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aarch64: Import memrchr.S 

Import memrchr.S for AArch64 from:

https://github.com/ARM-software/optimized-routines

commit 0cf84f26b6b8dcad8287fe30a4dcc1fdabd06560
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date:   Thu Jul 27 17:14:57 2023 +0200

    string: Fix corrupt GNU_PROPERTY_TYPE (5) size

    For ELF32 the notes alignment is 4 and not 8.
This commit is contained in:
Sebastian Huber 2023-09-12 10:33:14 +02:00
parent 96ec8f868e
commit fe5886a500
4 changed files with 168 additions and 0 deletions
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40
newlib/Makefile.in
View File

@ -596,6 +596,8 @@ check_PROGRAMS =
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memcpy.S \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memcpy.S \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memmove-stub.c \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memmove-stub.c \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memmove.S \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memmove.S \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memrchr-stub.c \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memrchr.S \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memset-stub.c \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memset-stub.c \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memset.S \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/memset.S \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/rawmemchr.S \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/rawmemchr.S \
@ -1847,6 +1849,8 @@ am__objects_51 = libc/ssp/libc_a-chk_fail.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memcpy.$(OBJEXT) \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memcpy.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memmove-stub.$(OBJEXT) \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memmove-stub.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memmove.$(OBJEXT) \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memmove.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memrchr-stub.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memrchr.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memset-stub.$(OBJEXT) \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memset-stub.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memset.$(OBJEXT) \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memset.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-rawmemchr.$(OBJEXT) \ @HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-rawmemchr.$(OBJEXT) \
@ -8024,6 +8028,12 @@ libc/machine/aarch64/libc_a-memmove-stub.$(OBJEXT): \
libc/machine/aarch64/libc_a-memmove.$(OBJEXT): \ libc/machine/aarch64/libc_a-memmove.$(OBJEXT): \
libc/machine/aarch64/$(am__dirstamp) \ libc/machine/aarch64/$(am__dirstamp) \
libc/machine/aarch64/$(DEPDIR)/$(am__dirstamp) libc/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
libc/machine/aarch64/libc_a-memrchr-stub.$(OBJEXT): \
libc/machine/aarch64/$(am__dirstamp) \
libc/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
libc/machine/aarch64/libc_a-memrchr.$(OBJEXT): \
libc/machine/aarch64/$(am__dirstamp) \
libc/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
libc/machine/aarch64/libc_a-memset-stub.$(OBJEXT): \ libc/machine/aarch64/libc_a-memset-stub.$(OBJEXT): \
libc/machine/aarch64/$(am__dirstamp) \ libc/machine/aarch64/$(am__dirstamp) \
libc/machine/aarch64/$(DEPDIR)/$(am__dirstamp) libc/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
@ -12730,6 +12740,8 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memcpy.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memcpy.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memmove-stub.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memmove-stub.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memmove.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memmove.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-rawmemchr-stub.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(DEPDIR)/libc_a-rawmemchr-stub.Po@am__quote@
@ -16711,6 +16723,20 @@ libc/machine/aarch64/libc_a-memmove.obj: libc/machine/aarch64/memmove.S
@AMDEP_TRUE@@am__fastdepCCAS_FALSE@ DEPDIR=$(DEPDIR) $(CCASDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @AMDEP_TRUE@@am__fastdepCCAS_FALSE@ DEPDIR=$(DEPDIR) $(CCASDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCCAS_FALSE@ $(AM_V_CPPAS@am__nodep@)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -c -o libc/machine/aarch64/libc_a-memmove.obj `if test -f 'libc/machine/aarch64/memmove.S'; then $(CYGPATH_W) 'libc/machine/aarch64/memmove.S'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memmove.S'; fi` @am__fastdepCCAS_FALSE@ $(AM_V_CPPAS@am__nodep@)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -c -o libc/machine/aarch64/libc_a-memmove.obj `if test -f 'libc/machine/aarch64/memmove.S'; then $(CYGPATH_W) 'libc/machine/aarch64/memmove.S'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memmove.S'; fi`
libc/machine/aarch64/libc_a-memrchr.o: libc/machine/aarch64/memrchr.S
@am__fastdepCCAS_TRUE@ $(AM_V_CPPAS)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -MT libc/machine/aarch64/libc_a-memrchr.o -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Tpo -c -o libc/machine/aarch64/libc_a-memrchr.o `test -f 'libc/machine/aarch64/memrchr.S' || echo '$(srcdir)/'`libc/machine/aarch64/memrchr.S
@am__fastdepCCAS_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Po
