Quelle  call.cxx   Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
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#include <sal/config.h>

#include "call.hxx"

void privateSnippetExecutor()
{
    asm volatile
        (
         " subq $160, %rsp\n"

         " movq %r10, -152(%rbp) # Save (nVtableOffset << 32) + nFunctionIndex\n"

         " movq %rdi, -112(%rbp) # Save GP registers\n"
         " movq %rsi, -104(%rbp)\n"
         " movq %rdx, -96(%rbp)\n"
         " movq %rcx, -88(%rbp)\n"
         " movq %r8 , -80(%rbp)\n"
         " movq %r9 , -72(%rbp)\n"

         " movsd %xmm0, -64(%rbp) # Save FP registers\n"
         " movsd %xmm1, -56(%rbp)\n"
         " movsd %xmm2, -48(%rbp)\n"
         " movsd %xmm3, -40(%rbp)\n"
         " movsd %xmm4, -32(%rbp)\n"
         " movsd %xmm5, -24(%rbp)\n"
         " movsd %xmm6, -16(%rbp)\n"
         " movsd %xmm7, -8(%rbp)\n"

         " leaq -144(%rbp), %r9 # 6th param: sal_uInt64 * pRegisterReturn\n"
         " leaq 16(%rbp), %r8 # 5rd param: void ** ovrflw\n"
         " leaq -64(%rbp), %rcx # 4th param: void ** fpreg\n"
         " leaq -112(%rbp), %rdx # 3rd param: void ** gpreg\n"
         " movl -148(%rbp), %esi # 2nd param: sal_int32 nVtableOffset\n"
         " movl -152(%rbp), %edi # 1st param: sal_int32 nFunctionIndex\n"

         " call _cpp_vtable_call\n"

         " testl %eax, %eax\n"
         " je .Lfpint\n"
         " jg .Lintfp\n"

         " movq -144(%rbp), %rax # Potential return value (general case)\n"
         " movq -136(%rbp), %rdx # Potential return value (general case)\n"
         " movq -144(%rbp), %xmm0 # Potential return value (general case)\n"
         " movq -136(%rbp), %xmm1 # Potential return value (general case)\n"
         " jmp .Lfinish\n"

         ".Lfpint:\n"
         " movq -144(%rbp), %xmm0 # Return value (special fp and integer case)\n"
         " movq -136(%rbp), %rax # Return value (special fp and integer case)\n"
         " jmp .Lfinish\n"

         ".Lintfp:\n"
         " movq -144(%rbp), %rax # Return value (special integer and fp case)\n"
         " movq -136(%rbp), %xmm0 # Return value (special integer and fp case)\n"

         ".Lfinish:\n"
         " addq $160, %rsp\n"
         );
}
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