From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Wed, 20 Oct 2004 13:21:54 +0000 (+0000)
Subject: Arch-abstraction:
X-Git-Tag: svn/VALGRIND_3_0_0~1474
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb447e7be6c26053984ea12cac93e380aab7239b;p=thirdparty%2Fvalgrind.git

Arch-abstraction:
- conditionally compile x86-specific line within yield.c.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2821
---

diff --git a/none/tests/Makefile.am b/none/tests/Makefile.am
index 797032d569..e3ee379531 100644
--- a/none/tests/Makefile.am
+++ b/none/tests/Makefile.am
@@ -107,6 +107,7 @@ system_SOURCES 		= system.c
 #tls2_so_SOURCES		= tls2_so.c
 #tls2_so_LDFLAGS		= -shared
 yield_SOURCES		= yield.c
+yield_CFLAGS		= $(AM_CFLAGS) -D__$(VG_ARCH)__
 yield_LDADD		= -lpthread
 
 # pthread C ones
diff --git a/none/tests/yield.c b/none/tests/yield.c
index 45694d8d94..11ec724ea4 100644
--- a/none/tests/yield.c
+++ b/none/tests/yield.c
@@ -35,7 +35,11 @@ static void *th2(void *v)
 
 	while(alive) {
 		rep_nop++;
+#ifdef __x86__
+                // This gives a hint to a P4, telling it to pause 
+                // (ie. we're in a spin-wait loop)
 		asm volatile ("rep; nop" : : : "memory");
+#endif
 	}
 
 	return 0;