mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-02-18 15:09:32 +08:00
Cygwin: split out x86_64 memset/memcpy functions
move the assembler memset and memcpy functions into their own assembler files. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
parent
4d6c88e030
commit
3e13d93554
@ -53,6 +53,12 @@ TEST_LIB_NAME=libcygwin0.a
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#
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# These objects are included directly into the import library
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if TARGET_X86_64
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TARGET_FILES= \
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x86_64/memcpy.s \
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x86_64/memset.s
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endif
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LIB_FILES= \
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lib/_cygwin_crt0_common.cc \
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lib/atexit.c \
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@ -361,6 +367,7 @@ liblib_a_SOURCES= \
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$(LIB_FILES)
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libdll_a_SOURCES= \
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$(TARGET_FILES) \
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$(DLL_FILES) \
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$(REGEX_FILES) \
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$(MALLOC_FILES) \
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@ -705,213 +705,6 @@ err:
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return thread;
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}
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#ifdef __x86_64__
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/* These functions are almost verbatim FreeBSD code (even if the header of
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one file mentiones NetBSD), just wrapped in the minimum required code to
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make them work with the MS AMD64 ABI.
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See FreeBSD src/lib/libc/amd64/string/memset.S
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and FreeBSD src/lib/libc/amd64/string/bcopy.S */
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asm (" \n\
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/* \n\
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* Written by J.T. Conklin <jtc@NetBSD.org>. \n\
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* Public domain. \n\
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* Adapted for NetBSD/x86_64 by \n\
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* Frank van der Linden <fvdl@wasabisystems.com> \n\
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*/ \n\
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\n\
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.globl memset \n\
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.seh_proc memset \n\
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memset: \n\
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movq %rsi,8(%rsp) \n\
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movq %rdi,16(%rsp) \n\
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.seh_endprologue \n\
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movq %rcx,%rdi \n\
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movq %rdx,%rsi \n\
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movq %r8,%rdx \n\
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\n\
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movq %rsi,%rax \n\
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andq $0xff,%rax \n\
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movq %rdx,%rcx \n\
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movq %rdi,%r11 \n\
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\n\
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cld /* set fill direction forward */ \n\
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\n\
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/* if the string is too short, it's really not worth the \n\
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* overhead of aligning to word boundries, etc. So we jump to \n\
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* a plain unaligned set. */ \n\
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cmpq $0x0f,%rcx \n\
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jle L1 \n\
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\n\
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movb %al,%ah /* copy char to all bytes in word */\n\
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movl %eax,%edx \n\
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sall $16,%eax \n\
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orl %edx,%eax \n\
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\n\
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movl %eax,%edx \n\
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salq $32,%rax \n\
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orq %rdx,%rax \n\
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\n\
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movq %rdi,%rdx /* compute misalignment */ \n\
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negq %rdx \n\
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andq $7,%rdx \n\
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movq %rcx,%r8 \n\
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subq %rdx,%r8 \n\
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\n\
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movq %rdx,%rcx /* set until word aligned */ \n\
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rep \n\
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stosb \n\
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\n\
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movq %r8,%rcx \n\
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shrq $3,%rcx /* set by words */ \n\
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rep \n\
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stosq \n\
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\n\
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movq %r8,%rcx /* set remainder by bytes */ \n\
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andq $7,%rcx \n\
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L1: rep \n\
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stosb \n\
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movq %r11,%rax \n\
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\n\
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movq 8(%rsp),%rsi \n\
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movq 16(%rsp),%rdi \n\
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ret \n\
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.seh_endproc \n\
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");
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asm (" \n\
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/*- \n\
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* Copyright (c) 1990 The Regents of the University of California. \n\
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* All rights reserved. \n\
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* \n\
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* This code is derived from locore.s. \n\
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* \n\
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* Redistribution and use in source and binary forms, with or without \n\
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* modification, are permitted provided that the following conditions \n\
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* are met: \n\
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* 1. Redistributions of source code must retain the above copyright \n\
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* notice, this list of conditions and the following disclaimer. \n\
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* 2. Redistributions in binary form must reproduce the above copyright \n\
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* notice, this list of conditions and the following disclaimer in \n\
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* the documentation and/or other materials provided with the \n\
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* distribution. \n\
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* 3. Neither the name of the University nor the names of its \n\
