stage2: implement runtime `%` and `@rem`

1 files changed, 14 insertions, 0 deletions

diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index d7aa2d45b3..5d20e380b4 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -985,6 +985,7 @@ pub const FuncGen = struct {
                 .mul     => try self.airMul(inst, false),
                 .mulwrap => try self.airMul(inst, true),
                 .div     => try self.airDiv(inst),
+                .rem     => try self.airRem(inst),
                 .ptr_add => try self.airPtrAdd(inst),
                 .ptr_sub => try self.airPtrSub(inst),
 
@@ -1727,6 +1728,19 @@ pub const FuncGen = struct {
         return self.builder.buildUDiv(lhs, rhs, "");
     }
 
+    fn airRem(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {
+        if (self.liveness.isUnused(inst)) return null;
+
+        const bin_op = self.air.instructions.items(.data)[inst].bin_op;
+        const lhs = try self.resolveInst(bin_op.lhs);
+        const rhs = try self.resolveInst(bin_op.rhs);
+        const inst_ty = self.air.typeOfIndex(inst);
+
+        if (inst_ty.isFloat()) return self.builder.buildFRem(lhs, rhs, "");
+        if (inst_ty.isSignedInt()) return self.builder.buildSRem(lhs, rhs, "");
+        return self.builder.buildURem(lhs, rhs, "");
+    }
+
     fn airPtrAdd(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {
         if (self.liveness.isUnused(inst))
             return null;