@AMDEP_TRUE@@am__fastdepCCAS_FALSE@ $(AM_V_CPPAS)source='libc/machine/aarch64/memrchr.S' object='libc/machine/aarch64/libc_a-memrchr.o' libtool=no @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCCAS_FALSE@ DEPDIR=$(DEPDIR) $(CCASDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCCAS_FALSE@ $(AM_V_CPPAS@am__nodep@)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -c -o libc/machine/aarch64/libc_a-memrchr.o `test -f 'libc/machine/aarch64/memrchr.S' || echo '$(srcdir)/'`libc/machine/aarch64/memrchr.S
libc/machine/aarch64/libc_a-memrchr.obj: libc/machine/aarch64/memrchr.S
@am__fastdepCCAS_TRUE@ $(AM_V_CPPAS)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -MT libc/machine/aarch64/libc_a-memrchr.obj -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Tpo -c -o libc/machine/aarch64/libc_a-memrchr.obj `if test -f 'libc/machine/aarch64/memrchr.S'; then $(CYGPATH_W) 'libc/machine/aarch64/memrchr.S'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memrchr.S'; fi`
@am__fastdepCCAS_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr.Po
@AMDEP_TRUE@@am__fastdepCCAS_FALSE@ $(AM_V_CPPAS)source='libc/machine/aarch64/memrchr.S' object='libc/machine/aarch64/libc_a-memrchr.obj' libtool=no @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCCAS_FALSE@ DEPDIR=$(DEPDIR) $(CCASDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCCAS_FALSE@ $(AM_V_CPPAS@am__nodep@)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -c -o libc/machine/aarch64/libc_a-memrchr.obj `if test -f 'libc/machine/aarch64/memrchr.S'; then $(CYGPATH_W) 'libc/machine/aarch64/memrchr.S'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memrchr.S'; fi`
libc/machine/aarch64/libc_a-memset.o: libc/machine/aarch64/memset.S libc/machine/aarch64/libc_a-memset.o: libc/machine/aarch64/memset.S
@am__fastdepCCAS_TRUE@ $(AM_V_CPPAS)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -MT libc/machine/aarch64/libc_a-memset.o -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Tpo -c -o libc/machine/aarch64/libc_a-memset.o `test -f 'libc/machine/aarch64/memset.S' || echo '$(srcdir)/'`libc/machine/aarch64/memset.S @am__fastdepCCAS_TRUE@ $(AM_V_CPPAS)$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CCASFLAGS) $(CCASFLAGS) -MT libc/machine/aarch64/libc_a-memset.o -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Tpo -c -o libc/machine/aarch64/libc_a-memset.o `test -f 'libc/machine/aarch64/memset.S' || echo '$(srcdir)/'`libc/machine/aarch64/memset.S
@am__fastdepCCAS_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Po @am__fastdepCCAS_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memset.Po
@ -32981,6 +33007,20 @@ libc/machine/aarch64/libc_a-memmove-stub.obj: libc/machine/aarch64/memmove-stub.
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/aarch64/libc_a-memmove-stub.obj `if test -f 'libc/machine/aarch64/memmove-stub.c'; then $(CYGPATH_W) 'libc/machine/aarch64/memmove-stub.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memmove-stub.c'; fi` @am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/aarch64/libc_a-memmove-stub.obj `if test -f 'libc/machine/aarch64/memmove-stub.c'; then $(CYGPATH_W) 'libc/machine/aarch64/memmove-stub.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memmove-stub.c'; fi`
libc/machine/aarch64/libc_a-memrchr-stub.o: libc/machine/aarch64/memrchr-stub.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/aarch64/libc_a-memrchr-stub.o -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Tpo -c -o libc/machine/aarch64/libc_a-memrchr-stub.o `test -f 'libc/machine/aarch64/memrchr-stub.c' || echo '$(srcdir)/'`libc/machine/aarch64/memrchr-stub.c
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Po
@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='libc/machine/aarch64/memrchr-stub.c' object='libc/machine/aarch64/libc_a-memrchr-stub.o' libtool=no @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/aarch64/libc_a-memrchr-stub.o `test -f 'libc/machine/aarch64/memrchr-stub.c' || echo '$(srcdir)/'`libc/machine/aarch64/memrchr-stub.c
libc/machine/aarch64/libc_a-memrchr-stub.obj: libc/machine/aarch64/memrchr-stub.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/aarch64/libc_a-memrchr-stub.obj -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Tpo -c -o libc/machine/aarch64/libc_a-memrchr-stub.obj `if test -f 'libc/machine/aarch64/memrchr-stub.c'; then $(CYGPATH_W) 'libc/machine/aarch64/memrchr-stub.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memrchr-stub.c'; fi`
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memrchr-stub.Po
@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='libc/machine/aarch64/memrchr-stub.c' object='libc/machine/aarch64/libc_a-memrchr-stub.obj' libtool=no @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/aarch64/libc_a-memrchr-stub.obj `if test -f 'libc/machine/aarch64/memrchr-stub.c'; then $(CYGPATH_W) 'libc/machine/aarch64/memrchr-stub.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/aarch64/memrchr-stub.c'; fi`
libc/machine/aarch64/libc_a-memset-stub.o: libc/machine/aarch64/memset-stub.c libc/machine/aarch64/libc_a-memset-stub.o: libc/machine/aarch64/memset-stub.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/aarch64/libc_a-memset-stub.o -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Tpo -c -o libc/machine/aarch64/libc_a-memset-stub.o `test -f 'libc/machine/aarch64/memset-stub.c' || echo '$(srcdir)/'`libc/machine/aarch64/memset-stub.c @am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/aarch64/libc_a-memset-stub.o -MD -MP -MF libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Tpo -c -o libc/machine/aarch64/libc_a-memset-stub.o `test -f 'libc/machine/aarch64/memset-stub.c' || echo '$(srcdir)/'`libc/machine/aarch64/memset-stub.c
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Po @am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Tpo libc/machine/aarch64/$(DEPDIR)/libc_a-memset-stub.Po

