Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpn/powerpc32/darwin.m4

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+divert(-1)
+dnl  m4 macros for Mac OS 32-bit assembly.
+
+dnl  Copyright 2005, 2006 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/.
+
+define(`ASM_START',`')
+
+dnl  Called: PROLOGUE_cpu(GSYM_PREFIX`'foo[,toc])
+dnl          EPILOGUE_cpu(GSYM_PREFIX`'foo)
+dnl
+
+define(`PROLOGUE_cpu',
+m4_assert_numargs_range(1,2)
+`ifelse(`$2',toc,,
+`ifelse(`$2',,,`m4_error(`Unrecognised PROLOGUE parameter')')')dnl
+	.text
+	.globl	$1
+	.align	3
+$1:')
+
+define(`EPILOGUE_cpu',
+m4_assert_numargs(1))
+
+
+dnl  LEA -- Load Effective Address.
+
+define(`LEA',
+m4_assert_numargs(2)
+`ifdef(`PIC',
+`	mflr	r0			C save return address
+	bcl	20, 31, 1f
+1:	mflr	$1
+	addis	$1, $1, ha16($2-1b)
+	la	$1, lo16($2-1b)($1)
+	mtlr	r0			C restore return address
+',`
+	lis	$1, ha16($2)
+	la	$1, lo16($2)($1)
+')')
+
+define(`LEAL',
+m4_assert_numargs(2)
+`LEA($1,$2)')
+
+
+define(`EXTERN',
+m4_assert_numargs(1)
+`dnl')
+
+define(`DEF_OBJECT',
+m4_assert_numargs_range(1,2)
+`	.const
+	ALIGN(ifelse($#,1,2,$2))
+$1:
+')
+
+define(`END_OBJECT',
+m4_assert_numargs(1))
+
+define(`ASM_END', `dnl')
+
+ifdef(`PIC',`
+define(`PIC_SLOW')')
+
+divert