This commit was manufactured by cvs2svn to create tag 'cygwin-cygwin-1_7_19-release

1_7_19-release'.

Sprout from cygwin-64bit-premerge-branch 2013-04-22 17:11:23 UTC cvs2svn 'This commit was manufactured by cvs2svn to create branch 'cygwin-64bit-'
Cherrypick from master 2013-06-05 07:57:39 UTC Corinna Vinschen <corinna@vinschen.de> '	* faq-programming.xml: Convert url to refer to new flat faq.html file.':
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    winsup/utils/utils.sgml

1 files changed, 32 insertions, 618 deletions

diff --git a/newlib/libc/machine/arm/memcpy.S b/newlib/libc/machine/arm/memcpy.S
index bc54bb3f5..734a19776 100644
--- a/newlib/libc/machine/arm/memcpy.S
+++ b/newlib/libc/machine/arm/memcpy.S
@@ -1,625 +1,39 @@
-/* Copyright (c) 2013, Linaro Limited
-   All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions
-   are met:
-
-      * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-
-      * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-
-      * Neither the name of Linaro Limited nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-   This memcpy routine is optimised for Cortex-A15 cores and takes advantage
-   of VFP or NEON when built with the appropriate flags.
-
-   Assumptions:
-
-    ARMv6 (ARMv7-a if using Neon)
-    ARM state
-    Unaligned accesses
-    LDRD/STRD support unaligned word accesses
-
+/*
+ * Copyright (c) 2013 ARM Ltd
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the company may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#if (defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED) || \
-     (!(defined (__ARM_ARCH_7A__) && defined (__ARM_FEATURE_UNALIGNED))))
-
+#if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED)
         /* Do nothing here. See memcpy-stub.c in the same directory. */
+#elif defined (__ARM_ARCH_7A__) && defined (__ARM_FEATURE_UNALIGNED)
+#include "memcpy-armv7a.S"
 
-#else
-
-	.syntax unified
-	/* This implementation requires ARM state.  */
-	.arm
-
-#ifdef __ARM_NEON__
-
-	.fpu	neon
-	.arch	armv7-a
-# define FRAME_SIZE	4
-# define USE_VFP
-# define USE_NEON
-
-#elif !defined (__SOFTFP__)
-
-	.arch	armv6
-	.fpu	vfpv2
-# define FRAME_SIZE	32
-# define USE_VFP
-
-#else
-	.arch	armv6
-# define FRAME_SIZE    32
-
-#endif
+#elif defined (__ARM_ARCH_7M__) || defined (__ARM_ARCH_7EM__)
+#include "memcpy-armv7m.S"
 
-/* Old versions of GAS incorrectly implement the NEON align semantics.  */
-#ifdef BROKEN_ASM_NEON_ALIGN
-#define ALIGN(addr, align) addr,:align
 #else
-#define ALIGN(addr, align) addr:align
-#endif
-
-#define PC_OFFSET	8	/* PC pipeline compensation.  */
-#define INSN_SIZE	4
-
-/* Call parameters.  */
-#define dstin	r0
-#define src	r1
-#define count	r2
-
-/* Locals.  */
-#define tmp1	r3
-#define dst	ip
-#define tmp2	r10
-
-#ifndef USE_NEON
-/* For bulk copies using GP registers.  */
-#define	A_l	r2		/* Call-clobbered.  */
-#define	A_h	r3		/* Call-clobbered.  */
-#define	B_l	r4
-#define	B_h	r5
-#define	C_l	r6
-#define	C_h	r7
-#define	D_l	r8
-#define	D_h	r9
-#endif
-
-/* Number of lines ahead to pre-fetch data.  If you change this the code
-   below will need adjustment to compensate.  */
-
-#define prefetch_lines	5
-
-#ifdef USE_VFP
-	.macro	cpy_line_vfp vreg, base
-	vstr	\vreg, [dst, #\base]
-	vldr	\vreg, [src, #\base]
-	vstr	d0, [dst, #\base + 8]
-	vldr	d0, [src, #\base + 8]
-	vstr	d1, [dst, #\base + 16]
