@@ -596,6 +596,8 @@ check_PROGRAMS =
@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.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.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-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-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.$(OBJEXT) \
@HAVE_LIBC_MACHINE_AARCH64_TRUE@ libc/machine/aarch64/libc_a-memset.$(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.$(OBJEXT): \
libc/machine/aarch64/$(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.$(OBJEXT): \
libc/machine/aarch64/$(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-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-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/$(DEPDIR)/libc_a-memset.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/aarch64/$(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@
@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
@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
@@ -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@
@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
@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
@@ -7,6 +7,8 @@ libc_a_SOURCES += \
%D%/memcpy.S \
%D%/memmove-stub.c \
%D%/memmove.S \
+ %D%/memrchr-stub.c \
+ %D%/memrchr.S \
%D%/memset-stub.c \
%D%/memset.S \
%D%/rawmemchr.S \
new file mode 100644
@@ -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
new file mode 100644
@@ -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