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2000-07-21  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/powerpc/strchr.S: Correct bugs introduced in BP-ification.
	Patch by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>.
This commit is contained in:
Ulrich Drepper 2000-07-22 02:26:07 +00:00
parent f74e61f056
commit dfef32ef79
4 changed files with 20 additions and 9 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2000-07-21 Ulrich Drepper <drepper@redhat.com>
* sysdeps/powerpc/strchr.S: Correct bugs introduced in BP-ification.
Patch by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>.
2000-07-21 Wolfram Gloger <wg@malloc.de>
* malloc/malloc.c (chunk_alloc): Try mmap_chunk() for smaller

4
linuxthreads/spinlock.h
View File

@ -48,6 +48,10 @@ static inline int compare_and_swap(long * ptr, long oldval, long newval,
#elif defined(HAS_COMPARE_AND_SWAP)
#ifdef IMPLEMENT_TAS_WITH_CAS
#define testandset(p) !__compare_and_swap(p, 0, 1)
#endif
#ifdef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
static inline int

8
linuxthreads/sysdeps/powerpc/pt-machine.h
View File

@ -28,7 +28,7 @@
/* For multiprocessor systems, we want to ensure all memory accesses
are completed before we reset a lock. On other systems, we still
need to make sure that the compiler has flushed everything to memory. */
#define MEMORY_BARRIER() __asm__ ("sync" : : : "memory")
#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory")
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
@ -36,9 +36,11 @@
register char * stack_pointer __asm__ ("r1");
/* Compare-and-swap for semaphores. */
/* note that test-and-set(x) is the same as compare-and-swap(x, 0, 1) */
/* note that test-and-set(x) is the same as !compare-and-swap(x, 0, 1) */
#define HAS_COMPARE_AND_SWAP
#define IMPLEMENT_TAS_WITH_CAS
#if BROKEN_PPC_ASM_CR0
static
#else
@ -50,7 +52,7 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
int ret;
MEMORY_BARRIER ();
__asm__ (
__asm__ __volatile__ (
"0: lwarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"

12
sysdeps/powerpc/strchr.S
View File

@ -34,7 +34,7 @@ ENTRY (BP_SYM (strchr))
# define rCHR r5 /* byte we're looking for, spread over the whole word */
# define rWORD r8 /* the current word */
#else
# define rSTR r3 /* current word pointer */
# define rSTR r8 /* current word pointer */
# define rCHR r4 /* byte we're looking for, spread over the whole word */
# define rWORD r5 /* the current word */
#endif
@ -52,10 +52,10 @@ ENTRY (BP_SYM (strchr))
rlwimi rCHR, rCHR, 8, 16, 23
li rMASK, -1
rlwimi rCHR, rCHR, 16, 0, 15
rlwinm rIGN, rSTR, 3, 27, 28
rlwinm rIGN, rRTN, 3, 27, 28
lis rFEFE, -0x101
lis r7F7F, 0x7f7f
clrrwi rSTR, rSTR, 2
clrrwi rSTR, rRTN, 2
addi rFEFE, rFEFE, -0x101
addi r7F7F, r7F7F, 0x7f7f
/* Test the first (partial?) word. */
@ -90,7 +90,7 @@ L(loopentry):
happened, though. */
L(missed):
and. rTMP1, rTMP1, rTMP2
li rSTR, 0
li rRTN, 0
STORE_RETURN_VALUE (rSTR)
beqlr
/* It did happen. Decide which one was first...
@ -108,7 +108,7 @@ L(missed):
bgtlr
cntlzw rCLZB, rTMP2
srwi rCLZB, rCLZB, 3
add rSTR, rSTR, rCLZB
add rRTN, rSTR, rCLZB
CHECK_BOUNDS_HIGH_RTN (rSTR, rTMP2, twlge)
STORE_RETURN_VALUE (rSTR)
blr
@ -121,7 +121,7 @@ L(foundit):
cntlzw rCLZB, rTMP2
subi rSTR, rSTR, 4
srwi rCLZB, rCLZB, 3
add rSTR, rSTR, rCLZB
add rRTN, rSTR, rCLZB
CHECK_BOUNDS_HIGH_RTN (rSTR, rTMP2, twlge)
STORE_RETURN_VALUE (rSTR)
blr