iOS, add old snippet script.

We need to check if the script generated the same code always.
Looks like nFunIndexes is never changed.

Change-Id: Ic247cccbf1e4a75e6a0acf5807fdcf84bfcf4cb3

1 files changed, 114 insertions, 0 deletions

diff --git a/bridges/source/cpp_uno/gcc3_ios/generate-snippets.pl b/bridges/source/cpp_uno/gcc3_ios/generate-snippets.pl
new file mode 100755
index 000000000000..a8548836fef3
--- /dev/null
+++ b/bridges/source/cpp_uno/gcc3_ios/generate-snippets.pl
@@ -0,0 +1,114 @@
+#!/usr/bin/perl -w # -*- tab-width: 4; indent-tabs-mode: nil; cperl-indent-level: 4 -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# 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/.
+#
+
+my $nFunIndexes = 8;
+my $nVtableOffsets = 4;
+
+sub gen_arm ($$)
+{
+    my ($funIndex, $vtableOffset) = @_;
+    if ($funIndex & 0x80000000) {
+        printf ("#ifndef __arm64\n");
+    }
+    printf ("codeSnippet_%08x_%d:\n", $funIndex, $vtableOffset);
+    printf ("#ifdef __arm\n");
+    # Note: pc is the address of instruction being executed plus 8
+    printf ("    mov ip, pc\n");
+    printf ("#else\n");
+    printf ("    adr x15, .+8\n");
+    printf ("#endif\n");
+    printf ("    b _privateSnippetExecutor\n");
+    printf ("    .long %#08x\n", $funIndex);
+    printf ("    .long %d\n", $vtableOffset);
+    if ($funIndex & 0x80000000) {
+        printf ("#endif\n");
+    }
+}
+
+sub gen_x86 ($$$)
+{
+    my ($funIndex, $vtableOffset, $executor) = @_;
+    printf ("codeSnippet_%08x_%d_%s:\n", $funIndex, $vtableOffset, $executor);
+    printf ("    movl \$%#08x, %%eax\n", $funIndex);
+    printf ("    movl \$%d, %%edx\n", $vtableOffset);
+    printf ("    jmp _privateSnippetExecutor%s\n", $executor);
+}
+
+printf (".text\n");
+
+printf ("#if defined(__arm) || defined(__arm64)\n");
+
+printf ("\n");
+printf ("// Each codeSnippetX function stores into ip (arm64: x15) an address and branches to _privateSnippetExecutor\n");
+printf ("// The address is that following the branch instruction, containing two 32-bit ints:\n");
+printf ("// - the function index, which for 32-bit can have the 0x80000000 bit set\n");
+printf ("//   to indicate that a hidden parameter is used for returning large values\n");
+printf ("// - the vtable offset\n");
+printf ("\n");
+
+printf ("    .align 4\n");
+printf ("\n");
+
+foreach my $funIndex (0 .. $nFunIndexes-1)
+{
+   foreach my $vtableOffset (0 .. $nVtableOffsets-1)
+   {
+       gen_arm ($funIndex, $vtableOffset);
+       gen_arm ($funIndex|0x80000000, $vtableOffset);
+   }
+}
+
+printf ("#else\n");
+printf ("    .align 1, 0x90\n");
+
+foreach my $funIndex (0 .. $nFunIndexes-1)
+{
+    foreach my $vtableOffset (0 .. $nVtableOffsets-1)
+    {
+        foreach my $executor ('General', 'Void', 'Hyper', 'Float', 'Double', 'Class')
+        {
+            gen_x86 ($funIndex, $vtableOffset, $executor);
+            gen_x86 ($funIndex|0x80000000, $vtableOffset, $executor);
+        }
+    }
+  }
+
+printf ("#endif\n");
+
+printf ("    .globl _nFunIndexes\n");
+printf ("_nFunIndexes:\n");
+printf ("    .long %d\n", $nFunIndexes);
+
+printf ("    .globl _nVtableOffsets\n");
+printf ("_nVtableOffsets:\n");
+printf ("    .long %d\n", $nVtableOffsets);
+
+printf ("    .globl _codeSnippets\n");
+printf ("_codeSnippets:\n");
+
+foreach my $funIndex (0 .. $nFunIndexes-1)
+{
+    foreach my $vtableOffset (0 .. $nVtableOffsets-1)
+    {
+        printf ("#if defined(__arm) || defined(__arm64)\n");
+        printf ("    .long codeSnippet_%08x_%d - _codeSnippets\n", $funIndex, $vtableOffset);
+        printf ("#ifndef __arm64\n");
+        printf ("    .long codeSnippet_%08x_%d - _codeSnippets\n", $funIndex|0x80000000, $vtableOffset);
+        printf ("#endif\n");
+        printf ("#else\n");
+        foreach my $executor ('General', 'Void', 'Hyper', 'Float', 'Double', 'Class')
+        {
+            printf ("    .long codeSnippet_%08x_%d_%s - _codeSnippets\n", $funIndex, $vtableOffset, $executor);
+            printf ("    .long codeSnippet_%08x_%d_%s - _codeSnippets\n", $funIndex|0x80000000, $vtableOffset, $executor);
+        }
+        printf ("#endif\n");
+    }
+}
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab: