From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 8 Jul 2012 04:05:08 +0000 (-0400)
Subject: remove little-endian assumption from arm atomic.h
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=a3bdcd93764ba514ca83ccbc5c85fefaf18d31d7

remove little-endian assumption from arm atomic.h

this hidden endian dependency had left big endian arm badly broken.
---

diff --git a/arch/arm/atomic.h b/arch/arm/atomic.h
index 8dc31b2e..f434a0c6 100644
--- a/arch/arm/atomic.h
+++ b/arch/arm/atomic.h
@@ -99,14 +99,16 @@ static inline void a_or(volatile int *p, int v)
 
 static inline void a_and_64(volatile uint64_t *p, uint64_t v)
 {
-	a_and((int *)p, v);
-	a_and((int *)p+1, v>>32);
+	union { uint64_t v; uint32_t r[2]; } u = { v };
+	a_and((int *)p, u.r[0]);
+	a_and((int *)p+1, u.r[1]);
 }
 
 static inline void a_or_64(volatile uint64_t *p, uint64_t v)
 {
-	a_or((int *)p, v);
-	a_or((int *)p+1, v>>32);
+	union { uint64_t v; uint32_t r[2]; } u = { v };
+	a_or((int *)p, u.r[0]);
+	a_or((int *)p+1, u.r[1]);
 }
 
 #endif