From: kub <derkub@gmail.com>
Date: Sat, 8 Feb 2020 12:29:32 +0000 (+0100)
Subject: sh2 drc: fix for crash in generated code on x86_64
X-Git-Tag: v2.00~790
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f36709e65142736031062d553e07c91fc0601ec1;p=picodrive.git

sh2 drc: fix for crash in generated code on x86_64
---

diff --git a/cpu/drc/emit_x86.c b/cpu/drc/emit_x86.c
index ec13551e..80ec0444 100644
--- a/cpu/drc/emit_x86.c
+++ b/cpu/drc/emit_x86.c
@@ -1007,7 +1007,8 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI,	// x86-64,i386 common
 #define host_instructions_updated(base, end)	(void)(base),(void)(end)
 #define	emith_update_cache()	/**/
 
-#define emith_rw_offs_max()	0xffffffff
+// NB this MUST be <0x40000000 to avoid overflow in address calculations
+#define emith_rw_offs_max()	0xfffffff // for better perfomance: <0x10000000
 
 #ifdef __x86_64__