2
newlib/libc/machine/aarch64/Makefile.inc
View File

@ -7,6 +7,8 @@ libc_a_SOURCES += \
%D%/memcpy.S \ %D%/memcpy.S \
%D%/memmove-stub.c \ %D%/memmove-stub.c \
%D%/memmove.S \ %D%/memmove.S \
%D%/memrchr-stub.c \
%D%/memrchr.S \
%D%/memset-stub.c \ %D%/memset-stub.c \
%D%/memset.S \ %D%/memset.S \
%D%/rawmemchr.S \ %D%/rawmemchr.S \

11
newlib/libc/machine/aarch64/memrchr-stub.c Normal file
View File

@ -0,0 +1,11 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (C) 2023 embedded brains GmbH & Co. KG
*/
#if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED)
#include "../../string/memrchr.c"
#else
/* See memrchr.S */
#endif

115
newlib/libc/machine/aarch64/memrchr.S Normal file
View File

@ -0,0 +1,115 @@
/*
* memrchr - find last character in a memory zone.
*
* Copyright (c) 2020-2022, Arm Limited.
* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
*/
/* Assumptions:
*
* ARMv8-a, AArch64, Advanced SIMD.
* MTE compatible.
*/
#if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED)
/* See memrchr-stub.c */
#else
#include "asmdefs.h"
#define srcin x0
#define chrin w1
#define cntin x2
#define result x0
#define src x3
#define cntrem x4
#define synd x5
#define shift x6
#define tmp x7
#define end x8
#define endm1 x9
#define vrepchr v0
#define qdata q1
#define vdata v1
#define vhas_chr v2
#define vend v3
#define dend d3
/*
Core algorithm:
For each 16-byte chunk we calculate a 64-bit nibble mask value with four bits
per byte. We take 4 bits of every comparison byte with shift right and narrow
by 4 instruction. Since the bits in the nibble mask reflect the order in
which things occur in the original string, counting leading zeros identifies
exactly which byte matched. */
ENTRY (memrchr)
PTR_ARG (0)
add end, srcin, cntin
sub endm1, end, 1
bic src, endm1, 15
cbz cntin, L(nomatch)
ld1 {vdata.16b}, [src]
dup vrepchr.16b, chrin
cmeq vhas_chr.16b, vdata.16b, vrepchr.16b
neg shift, end, lsl 2
shrn vend.8b, vhas_chr.8h, 4 /* 128->64 */
fmov synd, dend
lsl synd, synd, shift
cbz synd, L(start_loop)
clz synd, synd
sub result, endm1, synd, lsr 2
cmp cntin, synd, lsr 2
csel result, result, xzr, hi
ret
nop
L(start_loop):
subs cntrem, src, srcin
b.ls L(nomatch)
/* Make sure that it won't overread by a 16-byte chunk */
sub cntrem, cntrem, 1
tbz cntrem, 4, L(loop32_2)
add src, src, 16
.p2align 5
L(loop32):
ldr qdata, [src, -32]!
cmeq vhas_chr.16b, vdata.16b, vrepchr.16b
umaxp vend.16b, vhas_chr.16b, vhas_chr.16b /* 128->64 */
fmov synd, dend
cbnz synd, L(end)
L(loop32_2):
ldr qdata, [src, -16]
subs cntrem, cntrem, 32
cmeq vhas_chr.16b, vdata.16b, vrepchr.16b
b.lo L(end_2)
umaxp vend.16b, vhas_chr.16b, vhas_chr.16b /* 128->64 */
fmov synd, dend
cbz synd, L(loop32)
L(end_2):
sub src, src, 16
L(end):
shrn vend.8b, vhas_chr.8h, 4 /* 128->64 */
fmov synd, dend
add tmp, src, 15
#ifdef __AARCH64EB__
rbit synd, synd
#endif
clz synd, synd
sub tmp, tmp, synd, lsr 2
cmp tmp, srcin
csel result, tmp, xzr, hs
ret
L(nomatch):
mov result, 0
ret
END (memrchr)
#endif