-	vldr	d1, [src, #\base + 16]
-	vstr	d2, [dst, #\base + 24]
-	vldr	d2, [src, #\base + 24]
-	vstr	\vreg, [dst, #\base + 32]
-	vldr	\vreg, [src, #\base + prefetch_lines * 64 - 32]
-	vstr	d0, [dst, #\base + 40]
-	vldr	d0, [src, #\base + 40]
-	vstr	d1, [dst, #\base + 48]
-	vldr	d1, [src, #\base + 48]
-	vstr	d2, [dst, #\base + 56]
-	vldr	d2, [src, #\base + 56]
-	.endm
-
-	.macro	cpy_tail_vfp vreg, base
-	vstr	\vreg, [dst, #\base]
-	vldr	\vreg, [src, #\base]
-	vstr	d0, [dst, #\base + 8]
-	vldr	d0, [src, #\base + 8]
-	vstr	d1, [dst, #\base + 16]
-	vldr	d1, [src, #\base + 16]
-	vstr	d2, [dst, #\base + 24]
-	vldr	d2, [src, #\base + 24]
-	vstr	\vreg, [dst, #\base + 32]
-	vstr	d0, [dst, #\base + 40]
-	vldr	d0, [src, #\base + 40]
-	vstr	d1, [dst, #\base + 48]
-	vldr	d1, [src, #\base + 48]
-	vstr	d2, [dst, #\base + 56]
-	vldr	d2, [src, #\base + 56]
-	.endm
-#endif
-
-	.macro def_fn f p2align=0
-	.text
-	.p2align \p2align
-	.global \f
-	.type \f, %function
-\f:
-	.endm
-
-def_fn memcpy p2align=6
-
-	mov	dst, dstin	/* Preserve dstin, we need to return it.  */
-	cmp	count, #64
-	bge	.Lcpy_not_short
-	/* Deal with small copies quickly by dropping straight into the
-	   exit block.  */
-
-.Ltail63unaligned:
-#ifdef USE_NEON
-	and	tmp1, count, #0x38
-	rsb	tmp1, tmp1, #(56 - PC_OFFSET + INSN_SIZE)
-	add	pc, pc, tmp1
-	vld1.8	{d0}, [src]!	/* 14 words to go.  */
-	vst1.8	{d0}, [dst]!
-	vld1.8	{d0}, [src]!	/* 12 words to go.  */
-	vst1.8	{d0}, [dst]!
-	vld1.8	{d0}, [src]!	/* 10 words to go.  */
-	vst1.8	{d0}, [dst]!
-	vld1.8	{d0}, [src]!	/* 8 words to go.  */
-	vst1.8	{d0}, [dst]!
-	vld1.8	{d0}, [src]!	/* 6 words to go.  */
-	vst1.8	{d0}, [dst]!
-	vld1.8	{d0}, [src]!	/* 4 words to go.  */
-	vst1.8	{d0}, [dst]!
-	vld1.8	{d0}, [src]!	/* 2 words to go.  */
-	vst1.8	{d0}, [dst]!
-
-	tst	count, #4
-	ldrne	tmp1, [src], #4
-	strne	tmp1, [dst], #4
-#else
-	/* Copy up to 15 full words of data.  May not be aligned.  */
-	/* Cannot use VFP for unaligned data.  */
-	and	tmp1, count, #0x3c
-	add	dst, dst, tmp1
-	add	src, src, tmp1
-	rsb	tmp1, tmp1, #(60 - PC_OFFSET/2 + INSN_SIZE/2)
-	/* Jump directly into the sequence below at the correct offset.  */
-	add	pc, pc, tmp1, lsl #1
-
-	ldr	tmp1, [src, #-60]	/* 15 words to go.  */
-	str	tmp1, [dst, #-60]
-
-	ldr	tmp1, [src, #-56]	/* 14 words to go.  */
-	str	tmp1, [dst, #-56]
-	ldr	tmp1, [src, #-52]
-	str	tmp1, [dst, #-52]
-
-	ldr	tmp1, [src, #-48]	/* 12 words to go.  */
-	str	tmp1, [dst, #-48]
-	ldr	tmp1, [src, #-44]
-	str	tmp1, [dst, #-44]
-
-	ldr	tmp1, [src, #-40]	/* 10 words to go.  */
-	str	tmp1, [dst, #-40]
-	ldr	tmp1, [src, #-36]
-	str	tmp1, [dst, #-36]
-
-	ldr	tmp1, [src, #-32]	/* 8 words to go.  */
-	str	tmp1, [dst, #-32]
-	ldr	tmp1, [src, #-28]
-	str	tmp1, [dst, #-28]
-
-	ldr	tmp1, [src, #-24]	/* 6 words to go.  */
-	str	tmp1, [dst, #-24]
-	ldr	tmp1, [src, #-20]
-	str	tmp1, [dst, #-20]
-
-	ldr	tmp1, [src, #-16]	/* 4 words to go.  */
-	str	tmp1, [dst, #-16]
-	ldr	tmp1, [src, #-12]
-	str	tmp1, [dst, #-12]
-
-	ldr	tmp1, [src, #-8]	/* 2 words to go.  */
-	str	tmp1, [dst, #-8]
-	ldr	tmp1, [src, #-4]
-	str	tmp1, [dst, #-4]
-#endif
-
-	lsls	count, count, #31
-	ldrhcs	tmp1, [src], #2
-	ldrbne	src, [src]		/* Src is dead, use as a scratch.  */
-	strhcs	tmp1, [dst], #2
-	strbne	src, [dst]
-	bx	lr
-
-.Lcpy_not_short:
-	/* At least 64 bytes to copy, but don't know the alignment yet.  */
-	str	tmp2, [sp, #-FRAME_SIZE]!
