From 9ba9d2432c6c8594b5d172766bcac3b0fe6df456 Mon Sep 17 00:00:00 2001
From: Eyck-Alexander Jentzsch <alex@minres.com>
Date: Mon, 17 Feb 2025 15:19:56 +0100
Subject: [PATCH] adds Vector Widening Integer Multiply Instructions

---
 src/vm/vector_functions.hpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/vm/vector_functions.hpp b/src/vm/vector_functions.hpp
index c82462d..d00624c 100644
--- a/src/vm/vector_functions.hpp
+++ b/src/vm/vector_functions.hpp
@@ -270,9 +270,20 @@ std::function<dest_elem_t(src2_elem_t, src1_elem_t)> get_funct(unsigned funct6,
                 return static_cast<std::make_signed_t<dest_elem_t>>(static_cast<std::make_signed_t<src2_elem_t>>(vs2) -
                                                                     static_cast<std::make_signed_t<src1_elem_t>>(vs1));
             };
-            // case 0b111000: // VWMULU
-            // case 0b111010: // VWMULSU
-            // case 0b111011: // VWMUL
+        case 0b111000: // VWMULU
+            return [](src2_elem_t vs2, src1_elem_t vs1) {
+                return (static_cast<twice_t<src2_elem_t>>(vs2) * static_cast<twice_t<src2_elem_t>>(vs1));
+            };
+        case 0b111010: // VWMULSU
+            return [](src2_elem_t vs2, src1_elem_t vs1) {
+                return (static_cast<twice_t<std::make_signed_t<src2_elem_t>>>(static_cast<std::make_signed_t<src2_elem_t>>(vs2)) *
+                        static_cast<twice_t<src2_elem_t>>(vs1));
+            };
+        case 0b111011: // VWMUL
+            return [](src2_elem_t vs2, src1_elem_t vs1) {
+                return (static_cast<twice_t<std::make_signed_t<src2_elem_t>>>(static_cast<std::make_signed_t<src2_elem_t>>(vs2)) *
+                        static_cast<twice_t<std::make_signed_t<src2_elem_t>>>(static_cast<std::make_signed_t<src1_elem_t>>(vs1)));
+            };
             // case 0b111100: // VWMACCU
             // case 0b111101: // VWMACC
             // case 0b111110: // VWMACCUS