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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/memmove.S
parent953e7478a36597f227aeb487c97c03005a4a5f71 (diff)
pull from Blackfin repo: cleanup string funcs
Diffstat (limited to 'libc/string/bfin/memmove.S')
-rw-r--r--libc/string/bfin/memmove.S97
1 files changed, 54 insertions, 43 deletions
diff --git a/libc/string/bfin/memmove.S b/libc/string/bfin/memmove.S
index 3d446f326..da1128387 100644
--- a/libc/string/bfin/memmove.S
+++ b/libc/string/bfin/memmove.S
@@ -1,5 +1,5 @@
/* memmove.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 *memmove(void *dest, const void *src, size_t n);
* R0 = To Address (dest) (leave unchanged to form result)
* R1 = From Address (src)
@@ -21,75 +23,84 @@
.align 2
-.global _memmove
-.type _memmove, STT_FUNC
-_memmove:
+ /* 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_memmove
+.type ___GI_memmove, STT_FUNC
+___GI_memmove:
I1 = P3;
- P0 = R0; // P0 = To address
- P3 = R1; // P3 = From Address
- P2 = R2 ; // P2 = count
- CC = P2 == 0; //Check zero count
- IF CC JUMP finished; // very unlikely
+ P0 = R0; /* P0 = To address */
+ P3 = R1; /* P3 = From Address */
+ P2 = R2; /* P2 = count */
+ CC = P2 == 0; /* Check zero count*/
+ IF CC JUMP .Lfinished; /* very unlikely */
- CC = R1 < R0 (IU); // From < To
- IF !CC JUMP no_overlap;
+ CC = R1 < R0 (IU); /* From < To */
+ IF !CC JUMP .Lno_overlap;
R3 = R1 + R2;
- CC = R0 <= R3 (IU); // (From+len) >= To
- IF CC JUMP overlap;
-no_overlap:
+ CC = R0 <= R3 (IU); /* (From+len) >= To */
+ IF CC JUMP .Loverlap;
+.Lno_overlap:
R3 = 11;
CC = R2 <= R3;
- IF CC JUMP bytes;
- 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.
+ IF CC JUMP .Lbytes;
+ 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.*/
I0 = P3;
- P1 = P2 >> 2; // count = n/4
+ 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 to updated ptr.
- IF !CC JUMP bytes;
+ CC = P2 == 0; /* any remaining bytes? */
+ P3 = I0; /* Ammend P3 to updated ptr. */
+ IF !CC JUMP .Lbytes;
P3 = I1;
RTS;
-bytes: LSETUP (byte2_s , byte2_e) LC0=P2;
-byte2_s: R1 = B[P3++](Z);
-byte2_e: B[P0++] = R1;
+.Lbytes: LSETUP (.Lbyte2_s, .Lbyte2_e) LC0=P2;
+.Lbyte2_s: R1 = B[P3++](Z);
+.Lbyte2_e: B[P0++] = R1;
-finished:
- P3 = I1;
+.Lfinished: P3 = I1;
RTS;
-overlap:
+.Loverlap:
P2 += -1;
P0 = P0 + P2;
P3 = P3 + P2;
R1 = B[P3--] (Z);
CC = P2 == 0;
- IF CC JUMP no_loop;
- LSETUP (ol_s, ol_e) LC0 = P2;
-ol_s: B[P0--] = R1;
-ol_e: R1 = B[P3--] (Z);
-no_loop: B[P0] = R1;
+ IF CC JUMP .Lno_loop;
+#if defined(__WORKAROUND_SPECULATIVE_LOADS)
+ NOP;
+ NOP;
+#endif
+ LSETUP (.Lol_s, .Lol_e) LC0 = P2;
+.Lol_s: B[P0--] = R1;
+.Lol_e: R1 = B[P3--] (Z);
+.Lno_loop: B[P0] = R1;
P3 = I1;
RTS;
-.size _memmove,.-_memmove
-libc_hidden_def (memmove)
+.size ___GI_memmove,.-___GI_memmove
+
+.hidden ___GI_memmove
+.weak _memmove
+.set _memmove,___GI_memmove