Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/tests/amd64call.asm

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+dnl  AMD64 calling conventions checking.
+
+dnl  Copyright 2000, 2003, 2004, 2006, 2007, 2010 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library test suite.
+
+dnl  The GNU MP Library test suite is free software; you can redistribute it
+dnl  and/or modify it under the terms of the GNU General Public License as
+dnl  published by the Free Software Foundation; either version 3 of the
+dnl  License, or (at your option) any later version.
+
+dnl  The GNU MP Library test suite is distributed in the hope that it will be
+dnl  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+dnl  Public License for more details.
+
+dnl  You should have received a copy of the GNU General Public License along
+dnl  with the GNU MP Library test suite.  If not, see
+dnl  https://www.gnu.org/licenses/.
+
+
+dnl  The current version of the code attempts to keep the call/return
+dnl  prediction stack valid, but matching calls and returns.
+
+include(`../config.m4')
+
+
+C void x86_fldcw (unsigned short cw);
+C
+C Execute an fldcw, setting the x87 control word to cw.
+
+PROLOGUE(x86_fldcw)
+	mov	%rdi, -8(%rsp)
+	fldcw	-8(%rsp)
+	ret
+EPILOGUE()
+
+
+C unsigned short x86_fstcw (void);
+C
+C Execute an fstcw, returning the current x87 control word.
+
+PROLOGUE(x86_fstcw)
+	movq	$0, -8(%rsp)
+	fstcw	-8(%rsp)
+	mov	-8(%rsp), %rax
+	ret
+EPILOGUE()
+
+
+dnl  Instrumented profiling won't come out quite right below, since we don't do
+dnl  an actual "ret".  There's only a few instructions here, so there's no
+dnl  great need to get them separately accounted, just let them get attributed
+dnl  to the caller.  FIXME this comment might no longer be true.
+
+ifelse(WANT_PROFILING,instrument,
+`define(`WANT_PROFILING',no)')
+
+
+C int calling_conventions (...);
+C
+C The global variable "calling_conventions_function" is the function to
+C call, with the arguments as passed here.
+C
+C Perhaps the finit should be done only if the tags word isn't clear, but
+C nothing uses the rounding mode or anything at the moment.
+
+define(`WANT_RBX', eval(8*0)($1))
+define(`WANT_RBP', eval(8*1)($1))
+define(`WANT_R12', eval(8*2)($1))
+define(`WANT_R13', eval(8*3)($1))
+define(`WANT_R14', eval(8*4)($1))
+define(`WANT_R15', eval(8*5)($1))
+
+define(`JUNK_RAX', eval(8*6)($1))
+define(`JUNK_R10', eval(8*7)($1))
+define(`JUNK_R11', eval(8*8)($1))
+
+define(`SAVE_RBX', eval(8*9)($1))
+define(`SAVE_RBP', eval(8*10)($1))
+define(`SAVE_R12', eval(8*11)($1))
+define(`SAVE_R13', eval(8*12)($1))
+define(`SAVE_R14', eval(8*13)($1))
+define(`SAVE_R15', eval(8*14)($1))
+
+define(`RETADDR',  eval(8*15)($1))
+
+define(`RBX',	   eval(8*16)($1))
+define(`RBP',	   eval(8*17)($1))
+define(`R12',	   eval(8*18)($1))
+define(`R13',	   eval(8*19)($1))
+define(`R14',	   eval(8*20)($1))
+define(`R15',	   eval(8*21)($1))
+define(`RFLAGS',   eval(8*22)($1))
+
+
+define(G,
+m4_assert_numargs(1)
+`GSYM_PREFIX`'$1')
+
+	TEXT
+	ALIGN(32)
+PROLOGUE(calling_conventions)
+	mov	G(calling_conventions_values)@GOTPCREL(%rip), %rax
+	pop	RETADDR(%rax)
+
+	mov	%rbx, SAVE_RBX(%rax)
+	mov	%rbp, SAVE_RBP(%rax)
+	mov	%r12, SAVE_R12(%rax)
+	mov	%r13, SAVE_R13(%rax)
+	mov	%r14, SAVE_R14(%rax)
+	mov	%r15, SAVE_R15(%rax)
+
+	C Values we expect to see unchanged, as per amd64check.c
+	mov	WANT_RBX(%rax), %rbx
+	mov	WANT_RBP(%rax), %rbp
+	mov	WANT_R12(%rax), %r12
+	mov	WANT_R13(%rax), %r13
+	mov	WANT_R14(%rax), %r14
+	mov	WANT_R15(%rax), %r15
+
+	C Try to provoke a problem by starting with junk in the caller-saves
+	C registers, especially %rax which will be the return value.
+C	mov	JUNK_RAX(%rax), %rax		C overwritten below anyway
+	mov	JUNK_R10(%rax), %r10
+	mov	JUNK_R11(%rax), %r11
+
+	mov	G(calling_conventions_function)@GOTPCREL(%rip), %rax
+	call	*(%rax)
+
+	mov	G(calling_conventions_values)@GOTPCREL(%rip), %rcx
+
+	mov	%rbx, RBX(%rcx)
+	mov	%rbp, RBP(%rcx)
+	mov	%r12, R12(%rcx)
+	mov	%r13, R13(%rcx)
+	mov	%r14, R14(%rcx)
+	mov	%r15, R15(%rcx)
+
+	pushf
+	pop	%rbx
+	mov	%rbx, RFLAGS(%rcx)
+
+	mov	SAVE_RBX(%rcx), %rbx
+	mov	SAVE_RBP(%rcx), %rbp
+	mov	SAVE_R12(%rcx), %r12
+	mov	SAVE_R13(%rcx), %r13
+	mov	SAVE_R14(%rcx), %r14
+	mov	SAVE_R15(%rcx), %r15
+
+	C Overwrite parameter registers
+C	mov	JUNK_R9(%rcx), %r9
+C	mov	JUNK_R8(%rcx), %r8
+C	mov	JUNK_RCX(%rcx), %rcx
+C	mov	JUNK_RDX(%rcx), %rdx
+C	mov	JUNK_RSI(%rcx), %rsi
+C	mov	JUNK_RDI(%rcx), %rdi
+
+	push	RETADDR(%rcx)
+
+	mov	G(calling_conventions_fenv)@GOTPCREL(%rip), %rcx
+	fstenv	(%rcx)
+	finit
+
+	ret
+
+EPILOGUE()