From 2d7a4b6f5f568d7e5cce60acef676e737e440b4a Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Sat, 11 Feb 2023 18:51:35 -0500
Subject: [PATCH] is this optimization, or DE-optimization?!

---
 .../vgsound_emu/src/es550x/es550x.hpp         |  2 --
 .../vgsound_emu/src/es550x/es550x_filter.cpp  | 29 +++++++------------
 2 files changed, 11 insertions(+), 20 deletions(-)

diff --git a/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x.hpp b/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x.hpp
index 75f45a3b..0a9780fc 100644
--- a/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x.hpp
+++ b/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x.hpp
@@ -429,8 +429,6 @@ class es550x_shared_core : public vgsound_emu_core
 						inline s32 o4_1() { return m_o[4][0]; }
 
 					private:
-						void lp_exec(s32 coeff, const s32 in, const s32 out);
-						void hp_exec(s32 coeff, const s32 in, const s32 out);
 
 						// Registers
 						u8 m_lp = 0;  // Filter mode
diff --git a/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x_filter.cpp b/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x_filter.cpp
index afff686d..4bed2214 100644
--- a/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x_filter.cpp
+++ b/extern/vgsound_emu-modified/vgsound_emu/src/es550x/es550x_filter.cpp
@@ -8,6 +8,17 @@
 
 #include "es550x.hpp"
 
+
+// Yn = K*(Xn - Yn-1) + Yn-1
+#define lp_exec(coeff,in,out) \
+  m_o[out][1] = m_o[out][0]; \
+  m_o[out][0] = ((coeff * (m_o[in][0] - m_o[out][0])) / 4096) + m_o[out][0];
+
+// Yn = Xn - Xn-1 + K*Yn-1
+#define hp_exec(coeff,in,out) \
+  m_o[out][1] = m_o[out][0]; \
+  m_o[out][0] = m_o[in][0] - m_o[in][1] + ((coeff * m_o[out][0]) / 8192) + (m_o[out][0] / 2);
+
 // Filter functions
 void es550x_shared_core::es550x_voice_t::es550x_filter_t::reset()
 {
@@ -49,21 +60,3 @@ void es550x_shared_core::es550x_voice_t::es550x_filter_t::tick(s32 in)
 			break;
 	}
 }
-
-void es550x_shared_core::es550x_voice_t::es550x_filter_t::lp_exec(s32 coeff, const s32 in, const s32 out)
-{
-	// Store previous filter data
-	m_o[out][1] = m_o[out][0];
-
-	// Yn = K*(Xn - Yn-1) + Yn-1
-	m_o[out][0] = ((coeff * (m_o[in][0] - m_o[out][0])) / 4096) + m_o[out][0];
-}
-
-void es550x_shared_core::es550x_voice_t::es550x_filter_t::hp_exec(s32 coeff, const s32 in, const s32 out)
-{
-	// Store previous filter data
-	m_o[out][1] = m_o[out][0];
-
-	// Yn = Xn - Xn-1 + K*Yn-1
-	m_o[out][0] = m_o[in][0] - m_o[in][1] + ((coeff * m_o[out][0]) / 8192) + (m_o[out][0] / 2);
-}