Add ecall and ebreak

1 files changed, 24 insertions, 0 deletions

diff --git a/pysc-v/InstructionSets/RV32I.py b/pysc-v/InstructionSets/RV32I.py
index 7f4a428..5992869 100644
--- a/pysc-v/InstructionSets/RV32I.py
+++ b/pysc-v/InstructionSets/RV32I.py
@@ -406,8 +406,32 @@ class and(R):
     funct3  = 0b111
     funct7  = 0b0000000
 
+@RV32I.instruction
+class ecall(I):
+    name    = "ecall"
+    opcode  = 0b1110011
+    funct3  = 0b000
+
+    def __init__(self):
+        # NOTE: ecall is a I-type instruction but doesn't get any arg and sets
+        # every field to 0
+        self.rd  = 0b00000
+        self.rs  = 0b00000
+        self.imm = 0b000000000000
 
 
+@RV32I.instruction
+class ebreak(I):
+    name    = "ebreak"
+    opcode  = 0b1110011
+    funct3  = 0b000
+
+    def __init__(self):
+        # NOTE: ebreak is a I-type instruction but doesn't get any arg and pre-
+        # -sets every field to a fixed value
+        self.rd  = 0b00000
+        self.rs  = 0b00000
+        self.imm = 0b000000000001