From 5d4aa97cd546448ceb36115cc7efb5b604b8bf85 Mon Sep 17 00:00:00 2001
From: Rerumu <rerumu@protonmail.com>
Date: Sun, 26 Jun 2022 01:51:52 -0400
Subject: [PATCH] Fix signed `i32` remainder

---
 codegen/luau/runtime/runtime.lua       | 12 ++++++++++++
 codegen/luau/src/analyzer/as_symbol.rs |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/codegen/luau/runtime/runtime.lua b/codegen/luau/runtime/runtime.lua
index ce624d7..528b398 100644
--- a/codegen/luau/runtime/runtime.lua
+++ b/codegen/luau/runtime/runtime.lua
@@ -43,6 +43,7 @@ do
 	local sub = {}
 	local mul = {}
 	local div = {}
+	local rem = {}
 	local neg = {}
 	local min = {}
 	local max = {}
@@ -52,6 +53,7 @@ do
 	local assert = assert
 
 	local math_abs = math.abs
+	local math_fmod = math.fmod
 	local math_floor = math.floor
 	local math_round = math.round
 	local math_sign = math.sign
@@ -110,6 +112,15 @@ do
 
 	div.u64 = I64.divide_unsigned
 
+	function rem.i32(lhs, rhs)
+		assert(rhs ~= 0, "division by zero")
+
+		lhs = to_i32(lhs)
+		rhs = to_i32(rhs)
+
+		return to_u32(math_fmod(lhs, rhs))
+	end
+
 	function neg.f32(num)
 		return -num
 	end
@@ -161,6 +172,7 @@ do
 	module.sub = sub
 	module.mul = mul
 	module.div = div
+	module.rem = rem
 	module.neg = neg
 	module.min = min
 	module.max = max
diff --git a/codegen/luau/src/analyzer/as_symbol.rs b/codegen/luau/src/analyzer/as_symbol.rs
index a48f6d5..c19ebfc 100644
--- a/codegen/luau/src/analyzer/as_symbol.rs
+++ b/codegen/luau/src/analyzer/as_symbol.rs
@@ -11,7 +11,7 @@ impl AsSymbol for BinOpType {
 			Self::Sub_F32 | Self::Sub_F64 => "-",
 			Self::Mul_F32 | Self::Mul_F64 => "*",
 			Self::Div_F32 | Self::Div_F64 => "/",
-			Self::RemS_I32 | Self::RemU_I32 => "%",
+			Self::RemU_I32 => "%",
 			_ => return None,
 		};