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* contributors may be used to endorse or promote products derived \n\
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* from this software without specific prior written permission. \n\
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* \n\
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' \n\
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,\n\
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A \n\
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR \n\
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,\n\
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, \n\
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR \n\
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY \n\
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT \n\
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE \n\
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH \n\
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* DAMAGE. \n\
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*/ \n\
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\n\
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.seh_proc _memcpy \n\
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_memcpy: \n\
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movq %rsi,8(%rsp) \n\
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movq %rdi,16(%rsp) \n\
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.seh_endprologue \n\
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movq %rcx,%rdi \n\
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movq %rdx,%rsi \n\
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movq %r8,%rdx \n\
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\n\
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movq %rdx,%rcx \n\
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movq %rdi,%r8 \n\
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subq %rsi,%r8 \n\
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cmpq %rcx,%r8 /* overlapping? */ \n\
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jb 1f \n\
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cld /* nope, copy forwards. */ \n\
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shrq $3,%rcx /* copy by words */ \n\
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rep movsq \n\
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movq %rdx,%rcx \n\
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andq $7,%rcx /* any bytes left? */ \n\
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rep movsb \n\
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jmp 2f \n\
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1: \n\
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addq %rcx,%rdi /* copy backwards. */ \n\
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addq %rcx,%rsi \n\
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std \n\
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andq $7,%rcx /* any fractional bytes? */ \n\
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decq %rdi \n\
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decq %rsi \n\
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rep movsb \n\
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movq %rdx,%rcx /* copy remainder by words */ \n\
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shrq $3,%rcx \n\
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subq $7,%rsi \n\
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subq $7,%rdi \n\
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rep movsq \n\
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cld \n\
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2: \n\
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movq 8(%rsp),%rsi \n\
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movq 16(%rsp),%rdi \n\
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ret \n\
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.seh_endproc \n\
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\n\
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.globl memmove \n\
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.seh_proc memmove \n\
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memmove: \n\
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.seh_endprologue \n\
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movq %rcx,%rax /* return dst */ \n\
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jmp _memcpy \n\
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.seh_endproc \n\
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\n\
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.globl memcpy \n\
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.seh_proc memcpy \n\
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memcpy: \n\
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.seh_endprologue \n\
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movq %rcx,%rax /* return dst */ \n\
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jmp _memcpy \n\
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.seh_endproc \n\
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\n\
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.globl mempcpy \n\
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.seh_proc mempcpy \n\
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mempcpy: \n\
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.seh_endprologue \n\
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movq %rcx,%rax /* return dst */ \n\
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addq %r8,%rax /* + n */ \n\
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jmp _memcpy \n\
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.seh_endproc \n\
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\n\
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.globl wmemmove \n\
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.seh_proc wmemmove \n\
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wmemmove: \n\
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.seh_endprologue \n\
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shlq $1,%r8 /* cnt * sizeof (wchar_t) */ \n\
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movq %rcx,%rax /* return dst */ \n\
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jmp _memcpy \n\
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.seh_endproc \n\
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\n\
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.globl wmemcpy \n\
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.seh_proc wmemcpy \n\
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wmemcpy: \n\
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.seh_endprologue \n\
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shlq $1,%r8 /* cnt * sizeof (wchar_t) */ \n\
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movq %rcx,%rax /* return dst */ \n\
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jmp _memcpy \n\
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.seh_endproc \n\
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\n\
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.globl wmempcpy \n\
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.seh_proc wmempcpy \n\
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wmempcpy: \n\
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.seh_endprologue \n\
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shlq $1,%r8 /* cnt * sizeof (wchar_t) */ \n\
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movq %rcx,%rax /* return dst */ \n\
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addq %r8,%rax /* + n */ \n\
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jmp _memcpy \n\
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.seh_endproc \n\
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");
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#else
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#error unimplemented for this target
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#endif
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/* Signal the thread name to any attached debugger
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(See "How to: Set a Thread Name in Native Code"
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131
winsup/cygwin/x86_64/memcpy.s
Normal file
131
winsup/cygwin/x86_64/memcpy.s
Normal file
@ -0,0 +1,131 @@
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/* These functions are almost verbatim FreeBSD code (even if the header of
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one file mentiones NetBSD), just wrapped in the minimum required code to
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make them work under the MS AMD64 ABI.
