patch-2.4.2 linux/arch/s390x/lib/memset.S

• Lines: 31
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/arch/s390x/lib/memset.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/arch/s390x/lib/memset.S linux/arch/s390x/lib/memset.S
@@ -0,0 +1,30 @@
+/*
+ *  arch/s390/lib/memset.S
+ *    S390 fast memset routine
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ */
+
+/*
+ * R2 = address to memory area
+ * R3 = byte to fill memory with
+ * R4 = number of bytes to fill
+ */
+        .globl  memset
+memset:
+        LTGR    4,4
+        JZ      memset_end
+        LGR     0,2                    # save pointer to memory area
+        LGR     1,3                    # move pad byte to R1
+        LGR     3,4
+        SGR     4,4                    # no source for MVCLE, only a pad byte
+        SGR     5,5
+        MVCLE   2,4,0(1)               # thats it, MVCLE is your friend
+        JO      .-4
+        LGR     2,0                    # return pointer to mem.
+memset_end:
+        BR      14
+        
+