This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
/* See strlen.s for comments on how the end-of-string testing works. */
-EALIGN(__stpcpy,4,0)
/* char * [r3] stpcpy (char *dest [r3], const char *src [r4]) */
-/* General register assignments:
- r0: temporary
- r3: pointer to previous word in dest
- r4: pointer to previous word in src
- r6: current word from src
- r7: 0xfefefeff
- r8: 0x7f7f7f7f
- r9: ~(word in src | 0x7f7f7f7f)
- r10: alternate word from src. */
-
- or r0,r4,r3
- clrlwi. r0,r0,30
- addi r3,r3,-4
- bne L(unaligned)
-
- lis r7,0xfeff
- lis r8,0x7f7f
- lwz r6,0(r4)
- addi r7,r7,-0x101
- addi r8,r8,0x7f7f
- b L(g2)
-
-L(g0): lwzu r10,4(r4)
- stwu r6,4(r3)
- add r0,r7,r10
- nor r9,r8,r10
- and. r0,r0,r9
- bne- L(g1)
- lwzu r6,4(r4)
- stwu r10,4(r3)
-L(g2): add r0,r7,r6
- nor r9,r8,r6
- and. r0,r0,r9
- beq+ L(g0)
-
- mr r10,r6
+EALIGN (BP_SYM (__stpcpy), 4, 0)
+
+#define rTMP r0
+#define rRTN r3
+#if __BOUNDED_POINTERS__
+# define rDEST r4 /* pointer to previous word in dest */
+# define rSRC r5 /* pointer to previous word in src */
+# define rLOW r11
+# define rHIGH r12
+#else
+# define rDEST r3 /* pointer to previous word in dest */
+# define rSRC r4 /* pointer to previous word in src */
+#endif
+#define rWORD r6 /* current word from src */
+#define rFEFE r7 /* 0xfefefeff */
+#define r7F7F r8 /* 0x7f7f7f7f */
+#define rNEG r9 /* ~(word in src | 0x7f7f7f7f) */
+#define rALT r10 /* alternate word from src */
+
+ CHECK_BOUNDS_LOW (rSRC, rLOW, rHIGH)
+ CHECK_BOUNDS_LOW (rDEST, rLOW, rHIGH)
+ STORE_RETURN_BOUNDS (rLOW, rHIGH)
+
+ or rTMP, rSRC, rDEST
+ clrlwi. rTMP, rTMP, 30
+ addi rDEST, rDEST, -4
+ bne L(unaligned)
+
+ lis rFEFE, -0x101
+ lis r7F7F, 0x7f7f
+ lwz rWORD, 0(rSRC)
+ addi rFEFE, rFEFE, -0x101
+ addi r7F7F, r7F7F, 0x7f7f
+ b L(g2)
+
+L(g0): lwzu rALT, 4(rSRC)
+ stwu rWORD, 4(rDEST)
+ add rTMP, rFEFE, rALT
+ nor rNEG, r7F7F, rALT
+ and. rTMP, rTMP, rNEG
+ bne- L(g1)
+ lwzu rWORD, 4(rSRC)
+ stwu rALT, 4(rDEST)
+L(g2): add rTMP, rFEFE, rWORD
+ nor rNEG, r7F7F, rWORD
+ and. rTMP, rTMP, rNEG
+ beq+ L(g0)
+
+ mr rALT, rWORD
/* We've hit the end of the string. Do the rest byte-by-byte. */
-L(g1): rlwinm. r0,r10,8,24,31
- stbu r0,4(r3)
+L(g1): rlwinm. rTMP, rALT, 8, 24, 31
+ stbu rTMP, 4(rDEST)
beqlr-
- rlwinm. r0,r10,16,24,31
- stbu r0,1(r3)
+ rlwinm. rTMP, rALT, 16, 24, 31
+ stbu rTMP, 1(rDEST)
beqlr-
- rlwinm. r0,r10,24,24,31
- stbu r0,1(r3)
+ rlwinm. rTMP, rALT, 24, 24, 31
+ stbu rTMP, 1(rDEST)
beqlr-
- stbu r10,1(r3)
+ stbu rALT, 1(rDEST)
+ CHECK_BOUNDS_HIGH (rDEST, rHIGH, twlgt)
+ STORE_RETURN_VALUE (rDEST)
blr
/* Oh well. In this case, we just do a byte-by-byte copy. */
.align 4
nop
L(unaligned):
- lbz r6,0(r4)
- addi r3,r3,3
- cmpwi r6,0
- beq- L(u2)
-
-L(u0): lbzu r10,1(r4)
- stbu r6,1(r3)
- cmpwi r10,0
- beq- L(u1)
+ lbz rWORD, 0(rSRC)
+ addi rDEST, rDEST, 3
+ cmpwi rWORD, 0
+ beq- L(u2)
+
+L(u0): lbzu rALT, 1(rSRC)
+ stbu rWORD, 1(rDEST)
+ cmpwi rALT, 0
+ beq- L(u1)
nop /* Let 601 load start of loop. */
- lbzu r6,1(r4)
- stbu r10,1(r3)
- cmpwi r6,0
- bne+ L(u0)
-L(u2): stbu r6,1(r3)
+ lbzu rWORD, 1(rSRC)
+ stbu rALT, 1(rDEST)
+ cmpwi rWORD, 0
+ bne+ L(u0)
+L(u2): stbu rWORD, 1(rDEST)
+ CHECK_BOUNDS_HIGH (rDEST, rHIGH, twlgt)
+ STORE_RETURN_VALUE (rDEST)
blr
-L(u1): stbu r10,1(r3)
+L(u1): stbu rALT, 1(rDEST)
+ CHECK_BOUNDS_HIGH (rDEST, rHIGH, twlgt)
+ STORE_RETURN_VALUE (rDEST)
blr
-END(__stpcpy)
+END (BP_SYM (__stpcpy))
-weak_alias (__stpcpy, stpcpy)
+weak_alias (BP_SYM (__stpcpy), BP_SYM (stpcpy))
projects / kopensolaris-gnu / glibc.git / blobdiff