From: kub <derkub@gmail.com>
Date: Fri, 2 Apr 2021 19:57:08 +0000 (+0200)
Subject: 32x, fix speed regression (wt memory write optimization)
X-Git-Tag: v2.00~563
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6138c4df25f371572591d499d5cf75e1c6e38d5d;p=picodrive.git

32x, fix speed regression (wt memory write optimization)
---

diff --git a/pico/32x/memory.c b/pico/32x/memory.c
index fe9ae57d..5ef6bca3 100644
--- a/pico/32x/memory.c
+++ b/pico/32x/memory.c
@@ -1690,16 +1690,21 @@ static void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2)
 }
 #endif
 
+static NOINLINE void REGPARM(3) sh2_write8_sdram_sync(u32 a, u32 d, SH2 *sh2)
+{
+  DRC_SAVE_SR(sh2);
+  sh2_end_run(sh2, 32);
+  DRC_RESTORE_SR(sh2);
+  sh2_write8_sdram(a, d, sh2);
+}
+
 static void REGPARM(3) sh2_write8_sdram_wt(u32 a, u32 d, SH2 *sh2)
 {
   // xmen sync hack..
-  if (a < 0x26000200) {
-    DRC_SAVE_SR(sh2);
-    sh2_end_run(sh2, 32);
-    DRC_RESTORE_SR(sh2);
-  }
-
-  sh2_write8_sdram(a, d, sh2);
+  if ((a << 8) >> 17) // ((a & 0x00ffffff) < 0x200)
+    sh2_write8_sdram(a, d, sh2);
+  else
+    sh2_write8_sdram_sync(a, d, sh2);
 }
 
 // write16