-	and	tmp2, src, #3
-	and	tmp1, dst, #3
-	cmp	tmp1, tmp2
-	bne	.Lcpy_notaligned
-
-#ifdef USE_VFP
-	/* Magic dust alert!  Force VFP on Cortex-A9.  Experiments show
-	   that the FP pipeline is much better at streaming loads and
-	   stores.  This is outside the critical loop.  */
-	vmov.f32	s0, s0
-#endif
-
-	/* SRC and DST have the same mutual 32-bit alignment, but we may
-	   still need to pre-copy some bytes to get to natural alignment.
-	   We bring DST into full 64-bit alignment.  */
-	lsls	tmp2, dst, #29
-	beq	1f
-	rsbs	tmp2, tmp2, #0
-	sub	count, count, tmp2, lsr #29
-	ldrmi	tmp1, [src], #4
-	strmi	tmp1, [dst], #4
-	lsls	tmp2, tmp2, #2
-	ldrhcs	tmp1, [src], #2
-	ldrbne	tmp2, [src], #1
-	strhcs	tmp1, [dst], #2
-	strbne	tmp2, [dst], #1
-
-1:
-	subs	tmp2, count, #64	/* Use tmp2 for count.  */
-	blt	.Ltail63aligned
-
-	cmp	tmp2, #512
-	bge	.Lcpy_body_long
-
-.Lcpy_body_medium:			/* Count in tmp2.  */
-#ifdef USE_VFP
-1:
-	vldr	d0, [src, #0]
-	subs	tmp2, tmp2, #64
-	vldr	d1, [src, #8]
-	vstr	d0, [dst, #0]
-	vldr	d0, [src, #16]
-	vstr	d1, [dst, #8]
-	vldr	d1, [src, #24]
-	vstr	d0, [dst, #16]
-	vldr	d0, [src, #32]
-	vstr	d1, [dst, #24]
-	vldr	d1, [src, #40]
-	vstr	d0, [dst, #32]
-	vldr	d0, [src, #48]
-	vstr	d1, [dst, #40]
-	vldr	d1, [src, #56]
-	vstr	d0, [dst, #48]
-	add	src, src, #64
-	vstr	d1, [dst, #56]
-	add	dst, dst, #64
-	bge	1b
-	tst	tmp2, #0x3f
-	beq	.Ldone
-
-.Ltail63aligned:			/* Count in tmp2.  */
-	and	tmp1, tmp2, #0x38
-	add	dst, dst, tmp1
-	add	src, src, tmp1
-	rsb	tmp1, tmp1, #(56 - PC_OFFSET + INSN_SIZE)
-	add	pc, pc, tmp1
-
-	vldr	d0, [src, #-56]	/* 14 words to go.  */
-	vstr	d0, [dst, #-56]
-	vldr	d0, [src, #-48]	/* 12 words to go.  */
-	vstr	d0, [dst, #-48]
-	vldr	d0, [src, #-40]	/* 10 words to go.  */
-	vstr	d0, [dst, #-40]
-	vldr	d0, [src, #-32]	/* 8 words to go.  */
-	vstr	d0, [dst, #-32]
-	vldr	d0, [src, #-24]	/* 6 words to go.  */
-	vstr	d0, [dst, #-24]
-	vldr	d0, [src, #-16]	/* 4 words to go.  */
-	vstr	d0, [dst, #-16]
-	vldr	d0, [src, #-8]	/* 2 words to go.  */
-	vstr	d0, [dst, #-8]
-#else
-	sub	src, src, #8
-	sub	dst, dst, #8
-1:
-	ldrd	A_l, A_h, [src, #8]
-	strd	A_l, A_h, [dst, #8]
-	ldrd	A_l, A_h, [src, #16]
-	strd	A_l, A_h, [dst, #16]
-	ldrd	A_l, A_h, [src, #24]
-	strd	A_l, A_h, [dst, #24]
-	ldrd	A_l, A_h, [src, #32]
-	strd	A_l, A_h, [dst, #32]
-	ldrd	A_l, A_h, [src, #40]
-	strd	A_l, A_h, [dst, #40]
-	ldrd	A_l, A_h, [src, #48]
-	strd	A_l, A_h, [dst, #48]
-	ldrd	A_l, A_h, [src, #56]
-	strd	A_l, A_h, [dst, #56]
-	ldrd	A_l, A_h, [src, #64]!
