Only use inline-asm with gcc. Add fallback for other compilers

git-svn-id: svn://mattst88.com/svn/glpong/trunk@10 449aeecc-241a-0410-943f-e2f883e2d7a2

1 files changed, 8 insertions, 0 deletions

diff --git a/glpong.c b/glpong.c
index b5ad25c..6642f3b 100644
--- a/glpong.c
+++ b/glpong.c
@@ -168,6 +168,8 @@ GLPong_HandleEvents() {
 
 static INLINE unsigned int
 NextPow2(unsigned int value) {   
+#if (defined __i386__ || defined __amd64__ || defined __x86_64__) \
+ && (defined __GNUC__)
 	unsigned int x;
 	__asm(
 		"dec    %1      \n\t" /* so that if the number is a power of 
@@ -179,6 +181,12 @@ NextPow2(unsigned int value) {
 		: "=r" (x)
 		: "c" (value)
 	);
+#else
+	unsigned int x = 0;
+	while (x < value) {
+		x *= 2;
+	}
+#endif
 	return x;
 }