From 2faf57c08da1098b16591430940a07fa865b2e98 Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Tue, 25 Oct 2022 12:32:41 -0400
Subject: [PATCH] might as well add the link to the LLVM assembly code as well.

---
 library/compiler-builtins/src/riscv.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/compiler-builtins/src/riscv.rs b/library/compiler-builtins/src/riscv.rs
index eff249692ce3..ae361b33acfb 100644
--- a/library/compiler-builtins/src/riscv.rs
+++ b/library/compiler-builtins/src/riscv.rs
@@ -14,6 +14,9 @@ intrinsics! {
     //
     // for reference, see also implementation from gcc
     // https://raw.githubusercontent.com/gcc-mirror/gcc/master/libgcc/config/epiphany/mulsi3.c
+    //
+    // and from LLVM (in relatively readable RISC-V assembly):
+    // https://github.com/llvm/llvm-project/blob/main/compiler-rt/lib/builtins/riscv/int_mul_impl.inc
     pub extern "C" fn __mulsi3(a: u32, b: u32) -> u32 {
         let (mut a, mut b) = (a, b);
         let mut r = 0;