alpha: Remove bzero optimization

The symbols is not present in current POSIX specification and compiler
already generates memmove call.

diff --git a/sysdeps/alpha/bzero.S b/sysdeps/alpha/bzero.S
deleted file mode 100644 (file)
index 4821778..0000000
--- a/sysdeps/alpha/bzero.S
+++ /dev/null
@@ -1,109 +0,0 @@
-/* Copyright (C) 1996-2022 Free Software Foundation, Inc.
-   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 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* Fill a block of memory with zeros.  Optimized for the Alpha architecture:
-
-   - memory accessed as aligned quadwords only
-   - destination memory not read unless needed for good cache behaviour
-   - basic blocks arranged to optimize branch prediction for full-quadword
-     aligned memory blocks.
-   - partial head and tail quadwords constructed with byte-mask instructions
-
-   This is generally scheduled for the EV5 (got to look out for my own
-   interests :-), but with EV4 needs in mind.  There *should* be no more
-   stalls for the EV4 than there are for the EV5.
-*/
-
-
-#include <sysdep.h>
-
-       .set noat
-       .set noreorder
-
-       .text
-       .type   __bzero, @function
-       .globl  __bzero
-       .usepv  __bzero, USEPV_PROF
-
-       cfi_startproc
-
-       /* On entry to this basic block:
-          t3 == loop counter
-          t4 == bytes in partial final word
-          a0 == possibly misaligned destination pointer  */
-
-       .align 3
-bzero_loop:
-       beq     t3, $tail       #
-       blbc    t3, 0f          # skip single store if count even
-
-       stq_u   zero, 0(a0)     # e0    : store one word
-       subq    t3, 1, t3       # .. e1 :
-       addq    a0, 8, a0       # e0    :
-       beq     t3, $tail       # .. e1 :
-
-0:     stq_u   zero, 0(a0)     # e0    : store two words
-       subq    t3, 2, t3       # .. e1 :
-       stq_u   zero, 8(a0)     # e0    :
-       addq    a0, 16, a0      # .. e1 :
-       bne     t3, 0b          # e1    :
-
-$tail: bne     t4, 1f          # is there a tail to do?
-       ret                     # no
-
-1:     ldq_u   t0, 0(a0)       # yes, load original data
-       mskqh   t0, t4, t0      #
-       stq_u   t0, 0(a0)       #
-       ret                     #
-
-__bzero:
-#ifdef PROF
-       ldgp    gp, 0(pv)
-       lda     AT, _mcount
-       jsr     AT, (AT), _mcount
-#endif
-
-       mov     a0, v0          # e0    : move return value in place
-       beq     a1, $done       # .. e1 : early exit for zero-length store
-       and     a0, 7, t1       # e0    :
-       addq    a1, t1, a1      # e1    : add dest misalignment to count
-       srl     a1, 3, t3       # e0    : loop = count >> 3
-       and     a1, 7, t4       # .. e1 : find number of bytes in tail
-       unop                    #       :
-       beq     t1, bzero_loop  # e1    : aligned head, jump right in
-
-       ldq_u   t0, 0(a0)       # e0    : load original data to mask into
-       cmpult  a1, 8, t2       # .. e1 : is this a sub-word set?
-       bne     t2, $oneq       # e1    :
-
-       mskql   t0, a0, t0      # e0    : we span words.  finish this partial
-       subq    t3, 1, t3       # e0    :
-       addq    a0, 8, a0       # .. e1 :
-       stq_u   t0, -8(a0)      # e0    :
-       br      bzero_loop      # .. e1 :
-
-       .align 3
-$oneq:
-       mskql   t0, a0, t2      # e0    :
-       mskqh   t0, a1, t3      # e0    :
-       or      t2, t3, t0      # e1    :
-       stq_u   t0, 0(a0)       # e0    :
-
-$done: ret
-
-       cfi_endproc
-weak_alias (__bzero, bzero)