patch-2.1.44 linux/arch/mips/lib/memset.c

• Lines: 72
• Date: Thu Jun 26 12:33:37 1997
• Orig file: v2.1.43/linux/arch/mips/lib/memset.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.43/linux/arch/mips/lib/memset.c linux/arch/mips/lib/memset.c
@@ -0,0 +1,71 @@
+/* linux/arch/mips/lib/memset.c
+ *
+ * This is from GNU libc.
+ */
+
+#include <linux/types.h>
+
+#define op_t unsigned long int
+#define OPSIZ (sizeof(op_t))
+
+typedef unsigned char byte;
+
+void *memset(void *dstpp, char c, size_t len)
+{
+	long int dstp = (long int) dstpp;
+
+	if (len >= 8) {
+			size_t xlen;
+			op_t cccc;
+
+			cccc = (unsigned char) c;
+			cccc |= cccc << 8;
+			cccc |= cccc << 16;
+
+			/* There are at least some bytes to set.
+			   No need to test for LEN == 0 in this alignment loop.  */
+			while (dstp % OPSIZ != 0) {
+				((byte *) dstp)[0] = c;
+				dstp += 1;
+				len -= 1;
+			}
+
+			/* Write 8 `op_t' per iteration until less
+			 * than 8 `op_t' remain.
+			 */
+			xlen = len / (OPSIZ * 8);
+			while (xlen > 0) {
+				((op_t *) dstp)[0] = cccc;
+				((op_t *) dstp)[1] = cccc;
+				((op_t *) dstp)[2] = cccc;
+				((op_t *) dstp)[3] = cccc;
+				((op_t *) dstp)[4] = cccc;
+				((op_t *) dstp)[5] = cccc;
+				((op_t *) dstp)[6] = cccc;
+				((op_t *) dstp)[7] = cccc;
+				dstp += 8 * OPSIZ;
+				xlen -= 1;
+			}
+			len %= OPSIZ * 8;
+
+			/* Write 1 `op_t' per iteration until less than
+			 * OPSIZ bytes remain.
+			 */
+			xlen = len / OPSIZ;
+			while (xlen > 0) {
+				((op_t *) dstp)[0] = cccc;
+				dstp += OPSIZ;
+				xlen -= 1;
+			}
+			len %= OPSIZ;
+	}
+
+	/* Write the last few bytes.  */
+	while (len > 0) {
+		((byte *) dstp)[0] = c;
+		dstp += 1;
+		len -= 1;
+	}
+
+	return dstpp;
+}