes and convert register names to number...
-        return c_uint32(
-            (self.funct7  << 25) +\
-            (self.rs2    << 20) +\
-            (self.rs1    << 15) +\
-            (self.funct3  << 12) +\
-            (self.rd     <<  7) +\
-            self.opcode
-        )
-
-class I(Instruction):
-    funct3 = None
-    opcode = None
-
-    def __init__(self, rd, rs, imm):
-        self.rd = rd
-        self.rs = rs
-        self.imm = imm
-
-    def compile(self):
-        return c_uint32(
-            (self.imm   << 20) +\
-            (self.rs    << 15) +\
-            (self.funct3 << 12) +\
-            (self.rd    <<  7) +\
-            self.opcode
-        )
-
-class S(Instruction):
-    pass
-
-class B(Instruction):
-    pass
-
-class U(Instruction):
-    pass
-
-class J(Instruction):
-    pass
-
-
-
-class add(R):
-    name   = "add"
-    opcode = 0b0110011
-    funct3  = 0b000
-    funct7  = 0b0000000
-
-    def execute(self):
-        pass
-
-
-class addi(I):
-    name   = "addi"
-    opcode = 0b0010011
-    funct3  = 0b000
-
-    def execute(self):
-        pass
-
-if __name__ == "__main__":
-    r = Regs()
-    # This is the interface i'd love to have
-    addins = add("x5","x2","zero")
-    j("labelName")
diff --git a/pysc-v/Frontend/__init__.py b/pysc-v/Frontend/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/pysc-v/Frontend/__init__.py
diff --git a/pysc-v/Frontend/lexer.py b/pysc-v/Frontend/lexer.py
new file mode 100644
index 0000000..5175097
--- /dev/null
+++ b/pysc-v/Frontend/lexer.py
@@ -0,0 +1,4 @@
+# Returns:
+# - label
+# - instruction (with args)
+# - directive   (with args)
diff --git a/reader.py b/pysc-v/Frontend/reader.py
index 45d155c..45d155c 100644
--- a/reader.py
+++ b/pysc-v/Frontend/reader.py
diff --git a/pysc-v/InstructionSets/RV32C.py b/pysc-v/InstructionSets/RV32C.py
new file mode 100644
index 0000000..e740ac4
--- /dev/null
+++ b/pysc-v/InstructionSets/RV32C.py
@@ -0,0 +1,29 @@
+from instructions import Instruction, InstructionSet
+
+class Compressed(Instruction):
+    size = 2
+
+
+class CR(Compressed):
+    pass
+
+class CI(Compressed):
+    pass
+
+class CSS(Compressed):
+    pass
+
+class CIW(Compressed):
+    pass
+
+class CJ(Compressed):
+    pass
+
+class CB(Compressed):
+    pass
+
+class CL(Compressed):
+    pass
+
+class CS(Compressed):
+    pass
diff --git a/pysc-v/InstructionSets/RV32D.py b/pysc-v/InstructionSets/RV32D.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/pysc-v/InstructionSets/RV32D.py
diff --git a/pysc-v/InstructionSets/RV32F.py b/pysc-v/InstructionSets/RV32F.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/pysc-v/InstructionSets/RV32F.py
diff --git a/pysc-v/InstructionSets/RV32I.py b/pysc-v/InstructionSets/RV32I.py
new file mode 100644
index 0000000..967b24d
--- /dev/null
+++ b/pysc-v/InstructionSets/RV32I.py
@@ -0,0 +1,71 @@
+from instructions import Instruction, InstructionSet
+
+RV32I = InstructionSet()
+
+class R(Instruction):
+    funct3  = None
+    funct7  = None
+    opcode  = None
+    def __init__(self, rd, rs1, rs2):
+        self.rd  = rd
+        self.rs1 = rs1
+        self.rs2 = rs2
+
+    def compile(self):
+        # TODO: ensure sizes and convert register names to number...
+        return c_uint32(
+            (self.funct7  << 25) +\
+            (self.rs2     << 20) +\
+            (self.rs1     << 15) +\
+            (self.funct3  << 12) +\
+            (self.rd      <<  7) +\
+            self.opcode
+        )
+
+class I(Instruction):
+    funct3 = None
+    opcode = None
+
+    def __init__(self, rd, rs, imm):
+        self.rd = rd
+        self.rs = rs
+        self.imm = imm
+
+    def compile(self):
+        return c_uint32(
+            (self.imm    << 20) +\
+            (self.rs     << 15) +\
+            (self.funct3 << 12) +\
+            (self.rd     <<  7) +\
+            self.opcode
+        )
+
+class S(Instruction):
+    pass
+
+class B(Instruction):
+    pass
+
+class U(Instruction):
+    pass
+
+class J(Instruction):
+    pass
+
+
+class add(R):
+    name    = "add"
+    opcode  = 0b0110011
+    funct3  = 0b000
+    funct7  = 0b0000000
+
+    def execute(self):
+        return pc + self.size
+
+class addi(I):
+    name    = "addi"
+    opcode  = 0b0010011
+    funct3  = 0b000
+
+    def execute(self):
+        pass
diff --git a/pysc-v/InstructionSets/__init__.py b/pysc-v/InstructionSets/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/pysc-v/InstructionSets/__init__.py
diff --git a/pysc-v/InstructionSets/instructions.py b/pysc-v/InstructionSets/instructions.py
new file mode 100644
index 0000000..5587f2e
--- /dev/null
+++ b/pysc-v/InstructionSets/instructions.py
@@ -0,0 +1,30 @@
+from ctypes import c_uint32
+
+
+class Instruction:
+    size = 4  # Instruction size in bytes
+
+    def __init__(self):
+        pass
+
+    def compile(self):
+        # return the binstream of the instruction in a c_uint32
+        pass
+
+    def execute(self):
+        # executes the instruction and returns the next program counter
+        return
+
+class InstructionSet:
+    def __init__(self, init=None):
+        self.data = dict()
+
+    def add_instruction(self, ins):
+        if ins.name not in self.data:
+            self.data[ins.name] = ins
+
+
+if __name__ == "__main__":
+    # TODO This is the interface i'd love to have
+    addins = add("x5","x2","zero")
+    j("labelName")
diff --git a/pysc-v/main.py b/pysc-v/main.py
new file mode 100644
index 0000000..2d6f6a5
--- /dev/null
+++ b/pysc-v/main.py
@@ -0,0 +1,5 @@
+# Use a generator for the execution flow
+# -> PC has to be a global variable, updated by each instruction to the next val
+# So user can set the PC by hand and call next(run) and make the code jump!
+
+
diff --git a/memory.py b/pysc-v/memory.py
index 84bf0bd..84bf0bd 100644
--- a/memory.py
+++ b/pysc-v/memory.py
diff --git a/registersRV32I.py b/pysc-v/registers/RV32I.py
index 4652bca..4652bca 100644
--- a/registersRV32I.py
+++ b/pysc-v/registers/RV32I.py
diff --git a/pysc-v/registers/__init__.py b/pysc-v/registers/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/pysc-v/registers/__init__.py