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authorMike Frysinger <vapier@gentoo.org>2007-09-15 11:04:21 +0000
committerMike Frysinger <vapier@gentoo.org>2007-09-15 11:04:21 +0000
commit7efe92d0cadd12d3316939474f56a3f6e727a0b0 (patch)
tree1091149e7e94e1de15889d40637d5d3ca1add2f5 /libc/string/bfin/memcpy.S
parent953e7478a36597f227aeb487c97c03005a4a5f71 (diff)
pull from Blackfin repo: cleanup string funcs
Diffstat (limited to 'libc/string/bfin/memcpy.S')
-rw-r--r--libc/string/bfin/memcpy.S74
1 files changed, 41 insertions, 33 deletions
diff --git a/libc/string/bfin/memcpy.S b/libc/string/bfin/memcpy.S
index e7ba7048e..ae40cb244 100644
--- a/libc/string/bfin/memcpy.S
+++ b/libc/string/bfin/memcpy.S
@@ -1,5 +1,5 @@
/* memcpy.S
- * Copyright (C) 2003, 2005, 2006 Analog Devices Inc., All Rights Reserved.
+ * Copyright (C) 2003-2007 Analog Devices Inc., All Rights Reserved.
*
* This file is subject to the terms and conditions of the GNU Library General
* Public License. See the file "COPYING.LIB" in the main directory of this
@@ -9,6 +9,8 @@
* http://www.analog.com/processors/resources/crosscore/visualDspDevSoftware.html
*/
+#include <sysdep.h>
+
/* void *memcpy(void *dest, const void *src, size_t n);
* R0 = To Address (dest) (leave unchanged to form result)
* R1 = From Address (src)
@@ -21,54 +23,60 @@
.align 2
-.global _memcpy
-.type _memcpy, STT_FUNC
-_memcpy:
+/* We have to bypass the libc-symbols.h machinery to make sure we get
+ * a weak symbol for memcpy (some crummy gcc tests want to redefine it).
+ */
+.global ___GI_memcpy
+.type ___GI_memcpy, STT_FUNC
+___GI_memcpy:
[--SP] = P3;
- P0 = R0; // P0 = To address
- P3 = R1; // P3 = From Address
- P2 = R2 ; // P2 = count
+ P0 = R0; /* P0 = To address */
+ P3 = R1; /* P3 = From Address */
+ P2 = R2; /* P2 = count */
CC = R2 <= 7(IU);
- IF CC JUMP too_small;
+ IF CC JUMP .Ltoo_small;
I0 = R1;
- R3 = R1 | R0; // OR addresses together
- R3 <<= 30; // check bottom two bits
- CC = AZ; // AZ set if zero.
- IF !CC JUMP bytes ; // Jump if addrs not aligned.
- P1 = P2 >> 2; // count = n/4
+ R3 = R1 | R0; /* OR addresses together */
+ R3 <<= 30; /* check bottom two bits */
+ CC = AZ; /* AZ set if zero. */
+ IF !CC JUMP .Lbytes; /* Jump if addrs not aligned. */
+ P1 = P2 >> 2; /* count = n/4 */
P1 += -1;
R3 = 3;
- R2 = R2 & R3; // remainder
- P2 = R2; // set remainder
+ R2 = R2 & R3; /* remainder */
+ P2 = R2; /* set remainder */
R1 = [I0++];
#if !defined(__WORKAROUND_AVOID_DAG1)
- LSETUP (quad_loop , quad_loop) LC0=P1;
-quad_loop: MNOP || [P0++] = R1 || R1 = [I0++];
+ LSETUP (.Lquad_loop, .Lquad_loop) LC0=P1;
+.Lquad_loop: MNOP || [P0++] = R1 || R1 = [I0++];
#else
- LSETUP (quad_loop_s , quad_loop_e) LC0=P1;
-quad_loop_s: [P0++] = R1;
-quad_loop_e: R1 = [I0++];
+ LSETUP (.Lquad_loop_s, .Lquad_loop_e) LC0=P1;
+.Lquad_loop_s: [P0++] = R1;
+.Lquad_loop_e: R1 = [I0++];
#endif
[P0++] = R1;
- CC = P2 == 0; // any remaining bytes?
- P3 = I0; // Ammend P3 for remaining copy
- IF !CC JUMP bytes;
+ CC = P2 == 0; /* any remaining bytes? */
+ P3 = I0; /* Ammend P3 for remaining copy */
+ IF !CC JUMP .Lbytes;
P3 = [SP++];
RTS;
-too_small:
- CC = P2 == 0; //Check zero count
- IF CC JUMP finished; // very unlikely
+.Ltoo_small:
+ CC = P2 == 0; /* Check zero count */
+ IF CC JUMP .Lfinished; /* very unlikely */
-bytes:
- LSETUP (byte_loop_s , byte_loop_e) LC0=P2;
-byte_loop_s: R1 = B[P3++](Z);
-byte_loop_e: B[P0++] = R1;
+.Lbytes:
+ LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2;
+.Lbyte_loop_s: R1 = B[P3++](Z);
+.Lbyte_loop_e: B[P0++] = R1;
-finished:
+.Lfinished:
P3 = [SP++];
+
RTS;
-.size _memcpy,.-_memcpy
+.size ___GI_memcpy,.-___GI_memcpy
-libc_hidden_def (memcpy)
+.hidden ___GI_memcpy
+.weak _memcpy
+.set _memcpy,___GI_memcpy