-	strd	A_l, A_h, [dst, #64]!
-	subs	tmp2, tmp2, #64
-	bge	1b
-	tst	tmp2, #0x3f
-	bne	1f
-	ldr	tmp2,[sp], #FRAME_SIZE
-	bx	lr
-1:
-	add	src, src, #8
-	add	dst, dst, #8
-
-.Ltail63aligned:			/* Count in tmp2.  */
-	/* Copy up to 7 d-words of data.  Similar to Ltail63unaligned, but
-	   we know that the src and dest are 32-bit aligned so we can use
-	   LDRD/STRD to improve efficiency.  */
-	/* TMP2 is now negative, but we don't care about that.  The bottom
-	   six bits still tell us how many bytes are left to copy.  */
-
-	and	tmp1, tmp2, #0x38
-	add	dst, dst, tmp1
-	add	src, src, tmp1
-	rsb	tmp1, tmp1, #(56 - PC_OFFSET + INSN_SIZE)
-	add	pc, pc, tmp1
-	ldrd	A_l, A_h, [src, #-56]	/* 14 words to go.  */
-	strd	A_l, A_h, [dst, #-56]
-	ldrd	A_l, A_h, [src, #-48]	/* 12 words to go.  */
-	strd	A_l, A_h, [dst, #-48]
-	ldrd	A_l, A_h, [src, #-40]	/* 10 words to go.  */
-	strd	A_l, A_h, [dst, #-40]
-	ldrd	A_l, A_h, [src, #-32]	/* 8 words to go.  */
-	strd	A_l, A_h, [dst, #-32]
-	ldrd	A_l, A_h, [src, #-24]	/* 6 words to go.  */
-	strd	A_l, A_h, [dst, #-24]
-	ldrd	A_l, A_h, [src, #-16]	/* 4 words to go.  */
-	strd	A_l, A_h, [dst, #-16]
-	ldrd	A_l, A_h, [src, #-8]	/* 2 words to go.  */
-	strd	A_l, A_h, [dst, #-8]
-
-#endif
-	tst	tmp2, #4
-	ldrne	tmp1, [src], #4
-	strne	tmp1, [dst], #4
-	lsls	tmp2, tmp2, #31		/* Count (tmp2) now dead. */
-	ldrhcs	tmp1, [src], #2
-	ldrbne	tmp2, [src]
-	strhcs	tmp1, [dst], #2
-	strbne	tmp2, [dst]
-
-.Ldone:
-	ldr	tmp2, [sp], #FRAME_SIZE
-	bx	lr
-
-.Lcpy_body_long:			/* Count in tmp2.  */
-
-	/* Long copy.  We know that there's at least (prefetch_lines * 64)
-	   bytes to go.  */
-#ifdef USE_VFP
-	/* Don't use PLD.  Instead, read some data in advance of the current
-	   copy position into a register.  This should act like a PLD
-	   operation but we won't have to repeat the transfer.  */
-
-	vldr	d3, [src, #0]
-	vldr	d4, [src, #64]
-	vldr	d5, [src, #128]
-	vldr	d6, [src, #192]
-	vldr	d7, [src, #256]
-
-	vldr	d0, [src, #8]
-	vldr	d1, [src, #16]
-	vldr	d2, [src, #24]
-	add	src, src, #32
-
-	subs	tmp2, tmp2, #prefetch_lines * 64 * 2
-	blt	2f
-1:
-	cpy_line_vfp	d3, 0
-	cpy_line_vfp	d4, 64
-	cpy_line_vfp	d5, 128
-	add	dst, dst, #3 * 64
-	add	src, src, #3 * 64
-	cpy_line_vfp	d6, 0
-	cpy_line_vfp	d7, 64
-	add	dst, dst, #2 * 64
-	add	src, src, #2 * 64
-	subs	tmp2, tmp2, #prefetch_lines * 64
-	bge	1b
-
-2:
-	cpy_tail_vfp	d3, 0
-	cpy_tail_vfp	d4, 64
-	cpy_tail_vfp	d5, 128
-	add	src, src, #3 * 64
-	add	dst, dst, #3 * 64
-	cpy_tail_vfp	d6, 0
