From 7bb49794297b46aa1c577e89da24d39b4348c6d4 Mon Sep 17 00:00:00 2001
From: batsumaru <>
Date: Sun, 9 Aug 2026 12:39:50 +0900
Subject: Added fp_t multiplication

---
 src/fixed_point.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src')

diff --git a/src/fixed_point.cpp b/src/fixed_point.cpp
index 9b2d8e2..847a5f7 100644
--- a/src/fixed_point.cpp
+++ b/src/fixed_point.cpp
@@ -8,6 +8,15 @@ fp_t fp_t::operator-(const fp_t& other) const {
     return {(int32_t)((uint32_t)raw - (uint32_t)other.raw)};
 }
 
+fp_t fp_t::operator*(const fp_t& other) const {
+    int32_t result;
+    int64_t temp;
+    temp = (int64_t)raw * (int64_t)other.raw;
+    temp += fp_t::K;
+    result = (int32_t)(temp >> fp_t::Q);
+    return {result};
+}
+
 bool fp_t::operator==(const fp_t& other) const {
     return raw == other.raw;
 }
-- 
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