1 files changed, 24 insertions, 0 deletions
diff --git a/libc/string/i386/rawmemchr.c b/libc/string/i386/rawmemchr.c
new file mode 100644
index 000000000..be0b142c3
--- /dev/null
+++ b/libc/string/i386/rawmemchr.c
@@ -0,0 +1,24 @@
+/*
+ * Adapted from strlen.c code
+ *
+ * Copyright (C) 2008 Denys Vlasenko <vda.linux@googlemail.com>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <string.h>
+
+#undef rawmemchr
+void *rawmemchr(const void *s, int c)
+{
+	void *eax;
+	int ecx, edi;
+	__asm__ __volatile__(
+		"	repne; scasb\n"
+		"	leal	-1(%%edi), %%eax\n"
+		: "=&c" (ecx), "=&D" (edi), "=&a" (eax)
+		: "0" (0xffffffff), "1" (s), "2" (c)
+	);
+	return eax;
+}
+libc_hidden_def(rawmemchr)