Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpn/x86/copyd.asm

@@ -0,0 +1,91 @@
+dnl  x86 mpn_copyd -- copy limb vector, decrementing.
+
+dnl  Copyright 1999-2002 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+dnl
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of either:
+dnl
+dnl    * the GNU Lesser General Public License as published by the Free
+dnl      Software Foundation; either version 3 of the License, or (at your
+dnl      option) any later version.
+dnl
+dnl  or
+dnl
+dnl    * the GNU General Public License as published by the Free Software
+dnl      Foundation; either version 2 of the License, or (at your option) any
+dnl      later version.
+dnl
+dnl  or both in parallel, as here.
+dnl
+dnl  The GNU MP Library is distributed in the hope that it will be useful, but
+dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+dnl  for more details.
+dnl
+dnl  You should have received copies of the GNU General Public License and the
+dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
+dnl  see https://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+
+C     cycles/limb  startup (approx)
+C P5	  1.0	      40
+C P6	  2.4	      70
+C K6	  1.0	      55
+C K7	  1.3	      75
+C P4	  2.6	     175
+C
+C (Startup time includes some function call overheads.)
+
+
+C void mpn_copyd (mp_ptr dst, mp_srcptr src, mp_size_t size);
+C
+C Copy src,size to dst,size, working from high to low addresses.
+C
+C The code here is very generic and can be expected to be reasonable on all
+C the x86 family.
+
+defframe(PARAM_SIZE,12)
+defframe(PARAM_SRC, 8)
+defframe(PARAM_DST, 4)
+deflit(`FRAME',0)
+
+	TEXT
+	ALIGN(32)
+
+PROLOGUE(mpn_copyd)
+	C eax	saved esi
+	C ebx
+	C ecx	counter
+	C edx	saved edi
+	C esi	src
+	C edi	dst
+	C ebp
+
+	movl	PARAM_SIZE, %ecx
+	movl	%esi, %eax
+
+	movl	PARAM_SRC, %esi
+	movl	%edi, %edx
+
+	movl	PARAM_DST, %edi
+	leal	-4(%esi,%ecx,4), %esi
+
+	leal	-4(%edi,%ecx,4), %edi
+
+	std
+
+	rep
+	movsl
+
+	cld
+
+	movl	%eax, %esi
+	movl	%edx, %edi
+
+	ret
+
+EPILOGUE()