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See FreeBSD src/lib/libc/amd64/string/bcopy.S */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from locore.s.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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.seh_proc _memcpy
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_memcpy:
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movq %rsi,8(%rsp)
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movq %rdi,16(%rsp)
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.seh_endprologue
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movq %rcx,%rdi
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movq %rdx,%rsi
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movq %r8,%rdx
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movq %rdx,%rcx
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movq %rdi,%r8
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subq %rsi,%r8
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cmpq %rcx,%r8 /* overlapping? */
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jb 1f
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cld /* nope, copy forwards. */
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shrq $3,%rcx /* copy by words */
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rep movsq
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movq %rdx,%rcx
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andq $7,%rcx /* any bytes left? */
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rep movsb
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jmp 2f
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1:
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addq %rcx,%rdi /* copy backwards. */
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addq %rcx,%rsi
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std
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andq $7,%rcx /* any fractional bytes? */
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decq %rdi
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decq %rsi
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rep movsb
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movq %rdx,%rcx /* copy remainder by words */
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shrq $3,%rcx
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subq $7,%rsi
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subq $7,%rdi
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rep movsq
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cld
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2:
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movq 8(%rsp),%rsi
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movq 16(%rsp),%rdi
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ret
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.seh_endproc
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.globl memmove
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.seh_proc memmove
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memmove:
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.seh_endprologue
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movq %rcx,%rax /* return dst */
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jmp _memcpy
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.seh_endproc
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.globl memcpy
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.seh_proc memcpy
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memcpy:
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.seh_endprologue
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movq %rcx,%rax /* return dst */
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jmp _memcpy
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.seh_endproc
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.globl mempcpy
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.seh_proc mempcpy
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mempcpy:
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.seh_endprologue
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movq %rcx,%rax /* return dst */
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addq %r8,%rax /* + n */
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jmp _memcpy
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.seh_endproc
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.globl wmemmove
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.seh_proc wmemmove
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wmemmove:
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.seh_endprologue
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shlq $1,%r8 /* cnt * sizeof (wchar_t) */
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movq %rcx,%rax /* return dst */
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jmp _memcpy
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.seh_endproc
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.globl wmemcpy
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.seh_proc wmemcpy
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wmemcpy:
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.seh_endprologue
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shlq $1,%r8 /* cnt * sizeof (wchar_t) */
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movq %rcx,%rax /* return dst */
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jmp _memcpy
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.seh_endproc
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.globl wmempcpy
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.seh_proc wmempcpy
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wmempcpy:
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.seh_endprologue
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shlq $1,%r8 /* cnt * sizeof (wchar_t) */
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movq %rcx,%rax /* return dst */
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addq %r8,%rax /* + n */
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jmp _memcpy
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.seh_endproc
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69
winsup/cygwin/x86_64/memset.s
Normal file
69
winsup/cygwin/x86_64/memset.s
Normal file
@ -0,0 +1,69 @@
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/* These functions are almost verbatim FreeBSD code (even if the header of
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one file mentiones NetBSD), just wrapped in the minimum required code to
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make them work under the MS AMD64 ABI.
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See FreeBSD src/lib/libc/amd64/string/memset.S */
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/*
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* Written by J.T. Conklin <jtc@NetBSD.org>.
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* Public domain.
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* Adapted for NetBSD/x86_64 by
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* Frank van der Linden <fvdl@wasabisystems.com>
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*/
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.globl memset
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.seh_proc memset
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memset:
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movq %rsi,8(%rsp)
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movq %rdi,16(%rsp)
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.seh_endprologue
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movq %rcx,%rdi
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movq %rdx,%rsi
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movq %r8,%rdx
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movq %rsi,%rax
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andq $0xff,%rax
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movq %rdx,%rcx
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movq %rdi,%r11
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cld /* set fill direction forward */
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/* if the string is too short, it's really not worth the
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* overhead of aligning to word boundries, etc. So we jump to
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* a plain unaligned set. */
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cmpq $0x0f,%rcx
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jle L1
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movb %al,%ah /* copy char to all bytes in word */
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movl %eax,%edx
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sall $16,%eax
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orl %edx,%eax
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movl %eax,%edx
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salq $32,%rax
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orq %rdx,%rax
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movq %rdi,%rdx /* compute misalignment */
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negq %rdx
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andq $7,%rdx
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movq %rcx,%r8
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subq %rdx,%r8
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movq %rdx,%rcx /* set until word aligned */
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rep
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stosb
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movq %r8,%rcx
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shrq $3,%rcx /* set by words */
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rep
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stosq
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movq %r8,%rcx /* set remainder by bytes */
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andq $7,%rcx
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L1: rep
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stosb
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movq %r11,%rax
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movq 8(%rsp),%rsi
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movq 16(%rsp),%rdi
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ret
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.seh_endproc
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