Fixes sign extension in emit_product_quotient_remainder().

solana-labs · Aug 8, 2023 · ba2b4f0 · ba2b4f0
1 parent c0ebd95
commit ba2b4f0
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/src/jit.rs b/src/jit.rs
@@ -1221,10 +1221,12 @@ impl<'a, V: Verifier, C: ContextObject> JitCompiler<'a, V, C> {
         if dst != RDX {
             self.emit_ins(X86Instruction::push(RDX, None));
         }
-        if signed {
-            self.emit_ins(X86Instruction::sign_extend_rax_rdx(size));
-        } else if division {
-            self.emit_ins(X86Instruction::alu(size, 0x31, RDX, RDX, 0, None)); // RDX = 0
+        if division {
+            if signed {
+                self.emit_ins(X86Instruction::sign_extend_rax_rdx(size));
+            } else {
+                self.emit_ins(X86Instruction::alu(size, 0x31, RDX, RDX, 0, None)); // RDX = 0
+            }
         }
 
         self.emit_ins(X86Instruction::alu(size, 0xf7, 0x4 | (division as u8) << 1 | signed as u8, R11, 0, None));