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2000-12-27  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/alpha/alphaev6/memcpy.S: Don't go through unrolled loop
	if we would go through it only once.
	Patch by Rick Gorton <rick.gorton@api-networks.com>.

	* sysdeps/alpha/alphaev67/strncat.S: Fix handling of numeric parameter.
	Patch by Richard Henderson <rth@redhat.com>.

2000-12-27  Jakub Jelinek  <jakub@redhat.com>

	* malloc/malloc.c (memmove): Add prototypes.
	(MALLOC_MEMMOVE): Define.
	(chunk_realloc): Use it instead of MALLOC_COPY if source and
	destination might overlap.
This commit is contained in:
Ulrich Drepper 2000-12-27 23:38:53 +00:00
parent 5fba3e5e3c
commit bb548f63d5
3 changed files with 45 additions and 41 deletions
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16
ChangeLog
View File

@ -1,3 +1,19 @@
2000-12-27 Ulrich Drepper <drepper@redhat.com>
* sysdeps/alpha/alphaev6/memcpy.S: Don't go through unrolled loop
if we would go through it only once.
Patch by Rick Gorton <rick.gorton@api-networks.com>.
* sysdeps/alpha/alphaev67/strncat.S: Fix handling of numeric parameter.
Patch by Richard Henderson <rth@redhat.com>.
2000-12-27 Jakub Jelinek <jakub@redhat.com>
* malloc/malloc.c (memmove): Add prototypes.
(MALLOC_MEMMOVE): Define.
(chunk_realloc): Use it instead of MALLOC_COPY if source and
destination might overlap.
2000-12-27 Andreas Jaeger <aj@suse.de>
* stdio-common/printf_fp.c (__printf_fp): Add prototype for nested

6
sysdeps/alpha/alphaev6/memcpy.S
View File

@ -16,7 +16,7 @@
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. */
/*
* Much of the information about 21264 scheduling/coding comes from:
* Compiler Writer's Guide for the Alpha 21264
@ -86,9 +86,9 @@ $single_head_quad:
$do_unroll:
addq $16, 64, $7 # E : Initial (+1 trip) wh64 address
cmple $18, 63, $1 # E : Can we go through the unrolled loop?
cmple $18, 127, $1 # E : Can we go through the unrolled loop?
bne $1, $tail_quads # U : Nope
nop # E :
nop # E :
$unroll_body:
wh64 ($7) # L1 : memory subsystem hint: 64 bytes at

64
sysdeps/alpha/alphaev67/strncat.S
View File

@ -38,57 +38,45 @@ ENTRY(strncat)
#endif
.prologue 1
mov $16, $0 # set up return value
beq $18, $zerocount # U :
mov a0, v0 # set up return value
beq a2, $zerocount # U :
/* Find the end of the string. */
ldq_u $1, 0($16) # L : load first quadword ($16 may be misaligned)
lda $2, -1($31) # E :
ldq_u t0, 0(a0) # L : load first quadword (a0 may be misaligned)
lda t1, -1 # E :
insqh $2, $0, $2 # U :
andnot $16, 7, $16 # E :
insqh t1, v0, t1 # U :
andnot a0, 7, a0 # E :
nop # E :
or $2, $1, $1 # E :
or t1, t0, t0 # E :
nop # E :
nop # E :
cmpbge $31, $1, $2 # E : bits set iff byte == 0
bne $2, $found # U :
cmpbge zero, t0, t1 # E : bits set iff byte == 0
bne t1, $found # U :
$loop: ldq $1, 8($16) # L :
addq $16, 8, $16 # E :
cmpbge $31, $1, $2 # E :
beq $2, $loop # U :
$loop: ldq t0, 8(a0) # L :
addq a0, 8, a0 # E :
cmpbge zero, t0, t1 # E :
beq t1, $loop # U :
$found: cttz $2, $3 # U0 :
addq $16, $3, $16 # E :
jsr $23, __stxncpy # L0 :/* Now do the append. */
$found: cttz t1, t2 # U0 :
addq a0, t2, a0 # E :
jsr t9, __stxncpy # L0 : Now do the append.
/* Worry about the null termination. */
zapnot $1, $27, $2 # U : was last byte a null?
cmplt $27, $24, $5 # E : did we fill the buffer completely?
bne $2, 0f # U :
cttz t10, t2 # U0: byte offset of end-of-count.
nop # E :
zapnot t0, t8, t1 # U : was last byte a null?
nop # E :
bne t1, 0f # U :
nop # E :
nop # E :
ret # L0 :
0: or $5, $18, $2 # E :
nop
bne $2, 2f # U :
and $24, 0x80, $3 # E : no zero next byte
nop # E :
bne $3, 1f # U :
/* Here there are bytes left in the current word. Clear one. */
addq $24, $24, $24 # E : end-of-count bit <<= 1
nop # E :
2: zap $1, $24, $1 # U :
nop # E :
stq_u $1, 0($16) # L :
ret # L0 :
1: /* Here we must clear the first byte of the next DST word */
stb $31, 8($16) # L :
nop # E :
0: addq t2, a0, a0 # E : address of end-of-count
stb zero, 1(a0) # L :
nop # E :
ret # L0 :