diff --git a/src/gu/sceGuTexImage.c b/src/gu/sceGuTexImage.c
index fd7b1997..748c4bd1 100644
--- a/src/gu/sceGuTexImage.c
+++ b/src/gu/sceGuTexImage.c
@@ -14,14 +14,7 @@ static int tsizecmd_tbl[8] = { 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf };
 
 int getExp(int val)
 {
-	unsigned int i;
-	asm("clz %0, %1\n":"=r"(i):"r"(val&0x3FF));
-	return 31-i;
-/*
-	unsigned int i;
-	for (i = 9; (i > 0) && !((val >> i) & 1); --i);
-	return i;
-*/
+	return 31 - __builtin_clz(val & 0x3FF);
 }
 
 void sceGuTexImage(int mipmap, int width, int height, int tbw, const void* tbp)