import KernelEx-4.0-RC1

kexcrt/memset.c

@@ -0,0 +1,29 @@
+/*
+ * memset.c
+ */
+
+#include <string.h>
+
+void *memset(void *dst, int c, size_t n)
+{
+	char *q = dst;
+
+#if defined(__i386__)
+	size_t nl = n >> 2;
+	asm volatile ("cld ; rep ; stosl ; movl %3,%0 ; rep ; stosb"
+		      : "+c" (nl), "+D" (q)
+		      : "a" ((unsigned char)c * 0x01010101U), "r" (n & 3));
+#elif defined(__x86_64__)
+	size_t nq = n >> 3;
+	asm volatile ("cld ; rep ; stosq ; movl %3,%%ecx ; rep ; stosb"
+		      :"+c" (nq), "+D" (q)
+		      : "a" ((unsigned char)c * 0x0101010101010101U),
+			"r" ((uint32_t) n & 7));
+#else
+	while (n--) {
+		*q++ = c;
+	}
+#endif
+
+	return dst;
+}