-	vstr	d7, [dst, #64]
-	vldr	d7, [src, #64]
-	vstr	d0, [dst, #64 + 8]
-	vldr	d0, [src, #64 + 8]
-	vstr	d1, [dst, #64 + 16]
-	vldr	d1, [src, #64 + 16]
-	vstr	d2, [dst, #64 + 24]
-	vldr	d2, [src, #64 + 24]
-	vstr	d7, [dst, #64 + 32]
-	add	src, src, #96
-	vstr	d0, [dst, #64 + 40]
-	vstr	d1, [dst, #64 + 48]
-	vstr	d2, [dst, #64 + 56]
-	add	dst, dst, #128
-	add	tmp2, tmp2, #prefetch_lines * 64
-	b	.Lcpy_body_medium
-#else
-	/* Long copy.  Use an SMS style loop to maximize the I/O
-	   bandwidth of the core.  We don't have enough spare registers
-	   to synthesise prefetching, so use PLD operations.  */
-	/* Pre-bias src and dst.  */
-	sub	src, src, #8
-	sub	dst, dst, #8
-	pld	[src, #8]
-	pld	[src, #72]
-	subs	tmp2, tmp2, #64
-	pld	[src, #136]
-	ldrd	A_l, A_h, [src, #8]
-	strd	B_l, B_h, [sp, #8]
-	ldrd	B_l, B_h, [src, #16]
-	strd	C_l, C_h, [sp, #16]
-	ldrd	C_l, C_h, [src, #24]
-	strd	D_l, D_h, [sp, #24]
-	pld	[src, #200]
-	ldrd	D_l, D_h, [src, #32]!
-	b	1f
-	.p2align	6
-2:
-	pld	[src, #232]
-	strd	A_l, A_h, [dst, #40]
-	ldrd	A_l, A_h, [src, #40]
-	strd	B_l, B_h, [dst, #48]
-	ldrd	B_l, B_h, [src, #48]
-	strd	C_l, C_h, [dst, #56]
-	ldrd	C_l, C_h, [src, #56]
-	strd	D_l, D_h, [dst, #64]!
-	ldrd	D_l, D_h, [src, #64]!
-	subs	tmp2, tmp2, #64
-1:
-	strd	A_l, A_h, [dst, #8]
-	ldrd	A_l, A_h, [src, #8]
-	strd	B_l, B_h, [dst, #16]
-	ldrd	B_l, B_h, [src, #16]
-	strd	C_l, C_h, [dst, #24]
-	ldrd	C_l, C_h, [src, #24]
-	strd	D_l, D_h, [dst, #32]
-	ldrd	D_l, D_h, [src, #32]
-	bcs	2b
-	/* Save the remaining bytes and restore the callee-saved regs.  */
-	strd	A_l, A_h, [dst, #40]
-	add	src, src, #40
-	strd	B_l, B_h, [dst, #48]
-	ldrd	B_l, B_h, [sp, #8]
-	strd	C_l, C_h, [dst, #56]
-	ldrd	C_l, C_h, [sp, #16]
-	strd	D_l, D_h, [dst, #64]
-	ldrd	D_l, D_h, [sp, #24]
-	add	dst, dst, #72
-	tst	tmp2, #0x3f
-	bne	.Ltail63aligned
-	ldr	tmp2, [sp], #FRAME_SIZE
-	bx	lr
-#endif
-
-.Lcpy_notaligned:
-	pld	[src]
-	pld	[src, #64]
-	/* There's at least 64 bytes to copy, but there is no mutual
-	   alignment.  */
-	/* Bring DST to 64-bit alignment.  */
-	lsls	tmp2, dst, #29
-	pld	[src, #(2 * 64)]
-	beq	1f
-	rsbs	tmp2, tmp2, #0
-	sub	count, count, tmp2, lsr #29
-	ldrmi	tmp1, [src], #4
-	strmi	tmp1, [dst], #4
-	lsls	tmp2, tmp2, #2
-	ldrbne	tmp1, [src], #1
-	ldrhcs	tmp2, [src], #2
-	strbne	tmp1, [dst], #1
-	strhcs	tmp2, [dst], #2
-1:
-	pld	[src, #(3 * 64)]
-	subs	count, count, #64
-	ldrmi	tmp2, [sp], #FRAME_SIZE
-	bmi	.Ltail63unaligned
-	pld	[src, #(4 * 64)]
-
-#ifdef USE_NEON
-	vld1.8	{d0-d3}, [src]!
