File 0001-Workaround-clang-confusing-itself-compile-... of Package dosbox

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File 0001-Workaround-clang-confusing-itself-compile-error-resu.patch of Package dosbox

From 783249a7da83ed6eec62935d8ba7431d7cce652c Mon Sep 17 00:00:00 2001
From: qbix79 <qbix79@ed541006-0bf7-43e9-8c4d-6fc63c346d47>
Date: Wed, 21 Jan 2015 20:50:40 +0000
Subject: [PATCH] Workaround clang confusing itself (compile error), results in
 a small speed up in general (thanks for helping wjp). clang compiled x64
 dynrec core appears to be unstable though. (-O0 seems to help)

git-svn-id: http://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3894 ed541006-0bf7-43e9-8c4d-6fc63c346d47
---
 src/cpu/core_dynrec/risc_x64.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/cpu/core_dynrec/risc_x64.h b/src/cpu/core_dynrec/risc_x64.h
index 58f9d2e..0f1d949 100644
--- a/src/cpu/core_dynrec/risc_x64.h
+++ b/src/cpu/core_dynrec/risc_x64.h
@@ -85,7 +85,8 @@ static void gen_mov_regs(HostReg reg_dst,HostReg reg_src) {
 
 static INLINE void gen_reg_memaddr(HostReg reg,void* data) {
 	Bit64s diff = (Bit64s)data-((Bit64s)cache.pos+5);
-	if ((diff<0x80000000LL) && (diff>-0x80000000LL)) {
+//	if ((diff<0x80000000LL) && (diff>-0x80000000LL)) { //clang messes itself up on this...
+	if ( (diff>>63) == (diff>>31) ) { //signed bit extend, test to see if value fits in a Bit32s
 		cache_addb(0x05+(reg<<3));
 		// RIP-relative addressing is offset after the instruction 
 		cache_addd((Bit32u)(((Bit64u)diff)&0xffffffffLL)); 
@@ -100,7 +101,8 @@ static INLINE void gen_reg_memaddr(HostReg reg,void* data) {
 static INLINE void gen_memaddr(Bitu op,void* data,Bitu off) {
 	Bit64s diff;
 	diff = (Bit64s)data-((Bit64s)cache.pos+off+5);
-	if ((diff<0x80000000LL) && (diff>-0x80000000LL)) {
+//	if ((diff<0x80000000LL) && (diff>-0x80000000LL)) {
+	if ( (diff>>63) == (diff>>31) ) {
 		// RIP-relative addressing is offset after the instruction 
 		cache_addb(op+1);
 		cache_addd((Bit32u)(((Bit64u)diff)&0xffffffffLL)); 
-- 
2.7.0

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File 0001-Workaround-clang-confusing-itself-compile-error-resu.patch of Package dosbox

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