implement comparisons

1 files changed, 8 insertions, 0 deletions

diff --git a/src/codegen.zig b/src/codegen.zig
index 7ade3fd..701a4e8 100644
--- a/src/codegen.zig
+++ b/src/codegen.zig
@@ -642,6 +642,14 @@ const Context = struct {
         switch (bin_op.op) {
             .add => try self.emit(.add(reg, lhs, rhs)),
             .sub => try self.emit(.sub(reg, lhs, rhs)),
+            .less_than => try self.emit(.sltu(reg, lhs, rhs)),
+            .greater_than => try self.emit(.sltu(reg, rhs, lhs)),
+            .less_or_equal, .greater_or_equal => {
+                const l, const r = if (bin_op.op == .less_or_equal) .{ lhs, rhs } else .{ rhs, lhs };
+
+                try self.emit(.sltu(reg, r, l));
+                try self.emit(.xori(reg, reg, 1));
+            },
         }
     }