implemented remu, rem, divu div and mul in RV32M

riscemu/instructions/RV32M.py

@@ -4,7 +4,11 @@ from ..helpers import int_from_bytes, int_to_bytes, to_unsigned, to_signed
 
 class RV32M(InstructionSet):
     def instruction_mul(self, ins: 'LoadedInstruction'):
-        INS_NOT_IMPLEMENTED(ins)
+        rd, rs1, rs2 = self.parse_rd_rs_rs(ins)
+        self.regs.set(
+            rd,
+            rs1 * rs2
+        )
 
     def instruction_mulh(self, ins: 'LoadedInstruction'):
         INS_NOT_IMPLEMENTED(ins)
@@ -16,13 +20,33 @@ class RV32M(InstructionSet):
         INS_NOT_IMPLEMENTED(ins)
 
     def instruction_div(self, ins: 'LoadedInstruction'):
-        INS_NOT_IMPLEMENTED(ins)
+        rd, rs1, rs2 = self.parse_rd_rs_rs(ins)
+        self.regs.set(
+            rd,
+            rs1 // rs2
+        )
 
     def instruction_divu(self, ins: 'LoadedInstruction'):
-        INS_NOT_IMPLEMENTED(ins)
+        rd, rs1, rs2 = self.parse_rd_rs_rs(ins)
+        rs1 = to_unsigned(rs1)
+        rs2 = to_unsigned(rs2)
+        self.regs.set(
+            rd,
+            rs1 // rs2
+        )
 
     def instruction_rem(self, ins: 'LoadedInstruction'):
-        INS_NOT_IMPLEMENTED(ins)
+        rd, rs1, rs2 = self.parse_rd_rs_rs(ins)
+        self.regs.set(
+            rd,
+            rs1 % rs2
+        )
 
     def instruction_remu(self, ins: 'LoadedInstruction'):
-        INS_NOT_IMPLEMENTED(ins)
+        rd, rs1, rs2 = self.parse_rd_rs_rs(ins)
+        rs1 = to_unsigned(rs1)
+        rs2 = to_unsigned(rs2)
+        self.regs.set(
+            rd,
+            rs1 % rs2
+        )