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+/*******************************************************************************
+ *
+ * Copyright (c) 1993 Intel Corporation
+ *
+ * Intel hereby grants you permission to copy, modify, and distribute this
+ * software and its documentation. Intel grants this permission provided
+ * that the above copyright notice appears in all copies and that both the
+ * copyright notice and this permission notice appear in supporting
+ * documentation. In addition, Intel grants this permission provided that
+ * you prominently mark as "not part of the original" any modifications
+ * made to this software or documentation, and that the name of Intel
+ * Corporation not be used in advertising or publicity pertaining to
+ * distribution of the software or the documentation without specific,
+ * written prior permission.
+ *
+ * Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR
+ * IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY
+ * OR FITNESS FOR A PARTICULAR PURPOSE. Intel makes no guarantee or
+ * representations regarding the use of, or the results of the use of,
+ * the software and documentation in terms of correctness, accuracy,
+ * reliability, currentness, or otherwise; and you rely on the software,
+ * documentation and results solely at your own risk.
+ *
+ * IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS,
+ * LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES
+ * OF ANY KIND. IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM
+ * PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER.
+ *
+ ******************************************************************************/
+
+ .file "memset.s"
+#ifdef __PIC
+ .pic
+#endif
+#ifdef __PID
+ .pid
+#endif
+/*
+ * (c) copyright 1989,1993 Intel Corp., all rights reserved
+ */
+
+/*
+ procedure memset (optimized assembler version: 80960K series, 80960CA)
+
+ dest_addr = memset (dest_addr, char, len)
+
+ Fill len bytes pointed to by dest_addr with the value of char.
+ Return the original address of dest_addr.
+
+ This program avoids performing unaligned accesses. It stores
+ from zero to seven bytes, and then stores aligned longwords,
+ and then stores from zero to seven bytes, as necessary to
+ store len bytes starting at dest_addr.
+
+ At the time of this writing, only g0 thru g7 and g13 are available
+ for use in this leafproc; other registers would have to be saved and
+ restored. These nine registers, plus tricky use of g14 are sufficient
+ to implement the routine.
+*/
+
+ .globl _memset
+ .globl __memset
+ .leafproc _memset, __memset
+ .align 2
+_memset:
+#ifndef __PIC
+ lda Lrett,g14
+#else
+ lda Lrett-(.+8)(ip),g14
+#endif
+__memset:
+ cmpo 7,g2 # are there fewer than seven characters to move?
+ lda (g14),g13 # save return address
+ notand g0,7,g3 # test for non-aligned dest_ptr
+ lda 0,g14 # conform to register conventions
+ shlo 24,g1,g4 # prepare word of char
+ lda (g0),g6 # preserve dest_ptr for return
+ shro 8,g4,g5
+ bge.f Lcloop_setup
+ cmpo g3,g0 # is dest longword aligned
+ lda 7(g3),g3 # bump dest_ptr to next longword boundary
+ or g4,g5,g4
+ be.t Lwloop_setup
+
+Lbgn_cloop:
+ cmpo g6,g3 # Have we reached longword boundary?
+ stob g1,(g6) # store one byte of char
+ subo 1,g2,g2 # decrement len
+ lda 1(g6),g6 # increment dest_ptr
+ bne.t Lbgn_cloop # loop if more bytes to store before longword
+
+ cmpobge.f 7,g2,Lcloop
+
+Lwloop_setup:
+ shro 16,g4,g5
+ or g4,g5,g4
+ mov g4,g5 # now have a longword of char
+
+Lwloop:
+ cmpo 15,g2 # Do we have to store more longwords?
+ stl g4,(g6) # Store longword of char
+ subo 8,g2,g2 # Decrement len
+ lda 8(g6),g6 # Increment dest_ptr
+ bl.t Lwloop # loop if more longwords to store
+
+Lcloop_setup:
+ cmpobge.t 0,g2,Lexit
+
+Lcloop:
+ cmpo 1,g2 # Is len exhausted?
+ stob g1,(g6) # Store byte
+ subo 1,g2,g2 # Decrement len
+ lda 1(g6),g6 # Increment dest_ptr
+ bne.t Lcloop # loop if more bytes to store
+
+Lexit:
+ bx (g13)
+Lrett:
+ ret
+
+/* end of memset */