Implement BGEU

2 files changed, 11 insertions, 0 deletions

diff --git a/src/instructions.rs b/src/instructions.rs
index c5519f8..271edd4 100644
--- a/src/instructions.rs
+++ b/src/instructions.rs
@@ -51,6 +51,7 @@ pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Option<Instr
             // BRANCH
             0b000 => Some(rvi::beq(core, instr)),
             0b001 => Some(rvi::bne(core, instr)),
+            0b111 => Some(rvi::bgeu(core, instr)),
             _ => None,
         },
         0b01101 => Some(rvi::lui(core, instr)),
diff --git a/src/instructions/rvi.rs b/src/instructions/rvi.rs
index ea1c40d..6f7dfd2 100644
--- a/src/instructions/rvi.rs
+++ b/src/instructions/rvi.rs
@@ -122,3 +122,13 @@ pub fn bne(core: &mut Core, instr: Instruction) -> InstructionResult {
 
     InstructionResult::Normal
 }
+
+pub fn bgeu(core: &mut Core, instr: Instruction) -> InstructionResult {
+    if core.reg_read(instr.rs1()) >= core.reg_read(instr.rs2()) {
+        core.pc = core.pc.wrapping_add(instr.imm_b());
+    } else {
+        core.advance_pc();
+    }
+
+    InstructionResult::Normal
+}