-	vld1.8	{d4-d7}, [src]!
-	subs	count, count, #64
-	bmi	2f
-1:
-	pld	[src, #(4 * 64)]
-	vst1.8	{d0-d3}, [ALIGN (dst, 64)]!
-	vld1.8	{d0-d3}, [src]!
-	vst1.8	{d4-d7}, [ALIGN (dst, 64)]!
-	vld1.8	{d4-d7}, [src]!
-	subs	count, count, #64
-	bpl	1b
-2:
-	vst1.8	{d0-d3}, [ALIGN (dst, 64)]!
-	vst1.8	{d4-d7}, [ALIGN (dst, 64)]!
-	ands	count, count, #0x3f
-#else
-	/* Use an SMS style loop to maximize the I/O bandwidth.  */
-	sub	src, src, #4
-	sub	dst, dst, #8
-	subs	tmp2, count, #64	/* Use tmp2 for count.  */
-	ldr	A_l, [src, #4]
-	ldr	A_h, [src, #8]
-	strd	B_l, B_h, [sp, #8]
-	ldr	B_l, [src, #12]
-	ldr	B_h, [src, #16]
-	strd	C_l, C_h, [sp, #16]
-	ldr	C_l, [src, #20]
-	ldr	C_h, [src, #24]
-	strd	D_l, D_h, [sp, #24]
-	ldr	D_l, [src, #28]
-	ldr	D_h, [src, #32]!
-	b	1f
-	.p2align	6
-2:
-	pld	[src, #(5 * 64) - (32 - 4)]
-	strd	A_l, A_h, [dst, #40]
-	ldr	A_l, [src, #36]
-	ldr	A_h, [src, #40]
-	strd	B_l, B_h, [dst, #48]
-	ldr	B_l, [src, #44]
-	ldr	B_h, [src, #48]
-	strd	C_l, C_h, [dst, #56]
-	ldr	C_l, [src, #52]
-	ldr	C_h, [src, #56]
-	strd	D_l, D_h, [dst, #64]!
-	ldr	D_l, [src, #60]
-	ldr	D_h, [src, #64]!
-	subs	tmp2, tmp2, #64
-1:
-	strd	A_l, A_h, [dst, #8]
-	ldr	A_l, [src, #4]
-	ldr	A_h, [src, #8]
-	strd	B_l, B_h, [dst, #16]
-	ldr	B_l, [src, #12]
-	ldr	B_h, [src, #16]
-	strd	C_l, C_h, [dst, #24]
-	ldr	C_l, [src, #20]
-	ldr	C_h, [src, #24]
-	strd	D_l, D_h, [dst, #32]
-	ldr	D_l, [src, #28]
-	ldr	D_h, [src, #32]
-	bcs	2b
-
-	/* Save the remaining bytes and restore the callee-saved regs.  */
-	strd	A_l, A_h, [dst, #40]
-	add	src, src, #36
-	strd	B_l, B_h, [dst, #48]
-	ldrd	B_l, B_h, [sp, #8]
-	strd	C_l, C_h, [dst, #56]
-	ldrd	C_l, C_h, [sp, #16]
-	strd	D_l, D_h, [dst, #64]
-	ldrd	D_l, D_h, [sp, #24]
-	add	dst, dst, #72
-	ands	count, tmp2, #0x3f
+        /* Do nothing here. See memcpy-stub.c in the same directory. */
 #endif
-	ldr	tmp2, [sp], #FRAME_SIZE
-	bne	.Ltail63unaligned
-	bx	lr
-
-	.size	memcpy, . - memcpy
-
-#endif  /* memcpy */